A kind of preparation method of white waterproof and greaseproof paper

A greaseproof paper, white technology, applied in the field of papermaking, can solve the problems of poor banner thickness of high-strength paper, insufficient greaseproof paper, poor waterproof performance, etc., to achieve surface energy reduction, increase the difficulty of wetting, and good water resistance Effect

Active Publication Date: 2022-02-08
XIANHE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of insufficient oil-proof and poor waterproof performance of oil-proof paper, the present invention provides a preparation method of white water-proof and oil-proof paper. Liquid coating, with a dense inner structure, ensures that the oil-proof paper has a high oil-proof grade, high density, good water resistance, low stretch rate, high strength and small paper width difference

Method used

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  • A kind of preparation method of white waterproof and greaseproof paper
  • A kind of preparation method of white waterproof and greaseproof paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of white water-resistant and oil-proof paper, comprising the following steps:

[0038] (1) Preparation of base paper: after 60% bleached softwood pulp and 40% bleached hardwood pulp are chemically soaked, beating to 65 ° SR; get 45 parts by weight of bleached chemical pulp, 5 parts by weight of filler talcum powder and 5 parts by weight After the cationic starch is mixed, the wire part is dehydrated, squeezed and dried to obtain base paper; the chemical pulp soaking time of the bleached slurry is 4h; the squeezing condition is 450kPa, 10-15min;

[0039] (2) Coating for the first time: Chitosan-vermiculite solution is coated on the base paper of step (1) gained, coating amount is 3g / m 2 The preparation step of described chitosan cellulose-vermiculite solution comprises: chitosan cellulose is added in the glacial acetic acid solution that the pH value of deployment is 3.5, stirs until chitosan cellulose dissolves completely, nanometer Grade vermiculi...

Embodiment 2

[0045] The difference with Example 1 is that a preparation method of white water-resistant and grease-proof paper comprises the following steps:

[0046] (1) Preparation of base paper: after chemical soaking of 55% bleached softwood pulp and 45% bleached hardwood pulp, beating to 70 ° SR; get 50 parts by weight of bleached chemical pulp, 6 parts by weight of filler calcium carbonate and 6 parts by weight After the cationic starch is mixed, the wire part is dehydrated, squeezed and dried to obtain base paper; the chemical pulp soaking time of the bleached slurry is 4.5h; the squeezing condition is 480kPa, 11min;

[0047] (2) Coating for the first time: Chitosan-vermiculite solution is coated on the base paper of step (1) gained, coating amount is 5g / m 2 The preparation step of described chitosan cellulose-vermiculite solution comprises: chitosan cellulose is added in the glacial acetic acid solution that the pH value of deployment is 3.8, stirs until chitosan cellulose dissolve...

Embodiment 3

[0053] The difference with Example 1 is that a preparation method of white water-resistant and grease-proof paper comprises the following steps:

[0054] (1) Preparation of base paper: after chemical soaking of 50% bleached softwood pulp and 50% bleached hardwood pulp, beating to 72 ° SR; get 60 parts by weight of bleached chemical pulp, 7 parts by weight of filler titanium dioxide and 7 parts by weight of After the cationic starch is mixed, the wire part is dehydrated, squeezed, and dried to obtain base paper; the chemical pulp soaking time of the bleached slurry is 5h; the pressing condition is 520kPa, 13min;

[0055] (2) Coating for the first time: Chitosan-vermiculite solution is coated on the base paper of step (1) gained, coating amount is 8g / m 2 The preparation step of described chitosan cellulose-vermiculite solution comprises: chitosan cellulose is added in the glacial acetic acid solution that the pH value of deployment is 4, stirs until chitosan cellulose dissolves ...

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Abstract

The invention relates to the technical field of papermaking, and aims at the problems of insufficient oil-proof and poor waterproof performance of oil-proof paper, and proposes a preparation method of white water-resistant and oil-proof paper. Including: (1) Preparation of base paper: mixing bleached chemical pulp, filler and cationic starch, dehydration, pressing, and drying in the wire section to obtain raw paper; (2) First coating: coating chitosan-vermiculite solution; ( 3) The second coating: coating hydroxypropyl methylcellulose-silicon nanoparticle coating solution, and drying in sections; (4) The third coating: coating polydimethylsiloxane dispersed in n-hexane alkane solution. The double-proof paper has a strong waterproof and oil-proof effect. Its surface has a multi-layer liquid-proof coating and a dense internal structure, which ensures that the oil-proof paper has a high oil-proof grade, high density, and good water resistance. Low stretch rate, high strength and small paper banner thickness difference.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a preparation method of white water-resistant and grease-proof paper. Background technique [0002] Oil-proof paper refers to the paper that can prevent oil absorption and penetration. It has a certain strength and high smoothness, but its air permeability is low. It can resist oil penetration and oil penetration by adding oil-repellent in the pulp or coating the surface. The absorbent paper is widely used in the packaging of hamburgers, chicken wings, French fries and other food and other oily items. In daily life, we often need to pack oily substances. The materials used to pack these substances must have good water and oil repellency. In addition to water and oil repellency, increasing the filling density of paper, that is, whiteness, is also of great significance to prevent liquid from penetrating. . [0003] The common preparation method is to compound a layer of conti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H11/02D21H17/29D21H21/52D21H21/16D21H17/68D21H19/82D21H19/84D21H19/40D21H19/52D21H19/14D21H21/14D21H19/32D21H19/38D21H19/44C01B33/145B82Y40/00
CPCD21H27/00D21H11/02D21H17/29D21H21/52D21H21/16D21H17/68D21H19/82D21H19/84D21H19/40D21H19/52D21H19/14D21H21/14D21H19/32D21H19/38D21H19/44C01B33/145B82Y40/00
Inventor 王敏良周晓光骆华英刘祥波冯强张美娟
Owner XIANHE CO LTD
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