摘要:
A bicomponent fiber wherein (a) the first component comprises from about 90 to 100 wt.% poly(trimethylene terephthalate) and (b) the second component is a polymer composition comprising (i) poly(trimethylene terephthalate) and (ii) polymer containing polyalkylene ether repeating units. Yarn, fiber, fabrics and carpets comprising the bicomponent fiber, as well as the process of making the bicomponent fiber, yarn, fabric, and carpet.
摘要:
A side-by-side or eccentric sheath-core bicomponent fiber wherein each component comprises a different poly(trimethylene terephthalate) composition and wherein at least one of the compositions comprises styrene polymer dispersed throughout the poly(trimethylene terephthalate), and preparation and use thereof.
摘要:
The present invention provides a heat-sealable polyester composition having an amorphous processing window ranging from a Tg in the range of about 40°C to about 70°C, to a Tcg in the range of about 70°C to about 150°C. The composition preferably contains a mixture of poly(ethylene terephthalate) homopolymer or copolymer and poly(trimethylene terephthalate) homopolymer or copolymer, either as a physical blend or as a copolyester oligomer or polymer prepared from the respective monomers. The resulting composition is heat-sealable at low temperatures, retains barrier properties and is non-flavor-scalping.
摘要:
A process for making a high viscosity poly(trimethylene terephthalate) (PTT) resin having a low cyclic dimer content of less than or equal to 1.1 wt % as determined with nuclear magnetic resonance analysis and an intrinsic viscosity in the range of 0.9 to 2.0 dL/g; the PTT resin composition provided by the process; and molded articles derived from the composition are disclosed.
摘要:
A shaped article comprising poly[(alkylene-co-dianhydrosugar ester) dicarboxylate] or poly(alkylene-co-dianhydro-dicarboxylate) having improved stability in the form of less change of Tg and reduced shrinkage upon storage at elevated temperature is disclosed.
摘要:
The present invention relates to processes for manufacturing polyesters. The processes can be used for manufacturing polyesters from post-consumer polyesters. The processes include contacting a post-consumer polyester with at least one diol, at elevated temperature in presence of a catalyst, effecting a transesterification reaction. Biologically-derived diols can be used.
摘要:
A process for preparing poly(trimethylene terephthalate) fibers comprising (a) providing a poly(trimethylene terephthalate) composition comprising about 0.05 to about 5 mole % tetramethylene terephthalate repeat units and (b) spinning the polymer composition to form fibers. Poly(trimethylene terephthalate) fiber comprising poly(trimethylene terephthalate) composition comprising about 0.05 to about 5 mole % tetramethylene terephthalate repeat units, as well as yarns, fabrics (e.g., woven, knitted, and nonwoven fabrics) and carpets. A poly(trimethylene terephthalate) composition comprising about 0.05 to about 5 mole % tetramethylene terephthalate repeat units.
摘要:
The invention relates to the preparation of poly(trimethylene terephthalate) polymer pellets with reduced oligomers and a process for measuring the reduction of oligomers in PTT polymer which occurs when the polymer is subjected to a heat source. This reduction allows for lower polymer blooming due to reduction of oligomers in the polymer.
摘要:
Processes for making elastomeric polyether esters from polyesters and polyols are provided. The processes can offer a reduction in manufacturing cost, energy use and a lower environmental footprint than conventional processes, particularly when the processes utilize post-consumer polyesters as starting materials.