The method of manufacture of the paper base protective film finishing materials

 

(57) Abstract:

The invention relates to the technology of making paper-the basics and allows to increase its strength in dry and wet conditions, to reduce the fragility obtained on the basis of the protective film. Pulp grind before 18-23oSHR and the resulting mass is injected politicalintelligence resin in quantities of 0.5-1.0% of the mass of absolutely dry pulp. As cellulose is used or a mixture of bleached Kraft hardwood pulp content-cellulose 80-87% and bleached sulphate softwood pulp with the content of a-cellulose 85-91% at the ratio of 1:9 to 1.5:1, or a mixture of the specified bleached Kraft hardwood pulp and unbleached coniferous sulphate pulp at a ratio of 1:9 to 2:1 or unbleached coniferous sulphate pulp. 1 C.p. f-crystals, 1 table.

The invention relates to a process for the manufacture of base paper for the protective film, designed for use in the production of finishing materials, mainly decorative paper laminate.

A known method of manufacturing a base paper for a protective film of finishing materials, including the grinding of fibrous semi-finished product, the introduction of Lagoa use vysokoallergennyh bleached cellulose content of the pulp is not lower than 93% including bleached softwood with the content of a-cellulose 95-96% In particular, the authors offer a way of obtaining this paper from a mixture of bleached softwood pulp subjected to cold finishing (the content of a-cellulose 96,3%) and bleached prehydrolysis a-cellulose (95,5%). When the grinding is carried out in 2 stages to the final degree of grinding 32-40oSHR. As blagopoluchnaya additives used melamine-formaldehyde or politicalintelligence resin.

However, this method does not allow to obtain a base paper of the specified destination with the required strength in dry and wet conditions due to lower ability to sweathearting used fibrous semi-finished products.

The closest analogue is a method of manufacturing a base paper for a protective film of finishing materials, including the grinding of fibrous semi-finished product based on cellulose, introduction blagopoluchnaya supplements and reflux of the paper [2] In this way as a fibrous semi-finished product, a mixture of refined bleached pulp from coniferous wood content of a-cellulose of at least 95% and pulp from hardwoods, with the content of a-cellulose 95-98% Grinding cellulose lead to 25-30oSHR, and as Lagoona.

This known method does not allow to obtain a base paper with sufficient strength to waste impregnating it with an aqueous solution of the resin to the content of 150-400% of the Protective film obtained from this base paper has a significant fragility and preparing it for use (cutting, warehousing), and when it is used in the production of finishing materials a significant portion goes to waste (10%).

The technical result of the invention is to increase the strength of the base paper in dry and wet conditions and reduce fragility obtained on the basis of the protective film.

This technical result is achieved in that in the method of manufacturing a base paper for a protective film of finishing materials, including the grinding of fibrous semi-finished product based on cellulose, introduction blagopoluchnaya supplements and sheen of the paper web, as fibrous semi-finished products used or a mixture of bleached Kraft hardwood pulp with the content of a-cellulose 80-87% and bleached sulphate softwood pulp with the content of a-cellulose 85-91% or a mixture of the specified bleached Kraft hardwood pulp unbleached coniferous sulphate pulp unbleached or si sulphate hardwood pulp and bleached sulphate softwood pulp take at a ratio of 1.0:9,0-1,5:1,0, and the mixture of bleached Kraft hardwood pulp and unbleached coniferous sulphate pulp from 1:9 to 2:1, mainly 1:4. As blagopoluchnaya additives used melamine-formaldehyde or politicalintelligence resin, preferably the latter.

Using the proposed method the fibrous semi-finished products with relatively low value of a-cellulose and, consequently, with a high content of hemicellulose provides in the manufacture of paper in this way the formation of a strong and elastic structure of the paper web even at low degrees of grinding cellulose. The necessary capillary-porous structure and, therefore, set impregnating and strength properties of the paper are due to directional stateorprovince between hemicellulose and cellulose fibers, and the effect to the maximum extent manifested in the introduction to the song politicalintelligence resin. Introduction to pulp containing the specified cellulose with a degree of grinding 18-23oSHR, politicalintelligence resin ("Vadmin-115") increases the strength of the base paper, and also captures and strengthens capillary-porous structure, increasing its absorption IGNOU resin (ISF) - happens more uniform distribution of MFS in the structure of the paper web, which creates conditions for the formation of a uniform three-dimensional structure when merging resin with the participation of functional groups of cellulose politicalintelligence resin and ISF.

The method is as follows. Cellulose dissolve in the pulper and grind until 18-23oSHR, introducing mass "Vadmin-115" and cast the paper web. "Vadmin-115", you can enter in the pulp mass as before grinding, and directly before forming the paper web.

In the pulp can also be injected dyes and optical brighteners.

Example 1. Make the roll base paper weighing 40 g/m2. To do this, take 90% of bleached Kraft pulp from coniferous wood content of a-cellulose 85% and 10% of bleached Kraft hardwood pulp with the content of a-cellulose 86% i.e. in the ratio of 9.0:1, dissolve in the pulper and grind until 18oSHR. In the resulting mass is injected solution politicalintelligence resin brand "Vadmin-115" in the amount of 0.5% by weight of the absolutely dry fiber. The resin solution is injected directly before forming mass. Part example 1. Take 60% bleached Kraft hardwood pulp with the content of a-cellulose 87% and 40% bleached sulphate softwood pulp with the content of a-cellulose 91% i.e. at a ratio of 1.5:1, grind until 23oSHR injected resin "Vadmin-115" in the amount of 1.0% by weight of the absolutely dry fiber.

Example 3. Make the base paper as in example 1. The difference lies in the fact that as cellulose, a mixture of bleached Kraft hardwood pulp with the content of a-cellulose 80% unbleached coniferous sulphate pulp at a ratio of 1:4.

Example 4. Make the base paper as in example 1, but as cellulose used unbleached coniferous sulphate pulp and before forming into a mass of injected dye-soot in the amount of 7% by weight of the absolutely dry fiber.

Example 5. Make the base paper as in example 1, but as cellulose using 50% of bleached Kraft hardwood pulp with the content of a-cellulose 84% and 50% of bleached Kraft softwood pulp with the content of a-cellulose 87% refining lead to the 23oSHR and "Vadmin-115" enter in the amount of 0.7% by weight of the absolutely dry fiber.

Example 6 (the prototype). Make a paper-oellulose 95% and 50% bleached Kraft pulp from hardwood with the content of a-cellulose 95% and grind until 30oSHR. Before low tide in weight enter melamine-formaldehyde resin in an amount of 5% of absolutely dry resin from absolutely dry fiber.

The test results of the paper are given in the table. Then, the paper is processed in the protective film by impregnation of a melamine-formaldehyde resin to the weight of the binder 200% drying and cutting into sheets. This determines the amount of waste generated in the impregnated base paper and drying, cutting the obtained protective film on the leaves, storing them in the foot, the set of packages-billet for hot extrusion of plastic.

As can be seen from the data given in the table, the proposed method on the prototype allows to obtain a base paper with a higher strength in dry and wet conditions. This leads to the decline of marriage in the processing in the protective film by impregnation with an aqueous solution of melamine-formaldehyde resin and drying. In addition, the protective film obtained from this paper, is less fragile, which reduces the amount of waste when cutting, storage and the set of packages-billets for extrusion of plastic.

Thus the present invention enables achievement of the industrial equipment with the use of industrially produced fibrous semi-finished products and chemicals.

1. The method of manufacture of the paper base protective film of finishing materials, including the grinding of fibrous semi-finished product based on cellulose, introduction blagopoluchnaya supplements and sheen of the paper web, characterized in that the fibrous semi-finished product, a mixture of bleached Kraft hardwood pulp content-cellulose 80 - 87% and bleached sulphate softwood pulp with the content of a-cellulose 85 91% or a mixture of the specified bleached Kraft hardwood pulp unbleached coniferous sulphate pulp or unbleached coniferous sulphate pulp, and the grinding of fibrous semi-finished product is carried out to an 18 - 23oSHR.

2. The method according to p. 1, characterized in that the mixture of bleached Kraft hardwood pulp and bleached sulphate softwood pulp is used in a ratio of from 1.0: 9,0 to 1.5:1.0, and the mixture of bleached Kraft hardwood pulp and unbleached coniferous sulphate pulp at a ratio of from 1:9 to 2: 1.

 

Same patents:

The invention relates to the production of adhesive compositions used in the manufacture of materials with a layer of permanent stickiness, and can find application in the production of sticky tape on a paper basis

The invention relates to pulp and paper production and can be used for the manufacture of cardboard for thermal insulation, sole-cellulosic material, Shoe Board reduced thickness and other compositions using the pulp or asbestos fibers and a latex binder

Paper weight // 2042005
The invention relates to the pulp and paper industry, in particular the production of various packaging paper, cardboard, and fiberboard, and can be used mainly for the production of fluting and cardboard for flat layers of corrugated material

The invention relates to the pulp and paper industry

FIELD: chemical and pulp-and-paper industry.

SUBSTANCE: aqueous suspension of at least one filler or mineral contains natural carbonate, polymeric dispersing agent as stabilizer of suspension viscosity, product of natural carbonate treatment with gaseous CO2, and product of natural carbonate reaction with at least one medium or strong H3O+-donors, has pH more than 7.5 at 200C. As natural carbonate suspension contains calcium carbonate (e.g., marble, calcite, carbonate-containing dolomite, chalk, ore mixtures thereof with talcum, and/or TiO2, MgO, or other minerals inert to H3O+-donors). As H3O+-donors suspension contains H2SO3, HSO

-4
, H3PO4, oxalic acid or mixtures thereof in molar ratio to carbonate of 0.1-2. Used carbon dioxide under pressure of 0.05-5 bar may be added from outside, recycled or obtained by continuous H3O+-donors addition. Treatment with H3O+-donors and gaseous CO2 may be carriedout simultaneously or separately, wherein in the last case temperature and time of respective stages are 5-900C and 1-5 h. Claimed suspension is dried to obtain colorant. Colorant has BET specific surface of 5-200 m2/g according to ISO 9277 and mean grain size measured by sedimentation method of 0.1-50 mum. Colorants are used in compositions, as agent for paper lamination, for paper pulp filling, coloration, and board production. Obtained paper is useful in numeric and ink-jet printing.

EFFECT: paper with decreased mass at constant surface.

33 cl, 1 dwg, 2 tbl, 8 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: corn stems are reduced to fragment, boiled, ground, dispersed, flattened, and dried to produce paper sheets. Boiling is carried out for 1.5-4 h at ratio of aqueous solution of reagent to corn stem material between 3:1 and 6:1 and temperature 120-200°C.

EFFECT: achieved high quality of pulp, improved environmental condition, and reduced expenses.

5 cl, 2 tbl, 7 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: pulp for manufacturing mainly box-destination cardboard contains sulfite cellulose, wood-pulp, and secondary fiber. Sulfite cellulose is, more particularly, bisulfite cellulose bleached to 84-86% and having rigidity 30-35 Kappa units, tear resistance 430-460 mN, and punching resistance 430-460 mN. Such bisulfite cellulose is obtained by pulping mixture of softwood and foliferous wood at pH of cooking liquor 1.6-2.3, SO2 concentration 6.0-6.5%, and temperature 145-152°C. Wood-pulp is the one subjected to chemical, thermal, and mechanical treatment and characterized by whiteness 72-75%. Secondary fiber is ground paper waste with specified degree of grinding, optionally in the form of blend of differently ground marks.

EFFECT: improved strength characteristics and reduced manufacturing expenses.

4 cl, 1 tbl, 4 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: pulp for manufacturing mainly packaging cardboard contains sulfite cellulose, wood-pulp, and secondary fiber. Sulfite cellulose is, more particularly, bisulfite cellulose having rigidity 40-50 Kappa units, tear resistance 390-450 mN, and punching resistance 580-620 mN. Such bisulfite cellulose is obtained by pulping softwood at pH of cooking liquor 2.4-2.9, SO2 concentration 5.0-5.5%, and temperature 155-157°C. Wood-pulp is the one subjected to chemical, thermal, and mechanical treatment and characterized by whiteness 60-65%. Secondary fiber is ground paper waste with specified degree of grinding, optionally in the form of blend of differently ground marks.

EFFECT: improved strength characteristics and reduced manufacturing expenses.

4 cl, 1 tbl, 4 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: invention relates to production of pulps used in binder-based articles. Method of invention comprises repetitive soaking and washing of unbleached pulp in water, which is maintained in alkaline state at elevated temperature to obtain cellulose product characterized by chemical oxygen demand not above 2.0 kg per 10 kg dry cellulose.

EFFECT: improved strength characteristics of products.

14 cl, 1 dwg, 2 ex

FIELD: fungicides.

SUBSTANCE: invention proposes use of strobilurines as fungicidal agents designed to be applied in the form of dispersions in industrial process water and in the form of pulp both used in paper industry. Application areas include preservation of wet sheet, protection against mildew, in particular protection of paper products, or other areas wherein fungicidal or mildew-controlling agents are required. Water systems, which can be treated with strobilurines include papermaking machine systems, fibrous intermediate and paper systems, cooling towers, and heat-exchangers.

EFFECT: increased availability, reduced toxicity, and avoided involvement of volatile and inflammable organic solvents.

38 cl, 2 tbl, 4 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: invention relates to unbleached pulps, which are used in binder-based cellulose products, which are kraft pulp products. Cellulose product is maintained under alkali conditions during washing operation since initial soaking phase to cellulose drying step and exhibits chemical oxygen demand not higher than 2.0 kg per 1000 kg dry cellulose.

EFFECT: increased strength characteristics of product.

11 cl, 1 dwg, 2 ex

FIELD: polymer materials and papermaking industry.

SUBSTANCE: invention relates to aqueous silicon-containing composition containing anionic organic polymer comprising at least one aromatic group and silica-based anionic particles in aggregated form or microgel form. Anionic organic polymer, in particular, contains at least one aromatic group and silica-based anionic particles in amount at least 0.01% of the total mass of composition. Composition contains essentially no sizing substance capable of reacting with cellulose, whereas anionic organic polymer containing at least one aromatic group is not naphthalenesulfonate-formaldehyde condensate. Invention also relates to methods for preparing the composition and to utilization thereof as a substance providing dehydration and retention in paper making process. Invention further relates to a paper making process using aqueous suspension containing cellulose fibers and optionally filler, wherein aqueous silicon-containing composition and at least one charged organic polymer are added to pulp.

EFFECT: improved dehydration and/or retention in paper making process and increased storage stability.

20 cl, 4 tbl, 4 ex

FIELD: pulp-and-paper and food-processing industry.

SUBSTANCE: fibrous product contains grain-based fibrous material treated with acid and having full coefficient of cellulose of at least 50% and coefficient of hemi-cellulose of at least 5%. Described are fibrous product used for obtaining preferably paper products, food products, food mixture with additive based on fibrous product, method for treating of grain-based fiber, and methods for manufacturing paper and food product.

EFFECT: increased strength of paper without increasing of main weight, increased functional properties, improved structure, coagulation and taste of food product obtained with the use of grain-based fibrous material.

36 cl, 31 dwg, 10 tbl, 20 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: cellulose product contains clay having stacking of atomic planes 2R2. Product represents paper of fibrous pulp, while clay has cationic nature. Preparation of product comprises: providing aqueous suspension containing cellulose fibers and optionally filler; adding clay having stacking of atomic planes 2R2.to suspension; and dehydrating thus prepared suspension. Another method of preparing cellulose product comprises: providing aqueous suspension containing cellulose fibers and optionally filler; adding cationic clay to suspension; adding one or several draining auxiliary substances enhancing retention of filler and containing at least one cationic polymer; and dehydrating thus prepared suspension.

EFFECT: reduced interfering and harmful substance in cellulose suspension and enhanced retention of filler, dehydrating agents, and sizing agents.

27 cl, 14 tbl, 13 ex

FIELD: textile; paper.

SUBSTANCE: method consists of adding to the paper sheets approximately 0.05 pounds/ton to 15 pounds/ton, in accordance with the dry fibers, one or several polymers, functioning as aldehyde, containing amino or amido group, where, at least, 15 molar percent amino or amido group function with one or several aldehydes and where the functionaling aldehyde polymers have a molecular weight of not less than approximately 100000.

EFFECT: increased activity for drying due to a reduction in the amount of polymer.

14 cl, 5 ex

FIELD: textile, paper.

SUBSTANCE: according to one version, method includes provision of aqueous suspension that contains cellulose fibres. Addition of cation polysaccharide and polymer P2, which is an anion polymer, to produced suspension after all points of high polymer P1 shearing force, and P1 polymer is an anion polymer. Then water is removed from produced suspension to form paper. According to the other version, auxiliary agents are added for drainage and retention to produced suspension of cellulose fibres after all points of high shearing force. The latter are represented by a cation polysaccharide and polymer P2, being an anion polymer.

EFFECT: improved drainage without deterioration in retention and forming of paper, increased speed of paper-making machine and application of lower doses of polymer.

34 cl, 5 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to compositions of aldehyde-functionalised polymers, which are stabilised with inorganic salts, organic additives or combinations thereof, and to a method of prolonging the shelf life of the composition. Stabilising additives can be added to aldehyde-functionalised polymers until a stabilised aldehyde-functionalised polymer composition is formed at any stage of the functionalisation reaction. The composition contains one or more aldehyde-functionalised polymers with weight-average molecular weight of at least about 50000 g/mol. At least one stabilising additive contains as an inorganic salt alkali or alkali-earth metal salts, hydrates thereof and any combination thereof. The used organic additive can be diols, triols, polyols, glycerine, ethylene glycol, saccharides, urea and any combination thereof.

EFFECT: described is a method of producing a material having cellulose fibres, and use of the composition for producing cellulose fibre products in the papermaking process.

16 cl, 7 dwg, 2 tbl, 8 ex

FIELD: pulp and paper industry.

SUBSTANCE: invention relates to pulp and paper industry and relates to paper and a production method thereof. Paper is made by treatment of aqueous suspension of fibrous mass with a resin of functionalised aldehyde polymer and polyamidodiamino-epichlorohydrin resin. polyamidodiamino-epichlorohydrin resin is obtained via by first reacting epichlorohydrin with polyamidoamine to form aminochlorohydrin, which is then converted to azetidine, and obtained polyamidodiamino-epichlorohydrin resin has molar content ratio of epichlorohydrin to amine molar content of about 0.01 to 0.4, and obtained polyamidodiamino-epichlorohydrin resin has azetidine content of approximately 40 % or less.

EFFECT: invention provides paper with improved strength.

13 cl, 1 dwg, 7 tbl, 12 ex

Up!