7 results about "Flexural strength" patented technology

The invention discloses a wear-resistant engineering plastic. The wear-resistant engineering plastic is prepared from the following raw materials in parts by weight: 20-40 parts of polyethylene, 10-25 parts of polyvinylidene fluoride, 10-20 parts of polyurethane, 5-12 parts of phenolic resin, 10-20 parts of stearic acid, 3-10 parts of graphite, 1-5 parts of white carbon black, 2-10 parts of silicone rubber, 5-15 parts of ethylene-propylene-diene-terpolymer rubber, 0.5-5 parts of nanometer zirconium oxide, 0.5-3 parts of nanometer titanium dioxide and 1-6 parts of glass fiber. The prepared engineering plastic has significant and lasting wear-resistant effect and good mechanical property, the bending strength can reach over 130MPa, the tensile strength can reach over 110MPa and the wear rate is smaller than 0.8%.

A frame (extension frame) extending in a vehicle longitudinal direction on an outward side, in a vehicle width direction, of a powertrain mounted at a front portion of a vehicle includes front-side and rear-side high strength portions which are spaced apart, in the vehicle longitudinal direction, from each other and a low strength portion which is positioned, in the vehicle longitudinal direction, between the both high strength portions. The low strength portion has a lower bending strength than each of the both high strength portions. A specified portion which is a part of the low strength portion is positioned on the outward side, in the vehicle width direction, of and in front of a part of the powertrain (oil pan) which is located at the same level as the specified portion of the frame.

The invention relates to a preparation method of a silicon dioxide microsphere/polyformaldehyde composite material. The invention aims to solve the problems of low notch impact strength, shock strength and bending strength in the polyformaldehyde material. The preparation method comprises the following steps: 1. synthesizing monodisperse silicon dioxide spheres; 2. drying polyformaldehyde in a drying oven at 80 DEG C for 4 hours, adding the silicon dioxide microspheres and assistants, evenly mixing with a low-speed mixing machine, and extruding and granulating with a double screw extruder to obtain the silicon dioxide microsphere/polyformaldehyde composite material, thereby completing the preparation of the silicon dioxide microsphere/polyformaldehyde composite material. The invention is applied to the field of preparation of polyformaldehyde composite materials.

The invention belongs to the technical field of automobile part materials and particularly relates to anti-impact oil-resistant composite plastic used for automobile parts. The plastic comprises, by weight, 65-75 parts of nylon resin, 22-28 parts of high-density polyethylene, 12-16 parts of modified egg shell powder, 3-5 parts of bis(hydroxyethylaminoethyl) stearate, 6-10 parts of an organic metalcarboxylate compound, 2-4 parts of beta-C-6-sulfate-chitosan compound, and 1-3 parts of a plasticizer. Compared with the prior art, the egg shell powder is modified, then nylon resin is added to increase crystallization temperature; under the cooperation effect with other components, the plastic is greatly enhanced in anti-impact and oil-resistant performances and improved in bending strength andmodulus to certain degree, is not obvious in reduction on tensile strength, and can satisfy production demands when being applied to the automobile parts.

The invention discloses a high-modulus impact-resistant non-elastomer ternary blending composite pipe and a processing technology thereof.The high-modulus impact-resistant non-elastomer ternary blending composite pipe is prepared from, by weight, 65-90 parts of matrix resin, 5-10 parts of a compatibilizer, 10-30 parts of a non-elastomer and 0.5-1.5 parts of an antioxidant. According to the composite pipeline, the interface bonding force between the ultrahigh molecular weight polyethylene and the polypropylene is improved, so that a ternary blended composite material is formed, meanwhile, the tensile strength and the bending strength of the composite material can be enhanced, the composite pipeline can bear large impact force, the application range of the composite pipeline is enlarged, and the service life of the composite pipeline is prolonged to a certain extent.