Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Polymer processing additive containing a multimodalfluoropolymer and melt processable thermoplastic polymer composition employing the same

A processing aid, melt processing technology, applied in the field of thermoplastic polymer composition, thermoplastic polymer melt processability

Inactive Publication Date: 2002-06-05
德弘公司
View PDF13 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but did not show a reduction in melt defects

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
  • Polymer processing additive containing a multimodalfluoropolymer and melt processable thermoplastic polymer composition employing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0062] Preparation of multimodal partially crystalline fluoropolymers and comparison with unimodal partially crystalline fluoropolymers as processing aids to eliminate melt fracture in blown film extrusion. Four separate tests were performed. The table below documents the polymer processing aids, experimental conditions and test results.

[0063] Fluoroplastic

Material

Rated monomer composition (weight%)

TFE HFP VDF Ethylene Propylene

peak melting

body temperature

Melt Flow Index (1)

(MFI)

(g / 10min)

THVB

60

18

22

-

-

165

10

THVA

60

18

22

-

-

165

130

THVAA

60

18

22

-

-

165

＞500

HTEB

62

24

-

14

-

160

10

HTEA

62

24

-

14

-

160

90

...

Embodiment 11

[0083] Blown films were prepared as described in Run 3 of Examples 1-10. The effect of five different additive compositions on the melt processability of polyethylene was evaluated. The first additive composition is the multimodal composition of the present invention. It contains 35% by weight THVA and 65% by weight THVB (MFI A : MFI B = 13:1). The blended MFI of the multimodal fluoropolymer additive composition was 41. Other additive compositions include unimodal fluoroplastic polymers nominally having the same monomer composition as THVA. The MFI values ​​of unimodal fluoroplastics are 121, 51, 30 and 10, respectively. The times to eliminate melt fracture for each additive composition are shown in Table 1.

[0084] As can be seen from Table 1, only the multimodal fluoropolymer-based additive composition was able to achieve melt fracture elimination after only 60 minutes of extrusion. The unimodal fluoropolymer did not eliminate melt fracture even after 120 minutes of ...

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 polymer processing aid composition, a melt processable polymer composition that uses the polymer processing aid, and a method of improving the melt processability of a thermoplastic polymer are provided. The polymer processing aid composition comprises a multimodal fluoropolymer that preferably comprises interpolymerized units derived from an ethylenically unsaturated fluoromonomer tetrafluoroethylene and at least one ethylenically copolymerizable alpha-olefin monomer.

Description

technical field [0001] The present invention relates to polymer processing aids using multimodal fluoropolymers; to melt processable thermoplastic polymer compositions using such polymer processing aids; and to improved melt processable thermoplastic polymers method of melt processability. Background technique [0002] For any melt-processible thermoplastic polymer composition, there is a critical shear rate above which the surface of the extrudate becomes rough and below which it becomes smooth. See eg R.F. Westover, Melt Extrusion, Encyclopedia of Polymer Science and Technology, Vol. 8, pp. 573-81 (John Wiley and Sons 19689). The requirement to obtain a smooth extrudate surface is opposed to the economic interest of extruding the polymer composition at the fastest possible speed (ie high shear rate) and must be optimized. [0003] A. Rudin et al., Fluorocarbon Elastomer Aids Polyolefin Extrusion (fluorocarbon elastomer helps polyolefin extrusion), Plastics Engineering (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): B29B7/00B29K23/00B29K27/12B29K101/12C08F214/18C08L23/02C08L23/04C08L23/10C08L27/12C08L27/16C08L27/18C08L101/00
CPCC08L27/12C08L27/16C08L27/18C08L23/04C08L23/02C08L23/10C08L2205/02C08L2666/04
Inventor M·P·荻龙S·S·伍兹K·J·弗罗内克C·拉瓦利S·E·阿莫斯K·D·韦兰特H·卡什帕尔B·赫斯K·欣策P·J·斯科特
Owner 德弘公司
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
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