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Barrier coating material for food paper and paperboard, food paper and paperboard

A food paper and coating technology, which is applied in the field of food paper, cardboard, barrier coating for cardboard and food paper, can solve the problems of easy adhesion and insufficient barrier performance, achieve good ethanol resistance, good continuity and airtightness, and improve Effect of water and oil repellency

Inactive Publication Date: 2022-01-25
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 coating for food paper and cardboard and food paper and cardboard

Method used

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  • Barrier coating material 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

[0071] 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:

[0072] 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.

[0073] 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 regulat...

Embodiment 2

[0076] 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:

[0077] 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.

[0078] 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 paperboard is insufficient in water and oil barrier performance and prone to adhesion, the invention provides a barrier coating material for food paper and paperboard, food paper and paperboard. The barrier coating material comprises the following components: a component A: acrylate copolymer emulsion, wherein the average particle size of emulsion particles is 0.02-0.2 micron, and the Tg value is -20-10 DEG C; a component B: acrylate copolymer emulsion, wherein the average particle size of emulsion particles is 0.02-0.2 micron, and the Tg value is 10-120 DEG C; and a component C: a non-crosslinked polymer emulsion, wherein the average particle size of emulsion particles is 0.5-5 microns, and the Tg value is 75-120 DEG C. The barrier coating material for the food paper and the paperboard, provided by the invention, has relatively good anti-adhesion performance while the water and oil barrier capability and the heat sealability are ensured.

Description

technical field [0001] The invention belongs 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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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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