40results about How to "Good rigidity balance" patented technology

The invention discloses a high-modulus and ultrahigh-impact polypropylene composite material and its preparation method. The composite material comprises 40-74wt% of polypropylene, 10-30wt% of an ultrafine inorganic filler, 15-30wt% of an elastomer flexibilizer, 0.1-2wt% of a stabilizer, and 0-5wt% of other additives. The preparation method comprises the following steps: carrying out dry mixing on raw materials in a high speed mixer for 3-15min, adding the mixed raw materials into a double screw extruder, carrying out melt extrusion, and carrying out cooling granulation. The preparation method has the following advantages:1, a ethylene-butylene copolymer is used as the elastomer flexibilizer, so the polypropylene composite material has better low temperature toughness than traditional toughening modified polypropylene; 2, ultrafine talcum powder is used as the inorganic filler, so the toughness loss can be reduced as much as possible, and the rigidness of the material is greatly improved; and 3, the synergistic effect of the ultrafine talcum powder and the elastomer flexibilizer is utilized, so the polypropylene composite material has more ideal rigidness-toughness balance than the traditional toughening modified polypropylene.

A toughened polyamide composition is prepared from polyamide and the rubber composition containing of powdered (not greater than 0.3 microns) rubber with cross-linking structure and at least one of unsulfurized rubber, thermoplastic elastomer and the thermoplastic elastomer grafted with polar monomer. Its advantages are controllable form and particle diameter, better toughness and machinability, and good strength and rigidity.

The invention discloses a high-performance polypropylene composite material for a vehicle seamless airbag instrument board, and a preparation method thereof, wherein the high-performance polypropylenecomposite material comprises the following raw materials by weight: 45-74%of polypropylene, 15-25% of an ultrafine inorganic filler, 10-20% of an elastomer toughening agent, 0.5-3% of a scratch-resistant aid, 0.1-2% of a stabilizer, and 0-5% of other additives. According to the present invention, through the synergistic action of the ultrafine inorganic filler and the special-structure elastomertoughening agent, the optimal balance between the rigidity and the ultrahigh toughness can be obtained, and the product integrates low-temperature impact resistance and heat deformation resistance, further has good scratch resistance, no sticking, low emission, continuous-illumination resistance, long-term heat resistance and the like, further has excellent processing property, and is suitable forvehicle hard plastic seamless airbag instrument boards and related components.

Each spoke portion includes spoke projecting threads on both sides thereof, and a reinforcing plate portion is formed so as to protrude from a side edge of each of the spoke projecting threads outward in a spoke widthwise direction. The reinforcing plate portion is formed continuously with an inter-spoke plate potion extended from a fitting portion of a disc flange portion to a wheel radially inner side, and forms an integral plate surface with the inter-spoke plate portion. With this configuration, it is possible to reduce imbalance of rigidity of the spoke portion in a radial direction, and to increase rigidity of an automobile wheel.

A rubberized fiber material is used in a belt reinforcing layer of a pneumatic tire, and comprises polyketone fibers having substantially a repeat unit represented by the following formula (I):

(wherein A is a moiety derived from an ethylenically unsaturated compound polymerized through ethylenic linkage, and may be same or different in repeat units) and a coating rubber covering the fibers, in which the coating rubber has a modulus at 100% elongation (room temperature) of not less than 2.5 MPa but not more than 5.5 MPa and a rebound resilience of not less than 60%. Also, a pneumatic tire comprises a belt reinforcing layer made from the rubberized fiber material.

The present invention relates to the field of polymers, particularly to a polypropylene composition, a polypropylene material, and applications of the polypropylene composition and the polypropylene material, wherein the polypropylene composition contains, by weight, 64-90% of anti-impact co-polypropylene, 9-35% of a thermoplastic elastomer, and 0.2-1.5% of an antioxidant. According to the presentinvention, the polypropylene material has advantages of good fluidity, good shrinkage, rigidity and toughness balance, heat aging resistance and environmental aging resistance, and cannot produce stress whitening after bending 90 DEG; and the polypropylene composition and/or the polypropylene material are particularly suitable for the preparation of pot seedling cultivation disks.

The present invention relates to the field of polymers, particularly to a polypropylene composition, a polypropylene material, and applications of the polypropylene composition and the polypropylene material, wherein the polypropylene composition contains, by weight, 64-90% of random co-polypropylene, 9-35% of a polyolefin elastomer, and 0.2-1.5% of an antioxidant. According to the present invention, the polypropylene material has advantages of good fluidity, good shrinkage, rigidity and toughness balance, heat aging resistance and environmental aging resistance, and cannot produce stress whitening after bending 90 DEG; and the polypropylene composition and/or the polypropylene material are particularly suitable for the preparation of pot seedling cultivation disks.

The invention provides a toughened polylactic acid composite material and a preparation method thereof. The toughened polylactic acid composite material comprises the following raw materials in parts by weight: 76-93 parts of polylactic resin, 5-20 parts of epoxidized starch core-shell particles, 0.5-2 parts of a nucleating agent and 1-2 parts of an antioxidant, the epoxidized starch core-shell particles are core-shell particles prepared by grafting and copolymerizing butyl acrylate and esterified modified starch by adopting an emulsion polymerization method, and the particle size is 200-500nm. The toughened polylactic acid composite material disclosed by the invention has relatively good biodegradable characteristic, the mechanical property is improved, and relatively good rigid-tough balance is obtained.

The invention discloses a resin composition for a transparent anti-static IC packaging tube. The resin composition is prepared from the following ingredients in parts by weight: 20 to 78 parts of methyl methacrylate-styrene resin, 20 to 78 parts of styrene-butadiene copolymers and 1 to 5 parts of anti-static agents. The resin composition for the transparent anti-static IC packaging tube uses methyl methacrylate-styrene (MS) as substrate resin, uses styrene-butadiene copolymers (SBC, also called as K glue) as a toughening agent for toughening, and has the advantages that the good rigidity and roughness balance is realized; the anti-static agents are added, so that the obtained resin composition has a good transparent effect and anti-static effects.

The invention relates to a filling modified polypropylene material and a preparation method thereof. The filling modified polypropylene material comprises the following components: co-polypropylene, aflexibilizer A, a flexibilizer B, mica powder, an antioxidant, a light stabilizer and a lubricant. Compared with the prior art, the polypropylene material has good permeability to 900-1100nm near-infrared light and can meet the requirements of laser welding; and more materials with different properties and good laser welding strength can be achieved through formula design due to the addition of the mica powder and the flexibilizer B, the performance bottleneck is broken through and the application field of the laser welding technology in plastic parts on automobiles is greatly broadened.

The invention belongs to the technical field of polymer flame retardance, and particularly relates to a high-impact flame-retardant polypropylene composite material for passenger car interior decoration and a preparation method of the high-impact flame-retardant polypropylene composite material. The high-impact flame-retardant polypropylene composite material is specifically prepared from the following raw materials in parts by weight: 40-70 parts of polypropylene, 5-20 parts of bromine-containing flame retardant, 1-5 parts of antimony trioxide, 5-20 parts of halogen-free intumescent flame retardant, 0.5-5 parts of aerogel powder, 0-15 parts of flexibilizer. and 0-40 parts of an inorganic filler. The flame-retardant polypropylene composite material obtained by the technical scheme of the invention has excellent mechanical properties, and the toughening agent is added, so that the material has excellent impact resistance, and can be used for parts such as instrument boards, stand columns and the like which need to be blasted; by adopting the nanoscale SiO2 aerogel, smoke in the combustion process of the composite material can be adsorbed, SiO2 can also play a role of a flame-retardant synergist and catalyze charring, the oxygen index and smoke density of flame-retardant polypropylene are synergistically improved, and the flame-retardant polypropylene can be used for passenger car interior materials.

There is provided a pneumatic radial tire for a motorcycle capable of developing an excellent steering stability in a high-speed cornering subjected to a large camber angle, and having an aspect ratio of 0.50-0.85, in which a tensile strength at break of a carcass ply cord is not less than 980 MPa, and an absolute value of a carcass total rigidity obtained by adding carcass rigidities of carcass plies is not less than 30000, and a tensile strength at break of a belt layer cord is not less than 2350 MPa, and an absolute value of a belt total rigidity obtained by adding belt rigidities of belt layers is not less than 170000, and an out-of-plane bending rigidity in widthwise direction of a tread portion is 0.40-0.70 kg/mm and an in-plane bending rigidity in peripheral direction thereof is 0.05-0.15 kg/mm and a bending rigidity ratio as a ratio of out-of-plane bending rigidity to in-plane bending rigidity is within a range of 4.20-9.10.