Linear tearing and high -barrier polyamide film

A polyamide film, high barrier technology, applied in the field of flexible packaging film, biaxially stretched film, to achieve excellent linear tear performance, improve shelf life, and convenient use experience

Active Publication Date: 2017-05-31
XIAMEN CHANGSU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems existing in the prior art, the present invention proposes a linear tearing and hi

Method used

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  • Linear tearing and high -barrier polyamide film
  • Linear tearing and high -barrier polyamide film

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preparation example Construction

[0035] A kind of linear tearing of the present invention, the preparation method of high barrier polyamide film comprises the following steps:

[0036] 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.

[0037] 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

[0048] 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% aramid, 1% toughening agent, 1% compatibilizer; barrier layer composition is 100% EVOH; second tear layer composition is 78% PA6, 20% aramid, 1% Toughening agent, 1% compatibilizer; second surface layer components are 94.8% PA6, 5% aromatic polyamide, 0.1% silicon dioxide, 0.1% erucamide.

[0049] 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

[0051] 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.

[0052] The thickness ratio of each layer of the film of 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

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Claims

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Application Information

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Owner XIAMEN CHANGSU INDAL
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