Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

Active Publication Date: 2009-03-04
ZHEJIANG GOLDSTONE PACKING
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the packaging bag directly made of non-directional 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

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing easy-tear type polypropylene packaging film
  • Method for producing easy-tear type polypropylene packaging film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Present embodiment is a kind of manufacture method of easy-tear type polypropylene packaging film, has the following steps:

[0024] ①Primary stretching: take the polypropylene film that meets the hygienic requirements as the raw material, and perform unidirectional directional stretching on it, specifically, pass the polypropylene film through the surface of the heating roller with hot oil, and heat it to 130±3°C Stretching is carried out, and the stretching ratio is 3 to obtain a film material after directional stretching;

[0025] ②One-time cooling: cooling the directional stretched film material, specifically, making the directional stretched film material pass through the surface of the cooling roller with running water, so that its temperature is suddenly cooled to 25±3°C.

[0026] The film material obtained after a cooling treatment is detected, its thickness is 70 μm, the elongation at break in the stretching direction is 125%, the elongation at break in the uns...

Embodiment 2 to Embodiment 6

[0028] Embodiment 2 to embodiment 6 are basically the same as embodiment 1, and the difference is: each embodiment in embodiment 2 to embodiment 6 detects the easy-to-tear type polypropylene packaging film obtained at last, and its various properties The parameters are: the temperature at which the polypropylene film is heated is different, and the stretching ratio is also slightly different. In addition, the temperature at which it is quenched is also different. See Table 1 for specific parameters.

[0029] Table 1

[0030]

[0031] The tearing test was carried out on the polypropylene packaging film finally obtained in the above-mentioned Examples 1 to 6, and the tear was basically linear along the stretching direction, and it was an easy-to-tear polypropylene packaging film.

Embodiment 7

[0033] Present embodiment is a kind of manufacture method of easy-tear type polypropylene packaging film, has the following steps:

[0034] ①Primary stretching: take the polypropylene film that meets the hygienic requirements as the raw material, and perform unidirectional directional stretching on it, specifically, pass the polypropylene film through the surface of the heating roller with hot oil, and heat it to 130±3°C Stretching is carried out, and the stretching ratio is 3 to obtain a film material after directional stretching;

[0035] ②One-time cooling: cooling the directional stretched film material, specifically, making the directional stretched film material pass through the surface of the cooling roller with running water, so that its temperature is suddenly cooled to 25±3°C.

[0036] ③Secondary Stretching: Stretch it in one direction. Specifically, pass the polypropylene film through the surface of a heating roller with hot oil, heat it to 130±3°C and then stretch i...

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

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Breaking forceaaaaaaaaaa
Login to View More

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.

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

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B29C55/04B29C35/02B29C35/16B29C71/00B29K23/00B29L7/00
Inventor 张文锋孙国锦
Owner ZHEJIANG GOLDSTONE PACKING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com