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

Diffusible films

A blend, elastomer technology, used in the field of diffusion membranes

Inactive Publication Date: 2003-06-18
CELGARD LLC
View PDF4 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these prior art teaches or suggests how to improve the performance of microporous membranes while maintaining membrane porosity

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Examples 1, 3, 5 and 7 are non-porous precursor (ie pre-stretch introduced porosity) films. Examples 2, 4, 6 and 8 are microporous films. All materials were blended by conventional melt blending techniques. Examples 1 and 2 are polyethylene (HDPE, density - 0.959, MFI - 0.42, medium molecular weight, narrow molecular weight distribution) with EPDM rubber (Mooney viscosity - 45, ethylene % - 69, dienes % - 0.5, narrow molecular weight distribution ) blends. Examples 3 and 4 are blends of polypropylene (isotactic homopolymer, density - 0.905, MFI - 1.5) and EPDM rubber (same as Examples 1 and 2). Examples 5 and 6 are blends of polypropylene (same as Examples 3 and 4) with EPR rubber (Mooney viscosity - 51, ethylene % - 61, narrow molecular weight distribution). Examples 7 and 8 are blends of polyethylene (HDPE, density - 0.961, MFI - 0.38) with EPDM rubber (Mooney viscosity - 52, ethylene % - 70, diene % - 3.4, broad molecular weight distribution). These films were co...

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

No PUM Login to View More

Abstract

A diffusion membrane is a microporous sheet comprising a blend of an aliphatic polyolefin and a thermoplastic olefin (TPO) elastomer. The blend comprises less than 10 percent by weight of the elastomer. The preferred polyolefins are selected from a group consisting of polyethylene, polypropylene, copolymers thereof, and blends thereof. The preferred TPO elastomers are selected from the group consisting of ethylene-propylene rubbers (EPR), ethylene-propylene-diene terpolymer rubbers (EPDM), and combinations thereof.

Description

field of invention [0001] A diffuser membrane is prepared from a blend of aliphatic polyolefin and thermoplastic olefin elastomer. Background of the invention [0002] A membrane is a structure that acts as a boundary between two different phases and resists the movement of molecules between the two phases to a greater or lesser degree. This movement is also called diffusion. Membranes can be solid, ie non-porous, or semi-permeable, ie microporous. These microporous structures act as diffusion barriers, as well as high-efficiency filters in the molecular size range, which pass ions, water and other solvents with very small molecules, but hardly permeate large molecules such as proteins and colloidal particles . These membranes are used in process operations such as waste liquid recovery, desalination, electrolysis, osmosis and dialysis, and in industrial applications such as flow regulators in lighters, membranes in oxygenators, charge storage devices such as batteries an...

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): B01D53/22B01D71/24B01D71/26B32B27/32C08J9/00C08L23/04C08L23/10C08L23/16H01M50/403H01M50/406H01M50/417H01M50/494
CPCC08L23/04B01D71/26H01M2/145H01M2/1653C08L23/16C08L23/10B01D71/24Y10T428/31909Y10T428/249953Y10T428/31938Y02E60/10H01M50/403H01M50/417H01M50/406H01M50/494B01D71/261B01D71/262C08L2666/04B32B27/32B01D2323/12B01D2325/20
Inventor K·V·尼盖恩D·K·西蒙斯R·W·考尔S·E·赫克斯
Owner CELGARD LLC
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