44results about How to "Reduce low temperature resistance" patented technology

2499. The invention provides a multilayer coextrusion heat shrinking film which comprises a surface layer, a sandwich layer and a heat-sealing layer. The surface layer and the heat-sealing layer are respectively bonded with the sandwich layer through a bonding layer; the sandwich layer comprises a mixture composed of 98Wt% of PVDC resin and 2Wt% of processing aid, wherein, the PVDC resin is a VDC-MA copolymer, the melting point is 150 DEG C, the density is 1.7g / cm<3>, and the processing aid is epoxidized soybean oil or other plasticizing agent systems. The proposal increases the shrinkage factor of the multilayer coextrusion heat shrinking film, and improves the barrier property; the multilayer coextrusion heat shrinking film has excellent heat sealing performance, and is widely applied to the vacuum shrink package.

The invention provides a rubber combination, which is used for manufacturing rubber diaphragms. The combination comprises the following raw materials by weight percent: 25-47 percent of acrylonitrile butadiene rubber, 5-20 percent of second rubber selected from cis-butadiene rubber, butadiene styrene rubber, natural rubber and chloroprene rubber, 20-35 percent of low-temperature reinforcing agent, 1-3 percent of adhesive and the balance of other commonly-used additives. The rubber diaphragm prepared by the combination has the advantages that the oil resistance and the low temperature resistance are improved.

The invention discloses an oil agent for continuous spun viscose adhesive filaments, a preparation method and application thereof. The components of the oil agent are calculated by mass percentage: polyethylene glycol fatty acid ester 36-40%, fatty alcohol polyoxyethylene ether fatty acid ester 11-15%; polyether modified siloxane phosphate sodium salt 6-10% %, deionized water 35-39%. The oil agent prepared by the present invention has excellent performance, is easily soluble in water, is biodegradable, and is easy to remove oil, and can improve the cohesion force of viscose filaments, reduce the friction coefficient of fibers, fully suppress and eliminate the generation and accumulation of static electricity, and ensure that the textile Excellent process passability.

The invention discloses a production method of an environment-friendly modified polymer asphalt resin for road material waterproof coiled material. The method comprises the following steps: (1) according to the following percentages, the pretreated raw materials and additives are statically mixed in a tubular Mixing in the container; (2) Put the mixed material into the liner reactor for heating and stirring; (3) Seal the feeding port of the reactor, vacuumize the pressure at -0.06-0.08mpa, gradually increase the stirring speed as the temperature rises, and vacuumize The pressure is -0.09-0.1mpa, and when the temperature rises to 100°C, remove the water, stop vacuuming, and react for 4-5 hours at a reaction temperature of 180°C and a reaction pressure of 0.03-0.04MPa; (5) The material to be reacted becomes After the paste-like viscous body, the product is sampled and tested, and the asphalt resin product is obtained when the material is discharged. The invention effectively alleviates the pressure of environmental protection, effectively regenerates and recycles solidified waste, "turns waste into treasure", saves energy and reduces emissions, and protects the environment.

The invention discloses a long-service-life deep-cycle lead-acid battery positive grid alloy which is composed of the following raw materials in percentage by mass: 0.05-0.12% of calcium, 0.1-2.0% of tin, 0.01-0.1% of aluminum, 0.01-0.2% of zinc, 0.01-0.2% of silver and the balance of lead. The alloy has favorable corrosion resistance, and does not influence the deep cycle performance of the battery. The addition of the zinc can well enhance the deep cycle performance and low-temperature properties of the battery. The addition of the silver can enhance the corrosion resistance of the grid alloy; and the comparison between Figure 1 and Figure 2 indicates that the silver can be enriched at the grain sub-boundary and grain boundary along with the tin, and the silver enriched at the grain boundary can enhance the corrosion resistance of the grain boundary, thereby prolonging the service life of the alloy grid.

The invention discloses a preparation method of automobile paint, which belongs to the technical field of paint. The coating is composed of a main agent and a curing agent, and the main agent includes the following raw materials: polyaspartic resin, nano-titanium dioxide, water-based polyurethane resin, methacrylic acid, polyoxyethylene oleate, water, titanium dioxide, anti-settling agent , dispersant, leveling agent, defoamer, wetting agent, triethylamine, ethylene glycol butyl ether; the curing agent includes the following raw materials: isocyanate resin, catalyst. The invention is prepared through the steps of water-based polyurethane resin preparation, main agent preparation, mixing and the like. In the present invention, the reinforcing system composed of nano-titanium dioxide, water-based polyurethane resin, methacrylic acid, and polyoxyethylene oleate is used in the automotive coating of the present invention to improve the tensile strength, elongation at break, and low temperature resistance of the automotive coating. Sex, reduce paint fineness, improve paint stability.

Provided is a 24KV vacuum high-voltage circuit breaker equipped with a small modular spring operating mechanism. The circuit breaker includes a box body. A solid-sealed polar pole and a VSH small modular spring operating mechanism are arranged inside the box body. A vacuum interrupter is arranged inside the solid-sealed polar pole. An insulated pull rod is arranged at the bottom of the vacuum interrupter. A transmission shaft in the VSH small modular spring operating mechanism is connected with the insulated pull rod through a connecting rod and crank arm structure so the VSH small modular spring operating mechanism can drive the insulated pull rod and the vacuum interrupter to realize closing and opening. The VSH small modular spring operating mechanism is applied to the 24KV vacuum high-voltage circuit breaker. The spring operating mechanism and the vacuum interrupter are arranged up and down, which is different from the plane layout mode in the prior art in which the spring operating mechanism is scattered. Compared with the original mechanism, the size is reduced by 60%, the number of parts is reduced by 50%, and the total weight is reduced by 30%. The 24KV vacuum high-voltage circuit breaker has the advantages of long service life, no need for maintenance, no pollution, no danger of explosion, low noise, and the like, and is more suitable for frequent operation and other harsh working conditions.