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PVOH coating film with high peel strength and preparation method thereof

A technology of peel strength and coating film, which is applied in the field of food flexible packaging, can solve the problems of limitation, weak bonding force, printing peeling off or composite delamination, etc., and achieve the effect of reducing production cost, raw materials and less process

Active Publication Date: 2020-01-07
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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  • PVOH coating film with high peel strength and preparation method thereof
  • PVOH coating film with high peel strength and preparation method thereof

Examples

Experimental program
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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. The PVOH coating film comprises a base material layer and a coating layer which are adhered in sequence; the coating layer is a self-adhesive PVOH coating layer, and the base material layer is a BOPP film layer with a heat sealing function. The invention provides the novel BOPP self-adhesive PVOH emulsion coating film with heat sealing performance. The BOPP self-adhesive PVOH emulsion coating film has an important characteristic that the adhesive force of a BOPP heat sealing surface with a PVOH coating layer is much better than that of a BOPP light film with the PVOH coating layer. The peel strength of the heat-seal BOPP and the coating PVOH coating layer is larger than or equal to 1.2 N / 15 cm, while the peel strength ofthe BOPP light film and the coating PVOH coating layer is smaller than or equal to 0.6 N / 15 cm. And the improvement of the peel strength provides greater possibility for the application of the material. For example, printing of a coating layer, compounding of the coating layer and other materials and the like are achieved. The invention provides the novel PVOH coating film which is provided with two functional layers, the outer layer is a biaxially drawn polypropylene layer and can provide good mechanical properties, and the inner layer is the PVOH coating layer and can provide good barrier properties and also has good printing and other material compounding characteristics.

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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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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