US 2001/0011447 A1Published application

Un-sintered polytetrafluoroethylene processed article

AssigneeDainkin Industries, Ltd.

InventorsToshiro Miura, Yoshihiro Soda, Tadao Hayashi

Life of this patent

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Abstract

To provide an un-sintered polytetrafluoroethylene processed article which has an un-sintered polytetrafluoroethylene layer formed by coating and/or impregnating with an aqueous dispersion of PTFE and is characterized in that a content of alkyl phenols detected from the un-sintered PTFE layer is not more than 0.1 ppm. The un-sintered PTFE-processed article scarcely contains alkyl phenols which are suspected as chemical substances having endocrine disrupting activity.

Claims6

Dependent claims

An un-sintered polytetrafluoroethylene processed article having an un-sintered PTFE layer formed by coating and/or impregnating with an aqueous dispersion of PTFE, a content of alkyl phenols detected from said un-sintered polytetrafluoroethylene layer being not more than 0.1 ppm.

Dependencies are inferred from the claim text.

Facts

Application: 09/769,264Filed 26 Jan 2001
Priority: JP 20720/200028 Jan 2000
Published: 9 Aug 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16J 15/20
With stuffing-boxes for elastic or plastic packings: packing materials therefor
B01D 39/1692
Of organic material, e.g. synthetic fibres: other shaped material, e.g. perforated or porous sheets
B01D 46/02
Filters or filtering processes specially modified for separating dispersed particles from gases or vapours: particle separators, e.g. dust…
Y10T 428/1334
Hollow or container type article [e.g., tube, vase, etc.]: nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]

Family

US 6,521,697 B2Related patent
US 2001/0011447 A1This patent

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

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