1349 results about "Low-density polyethylene" patented technology

The invention relates to the technical field of polymeric membrane materials, and particularly discloses an antistatic polyethylene composite membrane and a preparation method thereof. Comprising the following raw materials in parts by weight: 100 parts of low-density polyethylene, 5-9 parts of high-density polyethylene, 10-20 parts of maleic anhydride grafted polyethylene, 8-15 parts of a polyvinyl alcohol modified material, 3-5 parts of antistatic modified carbon black, 0.5-1 part of an antioxidant and 1-2 parts of a dispersing agent, the polyethylene composite film has excellent dispersibility, can effectively enhance the mechanical properties of the polyethylene composite film through the synergistic effect of physical filling and chemical grafting, forms a layer of conductive network structure, namely a conductive film, on the surface of the material through the combined effect of the polyethylene composite film and the antistatic agent, prevents the generation and accumulation of static electricity, and has good compatibility among the raw materials. And the material has excellent mechanical property and antistatic property.

The invention relates to the technical field of composite film preparation, in particular to a multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film and a preparation method thereof.The multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film comprises a base material layer, a gas barrier layer, a bonding transition layer and a nano ceramic functional coating; the base material layer comprises the following components in parts by mass: 80-100 parts of biaxially oriented polypropylene; 20 to 30 parts of metallocene linear low density polyethylene; 5 to 8 parts of nano titanium dioxide; 0.5 to 1 part of beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid; and 0.3 to 0.6 part of calcium stearate. Through the multi-layer co-extrusion and gradient curing technology and the five-layer co-extrusion technology, it is ensured that the thickness of a base film is uniform and interlayer bonding is firm, the adhesive force of the coating is enhanced through plasma surface treatment, and activity retention and uniform distribution of functional components are guaranteed through the segmented curing strategy of the nano ceramic coating; compared with a traditional hot-pressing compounding or solvent coating process of the composite film, the energy consumption and the solvent residue risk are greatly reduced, meanwhile, the production efficiency and the product consistency are improved, and large-scale application is provided for medicine packaging.

The invention provides a tear-resistant, wear-resistant, low-smoke and non-dripping sheath material as well as a preparation method and application thereof. The tear-resistant wear-resistant low-smoke non-dripping sheath material is prepared from the following components in parts by weight: 25 to 35 parts of metallocene linear low-density polyethylene, 10 to 15 parts of ethylene-vinyl acetate copolymer, 6 to 8 parts of compatilizer, 50 to 60 parts of aluminum hydroxide, 10 to 15 parts of magnesium hydroxide, 3 to 4 parts of microencapsulated red phosphorus, 5 to 8 parts of lithium oxide synergist, 4 to 6 parts of silicone master batch, 0.3 to 0.7 part of carbon black master batch and 1.5 to 2.5 parts of coupling agent. The tear-resistant wear-resistant low-smoke non-dripping sheath material provided by the invention has the characteristics of being halogen-free, flame-retardant, tear-resistant and wear-resistant, and a low-smoke halogen-free flame-retardant power cable prepared from the sheath material has the characteristics of high smoke light transmittance during combustion, no dripping and cracking resistance.

The invention relates to the technical field of packaging films, and particularly discloses a heat-resistant polyethylene composite packaging film and a preparation method thereof.The polyethylene composite packaging film comprises an inner layer, a middle layer and an outer layer, the inner layer is prepared from, by mass, 100 parts of linear low-density polyethylene, 28-32 parts of polypropylene and 8-10 parts of hydrotalcite modified blending materials, the middle layer comprises the following raw materials in parts by weight: 100 parts of low-density polyethylene, 40-60 parts of linear low-density polyethylene, 3-5 parts of a coupling agent and 0.5-1 part of an antioxidant, the outer layer comprises the following raw materials in parts by weight: 100 parts of modified PA6, 20-30 parts of metallocene polyethylene and 5-8 parts of a compatilizer, functional gradient distribution is realized by adopting layered extrusion of three-layer co-extrusion, and PA6 and polypropylene have a synergistic effect, so that the composite film has excellent heat resistance, and the service life of the composite film is prolonged. The hydrotalcite and the graphene oxide have a synergistic effect, the layered structure effectively obstructs oxygen and water vapor, and the obtained polyethylene composite packaging film is good in barrier property and has excellent mechanical property and heat resistance.

The invention discloses an anti-freezing PE (polyethylene) film, a composite film of the anti-freezing PE film and a related preparation method, relates to the field of packaging films, and aims to solve the problem of low freezing resistance and puncture resistance in the prior art. Comprising anti-freezing layer components: low-density polyethylene, high-density polyethylene, metallocene linear low-density polyethylene resin, cold-resistant PA66 resin, composite phosphate, olefin block copolymer resin, a modified nanoscale silicon oxide coupling agent and a nanoparticle toughening agent, and barrier layer components: low-density polyethylene, linear low-density polyethylene and high-density polyethylene. The toughening heat-sealing layer comprises the following components: low-density polyethylene, sarin resin, metallocene linear low-density polyethylene resin, EVA (Ethylene Vinyl Acetate) modified bonding resin, a slipping agent, a nanoparticle toughening agent, a modified nanoscale silicon oxide coupling agent, dioctyl adipate and an antioxidant. The composite material can resist-38 DEG C ultra-low temperature freezing, and is puncture-resistant, cold-resistant and excellent in barrier property.

The invention discloses a polyethylene cable with flexibility and fire resistance and a preparation method of the polyethylene cable, and relates to the technical field of polyethylene cables, the polyethylene cable comprises a cable core and a polyethylene protective sleeve, the polyethylene protective sleeve comprises the following components, the plastic is prepared from the following components in parts by mass: 50 to 70 parts of low-density polyethylene, 20 to 30 parts of modified polyolefin elastomer, 10 to 25 parts of lignin modified copolymer, 0.5 to 1 part of antioxidant, 0.6 to 1.2 parts of zinc oxide and 1 to 2 parts of talcum powder. The modified polyolefin elastomer is prepared from POE-g-MAH (Polyolefin Elastomer-g-MAH) and a DOPO Schiff base derivative; the lignin modified copolymer is prepared from lauryl methacrylate, isobornyl methacrylate and a lignin macroinitiator.

The invention discloses a crosslinked polyethylene reinforced high-strength insulating aerial cable, and belongs to the technical field of crosslinked polyethylene cable materials.The crosslinked polyethylene reinforced high-strength insulating aerial cable is prepared by the steps that hydroxyl is introduced to nano boron nitride powder, then amino is grafted through KH-550, nano alpha-Al2O3 powder is modified through gamma-glycidyl ether oxypropyl trimethoxy silane, and the cross-linked polyethylene reinforced high-strength insulating aerial cable is obtained; the preparation method comprises the following steps: preparing low-density polyethylene, compounding the low-density polyethylene with aminated nano boron nitride powder to form nano composite powder, improving the interface bonding force between the low-density polyethylene and the nano composite powder, carrying out melt blending on the low-density polyethylene and the nano composite powder to improve the dispersity of the nano composite powder in the low-density polyethylene, and carrying out nucleophilic acyl substitution reaction to obtain a fluorine-containing modified monomer. The nano boron nitride powder and the nano alpha-Al2O3 powder are subjected to a cross-linking reaction under the initiation action of an initiator and then coat the exterior of the thermal insulation layer, and the nano boron nitride powder and the nano alpha-Al2O3 powder are bridged through siloxane bonds to form a three-dimensional heat-conducting network, so that the heat resistance of the outer insulating layer is improved.

The invention relates to the technical field of cables, in particular to a low-smoke halogen-free fireproof cable which comprises an outer sheath. The outer sheath is prepared from the following raw materials in parts by weight: 40 to 60 parts of low-density polyethylene, 20 to 30 parts of EVA resin, 10 to 20 parts of SEBS elastomer, 5 to 10 parts of POE-g-GMA, 5 to 10 parts of flame retardant, 15 to 30 parts of filler and 1 to 5 parts of additive; the flame retardant is composed of an organic component and a spinel type metal oxide; the organic components comprise a DOPO derivative and a nitrogen flame retardant, the prepared outer sheath granules have excellent mechanical properties and excellent fireproof and flame retardant properties, not only are high in flame retardant rating, but also are small in heat and smoke yield after combustion, and are excellent materials for preparing low-smoke halogen-free fireproof cables.

The invention discloses a weather-resistant flame-retardant crosslinked polyethylene insulating material, a cable material and a preparation method. The weather-resistant flame-retardant crosslinked polyethylene insulating material comprises the following components in parts by mass: 60-70 parts of linear low-density polyethylene (LLDPE), 20-25 parts of low-density polyethylene (LDPE) and 15-20 parts of a copolymerization mixture, the copolymerization mixture is prepared from a styrene-ethylene / butylene-styrene block copolymer (SEBS) and styrene-ethylene / butylene-styrene block copolymer grafted maleic anhydride (SEBS-g-MAH). The cable material disclosed by the invention not only can give consideration to the flame-retardant characteristic and light aging resistance of a cable insulating material, but also can inhibit the damage of moisture to the insulating material under an alternating electric field, reduce the moisture entering the insulating material in a natural environment, and improve the water tree resistance of the material.

The invention relates to the technical field of cable materials, and provides a flexible EVA cable sheath material and a preparation method thereof. The cable sheath material is prepared from the following raw materials in parts by weight: 25 to 50 parts of ethylene-vinyl acetate copolymer EVA, 15 to 30 parts of ultra-low density polyethylene, 2 to 10 parts of grafted EVA, 2 to 10 parts of flame retardant, 2 to 10 parts of polydopamine modified montmorillonite-boron nitride fiber composite material, 0.5 to 3 parts of flexibilizer, 0.2 to 1 part of silicone and 0.2 to 1 part of organopolysiloxane. A grafting monomer for grafting EVA comprises maleic anhydride and / or an acrylate compound; the polydopamine modified montmorillonite-boron nitride fiber composite material is prepared from montmorillonite, boron nitride fibers, hydroxylated lignin, dopamine hydrochloride and polyethyleneimine through a reaction. Various functional raw materials are compounded, and the obtained cable sheath has good flexibility, flame retardance, thermal deformation resistance, aging resistance and mechanical performance.

The invention discloses a temperature-resistant and wear-resistant three-layer insulated wire and a preparation method thereof, and relates to the technical field of cables. The preparation method comprises the following steps: extruding the inner layer material on the surface of the conductor material to form the inner insulating layer, extruding the modified silicone rubber on the surface of the inner insulating layer to form the middle layer, extruding the outer layer material on the surface of the middle layer to form the outer insulating layer, and curing to obtain the high-temperature-resistant flame-retardant cable material. Wherein the inner-layer material is prepared from low-density polyethylene, an antioxidant 1010, insulating particles, a voltage stabilizer and the like; the modified silicone rubber is prepared from silicone rubber, a boron nitride compound, modified magnesium oxide and the like; the outer-layer material is prepared from the inner-layer material and a boron nitride compound. Due to the introduction of the components such as the insulating particles, the voltage stabilizer and the boron nitride compound, the high voltage resistance, the aging resistance, the wear resistance and the temperature resistance of the crosslinked polyethylene insulated power cable are effectively improved. Therefore, the method has a wide application prospect.

The invention discloses a halogen-free flame-retardant environment-friendly heat-resistant cable and a preparation method thereof, belongs to the technical field of cable material processing, and is used for solving the technical problem that the mechanical strength and heat resistance of a halogen-free flame-retardant environment-friendly cable in the prior art need to be further improved. The cable comprises a plurality of cable conductors, a wrapping layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer comprises the following components in parts by weight: 70-80 parts of low-density polyethylene, 20-30 parts of modified polysiloxane, 10-16 parts of modified polyvinyl alcohol, 15-18 parts of modified kaolin, 2-3 parts of an initiator and 3-4 parts of an auxiliary additive. Low-density polyethylene is reinforced and modified through modified kaolin, modified polyvinyl alcohol and modified polysiloxane, so that not only are the mechanical strength and flame retardance of the environment-friendly heat-resistant cable effectively improved, but also the high-temperature resistance of the cable is improved, and the service life of the cable in a high-temperature environment is prolonged.

The invention relates to the field of cables, and discloses a modified polyvinyl chloride composite material for cables and a preparation method thereof.The composite material comprises low-density polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, nitrile rubber, modified graphene oxide, modified nano calcium carbonate and auxiliaries; the modified graphene oxide is prepared by reacting acylating chlorination of graphene oxide with an anti-aging derivative, the anti-aging derivative is prepared by reducing a benzoxazole-containing intermediate generated by a reaction of 2-amino-4-bromophenol and 4-cyanobenzaldehyde to obtain an aminated benzoxazole-containing intermediate, then the aminated benzoxazole-containing intermediate reacts with p-phenylenediamine, and then the product reacts with 3-(3, 4-dichlorophenyl)-1, 2, 3-triazole-3-one to obtain the anti-aging graphene oxide. 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride is subjected to a reaction to prepare the product. And the modified nano calcium carbonate is prepared by reacting phosphonitrilic chloride trimer with an amino silane coupling agent and 2-amino benzoxazole-5-borate and then grafting on the surface of the nano calcium carbonate. The composite material prepared by the invention has excellent flame retardance, heat resistance and long-acting oxidation resistance.

The invention relates to the technical field of research and development of BIB liquid packaging materials, and discloses a PE-PA-based composite film, a manufacturing process and an application in BIB liquid packaging, and specifically comprises the following steps: synthesizing a PE-PA compatilizer; the preparation method comprises the following steps: carrying out ring-opening reaction on an epoxy functional group of a PE-PA compatilizer and an amino functional group or a carboxyl functional group at a PA resin molecular chain end to prepare PE-PA compatilizer grafted nylon resin, and carrying out physical anchoring action on a long-chain alkane structure on the PE-PA compatilizer grafted nylon resin and a PE resin molecular chain to prepare the PE-PA alloy master batch; low-density polyethylene resin is used as a raw material of a supporting layer, PE-PA alloy master batch is used as a raw material of a functional layer, metallocene polyethylene resin is used as a raw material of a heat sealing layer, a three-layer co-extrusion blow molding film forming technology is adopted, the PE-PA composite film is prepared, and the film product is excellent in comprehensive performance and can be used for manufacturing a BIB bag body.

The invention discloses a crosslinked polyethylene insulated flame-retardant power cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer, an armor layer and an outer sheath layer from inside to outside, and is characterized in that the inner sheath layer or the outer sheath layer is obtained by respectively extruding a sheath material on the outer side of the shielding layer or the armor layer; the sheath material is prepared from the following raw materials: low-density polyethylene, high-density polyethylene, phosphate modified yttrium-graphene nano porous particles, hydroxyapatite porous nanorods, a cross-linking agent, an assistant cross-linking agent, an antioxidant and the like. The obtained power cable has excellent insulativity and flame retardance and has a good application prospect in the field of high-voltage power transmission.

The invention belongs to the technical field of high polymer materials, and particularly discloses a cross-linked antistatic supercritical microcellular foaming material. Comprising the following raw materials in parts by weight: 80-100 parts of HIPS, 10-15 parts of thermoplastic elastomer, 5-10 parts of low-density polyethylene, 10-15 parts of organic multifunctional master batch, 5-10 parts of high-dispersion conductive functional filler, 5-10 parts of modified calcium sulfate whisker, 5-10 parts of grafted modified talcum powder master batch, 1-5 parts of cross-linking agent, 1-5 parts of lubricant and 1-5 parts of antioxidant. The invention provides a cross-linked antistatic supercritical microcellular foaming material as well as a preparation method and application thereof. The cross-linked antistatic HIPS supercritical microcellular foaming material which is excellent in comprehensive performance and can be applied to multiple fields is prepared.

The present invention relates to the technical field of power cable manufacturing, and discloses a low-smoke halogen-free flame-retardant polyolefin sheathed power cable. The power cable outer sheath composite material comprises the following raw materials: metallocene linear low-density polyethylene, ethylene-vinyl acetate copolymer, high-density polyethylene, flame-retardant additives, high-temperature resistant components, antioxidants, cross-linking agents, and lubricants; by improving the flame retardant and high-temperature resistant properties of the polyethylene material, the prepared power cable has excellent mechanical properties, toughness, flame retardant properties, and high-temperature resistant properties, can work continuously and stably in a high-temperature environment, reduce the occurrence of fire accidents, and effectively prevent the spread of fire even in the event of a fire, and does not generate toxic hydrogen halide gas and thick smoke during combustion.

The invention relates to the technical field of polyethylene cables, in particular to a high-strength flame-retardant polyethylene cable and a preparation method thereof.The high-strength flame-retardant polyethylene cable is composed of a copper stranded wire core and a flame-retardant protective layer on the surface of the copper stranded wire core; the flame-retardant protective sleeve is made of a high-strength flame-retardant material; the high-strength flame-retardant material comprises the following components in parts by weight: 80-100 parts of low-density polyethylene, 5-10 parts of a flame retardant, 3-5 parts of a performance additive, 1-1.5 parts of filler, 0.1-0.2 part of a voltage stabilizer, 0.1-0.5 part of an antioxidant, 0.5-1 part of an initiator and 1-5 parts of a lubricant. The amino group on the surface of the silicon dioxide carrier treated by 3-aminopropyltriethoxysilane in the modification additive can be subjected to acid-base interaction with the phosphate group of APP to form chemical bridging; the interface bonding enables the APP and the modification additive to synchronously migrate to the surface of the material during combustion to cooperatively construct a protection layer, so that the problem of protection failure caused by migration rate difference of different flame retardants in a traditional flame-retardant system is solved, and the flame-retardant performance of the cable can be greatly improved.

The invention relates to the technical field of high polymer material processing, and particularly discloses a polyethylene rotational plastic-gradient density-based lightweight hollow product and a method thereof.The polyethylene rotational plastic-gradient density-based lightweight hollow product is prepared from high-density polyethylene, linear low-density polyethylene, nano-silica, carbon nanotubes, a flexibilizer, PE wax and an antioxidant through blending, granulation and grinding; placing the powder in a mold, heating, melting and spinning to form an outer high-density enhancement layer; the preparation method comprises the following steps: blending low-density polyethylene, high-density polyethylene, a microcapsule foaming agent, a compatibilizer and an antioxidant, granulating and grinding; the powder is placed in a mold to continue to be heated and rotated till fusion is completed; cooling to trigger the microcapsule foaming agent to decompose, and reducing the rotating speed until an inner low-density foaming layer is formed on the inner wall of the outer high-density enhancement layer; and performing water-cooling on the outer-layer step, and performing air-cooling on the inner-layer step to obtain a light-weight hollow finished product. The multifunctional requirements for light weight, high strength and heat insulation can be met at the same time, and densification, foaming and gradient curing are completed in a single period.

A submarine cable core comprising a conductor which is surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer in that order; wherein said insulation layer comprises: a low density polyethylene homopolymer or low density polyethylene copolymer with at least one polyunsaturated comonomer and optionally one or more further comonomers; and, a copolymer comprising at least one polar comonomer selected from the group consisting of an alkyl acrylate, an alkyl methacrylate or vinyl acetate, wherein the amount of polar monomer units in the insulation layer is from 1 to 150 micromol per gram based on the total amount of polymer components in the insulation layer.

The invention relates to a cross-linked polyethylene insulation material and a preparation method and application thereof, and the cross-linked polyethylene insulation material comprises the following raw materials: low density polyethylene, an antioxidant, a cross-linking agent, a first scorch retarder and a second scorch retarder, the first anti-scorching agent comprises one or more of an olefin anti-scorching agent, an allyl substituted phenol anti-scorching agent and a thiocarbonate anti-scorching agent, the second anti-scorching agent comprises a free radical terminator, low-density polyethylene, an antioxidant and a cross-linking agent, and the first anti-scorching agent and the second anti-scorching agent are matched for use. The scorching phenomenon of the cross-linked polyethylene insulation material in the processing process and the using process can be reduced, the scorching resistance of the cross-linked polyethylene insulation material is improved, and the service life of the cable is prolonged.

The invention discloses a melt blending preparation process of a semiconductive shielding material for an ultrahigh-pressure crosslinked polyethylene cable, which comprises the following steps: S1, premixing low-density polyethylene and an ethylene-vinyl alcohol copolymer in proportion, the vinyl alcohol chain segment content of the ethylene-vinyl alcohol copolymer being 25%-45%; s2, performing plasma surface treatment on carbon black, and compounding the carbon black with carbon nanotubes to form a conductive filler system; s3, under the protection of inert gas, adding the matrix resin in the step S1 and the conductive filler in the step S2 into a double-screw extruder in stages, and synchronously adding a hindered phenol and phosphite compound antioxidant; and S4, carrying out segmented mixing under the temperature gradient of 160-210 DEG C. Through synergistic compounding of the plasma surface modified carbon black and the carbon nanotubes and in combination with a staged feeding process, directional dispersion of the conductive filler is realized, a three-dimensional interpenetrating conductive network is formed, and the local electric field homogenization capability of the ultrahigh-voltage cable is remarkably improved.

The invention relates to the technical field of crosslinked polyethylene insulated power cables, in particular to a flame-retardant and insulated low-voltage power cable and a preparation method and application thereof. The flame-retardant and insulating low-voltage power cable comprises the inner core layer, the filler layer, the belting layer, the lining layer, the metal armor layer and the outer sheath layer from inside to outside, and the multiple layers can effectively protect the inner core and endow the cable with better performance; in addition, low-density polyethylene, a furan modified polyethylene compatilizer, a reactive flame retardant, bismaleimide, dicumyl peroxide and an auxiliary are adopted to obtain the cross-linked polyethylene material for the cable outer sheath, and the cross-linked polyethylene material has excellent insulation, flame retardance, strength, toughness and repairing performance.

Disclosed in the present invention are a 90°C thermoplastic halogen-free low-smoke flame-retardant polyolefin sheath material and a preparation method therefor. The sheath material is prepared from raw materials comprising the following components in parts by mass: 20-40 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a linear low-density polyethylene, 2-10 parts of a high-density polyethylene, 20-40 parts of a metallocene ethylene-octylene copolymer, 10-15 parts of a maleic-anhydride-grafted metallocene linear low-density polyethylene copolymer, 58-73 parts of aluminum hydroxide, 20-25 parts of modified magnesium hydroxide, 64-84 parts of a synergistic flame retardant, 2-3 parts of a coupling agent, 1-4 parts of a lubricant, 1-3 parts of an antioxidant, and 2-7 parts of a coloring agent, wherein the synergistic flame retardant comprises lithium oxide. A matrix resin has low-temperature performance, mechanical properties and cracking resistance. With regard to flame retardance, a large amount of the synergistic flame retardant, i.e., lithium oxide, is added to a traditional magnesium-aluminum compound flame-retardant system, and therefore an off-white hard shell can be formed during a combustion process while low heat release is ensured, thereby ensuring no dripping during the combustion process.

The invention discloses a compression-resistant and torsion-resistant energy storage cable and a preparation method thereof, and relates to the technical field of energy storage cables. The compression-resistant and torsion-resistant energy storage cable sequentially comprises a cable core, an insulating layer, a lubricating shielding layer and a compression-resistant outer protective layer from inside to outside, wherein the compression-resistant outer protective layer at least comprises the following raw materials in parts by mass: 70-90 parts of high-density polyethylene; 10 to 20 parts of low density polyethylene; 20 to 30 parts of elastic particles; 30 to 40 parts of an ethylene-vinyl acetate copolymer; 30 to 40 parts of a flame retardant; 5 to 10 parts of maleic anhydride grafted poly ethylene propylene diene monomer; 0.1 to 1 part of an antioxidant; 1-2 parts of a lubricant; 0.1 to 1 part of a cross-linking agent; and 0.1-1 part of an assistant cross-linking agent. The anti-compression and anti-torsion energy storage cable prepared by the invention has excellent mechanical performance and electrical performance, and the anti-compression and anti-torsion performance of the energy storage cable is improved.

The invention relates to the technical field of textiles, and discloses functional aramid fiber UD cloth and a preparation method thereof.The functional aramid fiber UD cloth is formed by taking modified aramid fiber as a base material, gluing the modified aramid fiber with epoxy resin glue, overlapping the modified aramid fiber with a low-density polyethylene film and then curing the modified aramid fiber and the low-density polyethylene film, and the modified aramid fiber is aramid fiber with the surface modified with a macromolecular modifier. The macromolecular modifier structure contains a large number of ether bonds and hydroxyl groups, the ether bonds can generate hydrogen-bond interaction with epoxy resin molecular chains, and the hydroxyl groups can participate in the curing process of epoxy resin glue in the subsequent hot pressing process; the branched structure of the macromolecular modifier can form a hydrogen bond connection site at the interface of the aramid fiber and the glue, and a hydrogen bond connective network is formed, so that the affinity of the aramid fiber and the epoxy resin glue is greatly improved, and the phenomena of layer warping, swelling and the like of the subsequently prepared UD cloth can be avoided.

A germ-repellent plastic contains an anti-biofouling compound, and a basic plastic. The anti-biofouling compound is optionally selected from the group of a polyol, a polyether polyol, a polyol derivative, and a combination thereof; or the anti-biofouling compound is selected from the group consisting of a polyether, a poly (ethylene glycol) ether, a polysorbate, and a combination thereof; or the anti-biofouling compound is selected from the group consisting of poly (ethylene glycol) sorbitan monolaurate, poly (ethylene glycol) sorbitan monooleate, poly (ethylene glycol) sorbitol hexaoleate, ceteareth, and a combination thereof. The basic plastic is not a blend of a low-density polyethylene polymer and an ethyl vinyl acetate copolymer, a blend of a polypropylene polymer and an ethyl vinyl acetate copolymer, a blend of polyolefin elastomer polymers and a polyvinyl chloride polymer. A method for manufacturing such a germ-repellent plastic and a germ-repellent plastic item are also described.

The invention discloses a cable insulating material which comprises the following components in parts by weight: 40-60 parts of low-density polyethylene, 20-30 parts of an ethylene-vinyl acetate copolymer EVA, 2-5 parts of a composite anti-aging agent, 5-10 parts of a core-shell structure nano composite modifier, 1-2 parts of a lubricant, 3-8 parts of a compatilizer, 20-30 parts of a composite flame retardant, 5-10 parts of a nano reinforcing agent and 2-4 parts of phenylsilane. The core-shell structure modifier strengthens interface bonding, and cooperates with the modified nano reinforcing agent to disperse stress, so that the mechanics and high and low temperature resistance are improved; the composite anti-aging agent inhibits multi-path aging and improves the aging resistance. The material has the advantages of excellent mechanical properties, high and low temperature resistance and outstanding aging resistance, and meets the insulation quality and efficiency requirements of cables in complex use environments.

The invention provides a crosslinked polyethylene insulating material with intrinsic self-repairing and recoverable characteristics as well as a preparation method and application thereof, and relates to the technical field of cable materials. The crosslinked polyethylene insulating material with intrinsic self-repairing and recoverable characteristics is prepared from the following components in parts by weight: 99.7 parts by weight of low-density polyethylene, 1.0 to 2.6 parts by weight of peroxide, 0.1 to 0.5 part by weight of an antioxidant, 5 to 20 parts by weight of a maleimide monomer, 0.35 to 0.7 part by weight of a catalyst, 0.5 to 3.0 parts by weight of a ligand and 0.5 to 3.0 parts by weight of furyl micromolecules. The low-density polyethylene is subjected to functional modification through catalytic amination reaction, chain interruption and crosslinking in the modification process are avoided, and the mechanical property, the insulating property and the dielectric property of the crosslinked polyethylene are enhanced through peroxide introduced through post-absorption. Meanwhile, the dynamic reversible Diels-Alder reaction introduced by the furyl small molecules is absorbed, so that the polyethylene insulating material has a good intrinsic self-repairing effect on mechanical damage and electric damage.

The invention relates to the field of cables, and discloses a fire-resistant light cable for a safety harbor-returning system for a ship and a processing method thereof.The cable comprises a guide core, a fire-resistant layer, an insulating layer, a cabling layer, an inner sheath layer, an armor layer and an outer sheath layer which are sequentially arranged from inside to outside, and the inner sheath layer and the outer sheath layer are prepared by extruding sheath layer materials; the sheath layer is made of low-density polyethylene, nitrile rubber, ethylene-tetrafluoroethylene copolymer, functional additives, composite filler and auxiliaries; the functional additive is prepared by the following steps: reacting 3, 5-di-tert-butyl-4-hydroxybenzoyl chloride with 2-chloro-4, 6-diamino-1, 3, 5-triazine to obtain a modified hindered phenol component, and then reacting 1, 4-p-xylylene dichloride with 10-(2, 5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide to obtain a product, and continuously reacting the product with the modified hindered phenol component; the composite filler is prepared by modifying vermiculite with titanium dioxide and zinc oxide pillared. The cable prepared by the invention has excellent mechanical properties, flame retardance and aging resistance.