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Transparent antibacterial high-temperature-resistant BOPA pre-coating film and preparation method thereof

A high temperature resistant, pre-coating technology, used in coatings, antifouling/underwater coatings, polyurea/polyurethane coatings, etc., can solve problems such as low adhesion, affecting film haze, and not resistant to boiling

Active Publication Date: 2020-06-26
厦门长塑实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned background technology, silver has outstanding sterilization and safety on packaging, but it is directly added to nylon for modification, which will affect the haze and other characteristics of the film itself, and the nano-silver aqueous solution is directly coated on nylon. Low adhesion on the film, not resistant to boiling, steaming problem, the present invention provides a kind of transparent antibacterial and high temperature resistant BOPA pre-coating film, comprising polyamide film layer and coating water-based polyurethane mixed solution on the polyamide film, The coating layer formed on the lower surface, the water-based polyurethane mixed solution coating is preferably carried out by dipping;

Method used

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  • Transparent antibacterial high-temperature-resistant BOPA pre-coating film and preparation method thereof
  • Transparent antibacterial high-temperature-resistant BOPA pre-coating film and preparation method thereof
  • Transparent antibacterial high-temperature-resistant BOPA pre-coating film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0059] The polyamide sheet obtained by co-extrusion casting is subjected to double-sided corona treatment on its surface after longitudinal stretching, so that the corona value of the surface is ≥52dyn / cm, and then passed through a water-based polyurethane dispersion , nano-silver aqueous solution, amine catalyst, bridging agent and water with a mass ratio of 12:0.2:0.04:1.5:12 in the rolling groove of the water-based polyurethane mixture, quickly squeezed through two rollers, and the excess The water-based polyurethane mixture is squeezed out at a speed of 200m / min, and dried at 180°C. At the same time, the polyamide film is stretched transversely and shaped at 200°C to obtain a transparent antibacterial and high temperature resistant BOPA pre-coating film.

[0060] Wherein, the aqueous polyurethane dispersion is made from isophorone diisocyanate and polycarbonate diol.

[0061] The water-based polyurethane dispersion, nano-silver aqueous solution, amine catalyst, bridging ag...

Embodiment 2

[0066] The polyamide sheet obtained by co-extrusion casting is subjected to double-sided corona treatment on its surface after longitudinal stretching, so that the corona value of the surface is ≥52dyn / cm, and then passed through a water-based polyurethane dispersion , nano-silver aqueous solution, amine catalyst, bridging agent and water with a mass ratio of 12:0.2:0.04:2.0:12 in the rolling groove of the water-based polyurethane mixture, quickly squeezed through two rollers, and the excess The water-based polyurethane mixture is squeezed out at a speed of 200m / min, and dried at 180°C. At the same time, the polyamide film is stretched transversely and shaped at 200°C to obtain a transparent antibacterial and high temperature resistant BOPA pre-coating film.

[0067] Wherein, the aqueous polyurethane dispersion is made from isophorone diisocyanate and polycarbonate diol.

[0068] The water-based polyurethane dispersion, nano-silver aqueous solution, amine catalyst, bridging ag...

Embodiment 3

[0073] The polyamide sheet obtained by co-extrusion casting is subjected to double-sided corona treatment on its surface after longitudinal stretching, so that the corona value of the surface is ≥52dyn / cm, and then passed through a water-based polyurethane dispersion , nano-silver aqueous solution, amine catalyst, bridging agent and water with a mass ratio of 12:0.1:0.04:2.0:12 in the rolling groove of the water-based polyurethane mixture, quickly squeezed through two rollers, and the excess The water-based polyurethane mixture is squeezed out at a speed of 200m / min, and dried at 180°C. At the same time, the polyamide film is stretched transversely and shaped at 200°C to obtain a transparent antibacterial and high temperature resistant BOPA pre-coating film.

[0074] Wherein, the aqueous polyurethane dispersion is made from isophorone diisocyanate and polycarbonate diol.

[0075] The water-based polyurethane dispersion, nano-silver aqueous solution, amine catalyst, bridging ag...

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Abstract

The invention relates to the field of nylon functional packaging films, in particular to a transparent antibacterial high-temperature-resistant BOPA pre-coating film and a preparation method thereof.The transparent antibacterial high-temperature-resistant BOPA pre-coating film comprises a polyamide film layer and coating layers formed by coating the upper surface and the lower surface of the polyamide film with waterborne polyurethane mixed liquid. The waterborne polyurethane mixed liquid comprises the following components: a waterborne polyurethane dispersion, a nano-silver aqueous solution,an amine catalyst, a bridging agent and water. The transparent, antibacterial and high-temperature-resistant BOPA pre-coating film prepared by adopting the preparation method disclosed by the invention has the performance of resisting bacteria such as staphylococcus aureus and escherichia coli; the transparency of the film is not influenced and the film can resist high temperature cooking at a temperature of 125 DEG C for 40 min so as to meet the nylon characteristics and the subsequent processing requirements; the printing adhesion and the glue adhesion can be improved substantially by the coating layers, the generation of the bacteria of the film can be prevented effectively, the risk of the contact with the bacteria during the touch can be reduced, and the transparent antibacterial high-temperature-resistant BOPA pre-coating film has the broad application prospects.

Description

technical field [0001] The invention relates to the field of nylon functional packaging films, in particular to a transparent antibacterial and high temperature resistant BOPA precoat film and a preparation method thereof. Background technique [0002] In people's daily life environment, bacteria and other pathogenic microorganisms are ubiquitous, threatening human health. Although food has been sterilized during processing, and many foods themselves contain antibacterial systems such as spices, the surface of food is still easily contaminated by microorganisms during storage, transportation, and sale on supermarket shelves. It will be equipped with bacteria, which will affect people's health. [0003] After BOPP and BOPET, biaxially oriented BOPA film is becoming the third in the family of stretched films. It is favored by domestic and foreign users in food packaging, but its lack of antibacterial properties limits its application fields. ; [0004] Therefore, "A Prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08L77/02C09D5/14C09D175/04C08G18/44C08G18/80
CPCC09D175/04C09D5/14C08G18/44C08G18/8016C08K2003/0806C08K2201/011C08G18/757C08G18/3206C08K3/08Y02W90/10
Inventor 李智尧贾露林新土陈曦郑伟廖贵何刘运锦牟青英
Owner 厦门长塑实业有限公司