US 10,472,432 B2Granted

Articles containing PTFE having improved dimensional stability particularly over long lengths, methods for making such articles, and cable/wire assemblies containing such articles

AssigneeSaint-Gobain Performance Plastics Corporation

InventorsJessica L. McCoy, Georges Moineau, Philip C. Guy, Mark E. Schiek, Joseph B. MacDonald, Frank M. Keese, Jennifer Adamchuk, Silvia Ruth Gorman, Scott P. Campbell, Paul J. Beaumont, John Marko

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Abstract

The present disclosure relates to methods of making an article comprising PTFE, methods of making expanded articles comprising PTFE, articles comprising PTFE, and expanded articles comprising PTFE having improved mechanical and electrical performance and particularly reduced variability in mechanical, electrical and dimensional properties, particularly over long lengths.

Claims16

Dependent claims

An article comprising a non-meltprocessable polymer, the article having a continuous length of at least 80 meters, wherein the article has a mean average thickness of no greater than 1000 microns over a continuous length of 80 meters, wherein the article is essentially free of artifacts of paste extrusion over a continuous length of 80 meters, and wherein the article has a standard deviation of mean average thickness of no more than 1.6 microns.

Dependencies are inferred from the claim text.

Facts

Application: 15/813,424Filed 15 Nov 2017 · continuation
Priority: 8 Nov 2013
Published: US 2018/0072824 A115 Mar 2018
Granted: 12 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

B29C 48/48
Using pistons, accumulators or press rams: two or more rams or pistons
B29C 48/0011
Combinations of extrusion moulding with other shaping operations: combined with compression moulding
B29C 48/022
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor:…
B29C 48/06
Characterised by the shape of the extruded material at extrusion: rod-shaped

Family

Application61/901,923Us provisional application · filed 8 Nov 2013
Application14/535,946Parent of this continuation · filed 7 Nov 2014
US 2018/0072824 A1Pre-grant publication · published 15 Mar 2018
US 10,066,033 B2Parent of this continuation
US 2015/0166694 A1Published application
US 10,472,432 B2This patent

From the US filing history. Foreign family members aren’t listed.