9results about How to "Excellent formability" patented technology

A heat-accumulating composition comprising a substance A and a polymer 2, the heat-accumulating composition having a melting peak temperature between 10 and 60°C and a melting enthalpy between 10 and 60°C of 30 J / g or more, the heat-accumulating composition not having an island-in-sea structure, or the heat-accumulating composition having an island-in-sea structure, the volume average equivalent circle particle diameter of the islands (dispersed phase) being 1.5 μm or less or the area ratio of the islands (dispersed phase) being 15% or less.

The invention belongs to the technical field of electric power engineering, and particularly relates to a composite layer material for a cable intermediate joint and a preparation method of the composite layer material. The composite layer material for the cable intermediate joint is composed of an inner semi-conductive layer, an insulating layer and an outer semi-conductive layer, the silicone rubber is prepared from the following raw materials: methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, trifluoropropyl methyl vinyl silicone rubber, a vulcanizing agent, an assistant crosslinker, an accelerant, diphenyl silanediol, an anti-aging agent, trifluoropropyl cage type silsesquioxane, and a mixture of modified nano hydroxyapatite and nano hectorite. According to the composite layer material for the cable intermediate joint, the three layers adopt the consistent siloxane main chain structure and vulcanization system, interlayer chemical compatibility is ensured, synchronous co-crosslinking is achieved, and by adjusting the silicone rubber composition and proportion of all the layers, the composite layer material can be applied to the cable intermediate joint. And it is ensured that the prepared composite layer material for the cable intermediate joint has excellent mechanical and hydrophobic water-blocking performance.

The application discloses a kind of plant polyphenol and maleic anhydride copolymer modified polyester and its preparation method, the modified polyester includes polyester, plant polyphenol and maleic anhydride copolymer.The preparation method includes that the plant polyphenol and maleic anhydride copolymer are dissolved in organic solvent, catalyst is added and mixed uniformly, and reaction liquid is obtained;The reaction liquid is heated to 25-80 DEG C, and is reacted under the condition of stirring for 4-16h, is cooled to room temperature, then is added in petroleum ether or ethyl acetate, and solid precipitate is separated out;Solid precipitate is filtered out and is washed with ethanol, and is dried, and antibacterial and antioxidant functional modified material is obtained;Antibacterial and antioxidant functional modified material is mixed with the polyester and is placed in high mixer, and is extruded again, and the modified polyester is obtained.The modified polyester material has the characteristics of good antibacterial and antioxidant performance, good processing performance, good tensile strength and toughness.

The invention discloses a preparation method of an aluminum foil blank for a high-strength 8021 battery soft package, and belongs to the technical field of aluminum alloy processing. According to the method, an 8021 alloy cast ingot serves as a raw material, hot rolling, segmented cold rolling, medium and low temperature intermediate annealing, finish rolling and other procedures are carried out, and the high-strength aluminum foil blank is prepared by optimizing rolling reduction distribution and roll surface roughness. The tensile strength of the obtained blank is larger than or equal to 170 MPa, the plasticity and the surface quality are excellent, the process energy consumption is lower, equipment does not need to be newly added, and the method is suitable for industrial production of the aluminum foil blank for the high-end soft package lithium battery aluminum-plastic film.

This invention relates to a method for preparing a high dielectric constant and low dielectric loss CCTO@NH2-rGO / PEI composite film material. The method first prepares a solution of aminated reduced graphene oxide supported on calcium copper titanate, then disperses PEI resin particles into the solution. After vacuum degassing and heating to remove DMAc solvent, a calcium copper titanate-supported aminated reduced graphene oxide / polyetherimide composite material (CCTO@NH2-rGO / PEI) is obtained. This invention modifies the aminated reduced graphene oxide with calcium copper titanate, allowing CCTO nanoparticles to be uniformly embedded in the layers of the aminated reduced graphene oxide. Then, the CCTO nanoparticles are composited with PEI, significantly improving the dielectric constant of PEI. This method effectively enhances the dielectric constant of the composite material while ensuring good processing performance of the PPO composite material and maintaining low dielectric loss.

The application belongs to the technical field of electric power engineering, and particularly relates to a composite layer material for cable intermediate joint and a preparation method thereof. The composite layer material for cable intermediate joint is composed of an inner semi-conductive layer, an insulating layer and an outer semi-conductive layer. The insulating layer is composed of the following raw materials: methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, trifluoro propyl methyl vinyl silicone rubber, vulcanizing agent, auxiliary cross-linking agent, accelerator, diphenyl silicone diol, anti-aging agent, trifluoro propyl cage type silsesquioxane, and a mixture of modified nano-hydroxyapatite and nano-laponite. The composite layer material for cable intermediate joint has a consistent siloxane main chain structure and vulcanization system in three layers, which ensures the chemical compatibility between layers and realizes synchronous co-crosslinking. By adjusting the composition and ratio of silicone rubber in each layer, the prepared composite layer material for cable intermediate joint has excellent mechanical and hydrophobic water-blocking properties.

The present invention provides an ethylene-vinyl alcohol copolymer having both moldability and gas barrier properties at high humidity. An ethylene-vinyl alcohol copolymer having a content of an ethylene structural unit of 20-60 mol%, the ethylene-vinyl alcohol copolymer having a structural unit (1) described below. [In structural unit (1), R1 is an alkyl group having 1-3 carbon atoms, and X is an alkylene group having 1-5 carbon atoms. ]

The application belongs to the technical field of resin materials for copper-clad plates, and particularly relates to a carbon-hydrogen resin composition for prepreg and a preparation method thereof. The carbon-hydrogen resin composition is prepared from the following raw materials in parts by mass: hyperbranched modified prepolymer resin 90-100 parts, inorganic filler 15-25 parts, silane coupling agent 0.2-0.4 parts, crosslinking agent 10-20 parts, initiator 0.8-1.5 parts, dibutyltin dilaurate 0.1-0.3 parts, antioxidant 0.5-1 part, and toluene 50-80 parts. The carbon-hydrogen resin composition prepared by the application has low dielectricity, high thermal conductivity, high heat resistance, high toughness, and excellent processing forming property.

The invention belongs to the technical field of friction materials and phenolic resin modification, and discloses a modified phenolic resin-based material for a high-temperature-resistant brake pad and a preparation method of the modified phenolic resin-based material. The modified phenolic resin-based material is prepared from the following components in parts by weight: 80 to 120 parts of novolac type phenolic resin, 8 to 30 parts of low-free hydroxymethyl resol type phenolic prepolymer containing a rigid bisphenol structural unit and 6 to 9 parts of hexamethylenetetramine, wherein the rigid bisphenol structural unit exists in the low-free hydroxymethyl resol type phenolic prepolymer in the form of a copolycondensation structural unit, and the obtained material still retains part of functional structural units which are not completely reacted after primary molding. The preparation method comprises the following steps: preparing a low-free hydroxymethyl resol type phenolic prepolymer through prepolymerization, mixing the low-free hydroxymethyl resol type phenolic prepolymer with novolac type phenolic resin, adding hexamethylenetetramine, and carrying out hot press molding and staged curing. The material has better high-temperature structural stability and heat fading resistance, and is suitable for a resin-based binding phase in a brake pad friction material.