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Method for increasing paper strength using collagenous fiber

A collagen fiber and paper strength technology, which is applied in the direction of adding reinforcing agents, can solve the problems of difficult surface enhancement of reinforcing agents, high production costs, and easy pollution, etc., and achieves simple and easy processing methods, low cost, and improved paper quality. intensity effect

Inactive Publication Date: 2005-02-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Paper-making strengthening agents usually use polymer chemicals such as modified starch, polyacrylamide, chitosan, resin, glue, etc., which are characterized by high production costs, difficult degradation, and easy pollution. special process required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Embodiment 1: at first the gray leather leftovers in the tanning solid waste are washed with water, degreased with the conventional degreasing agent OP-10 of gray skin weight 1%, cut into 2mm * 2mm fritters, add in the masher, pound Crumble for 2 minutes x 2 times, add 10% magnesia by weight of gray skin, dilute with 50 times the mass multiple of water, hydrolyze at 60°C for 2 hours, disperse with a homogenizer until there are no large particles in the hydrolyzed solution, and obtain collagen fibers Pulp; soak the needle (broad) wood pulp board for 4 hours, tear it into 25mm×25mm pulp sheets, disintegrate it in a beater for 15 minutes, and use a refiner to refine it to a beating degree of 35°SR to obtain wood pulp; The amount of dry pulp is calculated by mixing collagen fiber pulp with a mass percentage of 5% with wood pulp, hand-forming paper on a Kaiser paper sheet former, pressing for 5s x 2 times with a hydraulic press at 2MPa, and vacuum-drying at 105°C for 3 minute...

Embodiment 2

[0007] Embodiment 2: at first the gray leather leftovers in the tanning solid waste are washed with water, degreased with a conventional degreasing agent of 3% gray skin weight, cut into 5mm * 5mm fritters, added in a masher, and mashed 1 minute x 3 times, add 5% magnesia by weight of gray skin, dilute with 80 times the mass multiple of water alone, hydrolyze at 45°C for 2 hours, disperse with a homogenizer until there are no large particles in the hydrolyzed solution, and obtain collagen fiber slurry Soak the needle (broad) wood pulp board for 3 hours, tear it into 25mm × 25mm pulp sheets, disperse it in a beater for 25 minutes, and use a refiner to refine it to a beating degree of 38 ° SR to obtain wood pulp; The amount of pulp is calculated by mixing collagen fiber pulp with a mass percentage of 8% with wood pulp, hand-forming paper on a Kaiser sheet former, pressing 2s x 4 times with a hydraulic press at 4MPa, and vacuum-drying at 90°C for 5 minutes to obtain a sheet.

Embodiment 3

[0008] Embodiment 3: at first the gray hide leftovers in the tannery solid waste are washed with water, degreased with the conventional degreasing agent OP-10 of gray hide weight 5%, cut into the fritter of 2mm * 3mm, add in the masher, pound Crumble for 0.5 minutes x 4 times, add 8% magnesia by weight of gray skin, dilute with water with a mass multiple of 65 times, hydrolyze at 55°C for 2 hours, disperse with a homogenizer until there are no large particles in the hydrolyzed solution, and obtain collagen fibers Pulp: Soak the needle (broad) wood pulp board for 2 hours, tear it into 25mm×25mm pulp sheets, disperse it in a beater for 30 minutes, and use a refiner to refine it to a beating degree of 36°SR to obtain wood pulp; The amount of dry pulp is calculated by mixing collagen fiber pulp with a mass percentage of 10% with wood pulp, hand-forming paper on a Kaiser paper sheet former, pressing 4s×3 times under a hydraulic press at 3MPa, and vacuum-drying at 70°C for 4 minutes ...

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Abstract

Leather waste in leather solid-waste is washed, defatted by an ordinary degreasing agent then put and crushed in a pulping machine to be diluted with water hydrolyzed, and dispersed with homogenizer to small particles after adding MgO to get collagen fiber pulp. Soft wood or broad-leaved wood pulp plate is soaked and dispersed in a beater and ground to 35 deg. SR-40 deg SR beat degree to get wood pulp. 5%-10% total mass percentage of the collagen fiber pulp is mixed with the wood pulp according to bone-dry pulp to be formed by hand an a Kayser paper formation device, squeezed with a press and dried in vacuum under 70 deg.C-105 deg.C to get paper.

Description

technical field [0001] The invention relates to a method for increasing paper strength, in particular to a method for improving paper strength by utilizing collagen fibers extracted from tanning solid waste. Background technique [0002] At present, there are usually two ways to strengthen paper, one is to add dry and wet strength agents to the pulp, and the other is to add surface enhancers during papermaking. Paper-making strengthening agents usually use polymer chemicals such as modified starch, polyacrylamide, chitosan, resin, glue, etc., which are characterized by high production costs, difficult degradation, and easy pollution. A specialized process is required. Contents of the invention [0003] The purpose of the present invention is to provide a method for increasing paper strength by using collagen fibers, which can reduce the cost of paper reinforcement, can increase paper strength, and has no industrial pollution. [0004] In order to achieve the above object...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/18
Inventor 侯小东蔡祥章川波王志杰
Owner SHAANXI UNIV OF SCI & TECH
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