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

Polyethylene film and preparation method thereof

A polyethylene film, polyethylene technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of low production efficiency, poor optical properties and mechanical properties of polyethylene films, etc. The effect of improving production efficiency, reducing friction coefficient, and excellent slippery performance

Active Publication Date: 2013-08-21
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages that the polyethylene film needs to be placed for a period of time to achieve its smooth effect, the production efficiency is low, and the optical and mechanical properties of the obtained polyethylene film are not good. , to provide a method for preparing a polyethylene film that can achieve its slippery effect without placing it and has a high yield, and the obtained polyethylene film has excellent slippery properties, optical properties and mechanical properties

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
  • Polyethylene film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017]The preparation method of the polyethylene film provided by the present invention comprises mixing polyethylene and self-lubricating particles uniformly, feeding them into an extruder for melting and kneading, extruding and granulating to obtain a raw material for a smooth surface layer; The raw materials and polyethylene are sent to extrusion casting equipment with a multi-layer co-extrusion structure for extrusion casting to obtain a polyethylene core layer and a smooth surface layer attached to at least one side surface of the polyethylene core layer. cast sheet; and the obtained cast sheet is biaxially stretched to obtain a biaxially stretched polyethylene film comprising a polyethylene core layer and a smooth surface layer attached to at least one side surface of the polyethylene core layer The smooth surface layer is a polyethylene layer dispersed with self-lubricating particles; the polyethylene in the polyethylene core layer and the smooth surface layer has a melt...

Embodiment 1

[0028] This embodiment is used to illustrate the preparation of the polyethylene film provided by the present invention.

[0029] In this embodiment, the polyethylene forming the polyethylene core layer and the smooth surface layer is purchased from ExxonMobil Corporation, with a melt index of 1 g / 10 min and a melting temperature of 128°C at 190°C and 2.16 kg.

[0030] (1) Preparation of smooth surface layer raw materials:

[0031] The polyethylene was dried in a hot air oven, wherein the drying method was continuous blowing with dry hot air at 80° C. for 8 hours. Add 99.5 parts by weight of dried polyethylene and 0.5 parts by weight of polytetrafluoroethylene particles (particle diameter is 1-2 microns) into the mixer and stir evenly at 25 ° C. The mixer first mixes at a low speed of 100 rpm About 7 minutes, then mix at 200 rpm for 8 minutes at high speed;

[0032] The above-mentioned homogeneously stirred mixture is fed into a twin-screw extruder. Adjust the rotating spee...

Embodiment 2

[0038] This embodiment is used to illustrate the preparation of the polyethylene film provided by the present invention.

[0039] In this example, the polyethylene forming the polyethylene core layer and the smooth surface layer was purchased from Maoming Petrochemical, with a melt index of 2 g / 10 minutes and a melting temperature of 123° C. at 190° C. and 2.16 kg.

[0040] (1) Preparation of smooth surface layer raw materials:

[0041] Dry the polyethylene in a hot air oven, wherein the drying method is to continuously blow with dry hot air at 80° C. for 8 hours. Add 97 parts by weight of dried polyethylene and 3 parts by weight of polytetrafluoroethylene particles (particle diameter is 2-4 microns) into the mixer and stir evenly at 25 ° C. The mixer first mixes at a low speed of 80 rpm About 5 minutes, then mix at 15 rpm for 6 minutes at high speed;

[0042]The above-mentioned homogeneously stirred mixture is fed into a twin-screw extruder. Adjust the rotating speed of th...

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
Melt indexaaaaaaaaaa
Melting temperatureaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a polyethylene film and a preparation method thereof. The film comprises a polyethylene core layer and a smooth surface layer adhered to at least one side surface of the polyethylene core layer. The smooth surface layer is a polyethylene layer with dispersed self-lubricating micro-particles. Fusion index of the polyethylene in the polyethylene core layer and the smooth surface layer under 190 DEG C and 2.16kg are 0.5-5g / 10min, and preferably 1-3.5g / 10min. The self-lubricating micro-particles are high-molecular micro-particles with melting temperature higher than or equal to 250 DEG C and with both static friction coefficient and dynamic friction coefficient smaller than or equal to 0.6. The polyethylene film provided by the invention has excellent smooth performance, optical performance, and mechanical performance.

Description

technical field [0001] The invention relates to a polyethylene film and a preparation method thereof. Background technique [0002] Biaxially oriented polyethylene film (BOPE film) has excellent chemical stability, heat sealability, water resistance, and water resistance and breathability. It is an ideal packaging material and is widely used in the packaging of food, fruits and vegetables, baby products, etc. Occupy a very important position in the market. However, BOPE film, like most plastic films, has defects such as large friction coefficient, severe frictional static electricity, and easy adhesion between films, which limits its application in high-speed packaging, lubricating diaphragms and other fields that require films to have good slippery properties. application. [0003] At present, the method of adding a slip agent to the polyethylene film is generally used to reduce the friction coefficient of the polyethylene film and improve its easy-to-stick defects, and i...

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): B32B27/32B29B9/06B29C69/02B29C55/12
Inventor 徐凯徐萌高达利张师军张丽英张浩邹浩邵静波
Owner CHINA PETROLEUM & CHEM CORP
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com