4777 results about "Polyolefin" patented technology

The invention belongs to the technical field of gel materials, and particularly relates to aerogel powder for polyolefin modification and a preparation method and application thereof. The preparation method of the aerogel powder comprises the following steps: (1) preparing aramid nanofiber dispersion liquid; (2) preparing a polypyrrole coated aramid nanofiber dispersion liquid; (3) mixing polyamide acid and the polypyrrole coated aramid nanofiber dispersion liquid, and then carrying out partial imidization and solvent exchange to prepare hydrogel; and (4) carrying out freeze drying, thermal imidization and crushing to obtain the aerogel powder for polyolefin modification. The aerogel powder is a porous solid material formed by forming one-dimensional composite fibers from aramid nanofibers and polypyrrole and combining the one-dimensional composite fibers with polyimide resin. The aerogel powder and polyolefin resin are compounded to obtain the polyolefin resin composite material with high strength and antistatic property, and the polyolefin resin composite material can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention belongs to the technical field of fiber materials, and particularly relates to a modified aramid nanofiber as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing an aramid nanofiber dispersion liquid; (2) modifying the aramid nanofiber by using POSS; and (3) carrying out in-situ polymerization on polypyrrole on the surface of the aramid nanofiber. POSS (polyhedral oligomeric silsesquioxane) has a relatively large volume exclusion effect, the template effect of long-chain alkyl quaternary ammonium salt can be influenced by scattered adhesion of POSS on the surface of aramid nanofiber, uneven polymerization of pyrrole monomers is caused, and formation of a rough structure on the surface of the fiber is facilitated. According to the invention, the polypyrrole-coated aramid nanofiber with a coarse structure is used as a polyolefin modified material, so that the problem of low interfacial force existing in a common filler is solved, and the polyolefin resin composite material with high strength and antistatic property is obtained and can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention provides a solid electrolyte slurry, an electrode slurry, a solid electrolyte sheet, an electrode sheet, a solid battery monomer, a battery device and a power utilization device.The solid electrolyte slurry comprises a sulfide solid electrolyte material, a solvent and a binder dissolved in the solvent, and the solvent is a non-polar solvent, a weak-polar solvent or a mixed solvent of the non-polar solvent and the weak-polar solvent; the binding agent comprises a polyacrylate binding agent and a non-polar polyolefin binding agent. The slurry disclosed by the invention has high dispersity, high suspension property and good cohesiveness, and can enable the solid-state battery monomer to have high initial coulombic efficiency when being used in the solid-state battery monomer.

In some embodiments, a cable can include an electrically conductive inner core. A first insulation layer can be disposed about the inner core. An electrically conductive layer can be disposed about the first insulation layer. A second insulation layer can be disposed about the electrically conductive layer. A first polymer jacket can be disposed about the second insulation layer. The first polymer jacket can include a first layer of armor strength members disposed therein. A second polymer jacket can be disposed about the first polymer jacket. The second polymer jacket can include a second layer of armor strength members disposed therein. An outer polymer jacket can be disposed about the second polymer jacket. At least one of the first polymer jacket, the second polymer jacket, and the outer polymer jacket can be formed from an aliphatic polyketone polymer, an ethylene-propylene copolymer, a polyolefin elastomer, a polypropylene, or a cross-linkable polyethylene.

The invention relates to a polyethylene and silica gel mixed material, a preparation method thereof and application of the polyethylene and silica gel mixed material in a composite optical cable silicon core tube. The composite material comprises the following components in parts by weight: high-density polyethylene, an ethylene-siloxane copolymer elastomer, a maleic anhydride grafted polyolefin elastomer, hydroxylated nano silicon dioxide, liquid paraffin, a crystallization nucleating agent, an ultraviolet light absorber, an auxiliary stabilizer, a processing aid and color master batch. The liquid paraffin is formed by blending dual-molecular-weight paraffin with different carbon chain lengths, and part of the liquid paraffin is grafted and modified by polybutylene so as to enhance the anchoring capacity of the lubricating phase; in addition, nano cellulose crystals grafted by a PEG-PCL (Polyethylene Glycol-Polycaprolactone) block copolymer are introduced, so that the dimensional stability and the interface structure integrity of the material are synergistically enhanced. The composite material has excellent low friction, thermal oxidation stability, creep resistance and ultraviolet aging resistance, and is suitable for preparation of a high-performance composite optical cable silicon core tube.

The invention relates to the technical field of cables, and particularly discloses a high-performance halogen-free flame-retardant flexible power cable. The high-performance halogen-free flame-retardant flexible power cable comprises a core layer, an insulating layer, a flame-retardant layer, a shielding layer and a protective layer which are arranged in sequence, the flame-retardant layer is prepared from the following raw material components in parts by weight: 30 to 40 parts of ethylene-vinyl acetate copolymer, 10 to 20 parts of polyolefin elastomer, 8 to 10 parts of microencapsulated ammonium polyphosphate, 2.5 to 4.5 parts of pentaerythritol, 20 to 30 parts of inorganic flame retardant, 5 to 8 parts of expansible graphite, 2 to 3 parts of diatomite, 0.5 to 1.5 parts of nano kaolin, 2 to 3 parts of zinc borate, 0.1 to 0.5 part of antioxidant and 0.5 to 1.0 part of lubricant. The cable provided by the invention not only has good flame retardant property, but also has certain flexibility.

The invention relates to the technical field of high polymer materials, in particular to high-strength and high-toughness modified plastic particles as well as a preparation method and application thereof. The preparation method of the high-strength and high-toughness modified plastic particles comprises the following steps: carrying out a reaction on MMT / CNTs and diisocyanate to prepare isocyanate-based MMT / CNTs; the preparation method comprises the following steps: reacting isocyanate-based MMT / CNTs with glycerol 1, 3-diglycerol alkyd diacrylate to prepare MMT / CNTs containing alkenyl groups; the preparation method comprises the following steps: carrying out grafting reaction on maleic anhydride, alkenyl-containing MMT / CNTs and POE (Polyolefin Elastomer) to prepare a modifier; and carrying out melt blending, extrusion, cooling and pelletizing on the modifier, the auxiliary agent and PA6 to obtain the high-strength and high-toughness modified plastic particles. The nano filler MMT / CNTs and the polyolefin elastomer POE are introduced, so that the modified plastic particles taking the PA6 as the matrix have high strength and high toughness.

The invention provides a high-temperature-resistant corrosion-resistant cable material for a control line and a preparation method of the high-temperature-resistant corrosion-resistant cable material, and belongs to the field of metallocene polyolefin materials. The cable material is prepared from the following chemical raw materials: 45 to 65 parts of maleic anhydride grafted metallocene polyolefin, 5 to 10 parts of maleic anhydride grafted polyolefin elastomer, 3 to 6 parts of epoxy group modified polyhedral oligomeric silsesquioxane, 2 to 5 parts of polyether amine, 5 to 10 parts of ion response type core-shell structure sustained release microspheres, 8 to 15 parts of multi-dimensional reinforcement, 15 to 25 parts of halogen-free flame retardant, 0.5 to 1.5 parts of antioxidant and 0.5 to 1.5 parts of processing aid. The chemical raw materials with specific functions are accurately selected, a synergistic effect system is constructed, and meanwhile, the high temperature resistance and corrosion resistance of the cable material for the control line are improved.

The invention discloses a polyolefin intelligent performance prediction and reverse design system and method. The system comprises a data acquisition and management module used for acquiring and managing polyolefin production process data, product first characteristic data and product second characteristic data; the intelligent performance prediction module comprises a mechanism model module and a data driving model module; the mechanism model module is used for predicting first characteristic data of the product according to the polyolefin production process data; the data driving model module is used for predicting second characteristic data of the product according to the first characteristic data of the product; the reverse design optimization module is used for generating initial polyolefin production process data by utilizing an intelligent optimization algorithm according to a product first characteristic data target value and / or a product second characteristic data target value input by a user and performing iterative optimization in combination with the intelligent performance prediction module; and outputting the optimized polyolefin production process data meeting the target value.

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The invention relates to the technical field of cable materials, in particular to a flame-retardant efficient cross-linked polyolefin cable body and a preparation method thereof. The cable body comprises a polyolefin matrix, 2, 4-dihydroxy-6-methyl benzamide, an intumescent flame retardant, dicumyl peroxide, an antioxidant, a light stabilizer and a lubricant, wherein the polyolefin matrix is subjected to synergistic modification by phosphorus-nitrogen heterocyclic silane-plasma. The preparation method of the polyolefin matrix synergistically modified by phosphorus-nitrogen heterocyclic silane-plasma comprises the following steps: performing grafting reaction on polyolefin resin and phosphorus-nitrogen heterocyclic silane under the action of an initiator, and performing plasma surface treatment to endow the material with dual active sites. The preparation method comprises the following steps: melting and granulating a polyolefin matrix subjected to phosphorus-nitrogen heterocyclic silane-plasma synergistic modification, small organic molecules and auxiliaries, and performing extrusion molding under a crosslinking condition to obtain a cable body. The material disclosed by the invention has comprehensive advantages in flame-retardant efficiency, crosslinking degree and mechanical property, and is suitable for manufacturing high-safety power cables.

The invention discloses a high-elasticity regenerated polyester material for chemical fibers and a preparation method thereof, and relates to the technical field of high polymer material regeneration. The invention discloses a high-elasticity regenerated polyester material for chemical fibers. The composite material is prepared from the following raw materials in parts by weight: 8 to 12 parts of glass fiber, 0.2 to 0.4 part of silane coupling agent KH-550, 4 to 6 parts of absolute ethyl alcohol, 4 to 6 parts of aluminum hypophosphite, 2 to 4 parts of melamine cyanurate, 0.05 to 0.15 part of aryl sodium phosphate, 65 to 75 parts of modified regenerated polyester, 20 to 30 parts of modified bio-based elastomer, 5 to 10 parts of maleic anhydride grafted polyolefin elastomer, 0.3 to 0.8 part of antioxidant and 1 to 2 parts of carbon black master batch. 0.1 to 0.3 part of a silicone lubricant; and 5 to 10 parts of didodecyl dimethyl ammonium chloride. Through supercritical chain extension, nano grafting and gradient crystallization technologies, the mechanical property and elasticity of the regenerated polyester are improved. The modified bio-based elastomer, the flame retardant and the antistatic agent have a synergistic effect, so that the material has high elasticity, flame retardance and antistatic functions. The method is suitable for high-end application in the field of chemical fibers, realizes high-value recycling of waste polyester, and has remarkable environmental protection benefits.

The invention relates to the technical field of polyolefin cable materials, in particular to a photovoltaic weather-resistant anti-cracking low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof.The photovoltaic weather-resistant anti-cracking low-smoke halogen-free flame-retardant polyolefin cable material is prepared from, by weight, 90-150 parts of polyolefin resin, 1-3 parts of antioxidant, 2-5 parts of ultraviolet light absorber, 30-70 parts of composite flame retardant, 10-25 parts of carbon black and 3-5 parts of cross-linking agent; the composite flame retardant comprises a core material, a first shell material and a second shell material, the core material comprises a halloysite nanotube adsorbed with a flame retardant, the first shell material comprises epoxy resin, and the second shell material comprises maleic anhydride grafted polyethylene. According to the polyolefin cable material provided by the invention, the purpose of efficient flame retardance can be achieved by adding the halloysite nanotubes and the flame retardant system, the interfacial compatibility between the flame retardant and the matrix resin can be improved by adding the maleic anhydride grafted polyethylene, and the flame retardance of the polyolefin cable material can be improved by combining the added halloysite nanotubes and epoxy resin. The purpose of improving weather resistance, stress resistance and crack resistance of matrix resin is achieved.

The invention relates to the technical field of polypropylene compositions and modified polymer materials thereof, and discloses a high-performance polypropylene-based green energy-saving cable insulation layer composition which comprises an isotactic polypropylene matrix, a maleic anhydride grafted polyolefin elastomer distributed in a dispersed phase and an amide nucleating agent distributed on a non-polar phase interface, an anchoring structure is constructed on a phase interface through hydrogen bond interaction, a matrix molecular chain is induced to grow to form a radial needle-shaped crystal cluster penetrating through the phase interface, and a three-dimensional interpenetrating crystal bridging network is constructed. Through the crystal bridging network, interface deep traps are converted into continuous shallow trap diversion channels, charges are guided to migrate orderly, space charge accumulation is inhibited, and the three-dimensional interpenetrating crystal bridging network is constructed. And the steric effect generated by the interface anchoring structure cooperatively restrains the thermal expansion of the dispersed phase, so that the high-temperature dimensional stability and dielectric property of the material are improved.

The invention is suitable for the technical field of material science and electrochemical energy, and provides a lyophilic polyolefin master batch and a preparation method and application thereof.The lyophilic polyolefin master batch is prepared from polyolefin, modified polyolefin, a cross-linking agent and a compatilizer, the modified polyolefin comprises polyolefin grafted with polar functional groups, and the cross-linking agent comprises a cross-linking agent and a compatilizer; the polar functional group can be selected from one or more of carboxyl, hydroxyl, amido, epoxy group, anhydride group, sulfonic acid group, cyano group and ether group, and the technical problem of poor lyophilic property of the polyolefin diaphragm is creatively solved by scientifically proportioning and compounding the modified polyolefin with the polar functional group, the common polyolefin, the cross-linking agent and the compatilizer. The components in the material system have a synergistic effect: the modified polyolefin provides lyophilic property, the cross-linking agent prevents the product from being degraded, the compatilizer improves the compatibility of the components and improves the polarity, and the comprehensive improvement of the performance of the diaphragm is realized through the combined effect.

The invention relates to the technical field of high polymer materials, and discloses a conductive shielding material for a high-voltage cable. Comprising the following components in parts by weight: 40 to 70 parts of main body polyolefin resin, 10 to 30 parts of ethylene-vinyl acetate copolymer, 5 to 15 parts of maleic anhydride grafted polyolefin, 20 to 40 parts of surface modified conductive carbon black, 0.5 to 2 parts of peroxide cross-linking agent, 0.5 to 3 parts of functionalized silane coupling agent, 0.1 to 1 part of processing aid and 0.1 to 1 part of antioxidant, the surface modified conductive carbon black is high-structure conductive carbon black which is subjected to plasma oxidation treatment, solution graft polymerization and surface coupling agent pretreatment. The conductive carbon black is subjected to multi-step surface modification including plasma oxidation, solution graft polymerization and surface coupling agent pretreatment, and the in-situ chemical bonding effect of maleic anhydride grafted polyolefin is matched, so that the agglomeration problem of the conductive carbon black caused by high surface energy is effectively solved.

The invention discloses a high-toughness polypropylene staple fiber and a preparation method thereof, and relates to the technical field of functional polypropylene fibers. The high-toughness polypropylene short fiber is prepared from the following components in parts by mass: 70 to 85 parts of polypropylene resin, 10 to 20 parts of a polyolefin elastomer, 3 to 8 parts of maleic anhydride grafted polypropylene, 2 to 4 parts of a plasticizer, 1 to 3 parts of an antioxidant and 0.5 to 2 parts of a nucleating agent. By introducing the novel plasticizer with a specific structure, the entanglement resistance among polypropylene molecular chains is effectively reduced, and the molecular chains are easier to relatively slide when being stressed, so that fracture caused by stress concentration is avoided, and the stretching resistance and bending resistance of the fiber are remarkably improved.

The invention belongs to the technical field of waterproof and drainage boards, and provides a waterproof and drainage board with high compressive strength and tensile strength and a preparation method and application thereof.The waterproof and drainage board is formed by compounding an upper layer, a middle layer and a lower layer, and the upper layer and the lower layer are each prepared from 30-40 parts of high-density polyethylene, 10-20 parts of chlorinated polypropylene, 10-15 parts of metallocene polyethylene and 1-3 parts of carbon nanotubes; 2-5 parts of nano calcium carbonate, 1-5 parts of polyethylene wax, 1-3 parts of an antioxidant and 1-3 parts of an anti-ultraviolet agent; the middle layer is prepared from the following raw materials: 35 to 55 parts of linear low-density polyethylene, 15 to 30 parts of metallocene polyethylene, 10 to 15 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of POE (Polyolefin Elastomer), 5 to 10 parts of aramid chopped fiber, 1 to 3 parts of antioxidant and 1 to 3 parts of ultraviolet screening agent; the nano calcium carbonate is subjected to modification treatment. The waterproof and drainage board has relatively high compressive strength and tensile strength, and has a good application prospect.

The invention discloses an antistatic agent for polyolefin film material production and a preparation method thereof. According to the invention, through reasonable molecular structure design, raw material selection and synthesis process optimization, the antistatic agent has multiple functions of high-efficiency antistatic property, oxidation resistance, antibacterial property, mechanical property enhancement and the like. The polyolefin material added with the multifunctional antistatic agent has good antistatic performance under different environmental conditions, and the oxidation resistance, the antibacterial property and the mechanical property are also remarkably improved. The antistatic agent has good adaptability with processing of a polyolefin film material and has wide application prospects and market competitive advantages, and the comprehensive performance of the polyolefin film material is remarkably improved through multi-component collaborative design. The composite system of the polyolefin quaternary ammonium salt and the graphene quantum dots strengthens the long-term effect of the antistatic effect, and meanwhile, the synergistic effect of the hindered phenol and the phosphite strengthens the antioxidant stability of the material in the processing and using processes.

The invention discloses a method for preparing a high-strength diaphragm by using a polyolefin elastomer, and relates to the technical field of battery diaphragm materials, the method comprises the following steps: (1) mixing polypropylene with the polyolefin elastomer to obtain an outer layer material; (2) mixing polyethylene with a polyolefin elastomer to obtain an inner layer material; (3) respectively melting and plasticizing the outer layer material and the inner layer material, and then carrying out three-layer co-extrusion, traction and cooling to obtain a casting piece; and (4) carrying out annealing treatment, stretching and heat setting on the cast sheet to obtain the diaphragm. By adding the polyolefin elastomer, the transverse tensile strength of the dry-method diaphragm is improved, and the problem that the dry-method diaphragm is easy to tear is effectively solved; and the hole closing temperature of the diaphragm is reduced, rapid temperature rise after the battery is abnormal can be effectively blocked, the diaphragm breaking temperature of the diaphragm can be increased to a certain degree, and the safety of the battery is greatly improved.

The invention provides a preparation method of a functionalized polyolefin elastomer. The preparation method comprises the following steps: carrying out polymerization reaction on ethylene and alpha-olefin in the presence of a copolymerization catalyst and a cocatalyst, and adding a silane coupling agent and an initiator at an outlet of a reactor to obtain a reaction material; devolatilizing the reaction material, adding a quenching agent, and terminating the reaction; and introducing the material into a screw extruder, and granulating to obtain the functionalized polyolefin elastomer. According to the preparation method, polar functional groups are introduced in the production process of the polyolefin elastomer, the obtained functionalized polyolefin elastomer product can accelerate the absorption rate of POE particle photovoltaic adhesive film auxiliaries, and the problem of auxiliary migration of EPE adhesive films is remarkably solved.

The invention discloses an antibacterial modified full-dull polyester fiber and a preparation method thereof, belongs to the technical field of polyester fiber processing, and is used for solving the technical problem that the mechanical property and the antibacterial property of the full-dull polyester fiber in the prior art need to be further improved. The composite material specifically comprises the following components in parts by weight: 50-60 parts of polyethylene glycol terephthalate, 40-50 parts of activated modified polyester, 25-35 parts of epoxy modified polyolefin, 5-7 parts of PEG modified titanium and 2-3 parts of an auxiliary additive. According to the full-dull polyester fiber disclosed by the invention, zinc modified nano titanium is modified by polyethylene glycol, and then polyethylene glycol terephthalate is enhanced by the modified zinc modified nano titanium, cross-linked and bonded activated modified polyester with reaction activity and epoxy modified polyolefin, so that the mechanical strength and the ultraviolet aging resistance of the full-dull polyester fiber are effectively improved; the antibacterial property and the washing resistance of the full-dull polyester fiber are also improved.

The invention relates to the technical field of wire and cable materials, and discloses a high-temperature-resistant and aging-resistant wire and cable material and a preparation method thereof.The high-temperature-resistant and aging-resistant wire and cable material is prepared from, by weight, modified polyetherimide, silane modified polyolefin, organic montmorillonite, surface modified nanometer aluminum oxide and surface functionalized graphene, an antioxidant, a silane coupling agent and a processing lubricant; the preparation method of the high-temperature-resistant and aging-resistant wire and cable material comprises the following steps: weighing and preparing raw materials; carrying out surface modification treatment on the nanofiller; drying the raw materials; premixing the components; reacting, extruding and granulating; and cooling, bracing and dicing. By adopting the technical scheme of synergistic application of the surface functionalized graphene and the silane modified polyolefin, the technical effect of remarkably improving the thermal stability and the mechanical property of the composite material is achieved, the problem that the performance of a traditional scheme is unstable at high temperature is solved, and the phenomena of filler agglomeration and material degradation are avoided.

The invention belongs to the technical field of high polymer materials, and particularly relates to special resin for a polyethylene film as well as a preparation method and application thereof. The special resin for the polyethylene film is prepared from the following components in parts by weight: 50 to 70 parts of HDPE (High-Density Polyethylene) resin, 20 to 30 parts of LLDPE (Linear Low Density Polyethylene) resin, 0.5 to 3 parts of nano zinc oxide, 5 to 10 parts of maleic anhydride grafted POE (Polyolefin Elastomer) and 0.1 to 0.5 part of antioxidant. The HDPE, the LLDPE and the grafted POE form a three-phase topological structure, so that the bending modulus and the notch toughness can be synchronously improved. The special resin for the polyethylene film, which is prepared by adopting a low-temperature second-order blending process, can keep the toughening effect of an elastomer. The special resin for the polyethylene film prepared by the invention can realize ultrahigh toughness while keeping high rigidity, has long-acting weather resistance, can meet the requirements of packaging films and other high-end fields, is high in processing adaptability, and is suitable for a high-speed film blowing production line.

The invention discloses a silane-crosslinked low-smoke halogen-free flame-retardant oil-resistant polyolefin cable material and a preparation method thereof. The method comprises the following steps: preparing a bio-based polyesteramide toughening phase which is pre-polymerized by castor oil-based polyamide and poly (butylene adipate-co-terephthalate) and is terminated by itaconic anhydride; the preparation method comprises the following steps: self-assembling phytic acid and melamine to wrap ammonium polyphosphate, so as to prepare supramolecular flame-retardant gel powder; the method comprises the following steps: grafting aramid pulp fibers by using a phosphorus-containing silane coupling agent to prepare a reactive liquid crystal reinforced phase; the preparation method comprises the following steps: blending and banburying the components with a hydrogenated styrene-isoprene-styrene block copolymer, an antioxidant and a peroxide cross-linking agent, carrying out dynamic vulcanization and interface bonding, and carrying out extrusion and electron beam irradiation to finally crosslink. An interpenetrating-topology network structure is formed in the prepared cable material, the crosslinking degree is larger than or equal to 82%, and the cable material is rapid in crosslinking, excellent in oil resistance, low in smoke and free of toxicity and is particularly suitable for super high-rise building hanging cables, deep sea exploration cables and new energy automobile liquid cooling cables.

The invention relates to the technical field of composite films, and particularly discloses a low-temperature heat-sealable high-strength BOPP composite film and a preparation process thereof.The BOPP composite film is prepared by adopting three-layer co-extrusion and two-way stretching processes, and the balance between high strength and low-temperature heat sealability is achieved. The composite film comprises an anti-adhesion surface layer, a core layer and a low-temperature heat-sealing layer; the anti-adhesion surface layer is prepared from the following raw materials: homo-polypropylene, a composite anti-adhesion agent, a slipping agent and PP-g-MAH; the composite anti-adhesion agent is prepared from modified silicon dioxide and modified diatomite in a mass ratio of 3 to 1; the raw materials of the core layer comprise homo-polypropylene, an antistatic agent and a coupling agent, and the raw materials of the low-temperature heat sealing layer comprise an ethylene-vinyl acetate copolymer, PP-g-MAH, a polyolefin elastomer, POE-g-MAH, a modified nucleating agent and an antioxidant, so that the balance of high strength and low-temperature heat sealability is realized, interlayer performance complementation is realized, the mechanical strength is improved, the heat sealing temperature is reduced, and the service life is prolonged. The overall peel strength is improved, and no layering phenomenon exists during stretching.

The invention relates to the technical field of semiconductor wafer processing, and particularly discloses an adhesive tape for semiconductor wafer thinning and a preparation process thereof. The adhesive tape for semiconductor wafer thinning comprises a base material layer and a bonding layer arranged on the surface of the base material layer, the base material layer is made of polyolefin, and the bonding layer is a modified acrylic acid adhesive layer; the modified acrylic acid adhesive layer is prepared from the following raw materials in parts by weight: 60 to 70 parts of 2-ethylhexyl acrylate, 15 to 25 parts of butyl acrylate, 5 to 10 parts of methyl methacrylate, 2 to 5 parts of hydroxyethyl acrylate, 0.5 to 2 parts of glycidyl methacrylate, 1 to 3 parts of a modifier, 0.8 to 1.2 parts of an isocyanate cross-linking agent, 0.3 to 0.8 part of an epoxy cross-linking agent and 0.3 to 0.8 part of azodiisobutyronitrile. According to the adhesive tape for semiconductor wafer thinning, the fixing and protecting effects on the wafer are improved.

The invention discloses a modified acrylate emulsion adhesive as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The modified acrylate emulsion adhesive is prepared by adopting a semi-continuous emulsion polymerization method. The water-based adhesive is prepared from the following raw materials in parts by weight: 5-20 parts of water-based polyolefin, 50-200 parts of deionized water, 0.5-4 parts of an emulsifier, 20-50 parts of an acrylate monomer, 1-10 parts of an acrylic monomer, 0.2-1.5 parts of an initiator, 0-50 parts of styrene, 0.1-2 parts of a cross-linking agent and 0.5-15 parts of a neutralizer. The modified acrylate emulsion adhesive is obtained by taking the water-based polyolefin as a core structure of the emulsion and taking the acrylate polymer as a shell structure of the emulsion, and the adhesive has good compatibility with a polyolefin diaphragm and an electrolyte, so that the synergism of a lithium ion battery negative electrode, the electrolyte and the diaphragm is promoted; further, the electrochemical performance of the lithium ion battery is improved.

The invention provides a high-toughness plastic packaging film material and a preparation method thereof, and belongs to the field of metallocene polyolefin plastics. The high-toughness plastic packaging film material is prepared from the following chemical raw materials: 80 to 90 parts of metallocene polyethylene resin, 5 to 8 parts of supramolecular cross-linking agent, 6 to 10 parts of core-shell type modifier, 3 to 5 parts of ethylene-vinyl acetate copolymer, 2 to 4 parts of stearic acid modified nano calcium carbonate, 2 to 3 parts of polyolefin elastomer, 0.2 to 0.5 part of di (3, 4-dimethyldibenzylidene) sorbitol, 2 to 5 parts of thermotropic liquid crystal polymer and 0.4 to 0.7 part of antioxidant. 0.8 to 1.2 parts of a lubricant and 0.5 to 1.0 part of an antistatic agent. Through the compatibility design of a toughening mechanism, the synergistic balance of an enhancing mechanism and the optimization of transparency guarantee, the functions of all the components in a metallocene polyethylene resin matrix are complemented, and the ultrahigh toughness, high strength and high transparency of the film material are achieved.

An extreme-cold resistant low-fume halogen-free flame-retardant polyolefin sheath, a preparation method therefor, and a cable. The sheath comprises the following raw materials in parts by mass: 4-16 parts of an ethylene-vinyl acetate copolymer, 7-13 parts of a phosphate group functionalized linear low-density polyethylene, 9-15 parts of an ethylene-octene copolymer, 5-10 parts of a maleic anhydride-grafted ethylene-methyl methacrylate copolymer, 10-15 parts of magnesium hydroxide, 40-50 parts of aluminum hydroxide, etc. The preparation method for the phosphate group functionalized linear low-density polyethylene comprises: adding a catalyst to a pre-cooled ethylene monomer, adding a vinyl phosphate ester and an initiator after the reaction, and reacting for 1-2 hours at a temperature of 65-75°C and a pressure of 15-35 Mpa and then terminating the reaction, thereby obtaining the phosphate group functionalized linear low-density polyethylene. Compared with unfunctionalized polyethylene, the phosphate group functionalized polyethylene used has greatly improved low-temperature and flame-retardant performance, and can improve the overall flame-retardant and low-temperature performance of the formula.