Use of a microcrystalline polyamide to obtain a particular...

Details Use of a microcrystalline polyamide to obtain a particular... Use of a microcrystalline polyamide to obtain a particular...

2005-06-22

2010-11-16

Woodward, Ana L (Department: 1796)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S171100, C264S171230, C264S173190, C264S175000, C264S176100, C264S177190, C264S345000, C428S474400, C525S066000, C525S179000, C525S183000, C525S184000, C525S432000

Reexamination Certificate

active

07833450

ABSTRACT:
The present invention relates to the use of a microcrystalline polyamide for obtaining an object having all or part of its outer surface formed from this microcrystalline polyamide and having a particular surface finish, in which:the manufacture of the object comprises steps carried out hot between the Tg(glass transition temperature) and the Tm(melting point) of this microcrystalline polyamide;the transparency of the microcrystalline polyamide is such that the light transmission at 560 nm on a polished object 1 mm in thickness is greater than 80%, advantageously greater than 88%, the transparency being measured on the object obtained by standard processing methods, such as injection moulding and sheet extrusion/calendering.

REFERENCES:
patent: 2002/0173596 (2002-11-01), Montanari et al.
patent: 2002/0179888 (2002-12-01), Montanari et al.
patent: 0628602 (2001-10-01), None

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