Method for producing easy-tear type polypropylene packaging film

A manufacturing method and technology of polypropylene film, applied in the field of plastic packaging, can solve the problems of poor tearing effect, high cost, and difficulty in tearing out cracks, and achieve the effects of reduced tear strength, regular tearing and easy tearing
CN101376270AActive Publication Date: 2009-03-04ZHEJIANG GOLDSTONE PACKING
0 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG GOLDSTONE PACKING
Publication Date
2009-03-04

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a method for manufacturing an easy-to-tear type polypropylene packaging film. The method comprises the following steps: (1) taking a polypropylene thin film meeting the sanitary requirement as a raw material, stretching in a single direction, and specifically, heating the polypropylene thin film to 100DEG C to 160 DEG C, with the stretching ratio being 1.1 to 5, so as to obtain a film material after the positioning stretching; and (2) conducting the temperature reduction treatment for the film material after the positioning stretching, specifically reducing the temperature of the film material after the positioning stretching to the environmental temperature. A packaging bag manufactured through the invention has the advantages of easy tearing, and smooth tearing part, when the packaging bag is torn in the stretching direction.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of plastic packaging, and in particular relates to a method for manufacturing an easy-to-tear polypropylene packaging film. Background technique

[0002] Traditional polypropylene packaging bags are mostly made of non-directionally stretched polypropylene film as the heat-sealing layer, or biaxially stretched polypropylene film as the raw material.

[0003] The disadvantage of the packaging bag directly made of non-directionally stretched polypropylene film as the heat-sealing layer is that the tearing effect is poor, and it is difficult to tear out the tear in a certain direction, let alone in a straight line.

[0004] The disadvantage of the packaging bag made of biaxially stretched polypropylene film as the heat-sealing layer is that the cost is high, and the mechanical and physical properties of the film are reduced due to the biaxial stretching. Contents of the invention

[0005] The purpose of the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More