32results about How to "Reduce vulcanization efficiency" patented technology

The invention relates to a control cable for a flame-retardant fireproof boat and a manufacturing method thereof. Flame-retardant fireproof ethylene propylene rubber insulating layers are uniformly extruded on the peripheries of stranded copper conductors in a wrapping way to form control cable insulated cores; a plurality of control cable insulated cores are stranded mutually to form a control cable core; the periphery of the control cable core is coated with a low-intensity non-woven fabric longitudinally-covered layer; an inner jacket is extruded on the periphery of the low-intensity non-woven fabric longitudinally-covered layer in a wrapping way; the periphery of the inner jacket is coated with an armor braid; and an outer jacket is extruded on the periphery of the armor braid in a wrapping way. The cable disclosed by the invention adopts the low-intensity non-woven fabric longitudinally-covered layer of which the shape is completely in fit with that of each control cable insulated core, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the control cable insulated cores are eliminated, flame can be conveniently prevented from being spread and transferred inwards under the burning condition, and resistance to impregnation of humidity can be enhanced; and meanwhile, the low-intensity non-woven fabric longitudinally-covered layer can ensure that the inner jacket and the insulated cores are not adhered, so that the insulated cores are not damaged when the jacket is stripped in the constructing process.

The invention provides an epoxidized natural rubber composite material with self-repair function and a preparation method thereof, belonging to the technical field of composite materials. The epoxidized natural rubber composite material described in the present invention contains 100 parts of epoxidized natural rubber matrix, 1-3 parts of dicumyl peroxide, 1-40 parts of polyurethane, 1-2 parts of anti-aging agent, and 0.5 parts of ultraviolet absorber. ‑1 part, the above-mentioned number of parts is the number of parts by mass. The invention synthesizes UPy grafted polyurethane first, and then reacts it with rubber molecular chains to prepare a composite material with self-repair function. The prepared composite material can realize self-repair under the condition of complete end fracture, and also has good The strength and stability are high, and the preparation method is simple and the cost is low.

The invention relates to a salt corrosion resistant and twisting resistant double-shielded communication cable for ocean wind power and a manufacturing method of the communication cable. Each stranded copper conductor is wrapped in a salt corrosion resistant and twisting resistant extruded rubber insulation layer to form an insulated core; each two insulated cores are stranded to form a twisted pair of which the gaps are filled with fillers; each twisted pair is wrapped in a twisted pair copper foil shielding layer to form a twisted-pair group; the twisted-pair groups are mutually stranded to form a cable core; and the cable core is wrapped in a low-strength non-woven fabric longitudinal wrap, an inner sheath, a cable core copper foil shielding layer and an outer sheath in sequence from inside to outside. The communication cable provided by the invention adopts the low-strength non-woven fabric longitudinal wrap which completely fits the insulated cores in shape, so that gaps between the low-strength non-woven fabric longitudinal wrap and the insulated cores are eliminated, convenience is provided for stopping flame from spreading inwards under a combustion condition and the resistance to moisture impregnation is enhanced; and meanwhile, the low-strength non-woven fabric longitudinal wrap can ensure that the sheaths are not stuck to the insulated cores, and provides convenience for stripping the sheathes in a construction process without damaging the insulated cores.

The invention relates to a salt corrosion-resistant and torsion-resistant integral shielding telecommunication cable for offshore wind power and a manufacturing method of the integral shielding telecommunication cable. Salt corrosion-resistant and torsion-resistant rubber insulating layers are uniformly extruded on the peripheries of stranded copper conductors in a wrapping way to form insulated wire cores; the insulated wire cores are stranded in pair to form pair-twist wire pairs; gaps of the pair-twist wire pairs are filled with flame-retardant non-absorbent fiber fillers; a plurality of groups of pair-twist wire pairs are stranded to form a cable core; and the periphery of the cable core is coated with a low-intensity non-woven fabric longitudinally-covered layer, an inner jacket, a copper foil polyester composite belt shielding layer and an outer jacket sequentially from the inside out. The integral shielding telecommunication cable disclosed by the invention adopts the low-intensity non-woven fabric longitudinally-covered layer of which the shape is completely in fit with that of each insulated wire core, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the insulated wire cores are eliminated, flame can be conveniently prevented from being spread and transferred inwards under the burning condition, and resistance to impregnation of humidity can be enhanced; and meanwhile, the low-intensity non-woven fabric longitudinally-covered layer can ensure that the inner jacket and the insulated wire cores are not adhered, so that the insulated wire cores are not damaged when the inner jacket is stripped during construction.

The invention discloses a flame-retardant and fire-resistant cable insulation rubber for ships and a production method therefor. The raw materials are 20 parts of ethylene propylene diene monomer rubber 4045M, 0.5-0.6 part of vulcanizing agent DCP, 0.2-0.3 part of co-vulcanization agent TAC, 0.1-0.3 part of anti-aging agent MB, 0.1-0.3 part of anti-aging agent RD, 0.1-0.2 part of coupling agent A-172, 15-20 parts of aluminum hydroxide, 3-6 parts of ceramic glass powder, 1-1.5 parts of plasticizer No 1000 steam cylinder oil, 6-8 parts of fine talcum powder, 4-7 parts of reinforcing agent hydrated silica, and 5-8 parts of reinforcing agent calcined pottery clay. First, ethylene propylene diene monomer rubber 4045M is subjected to mixing for 1-1.5min, then the anti-aging agents, the coupling agent, aluminum hydroxide, the ceramic glass powder, the plasticizer, talcum powder and the reinforcing agents are added in order and after the above mixture is subjected to mixing for 7-8min, the mixture is unloaded and aired for above 24h; then the above rubber material is subjected to 2-3min, and the vulcanizing agent and the co-vulcanization agent are added in the last 20 seconds, the material after mixing is loaded in an open mill for thin-pass, after triangular packaging and square packaging are performed, sheets are obtained. The insulation rubber has simple production technology, low cost, small external diameter and light weight, is flexible and easy to bend, and is convenient for construction and installation.

The invention relates to a salt corrosion resistant and twisting resistant power cable for ocean wind power and a manufacturing method of the power cable. A stranded copper conductor is uniformly wrapped in a salt corrosion resistant and twisting resistant extruded rubber insulation layer to form a power cable insulated core; a plurality of power cable insulated cores are mutually stranded to form a power cable core; the power cable core is wrapped in a low-strength non-woven fabric longitudinal wrap on the periphery; and the low-strength non-woven fabric longitudinal wrap is wrapped in an extruded sheath. The power cable provided by the invention adopts the low-strength non-woven fabric longitudinal wrap which completely fits the power cable insulated cores in shape, so that gaps between the low-strength non-woven fabric longitudinal wrap and the power cable insulated cores are eliminated, convenience is provided for stopping flame from spreading inwards under a combustion condition and the resistance to moisture impregnation is enhanced; and meanwhile, the low-strength non-woven fabric longitudinal wrap can ensure that the sheath is not stuck to the insulated cores, and provides convenience for stripping the sheath in a construction process without damaging the insulated cores.