| 摘要 |
A method of producing self-supporting stratiform articles having a substrate layer (25) formed of a thermoplastic polymer composition and at least one surface portion formed by a layer (24) 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 (28) comprising the cover layer (24) and a thermoplastic shielding layer (26); the shielding layer (26) acts as a permeation barrier protecting the cover layer (24) against the hot polymer composition that will be injected for forming the substrate (25); the shielding layer (26) may also act as a shrinkage buffer; the preformed laminate (28) is substantially self-supporting and provides for safe positioning of its cover layer (24) at a desired portion of the female mould and, hence, of the final article; because the shielding layer (26) is formed of a material that is substantially compatible with the thermoplastic polymer composition of said substrate layer (25), i.e. can interfuse therewith, a firm bond between the cover layer (24) and the substrate (25) can be formed upon solidification. <IMAGE> |
