A PVOH coating film with high peel strength and its manufacturing method

A technology of peel strength and coating film, which is applied in the direction of chemical instruments and methods, coatings, synthetic resin layered products, etc., can solve problems such as limitation, weak bonding force, printing peeling off or composite delamination, and reduce production The effect of cost, reduction of raw materials, and fewer layers

Active Publication Date: 2021-04-16
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PVOH coating is coated on the light film. After printing and compounding, the bonding force between the two layers is not strong, and it is easy to cause printing peeling or compound delamination during use, which affects the barrier function and packaging performance of food.
Therefore, it is limited in the application of food packaging with high appearance requirements and high barrier requirements
In addition, there are many production processes for multi-layer coating composite films, and generally need to go through three major processes such as two coatings and one lamination; PVDC cannot be recycled, and harmful gases containing chlorine will be generated after recycling

Method used

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  • A PVOH coating film with high peel strength and its manufacturing method
  • A PVOH coating film with high peel strength and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of PVOH coating film with high peeling strength of the present invention, comprises substrate layer 1 and coating layer 2 of adhesion successively; Described coating layer 2 is self-adhesive PVOH coating layer 2, and described substrate layer 1 is to have Heat-sealed BOPP film layer. The self-adhesive PVOH coating layer 2 is prepared from the following raw materials by weight: 5% PVOH, 0.04% toluene diisocyanate, 0.2% amino resin, 0.005% catalyst, 0.005% surfactant, 0.003% defoamer , 94.747% deionized water.

[0027] The substrate layer 1 is a single-sided heat-sealed BOPP film; the structure and formula of the BOPP film are as follows: the structure is divided into three layers: upper, middle and lower; the upper layer is a heat-sealed layer prepared from the following raw materials by weight percentage: 95% copolymer Polypropylene and known heat seal compound and 5% synthetic silica or other inorganic silica. The middle layer is prepared from the following ra...

Embodiment 2

[0035] A kind of PVOH coating film with high peeling strength of the present invention, comprises substrate layer 1 and coating layer 2 of adhesion successively; Described coating layer 2 is self-adhesive PVOH coating layer 2, and described substrate layer 1 is to have Heat-sealed BOPP film layer. The self-adhesive PVOH paint layer 2 is prepared from the following raw materials by weight: 10% PVOH, 0.5% toluene diisocyanate, 1% amino resin, 0.02% catalyst, 0.015% surfactant, 0.015% defoamer , 88.45% deionized water.

[0036] The substrate layer 1 is a single-sided heat-sealed BOPP film; the structure and formula of the BOPP film are as follows: the structure is divided into three layers: upper, middle and lower; the upper layer is a heat-sealed layer prepared from the following raw materials by weight percentage: 99% Polypropylene and known heat seal compound and 1% synthetic silica or other inorganic silica. The middle layer is prepared from the following raw materials in w...

Embodiment 3

[0044] A kind of PVOH coating film with high peeling strength of the present invention, comprises substrate layer 1 and coating layer 2 of adhesion successively; Described coating layer 2 is self-adhesive PVOH coating layer 2, and described substrate layer 1 is to have Heat-sealed BOPP film layer. The self-adhesive PVOH coating layer 2 is prepared from the following raw materials by weight: 7% PVOH, 0.3% toluene diisocyanate, 0.6% amino resin, 0.01% catalyst, 0.01% surfactant, 0.01% defoamer , 92.07% deionized water.

[0045] The substrate layer 1 is a single-sided heat-sealed BOPP film; the structure and formula of the BOPP film are as follows: the structure is divided into three layers: upper, middle and lower; the upper layer is a heat-sealed layer, which is prepared from the following raw materials in weight percentage: 97% Copolymerized polypropylene and known heat seal compound and 3% synthetic silica or other inorganic silica. The middle layer is prepared from the fol...

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Abstract

The invention discloses a PVOH coating film with high peel strength, which comprises a substrate layer and a coating layer adhered in sequence; the coating layer is a self-adhesive PVOH coating layer, and the substrate layer is a heat-sealed BOPP film layer. The invention provides a new BOPP self-adhesive PVOH emulsion coating film with heat sealing performance, which has an important characteristic: the adhesion of BOPP heat cover and PVOH coating is higher than that of BOPP light film and PVOH coating. Much better focus. The peeling strength between heat-sealed BOPP and PVOH coating is ≥1.2N / 15cm, while the peeling strength between BOPP film and PVOH coating is ≤0.6N / 15cm. The improvement of its peel strength provides greater possibilities for the application of the material. For example, the printing of the coating layer, the compounding of the coating layer and other materials, etc. The invention provides a new PVOH coating film, which has two functional layers, the outer layer is a biaxially stretched polypropylene layer, which can provide good mechanical properties, and the inner layer is a PVOH coating, which can provide good barrier properties , but also has good printing and composite properties with other materials.

Description

technical field [0001] The invention relates to coating of modified BOPP and PVOH paint and a manufacturing method thereof, belonging to the field of food flexible packaging. Background technique [0002] For food packaging that currently requires high barrier properties, BOPP film is coated with PVOH or PVDC coating, printed on PVOH coating, and then compounded with PE or CPP to achieve high barrier performance and packaging performance. However, after PVOH coating is coated on the optical film, after printing and compounding, the bonding force between the two layers is not strong, and it is easy to cause printing peeling or compound delamination during use, thus affecting the barrier function and packaging performance of food. Therefore, it is limited in the application of food packaging with high appearance requirements and high barrier requirements. In addition, there are many production processes for multi-layer coated composite films, which generally require three maj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/18B32B27/06B32B33/00C09D129/04C09D161/20C09D7/63
CPCB32B27/08B32B27/18B32B27/32B32B33/00B32B2255/10C08L2203/16C09D129/04C09D7/63C08L61/20C08K5/29
Inventor 黎坛王恩飞冯亮韦小洪李朝辉
Owner HAINAN SHINER IND
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