The present invention is related to expandable vinyl aromatic polymers comprising comminuted coke, said comminuted coke having an average stack height (Lc) of carbon crystallites less than 4 nm, a volume median particle diameter (D50) comprised between 0.8 and 4 m and being characterized by a span (D90D10)/D50 below 2.5. Molded parts produced from the expandable vinyl aromatic polymers prove low thermal conductivities for a low foam density.

The present invention relates to biaxially oriented polyester films having a release coating of polyolefin wax on at least one side as release film for applying thin polyacrylate layers from organic solvents by means of a printing process. The invention further relates to a method for producing such films and also to their use.

In one aspect, a foamable composition is disclosed, which comprises a base polymer, talc and a citrate compound blended with the base polymer. In some embodiments, the concentration of the talc in the composition is in a range of about 0.05% to about 25% by weight, e.g., in a range of about 2% to about 20%, or in a range of about 3% to about 15%, or in a range of about 5% to about 10%. Further, the concentration of the citrate compound in the composition can be, for example, in a range of about 0.05% to about 3% by weight, or in a range of about 0.02% to about 0.9% by weight, or in a range of about 0.03% to about 0.8% by weight, or in a range of about 0.04% to about 0.7% by weight, or in a range of about 0.05% to about 0.6% by weight

A fiber reinforced thermoplastic resin molding material includes a thermoplastic resin; a resin impregnated reinforcing fiber filament obtained by impregnating reinforcing fibers with a resin having a melt viscosity at 200 C. lower than a melt viscosity of the thermoplastic resin; and a reinforcing fiber modifier having a melt viscosity at 200 C. lower than the melt viscosity of the thermoplastic resin and a difference in solubility parameter value from the thermoplastic resin equal to or larger than 1.0, the molding material including 50 to 98.9 parts by weight of the thermoplastic resin; 1 to 40 parts by weight of the reinforcing fiber; 0.1 to 10 parts by weight of the reinforcing fiber modifier; and 0.2 to 12 parts by weight of the resin relative to total 100 parts by weight of the thermoplastic resin, the reinforcing fiber, and the reinforcing fiber modifier.

The invention relates to a method for manufacturing a pellet in a pellet mill, which method comprises the steps of (A) pressing a mixture for compaction by a roller through a nozzle to obtain a strand, and (B) comminuting the strand to obtain the pellet, wherein the mixture for compaction comprises (i) 87 to 97 wt. % of a polymer stabilizer mixture polymer stabilizer mixture, which comprises the polymer stabilizers (i-1) 62 to 72 wt. % of tris(2,4-ditert-butylphenyl) phosphite (CAS-No. 31570-04-4), (i-2) 28 to 38 wt. % of tetrakis-[3-(3,5-ditert-butyl-4-hydroxy-phenyl)-propionyloxymethyl]me-thane (CAS-No. 6683-19-8), and wt. % of the polymer stabilizers (i-1) and (i-2) are based on the weight of the polymer stabilizer mixture, and (ii) 3 to 13 wt. % of a processing aid, which is a polyethylene and which possesses a weight average molecular weight above 2500 Da and below 16000 Da. The pellet is useful for a dust-free handling of its polymer stabilizer mixture at a manufacturing of a stabilized polymer. Furthermore, a method for stabilizing a polymer, which is a polyolefin, a polystyrene or a mixture thereof, is disclosed, which comprises the dosing of the pellet to the polymer.

An improved method forms and employs a wax to modify throughputs and melt flow in polymers. The method includes: (a) selecting a solid polymeric material, (b) heating the solid polymeric material in an extruder to produce a molten polymeric material, (c) filtering the molten polymeric material, (d) placing the molten polymeric material through a chemical depolymerization process in a reactor to produce a depolymerized polymeric material, and (e) adding the depolymerized material to a pre-wax mixture to produce a modified polymer.

The present disclosure provides an all-steel tire with 100% definite elongations of an upper tread and a lower tread being interrelated to each other. The all-steel tire of the present disclosure includes a lower tread rubber layer B and an upper tread rubber layer A. Through repeated multiple experiments of the applicant, when a ratio of stresses at 100% definite elongation of the upper tread rubber layer A to the lower tread rubber layer B is (0.7-0.8):1, and the 100% stress at definite elongation of the lower tread rubber layer B is 3.2-5.5 Mpa, it can be ensured that after any tread of the tire is subjected to performance adjustment, the performance balance of the whole tire crown is continuously maintained, so that no new problem is generated after the tread performance of the all-steel radial tire is improved.

A method for producing a film including at least 20 wt % thermoplastic polymer and 50 to 75 wt % inorganic filler, and including the steps of: providing the mixture, melting the mixture, producing a thin layer from the mixture, cooling the thin layer, producing a film, stretching the film in the longitudinal direction and in the transverse direction, wherein the particle size of the inorganic filler is at most 5 ?m and the stretch ratio in the longitudinal direction and in the transverse direction is at least 3.5. The disclosure further relates to films produced by the method and to the use thereof.

Provided is a separator including a first layer which consists of a porous polyolefin and a secondary battery utilizing the separator. A first layer exhibits a minimum height equal to or more than 50 cm and equal to or less than 150 cm when a ball having a diameter of 14.3 mm and a weight of 11.9 g located over the first layer is allowed to free fall causing a split in the first layer. A tearing strength of the first layer in a width direction, measured with an Elmendorf tearing method, is equal to or more than 1.5 mN/m. A tensile elongation of the first layer is equal to or longer than 0.5 mm until a load decreases to 25% of a maximum load in a load-elongation curve in machine direction measured by a rectangular tearing method.

Provided is a separator including a separator which consists of a porous polyolefin of 95 wt % or more and an organic additive. A temperature-increase convergence time of the first layer is equal to or longer than 2.9 s.Math.m.sup.2/g and equal to or shorter than 5.7 s.Math.m.sup.2/g when the first layer is irradiated with a microwave having a frequency of 2455 MHz and an output power of 1800 W after dipping the first layer in N-methylpyrrolidone containing 3 wt % of water, whereas a white index is equal to or more than 86 and equal to or less than 98.