Polyethylene composition and film thereof

A technology of polyethylene and composition, which is applied in the field of polyethylene composition and its film, and can solve the problems of poor film formation and easy cracking of the film

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
View PDF13 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of poor film-forming properties and easy rupture of the film when the existing polyethylene raw material is prepared by the flat film stretching method, and to provide a new polyethylene composition and The film made of ethylene composition, the polyethylene composition obtained by the inventors of the present inve

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 composition and film thereof
  • Polyethylene composition and film thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0037] According to a preferred embodiment of the present invention, the polyethylene composition is figure 1 Prepared in the multi-reactor parallel device shown, the multi-reactor parallel device includes a first reactor 1, a second reactor 2, a third reactor 3, a fourth reactor 7, solid / liquid (gas) The separator 4, the homogenization silo 5 and the melt granulation system 6, wherein the first reactor 1, the second reactor 2, the third reactor 3 and the fourth reactor 7 are connected in parallel, and the solid / The number of liquid (gas) separators 4 is four, which are respectively connected to the first reactor 1, the second reactor 2, the third reactor 3 and the fourth reactor 7. The group prepared by the first reactor 1 Component A, component B prepared by the second reactor 2, component C prepared by the third reactor 3, and component D prepared by the fourth reactor 7 are separated in different solid / liquid (gas) separations. The phase separation is carried out in the v...

Embodiment 1

[0056] This example is used to illustrate the polyethylene composition and barrier film provided by the present invention.

[0057] (1) Preparation of polyethylene composition:

[0058] The polyethylene composition provided in this embodiment is composed of component A, component B, component C, component D and component E, wherein component A, component B, component C and component D are all Ethylene-α olefin copolymerized linear low density polyethylene (LLDPE), and all adopt the same catalyst system (Ziegler-Natta catalyst, which is prepared by CN101838351A Example 1 of the Ziegler-Natta catalyst system, below Same) and polymerization process, the difference lies in the amount of hydrogen added when preparing different components and the type and molar content of alpha olefin comonomer; component E is POE barrier masterbatch P1. Specific steps are as follows:

[0059] Add ethylene, alpha olefin, hydrogen and nitrogen (ethylene, alpha olefin, hydrogen and nitrogen are all polymer...

Embodiment 2

[0070] This example is used to illustrate the polyethylene composition and barrier film provided by the present invention.

[0071] (1) Preparation of polyethylene composition:

[0072] The polyethylene composition provided in this embodiment is composed of component A, component B, component C, component D and component E, wherein component A, component B, component C and component D are all Linear low-density polyethylene (LLDPE) copolymerized with ethylene and alpha olefins are prepared by using the same catalyst system (Ziegler-Natta catalyst) and polymerization process. The difference lies in the amount of hydrogen added when preparing different components and alpha The type and molar content of olefin comonomers are different; component E is POE barrier masterbatch P1. Specific steps are as follows:

[0073] Add ethylene, alpha olefins, hydrogen and nitrogen into the fluidized bed gas phase reactor, then add the Ziegler-Natta catalyst system, and then polymerize at a temperat...

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
Melt indexaaaaaaaaaa
Densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of polyethylene materials, and discloses a polyethylene composition, which is characterized by comprising a component A, a component B, a component C, a component Dand a component E, wherein under the conditions that the temperature is 190 DEG C and the load is 2.16 kg, the MIA of the component A is 0.01 g/10 min to 3.5 g/10 min, and the rho A is 0.880 g/cm < 3> to 0.936 g/cm < 3 >; the MIB of the component B is 3.6 g/10 min to 9.9 g/10 min, and the rho B is 0.910 g/cm < 3 > to 0.930 g/cm < 3 >; the MIC of the component C is 16 g/10 min to 80 g/10 min, andthe rhoC is 0.880 g/cm < 3 > to 0.930 g/cm < 3 >; the MID of the component D is 10 to 15g/10min, and the rho D is 0.880 to 0.930 g/cm < 3 >; and the component E is obtained by performing twin-screw extrusion granulation on an ethylene-octene copolymer, polyethylene glycol and an aerogel. When a polyethylene film is prepared from the polyethylene composition prepared by matching the component A, the component B, the component C, the component D and the component E with specific melt indexes and densities by adopting a flat film stretching method, the polyethylene film has the advantages of highstretching ratio, high film forming rate, high mechanical strength and excellent barrier property, and has great industrial application prospects.

Description

Technical field [0001] The invention relates to the field of polyethylene materials, in particular to a polyethylene composition and a film thereof. Background technique [0002] Biaxially Oriented Polyethylene (BOPE) film is a film material made of polyethylene (PE) resin with a special molecular structure through a biaxial stretching process. In the forming process of the BOPE film, after the film is stretched, the PE macromolecular chain and crystal structure are highly oriented, which significantly increases the tensile strength of the film, reduces the tensile elongation at break, and makes the film Lower haze, higher gloss and better transparency. In addition, compared with the polyethylene film products prepared by the extrusion blow molding process and the extrusion casting process of the prior art, the BOPE film has high mechanical strength, good puncture resistance and impact resistance, excellent optical performance, energy saving and environmental protection. Advant...

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): C08L23/08C08J5/18
CPCC08J5/18C08J2323/08C08J2423/08
Inventor 邵静波张师军高达利白弈青徐萌
Owner CHINA PETROLEUM & CHEM CORP
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