MELT BLOWING PROCESS, LOW SHRINKAGE MELT BLOWN POLYMER FIBERS AND FIBROUS STRUCTURES, AND MELT BLOWABLE POLYMER COMPOSITIONS

摘要

A melt blowing process comprising: (a) providing a thermoplastic polymer material that includes at least one or a plurality of polyester polymers and at least one or a combination of different meltable metal phosphinates; and (b) melt blowing the thermoplastic polymer material into at least one fiber or a plurality of fibers, with each fiber having a diameter or thickness that is less than about 10 microns. The metal phosphinate is in an amount that (a) reduces the viscosity of the polyester polymer and (b) functions as a crystallizing agent, which at least promotes crystallization of the polyester polymer, when the thermoplastic polymer material is melt blown into the at least one fiber. Non-woven and woven fibrous structures can be made using fibers made from this process.

主权项

1. A process comprising:
(a) providing a thermoplastic polymer material comprising at least one or a plurality of polyester polymers and at least one or a combination of different meltable metal phosphinates; (b) melt blowing the thermoplastic polymer material into at least one fiber; and (c) heating the at least one fiber to a temperature equal to or above the glass transition temperature (Tg) of the polyester polymer, wherein the metal phosphinate is in an amount that at least promotes crystallization of the polyester polymer, when the thermoplastic polymer material is melt blown into the at least one fiber, and the polyester polymer of the at least one fiber is at least partially crystalline.