Method of film stretching

FIELD: manufacturing technology.

SUBSTANCE: invention relates to laminated material producing method containing non-woven fabric and film. This method comprises heating initial thermoplastic polymer material film, containing at least one low-melting polymer component and at least one high-melting polymer component, until at least partially melted state. At that, at least one low-melting polymer component is in melted liquid state, and at least one high-melting polymer component is not in melted liquid state. Melting is performed by means of at least one heating cylinder. Then performing cooled by passing of partially melted film via cooled cylinders clamp. Film is stretched between at least one heating cylinder and cooled cylinders clamp. Produced films can be laminated together with nonwoven material. Laminated material is used in medicine or hygiene fields.

EFFECT: technical result achieved when using method and laminated material according to inventions, consists in production of thinner films.

9 cl, 1 dwg, 3 tbl, 1 ex

 



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to production of polymer tape from secondary polyethylene terephtalate suitable for use as edge tape, etc. Polymer tape is produced by extruding the melt from secondary polyethylene terephtalate that contains inhomogeneous mix of polyethylene terephtalate wastes with initial characteristic viscosity of 0.60-0.80 dl/g. Note here that said initial polyethylene terephtalate is composed of wastes of amorphous-crystalline polyethylene terephtalate mixed with 0.1-1.0 wt % of 1,3-phenylene-bis(2-oxazollinum). Obtained mix is extruded in vacuum to make the tape by spraying.

EFFECT: higher strength and elongation.

2 cl, 1 tbl, 3 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of polymer tape from secondary polyethylene terephtalate suitable for use as edge tape in making seamless 3D geoweb, etc. In compliance with this invention, amorphous crystalline wastes of polyethylene terephtalate are mixed with 0.1-1.0 wt % of 1,3-phenylene-bis(2-oxazoline). Produced mix is extruded at residual pressure, preferably, 8.0-8.5 kPa and extrusion temperature distributed among the zones: I-III zones - 250-260C, IV-X zones - 255-265C, XI main zone - 200-210C. Produced strand is cooled, pelletised and dried at 1502C to residual humidity of not over 0.02% and pellets are extruded at: I zones - 245-255C, II, III zones 265-275C, IV zone - 255-265C, V main zone - 240-250C with subsequent tape forming by calendaring at three-roll calendar cooled by running water circulated inside the rolls.

EFFECT: better mechanical properties.

3 cl, 1 tbl, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to plastic bag continuous production plant. Proposed plant comprises means for feeding material for wall and sides with folds, means for temporary fastening, jointing and guiding means.

EFFECT: production of plastic bags with rectangular bottom and closable opening.

9 cl, 13 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to protection of articles from thermoplastic polymer against scratches. Proposed method comprises application of protective layer by co-extrusion, or extrusion, or multi-moulding, and, at least, one thermoplastic polymer. Said protective layer comprises acrylic polymer including the following components in wt %: 80 - 99.8% of methyl methacrylate (MMA); 0 - 20%, of, at least, one copolymer capable of radical copolymerisation with MMA, and 0.2 - 10% of toxilic anhydride, or acrylic and/or methacrylic acid and, not obligatorily, anhydride groups of the following formula: wherein R1 and R2 stand for H- or methyl radical.

EFFECT: improved impact strength.

13 cl, 1 tbl, 6 ex

Composite material // 2393958

FIELD: chemistry.

SUBSTANCE: invention relates to production of a novel composite material based on peat and can be used to make, for instance package liners, containers for prolonged storage of vegetables, fruits, as well as for making construction slabs for walls, partition walls, ceilings and facing tiles for interior decoration of aeroplanes, ships, buildings etc. The composite material contains filler - waste paper and highland sphagnum moss or highland sphagnum peat humus; binder - tall rosin or alumina. The material also contains an aqueous extract of peat mud obtained by extraction of peat mud using mineral water sodium bicarbonate. The composite material has the following ratio of components, in wt %: waste paper - 44-46, highland sphagnum moss or highland sphagnum peat humus - 48-49, tall rosin - 1.6-1.76, alumina - 0.7-0.9, aqueous extract of peat mud - the rest.

EFFECT: preparation of composite material with better technical properties of articles, specifically improved quality owing to higher sorption capacity.

2 dwg, 1 tbl, 3 ex

FIELD: technological processes.

SUBSTANCE: stated invention is related to the field of plastics processing, to production of films, namely to devices for cooling of films made by extrusion through annular slot by upward blowing of tube. Technical result is achieved in device for cooling of tubular film made by extrusion through annular slot by upward blowing of tube. Device comprises extrusion head, annular sprayer for water supply to external surface of tube and facility for collection of water that flows down along tube. Besides facility for water collection is arranged in the form of bath installed on head via heat insulation ring that covers annular slot with its internal conic opening.

EFFECT: simplified technological process of film production, increased efficiency and improved quality of manufactured film.

2 dwg

FIELD: technological processes.

SUBSTANCE: rubber-polymer plates are designed for lining of different surfaces and structures exposed to permanent load and wear. Layer of uncured rubber 1.5÷20.0 mm thick is placed in mould with regulated shear deformation, above which layer of ultrahigh molecular polyethylene is evenly filled with molecular mass of 1.5·106 g/mole ÷ 10.0·106 g/mole. Volume of ultrahigh molecular polyethylene layer filling is calculated on the basis of final height of compact polyethylene layer, selected from 1.5 to 20.0 mm, cross section of mould and density of ultrahigh molecular polyethylene of 0.936 g/cm3. Then prepared composite is exposed to volumetrical compression in mould and then sintered at the temperature of 160÷210°C, pressure of 30 kg/cm2, and cure for 15 minutes - 1.5 hour.

EFFECT: preset thickness of plates and high strength of connection between layers.

FIELD: building.

SUBSTANCE: stated invention relates floor covering of synthetic formless marble and its production method, and in particular to floor covering of formless marble on base of synthetic pitch, made with formless marble picture. Technical result is reached with production method of floor covering of formless marble, including stage of compound agitation on base of synthetic pitch with self-cloured pieces of different colours and primary rolling of agitated compound with creation of primary rolled sheet. Then primary rolled sheets are laminated with its cutting till stated dimension and rotation. Then second rolling of laminated sheets is made with the help of low-temperature calendaring at the temperature from 60 to 100°C with creation of channeled stripes on sheet surfaces. Roughened surface of secondary rolled sheets created in result of low temperature calendaring along with channeled stripes are filled with the help of double blocking system. At that first blocking unit includes roller which can create any type of blocking, including blocking in longitudinal direction.

EFFECT: creation of floor covering of formless marble having more high level of durability to colouring and surface durability, as well as stretched stripes of formless marble and glazed surface, and production method of such covering.

5 cl, 4 dwg, 1 ex

FIELD: chemical industry; other industries; medicine; methods of manufacture of the perforated three-dimensional film used in medicine.

SUBSTANCE: the invention is pertaining to manufacture of the perforated film used in medicine. The method of manufacture of the perforated three-dimensional film includes formation of the three-dimensional topographic unit of the substrate, placing of the film along the glyptic exterior surface of the component of the substrate, and deformation of the film, so that its shape corresponded to the external surface of the component of the substrate. Relocating the laser beam along the external surface of the treated detail they form the topographic component of the substrate at modulation of the radiated power of the laser beam between, at least, of three power levels, thus hewing the external surface of the treated detail for formation of the three-dimensional topographic component of the substrate. Predominantly the modulation is exercised by means of the control unit, which adjusts the radiated power of the laser beam according to the succession of previously set commands.

EFFECT: the invention ensures the reliable manufacture of the perforated three-dimensional film used in medicine.

14 cl, 28 dwg

FIELD: chemical industry; methods of production of the piezofilm materials.

SUBSTANCE: the invention is pertaining to the method of production of the piezofilm materials out of the high-molecular thermoplastic polymers, copolymers and their mixtures. The piezofilm materials may be used in the different kinds of the instruments and devices. The method provides for production of the non-oriented film, operations of its orientation, polarization, action of the ionizing radiation and the repeated polarization. Then the polarized film is additionally exposed to the action of ultraviolet irradiation before and-or after the ionizing radiation with the subsequent polarization after each kind of action. The technical result of the invention is improvement of the energy parameters of the produced material.

EFFECT: the invention ensures improvement of the energy parameters of the produced material.

5 tbl, 5 ex

FIELD: process engineering.

SUBSTANCE: flexible film sleeve 10 is cut in helix to flat strip by unwinding the film by rotary unwinder 1 on feeding flat film to sleeve expansion zone. Flat sleeve expands in said zone to round cylindrical sleeve to be passed axially above hollow mandrel 14 that feature OD slightly smaller than expanded sleeve diameter. Cutting is performed by knife 18 arranged at mandrel to flat strip moving off toward mandrel axis at an angle. Flat sleeve is stretched in lengthwise direction by tensioning tolls 107-112 revolving jointly with aforesaid unwinder. Besides, proposed device comprises stabilising means to stabilise orientation created by said tensioning rolls as applied to strip cut in helix after withdrawal from the mandrel.

EFFECT: higher film stabilisation, particularly, that thin laminar plastics.

22 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of films from superhigh-molecular polyolefin. Proposed method comprises affecting initial superhigh-molecular polyolefin with weighted mean molecular weight of, at leas 500000 g/mol in the form of compacted powder by isobaric press. Besides, compacted polyolefin of rolling stage is subjected to definite processing. Also, it is stretched at such conditions whereat polymer processing temperature does no up to magnitude exceeding its fusion point at no point whatsoever.

EFFECT: high-quality films from superhigh-molecular polyolefin.

15 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of oriented polymer strips and their use in production of reinforced tubes. Proposed method satisfied the requirement (V2-V1)/L>0,22 s-1. Elongation is performed at temperature approximating to fusion point by, at least, three independent-drive drawing rolls. Axes of rotation of said rolls are perpendicular to polymer film translation. Rolls revolve in one direction at different tangential speeds V1, V2 and V3. Third drawing roll revolves at speed V3 exceeding that of second roll V2.

EFFECT: hardened structural integrity, higher drawing speeds, ruling out of film slippage.

7 cl, 1 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to device and method for manufacturing of film or fiber from reduced amount of polymer material. Invention is related to system of batch-off roll in device. Device comprises facility for melting and shaping of material composition in mold, facility for cooling of melted and molded material, facility for drawing of film or fiber, including the first and second drawing rolls. Device comprises facility for control of torsion torque in process of drawing to the minimum value of 1.510-3 Nm, in which rotation speed of every drawing roll with diametre from 35 to 100 mm may be established from 0.25 to 35 rpm. Speed of rotation is controlled by microstep method.

EFFECT: provision of possibility to use small-sized equipment, and also to use reduced amount of polymer material.

14 cl, 2 dwg, 3 ex

FIELD: mechanics.

SUBSTANCE: proposed device comprises one drive roller running at speed V1 and second drive roller running at speed V2. Note here that V1<V2 and rollers are arranged with a gap between them designed for stretching. The device intended for maintaining the sheet width clamps mechanically both film sheet edges areas. In stretching, the aforesaid gap width does not, in fact vary. Aforesaid device for maintaining the sheet width invariable comprises two pairs of supports. The proposed method of longitudinal film sheet stretching with the help of the above device consists in that the film is, first, directed over the low-speed roller, then, via the stretching gap to go over the high-speed roller. In stretching in the said stretching gap, both edges of the film are locked between the rollers of two pairs of supports. The proposed invention allows producing oriented film that features notable longitudinal shrinkage at increased temperature and does vary its crosswise sizes.

EFFECT: simple and efficient method.

31 cl, 14 dwg, 3 ex

FIELD: technological processes.

SUBSTANCE: invention is related to new, oriented morphologies and to special type of orientation in polymer alloy, and is used for film used for lamination with cross laying of layers, and for film used for manufacture of cord materials, materials from twisted or woven tape. Mixture of two partially incompatible polymers are extruded with provision of film provided that alloy in mixture contains fibrils that are mostly stretched in the same direction. At that width and thickness of every fibril is characterised by average value less than 5 mcm, at that fibrils are molded from polymer component that differs by higher melting temperature, and fibrils are surrounded by matrix of the second polymer, elasticity module of which is less. Special morphology is obtained by installation of grids in chamber with grids upstream outlet opening of extrusion nozzle, and afterwards hot stretching is realised at the temperature, when polymer with higher melt temperature is in at least partially crystalline condition, and by cold stretching, when both polymers are mostly in hard condition. The second stage of cold stretching is realised in conditions that result in relative extension at rupture at 20°C, which amounts to at least 25%.

EFFECT: possibility to produce film for laminates with cross laying of layers that are characterised by high resistance to impact loads.

97 cl, 24 dwg, 1 tbl, 1 ex

FIELD: chemical industry; methods of production of the nanoporous polymeric films with the open pores.

SUBSTANCE: the invention is pertaining to the field of production of the nanoporous polymeric films with the open pores. The films may be used in production of the porous polymeric membranes, the sorbents, the gas-permeable materials, molds for production of the nanocomposites, etc. the invention allows to increase by 10 times the porosity of the films at saving the nanometric dimension of the pores. The method of production of the nanoporous polymeric films with the open pores includes the stage of the single axis drawing in the contact with the adsorption-active medium. The subsequent stages include withdrawal of the adsorption-active medium from the films and the thermal treatment of the films, which are conducted in the conditions of keeping the films stretched in the direction of the drawing. At least, one of the stages of the method, such as the drawing, the withdrawal of the adsorption-active medium from the film and the thermal treatment of the film is exercised with the additional adjustment of the cross-sectional dimensions of the films.

EFFECT: the invention allows to increase by 10 times the porosity of the films at saving the nanometric dimension of the pores.

4 ex

The invention relates to a method for producing a multilayer polymeric material of high strength

The invention relates to a method and apparatus for stretching the laminate to a zero strain stretch, which is formed with a substantially unstressed conditions (t

The invention relates to a method and apparatus for consideration layered with zero deformation of the web, which is collected in a substantially unstrained condition that becomes elastic mechanical strain

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine. What is described is an absorbent product comprising an upper sheet, a lower sheet, an absorbent core between the upper sheet and the lower sheet, and a cyclodextrine complex containing cyclodextrine and at least three components bound to the cyclodextrine complex. The absorbent product has a total chromatographic peak area of the components released from the cyclodextrine complex into a closed space at the moment of time of 0 min is no more than approximately 0.50108, a total chromatographic peak area of the components released from the cyclodextrine complex into the closed space at the moment of time of 30 min is at least approximately 1.00108 and a total chromatographic peak area of the components released from the cyclodextrine complex into a closed space at the moment of time of 240 minutes is at least approximately 2.70108.

EFFECT: absorbent product provides the effective release of the components of the cyclodextrine complex to reduce a body fluid odour.

10 cl, 4 dwg, 3 tbl, 3 ex

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