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A kind of antibacterial high-barrier easy-tear composite film and preparation method thereof

A composite film, high-barrier technology, applied in chemical instruments and methods, adhesive types, synthetic resin layered products, etc. Water resistance, wide application value, good oxygen barrier effect

Active Publication Date: 2021-03-16
HUNAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing packaging, PVDC coatings, composite films containing aluminum foil, EVOH, etc. are mostly used as barrier layers, but these materials have certain defects: PVDC has poor environmental protection and is not conducive to subsequent recycling; composite films containing aluminum foil Poor folding resistance and toughness, prone to defects, affecting its barrier properties; EVOH is expensive and difficult to co-extrude
Generally speaking, organic antibacterial agents have poor heat resistance, are easily hydrolyzed, and have a short validity period.
Natural antibacterial agents mainly come from the extraction of natural plants, which are easy to use, but have limited antibacterial effect, poor heat resistance, low bactericidal rate, cannot be used for broad-spectrum and long-term use, and are in small quantities

Method used

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  • A kind of antibacterial high-barrier easy-tear composite film and preparation method thereof
  • A kind of antibacterial high-barrier easy-tear composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The antibacterial high-barrier easy-tear composite film is composed of a substrate layer, a primer layer, a barrier antibacterial coating, an adhesive layer and a heat-sealing layer.

[0056] The substrate layer is composed of a three-layer co-extruded biaxially oriented nylon film with high barrier and easy tearing properties, which are A, B, and C layers from top to bottom;

[0057] Among them, A layer and C layer are composed of 83.2% PA6, 15% MXD6, 1% nano-inorganic salt, 0.5% opening agent and 0.3% slip agent; B layer is composed of 98.5% MXD6 and 1.5% The barrier antibacterial coating is composed of 0.3% inorganic antibacterial agent and 99.7% water-resistant modified PVA emulsion.

[0058] The sample was prepared according to the aforementioned preparation method, the thickness of the substrate layer was 15 μm, and the thickness of the A layer and the C layer were both 3 μm; the thickness of the primer layer was 1 μm; the thickness of the barrier antibacterial la...

Embodiment 2

[0060] The substrate layer is composed of a three-layer co-extruded biaxially oriented nylon film with high barrier and easy tearing properties, which are A, B, and C layers from top to bottom; among them, A layer and C layer are made of 78.2% PA6, 20 % MXD6, 1% nano-inorganic salt, 0.5% opening agent and 0.3% slip agent; B layer is composed of 98.5% MXD6 and 1.5% nano-inorganic salt. The barrier antibacterial coating is composed of 1% inorganic antibacterial agent and 99% water-resistant modified PVA emulsion.

[0061] The sample was prepared according to the aforementioned preparation method, the thickness of the substrate layer was 15 μm, and the thickness of the A layer and the C layer were both 3 μm; the thickness of the primer layer was 1 μm; the thickness of the barrier antibacterial layer was 1 μm; the adhesive layer was composed of a water-based polyurethane coating, The thickness is 1 μm; the thickness of the heat-sealing layer is 50 μm.

Embodiment 3

[0063] The substrate layer is composed of a three-layer co-extruded biaxially oriented nylon film with high barrier and easy tearing properties, which are A, B, and C layers from top to bottom; among them, A layer and C layer are made of 78.2% PA6, 20 % MXD6, 1% nano-inorganic salt, 0.5% opening agent and 0.3% slip agent; B layer is composed of 98.5% MXD6 and 1.5% nano-inorganic salt. The barrier antibacterial coating is composed of 1% inorganic antibacterial agent and 99% water-resistant modified PVA emulsion.

[0064] The sample was prepared according to the aforementioned preparation method, the thickness of the substrate layer was 15 μm, and the thickness of the A layer and the C layer were both 3 μm; the thickness of the primer layer was 1 μm; the thickness of the barrier antibacterial layer was 2 μm; the adhesive layer was composed of a water-based polyurethane coating, The thickness is 1 μm; the thickness of the heat-sealing layer is 50 μm.

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Abstract

The invention relates to the technical field of film packaging, in particular to an antibacterial high-barrier easy-to-tear composite film and a preparation method thereof. The antibacterial high-barrier easy-to-tear composite film sequentially comprises a base material layer, a bottom coating, an antibacterial barrier coating, an adhesive layer and a heat sealing layer from top to bottom. The base material layer consists of three layers of coextruded bidirectionally tensile nylon films, namely the layers A, B and C sequentially from top to bottom; the layer A and the layer C both consists of65-84.5% of PA6, 15-30% of MXD6, 0.5-3% of nano inorganic salt, 0-1% of an opener and 0-1% of a slipping agent; the layer B consists of 95-99.5% of MXD6 and 0.5-5% of nano inorganic salt; the antibacterial barrier coating consists of 0.3%-2% of an inorganic antibacterial agent and 98-99.7% of a water-resistant modified PVA emulsion. The antibacterial high-barrier easy-to-tear composite film has good barrier, easy-to-tear and antibacterial properties, can be used in the fields of foods, medical packaging and the like, and has a wide application value.

Description

technical field [0001] The invention relates to the technical field of film packaging, in particular to an antibacterial high-barrier easy-tear composite film and a preparation method thereof. Background technique [0002] In modern society, with the rapid development of the soft packaging industry and the continuous improvement of living standards, people's awareness of health and hygiene is increasing. It is required that the soft packaging films used in food packaging or medical packaging not only have good barrier properties, but also have good barrier properties. Good antibacterial properties. At the same time, when tearing the bag, in order to prevent the risk of accidental leakage of the contents due to the strong tear resistance of the bag, the flexible packaging should have good tearability. [0003] In the existing packaging, PVDC coatings, composite films containing aluminum foil, EVOH, etc. are mostly used as barrier layers, but these materials have certain defe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/34B32B27/32B32B7/12B32B27/20B32B33/00C08L77/02C08L77/06C09D129/04C09D5/14C09J175/04
Inventor 贾露刘运锦林新土刘跃军李智尧陈曦郑伟廖贵何
Owner HUNAN UNIV OF TECH