Patent ID: 7862671
Filing Date: 2011-01-04
Classification: B29C,B29K,B29L

Abstract:
1. A process of welding a polymeric material, the process, comprising: providing a first member having a surface wherein the first member and the surface are formed of a polymeric composition and the polymeric composition includes: i. thermoplastic polyolefin that includes a relatively high crystallinity portion having a crystallinity greater than about 65%, wherein the relatively high crystallinity portion includes one or more polypropylenes homopolymers, and the highly crystalline portion is at least 40% of the thermoplastic polyolefin; and ii. 10% to 25% by weight polyolefin elastomer, wherein the polyolefin elastomer is formed of one or more linear or substantially linear ethylene copolymers, wherein the one or more linear or substantially linear ethylene copolymers are copolymers consisting of ethylene and one or more α-olefin comonomers; wherein the polymeric composition includes less than about 1 weight percent of a calcined filler, or is without any calcined filler; providing a second member having a surface; heating and softening at least a portion of the polymeric composition the first member; contacting the portion of the polymeric composition with the second member and allowing the portion to cool and harden thereby forming a weld connecting the first member to the second member, the weld being at least partially formed of the polymeric composition.