Mildew-proof and fresh-keeping paperboard and preparation method thereof

A kind of cardboard and anti-mildew technology, used in paper, papermaking, paper coating and other directions, can solve the problems of uneven surface of the substrate, large pores, coating breakage and so on

Inactive Publication Date: 2018-07-06
CHANGDE JINDE NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, the fibers on the back of the cardboard are rough and the pores are large,

Method used

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  • Mildew-proof and fresh-keeping paperboard and preparation method thereof

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[0039] The present invention also provides a method for preparing the above-mentioned mildew-proof and fresh-keeping cardboard in an embodiment, comprising the following steps:

[0040] Step S1: Mix the raw materials of the barrier coating to prepare a barrier coating; mix the raw materials of the anti-mold and fresh-keeping layer to prepare the anti-mold and fresh-keeping coating.

[0041]Step S2: forming a surface decoration layer on the front of the cardboard base layer, coating a barrier coating on the back of the cardboard base layer, and drying to form a barrier coating.

[0042] Preferably, the coating amount of the barrier coating is 1 to 10 g / m 2 , so as to control the thickness of the barrier coating to be 0.5-10 μm.

[0043] Preferably, the drying condition is to treat at 80-120° C. for 5-10 seconds. Preferably, the drying conditions are sequentially treating at 80-85°C, 90-100°C, 105-120°C, 90-100°C and 80-85°C for 1-2s respectively. More preferably, the drying ...

Embodiment 1

[0051] Mix 60 parts of polyurethane graft-modified PVDC emulsion, 12 parts of acrylate copolymer, 5 parts of water and 8 parts of isothiazolinone to prepare a barrier coating. Wherein, the acrylate copolymer is methyl methacrylate-butyl acrylate-acrylic acid-N-methylol acrylamide copolymer.

[0052] Mix 30 parts of ethylene-vinyl acetate copolymer with a degree of hydrolysis of 40%, 35 parts of acrylic ester copolymer, 8 parts of calcium propionate and 8 parts of water to prepare an anti-mold and fresh-keeping coating. Wherein, the acrylic ester copolymer is a methyl methacrylate-butyl acrylate-acrylic acid copolymer and a methyl methacrylate-butyl acrylate-acrylic acid-N-methylol acrylamide copolymer with a mass ratio of 1.

[0053] Form a surface decoration layer on the front of the cardboard base layer, according to 10g / m 2 The coating amount of the barrier coating is applied to the back of the cardboard base layer, and then dried at 80°C, 90°C, 120°C, 100°C and 85°C for 1...

Embodiment 2

[0056] Embodiment 2 is basically the same as Embodiment 1, and the difference is that the preparation raw materials and coating process parameters of the barrier coating and the anti-mildew fresh-keeping coating are as follows:

[0057] Mix 65 parts of polyurethane graft-modified PVDC emulsion, 15 parts of acrylate copolymer, 8 parts of water and 5 parts of isothiazolinone to prepare a barrier coating.

[0058] Mix 35 parts of ethylene-vinyl acetate copolymer with a degree of hydrolysis of 65%, 30 parts of acrylic ester copolymer, 10 parts of calcium propionate and 10 parts of water to prepare an anti-mold and fresh-keeping coating. Among them, the acrylate copolymer of the anti-mold fresh-keeping coating is methyl methacrylate-butyl acrylate-acrylic acid copolymer and methyl methacrylate-butyl acrylate-acrylic acid-N-methylol with a mass ratio of 1:2. base acrylamide copolymer.

[0059] The coating amount of barrier coating and anti-mildew fresh-keeping coating is 1g / m 2 , ...

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Abstract

The invention discloses a mildew-proof and fresh-keeping paperboard and a preparation method thereof. The mildew-proof and fresh-keeping paperboard comprises a paperboard base layer, a surface decorative layer, a barrier coating layer and a mildew-proof and fresh-keeping layer, wherein the surface decorative layer and the barrier coating layer are arranged on the front surface and the back surfaceof the paperboard base layer respectively; the mildew-proof and fresh-keeping layer is arranged on the barrier coating layer; the barrier coating layer comprises the following raw materials in partsby weight: 40-70 parts of a polyurethane graft modified PVDC emulsion, 10-20 parts of acrylate copolymers and 5-10 parts of a solvent; the mildew-proof and fresh-keeping layer comprises the followingraw materials in parts by weight: 20-40 parts of a partially hydrolyzed ethylene-vinyl acetate copolymers, 20-40 parts of acrylate copolymers, 5-10 parts of a mildew preventive and 5-10 parts of a solvent. The mildew-proof and fresh-keeping paperboard avoids the problem of a coating fracture caused by nonuniformity of the back surface of the paperboard base layer, and has a relatively good mildew-proof and fresh-keeping effect.

Description

technical field [0001] The invention relates to the field of anti-mildew technology, in particular to an anti-mold fresh-keeping cardboard and a preparation method thereof. Background technique [0002] At present, many anti-mildew and fresh-keeping paper products use thin paper as the cardboard base layer. The method is generally to directly coat the surface of the cardboard base layer with a coating that can play the role of mildew-proof and fresh-keeping. On the other hand, the fibers on the back of the cardboard are rough and the pores are large, and the coating is broken due to the uneven surface of the substrate when coating the coating. Yet along with the application of cardboard more and more widely, it is necessary to provide a kind of mildew-proof and fresh-keeping cardboard with anti-mildew and fresh-keeping effect. Contents of the invention [0003] Based on this, it is necessary to provide a mildew-proof and fresh-keeping cardboard with anti-mildew and fresh-...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H19/82D21H19/14D21H19/20D21H19/24D21H21/36
CPCD21H19/14D21H19/20D21H19/24D21H19/82D21H21/36D21H27/00
Inventor 余赞钟文杜建军张勇军田璐韦雪雪罗臻钱正宇
Owner CHANGDE JINDE NEW MATERIAL TECH CO LTD
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