Preparation method of white water-resistant and oil-proof paper

An oil-proof paper, white technology, applied in the field of papermaking, can solve the problems of poor thickness of high-strength paper, insufficient oil resistance of oil-proof paper, poor waterproof performance, etc. Effect

Active Publication Date: 2020-09-08
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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  • Preparation method of white water-resistant and oil-proof 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 provides a preparation method of white water-resistant and oil-proof paper so as to solve the problems of insufficient oil resistance and poor waterproof performance of the oil-proof paper. The preparation method comprises the steps: (1) preparing raw paper: mixing bleached chemical pulp, filler and cationic starch, dehydrating, squeezing and drying at a net part to obtain the raw paper; (2) coating for the first time: coating with a chitosan-culsageeite solution; (3) coating for the second time: coating with hydroxypropyl methylcellulose-silicon nano-particle coating liquid, and drying in sections; and (4) coating for the third time: coating with a polydimethylsiloxane solution dispersed by n-hexane. The double-proof paperhas extremely strong waterproof and oil-proof effects, and the surface of the double-proof paper is provided with multiple layers of liquid-proof coating layers and is provided with a compact internalstructure, so that the oil-proof paper is ensured to have high oil-proof grade, high density, good water resistance, low expansion 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 Applications(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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