3results about How to "The preparation process is highly controllable" patented technology

The invention discloses an oil-resistant cold-resistant flame-retardant polyvinyl chloride material and a preparation method thereof. The polyvinyl chloride material is prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 40-60 parts of a plasticizer, 30-50 parts of a flame retardant, 15-25 parts of a cold-resistant agent, 10-20 parts of an oil-resistant agent, 5-10 parts of a heat stabilizer and 2-5 parts of a lubricant. Wherein the flame retardant is a composite flame retardant composed of aluminum hydroxide, magnesium hydroxide and antimony trioxide, the cold-resistant agent is an ethylene terpolymer, and the oil-resistant agent is a polar copolymer of acrylonitrile and butadiene. The material is excellent in comprehensive performance, the low-temperature impact performance can pass minus 40 DEG C, after an oil resistance test, the mechanical property loss is extremely small, the oxygen index is maintained to be about 30%, the stable mechanical property and thermal stability are achieved, collaborative optimization of oil resistance, cold resistance and flame retardance is achieved, and the service life of the material is prolonged. The cable is suitable for cable preparation under complex working conditions such as automobile engine cabins, industrial equipment in extremely cold areas and petrochemical engineering, the preparation process is high in controllability, and industrial production is easy.

The invention discloses a high-temperature-resistant honeycomb composite protection plate for an armored car shell and a preparation method of the high-temperature-resistant honeycomb composite protection plate, relates to the technical field of armor protection, and solves the technical problems that the bulletproof performance and the metal jet flow prevention performance of an existing armor plate are difficult to consider, the high-temperature-resistant stability is insufficient, and the adaptability of a preparation process is poor. The protection plate is composed of a surface layer (1) made of a high-strength alloy steel plate, an inner layer (2), an antinode rib plate array (3) and a high-temperature-resistant functional mortar filling layer (4), a honeycomb supporting structure is formed through array type welding, and customized high-temperature-resistant functional mortar is filled in a cavity; the preparation method comprises the steps of pretreatment, honeycomb skeleton forming, mortar customization preparation, pouring filling, curing, accurate performance detection and the like. Through collaborative innovation of structure-material-process, comprehensive optimization of bulletproof, metal jet prevention, high temperature resistance and light weight is realized. The device is suitable for protecting shells of armored cars and amphibious armored cars, and the safety survivability of equipment is remarkably improved.

The invention relates to a preparation method of a wear-resistant boron nitride reinforced copper-based composite material with high electric conductivity and heat conductivity, and belongs to the technical field of composite material preparation. According to the method, high-purity cathode copper serves as a raw material, and the copper foil with the specific thickness is prepared through the pretreatment processes of smelting, rolling, annealing and the like. And then respectively carrying out surface pretreatment on the two-dimensional boron nitride nanosheet (BNNS) and the copper foil, and further uniformly depositing a BNNS enhancement layer on the surface of the copper foil by adopting a cold spraying technology. And finally, after the copper foil deposited with the BNNS reinforcing layer is subjected to multi-layer stacking and block addition, densification and interface strengthening of the composite material are achieved through a hot isostatic pressing technology, and the BNNS / Cu composite material which is uniform and compact in structure, good in BNNS dispersion and excellent in interface bonding is finally obtained. The preparation method is controllable in process and high in practicability, the prepared copper-based composite material has outstanding heat conduction and wear resistance on the basis that the excellent electrical conductivity of a copper matrix is kept, and technical guidance is provided for research in the fields of pantograph slide plate material preparation and the like.