A preparation method of the polytetrafluoroethylene stretched film comprises: (1) uniformly mixing a modified polytetrafluoroethylene emulsion and a lubricant, and carrying out extrusion calendaring; and (2) longitudinally stretching and then transversely stretching at a high temperature, and sintering and curing at a high temperature for 5-15 minutes after stretching is completed, to obtain a product, namely the polytetrafluoroethylene stretched film. According to the method, a polymer AOI modified monomer is added, so that the prepared polytetrafluoroethylene stretched film is soft, good in tensile property, small in pore diameter, high in porosity and uniform in pore diameter distribution. In addition, an ammonium salt polymer dispersant is used as a preparation raw material, and a product of the ammonium salt polymer dispersant is green and clean, does not cause environmental pollution and does not participate in human metabolism.

A glass fiber-reinforced thermoplastic polymer composition comprising a sheathed continuous multifilament strand comprising a core that extends in the longitudinal direction and a polymer sheath which intimately surrounds said core, wherein the core comprises an impregnated continuous multifilament strand comprising at least one continuous glass multifilament strand, wherein the at least one continuous glass multifilament strand is impregnated with an impregnating agent, wherein the polymer sheath consists of a thermoplastic polymer composition comprising a thermoplastic polymer, wherein the impregnating agent comprises at least one of an aromatic phosphate ester, polyphosphonate, poly(phosphonate-co-carbonate).

Compounds and compositions are provided which are useful in additive printing, particularly additive printing techniques such as stereolithography (SLA) wherein a macromer is photopolymerized to form a manufactured article. Representative compounds comprise a polyaxial central core (CC) and 2-4 arms of the formula (A)-(B) or (B)-(A) extending from the central core, where at least one of the arms comprise a light-reactive functional group (Q) and (A) is the free-radical polymerization product from monomers selected from trimethylene carbonate (T) and -caprolactone (C), while (B) is the free-radical polymerization product from monomers selected from glycolide, lactide and p-dioxanone.

The instant disclosure relates to textile materials having an acid reactive functionalized polymer layer and a non-acid reactive functionalized layer coupled thereto. The acid reactive functionalized polymer layer may include: a polyamide polymer that captures and neutralizes acidic molecules; a hydrophilic polyether block amide copolymer; a maleic anhydride-grafted ethylene copolymer; and a non-halogenated flame retardant. The acid reactive functionalized polymer layer is fire resistant, acid neutralizing, and allows water vapor to transfer therethrough. The non-acid reactive functionalized layer and acid reactive functionalized polymer layer are free of per- and polyfluoroalkyl substances. The polyamide may include Nylon 12, Nylon 6, or Nylon 6,6 functionalized with an amine (e.g., a pyridine derivative and/or a halogenated-dimethylalkylamine) having a nitrogen that captures and neutralizes acidic molecules. The halogenated-dimethylalkylamine may include a general chemical formula of (CH.sub.3).sub.2NRX, where R is an alkyl containing 1-12 carbon atoms, and X is chlorine or bromine.

A polyamide 56 composition comprises a polyamide 56 resin and a polyolefin mold release additive. The polyamide 56 composition can be injection molded into articles.

Compounds and compositions are provided which are useful in additive printing, particularly additive printing techniques such as stereolithography (SLA) wherein a macromer is photopolymerized to form a manufactured article. Representative compounds comprise a polyaxial central core (CC) and 2-4 arms of the formula (A)-(B) or (B)-(A) extending from the central core, where at least one of the arms comprise a light-reactive functional group (Q) and (A) is the free-radical polymerization product from monomers selected from trimethylene carbonate (T) and -caprolactone (C), while (B) is the free-radical polymerization product from monomers selected from glycolide, lactide and p-dioxanone.

The present disclosure relates to a resin composition containing a (meth)acrylic polymer (A), a (meth)acrylic copolymer (B), and a rubbery graft polymer (C) having a crosslinked structure and/or a (meth)acrylic polymer (D).