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High-barrier composite film

A composite film, high-barrier technology, used in synthetic resin layered products, packaging, household appliances, etc., can solve the problems of low barrier performance, low shelf life, and inability to achieve shelf life, and achieve extended shelf life, enhanced use efficiency, The effect of excellent barrier effect

Active Publication Date: 2017-06-23
汕头市岐山橡胶塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the existing films have low barrier properties to moisture and air, which makes the shelf life of the products low and cannot achieve the expected quality preservation effect. Therefore, in order to meet market demand and enhance the high barrier properties of films to moisture and air, continue to develop A high barrier composite film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A high-barrier composite film is characterized in that it includes three composite structure layers: an outer layer, a barrier layer and an inner layer, and the coating is made of the following percentages of components: PA 75%, nano-silica sol 25% , the barrier layer is made of the following percentages of components: PET 40%, PEN 10%, nano-modified montmorillonite 50%, and the inner layer is made of the following percentages of components: PE 40% , PP 50%, nucleating agent 3%, compatibilizer 7%.

[0020] The preparation method of the nano-modified montmorillonite is as follows: 1) configure sodium-based montmorillonite and an appropriate amount of deionized water into a suspension, first stir at a high speed for 35 minutes at room temperature, and then heat up to 60 ° C with high-speed stirring to disperse the sodium-based montmorillonite 2) Add p-aminobenzoate to it, heat up to 90°C, stir at constant temperature for 1.1 h, and then cool, filter, vacuum dry, and grind...

Embodiment 2

[0024] A high-barrier composite film is characterized in that it includes three composite structure layers: an outer layer, a barrier layer and an inner layer, and the coating is made of the following percentages of components: PA 80%, nano-silica sol 20% , the barrier layer is made of the following percentages of components: PET 45%, PEN 15%, nano-modified montmorillonite 40%, and the inner layer is made of the following percentages of components: PE 60% , PP 30%, nucleating agent 4%, compatibilizer 6%.

[0025] The preparation method of the nano-modified montmorillonite is as follows: 1) disperse sodium-based montmorillonite and an appropriate amount of deionized water into a suspension, first stir at a high speed for 40 min at room temperature, and then heat up to 60° C. 2) Add p-aminobenzoate to it, heat up to 92°C, stir at constant temperature for 1.2h, and then cool, filter, vacuum dry, and grind to obtain nano-montmorillonite; 3) Nano-montmorillonite Soil removal and a...

Embodiment 3

[0029] A high-barrier composite film is characterized in that it includes three composite structure layers: an outer layer, a barrier layer and an inner layer, and the coating is made of the following percentages of components: PA 79%, nano-silica sol 21% , the barrier layer is made of the following percentages of components: PET 55%, PEN 8%, nano-modified montmorillonite 37%, and the inner layer is made of the following percentages of components: PE 50% , PP 35%, nucleating agent 3%, compatibilizer 12%.

[0030] The preparation method of the nano-modified montmorillonite is as follows: 1) disperse sodium-based montmorillonite and an appropriate amount of deionized water into a suspension, first stir at a high speed for 40 min at room temperature, and then heat up to 60° C. 2) Add p-aminobenzoate to it, heat up to 95°C, stir at a constant temperature for 1.1 h, then cool, filter, vacuum dry and grind to obtain nano-montmorillonite; 3) put the nano-montmorillonite The soil rem...

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PUM

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Abstract

The invention provides a high-barrier composite film which comprises three composite structure layers, including an outer layer, a barrier layer and an inner layer. The coating is prepared from 75-80% of PA (polyamide) and 20-25% of nano silica sol. The barrier layer is prepared from 30-60% of PET (polyethylene terephthalate), 8-18% of PEN (polyethylene naphthalate) and 30-60% of nano modified montmorillonite. The inner layer is prepared from 30-60% of PE (polyethylene), 30-55% of PP (polypropylene), 2-4% of nucleator and 5-15% of compatilizer. The barrier layer is subjected to blending / intercalation dual modification, thereby greatly enhancing the gas / moisture barrier effects of the film, and obviously prolonging the expiration date of the packaged goods. The silica sol on the outer layer enhances the waterproofing and antifouling effects on the premise of enhancing the PA properties, thereby further ensuring the excellent barrier effects.

Description

technical field [0001] The invention relates to the technical field of composite films, in particular to a high-barrier composite film. Background technique [0002] PET film has good transparency, good air tightness and moderate moisture resistance; at the same time, it has excellent physical and mechanical properties in a wide temperature range, the long-term use temperature can reach 120 ° C, and the electrical insulation is excellent; It also has good creep resistance, fatigue resistance and dimensional stability. It is a packaging film with excellent performance and is widely used in various industries. However, the current barrier properties of the existing films against moisture and air are low, which makes the shelf life of the product relatively low and cannot achieve the expected quality preservation effect. Therefore, in order to meet the market demand and enhance the high barrier properties of the film against moisture and air, continue to develop A high-barrier...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L77/00C08L31/04C08L23/06C08L23/12C08K3/36C08K9/04C08K3/34B29C69/02B29C47/06B29C55/02B32B27/08B32B27/18B32B27/34B32B27/32B32B27/36B65D65/40
CPCB29C48/0018B29C48/18B29C55/026B32B27/08B32B27/18B32B27/32B32B27/34B32B27/36B32B2250/24B32B2264/104B32B2270/00B32B2307/306B32B2307/552B32B2307/7242B32B2307/7265B32B2553/00B65D65/40C08J5/18C08J2323/06C08J2323/12C08J2367/02C08J2377/00C08J2423/06C08J2423/12C08J2431/04C08K3/36C08K2201/011C08L23/06C08L23/12C08L67/02C08L2201/08C08L2203/16C08L2205/02C08L2205/03C08L2205/24C08L77/00C08L31/04C08K9/08C08K3/346
Inventor 丘焕山
Owner 汕头市岐山橡胶塑料有限公司
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