Crimp enhancement additive for multicomponent filaments
CA 2303240 A1 · Owner: Marmon, Samuel E. · Inventors: Ning, Xin; Marmon, Samuel E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Spunbond multicomponent filaments and nonwoven webs made from the filaments are disclosed. In accordance with the present invention the multicomponent , filaments contain a crimp enhancement additive. Specifically the crimp , enhancement additive is added to one of the polymeric components in order to accelerate its solidification rate. The additive enhances crimp allows for , highly crimped filaments to be made at smaller deniers and produces low , density webs with improved stretch and cloth-like properties. Specifically the additive incorporated into the filaments is a nonionic surfactant such as an alkyl ether alkoxylate, a siloxane alkoxylate an ester of a polyalkylene , glycol, a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.