![]() ![]() According to the disclosed process, the thermoplastic material is extruded in the molten state onto a moving belt or The resulting product is reported to have a velour-like or velvety surface with numerous solid fibrous projections which can be longer than 3 millimeters. International Patent Application WO 97/02128 provides a process for producing a surface-structured, sheet-like semi-finished product made from thermoplastic polymers. The patent discloses extruded films which due to melt fracture show a rough surface texture. 5,814,413 surface-texturing of a polymer film is accomplished by taking advantage of the usually undesired phenomenon of melt fracture. Non-apertured surface structured films include films with solid or with hollow surface structures.Īccording to U.S. 5,733,628 discloses a film laminate comprising an elastomeric three- dimensional apertured film and a carrier material wherein the carrier material may be a woven or non-woven fibrous material. The high pressure fluid jet causes micro-aperturing of those portions of the web which coincide with the interstices between the intersecting woven wire filaments comprising the support member and which correspond to the surface aberrations after removal of the web. The web is produced by impinging a jet of high pressure liquid on the exposed surface of a web of flat polymeric film while said film is supported on a fine mesh woven wire support member. 4,629,643 provides a micro-apertured polymeric web exhibiting a pattern of discrete volcano-like aberrations, the end of which includes at least one micro-aperture at its point of maximum amplitude. ![]() To improve aesthetics, several techniques of surface modification resulting in various surface structures have been employed. Plastic articles and items with a pleasant haptic appearance, such as a textile-like touch, and good optics are desirable for numerous applications. The invention also provides a process and a device to make such profile or molding, uses thereof, as well as articles of manufacture made therefrom. PROFILE OR MOLDING HAVING A FRINGED SURFACE STRUCTUREįIELD OF THE INVENTION This invention relates to a surface having a fringed microstructure and to a profile or molding characterized in that it comprises a fringed surface microstructure. ![]() Use of a thermoplastic material according to claim 46 which is biodegradable, preferably poly(lactide). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |