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Barrier film for food paper and paperboard, food paper and paperboard

A technology for food paper and barrier film, which is applied to the barrier film for paperboard and the fields of food paper, food paper and cardboard, can solve the problems of insufficient barrier performance, easy adhesion, etc., and achieves good continuity and airtightness, good ethanol resistance, Effects of low solubility parameters

Pending Publication Date: 2022-02-18
GUANGZHOU HUMAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing polyacrylate coatings for food paper and cardboard have the problems of insufficient water and oil barrier properties and easy adhesion. The invention provides a barrier film for food paper and cardboard and food paper and cardboard

Method used

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  • Barrier film for food paper and paperboard, food paper and paperboard

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preparation example Construction

[0040] In some embodiments, the preparation method of the component A comprises the following steps:

[0041] 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.

[0042] In some embodiments, the preparation method of the component B comprises the following steps:

[0043] 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

[0069] 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:

[0070]Step 1: Prepare acrylate copolymer emulsion component A and acrylate copolymer emulsion component B by means of emulsion polymerization, and obtain acrylate emulsion component C by dispersion polymerization in an alcohol-water mixed solvent, wherein it has been determined that in component A: The solid content is 38.8%, the average particle size of the polyacrylate is 65nm, and the Tg value is -7°C. In component B: the solid content is 40.1%, the average particle diameter of polyacrylate is 71nm, and the Tg value is 50°C. In component C: the solid content is 20.7%, the average particle size of polyacrylate is 3.6 μm, and the Tg value is 103°C.

[0071] Step 2: Mix component A, component B and component C with a mass ratio of 46:46:8, add wetting agent, thickener, defoamer and pH regula...

Embodiment 2

[0074] 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:

[0075] Step 1: Prepare acrylate copolymer emulsion component A and acrylate copolymer emulsion component B by means of emulsion polymerization, and obtain acrylate emulsion component C by dispersion polymerization in an alcohol-water mixed solvent, wherein it has been determined that in component A: The solid content is 45.2%, the average particle diameter of the polyacrylate is 76nm, and the Tg value is -16°C. In component B: the solid content is 46.1%, the average particle diameter of polyacrylate is 52nm, and the Tg value is 58°C. In component C: the solid content is 25.3%, the average particle diameter of polyacrylate is 4.7 μm, and the Tg value is 95°C.

[0076] Step 2: Mix component A, component B and component C with a mass ratio of 65:35:7, add wetting agent, thickener, defoamer and ...

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Abstract

In order to solve the problems that an existing polyacrylate coating for food paper and paperboards is insufficient in water and oil barrier performance and prone to adhesion, the invention provides a barrier film for food paper and a paperboard, the food paper and the paperboard. The barrier film comprises a base film and non-crosslinked polymer particles embedded in the base film and on the surface of the base film. The barrier film for the food paper and the paperboard is obtained by coating and drying a barrier coating, wherein the barrier coating comprises a component A, a component B and a component C, the base film is formed by interpenetrating acrylate copolymer molecular chains in the component A and the component B, and the non-crosslinked polymer particles are derived from a non-crosslinked polymer in the component C. The barrier coating for the food paper and the paperboard, provided by the invention, has relatively good anti-adhesion performance, and ensures water and oil barrier capability and heat sealability.

Description

technical field [0001] The invention belongs to the technical field of food paper and cardboard barrier coatings, and in particular relates to food paper, a barrier film for cardboard, and 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 treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H19/20D21H19/14D21H21/14D21H21/16
CPCD21H27/10D21H19/20D21H19/14D21H21/14D21H21/16
Inventor 朱经纬蒋小明郑海庭陈勇黄光燕
Owner GUANGZHOU HUMAN CHEM
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