1181 results about "High-density polyethylene" patented technology

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 provides a floating type annular wave-resistant offshore photovoltaic structure. The floating type annular wave-resistant offshore photovoltaic structure comprises arc-shaped wave-resistant structure units, spring connectors, photovoltaic buoyancy tanks, photovoltaic modules, buoyancy tank mooring cables, mooring cables and pile anchors. The plurality of arc-shaped anti-wave structure units are flexibly and annularly connected through the spring connectors to form a floating type annular anti-wave structure; photovoltaic buoyancy tanks are fully paved in the circular ring of the floating type annular wave-resistant structure in parallel, and a photovoltaic module is fixedly mounted on the surface of each photovoltaic buoyancy tank. The structure main body of the novel floating type annular wave-resistant offshore photovoltaic structure adopts arc-shaped wave-resistant structures made of a high-density polyethylene material, the arc-shaped wave-resistant structures are connected into an integral circular ring through spring connectors, photovoltaic modules in the ring are protected and moored, a plurality of macromolecule buoyancy tank mooring cables are adopted in the ring to be connected with photovoltaic buoyancy tanks, and the photovoltaic buoyancy tanks are connected into a whole. The whole structure has certain flexibility and has the advantages of being small in steel consumption, high in weather resistance, low in building cost, high in wind wave resistance, easy and convenient to construct, good in power generation economical efficiency and the like.

The invention discloses a high-strength modified high-density polyethylene double-wall corrugated pipe and a preparation method thereof, and relates to the technical field of high-density polyethylene double-wall corrugated pipes. The high-strength modified high-density polyethylene double-wall corrugated pipe is prepared from the following components: high-density polyethylene, ultra-high molecular weight polyethylene, reinforcing filler, a compatilizer, an antioxidant and a lubricant. The preparation method comprises the following steps: reinforcing filler surface modification; all the components are subjected to melt blending to prepare the modified composite material; the modified composite material is subjected to extrusion molding to form the double-wall corrugated pipe; and cooling, shaping and cutting. The UHMWPE and the reinforcing filler are introduced, and the compatilizer is combined to improve interface bonding, so that macromolecular chains of the UHMWPE are entangled to form a tough network, the reinforcing filler provides rigid support, and the high-temperature modulus and creep resistance are synergistically improved; high-temperature oxidative degradation is effectively inhibited through the antioxidant, the slow crack growth resistance time is prolonged, and the service life is prolonged.

The invention discloses a high-weatherability sound insulation wood plastic wallboard and a preparation method thereof, the high-weatherability sound insulation wood plastic wallboard comprises the following raw materials by weight: 30-40 parts of wood flour or plant fiber, 25-35 parts of a sound insulation functional filler, 35-45 parts of high density polyethylene, 2-2.5 parts of maleic anhydride grafted high density polyethylene, 1-1.5 parts of stearic acid, 3-4.5 parts of a weatherability auxiliary agent, and 1-1.5 parts of azodicarbonamide. The problems of cracking, deformation and the like caused by moisture absorption expansion are relieved by optimizing the proportion and compatibility of the wood flour and the plastic, and then the problems of weather resistance and sound insulation of the wallboard outdoors are solved by filling the porous sound absorption material.

The invention belongs to the technical field of 3PE corrosion prevention, and particularly relates to a high-temperature-resistant and cathodic disbonding-resistant 3PE corrosion-resistant pipeline and a preparation method thereof. A pipeline epoxy bottom layer, a middle adhesive layer and a polyethylene surface layer are subjected to systematic chemical synergistic modification, specifically, the epoxy bottom layer is modified with phenolic resin and amino silane, and a heat-resistant compact barrier is formed; the middle layer reacts with maleic anhydride grafted polyethylene through amino silane to construct a chemical bridge for simultaneously connecting the upper layer and the lower layer; the surface layer is grafted with high-density polyethylene through fluoroprimary amine modified glycidyl methacrylate, and a hydrophobic and oleophobic chain and a reactive functional group are introduced; according to the structure, through the synergistic effect of the high-temperature stability of the bottom layer, the two-way chemical bridging capacity of the middle layer and the inert hydrophobic characteristic of the surface layer, the long-term use temperature upper limit, the stripping resistance and the medium infiltration resistance of the pipeline are improved, and a solution is provided for long-term protection of the pipeline in the severe environment.

The invention discloses a high-density polyethylene silicon core pipe and a preparation method thereof, and relates to the technical field of silicon core pipes. The high-density polyethylene is subjected to modification treatment in different modes to obtain different modified high-density polyethylene; different modified high-density polyethylene is used as a main component, and a silicon core pipe outer-layer mixture and a silicon core pipe inner-layer mixture are prepared respectively; finally, the silicon core pipe outer layer mixture and the silicon core pipe inner layer mixture are subjected to melt co-extrusion, Si-O-C chemical bonding is generated on the inner layer and the outer layer, and the high-density polyethylene silicon core pipe is obtained. The high-density polyethylene silicon core pipe prepared by the invention is very high in interlayer bonding strength and very excellent in flame retardant property and mechanical property.

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 belongs to the technical field of solid waste utilization, and particularly relates to a modified ZSM-5 molecular sieve catalyst and a preparation method and application thereof. The catalyst comprises a ZSM-5 molecular sieve and an active component, wherein the active component is loaded on the internal pore channel and the surface of the ZSM-5 molecular sieve; the active component comprises one or more of Zn, Fe, Ni, Co, Mo and Zr. By adjusting the loading capacity of the active components and the acidity of the catalyst and adjusting the interaction among the components of the catalyst, the high-density polyethylene plastic is used as a raw material, and the catalyst is simple in structure, single in element, free of oxygen element and low in by-product content; the modified ZSM-5 molecular sieve catalyst is simple in preparation process and low in production cost, and the catalyst takes high-density polyethylene plastic as a raw material, so that the yield of MAHs prepared by directional pyrolysis of the high-density polyethylene plastic as the raw material and the stability of the catalyst are effectively 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 a high-barrier polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-barrier polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 25 to 40 parts of high-density polyethylene, 15 to 30 parts of linear low-density polyethylene, 8 to 16 parts of ethylene-vinyl alcohol copolymer, 3 to 8 parts of nano montmorillonite, 5 to 10 parts of modified layered double hydroxide, 2 to 6 parts of nano silicon dioxide aerogel, 0.2 to 0.6 part of antioxidant 1076, 0.1 to 0.4 part of light stabilizer UV-770, 3 to 7 parts of tributyl citrate and 1 to 3 parts of octadecanamide. 1-3 parts of polyethylene wax, 0.6-1.2 parts of a silane coupling agent KH560 and 7-12 parts of a functional additive. According to the high-barrier polyethylene film disclosed by the invention, by using the modified layered double hydroxide and the functional additive, the barrier property and the antibacterial property are enhanced, the mechanical property is improved, the comprehensive performance is excellent, and the application prospect is good.

The invention relates to the field of films, in particular to a BOPP matt film and a preparation method thereof.The matt film comprises an upper surface layer, an upper subsurface layer, a core layer and a lower surface layer which are sequentially arranged, the upper subsurface layer and the upper surface layer with the thickness of 0.4-0.6 micrometer jointly form a matt layer with the thickness of 2 micrometers, the upper surface layer comprises polypropylene random copolymer and high-density polyethylene, and the lower surface layer comprises polypropylene random copolymer and high-density polyethylene. The upper surface layer comprises polypropylene random copolymer, high density polyethylene and 10-15 wt% of PMMA master batch, the content of monodisperse PMMA microspheres is 10 wt%, the particle size is 3.5-4.5 [mu] m, and both the core layer and the lower surface layer comprise homo-polypropylene. Through reasonable design of the particle size of the PMMA microspheres, the thickness of the upper surface layer and the thickness of the upper sub-surface layer, the PMMA microspheres protrude out of the surface of the upper surface layer to increase the surface roughness, the use amount of the high-density polyethylene in the upper surface layer is reduced, precipitation of the high-density polyethylene is reduced from the source, the production efficiency is improved, and the extinction uniformity is ensured.

The invention discloses a wastewater sampling device for constructional engineering, and relates to the field of engineering wastewater monitoring, the wastewater sampling device comprises a support frame and a driving mechanism, an annular plate is arranged below the support frame, a cross-shaped plate is fixed on the outer wall of the annular plate, four end parts of the cross-shaped plate are respectively provided with a hole for placing a sealing tank, a PH sensor is arranged on a support leg on one side of the support frame, and the PH sensor is connected with the driving mechanism. The bottom openings of the four sealing tanks are all provided with sampling barrels, and the four sampling barrels are respectively made of a polytetrafluoroethylene material, a brown glass material, a high-density polyethylene material and a common polyethylene material and are adaptive to highly corrosive wastewater, organic matter and oil wastewater, heavy metal wastewater and conventional neutral wastewater; the sampling barrels made of four special materials cover mainstream wastewater scenes of constructional engineering, the limitation that a single material is adaptive to various types of wastewater is avoided, the sampling barrels made of corresponding materials can be switched to sampling stations according to the basic types of the wastewater, the materials of the sampling barrels are ensured to be completely matched with the types of the wastewater, and detection data can truly reflect wastewater components.

The invention relates to the technical field of plastic packaging films, in particular to a casting CPE composite film material and a preparation method thereof.The casting CPE composite film material is characterized in that a corona layer is prepared from, by weight, 72-75 parts of LLDPE, 18-22 parts of LDPE, 5-6 parts of EVA and 1.5-2 parts of an opening slipping agent; the middle core layer is prepared from the following components in parts by weight: 70 to 75 parts of LLDPE (Linear Low Density Polyethylene), 20 to 25 parts of HDPE (High Density Polyethylene), 5 to 8 parts of mPE, 3 to 5 parts of modified nano silicon dioxide and 1 to 3 parts of processing aid; the heat sealing layer is prepared from the following components in parts by weight: 25 to 30 parts of mLLDPE, 68 to 72 parts of LDPE, 0.3 to 0.5 part of antistatic agent and 1 to 2 parts of processing aid. The prepared composite film material has multiple functions of flame retardance, aging resistance, static electricity resistance and the like on the basis of keeping excellent heat sealing performance and mechanical strength.

The invention discloses a preparation method of a nano silicon dioxide modified high-density polyethylene wear-resistant plate, and belongs to the technical field of polyethylene plates, the method comprises the following steps: firstly preparing an antioxidant PMMA microcapsule, then preparing titanium dioxide and silicon dioxide, and modifying by KH550 to obtain modified nano titanium-silicon composite particles; then, an antioxidant coated PMMA microcapsule, the modified nano titanium-silicon composite particles, POE-g-MAH and HDPE particles are premixed, and the wear-resistant plate is obtained through twin-screw extrusion granulation and pulsating force field assisted molding; through the synergistic effect of the antioxidant coated PMMA microcapsule, the modified nano titanium-silicon composite particles and the compatilizer POE-g-MAH, the problems that the wear resistance of the HDPE plate is insufficient and the antioxidant is easily adsorbed by nano silicon dioxide to cause aging resistance attenuation are solved, and the wear resistance, thermal oxidation / light aging resistance and mechanical property improvement of the plate are realized; and the requirements of high-frequency wear scenes such as mine conveying and outdoor engineering can be met.

The invention discloses a flame-retardant cable and a preparation method thereof. The cable comprises conductor wire cores, a fireproof layer, an insulating layer, a shielding layer, a filling layer and a sheath layer from inside to outside. According to the cable sheath layer, 100 parts of high density polyethylene (HDPE), 5-15 parts of ethylene-vinyl acetate rubber and 3-10 parts of fluororubber are used as main materials, triallyl isocyanurate and bisphenol A diallyl ether are introduced for synergistic crosslinking, and nano montmorillonite is used as an auxiliary material, so that a compact interpenetrating network is constructed. The tensile strength of the sheath layer composite material is greater than or equal to 26.5 MPa, the elongation at break is greater than or equal to 387%, the performance retention rate is greater than 92% after the sheath layer composite material is soaked in slurry for 28 days, the limit oxygen index is greater than 38%, the water vapor transmission coefficient is less than or equal to 1.5 * 10 <-4 > g.mm / (m < 2 >. D.Pa), and the sheath layer composite material has excellent flame retardance, barrier property and slurry resistance and is suitable for harsh outdoor environments such as rail transit.

The invention relates to a basalt reinforced high-density polyethylene composite material as well as a preparation method and application thereof. The basalt reinforced high-density polyethylene composite material comprises high-density polyethylene, a modified basalt reinforced filler and a compatibilizer, the basalt reinforced filler comprises modified basalt fibers and modified basalt scales. The modified basalt fibers and the modified basalt scales are added into the high-density polyethylene, the modified basalt fibers construct a three-dimensional supporting network to bear main loads, and the sheet structures of the modified basalt scales can prevent the material from deforming in the two-dimensional direction; the basalt reinforced high-density polyethylene composite material and the preparation method thereof have the advantages that the mechanical strength of the basalt reinforced high-density polyethylene composite material is enhanced synergistically, the prepared basalt reinforced high-density polyethylene composite material has the advantages of excellent mechanical strength, good wear resistance and corrosion resistance and the like, and the long-term use requirement of the material in a sea wave high-frequency friction environment is met.

The invention relates to the technical field of wires and cables, and particularly discloses a mining extrusion-resistant wear-resistant cable with a tensile enhancement layer and a preparation method thereof. The invention relates to a mining extrusion-resistant wear-resistant cable with a tensile enhancement layer. The mining extrusion-resistant wear-resistant cable comprises a wire core conductor, an insulating layer, an inner sheath, the tensile enhancement layer and an outer sheath from inside to outside, the outer sheath and the inner sheath are made of the same raw material; the inner sheath comprises the following raw materials: high-density polyethylene, epoxidized soybean oil, a compound lubricant, a compound wear-resistant filler, a flame retardant, an antioxidant and an ultraviolet light absorber; the compound lubricant is a compound of calcium stearate and oxidized polyethlene wax; the compound wear-resistant filler is a compound of nano polytetrafluoroethylene and silicon carbide. According to the extrusion-resistant and wear-resistant cable for the mine, the tensile strength and the elongation at break can reach 24.9 MPa and 450% to the maximum extent, the wear resistance is 96 mm < 3 > to the minimum extent, and the wear resistance and the pressure resistance of the extrusion-resistant and wear-resistant cable for the mine are improved.

The invention relates to the technical field of cables, and provides a crosslinked polyethylene high-voltage cable which comprises a conductor, an insulating layer and a protective sleeve which are arranged from inside to outside. The protective sleeve comprises the following components in parts by weight: 50-80 parts of high-density polyethylene, 0.5-1 part of a cross-linking agent, 10-20 parts of a composite flame retardant, 0.5-1 part of an antioxidant, 0.5-1 part of a lubricant, 2-3 parts of polyethylene grafted maleic anhydride and 1-2 parts of carbon black. The flame-retardant monomer disclosed by the invention has the beneficial effects that the flame-retardant monomer has phosphorus-nitrogen synergistic flame-retardant and interface enhancing functions. The thiadiazole ring acts with the surface of aluminum hydroxide, so that the dispersity is improved, the mechanical property of the material is enhanced, and the flame-retardant efficiency is improved. The aluminum hydroxide is more efficient in thermal decomposition after being uniformly dispersed, and cooperates with the gas-phase flame-retardant and char-forming effects of the flame-retardant monomer to form a compact protective layer, so that the integration of flame retardance and enhancement is realized. And aluminum hydroxide with good dispersion can also be used as a rigid particle reinforced matrix, so that stress concentration is avoided.

The invention discloses a polyethylene composite geomembrane and a processing technology thereof in the field of geosynthetic materials. The polyethylene composite geomembrane is prepared from the following raw materials: high-density polyethylene, polyethylene grafted maleic anhydride, a nano montmorillonite / low-density polyethylene composite modifier, an antioxidant, a light stabilizer and a lubricant calcium stearate. Wherein the polyethylene grafted maleic anhydride is prepared by drying high-density polyethylene, mixing the dried high-density polyethylene with maleic anhydride, an initiator and an antioxidant, and performing melt extrusion through a double-screw extruder, so that the surface polarity is improved; the nano-montmorillonite / low-density polyethylene composite modifier is prepared by ultrasonically dispersing Na-montmorillonite, adding hexadecyl trimethyl ammonium bromide, stirring, centrifugally drying to obtain organic modified montmorillonite, mixing the organic modified montmorillonite with low-density polyethylene, performing intercalation reaction, and performing twin-screw extrusion and blending, so that the barrier property is enhanced. The processing technology comprises the steps of raw material mixing, twin-screw extrusion granulation and calendaring molding, and finally the polyethylene composite geomembrane with remarkably improved interface cohesiveness, weather resistance and barrier property is prepared.

The invention belongs to the technical field of lining oil pipes, and particularly relates to a lining oil pipe and a preparation method thereof. The lining oil pipe is prepared from the following raw materials in parts by mass: 70-90 parts of ultra-high molecular weight polyethylene, 8-13 parts of high-density polyethylene, 7-12 parts of modified carbon nanotubes, 2-5 parts of reinforcing filler, 3-6 parts of a compatilizer, 0.1-0.3 part of a calcium-zinc composite stabilizer and 0.05-0.2 part of a lubricant. The prepared lining oil pipe has excellent tensile strength, toughness, chemical stability and the like.

A lap-sealable film comprises a non-oriented film, a heat-resistant lacquer (HRL), and a sealing layer. The non-oriented film comprises a first outer layer and a second outer layer. The first outer layer comprises a first polymeric blend having a low density polyethylene (LDPE) and an ethylene copolymer. The second outer layer comprises a non-oriented high density polyethylene (HDPE). The HRL is attached to the first outer layer and is coextensive with less than 100%, by area, of the exterior surface of the first outer layer. The sealing layer comprises an ethylene copolymer or a second polymeric blend having a LDPE and an ethylene copolymer. The ethylene copolymer has a density less than or equal to 0.92 g / cm3. The first polymeric blend has a seal initiation temperature less than or equal to 110°C. The lap-sealable film comprises a total composition having greater than or equal to 80% polyethylene.

The invention discloses a polypropylene composite material as well as a preparation method and application thereof. The polypropylene composite material comprises the following components in parts by weight: 50-80 parts of polypropylene resin; 4-10 parts of high density polyethylene; 5-15 parts of a polyolefin elastomer; 10 to 20 parts of talcum powder; 1 to 4 parts of polypropylene grafted polysiloxane; and 0.05 to 0.3 part of a beta crystal form nucleating agent. According to the polypropylene composite material disclosed by the invention, polypropylene is grafted with high-molecular-weight polysiloxane, and a specific nucleating agent is added, so that the crystal form of polypropylene is optimized, a more uniform microstructure is formed, a large spherocrystal boundary is reduced, a more uniform dispersion environment is provided for silicone molecules, local enrichment is avoided, and the mechanical property of the polypropylene composite material is improved. Therefore, the injection molding floating problem is effectively improved, and meanwhile, the high scratch resistance of the material is guaranteed. The high-performance polypropylene composite material which has excellent scratch resistance and good appearance at the same time is realized.

The invention discloses a multi-layer polymeric membrane functional current collector and a preparation method thereof, a pole piece and a battery, and the preparation process comprises the following steps: S1, blending and granulating ultra-high molecular weight polyethylene and high density polyethylene to prepare a composite layer raw material; s2, adding the composite layer raw material and the middle layer nylon raw material into a screw extruder, and carrying out co-extrusion casting to form a composite layer-middle layer-composite layer three-layer structure film; s3, carrying out plasma activation treatment on the obtained three-layer structure film; s4, forming nanoscale pits in the outer surface of the three-layer structure film by dipping the three-layer structure film in the treating fluid; and S5, preparing a metal layer on the outer side of the three-layer structure film to obtain the multi-layer polymer film functional current collector. Through material blending optimization, multi-layer structure design and surface functionalization treatment, the mechanical property and dimensional stability of the current collector base film and the binding force between the current collector base film and a metal coating are remarkably improved.

The invention discloses a preparation method of a high-flexibility torsion-resistant drag chain cable, which at least comprises the following steps: forming an insulating layer on the surface of a wire core, and forming a sheath layer on the surface of the insulating layer; the sheath layer is prepared from the following raw materials in parts by weight: 35 to 45 parts of high-density polyethylene, 25 to 35 parts of low-density polyethylene, 15 to 20 parts of ethylene-vinyl acetate copolymer, 10 to 15 parts of additive, 0.8 to 1.3 parts of antioxidant, 0.5 to 1 part of lubricant and 5 to 8 parts of filler. The beneficial effects are that the additive is introduced into the sheath layer, the unique benzoxazine ring structure forms a cross-linked network at high temperature, molecular chain slippage is effectively restrained, and anti-torsion stability and mechanical strength of the material are enhanced. In addition, the additive inhibits performance degradation in a high-temperature environment through a rigid supporting structure and heat resistance, and meanwhile, the flame retardant property is improved.

The invention relates to the technical field of polyethylene packaging films, and particularly discloses an antibacterial polyethylene composite packaging film and a preparation method thereof.The antibacterial polyethylene composite packaging film comprises an inner layer, a middle layer and an outer layer, the inner layer is prepared from the following raw materials in parts by weight: 60 to 80 parts of low-density polyethylene, 25 to 35 parts of polypropylene, 4 to 6 parts of modified filler, 0.3 to 0.6 part of antioxidant and 1 to 3 parts of compatilizer; the middle layer is prepared from 62 to 75 parts of high-density polyethylene, 28 to 40 parts of ethylene-vinyl alcohol copolymer, 0.8 to 1 part of anti-binding agent and 2 to 5 parts of compatilizer; the outer layer comprises 55-70 parts of high-density polyethylene, 35-45 parts of metallocene polyethylene, 12-25 parts of nylon, 4-10 parts of antibacterial modified montmorillonite and 3-6 parts of compatilizer, the polyethylene composite packaging film has good processability and good stability, the composite film adopts a double-layer antibacterial design of the inner layer and the outer layer, the middle layer has excellent barrier property and good compactness, and the polyethylene composite packaging film is suitable for being used as a packaging film. The composite packaging film has excellent antibacterial performance and mechanical performance and good comprehensive performance.

The invention discloses a production method of a vehicle gauge grade MLCC release base film. The base film comprises an outer layer, a middle layer and an inner layer. The outer layer is prepared from PET, silane coupling agent modified nano zinc oxide, organic silicon modified acrylate and an antioxidant; the middle layer is prepared from PET (Polyethylene Terephthalate), ethylene propylene diene monomer, nano silicon dioxide, organic montmorillonite and PP-g-MAH (Maleic Anhydride); the inner layer is composed of PET, a high-density polyethylene / butadiene styrene rubber composite modifier, graphene oxide and multi-walled carbon nanotubes. The prepared vehicle gauge grade MLCC release base film has excellent mechanical properties and thermal stability.

The invention discloses an oxide-enhanced, high-strength and high-temperature-resistant diaphragm and a preparation method thereof, and belongs to the technical field of battery diaphragms. The diaphragm is of a three-layer co-extrusion structure, a surface layer is composed of a block olefin polymer and a styrene elastomer, the block olefin polymer comprises soft chain segment polyethylene and hard chain segment polyolefin containing rigid groups, the styrene elastomer is a block copolymer with an (S) m-(P / B) n-(S) m microphase separation structure, and the thickness of the styrene elastomer is 1-10 micrometers. And the middle layer consists of high-density polyethylene and hydrophobically modified oxide. The preparation method comprises the following steps: synthesis of the block olefin polymer, three-layer co-extrusion sheet casting, two-way stretching, extraction drying, secondary transverse stretching and heat setting. Through molecular structure design and multiphase compounding, the mechanical strength, the membrane rupture temperature and the thermal stability of the diaphragm are synergistically improved, meanwhile, good electrolyte wettability and processing consistency are kept, the problems that a traditional wet-process diaphragm is poor in temperature resistance and insufficient in strength are effectively solved, and the safety of a lithium battery is remarkably improved.

The invention relates to a self-cleaning anticorrosive material and a preparation method thereof, and belongs to the technical field of anticorrosive materials. The preparation method comprises the following steps: preparing a self-made modifier, modifying high-density polyethylene through the modifier to obtain modified high-density polyethylene, and blending the modified high-density polyethylene with polydimethylsiloxane and fumed silica to obtain the self-cleaning anticorrosive material. Nano silicon dioxide particles can be fixed on the surface of high-density polyethylene through silicon-oxygen-silicon covalent bonds and are similar to the main chain structure of polydimethylsiloxane, so that the three phases have good interfacial compatibility, and the polydimethylsiloxane has excellent chemical inertness and hydrophobicity, so that the surface of the high-density polyethylene is protected. After being blended with polyethylene, the material has good hydrophobicity, so that the self-cleaning anti-corrosion characteristic is realized.

The invention relates to the technical field of waterproof coiled materials, and provides an anti-aging film for a waterproof coiled material and a preparation method thereof.The anti-aging film is formed by crossing and compounding multiple layers of films, and the multiple layers of films sequentially comprise an inner layer film, a middle layer film and an outer layer film from top to bottom; wherein the outer-layer film comprises the following components in parts by weight: 80-90 parts of high-density polyethylene, 6-8 parts of black masterbatch, 10-15 parts of hydroxyl nicotinic acid compound modified carbon black, 1-2 parts of an antioxidant and 2-4 parts of a plasticizer, the modified carbon black is hydroxyl nicotinic acid compound modified carbon black, and the inner-layer film and the middle-layer film are polymer film layers. According to the technical scheme, the problem that in the prior art, the aging resistance of the film for the waterproof roll is poor is solved.

The invention provides a polyethylene composite film. The polyethylene composite film comprises a surface layer, a middle layer and a heat sealing layer which are sequentially stacked, wherein the surface layer is composed of 58%-76% of hexene copolymerized metallocene linear low density polyethylene, 18%-37% of low density polyethylene and a small amount of slipping agent and anti-blocking agent; the middle layer is composed of 79%-88% of octene copolymerized metallocene medium density polyethylene, 5%-21% of hexene copolymerized metallocene linear low density polyethylene and 6%-15% of high density polyethylene; and the heat sealing layer is composed of 47%-65% of hexene copolymerized metallocene linear low density polyethylene, 33%-45% of low density polyethylene and 2%-5% of a tackifier. According to the composite film disclosed by the invention, through gradient design of each layer of material, the whole composite film has rigidity and toughness, and the composite film is particularly suitable for manufacturing stand-up bag packages which stand stably and are compression-resistant and impact-resistant.