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Barrier coating for food paper and paperboard as well as food paper and paperboard

A technology for food paper and coating, applied in the field of barrier coatings for paperboard and food paper, food paper and paperboard, can solve the problems of insufficient water barrier and oil barrier properties, achieve good continuity and airtightness, good ethanol resistance, Effects of low solubility parameters

Inactive Publication Date: 2022-01-21
GUANGZHOU HUMAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of insufficient water barrier and oil barrier performance in existing polyacrylate coatings for food paper and cardboard, the invention provides a barrier coating for food paper and cardboard and food paper

Method used

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Examples

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Effect test

preparation example Construction

[0031] In some embodiments, the preparation method of the component A comprises the following steps:

[0032] ① Add water and emulsifier to the reaction bottle. ②Heating to raise the temperature, adding the pre-emulsified monomer mixture with a calculated Tg of -20-10°C and an initiator to initiate polymerization. ③Add neutralizer to adjust pH value, and obtain emulsion with particle size range of 0.02-0.2 microns through selection and matching of emulsifiers and adjustment of hydrophilic-lipophilic balance of monomers.

[0033] In some embodiments, the preparation method of the component B comprises the following steps:

[0034] ① Add water and emulsifier to the reaction bottle. ②Heating to raise the temperature, adding the pre-emulsified monomer mixture with a calculated Tg of 10-120°C and an initiator to initiate polymerization. The addition method of its monomer and initiator can be the same as the preparation process of component A, or a different addition method can b...

Embodiment 1

[0057] This embodiment is used to illustrate the barrier coating for food paper disclosed by the present invention, food paper and its preparation method, including the following steps:

[0058] Step 1: Prepare acrylate copolymer emulsion component A and acrylate copolymer emulsion component B by means of emulsion polymerization, wherein it has been determined that in component A: the solid content is 40.1%, and the average particle diameter of polyacrylate is 56nm , Tg value is 5°C. In component B: the solid content is 39.5%, the average particle diameter of polyacrylate is 60nm, and the Tg value is 75°C.

[0059] Step 2: Mix component A and component B at a mass ratio of 65:35, add wetting agent, thickener, defoamer and pH regulator, and disperse to obtain a barrier coating for food paper.

[0060] Step 3: Coat the barrier coating for food paper on the paper material, and dry at 80° C. for 10 minutes. Get food paper.

Embodiment 2

[0062] This embodiment is used to illustrate the barrier coating for food paper disclosed by the present invention, food paper and its preparation method, including the following steps:

[0063] Step 1: Prepare acrylate copolymer emulsion component A and acrylate copolymer emulsion component B by means of emulsion polymerization, wherein it is determined that in component A: the solid content is 39.8%, and the average particle diameter of polyacrylate is 67nm , Tg value is -15°C. In component B: the solid content is 39.7%, the average particle diameter of polyacrylate is 72nm, and the Tg value is 90°C.

[0064] Step 2: Mix component A and component B at a mass ratio of 65:35, add wetting agent, thickener, defoamer and pH regulator, and disperse to obtain a barrier coating for food paper.

[0065] Step 3: Coat the barrier coating for food paper on the paper material, and dry at 80° C. for 10 minutes. Get food paper.

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Abstract

In order to solve the problem of insufficient water barrier and oil barrier properties of an existing polyacrylate coating for food paper and a paperboard, the invention provides a barrier coating for food paper and a paperboard. The barrier coating comprises the following components: a component A: an acrylate copolymer emulsion, wherein the average particle size of emulsion particles is 0.02-0.2 micron, the Tg value is -20 DEG C to 10 DEG C; and a component B: an acrylate copolymer emulsion, wherein the average particle size of emulsion particles is 0.02-0.2 micron, and the Tg value is 10 DEG C to 120 DEG C. Meanwhile, the invention further discloses the food paper and the paper board comprising the barrier coating for the food paper and the paper board. The barrier coating for the food paper and the paperboard, provided by the invention, has relatively good water and grease barrier performance and also has excellent heat sealing performance.

Description

technical field [0001] The invention relates to the technical field of barrier coatings for food paper and cardboard, in particular to a barrier coating for food paper and cardboard, food paper and cardboard. Background technique [0002] As a degradable material, paper is widely used in the packaging of various foods or the preparation of disposable containers. Due to the hydrophilic and lipophilic properties of the fibers in paper, it is difficult for untreated paper to effectively block the penetration of moisture in food and Grease leaks, which is not conducive to food packaging and storage. It is a common treatment method for existing food packaging or food container paper to form a coating by coating a coating on paper, to isolate paper and food, and to improve its water and oil resistance. [0003] Since the barrier coatings used for food paper and cardboard need to have good water barrier and grease barrier properties at the same time, the known paper treatment coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H21/14D21H19/20D21H19/14
CPCD21H27/10D21H21/14D21H19/20D21H19/14
Inventor 朱经纬蒋小明郑海庭陈勇黄光燕
Owner GUANGZHOU HUMAN CHEM
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