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High-barrier extrusion resistant sheet for all-plastic flexible tubes, and preparation method thereof

An extrusion-resistant and high-barrier technology is applied in the field of high-barrier extrusion-resistant all-plastic hose and its preparation field, and can solve the problems of poor extrusion-resistant barrier properties, low production efficiency, and low production efficiency, etc. Achieving good heat-sealing performance, avoiding exudation and improving heat-sealing strength

Active Publication Date: 2019-06-25
广东超维塑料薄膜有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the aluminum foil layer of the present invention can have a barrier effect, this type of aluminum-plastic hose packaging material is opaque, has poor recyclability, is not conducive to environmental protection, and has poor extrusion resistance.
[0004] CN20134321Y discloses an all-round high-barrier packaging plastic hose, in order to solve the problem that the current packaging plastic hose cannot completely block the oxygen in the air from penetrating into the inside of the hose
The present invention also only considers the high oxygen barrier performance of the material. In addition, the processes of coating and compounding are complicated and the production efficiency is not high.
[0006] Therefore, the current packaging tube sheet still has the disadvantages of low production efficiency, extrusion resistance and poor barrier properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high-barrier extrusion-resistant all-plastic hose sheet, comprising an inner layer (A), a first adhesive layer (B), an EVOH barrier layer (C), a second adhesive layer (D), a poly Ethylene layer (E), polyethylene layer (F), polyethylene layer (G); the proportion of each layer is: inner layer (A) 20%, first adhesive layer (B) 5%, EVOH barrier layer ( C) 5%, second adhesive layer (D) 5%, polyethylene layer (E) 20%, polyethylene layer (F) 20%, polyethylene layer (G) 25%;

[0022] The inner layer (A) is a polyethylene layer, which is composed of component (1) high-density polyethylene (proportion: 80%), component (2) medium-density polyethylene (20%); the first adhesive layer (B ), the second adhesive layer (D) is an adhesive resin containing maleic anhydride grafted linear low density polyethylene; the EVOH barrier layer (C) is composed of EVOH with an ethylene content of 38wt%; the polyethylene layer (E) Composed of component (1) high-density polyethylene (proportion: 7...

Embodiment 2

[0025] A high-barrier extrusion-resistant all-plastic hose sheet, comprising an inner layer (A), a first adhesive layer (B), an EVOH barrier layer (C), a second adhesive layer (D), a poly Ethylene layer (E), polyethylene layer (F), polyethylene layer (G); the proportion of each layer is: inner layer (A) 28%, first adhesive layer (B) 8%, EVOH barrier layer ( C) 4%, second adhesive layer (D) 8%, polyethylene layer (E) 15%, polyethylene layer (F) 15%, polyethylene layer (G) 22%;

[0026] Each composition raw material is with embodiment 1;

[0027]Preparation process: Mix the components of each layer in the mixer according to the sheet structure, stir evenly, and then put them into the seven single-screw extruders of the film blowing machine, melt, transport, and merge at 160-220°C To the blown film die head, the temperature of the die head is 180-230°C, after being extruded through the die head, it is inflated, cooled and shaped, trimmed and wound, and the sheet for the high-bar...

Embodiment 3

[0029] A high-barrier extrusion-resistant all-plastic hose sheet, comprising an inner layer (A), a first adhesive layer (B), an EVOH barrier layer (C), a second adhesive layer (D), a poly Ethylene layer (E), polyethylene layer (F), polyethylene layer (G); the proportion of each layer is: inner layer (A) 20%, first adhesive layer (B) 8%, EVOH barrier layer ( C) 4%, second adhesive layer (D) 8%, polyethylene layer (E) 25%, polyethylene layer (F) 20%, polyethylene layer (G) 15%;

[0030] Each composition raw material is with embodiment 1;

[0031] Preparation process: Mix the components of each layer in the mixer according to the sheet structure, stir evenly, and then put them into the seven single-screw extruders of the film blowing machine, melt, transport, and merge at 160-220°C To the blown film die head, the temperature of the die head is 180-230°C, after being extruded through the die head, it is inflated, cooled and shaped, trimmed and wound, and the sheet for the high-ba...

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Abstract

The invention relates to the field of packaging materials, and concretely relates to a high-barrier extrusion resistant sheet for all-plastic flexible tubes, and a preparation method thereof. The sheet can be used for producing flexible tubes for packaging products such as daily chemicals and foods. A coextrusion molding process is carried out to obtain the sheet for all-plastic flexible tubes, comprising an inner layer (A), a first adhesive layer (B), an EVOH barrier layer (C), a second adhesive layer (D), a polyethylene layer (E), a polyethylene layer (F) and a polyethylene layer (G). The preparation method concretely comprises the following steps: components of every layer of the sheet structure are respectively mixed in a mixer, and are stirred uniformly, the obtained seven mixtures are respectively added into seven single-screw extruders of a film blowing machine, are melted at 160-220 DEG C, are transported, and converge into a film blowing die head, and the finally converged mixtures are extruded at a die temperature of 180-230 DEG C, and a material obtained after the die head extrusion undergoes blowing and cooling shaping, and then is trimmed and wound to obtain the high-barrier extrusion resistant sheet for all-plastic flexible tubes. The sheet for packaging flexible tubes has the characteristics of high production efficiency, good extrusion resistance and excellent barrier property.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a high-barrier extrusion-resistant all-plastic hose sheet and a preparation method thereof. The sheet can be used to prepare flexible tubes for product packaging such as daily chemical products and food. Background technique [0002] Product outer packaging materials are the key factors to ensure that the contents are not easy to leak and perish, including packaging materials such as packaging bags, packaging boxes, and packaging hoses. Packaging hose, because of its relatively low cost, has been widely used in the packaging of daily chemical products and food in daily life after more than ten years of rapid development. At present, the packaging hose is still prone to deformation and damage due to repeated extrusion and use for a long time, causing the contents to leak out or the quality of the contents to be affected due to the long-term infiltration of water vapor and oxyge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B27/08B32B27/30B32B27/32B32B33/00B32B37/15
Inventor 李俊儒
Owner 广东超维塑料薄膜有限公司