| 摘要 |
The embodiments disclosed herein relate to thermoplastic polymer compositions that comprise a thermoplastic and nucleating agents, such as silica-containing nucleating agents. The polymer compositions provide improved properties relating to processing, dimensional and thermal stability, improved crystalline structure, and flame retardant properties. The thermoplastic polymer compositions are useful, for example, for carpet backing applications. It is a further feature of the embodiments to provide carpet backing compositions and carpet tiles prepared using the thermoplastic polymer composition, as well as methods of making the carpet tiles. |
| 主权项 |
1. A carpet or carpet tile comprising:
a backing material which comprises a plurality of carpet backing yarns, carpet cloths or non-woven fabrics; and a carpet backing composition applied to the backing material and consisting of:
at least one thermoplastic polyester that is crystalline or semi-crystalline in nature and is present in the composition in an amount from 40 weight percent to 60 weight percent based on the total weight of the composition; anda nucleating agent providing nucleation sites therefor and that is ground glass, crushed glass, or mixtures or combinations thereof,
wherein the nucleating agent having has a particle size from about 40 mesh to about 250 mesh, and the nucleating agent is present in the carpet backing composition in an amount greater than 40 weight percent and up to about 60 weight percent based on the total weight of the carpet backing composition,wherein the carpet backing composition has at least one of the properties selected from the group consisting of an MT4 value of less than about 0.125 and a CT4 value of less than about 0.1, when measured according to the AACHEN Test, a surface tackiness disappearance time of less than about 1 hour, a time to backing rigidity of less than about 75 hours, a time to ignition of greater than about 13 seconds, and a time to self-extinguish of less than about 60 seconds. |
