1530 results about "High-density polyethylene" patented technology

The invention discloses a metallocene polyethylene material, a composite mulching film and a preparation method thereof, and the metallocene polyethylene material comprises the following raw materials by mass: 75-85 parts of metallocene polyethylene resin, 15-25 parts of high density polyethylene, 0.05-0.2 part of a main antioxidant, 0.1-0.25 part of an auxiliary antioxidant, 1-2 parts of silane coupling agent modified nano zinc oxide, and 1-2 parts of silane coupling agent modified mica powder. And 0.05 to 0.2 part of a slipping agent. The prepared metallocene polyethylene composition has the advantages of excellent processability, tensile strength, mechanical strength, aging resistance and the like.

The invention discloses a high-strength directly-buried optical cable and a preparation method thereof. Comprising at least one reinforcing piece, at least one cable core, a water-blocking tape layer, an inner protective layer, an armor layer and a high-strength outer sheath, wherein the cable core surrounds the reinforcing piece, is twisted and is filled with water-blocking cable paste; the water-blocking tape layer wraps the cable core; the inner protective layer wraps the water-blocking tape layer; wherein the cable core is composed of a loose tube filled with water-blocking fiber paste and at least one light-guide fiber accommodated in the loose tube; wherein the high-strength outer sheath is prepared from the following raw materials in parts by weight: 80 to 85 parts of high-density polyethylene, 15 to 20 parts of nylon 612, 8 to 12 parts of compatilizer, 15 to 20 parts of modified silicon dioxide, 1 to 3 parts of antioxidant and 0.7 to 1.1 parts of lubricant. The high-strength directly-buried optical cable has excellent high strength, aging resistance and wear resistance, the service life of the optical cable is remarkably prolonged, and the transmission reliability of the optical cable is remarkably improved.

The invention discloses a high-strength polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-strength polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of high-density polyethylene, 25 to 35 parts of linear low-density polyethylene, 12 to 18 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of nano silicon dioxide, 3 to 7 parts of organic montmorillonite, 1.5 to 3.5 parts of hindered amine light stabilizer, 1.5 to 2.5 parts of antioxidant 1010, 0.8 to 1.2 parts of calcium stearate, 0.8 to 1.2 parts of zinc stearate, 0.8 to 1.2 parts of silane coupling agent and 4 to 6 parts of maleic anhydride grafted polyethylene. The composite material is prepared from the following components in parts by weight: 1.5-3.5 parts of a quaternized chitosan-nano silver compound, 6-9 parts of a modified toughening agent, 4-7 parts of a modified heat-resistant agent, 1.5-3.5 parts of a processing aid, 0.15-0.35 part of dibenzoyl peroxide and 0.5-1.5 parts of a nucleating agent DBS. The composite material is excellent in comprehensive performance, high in strength, good in flexibility and puncture resistance, excellent in aging resistance, heat resistance, chemical resistance and antibacterial property, good in processability, capable of meeting the requirements of multiple fields such as packaging and agriculture, scientific in preparation method and high in practical value.

The present invention relates to the technical field of regenerated plastics, and in particular relates to a flame-retardant regenerated plastic and a preparation method therefor. The regenerated plastic comprises the following specific components: 90-100 parts of regenerated high-density polyethylene, 5-10 parts of high-density polyethylene, 1-2 parts of calcium stearate, 1-2 parts of carbon black, 8-12 parts of maleic-anhydride-grafted polyethylene, 2-3 parts of an antioxidant, and 6-8 parts of a polyurethane elastomer. The regenerated high-density polyethylene is used as a main material, the high-density polyethylene is added thereto, the maleic-anhydride-grafted polyethylene is used as a compatibilizer, and then polyhydroxy polybutadiene, epoxidized hydroxyl-terminated polybutadiene and polypropylene oxide glycol are compounded and react with diphenylmethane diisocyanate to generate a polyurethane elastomer, thereby toughening the regenerated polyethylene; moreover, a flame-retardant effect is achieved by means of the synergy of phosphorus and nitrogen; therefore, a regenerated polyethylene plastic with high tensile strength and good flame-retardant performance is prepared. The regenerated plastic can be widely used in a plurality of fields, and has a relatively high level of practicability.

The invention discloses a polyethylene composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The polyethylene composite material comprises the following components in parts by weight: 100 parts of high-density polyethylene, 6-20 parts of a high-density polyethylene reclaimed material, 3-16 parts of ultra-high molecular weight polyethylene, 1-6 parts of a compatilizer, 1-2 parts of an inorganic filler and 1-2 parts of a flow modifier, 2-3 parts of color master batch; wherein the viscosity average relative molecular weight of the ultra-high molecular weight polyethylene is 1,000,000-2,000,000, and the test standard is ASTM (American Society for Testing Material) D4020. According to the polyethylene composite material disclosed by the invention, part of the high-density polyethylene recycled material is doped, and the interface bonding force between the new high-density polyethylene material and the high-density polyethylene recycled material is improved through the synergistic effect of the ultra-high molecular weight polyethylene, the compatilizer and the inorganic filler; the mechanical property and the wear-resisting property of the polyethylene composite material doped with the high-density polyethylene reclaimed material are improved.

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 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.

The invention relates to the technical field of cables, and provides a flexible corrosion-resistant robot cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer and an outer sheath layer from inside to outside, and is characterized in that the cable core sequentially comprises a conductor and an insulating layer from inside to outside; the outer sheath layer comprises the following raw material components in parts by weight: 60-70 parts of high-density polyethylene, 15-25 parts of an ethylene-tetrafluoroethylene copolymer, 0.5-1.5 parts of an antioxidant, 1-3 parts of a plasticizer, 8-12 parts of a flame retardant, 10-20 parts of polyethylene glycol diacrylate composite barium sulfate and 1-2 parts of a lubricant; the polyethylene glycol diacrylate composite barium sulfate is prepared from the following raw materials: polyethylene glycol diacrylate, barium chloride and sodium sulfate. According to the technical scheme, the problem of poor corrosion resistance of the robot cable in the prior art is solved.

The present invention discloses a medium-voltage longitudinal water-blocking cable with a large cross-section and a preparation method thereof. The cable includes a conductor, a conductor shield, an insulation layer, a non-metallic insulation shield, a metal shielding layer, an inner sheath, and an outer sheath from the inside to the outside. The conductor is a multi-layer tightly compressed stranded wire conductor, and a water-blocking tape is filled and wrapped between each layer of the stranded wire conductor; the materials of the inner sheath and the outer sheath are both high-density polyethylene. The structure of the present invention is more compact, simple, and lightweight, thus solving the longitudinal water-blocking requirement of the stranded conductor, while having good anti-overload and large short-circuit current withstand capabilities, and being conducive to the vulcanization and sealing connection of matching connectors or joints.

The invention discloses a super-strong mute building drainage pipe and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by mass: 100 parts of high-density polyethylene, 5-7 parts of a cold-resistant toughening agent, 8-12 parts of a synergist, 8-10 parts of a sound insulation filler and 0.3-0.5 part of an antioxidant. By introducing the synergist prepared from the components such as polyamine polyether methylene phosphonic acid, zinc nitrate hexahydrate, magnesium nitrate hexahydrate and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drainage pipe can be effectively improved; by introducing the sound insulation filler prepared from the modified halloysite nanotubes, hydroxyl-terminated polydimethylsiloxane, aziridine cross-linking agent and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drain pipe are further improved. Therefore, the drainage pipe prepared by the invention has a wider application prospect.

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.

The invention relates to the technical field of metal powder injection molding, in particular to an MIM titanium alloy binder and application of the MIM titanium alloy binder to preparation of high-plasticity TC4 parts. The MIM titanium alloy binder comprises polyformaldehyde, aluminum stearate, polyethylene, queen bee wax and high-density polyethylene. According to the MIM titanium alloy binder, polyformaldehyde serves as a main component, high-melting-point bee wax and aluminum stearate are introduced, the bee wax can improve the thermal stability of a lubricant, aluminum stearate can inhibit volatilization of Al element, the rheological property and sintering behavior of feeding are remarkably optimized, the number of titanium alloy feeding cycles and the density after sintering can be increased, and the O content can be reduced.

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.

A method of increasing bubble stability of a needful high molecular weight bimodal high-density polyethylene resin in need thereof, the method comprising subjecting the needful high molecular weight bimodal high-density polyethylene resin to a determined amount of oxygen tailoring of the resin so as to independently increase both the resin's melt storage modulus G′ (at G″=3000 pascals) and complex viscosity ratio SH1000, and thereby make an oxygen-tailored high molecular weight bimodal high-density polyethylene resin having a targeted increase in bubble stability. The method uses a tailoring effective amount of molecular oxygen (O2) to achieve the desired oxygen tailoring. The method uses these advanced rheological properties from dynamic mechanical spectroscopy, but analyzes the data in a different way that is more sensitive to changes in resin composition and properties, and yet achieves a resin regime having a targeted increase in bubble stability.

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 provides an ultra-high molecular weight polyethylene fiber woven reinforced polyethylene / polyvinyl chloride composite pipe and a preparation method thereof. The composite pipe is of a five-layer composite structure and comprises a high-density polyethylene core pipe on the inner layer, an ultra-high molecular weight polyethylene fiber woven reinforcement layer on the middle layer, a polyvinyl chloride coated pipe on the outer layer, a first adhesive layer and moisture curing reaction type polyurethane hot melt adhesive on the second adhesive layer. The preparation method of the composite pipe comprises the steps of inner layer core pipe preparation, polyurethane hot melt adhesive coating, fiber woven reinforcement layer forming, secondary polyurethane hot melt adhesive coating, outer layer wrapping and the like. The fiber performance is protected by adopting a low-temperature process, and efficient bonding is realized; the ultra-high molecular weight polyethylene fibers are alternately woven and wound to form the grid reinforcing layer, so that the pipe is endowed with high strength and impact resistance. The problems that a traditional composite pipe is prone to layering between layers, insufficient in pressure bearing capacity, complex in construction connection and the like are solved, and the composite pipe has the advantages of being high in strength, resistant to corrosion, easy to connect and the like.

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 relates to the technical field of cables, and provides a long-life cable for nuclear power, which sequentially comprises a conductor, an insulating layer, a shielding layer and a sheath layer from inside to outside, the sheath layer comprises the following components in parts by weight: 60-70 parts of high-density polyethylene, 12-22 parts of carboxy nitrile rubber, 4-8 parts of a styrene-acrylonitrile copolymer, 0.5-8 parts of a copper metal organic complex, 8-15 parts of palygorskite powder, 2-5 parts of zinc oxide, 0.5-1.3 parts of an antioxidant, 1-3 parts of a plasticizer and 0.2-0.5 part of a vulcanizing agent; the copper metal organic complex comprises copper trifluoromethanesulfonate and copper acetylacetonate in a weight ratio of (1-3): 1. According to the technical scheme, the problem of poor aging resistance of the sheath layer of the nuclear power cable in the prior art is solved.

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 field of films, in particular to a low-temperature-resistant polypropylene matt film, a preparation method thereof and a cold laminating composite film, the matt film comprises a matt layer, a core layer and a laminating layer which are arranged in sequence; the matt layer comprises 45-55 wt% of polypropylene random copolymer and 45-55 wt% of high-density polyethylene, the core layer comprises homo-polypropylene and 5-10 wt% of poly (1, 4-butylene glycol-1-butylene random copolymer, and the laminating layer comprises homo-polypropylene and 2-5 wt% of n-alkyl maleate grafted modified ethylene-vinyl acetate copolymer. The matt film disclosed by the invention has proper flexibility in a low-temperature environment, proper adhesive force still exists between the fitting layer and the adhesive layer, and the matt film is smooth to wind and unwind during manufacturing and can be used as a base film of a low-temperature-resistant cold laminating film.