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High water resistance straw lining paper and preparation method thereof

A water-based, straw-based technology, applied in the field of papermaking, can solve problems such as refractory degradation and environmental pollution, and achieve the effects of blocking diffusion, short curing time, and reducing false sizing

Inactive Publication Date: 2019-03-19
ZHEJIANG HENGDA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polystyrene, polypropylene, polyvinyl chloride and other plastic products are difficult to degrade after being used and discarded, causing serious pollution to the environment

Method used

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  • High water resistance straw lining paper and preparation method thereof

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preparation example Construction

[0024] A preparation method of highly water-resistant straw backing paper, comprising the following steps:

[0025] Step 1: Mix and pulp the bleached softwood pulp and bleached hardwood pulp, pump the pulp to the pulp tank after disc grinding and beating, add the filler suspension and mix evenly, then pump it to the pulp tank, add cationic starch, wet After the strong agent is mixed evenly, it is pumped to the milling pool. After the slurry is thickened and slag removed, the sizing agent and multi-component retention aid are added and then enters the headbox;

[0026] Bleached coniferous wood pulp and bleached hardwood pulp are mixed according to the ratio of (3:7)~(6:4), the soaking time before beating is 4~6h, the beating concentration is 4.0~4.7%, and the beating degree is 35~40°SR ;

[0027] The filler suspension is mixed with one or more of calcium carbonate, talcum powder, kaolin and titanium dioxide in any ratio, the concentration of the suspension is 8-12%, and the fi...

Embodiment 1

[0038]Step 1, mix bleached softwood pulp and bleached hardwood pulp in a ratio of 3:7, and then grind and beat. The soaking time before beating is 4 hours, the beating concentration is 4.0%, and the beating degree is 35°SR. Finally, the slurry is pumped to the slurry tank; add calcium carbonate filler suspension, the suspension concentration is 8%, and the filling amount is 15%, and after mixing evenly, pump it to the slurry tank; add cationic starch 0.3% (for absolute dry fiber consumption), polyamide epichlorohydrin 0.4% (to the absolute dry fiber consumption), pumped to the papermaking pool after mixing evenly; after the slurry was thickened and slag removed, alkenyl succinic anhydride ( ASA) emulsion, the consumption is 0.4% (to the absolute dry fiber consumption); ASA emulsion field emulsification step is to adjust the pH to 4 with citric acid after starch gelatinization, mix with ASA after cooling to 40 ℃, use high-shear turbine Pump emulsification makes sizing agent emu...

Embodiment 2

[0042] Step 1: Mix bleached coniferous wood pulp and bleached hardwood pulp in a ratio of 4:6, and then grind and beat. The soaking time before beating is 5 hours, the beating concentration is 4.5%, and the beating degree is 38°SR. Finally, the slurry is pumped to the slurry tank; add kaolin and titanium dioxide 3:1 filler suspension, the suspension concentration is 8%, and the filling amount is 18%, mix well and then pump to the slurry tank; add cationic starch 0.5% (Amount for absolute dry fiber), polyamide epichlorohydrin 0.5% (Amount for absolute dry fiber), mix evenly and pump to the papermaking pool; After the slurry is thickened and slag removed, it is continuously added at the exit of a good pulp Alkenyl succinic anhydride (ASA) emulsion, the dosage is 0.2% (for absolute dry fiber); the on-site emulsification step of ASA emulsion is to adjust the pH to 4.5 with citric acid after starch gelatinization, and mix it with ASA after cooling to 43°C. The sizing agent emulsion...

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Abstract

Th einvention discloses high water resistance straw lining paper and a preparation method thereof. The preparation method comprises the following steps: (1) mixing and pulping bleaching injection andhardwood pulp, adding filler, a wet strength agent, a sizing agent, retention aid and the like, and preparing fiber pulp which can be put on a net through slag removing and concentration regulating; (2) forming and squeezing the fiber pulp with a fourdrinier machine, controlling the curve of a dryer to completely cure the sizing agent, performing a surface sizing process with a three-element surface sizing agent of starch with alkyl ketene dimer and carboxymethylcellulose; and preparing the high water resistance straw lining paper through drying, press polishing and rolling. The straw lining paper has good water resistance and wet strength and can be used for effectively prevent liquid infiltration, and each index can accord with the safety standard of national food package materials.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a highly water-resistant straw backing paper and a preparation method thereof. Background technique [0002] With the improvement of economic level and quality of life, food packaging materials are widely used in commodities, which also brings about the increasingly serious problem of white pollution. Polystyrene, polypropylene, polyvinyl chloride and other plastic products are difficult to degrade after being discarded, causing serious pollution to the environment. With the implementation of the national ban on plastics, plastic tableware is gradually eliminated by the market. Paper materials are an excellent substitute for plastics due to their recyclable and degradable advantages. In recent years, it has gradually seized the food packaging market and has a broad prospect. [0003] Plastic has always been the main material for straws due to its good plasticity and thermos...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21F11/00D21H21/16D21H21/20
CPCD21F11/00D21H21/16D21H21/20D21H27/00
Inventor 伊财富徐冰程亚洲杨菊红廖寿华
Owner ZHEJIANG HENGDA NEW MATERIAL CO LTD
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