Duck fabric connected by bonding

FIELD: production of duck fabrics.

SUBSTANCE: duck fabric is produced from longitudinal and transverse threads, where longitudinal threads are multifilament threads including multiplicity of single thread filaments and at least one thermally fusible filament of thermoplastic material. This at least one thermally fusible filament of thermoplastic material has lower melting point than single filaments of multifilament thread. After thermal processing, multifilament threads become harder and single filaments defining said multifilament threads are secured in conjunction with thermoplastic material of said at least one thermally fusible thread.

EFFECT: improved quality of duck fabric due to keeping of orientation and continuity of connecting loops necessary for bonding of fabric.

25 cl, 5 dwg

 

1. The technical field

This invention relates to paper manufacturing and related engineering fields. In particular, this invention relates to a variety of technical fabrics, which can be connected by seam when installing in a car, such as a press fabric for the press section of the papermaking machine.

2. Review of the known technical solutions

In the process of making paper webs of cellulose fibers is formed by deposition of a fibrous slurry, that is, the aqueous dispersion of cellulosic fibers on a moving forming fabric in the forming section of the papermaking machine. A large amount of water drains from the slurry through the forming fabric, leaving on the surface of the forming fabric webs of cellulose fibres.

Formed webs of cellulose fibres immediately departs from the forming section to the pressing section, which contains a number of pressing rolls. The webs of cellulose fibers is passed through the rolls supported by the pressing cloth, or, quite often, between two such fabrics. Between the rollers presses the webs of cellulose fibers is subjected to compressive efforts, which squeezed the water out of it and make the cellulose fibers in the fabric to stick to each other to make the webs of cellulose fibers in the paper the sheet. Water soaks the press fabric or fabrics and ideally not returned in a paper sheet.

Finally, the paper sheet is sent into the drying section, which contains at least one row of rotating drying drums or cylinders, which are internally heated by steam. The newly formed paper sheet is directed in a serpentine path sequentially around each set of reels with a drying fabric, which holds a sheet of paper near the surfaces of the drums. Heated drums reduce the water content of the paper sheet to the required level by evaporation.

It is clear that all the fabrics used in papermaking machine for forming, pressing and drying, have the form of an endless (closed) tapes and work like conveyors. In addition, it should be borne in mind that the paper making is a continuous process, which runs with great speed. That is, the fibrous slurry is continuously deposited on the forming fabric in the forming section, while fresh sheet of paper is continuously wound into a roll after it leaves the dryer section.

As for the fabric for pressing, it should be recalled that in the past they only came in the form of endless belts. This is because fresh canvas of CE is lulosic fibers are extremely sensitive to appearance under the action of the rolls presses prints created any heterogeneity in the tissue or tissues used for pressing. Endless seamless fabric that is made by a process known as "endless weaving has a uniform structure in its longitudinal direction (the direction of movement of the fabric in the machine)and transverse directions. The seam, which can be used to connect the fabric for pressing the endless belt during installation on a paper machine, represents the heterogeneity in homogeneous tissue structure for pressing. Therefore, the use of suture significantly increases the likelihood that the webs of cellulose fibers will occur prints with the passage of the fabric between the rollers of the press.

For this reason, the region of weld any connected machine fabric for pressing, suitable for use for this purpose, should behave under load, i.e. when the compression rollers of the press or presses, like the rest of the fabric for pressing and must have the same permeability to water and air, the rest of the fabric for pressing, in order to prevent periodic marking of the manufactured paper products area of the seam.

Despite the significant technical challenges associated with these required the quirements, development of connected car of the press fabric is highly desirable because of the comparative ease and safety with which such fabric may be installed in the pressing section. Ultimately, the obstacles were overcome by the development of fabrics for pressing, with seams that are generated by connecting loops located on the transverse edges of the two fabric ends. These loops designed for stitching fabric, threads are formed in the longitudinal direction of the fabric. To connect the two ends of the fabric together, stitch connected by information together two fabric ends for pressing, counter-comb placement of the loops at the two ends of the fabric relative to each other and passing the so-called stud or axis through the channel, which is formed of a counter-comb posted by coupling loops. Needless to say that the installation on a paper machine connected to the machine fabric for pressing is much easier and takes much less time than installing an endless belt made of cloth.

One of the ways of making fabric for pressing, which can be connected to the paper machine in such a seam is the formation of flat fabric. In this case, the warp threads are the threads of the longitudinal direction of the fabric for pressing. To form a connective is etli, the warp threads on the end of the fabric and turn again intertwine at some distance into the body tissue in the opposite parallel direction. Another technology that is much more preferred is a modified form of the method of the endless weaving, which is typically used for the manufacture of an endless belt of fabric. When a modified endless weaving weft threads continuously weave back and forth across the loom, forming at each passage on one of the edges of the fabric loop by holding the thread around the pin for forming loops. Because the weft thread, which eventually becomes the longitudinal thread in the fabric for pressing, is continuous, the connecting loops obtained in this way are more robust than those that can be formed by weaving the warp in the opposite direction to the edge pocketchange material.

Originally tissues for pressing joined on the car, in both directions, longitudinal and transverse, were used single strands of monofilament. The comparative stiffness of the monofilament guarantees the properties required for the formation of the connecting loops. However, experience has shown that single strands of monofilament difficult to weave and they are not elastic in the longitudinal direction for many types of modern press is. Often did stretching and destruction of the joint.

Another difficulty is a very open, hard and incompressible structure of the base fabrics woven from single monofilaments. For some applications in the manufacture of paper this incompressibility is not a problem and may even be the ideal property. However, where possible auxiliary dewatering fabric is insufficient, or in the production of paper grades that are sensitive to fingerprints required softer and more compressible base cloth.

More compressible base fabric may be woven or twisted multi-fiber monovacancy threads instead of a single monovacancy threads. However, the threads of these types do not have the rigidity required for the formation of a good loop or to maintain the integrity of the weld area with a counter-comb placement of loops that are needed when the spliced seam. In addition, because of these types of threads are woven, loop, from which they are formed, have a tendency to rotate with respect to the axes lying in the plane of these loops. When this rotation is known as the secondary effect of the spiral, it makes a loop to turn around, deflecting them from the ideal orientation required for counter-comb placement. This variation makes it difficult, if not impossible, is, the implementation of the required counter-comb placement of the loops at each end of the fabric during their connection, and the transmission axis through the channel formed by the loops placed counter-comb.

There are various attempts to overcome these difficulties by creating demonbreanii longitudinal yarns forming loops running like monofilament. In U.S. patent No. 5005610 longitudinal yarns to be joined by car fabric for paper production are complex, containing woven monovolumen. Woven yarn forms loops for stitching that resist deformation, and because they are balanced against torsion, no effect of the secondary spiral, leading to deviation from the ideal planar geometry of the joint.

In U.S. patent No. 5204150 longitudinal yarns to be joined by car fabric for paper production are twisted/twisted yarns extruded from a polymer, which partially melts during curing by heating tissue and gives the longitudinal strands characteristics similar to the characteristics of monovacancy thread. Although threads are unbalanced due to their twisting, fusing these threads, due to their partial melting, prevents rotation of the loops, leading to deviation from the ideal geometry of the joint.

In the patent the SHA No. 5391419 longitudinal strands connected by car fabric for paper production are twisted/twisted yarns with a coating that gives them a structure similar to a monofilament. The coating may be permanent, semi-permanent or soluble. Even though the threads may be unbalanced, the coating prevents the rotation of the loops.

In U.S. patent No. 5514438 longitudinal strands connected by car fabric for paper production are the core of twisted monofilaments surrounded by a braid of the multi-fiber yarns. Braid of the multi-fiber yarns binds twisted monovolumen with each other and prevents blocking of the channel formed by the counter-comb placement of the loops formed by the longitudinal threads, any of the monofilaments in the core during the stapling of tissue.

Finally, according to U.S. patent No. 5875822 longitudinal strands connected by car fabric for paper production are twisted/twisted yarns and form connecting loops along the transverse edges at the two ends of the fabric. Monovacancy connecting the spiral is attached to these loops at each end of the fabric. The spiral is used to connect the fabric into endless belt, thus forming a fabric having twisted/twisted longitudinal threads with means of connection, made of monofilament.

This invention represents another approach to the formation of the connected car technical fabric, they is the fact that twisted/twisted longitudinal threads with connecting loops, which maintain their integrity and proper orientation required to connect the fabric.

The invention

Accordingly, the present invention is the creation of a connected car technical fabric with multi-component longitudinal threads with connecting loops that maintain the proper orientation and integrity required to connect the fabric.

This objective in the proposed technical fabrics is achieved by the use as filaments in the longitudinal direction of the multicomponent filaments, containing a lot of single fiber yarn and at least one hot-melt fibers of a thermoplastic material which has a melting point lower than the melting point of the single fibers of the multicomponent filaments, as a result, after heat treatment, a given length of the multicomponent filaments at a temperature higher than the melting point of the hot melt fibers, but below the melting point of the single fiber filaments of thermoplastic material is melted and flows into the space between the single fibers of the thread and after heat treatment hardens again, making multicomponent filament hard and keeping it single fiber together on this specified length. This ensures that the connecting loops, which are formed of multicomponent filaments, save the adopted proper orientation and integrity, required for stapling tissue.

In addition, the inclusion of one or more hot-melt fibers in multicomponent filaments allows you to adjust the stiffness of the filaments, by varying the number and/or diameters included in the thread of the hot-melt fibers. In turn, this allows you to adjust the compressibility and elasticity of the tissue to a greater extent than is possible in fabrics made from yarns that do not have the hot-melt fibers.

Multicomponent filaments can be twisted monofilaments, multi-fiber yarns, can be multi-fiber yarns or twisted/twisted yarns, or their combination. Under twisted/twisted thread refers to any kind of yarn used in the manufacture of fabrics for paper machines, which has multiple threads or fibers that are twisted together in the desired degree and, in many cases, then the combined or Suite with other fibers of the same or of a different type. During the operation of twisting the components of threads unite with each other, twisting them in the opposite direction to the twisting of the single components. Twisted/twisted yarns may therefore be considered as a multicomponent filaments. Multicomponent filaments may be braided or knitted threads. In any case, multicomponent filament contains at least one t is replace fiber.

Single fiber included in the multicomponent filament, typically have a circular cross-section, although obviously they may have any other cross-section, for example rectangular, oval or multi-leaf cross-section. Multicomponent yarn made by twisting/sevanam, weaving or knitting, you may have a cross section that is in shape is not circular.

Proposed to be joined by car technical fabric can be woven on a modified technology endless weaving of the system of longitudinal yarns and a system of transverse threads, where the longitudinal yarns are multicomponent filaments described above. Alternatively, technical fabric may be woven flat, with the longitudinal yarns are warp threads during the weaving process, must also be multi-component fibers. In any case, technical fabric has a rectangular shape with a length, a width, two lengthwise edges and two transverse edges.

When using the modified technology endless weaving longitudinal (multi-component) threads are stretched back and forth continuously for the length technical fabric between the two transverse edges and form a first set of connecting loops along one of the two transverse edges and the second is notesto connecting loops along the other of the two transverse edges. After applying the heat treatment described above, which can be performed at any time during the production process, even at the stage of forming the threads, multicomponent strands and loops for stitching, which are formed from them, are becoming tougher and a lot of single fibers fastened together thermoplastic material of at least one hot-melt fibers are multicomponent filaments.

On the other hand, when the technical fabric is flat woven, the warp threads extending from two lateral edges, turn back and intertwine at some distance into the body tissue in the opposite direction to form a connecting loop.

Technical fabric spliced into an endless belt by a counter-comb connection of the connecting loops of the first set with connecting loops of the second set and the transmission axis through the channel, educated posted by counter-comb loops to form a hinge connection in the form of a seam connecting together two transverse edges of the fabric.

It is clear that the multicomponent filaments can also be used in the transverse direction, in order to improve the transverse stability of the fabric. In endless woven structure with a seam or no seam stiffness transverse filament directly determines the number of longitudinal and transverse threads,which can be incorporated into tissue. Use in weaving weave lesser rigidity allows you to get a wider range of fabric density and, in particular, the greater the density of the fabric. When described here multicomponent filament is used in the transverse direction, the number of longitudinal and transverse threads in the fabric can be increased, and the required rigidity can be given multi-component filaments by heating after the fabric is woven.

Such multicomponent filament can also be used as a filament in the longitudinal direction in plokotono material, which is connected in an endless ribbon woven seam, because they can be constructed so that they have gained the deformation required for the formation of such a seam.

Thus, according to the invention proposed technical fabric, containing a system of longitudinal yarns and a system of weft threads, where the longitudinal yarns interwoven with the transverse threads with the formation of technical fabrics in the form of a rectangle having a length, a width, two surfaces, two longitudinal edges and two transverse edges, wherein the longitudinal strands are multicomponent filaments, containing a lot of single fiber yarn and at least one hot-melt fibers of a thermoplastic material that has a melting point lower than the melting point shows the single fiber strands, so after heat treatment, the multicomponent filaments become tougher and many of them are single fibers attached to each other thermoplastic material of the specified at least one hot-melt fiber.

This technical fabric can be made with the possibility of snapping her in an endless tape loop connection when installing in a car, with the longitudinal yarns interwoven with the transverse threads modified by way of the endless weaving, in which the longitudinal yarns are continuously back and forth along the said length technical fabric between her two transverse edges and form a first set of connecting loops along one of the two transverse edges and the second set of connecting loops along the other of the two transverse edges; making technical fabric connected to the endless belt by a counter-comb placement of the first set of connecting loops relative to the second set of connective loops and transmission axis through the channel formed by the counter-comb spaced connecting loops to form referred to loop connection.

In addition, this technical fabric can be made with the possibility of snapping her in endless tape by connecting pin when e is installed in the machine, thus the longitudinal yarns interwoven with transverse filaments in flat weaving, in which the longitudinal yarns along the two transverse edges backward and woven back into technical fabric, forming a first set of connecting loops along one of the two transverse edges and the second set of connecting loops along the other of the two transverse edges; making technical fabric connected to the endless belt by a counter-comb placement of the first set of connecting loops relative to the second set of connecting loops and the transmission axis through the channel formed by the counter-comb spaced connecting loops to form the said connection pin.

In this technical fabric yarn system of longitudinal yarns may be interwoven with the threads in the system of transverse filaments in flat weaving, and two transverse edge technical fabrics can be connected to each other by a woven seam to be formed from a technical fabric endless belt.

The aforementioned multi-component filaments can be twisted strands of monofilaments or twisted strands of twisted multi-fiber threads.

Multicomponent filaments may represent a multi-fiber yarn. They can also be a woven/in the draw thread.

Multicomponent filaments may be selected from the group consisting of woven strands of monofilaments, woven of threads of the multi-fiber yarns, multi-fiber yarns, twisted/twisted yarns and combinations thereof.

Multi-component yarn may be knitted or woven threads.

Single fiber multi-component filaments can be extruded from a polymeric material. The polymeric material may be selected from the group consisting of polyamide, complex polyester, polyetherketone, polypropylene, polyaramid threads, polyolefin, polyphenylensulfide (PPS) and polyethylene terephthalate (PET) resins and their copolymers.

thermoplastic material of at least one hot-melt fibers can be selected from the group consisting of polyamide 66, fusible polyamide 6 and polyurethane.

At least one hot-melt fiber may be a monofilament or multifilamentary fiber.

At least one hot-melt fiber may be cut from a film of thermoplastic material or made of non-woven material.

The transverse filament in the proposed tissue can also be multicomponent filaments.

Technical fabric may further comprise at least one layer of a web of staple fibers attached to one of its two surfaces.

Chrome is also the above-mentioned technical fabric made with the possibility of snapping her in endless tape may further comprise a first connecting coil with many turns, placed counter-comb with connecting loops of the first set of connecting loops on one of the two transverse edges technical fabric and attached thereto at least one connecting thread running in the transverse direction; and a second coupling coil having many turns, placed counter-comb with connecting loops of the second set of connecting loops on the other of the two transverse edges technical fabric and attached thereto at least one connecting thread running in transverse direction; making technical fabric is locked in an endless ribbon by counter-comb placement of coils of the first connecting helix relative to the coils of the second connecting helix and the transmission axis through the channel formed by the counter-comb posted by coils these coils to generate the specified loopback connection.

In such a fabric of the first and second connecting helix may be made of monofilament, such monovacancies spiral can be extruded polyamide.

In addition, the unit is a mini tissue may further comprise at least one cushioning thread inside the first connecting helix. It can also optionally contain at least one cushioning thread inside the second connecting spiral.

Hereinafter the invention will be described in more detail with reference to the drawings listed below.

List of drawings

Figure 1 shows a schematic representation of a connected car technical fabrics in the future.

Figure 2 shows a schematic representation in perspective of the two ends of a connected car technical fabrics before their connection with each other.

Figure 3 shows a cross-section of technical fabrics in the direction of the framework.

Figure 4 shows the cross section of the weld area technical fabric in the weft direction.

Figure 5 shows the cross section of the weld area technical fabric, similar to the cross-section presented in figure 4, for another form of embodiment of the invention.

The detailed description of a preferred form of carrying out the invention

Refer now to figure 1 provides a schematic perspective representation of a connected car technical fabric 10. The fabric 10 takes the form of an endless belt, when the two ends 12, 14 are joined to each other by a seam 16.

Figure 2 is a schematic perspective representation of the two ends 12, 14 joined by car technical fabric 10 to their attachment to each other. The transverse edges of each of the two concow, 14 there are many connecting loops 18 for stapling tissue. To attach the two ends 12, 14 to each other, they are brought together, with the loops 18 of each of the ends interspersed through one, then there are counter-comb relative to each other. Counter-comb posted by hinges 18 form a channel through which you may be missing a pin or axle, thread or threadlike element to fasten the ends 12, 14 to each other.

Figure 3 shows performed in the direction of the warp section technical fabric 20, which can be applied to this invention. The fabric 20 is shown woven with bilateral weaving weave, although it should be clear that this weave is shown for example only, and the invention can be implemented with fabrics 20, which is woven with other weaves, such as one-, two - and three-layer weave or weave with more layers or fabrics that are laminated and contain multiple layers of fabric. The fabric 20 may be a base fabric for a press fabric and, accordingly, to it on one or both sides can be attached by igloprobivnye one or more layers of webs of staple fibers, or it may have some coverage. The fabric 20 can also be used in any other section of the paper Masha is s, that is, in the partition forming or drying, or as the technological base of a conveyor belt with a polymer coating for the paper industry. In addition, the fabric 20 may be used as a tape machine for corrugating or as a base for it, as the fabric for forming pulp, for example as a belt thickener with dual rollers, or other technological conveyor belts for industry.

The fabric 20 is woven using a modified method of the endless weaving. In this case, the threads 22 of the fundamentals will eventually become threads transverse direction, and weft threads 24 will eventually become threads in the longitudinal direction, if you rely on the orientation of the filaments relative to the machine on which is mounted the fabric 20.

Thread 22 basis, that is, the transverse filament connected on the machine the fabric 20 can be any of the threads used for the manufacture of bases for fabrics used in paper-making machines, or technological tapes for the paper industry, or other fabrics and tapes mentioned above. That is, the main thread 22 can be used monovacancies filament or multi filament described above.

On the other hand, the weft yarn 24, that is, the longitudinal strands being joined on the machine the fabric 20 are multi-component fibers. As described above, multi-component the iti can be twisted monofilaments, twisted multi-fiber yarns, can be multi-fiber or twisted/twisted yarns, or combinations thereof. Multicomponent filaments can be woven or knitted threads.

In any case, a single fiber thread main thread 22 (transverse threads and weft threads 24 (lengthwise threads) of the extruded synthetic polymeric materials such as polyamide, complex polyester, polyetherketone, polypropylene, polyaramid threads, polyolefin, polyphenylensulfide (PPS) and polyethylene terephthalate (PET) resins and their copolymers, and are combined into a yarn according to methods well known in the textile industry and, in particular, in the production of fabrics for paper machines.

Weft (lengthwise) threads in addition to the presence of many single fibers also contain at least one hot-melt fibers of a thermoplastic material and thermoplastic material has a melting point lower than the melting point of the single fiber filaments forming the multicomponent filament. As a result, after the heat treatment with a temperature above the melting point of the hot melt fibers, but below the melting point of single fibers multicomponent filaments of thermoplastic material makes it more hard multicomponent yarn, and loop 18 formed from it, and derive the single fiber multicomponent filaments together. Due to this, the connecting loops for stapling tissue, which is formed from multicomponent filaments retain proper orientation and required for such stapling integrity. thermoplastic material may, for example, be a polyamide 66, a low-melting polyamide 6 or polyurethane.

As noted above, the multicomponent yarn contains at least one hot-melt fibers of a thermoplastic material. That is, it may contain one, two, three or more hot-melt fibers. Hot-melt fiber may be a monofilament or multifilamentary fiber, and the other type of fiber may have a non-circular cross-section. It can be extruded or cut from a film of thermoplastic material. It can also be fiber or fibers obtained or cut from a cloth of woven material made of polyamide or polyurethane with a low melting point. Webs of nonwoven materials of this type are marketed by the firm Sharnet.

In the process of manufacture of the fabric 20 by the modified method of the endless weaving the weft yarn continuously are woven back and forth across the loom, and with each pass across the width on one of the two transverse edges of the fabric 20 are formed in the connecting loops for stitching fabric, woven with preharden and thread around the pin for forming loops. Several schemes described in U.S. patent No. 3815645 included in this text by reference, is suitable for the manufacture of connected car fabrics for the manufacture of paper by the modified method of the endless weaving and can be used when implementing the present invention.

Figure 4 shows made in the weft direction of the cross-section of the seam area of the fabric 20, the resulting modified endless weaving process. The weft yarn, which will eventually become the longitudinal threads of the fabric 20, entwined around the pin 26 forming loops in a continuous manner to form a connecting loop 18 for stapling tissue.

It should be clear that the pin 26 forming the loops must be removed to make the fabric 20 is the shape with which it can easily be installed in a particular machine. It is also clear that as the weft (lengthwise) threads are multicomponent filaments, loops 18 may be rotated, deviating from the ideal geometry of the connecting loops due to the effect of secondary spirals, and deform as soon as the pin 26 forming the loop is removed, which makes subsequent stitching fabric difficult or impossible.

For this reason, the heat treatment that makes it hard and combines multi-component filaments, perform before bademoden pin 26, forming a loop. However, it should be clear that the heat treatment may be performed either before or after the fabric 20 will be weaved, and even at the stage of forming the threads. In addition, if the fabric 20 must be attached by igloprobivnye the webs of staple fibers, the heat treatment may be performed either before or after igloprobivnye, although the heat treatment after igloprobivnye preferable, because thermoplastic material of at least one hot-melt fibers improves the fixation of the material of the webs of staple fibers in the base fabric 20.

Technical fabric spliced into an endless belt by a counter-comb placement of the connecting loops 18 at one end of the fabric relative to the loops at the other end, and a transmittance axis through the channel formed by the counter-comb posted by hinges 18. Alternatively, as shown in figure 5, where given a different section of the seam area of the fabric 20, made in the longitudinal direction, the loops 18 may be attached to the connecting helix 28, which are used to connect the fabric 20 in an endless ribbon.

In particular, the connection of the helix 28 can accommodate counter-comb relative to the connecting loops 18 and to connect with them by means of connecting threads 30. Thus, t is Anh 20, with multicomponent filaments in the longitudinal direction, can be supplied monovoltine connecting loops in separate orbits connecting helices 28.

Connecting helix 28 can be made of monofilament, preferably of extruded polyamide resin. The diameter of the monofilament may be, for example, is 0.40 or 0.50 mm During installation of the fabric 20 in a papermaking machine, the individual coils of the connecting helices 28, as monovoltine, can be easily placed counter-comb relative to each other and connected to each other by passing the axis 32 through the channel formed by the counter-comb posted by turns. In the connecting helix 28 can be inserted cushioning threads 34 so that the area of the seam had characteristics similar to the rest of the fabric 20. Connecting threads 30 and intermediate filaments 34 may be threads of the same types that are used as major (transverse) threads 22 of the fabric 20. As the axis 32 can be used a single strand of monofilament, a few strands of monofilament, twisted relative to each other, or curled, twisted, woven or bound together, or one or more multi-component fibers, as described above longitudinal (weft) threads 24 of the fabric 20.

For normal specialists in this about the Asti equipment obviously, there are various ways to create the above-described technical fabrics in the framework of the invention, the scope of which is defined by the attached claims.

1. Technical fabric, containing a system of longitudinal yarns and a system of weft threads, where the longitudinal yarns interwoven with the transverse threads with the formation of technical fabrics in the form of a rectangle having a length, a width, two surfaces, two longitudinal edges and two transverse edges, wherein the longitudinal strands are multicomponent filaments, containing a lot of single fiber yarn and at least one hot-melt fibers of a thermoplastic material that has a melting point lower than the melting point of the specified single fiber strands, so that after heat treatment of multicomponent filaments become tougher and many of them are single fibers attached to each other thermoplastic material specified at least one hot-melt fiber.

2. Technical fabric according to claim 1, characterized in that it is made with the possibility of snapping her in an endless tape loop connection when installing in a car, with the longitudinal yarns interwoven with the transverse threads modified by way of the endless weaving, in which the longitudinal yarns are continuously back and forth along the mentioned is Lina technical fabric between her two transverse edges and form a first set of connecting loops along one of the two transverse edges and the second set of connecting loops along the other of the two transverse the edges, so the technical fabric is connected to the endless belt by a counter-comb placement of the first set of connecting loops relative to the second set of connecting loops and the transmission axis through the channel formed by the counter-comb spaced connecting loops to form referred to loop connection.

3. Technical fabric according to claim 1, characterized in that it is made with the possibility of snapping her in endless tape by connecting pin when installing in a car, with the longitudinal yarns interwoven with transverse filaments in flat weaving, in which the longitudinal yarns along the two transverse edges backward and woven back into technical fabric, forming a first set of connecting loops along one of the two transverse edges and the second set of connecting loops along the other of the two transverse edges, so the technical fabric is connected to the endless belt by a counter-comb placement of the first set of connecting loops relative to the second set the connecting loops and the transmission axis through the channel formed by the counter-comb spaced connecting loops to form the said connection pin.

4. Technical fabric pop, characterized in that the thread system of longitudinal yarns interwoven with threads in the system of transverse filaments in flat weaving, and two transverse edge technical fabrics are connected to each other by a woven seam to be formed from a technical fabric endless belt.

5. Technical fabric according to claim 1, wherein the multicomponent filaments are twisted strands of monofilaments.

6. Technical fabric according to claim 1, wherein the multicomponent filaments are twisted strands of twisted multi-fiber threads.

7. Technical fabric according to claim 1, wherein the multicomponent filaments are multi-fiber threads.

8. Technical fabric according to claim 1, wherein the multicomponent filaments are twisted/twisted threads.

9. Technical fabric according to claim 1, wherein the multicomponent filaments are filaments selected from the group consisting of woven strands of monofilaments, woven of threads of the multi-fiber yarns, multi-fiber yarns, twisted/twisted yarns and combinations thereof.

10. Technical fabric according to claim 1, wherein the multicomponent filaments are knitted threads.

11. Technical fabric according to claim 1, wherein the multicomponent filaments are braided threads.

12. Technical fabric according to claim 1, characterized in that a single fiber of mnogokomponentnye the filaments extruded from a polymeric material.

13. Technical fabric according to item 12, wherein the polymeric material is selected from the group consisting of polyamide, complex polyester, polyetherketone, polypropylene, polyaramid threads, polyolefin, Polyphenylene sulfide (PPS) and polyethylene terephthalate (PET) resins and their copolymers.

14. Technical fabric according to claim 1, characterized in that thermoplastic material, at least one hot-melt fibers selected from the group consisting of polyamide 66, fusible polyamide 6 and polyurethane.

15. Technical fabric according to claim 1, characterized in that at least one hot-melt fiber is a monofilament.

16. Technical fabric according to claim 1, characterized in that at least one hot-melt fiber is multifilamentary fiber.

17. Technical fabric according to claim 1, characterized in that at least one hot-melt fiber is cut out from a film of thermoplastic material.

18. Technical fabric according to claim 1, characterized in that at least one hot-melt fiber is made of non-woven material.

19. Technical fabric according to claim 1, characterized in that the transverse threads are multicomponent filaments.

20. Technical fabric according to claim 1, characterized in that it further comprises at least one layer of a web of staple fibers attached to one of the DV is x its surfaces.

21. Technical fabric according to claim 2 or 3, characterized in that it further comprises a first connecting coil with many turns, placed counter-comb with connecting loops of the first set of connecting loops on one of the two transverse edges technical fabric and attached thereto, at least one connecting thread running in the transverse direction, and the second connecting coil with many turns, placed counter-comb with connecting loops of the second set of connecting loops on the other of the two transverse edges technical fabric and attached thereto, at least one connecting thread passing in the transverse direction, allowing the technical fabric is locked in an endless ribbon by counter-comb placement of coils of the first connecting helix relative to the coils of the second connecting helix and the transmission axis through the channel formed by the counter-comb posted by coils these coils to generate the specified loopback connection.

22. Technical fabric according to item 21, wherein the first and second connecting helix made of monofilament.

23. Technical fabric according to item 22, wherein the specified monovacancies spiral extruded polyamide.

24. Technical fabric according to item 21, characterized in that it further comprises at least one cushioning thread inside the first connecting spiral.

25. Technical fabric according to item 21, characterized in that it further comprises at least one cushioning thread inside the second connecting spiral.



 

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2 tbl, 5 ex

FIELD: mechanisms and processes for cutting corrugated cardboard.

SUBSTANCE: apparatus includes framework, drive unit, drum, cutting mechanism with movable cutter, mechanism for fixing cutter blade relative to drum and accumulator. Apparatus also includes mechanism for changing length of blanks, unit for fixing its position, blank length indicator. Mechanism for changing length of corrugated cardboard blanks is provided with screw gage whose nut having control knob is jointly secured to framework. Screw of said mechanism is kinematically coupled with two-arm lever mounted with possibility of angle rocking in journal of drum shaft. One arm of lever is jointly coupled with blank length indicator; distal end of its other arm has pivot for mounting driven gear wheel and crank. Said gear wheel engages with driving gear wheel mounted on end of drum. Crank is provided with roller mounted in connecting link of mechanism for converting uniform rotation to intermittent one. Such mechanism includes driving pinion mounted in end of shaft of cutting mechanism and mutually opposite drive members mounted on platform and cyclically engaging with driving pinion. Said platform is mounted on upper ends of pair of parallel tie rods that may perform reciprocation motion in guide and are spring-loaded relative to said guide. The last is mounted with possibility of angular rocking on end of shaft of cutting mechanism near gear wheel. Lower parts of tie rods are arranged with possibility of fixing their position in connecting link of mechanism for converting uniform rotation to intermittent one. In other end of shaft of cutting mechanism are mounted: member for fixing intermediate positions in the form of braking drum secured to framework and pair of mutually spring-loaded and mounted one opposite to other braking shoes with friction cover plates. Braking shoes are adjoined to inner cylindrical surface of braking drum. Mean portions of braking shoes are joined by means of tie rods with two-arm lever mounted in end of shaft of cutting mechanism. In mean part of said shaft along the same axis hollow shaft of cutter holder is arranged, both shafts are mutually joined through bearing assemblies, brackets and set of elastic members placed between shafts. Said shafts are also joined by means of bracket of mechanism (two-arm lever) for fixing cutter blade relative to drum. Rocking axle of mechanism for fixing cutter blade is mounted in bracket of hollow shaft. One end of two-arm lever is joined with tie rod

for coupling with lever of shaft, other distal end of two-arm lever is provided with roller that cyclically engages with stop secured to bracket of framework.

EFFECT: enhanced efficiency, operational reliability, simplified design, lowered labor consumption for maintenance and adjustment, reduced energy consumption, increased useful life period.

5 cl, 31 dwg, 3 tbl

FIELD: shearing equipment.

SUBSTANCE: device comprises frame, drive, drum, cutting mechanism with movable blade, fixing mechanism for initial blade position fixation relative drum and accumulation means. Device is provided with blocking mechanism, which secures position of movable blade drive shaft, discrete angular drive of movable blade and changes corrugated cardboard blank lengths. The blocking device is made as screw pair. Screw pair nut is pivotally connected to the frame, screw thereof is pivotally linked with double-armed lever having pivot pin aligned with axis of drum rotation. The second arm of the lever is kinematically linked with T-shaped connecting-rod of cutting mechanism drive by control-rod. One end of connecting-rod is connected to crankshaft on drum pivot, another end thereof is mounted on control-rod attached to swinging unit of three-armed lever of discrete angular drive mechanism of movable blade arranged to perform angular swinging about pivot of mutually connected brake drum and drive pinion. Drive pinion is brought into engagement with driven pinion on cutting mechanism drive shaft end. Pair of mutually spring-loaded brake blocks is installed in brake drum kinematically connected through control-rods with ends of oppositely directed arms of three-armed lever. Blocking mechanism for cutting mechanism drive shaft blockage is mounted on another end of above shaft. The blocking mechanism is made as brake drum installed on frame. Pair of mutually spring-loaded brake blocks is arranged into the drum and kinematically linked with double-armed lever by control-rods. The double-armed lever is coaxial with geometrical axis of cutting mechanism drive shaft including lever of mechanism for fixing movable blade in its initial position. The lever is linked with double-armed lever by control-rod. Free end of double-armed rod has roller periodically cooperating with frame rest. Pivot of double-armed lever of fixing mechanism is arranged on bracket of hollow blade holder shaft. Blade holder is installed on hollow shaft with the use of threaded pins. Blade is removably installed in blade holder groove. The blade is made as conventional replaceable bar for cross-cutting corrugated cardboard. Hollow blade holder shaft is coaxially arranged on cutting mechanism drive and may perform limited rotation. Hollow blade holder shaft is connected with cutting mechanism by a plurality of resilient members.

EFFECT: increased output, operational reliability, cutting quality and blank length accuracy.

1 dwg

FIELD: equipment for through blowdown drying, may be used in forming, pressing and drying sections of papermaking machine.

SUBSTANCE: base-forming grid has warp threads interwoven with weft threads. Some warp threads are threads of first type and some warp threads are threads of second type. First type warp threads are interwoven with weft threads by plain weave and second type warp threads are interwoven with weft threads by 2/2 serge weave, with first type warp threads alternating with second type warp threads. Second type warp threads are extending in wavy path between adjacent first type warp threads to render required openness to grid.

EFFECT: provision for producing grid with open structure to provide for effective mutual mechanical binding of cured resin with warp and weft threads.

16 cl, 6 dwg

FIELD: pulp-and-paper industry.

SUBSTANCE: fabric 10 is designed to be connected by stitches upon placement onto papermaking machine. Fabric 10 has base fabric 14 with stitch loops on its transverse edges for connecting fabrics into endless web upon placement thereof onto papermaking machine. Stitch made by interdigitated arrangement of stitch loops connected with one another through pin 20 is closed with strip 24 from flow resistant material, or, if base fabric has upper and lower layers, strips of said material are placed between upper and lower layers close to stitch. Owing to flow resistant material, air and moisture permeability of fabric portion adjoining to stitch is essentially identical to said permeability of other portion of fabric for papermaking machine. At least one web layer of staple fiber is tingled with base fabric and flow resistant material.

EFFECT: increased efficiency by providing compensation of difference in air permeability and moisture permeability between stitch and other part of fabric for papermaking machine.

16 cl, 5 dwg

The invention relates to the pulp and paper industry and can be used in the manufacture of paper for corrugated cardboard

The invention relates to the pulp and paper industry and can be used in the manufacture of cardboard for flat layers of corrugated paperboard used in the manufacture of small packagings

Press // 2228848
The invention relates to presses with flat working surfaces and can be used for restoration of documents on paper

FIELD: production of fabrics for manufacture of protective clothing, preferably protective vests and plates, as well as for sewing of special sportive protective fencer's clothing, such as vests, side and chest protective means used during exercising.

SUBSTANCE: biaxiisotropic fabric is manufactured in bark weaving pattern from warp and weft threads of similar composition and linear density and with similar warp and weft repeat pattern. In weaving repeat pattern, any one of two halves of six-thread weaving repeat pattern sized 3x6 or 6x3 along warp or weft threads, turned through 180 deg, is identical to other unturned half. Fabric has one and a half layers which are connected with one another through all warp and weft threads. Said threads are transferred from one layer to another, and each of warp and weft threads forms two elongated double-thread overlaps and two short single-thread overlaps in weaving repeat pattern. Diagonal sections of weaving repeat pattern define four triangular fragments, each of which, when turned through 180 deg, coincide with pattern of respective symmetrical non-turned fragment. Biaxiisotropic fabric of such structure has resistance coefficient of at least 0.9 and relatively low flexural rigidity (not in the excess of 5/0 gf/cm).

EFFECT: increased efficiency, improved protective properties and wider range of usage.

2 dwg, 1 tbl

FIELD: textile industry, in particular, duck fabric used as endless belt for forming and transportation of nonwoven fibrous cloth for manufacture of nonwoven fabric.

SUBSTANCE: duck fabric has cloth carrier surface comprising threads having rough surface, said threads hindering displacement, more precisely, sliding of nonwoven fibrous cloth relative to cloth carrier surface. These threads with rough surface preferably define elongated overlaps on cloth carrier surface in one or two directions, i.e., in cloth movement direction in machine and/or in direction perpendicular to fabric movement direction in machine.

EFFECT: increased efficiency by preventing displacement or sliding of nonwoven cloth relative to belt surface.

26 cl, 6 dwg

FIELD: fabric used as reinforcing carcass of technical articles with polymeric covering, preferably used as protective layer-breaker for rubberized cord of conveyor belts, rubberized sleeves and other technical articles.

SUBSTANCE: biaxiisotropic duck fabric is manufactured by double-layer weaving of warp and weft threads having similar composition of raw material and linear density of threads and similar pattern repeat of weavings in warp and weft. Fabric layers are connected with each other simultaneously by all warp and weft threads passing from layer to layer. In weaving pattern repeat, each warp and weft thread forms two long three-thread overlaps and two eight-thread single-thread overlaps. Any half the pattern of eight-thread weaving pattern repeat of 4x8 size or 8x4 size along warp and weft threads, after being turned to the right or to the left through right angle, coincides with respective half the pattern repeat of opposite thread system, and upon turning through 180° it coincides with pattern of second half of similar pattern of thread system, with fabric tenacity coefficient being within 3.0-10. Fabric produced has warp and weft rupture loading of at least 140 kgf/cm and tenacity coefficient of at least 3.0.

EFFECT: improved quality and wider range of duck fabrics.

1 dwg, 1 tbl

Technical fabric // 2258105

FIELD: textile industry.

SUBSTANCE: invention relates to manufacture of fire-protection fabrics with heat-protection properties destined for militaries, firemen, foundry workers, welders, metallurgists, and so on. Fabric contains, in warp and weft, staple yarn including staple fibers based on triple aromatic copolyamide or mixture of triple aromatic copolyamide based fibers with natural fibers, or mixture of triple aromatic copolyamide based fibers with artificial fibers, or mixture of triple aromatic copolyamide based fibers with synthetic fibers, wherein triple aromatic copolyamide is expressed by following general formula: [-NH-R1-NHCO-R2-CO-]n[-NH-R3-NHCO-R2-CO]m[-NH-R2-NHCO-R2-CO]p, where n=0.05-0.4, m=0.6-0.95, p=0.05-0.4; R1-3 denote bivalent aromatic radicals in p-position, of which R1 is heterocyclic radical of formula , R2 p-phenylene, and R3 radical of formula . More specifically, natural fibers utilized are cotton, flaxen , and wool fibers; synthetic fibers are polyester(ether) and polyacrylonitrile fibers; and artificial fibers are fire-resistant viscose fibers.

EFFECT: increased resource of raw materials and assortment possibilities, and improved working characteristics of fabric.

FIELD: pulp-and-paper industry.

SUBSTANCE: web has system of filaments extending along machine, system of first filaments extending transverse to machine, system of second filaments extending transverse to machine and interwoven with filaments extending along machine in first zone along one of two transverse edges of web for papermaking machine between system of first filaments and stitch loops of second weaving pattern, system of third filaments extending transverse to machine and interwoven with filaments of system extending transverse to machine in second zone along other of two transverse edges of web for papermaking machine between system of first filaments and stitch loops of third weaving pattern. System of third filaments has at least two filaments extending transverse to machine. Second zone is characterized in that denier of at least some of third filaments differs from that of first filaments, gaps between at least some of third filaments differ from those between first filaments, and third weaving pattern differs from that of first pattern.

EFFECT: increased efficiency and improved quality of seam of web for papermaking machine.

62 cl, 5 dwg

FIELD: textile industry, in particular, providing textile surface with at least one side having increased degree of visual contrast.

SUBSTANCE: textile surface is produced on the basis of threads or filaments of at least three types, namely, extinguishing threads or filaments, thermally stable threads or filaments and threads or filaments with increased degree of visual contrast.

EFFECT: enhanced protection from elevated temperatures and free flame.

10 cl, 1 dwg

FIELD: textile industry, in particular, providing textile surface with at least one side having increased degree of visual contrast.

SUBSTANCE: textile surface is produced on the basis of threads or filaments of at least three types, namely, extinguishing threads or filaments, thermally stable threads or filaments and threads or filaments with increased degree of visual contrast.

EFFECT: enhanced protection from elevated temperatures and free flame.

10 cl, 1 dwg

The invention relates to woven materials with a peculiar arrangement of threads and can be used in the manufacture of composite materials

The invention relates to the textile industry, in particular the production of woven materials and can be used for the manufacture of protective clothing for special purposes for employees residing in legkonastraivaemy atmosphere, for example, for firefighters, workers filling stations, workers in the oil and gas industry
Fabric // 2237115

FIELD: textile industry, in particular, providing textile surface with at least one side having increased degree of visual contrast.

SUBSTANCE: textile surface is produced on the basis of threads or filaments of at least three types, namely, extinguishing threads or filaments, thermally stable threads or filaments and threads or filaments with increased degree of visual contrast.

EFFECT: enhanced protection from elevated temperatures and free flame.

10 cl, 1 dwg

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