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A linear tear, high barrier polyamide film

A polyamide film, high barrier technology, applied in the field of flexible packaging film, biaxially stretched film, to achieve the effects of excellent linear tearing performance, excellent barrier performance, and convenient user experience

Active Publication Date: 2018-08-17
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

[0005] Aiming at the problems existing in the prior art, the present invention proposes a linear tearing and high barrier polyamide film to solve the needs of packaging films for linear tearing and high barrier performance

Method used

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  • A linear tear, high barrier polyamide film
  • A linear tear, high barrier polyamide film

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preparation example Construction

[0032] A kind of linear tearing of the present invention, the preparation method of high barrier polyamide film comprises the following steps:

[0033] In the first step, each layer of material corresponding to the first surface layer, the first tear layer, the barrier layer, the second tear layer and the second surface layer is heated and melted through an extruder; extruded through a five-layer die to make the melt The body is cooled on chilled rolls to form cast flakes. Five extruders or three extruders can be used for co-extrusion, preferably three extruders for co-extrusion: the first surface layer and the second surface layer share one extruder, and the first tear layer Share an extruder with the second tear layer and use an extruder for the barrier layer.

[0034] In the second step, the cast sheet is preheated in a water bath of 40-60°C, and then subjected to a humidity-conditioning treatment in a water bath of 60-75°C, and the surface moisture of the cast sheet is dr...

Embodiment 1

[0045] A linear tearing, high barrier polyamide film, wherein the composition of the first surface layer is 94.8% PA6, 5% aromatic polyamide, 0.1% silicon dioxide, 0.1% erucamide; the composition of the first tearing layer is 78 % PA6, 20% aromatic polyamide, 1% toughening agent, 1% compatibilizer; barrier layer composition is 100% EVOH; second tear layer composition is 78% PA6, 20% aromatic polyamide, 1% Toughening agent, 1% compatibilizer; second surface layer components are 94.8% PA6, 5% aromatic polyamide, 0.1% silicon dioxide, 0.1% erucamide.

[0046] The thickness ratio of each layer of the film in this embodiment is 1 / 4 / 5 / 4 / 1, and the total thickness is 15 μm.

Embodiment 2

[0048] A linear tearing, high barrier polyamide film, wherein the composition of the first surface layer is 88% PA6, 10% aromatic polyamide, 1.0% silicon dioxide, 1.0% erucamide; the composition of the first tearing layer is 50% % PA6, 40% aromatic polyamide, 5% toughening agent, 5% compatibilizer; barrier layer composition is 100% EVOH; second tear layer composition is 50% PA6, 40% aromatic polyamide, 5% Toughening agent, 5% compatibilizer; second surface layer composition is 88% PA6, 10% aromatic polyamide, 1.0% silicon dioxide, 1.0% erucamide.

[0049] The thickness ratio of each layer of the film in this embodiment is 2 / 3 / 5 / 3 / 2, and the total thickness is 15 μm.

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PUM

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Abstract

The invention provides a linear tearing and high-barrier polyamide film. The polyamide film is characterized by comprising five layers of composite structure, which are specifically as follows: a first surface layer, a first tearing layer, a barrier layer, a second tearing layer and a second surface layer, wherein the first surface layer comprises the following components: 88-94.8% of PA6, 5-10% of aromatic polyamide, 0.1-1.0% of silicon dioxide, and 0.1-1.0% of erucyl amide; the first tearing layer is prepared from the following components: 50-79% of PA6, 20-40% of aromatic polyamide, 0-5% of toughening agent, and 1-5% of compatilizer; the barrier layer component is 100% EVOH; the second tearing layer is prepared from the following components: 50-79% of PA6, 20-40% of aromatic polyamide, 0-5% of toughening agent, and 1-5% of compatilizer; and the second surface layer is prepared from the following components: 88-94.8% of PA6, 5-10% of aromatic polyamide, 0.1-1.0% of silicon dioxide, and 0.1-1.0% of erucyl amide. The linear tearing and high-barrier polyamide film provided by the invention has excellent gas barrier performance and linear tearing performance.

Description

Technical field: [0001] The invention relates to the field of flexible packaging films, in particular to the field of biaxially stretched films. technical background: [0002] With the development of social economy, people put forward higher and higher requirements for the hygienic and safety performance of food, especially the use of preservatives is greatly restricted. In order to prolong the shelf life of food packaging, the barrier performance of packaging films is a key technology that technicians need to solve. [0003] As the heat-sealing layer material of flexible packaging composite film, polymers such as linear low-density polyethylene and homopolypropylene are usually used. The bag is difficult to cut and difficult to tear. Since no straight slits can be produced but curved, slanted slits, the risk of accidental leakage of the contents of the bag increases when the bag is torn open, which is very annoying especially when the package contains liquid contents. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/20B32B27/34B32B27/30
CPCB32B27/08B32B27/20B32B27/306B32B27/34B32B2250/24B32B2307/5825B32B2439/70
Inventor 林凤龙陈曦
Owner 厦门长塑实业有限公司
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