Two-way easy-to-tear film

An easy-to-tear, weight-percent technology, applied in layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve the problems of spilled contents, low efficiency, uneven tear edges, etc., to improve production. Efficiency, good customer experience, wide heat sealing window

Active Publication Date: 2019-04-19
江门市华龙膜材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Due to the poor tear guide of the tear or jagged line, it often leads to poor tear or uneven edge of the tear, causing the contents to spill;
[0004] 2. The laser cutting line is easy to tear. Although the tear is smooth, if the cut is too deep, the sealing of the package will be deteriorated, and the shelf life will be affected. If the cut is too shallow, it is not easy to tear;
[0005] 3. Both of the above two methods require subsequent processing of the packaging bag, the position of the tear opening or the easy-tear line is fixed, and the packaging bag only has an easy-tear effect in a specific area, which cannot fully meet the needs of people's efficient life;
[0006] 4. Low efficiency and difficult process control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The two-way easy-to-tear film described in Example 1 has a three-layer structure, which is an outer layer, a middle layer and an inner layer. The layer is 30%; each layer consists of the following components:

[0024] Each component and weight percent of outer layer:

[0025]

[0026] Each component and weight percent of middle layer:

[0027]

[0028] Each component and weight percent of inner layer:

[0029]

[0030]

[0031] The method for preparing the two-way easy-tear film is as follows: after mixing the raw materials of the outer layer, middle layer and inner layer according to the above weight percentages through an automatic mixing system, the raw materials of each layer are respectively added to the outer layer extruder, and the middle layer is extruded. machine and the inner layer extruder are melted and plasticized, and then sent to the die for co-extrusion to form a film bubble. After automatic wind ring cooling and corona treatment, the two-w...

Embodiment 2

[0033] The present embodiment 2 is changed on the basis of embodiment 1, and the weight percentage between the outer layer, the middle layer and the inner layer is different, and the components of each layer are the same, as follows:

[0034] The percentages by weight of the materials of the outer layer, the middle layer and the inner layer of the present embodiment 2 are respectively: 25% for the outer layer, 50% for the middle layer, and 25% for the inner layer.

Embodiment 3

[0036] A two-way easy-tear film described in Example 3 has a three-layer structure, which is an outer layer, a middle layer, and an inner layer. The layer is 25%; each layer consists of the following components:

[0037] Each component and weight percent of outer layer:

[0038]

[0039]

[0040] Each component and weight percent of middle layer:

[0041]

[0042] Each component and weight percent of inner layer:

[0043]

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Abstract

The invention discloses a two-way easy-to-tear film. The two-way easy-to-tear film is three layers, including an outer layer, a middle layer and an inner layer. The outer layer comprises high-pressurelow-density polyethylene, low-pressure high-density polyethylene, linear low-density polyethylene and an ethylene-acrylic copolymer; the middle layer includes low-density polyethylene, metallocene medium-density polyethylene, an ethylene-methacrylic acid copolymer, and an ionomer or ethylene-norborneol dilute copolymer; and the inner layer comprises high pressure low density polyethylene, metallocene low density polyethylene, linear low density polyethylene, an ethylene-octene copolymer and functional master batch. The two-way easy-to-tear film has characteristics of good compound fastness, good customer experience and low cost, and is easy to tear in straight line in two directions.

Description

technical field [0001] The invention relates to the technical field of packaging films, in particular to a film blown by co-extrusion using raw materials such as low-density polyethylene, high-density polyethylene, ethylene-methacrylic acid copolymer, ionomer or ethylene-polybornene copolymer. Formed two-way easy-tear film. Background technique [0002] With the continuous improvement of people's living standards, the demand for the performance of plastic flexible packaging is no longer limited to shelf display, sealed protection of contents, and easy portability. How to open the package conveniently and quickly has become a trend. The easy-to-tear design of food and drug outer packaging reflects the convenience of life, and no tools are needed to open it. However, one of the existing easy-to-tear films is to achieve easy-to-tear through tearing holes or zigzag lines; the other is to control the easy-to-tear effect by controlling the depth of the laser cutting line, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/32B32B33/00
CPCB32B27/08B32B27/308B32B27/32B32B27/327B32B33/00B32B2250/03B32B2250/242B32B2307/412
Inventor 文斌森魏洪媚
Owner 江门市华龙膜材股份有限公司
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