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A kind of oil-resistant coated white cardboard and its production process

A technology of cloth white cardboard and production process, applied in the field of papermaking, can solve problems such as hidden dangers and contaminate food safety, and achieve the effects of high oil resistance, reduced production cost and easy realization.

Active Publication Date: 2016-09-07
ZHUHAI S E Z HONGTA RENHENG PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Paper contains fluorocarbons, and fluorocarbons may contain PFOA (Perfluorooctanoic Acid; perfluorooctanoic acid ammonium), PFOS (perfluorooctanesulphonate, perfluorooctane sulfonate), etc., which are material components that have been listed in the European Union's catalog of safe prohibited ingredients , so the use of this kind of oil-proof packaging paper for food packaging has the potential safety hazard of contaminating food

Method used

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  • A kind of oil-resistant coated white cardboard and its production process
  • A kind of oil-resistant coated white cardboard and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Surface layer pulp: wood pulp (percentage by weight: 80% bleached hardwood kraft pulp, 20% bleached softwood kraft pulp), crushed and mixed by a pulper, refined by a disc refiner, and enter the surface of the paper machine net filter.

[0057] Core layer pulp: wood pulp (weight percentage: 70% bleached chemical thermomechanical pulp, 30% broken paper), crushed and mixed by a pulper, refined by a disc refiner, and filtered into the paper machine core net.

[0058] Bottom pulp: wood pulp (percentage by weight: 75% bleached hardwood kraft pulp, 25% bleached softwood kraft pulp), disintegrated and mixed by a pulper, refined by a disc refiner, and enter the surface wire of the paper machine filter.

[0059] Then, a three-layer laminated wire is formed by a paper machine to produce a wet paper sheet with a surface layer 103, a core layer 102 and a bottom layer 101. The wet paper sheet is dried by a paper machine and the surface is sized to obtain a base paper.

[0060] Then...

Embodiment 2

[0068] The production process of this embodiment is the same as that of the above-mentioned embodiment 1, the difference lies in: the slurry ratio of the surface layer slurry, the core layer slurry, and the bottom layer slurry, and the coating ratio of the back-coated oil-proof layer.

[0069] Surface layer size (percentage by weight): 95% of bleached hardwood kraft pulp, 5% of bleached softwood kraft pulp;

[0070] Core layer pulp (percentage by weight): bleached chemical thermomechanical pulp 65%, broken paper 35%;

[0071] Bottom pulp (percentage by weight): 85% of bleached hardwood kraft pulp, 15% of bleached softwood kraft pulp;

[0072] The coating ratio of the back-coated oil-proof layer is (parts by weight): 100 parts of pigment are mixed with calcium carbonate and china clay, 50 parts of calcium carbonate and china clay, 75 parts of latex, 0.6 part of carboxymethyl cellulose, and 0.12 part of dispersant , 1 part of anti-water agent, 1.2 parts of lubricant, 0.035 part...

Embodiment 3

[0078] Surface layer size (percentage by weight): 90% of bleached hardwood kraft pulp, 10% of bleached softwood kraft pulp;

[0079] Core layer pulp (percentage by weight): bleached chemical thermomechanical pulp 75%, broken paper 25%;

[0080] Bottom pulp (percentage by weight): 80% of bleached hardwood kraft pulp, 20% of bleached softwood kraft pulp;

[0081] The coating ratio of the back-coated oil-repellent layer is (parts by weight): 100 parts of pigments are all composed of china clay, that is, 100 parts of china clay, 100 parts of latex, 0.3 part of carboxymethyl cellulose, 0.08 part of dispersant, and 0.7 part of water repellent part, 0.8 part of lubricant, 0.035 part of defoamer, 0.12 part of caustic soda, and 0.18 part of fungicide.

[0082] The coating amounts of the precoat layer 104, the core coat layer 105, and the top coat layer 106 were 9 g / m2, 11 g / m2, and 11 g / m2, respectively.

[0083] The produced oil-proof coated white cardboard is compared with the same...

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Abstract

The invention provides an oil-proof coating white cardboard, which comprises a raw paper and a coating layer, wherein the raw paper comprises a surface layer, a core layer and a bottom layer, the coating layer comprises a pre-coating layer, a core coating layer, a surface coating layer and a back coating oil-proof layer, coating compositions of the back coating oil-proof layer comprise 100 parts of pigment, from 50 to 100 parts of latex, from 0 to 50 parts of oil-proof starch, from 0.1-0.6 part of carboxymethyl cellulose, from 0.05 to 0.12 part of dispersing agent, from 0.3 to 1.0 part of water-resistant agent, from 0.3 to 1.2 parts of lubricating agent, 0.0.35 part of antifoaming agent, from 0.05 to 0.2 part of caustic soda and from 0.05 to 0.3 part of bactericide. Oil-proof coating which is used by papers does not use fluorocarbon, thereby avoiding existence of pollution sources such as PFOA and PFOS and the like, and eliminating potential safety hazard that packing papers pollute food. Simultaneously, the oil-proof coating white cardboard is high in oil-proof grade and simple in process, reduces production cost of papers compared with the traditional technology which uses the fluorocarbon, and has excellent economic benefit.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to an oil-proof coated white cardboard and a production process thereof. Background technique [0002] At present, the oil-proof packaging paper sold on the market is generally produced by the following two production processes: one is to add fluorocarbons to the pulp to make the base paper have oil-proof and grease-proof properties; the other is to use surface sizing , back-coating and other methods are applied on the base paper, and the finished paper has oil and grease resistance through the coating layer containing fluorocarbons. Paper contains fluorocarbons, and fluorocarbons may contain PFOA (Perfluorooctanoic Acid; perfluorooctanoic acid ammonium), PFOS (perfluorooctanesulphonate, perfluorooctane sulfonate), etc., which are material components that have been listed in the European Union's catalog of safe prohibited ingredients Therefore, the use of such oil-proof wrappin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/84D21H19/82D21H19/40D21H19/54D21H19/52D21H19/44D21H19/64D21H21/36D21H21/14D21H11/04D21H11/08D21F11/00
Inventor 季向东仇如全孙世琼卢诗强杨丽余军生
Owner ZHUHAI S E Z HONGTA RENHENG PAPER
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