High-transparency polyolefin heat shrinkage film and production method thereof

A polyolefin heat and high transparency technology, which is applied in the high transparency polyolefin heat shrinkable film and its production field, can solve the problems of not meeting higher requirements, insufficient heat sealing strength, and low film transparency, etc., to ensure stability, The effect of improving transparency and increasing speed

Active Publication Date: 2013-10-23
HUBEI ENG UNIV
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) The transparency of the film is not high, the surface is blooming or white, and the printing effect is not good;
[0007] (2) The strength is not enough to meet the higher requirements of the application;
[0008] (3) The heat sealing performance is average, and the heat sealing strength is not high enough. On the one hand, this affects the appearance of the product; on the other hand, it may also affect the quality of the packaged product

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
  • High-transparency polyolefin heat shrinkage film and production method thereof
  • High-transparency polyolefin heat shrinkage film and production method thereof
  • High-transparency polyolefin heat shrinkage film and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of production method of high-transparency polyolefin heat-shrinkable film, its step is as follows:

[0034] 25kg LLDPE, 20kg ethylene-octene copolymer, 54kg LDPE, 0.5kg calcium stearate and 0.5kg glycerol are mixed evenly, then transported to the storage tank, extruded through a single-screw extruder, and the extrusion temperature is 160°C, the extruded material is extruded into a tube blank through the extrusion die of the single-layer blown film machine. The temperature of the extrusion die is 170°C. The temperatures in Zones 1-4 are: 170°C, 210°C, 240°C, 280°C; the temperatures in Zones 5-8 in the stretching oven are: 370°C, 320°C, 230°C, 150°C. Stretch in an oven with air (the inflated gas is compressed air, the same as in the following examples), the stretching temperature is 90°C, the transverse stretching ratio is 5.0-5.2, the longitudinal stretching ratio is 5.0-5.2, and the stretching is 15-18μm thickness of the film, that is.

Embodiment 2

[0036] A kind of production method of high-transparency polyolefin heat-shrinkable film, its step is as follows:

[0037] 25kg LLDPE, 25kg ethylene-octene copolymer, 49kg LDPE, 0.5kg magnesium stearate and 0.5kg glycerol are mixed evenly, then transported to the storage tank, extruded through a single-screw extruder, and the extrusion temperature is 165°C, the extruded material is then extruded into a tube blank through the extrusion die of a single-layer blown film machine. The temperature of the extrusion die is 175°C. The temperatures in zones 1-4 are: 180°C, 210°C, 250°C, 280°C; the temperatures in zones 5-8 in the stretching oven are: 370°C, 340°C, 260°C, 150°C. Inflatable stretching in an oven, the stretching temperature is 90°C, the transverse stretching ratio is 5.0-5.2, the longitudinal stretching ratio is 5.0-5.2, and stretched into a film with a thickness of 15-18 μm.

Embodiment 3

[0039] A kind of production method of high-transparency polyolefin heat-shrinkable film, its step is as follows:

[0040] 25kg LLDPE, 30kg ethylene-octene copolymer, 44kg LDPE, 0.5kg stearic acid and 0.5kg pentaerythritol were mixed evenly, then transported to the storage tank, extruded through a single-screw extruder, the extrusion temperature was 165 ° C, The extruded material is then extruded into a tube blank through the extrusion die of the single-layer blown film machine. The temperature of the extrusion die is 180°C. The temperatures in zone 4 are: 180°C, 210°C, 240°C, and 280°C; the temperatures in zone 5-8 in the stretching oven are: 370°C, 340°C, 260°C, and 150°C, and the tube blank is inflated in the stretching oven Stretching, the stretching temperature is 92°C, the transverse stretching ratio is 4.8-5.0, the longitudinal stretching ratio is 4.8-5.0, and stretched into a film with a thickness of 18-20 μm.

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
temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of a production method of a polymer film material for packaging and in particular discloses a high-transparency polyolefin heat shrinkage film and a production method thereof. The production method of the high-transparency polyolefin heat shrinkage film comprises the following steps of: extruding 25-35 parts by weight of linear low-density polyethylene, 20-30 parts by weight of ethylene-octylene copolymer, 34-54 parts by weight of low-density polyethylene and 1 part by weight of auxiliaries by a single-screw extruder; extruding the materials into a tube blank by an extruding mould head of a single-layer film blowing machine; cooling and pulling the tube blank into a stretching oven for carrying out transverse and longitudinal stretching of a certain times. According to the high-transparency polyolefin heat shrinkage film provided by the invention, the transparency of the film is improved for enabling the packaging of the printed goods to be more attractive; the strength of the film is improved to broaden the application field; the heat sealing performance of the film is improved for adapting to the mechanical production and improving the packaging resilience; and the product has a constant longitudinal-transverse shrinkage rate, so that the packaging stability can be ensured.

Description

technical field [0001] The invention relates to the technical field of a production method of a polymer film material for packaging, in particular to a high-transparency polyolefin heat-shrinkable film and a production method thereof. Background technique [0002] Commodity packaging is required to have the functions of protection, quality preservation and beautification of commodities. With the development of the market economy and the improvement of living standards, people have higher and higher requirements for commodity packaging, and various novel packaging materials have emerged. [0003] Carton packaging is a traditional form of packaging in the food and pharmaceutical industries. Carton packaging has the advantages of good printing performance and recyclability, but its moisture-proof performance is poor, and the packaged goods are prone to mildew and pressure resistance, making it inconvenient to transport and store; carton packaging also has the problems of long ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/098C08K5/053B29C69/00B29C55/12
Inventor 刘海汪杰文胜龚春丽耿青夏玥郑根稳
Owner HUBEI ENG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap