Ground papers used to manufacture tapes to cover joints between facing sheets

FIELD: construction.

SUBSTANCE: ground contains cation water-fast additive, alkaline glueing agent and anion activator in specified amount. Anion activator it contains is a component selected from group, including polyacrylate, sulfonate, carboxymethylcellulose and galactomannan hemicellulose. Ground paper has pH from approximately 7.0 to approximately 10, and strength of internal link from approximately 25 to approximately 350 millifeet per pound per square inch. This ground paper is produced by contact of a certain amount of cellulose fibres with water-fast additive, alkaline gluing agent and anion activator, serially and/or simultaneously.

EFFECT: improved physical properties of ground paper and expanded assortment of paper tapes to cover joints.

22 cl, 1 dwg, 1 ex

 

This application claims under 35 U.S.C. 119(e) of the priority of provisional patent application U.S. No. 60/652097 entitled "PAPER base USED FOR PRODUCTION of the TAPE TO overlap the JOINTS BETWEEN the FACING SHEETS, which filed February 11, 2005 and incorporated in full herein by reference.

The technical field

The present invention relates to paper products and/or bases, suitable for the manufacture of tape to overlap joints (also known as tape for gluing of seams and/or serpyanku)having a pH of at least 7.0 and contains a lot of cellulose fibers, a wet strength additive, an alkaline sizing agent and, optionally, anionic activator in them and/or on at least one surface of the tape, and/or applied at least on one surface of the tape and dispersed in the feed. The paper base is different its excellent physical properties, including tensile strength in the transverse direction, machine tensile strength, internal bond, tensile strength in the wet state, extensibility, wet, curl, adhesive properties, the adhesion of the tape to repair the seams with the connection interface, etc. Paper product of the present invention can be obtained by contact of a variety of cellulosic fibers with blahop the internal additive, alkaline sizing agent and/or anionic activator at any point in the paper manufacturing process. In addition, the present invention relates to methods of manufacturing and use of the paper base.

The level of technology

Wall panels made of various materials commonly used in the installation of interior walls in buildings. In particular, the inner walls of the buildings usually contain the load-bearing structure located at some distance from each other in parallel vertical elements (columns)that are used as a support for the finished panels (cladding), which are attached to the posts with screws, nails, adhesive or any other known means of attachment. It is obvious that between adjacent finished panels are the joints. To ensure continuous smooth surface of the wall it is necessary to seal the joint between adjacent panels. Usually, this "sealing" may be to overlay multiple layers of mastic material (connection interface), and the combination of the connection joint and the paper base, suitable for use as a tape to overlap joints, is applied to the surface of the panels for the formation of a desirable smooth wall surface. In addition, the tape overlap joints can be used for joining panels in the corner with the gross protective cover or without it.

To facilitate sealing of joints and/or angles most manufacturers cut longitudinal edges of the wall panels for the subsequent laying of mastic material with the purpose of equalizing the level of the front surface of the finished panel. Usually the process of deposition of the material in the joint is to apply the first layer of mastic, the imposition of the tape to overlap joint (e.g., paper) on the first layer and the cover tape by one or more, usually two, additional layers of mastic. This sealing of joints is time consuming, because usually, you must wait 24 hours before applying each layer of mastic to dry the applied layer before applying to it the next. Moreover, usually you then need to smooth out a skin area of the junction, to obtain a surface corresponding to the surface of the wall panels. Thus, the finishing process takes a lot of time and effort.

Paper tape to overlap the interface must have the appropriate properties, as in the narrow space of the work necessary to achieve the required tensile strength while maintaining other physical properties, such as properties clutch, link belt with connection interface, extensibility, wet, curl, etc. for Example, known methods of manufacturing paper bases suitable for use in l is ne for overlapping joints, require values of pH less than 7.0 and/or acid conditions. However, the increasing requirements for environmental protection require manufacturers of paper to provide an environment with a pH of not less than 7.0 and/or "alkaline" conditions. The challenge for the next generation of production bases for the tape to overlap joints is in programming is very specific and hard levels of physical properties, such as transverse tensile strength, machine tensile strength, internal bond, tensile strength in the wet state, extensibility, wet, curl, bonding properties, link belt with connection interface, etc. (which require converters and users of the paper fundamentals of tape to overlap joints), for the paper base tape before conversion and/or use. Such levels of physical properties mentioned above, is achieved in the known production of paper bases in acidic conditions. Currently paper-based, made in alkaline environments and suitable for the manufacture of tape to overlap joints (i.e. having acceptable physical properties, mentioned above), are difficult to obtain, which limits the supply chain such paper bases only a few paper industries, where the paper base produced in acidic conditions.

Despite it means the global efforts there is a need in the ribbon to overlap joints, which would correspond to the requirements of the construction industry in alkaline tape having desirable physical properties.

Brief description of the invention

One purpose of the present invention is a paper base containing a set of cellulose fibers, wet strength additive, an alkaline sizing agent and, optionally, anionic activator. One aspect of the present invention is to create a framework having a pH of from 7.0 to 14.0. Further, another aspect of the present invention is to create a framework that has the strength of internal connections from approximately 25 to 350 milliput on the psi, as measured according to the method TARR 541. An additional aspect of the present invention is a paper base having a basic weight of from 50 to 120 pounds/3000 square feet. Another aspect of the present invention is a paper base having an apparent density of from 5.0 to 20 pounds/3000 square feet at a thickness of 0.001 inch. Another aspect of the present invention is a paper base having a machine tensile strength of 25 to 100 pounds-force/inch width. In addition, the paper base of the present invention may have a transverse rupture strength of 5 to 50 pound-force/inch width. In addition, one aspect of the present invention is sanded paper basis. In addition, one aspect of the brew is his invention is polished or processed skin paper with the width of the butt from 1.5 to 3.25 inches. The present invention also relates to methods of manufacture and use of paper, especially when such methods include the production and use of bases in the ribbon to overlap joints.

Another objective of the present invention is a paper base having a pH of from 7.0 to 14.0, and contains a lot of cellulose fibers, a wet strength additive, an alkaline sizing agent and an anionic activator. One aspect of the present invention is a paper base having a basic weight of from 50 to 120 pounds/3000 square feet. Another aspect of the present invention is a paper base having an apparent density of from 5.0 to 20 pounds/3000 square feet at a thickness of 0.001 inch. Another aspect of the present invention is a paper base having a machine tensile strength of 25 to 100 pounds-force/inch width. In addition, the paper base of the present invention may have a transverse rupture strength of 5 to 50 pound-force/inch width. In addition, one aspect of the present invention is sanded paper basis. In addition, one aspect of the present invention is polished or processed skin paper with the width of the butt from 1.5 to 3.25 inches. The present invention also relates to methods of manufacture and use of paper, especially when t is such methods include the production and use of bases in the ribbon to overlap joints.

Brief description of drawings

The drawing is a block diagram showing a preferred method of making the paper base of the present invention with the selected entry points wet-strength additives, alkaline sizing agent and an anionic activator. Wet-strength additive, an alkaline sizing agent and an anionic activator is preferably added in any and/or all points in appendices a, b, C and/or D.

Detailed description of the invention

The authors present invention has created a base paper having a pH not less than 7,0, which up to now could not meet the strict requirements of the construction industry to the physical properties and methods of its manufacture and use.

The paper base of the present invention may contain recycled fiber and/or primary fiber. Secondary fibers differ from primary fibers that first passed the stage of drying at least once.

The paper base of the present invention may contain from 1 to 99 wt.% cellulose fibres by weight of the total basis, including 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 and 99 wt.% and including any and all ranges and subranges within these limits.

Preferred sources of cellulose fibers is wood of coniferous and/or deciduous. Paper present izaberete the Oia may contain from 50 to 100 wt.%, preferably from 80 to 95%, cellulose fibers of softwood from the total amount of cellulose fibers in a paper basis. This includes 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 and 100 wt.%, including all ranges and subranges within these limits, the total amount of cellulose fibers in a paper basis.

The paper base of the present invention may contain from 0 to 50 wt.%, preferably from 5 to 20 wt.%, cellulose fibers from hardwood from the total amount of cellulose fibers in a paper basis. This includes 0, 5, 10, 15, 20, 25, 30, 35, 40, 45 and 50 wt.%, including any and all ranges and subranges within these limits, the total amount of cellulose fibers in a paper basis.

In addition, the fibers of softwood and/or hardwood contained in a paper substrate of the present invention, can be modified by physical and/or chemical means. Examples of physical means include, without limitation electromagnetic and mechanical means. Tools electrical modification include, without limitation means providing contact of the fibers with the source of electromagnetic energy such as light and/or electric current. Means of mechanical modification include, without limitation means providing a contact of an inanimate object with the fibers. Examples of such inanimate PR is Ametov include items with sharp and/or blunt edges. Such means include, for example, tools cutting, mixing, grinding, tapping, etc.

Examples of chemical agents include, without limitation known chemical means of modification of the fibers. Examples of such modification fibers disclosed without restriction in the following patents: 6,592,717, 6,582,557, 6,579,415, 6,579,414, 6,506,282, 6,471,824, 6,361,651, 6,146,494, H1,704, 5,698,688, 5,698,074, 5,667,637, 5,662,773, 5,531,728, 5,443,899, 5,360,420, 5,266,250, 5,209,953, 5,160,789, 5,049,235, 4,986,882, 4,496,427, 4,431,481, 4,174,417, 4,166,894, 4,075,136 and 4,022,965, which are incorporated in full herein by reference.

The paper base of the present invention may contain at least one wet strength additive.

Wet-strength additive may be cationic, anionic, neutral and amphoteric. The preferred wet strength additive is a cationic and/or contains alkaline functional group. Examples of wet-strength additives can be, without limitation, polyaminoamide (AEO), urea-formaldehyde, melamine-formaldehyde and glyoxylate polyacrylamide resin. Further examples of wet-strength additives, which can be used in the present invention include, without limitation additives specified in the patents 6,355,137 and 6,171,440, which are incorporated in full herein by reference. The preferred wet strength additives include without limitation the value of polyaminoamide (AEO).

The paper base of the present invention may contain from 0.25 to 2.5 wt.% wet-strength additives by weight of the total base. This includes 0,25, 0,30, 0,35, 0,40, 0,45, 0,50, 0,6, 0,7, 0,8, 0,9, 1,0, 1,1, 1,2, 1,3, 1,4, 1,5, 1,6, 1,7, 1,8, 1,9, 2,0, 2,1, 2,2, 2,3, 2,4 and 2.5 wt.%, including any and all ranges and subranges within these limits.

The paper base of the present invention may contain at least one alkaline sizing agent. Examples of alkaline sizing agent can be, without limitation unsaturated hydrocarbon compounds, such as C6-C24preferably C18-C20and mixtures thereof.

Further examples of alkaline sizing agents that can be included in the present invention may be, without limitation, the agents disclosed in the following patents: 6,595,632, 6,512,146, 6,316,095, 6,273,997, 6,228,219, 6,165,321, 6,126,783, 6,033,526, 6,007,906, 5,766,417, 5,685,815, 5,527,430, 5,011,741, 4,710,422 and 4,184,914, which are incorporated in full herein by reference. Preferred alkaline sizing agent may be, without limitation dimer of alkylbetaine, dimer of alkenylamine and alkenyl-succinic anhydride. The paper base of the present invention may contain from 0.05 to 1.5 wt.% alkaline sizing agent by weight of the total base. This includes 0,05, 0,06, 0,07, 0,08, 0,09, 0,1, 0,2, 0,3, 0,4, 0,5, 0,6, 0,7, 0,8, 0,9, 1,0, 1,1, 1,2, 1,3, 1,4 and 1.5 wt.%, including any and all ranges and podiamos who are within these limits.

The paper base of the present invention may contain at least one anionic activator. Examples of anionic activator may be, but not limited to polyacrylates, sulfonates, carboxymethyl cellulose, galactomannan-hemicelluloses and polyacrylamides. Preferred anionic activators include, but not limited to polyacrylates, such as Nalco 64873.

The paper base of the present invention may contain from 0.05 to 1.5 wt.% anionic activator by weight of the total base. This includes 0,05, 0,06, 0,07, 0,08, 0,09, 0,1, 0,2, 0,3, 0,4, 0,5, 0,6, 0,7, 0,8, 0,9, 1,0, 1,1, 1,2, 1,3, 1,4 and 1.5 wt.%, including any and all ranges and subranges within these limits.

The paper base of the present invention can be machine tensile strength, measured by a known method TAPPI 494, from 25 to 100, preferably from 40 to 90 pounds-force/inch width. This includes machine tensile strength 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 and 100 pound-force/inch thickness, including any and all ranges and subranges within these limits.

The paper base of the present invention may have a transverse rupture strength, measured by a known method TAPPI 494, from 5 to 50, preferably from 20 to 50 pound-force/inch width, most preferably 25-40 lbs/inch width. This includes transverse tensile strength 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 pound-force/inch in width, including any and all ranges and pedeapsa what s in this range. The paper base of the present invention may have strength in the wet state, measured by a known method TAPPI 456, from 5 to 50, preferably from 10 to 25, most preferably from 15 to 25 pounds per inch width. This includes values 5, 10, 15, 20, 25, 30, 35, 40, 45 and 50 pounds per inch width, including any and all ranges and subranges within these limits.

The paper base of the present invention can have the strength of internal communication, known measured by TAPPI method 541, from 25 to 350, preferably from 50 to 250, most preferably from 100 to 200 milliput on the psi. This includes values 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 110, 125, 150, 175, 200, 225, 250, 275, 300, 325 and 350 milliput on the psi, including all ranges and subranges within these limits.

The paper base of the present invention may have a pH of not less than approximately 7,0 measured by any known method, for example a pH-marker, and known methods TAPPI 252 and 529 (check hot extraction and/or checking the pH of the surface). The pH value of the paper may be from approximately a 7.0 to 14.0, preferably from about 7.0 to 9.0, most preferably from about 7.1 to 8,5. This includes pH 7,0, 7,1, 7,2, 7,3, 7,4, 7,5, 7,6, 7,7, 7,8, 7,9, 8,0, 8,1, 8,2, 8,3, 8,4, 8,5, 8,6, 8,7, 8,8, 8,9, 9,0, 9,2, 9,4, 9,5, 9,6, 9,8, 10,0, 10,5, 11,0, 11,5, 12,0, 12,5, 13,0, 13,5 and 14.0, including any and all ranges and subranges within these pre is Elah.

The paper base of the present invention can be taken from the paper machine and to have a base weight of 50 lbs/3000 square feet to 120 pounds/3000 square feet, preferably from 70 to 120, and most preferably from 80 to 100 pounds/3000 square feet. Base weight basis may be 50, 52, 54, 55, 56, 58, 60, 62, 64, 65, 66, 68, 70, 72, 74, 75, 76, 78, 80, 82, 84, 85, 86, 88, 90, 92, 94, 95, 96, 98, 100, 105, 110, 115 and 120 pounds/3000 square feet, including any and all ranges and subranges within these limits.

The paper base of the present invention can be taken from the paper machine and to have an apparent density of from 5.0 to 20.0, preferably from 9.0 to 13.0, most preferably from 9.5 to 11.5 lb/3000 square feet per 0.001 inch thickness. The apparent density of the base can be 5,0, 5,2, 5,4, 5,5, 5,6, 5,8, 6,0, 6,2, 6,4, 6,5, 6,6, 6,8, 7,0, 7,2, 7,4, 7,5, 8,0, 8,5, 9,0, 9,5, 10,0, 10,5, 11,0, 11,5, 12,0, 12,5, 13,0, 13,5, 14,0, 14,5, 15,0, 15,5, 16,0, 16,5, 17,0, 17,5, 18,0, 18,5, 19,0, 19,5 and 20.0 lbs/3000 square feet per 0.001 inch thickness, including any and all ranges and subranges within these limits.

The paper base of the present invention may have a width with a spooling machine paper machine from 5 to 100 inches and may vary in length. The width of the paper base may be 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100 inches, including any and all ranges and subranges within these limits.

In addition, the paper base of the present invention may be Nar the curtain on the strip, which have a width of from 1.5 to 3.25 inches and may vary in length. Band width of the paper base may be 1,50, 1,60, 1,70, 1,75, 1,80, 1,85, 1,9, 1,95, 2,00, 2,10, 2,20, 2,30, 2,40, 2,50, 2,60, 2,70, 2,80, 2,90, 3,00, 3,05, 3,10, 3,15, 3,20 and 3.25 inches, including any and all ranges and subranges within these limits.

The paper base of the present invention may also contain binders and inert substances, including fillers, thickeners and preservatives. Other inert substances include, without limitation silica, such as colloidal silica and/or sols. Examples of silica include without limitation sodium silicate and/or borosilicate. Another example of inert substances are solvents, including, without limitation, water. Examples of fillers include, without limitation, calcium carbonate, hemihydrate calcium sulphate and dehydrate calcium sulphate. The preferred filler is calcium carbonate. Examples of binders include, without limitation polyvinyl alcohol. Amres (kemerovogo type), Bayer Parez, polychloride emulsion, modified starch, such as hydroxyethyloxy starch, starch, polyacrylamide, modified polyacrylamide, polyol esters, carbonyl product fitting polyol condensate of arandela/polyol, polyamide, epichlorohydrin, glyoxal, pixelmachine, ethandiol, aliphatic polyisocyanate, isocyanate, 1,6-hexamethylenebis is Anat, diisocyanate, polyisocyanate, polyester, polyester resin, polyacrylate, polyacrylate resin, acrylate and methacrylate.

The paper base of the present invention may contain from 0.001 to 20 wt.% inert substances by weight of the total bases, preferably from 0.01 to 10 wt. %, most preferably from 0.1 to 5.0 wt.%, each of the at least one inert substances. This includes 0,001, 0,002, 0,005, 0,006, 0,008, 0,01, 0,02, 0,03, 0,04, 0,05, 0,1, 0,2, 0,4, 0,5, 0,6, 0,7, 0,8, 0,9, 1, 2, 4, 5, 6, 8, 10, 12, 14, 15, 16, 18 and 20 wt.% from the total mass basis, including any and all ranges and subranges within these limits.

The paper base of the present invention may also contain starch from 0.05 wt.% up to 20 wt.% by weight of the total base. Mass fraction of starch in the basis can be 0,05, 0,1, 0,2, 0,4, 0,5, 0,6, 0,7, 0,8, 0,9, 1, 2, 4, 5, 6, 8, 10, 12, 14, 15, 16, 18 and 20 wt.% from the total mass basis, including any and all ranges and subranges within these limits.

The paper base may be produced by sequential and/or simultaneous contact of a set of cellulose fibers with a wet-strength additive, an alkaline sizing agent and an anionic activator. In addition, the contact may occur in an aqueous environment having a pH of from 7.0 to 14.0. The contact may occur at acceptable concentration levels, which will provide content in a paper substrate of the present invention any of the above if the EU ETS cellulose fibres, wet-strength additives, alkaline sizing agent, anionic activator, a filler, a binder, a thickening agent and plasticizer, in isolation or in any combination. The contact can occur at any time in the paper manufacturing process, including, without limitation, a concentrated wood pulp, diluted wood pulp, headbox, in the size press, the pool, the coating installation. Cellulose fibers, wet strength additive, an alkaline sizing agent, anionic activator can be introduced into contact sequentially and/or simultaneously in any combination with each other. Cellulose fibers, wet strength additive, an alkaline sizing agent, anionic activator can be pre-mixed in any combination before adding in the paper manufacturing process.

These methods of making the paper base of the present invention can be added to any known method of making paper, and the method of conversion, including abrasion, grinding, slitting, scoring, perforating, the formation of grooves, calendering, finishing the worksheet, converting, coating, laminating, printing, etc. Preferred known methods include methods that are adapted for the production of paper bases that can be used as a tape for re is rite joints. Manuals, such as those described in "Handbook for pulp and paper technologists" (Guide for technologists pulp and paper industry), G.A.Smook (1992), Angus Wilde Publications, describe such methods, and the Guide in full, incorporated herein by reference.

The present invention is explained in more detail using the following example of a variant of implementation, which is not intended to limit the scope of the present invention in any way.

Examples

EXAMPLE 1.

WAY

The method of manufacture of the product of the present invention shown in the drawing. The drawing is a block diagram of a particular method of making paper comprising the sequential and/or simultaneous addition of wet strength additive, an alkaline sizing agent, anionic activator to some multitude of cellulose fibers of softwood and hardwood in any one or more entry points, selected from a, b, C and/or D. the Data received on paper are listed in table 1. In the method of manufacturing paper used section of the pool for wood pulp, refining, mixing, molding sheet, drying, pressing, processing, sizing press, dried, calendering, rolling and coiling. This may follow any known methods of transformation for production, before occhialino tape to overlap joints.

Table 1.
The paper base, which is the product of the method described above and shown in the drawing
ComponentMass fraction in percent of the total weight of the paper base
Alkaline sizing agent0,1%
Wet-strength additive1%
Anionic activator0,25%
Inert substances8,65%
Cellulose fibre90% (of which 90% softwood and 10% hardwood from the total amount of cellulose fibers)

The term "range" is used herein as a brief indication of each value, which is included in this range, including all sub-ranges.

Numerous modifications and changes of the present invention are possible in light of the above description. It is therefore understood that within the scope of the attached claims, the invention may be implemented otherwise than specifically described in this document is the same.

All links and references referred to therein, are incorporated herein in respect of the relevant parts relating to the subject matter of the present invention and all variants of its implementation.

1. Paper basis for the tape to overlap joints containing
a lot of cellulose fibres;
cationic wet strength additive in an amount of from 0.25 to 2.5 wt.% from the total mass basis;
alkaline sizing agent in an amount of from 0.05 to 1.5 wt.% from the total mass basis;
anionic activator, which is at least one member of the group consisting of polyacrylate, sulfonate, carboxymethyl cellulose, galactomannan-hemicellulose in an amount of from 0.05 to 1.5 wt.% from the total mass of the framework, the paper weight is:
pH from about 7.0 to up to approximately 10.0 and
the strength of internal connections from approximately 25 to approximately 350 milliput on the psi, as measured by TAPPI method 541.

2. The paper base according to claim 1, having a basic weight of from 50 to 120 pounds/3000 sq. ft.

3. The paper base according to claim 1, having an apparent density of from 5.0 to 20 pounds/3000 square feet per 0.001 inch of thickness.

4. The paper base according to claim 1, having a machine tensile strength of 25 to 100 pounds-force/inch width.

5. The paper base according to claim 1, having a transverse tensile strength of 5 to 50 pound-force/inch width.

6. The paper is again according to claim 1, where at least mostly mentioned many cellulose fibers are fibers of softwood.

7. The paper base according to claim 1, additionally containing calcium carbonate.

8. The paper base according to claim 1 where the alkaline sizing agent is at least one member of the group consisting of a dimer of alkylbetaine, dimer of alkenylamine and alkenyl-succinic anhydride.

9. The paper base according to claim 1, additionally containing at least one member of the group consisting of binder, filler, thickener and preservative.

10. The paper base according to claim 1, where at least one surface of the above-mentioned foundations subjected to abrasion.

11. The paper base according to claim 1, where at least one surface of the above-mentioned foundations subjected to grinding.

12. The paper base according to claim 1. which is taken from the winding device of the paper machine with a width of from 15 to 100 inches.

13. The paper base according to claim 1, which is subjected to abrasion or grinding, and has a width of an end face from 1.5 to 3.25 inches.

14. The paper base according to claim 1, where the wet strength agent is at least one member of the group or combination of members of the group consisting of premineralization, urea-formaldehyde, melamine-formaldehyde and glyoxylate polyacrylamide resins.

15. The paper base according to claim 1, additionally containing calcium carbonate for men is her least in one form, selected from the group consisting of precipitated calcium carbonate and ground calcium carbonate.

16. The paper base according to claim 1 where the alkaline sizing agent is at least one unsaturated hydrocarbon having from 16 to 20 carbon atoms.

17. The paper base according to claim 1, additionally containing binder.

18. The method of making the paper base according to claim 1. contains the contact of a certain number of cellulose fibers with a wet-strength additive, an alkaline sizing agent and an anionic activator sequentially and/or simultaneously.

19. The method according to p, where a lot of cellulose fibers is brought into contact with a wet-strength additive, in an amount of from 0.25 to 1 wt.% by weight of the total bases, alkaline sizing agent in an amount of from 0.05 to 0.2 wt.% by weight of the total base, and with an anionic activator in an amount of from 0.05 to 0.2 wt.% by weight of the total base.

20. The method according to p, where the paper base has the strength of internal connections from approximately 70 to 200 milliput on the psi, machine tensile strength of 15 to 40 pound-force/inch width and a transverse tensile strength of 40 to 80 pounds-force/inch width.

21. The method according to p, additionally comprising grinding or abrasion of at least one side of the paper substrate after the above-mentioned contact.

22. Pic is b on p, where anionic activator is a polyacrylate.



 

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17 cl, 2 tbl, 3 ex

FIELD: paper; chemistry.

SUBSTANCE: method of cellulose fiber modification is realised in the following manner. Suspension mass of cellulose fibers is prepared. In process of its bleaching cellulose derivative is added in at least one stage of acid bleaching. pH of suspension mass is in the interval from approximately 1 to approximately 4, and temperature - in interval from approximately 30 to approximately 95°C. As cellulose derivative carboxy-alkyl-cellulose is used, for instance, carboxy-methyl-cellulose. From this suspension of bleached fiber mass paper is produced by means of dehydration of this suspension on the mesh with formation of paper.

EFFECT: higher strength in wet condition and softness of paper.

42 cl, 2 dwg, 1 ex

FIELD: polymer materials in paper-and-pulp industry.

SUBSTANCE: invention relates to manufacturing cellulose-polymer composites that can be, in particular, used in production paper or cardboard. Method according to invention providing a composition and manufacturing sheet therefrom followed by drying. In the method of invention, aqueous nanodispersion of polyorganosiloxanes is utilized, which can be introduced into composition or can be deposited onto sheet before drying on size press or after drying of sheet to moisture content not less than 12°.

EFFECT: improved waterproofness, increased inflammation temperature, and improved physicochemical characteristics of material.

4 cl

The invention relates to an agent that increases the strength of paper in the wet state, and the method of its production, and method for producing a paper containing this agent

The invention relates to mixtures of cationic starch with a cationic galactomannan gum, such as husarova gum, gum carob, fenugreek, Greek, etc. that can be used as a means that can help give strength and dehydration in the manufacture of paper

The invention relates to the pulp and paper industry, in particular the production of separator paper, which will find application in electrical industry for chemical current sources with an alkaline electrolyte

The invention relates to the pulp and paper industry

The invention relates to the production of multi-layer waterproof paper and can be used in the pulp and paper industry for paper production for the major layers of decorative paper laminate (DBSP)

The invention relates to the production of multi-layer paper and can be used in the pulp and paper industry for paper production for the major layers of decorative paper laminate

The invention relates to the pulp and paper industry, in particular to methods of producing paper for the inner layers of decorative paper laminates containing phenol-formaldehyde resin

FIELD: chemistry.

SUBSTANCE: substrate has a paper base containing cellulose fibre from deciduous wood with particle size smaller than 200 mcm after grinding in amount of not more than 45 wt % and average fibre length between 0.4 and 0.8 mm and filler in amount of 5-40 wt %, particularly 10-25 wt % in terms of the weight of cellulose.The substrate at least contains one polymer layer lying at least on one side of the paper base. There is a layer with a binding agent between the polymer layer and the paper base. The binding agent is a hydrophilic film-forming polymer made from hydroxypropylated starch and/or thermally modified starch. This layer may contain a pigment in form of calcium carbonate, kaolin, talc, titanium dioxide and/or barium sulphate.

EFFECT: reduced limpness and obtaining pure-bred production wastes.

27 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: adhesive contains a basic component in form of brewer's or distiller's yeast which is a waste from the brewing or distillation industry. The residue of brewer's or distiller's yeast is treated with 2% sodium hydroxide solution in ratio of 1:1. The adhesive composition contains the treated residue of brewer's yeast, glycerin and boric acid. Components of the composition are in the following ratio, pts. wt: residue of brewer's or distiller's yeast treated with 2% sodium hydroxide solution in ratio of 1:1 96.0-98.0; glycerin 1.9-3.7; boric acid 0.1-0.3.

EFFECT: adhesive composition has high adhesive capacity and low cost.

2 tbl

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