Method of producing stratiform articles and products

Details Method of producing stratiform articles and products Method of producing stratiform articles and products

1993-10-07

2000-12-26

Ortiz, Angela

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264259, 264275, B29C 4514, B29C 6102

Patent

active

061654043

ABSTRACT:
A method of producing self-supporting stratiform articles having a substrate layer formed of a thermoplastic polymer composition and at least one surface portion formed by a layer made of a cover material, such as a textile; the method comprises: providing a mould cavity in conformity with the article that is to be produced and having a female cavity portion and a male cavity portion; the female cavity portion has at least one surface in conformity with the covered surface portion; the method according to the invention is characterized by providing, for each covered surface portion, a preformed laminate comprising the cover layer and a thermoplastic shielding layer; the shielding layer acts as a permeation barrier protecting the cover layer against the hot polymer composition that will be injected for forming the substrate; the shielding layer may also act as a shrinkage buffer; the preformed laminate is substantially self-supporting and provides for safe positioning of its cover layer at a desired portion of the female mould and, hence, of the final article; because the shielding layer is formed of a material that is substantially compatible with the thermoplastic polymer composition of said substrate layer, i.e. can interfuse therewith, a firm bond between the cover layer and the substrate can be formed upon solidification.

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