206 results about "Polyethylene membrane" patented technology

The invention provides a diepoxy alkoxy anthracene photosensitizer, and relates to the field of photopolymerization. The invention further comprises a light-cured resin composition containing the diepoxy alkoxy anthracene photosensitizer, a light-sensitive dry film containing the diepoxy alkoxy anthracene photosensitizer and application of the light-cured resin composition and the light-sensitive dry film. The photosensitizer provided by the invention has the characteristics of low migration before curing and low precipitation after curing, and is excellent in photosensitive property and high in photobleaching efficiency; the polymer can be widely applied to the fields of photopolymerization and photocuring of dry films, paints, coatings, printing ink, forming materials and the like; in a photosensitive dry film, the photosensitizer cannot migrate to a polyethylene film, and when an electroplating process is carried out after exposure and development, fragments cannot be separated out to pollute electroplating liquid, so that undesirable phenomena of short circuit, open circuit and the like of an anti-corrosion pattern are avoided, and the yield of a product is remarkably improved.

The invention relates to a liquid metal gel material, a preparation method thereof and a thermal interface material, and belongs to the field of thermal interface materials. Wherein the liquid metal gel material comprises a modified polyethylene film, and the modified polyethylene film comprises a polyethylene film and metal particles attached to at least part of the surface of the polyethylene film; the modified polyethylene film is at least partially filled with the liquid metal. The liquid metal gel material provided by the invention has the advantages of low thermal resistance, high thermal conductivity, excellent mechanical properties and high stability in a dynamic environment, and can meet the use requirements of high-end fields on thermal interface materials.

The invention discloses a preparation method of a solvent-resistant nanofiltration membrane and the solvent-resistant nanofiltration membrane. The preparation method comprises the following steps: infiltrating a polyethylene-based membrane; performing hydrophilic modification treatment on the infiltrated polyethylene base membrane by using a hydrophilic modification solution to obtain a precursor base membrane; preparing a water phase solution containing UiO-66, and preparing an oil phase solution containing polyfunctional aromatic acyl chloride; performing interfacial polymerization reaction on the surface of the precursor base membrane by using the water-phase solution and the oil-phase solution to obtain a polyethylene nanofiltration membrane; performing cross-linking treatment on the polyethylene nanofiltration membrane by using a cross-linking solution to obtain the solvent-resistant nanofiltration membrane, wherein the solute of the hydrophilic modification solution comprises dopamine and polyethyleneimine. Hydrophilic modification treatment of dopamine and polyethyleneimine is carried out on the polyethylene film, and UiO-66 nanoparticles are added into a water-phase solution, so that the flux and the interception performance of the film are remarkably improved.

The invention discloses a fireproof flame-retardant battery diaphragm, a preparation method thereof and a fireproof flame-retardant battery, and relates to the technical field of battery diaphragms. When the fireproof flame-retardant battery diaphragm is prepared, boric acid diglyceride and chlorinated trimellitic anhydride mixed liquor react to prepare a flame-retardant monomer; the preparation method comprises the following steps: polymerizing 4, 4 '-diaminodiphenyl ether and a flame-retardant monomer, and carrying out electrostatic spraying to prepare polyamide acid microspheres; dehydrating and drying the polyamide acid microspheres to obtain polyimide microspheres; performing etching-acidification on the polyimide microspheres to prepare carboxylated polyimide microspheres; allyl phosphoric acid and acrylic acid are copolymerized and grafted on the surface of a polyethylene film to prepare a modified polyethylene film; and coating the surface of the modified polyethylene film with the carboxylated polyimide microspheres to prepare the fireproof flame-retardant battery diaphragm. The prepared fireproof flame-retardant battery diaphragm has excellent flame retardance, wetting performance and thermal stability.

The invention relates to the field of high polymer material processing, and discloses an antifogging antibacterial PE film production process, which comprises: S1, raw material blending and mixing: blending low density polyethylene, linear low density polyethylene, a bio-based antifogging agent, a modified zinc oxide-graphene composite antibacterial agent, a polylactic acid compatibilizer and a slipping agent according to a ratio, mixing through a double-screw extruder, and adopting temperature gradient control; s2, three-layer co-extrusion film blowing: preparing a polyethylene film with a three-layer structure by adopting a three-layer co-extrusion film blowing process; s3, traction and rolling are conducted, specifically, the film is pulled through a traction device, the traction speed is controlled in a segmented mode, and rolling is center surface friction rolling; and S4, slitting and packaging. By adopting the modified zinc oxide-graphene composite antibacterial agent and utilizing the synergistic effect of zinc oxide nanoparticles and graphene, the antibacterial rate of the film reaches 90%-95% and is improved compared with 70%-75% of common zinc oxide, and the antibacterial ability of the film is enhanced.

The embodiment of the utility model provides a photovoltaic backboard and a solar photovoltaic panel. The photovoltaic backboard comprises an outer layer, a first adhesive layer, a middle layer, a second adhesive layer and an inner layer which are arranged in sequence, the outer layer adopts a polyethylene glycol terephthalate film; the first adhesive layer is used for bonding the outer layer and the middle layer; the middle layer is made of a continuous glass fiber reinforced thermoplastic polyester composite material; the second adhesive layer is used for bonding the middle layer and the inner layer; and the inner layer adopts a polyethylene film. The photovoltaic backboard is light in weight and high in strength, and has more excellent insulativity, aging resistance, environmental erosion resistance and dimensional stability.

A freight vehicle has a cargo space that is convertible for handling piece goods and is also suitable for hauling liquid bulk material. A conventional cargo space is equipped with a drop-down frame and flexible liquid enclosure that is stowed in the ceiling of the trailer while hauling a full load of palletized or piece goods materials that can be lowered to the floor for transporting liquid bulk loads. Generally, the long tubular (round and or oval in shape from an end view) can be fitted with a polyethylene film disposable liner. The disposable poly liner will ensure the liquid freight is free from contamination. This concept not only eliminates the need for a liquid tanker to be washed out between each load but also allows for the hauling of piece goods freight when the frame system is raised back to the ceiling.

The invention belongs to the technical field of total heat exchange membranes for fresh air systems, and relates to a cleanable, efficient and environment-friendly total heat exchange membrane and a preparation method thereof. The total heat exchange membrane comprises a base membrane and a membrane casting layer compounded on the surface of the base membrane, the base membrane is a wet-process double-drawing polyethylene membrane, and the membrane casting solution comprises a high-molecular polymer and a moisture absorbent and can also comprise a modifier. The high-molecular polymer is one of polyvinyl alcohol, sodium alginate, chitosan, polyvinylpyrrolidone and polyurethane; the moisture absorbent is one of common metal chloride and glycerol; and the modifier is one of malic acid, calcium chloride and magnesium chloride. When the water resistance of the film is improved, the film has high moisture permeability and can be recycled; the total heat exchange membrane prepared by the method is simple in process, low in cost, good in moisture permeability and gas barrier property, and suitable for being used as a total heat exchanger of a fresh air system, and secondary pollution is avoided.

The invention discloses a steam eyeshade with effects of soothing nerves and helping sleep and a preparation method of the steam eyeshade. The steam eyeshade comprises an eyeshade body, and ear hooks are connected to the two sides of the eyeshade The eyeshade body comprises an inner layer and an outer layer, and a heat insulation layer, a micro-bead massage layer, a double-U-shaped heating unit and a filtering layer are sequentially arranged from the inner layer to the outer layer. And a far infrared ceramic powder coating is arranged on one side, facing the double-U-shaped heating unit, of the filter layer. The inner layer and the outer layer are non-woven fabrics, the heat insulation layer is a polyethylene-polyvinylidene fluoride microporous composite membrane, and the filter layer is a polyethylene microporous membrane. Wherein the micro-bead massage layer is mainly prepared from aluminum oxide micro-beads with the diameter of 0.8-1.2 mm, compound essential oil, natural plant extract liquor and polyvinyl alcohol. The steam eyeshade prepared by the invention is comfortable to wear, safe and environment-friendly, and can keep constant temperature for more than 30 minutes; the eye mask can massage eye skin, relieve fatigue, fade fine lines around eyes and dark circles, soothe the nerves and help sleep.

The invention relates to the technical field of polyethylene film materials, in particular to a weather-resistant flame-retardant PE composite film and a preparation method thereof.The preparation method comprises the following steps that S1, a PE-based copolymer, an antioxidant and a light stabilizer are mixed and then discharged; s2, mixing LDPE resin, magnesium hydroxide, a silane coupling agent and zinc stearate, and discharging; s3, the outer-layer mixture and the core-layer mixture are put into a double-screw extruder for melt extrusion granulation and drying, and outer-layer master batches and core-layer master batches are obtained; and S4, respectively putting the outer-layer master batch and the core-layer master batch into an extruder for extrusion, and carrying out three-layer co-extrusion casting film forming, cooling shaping and rolling to obtain the weather-resistant flame-retardant PE composite film. The weather-resistant flame-retardant PE composite film obtained by the preparation method disclosed by the invention has relatively good weather resistance and flame retardance.

The present invention discloses a photosensitive resin composition containing an anthracene-based chalcone photosensitizer and its application. The photosensitive resin composition includes an anthracene-based chalcone photosensitizer, and the anthracene-based chalcone photosensitizer includes at least one anthracene derivative represented by general formula (I) to (III); #imgabs0# wherein: R 1 The anthracene chalcone is selected from the group consisting of a C1-C5 straight-chain or branched alkyl group, an N-methylpyrrole-2-yl group, a furan-2-yl group, a benzofuran-2-yl group, a thiophene-2-yl group, a naphthalene-2-yl group, a phenyl group, and a substituted aryl group. In the present invention, anthracene chalcone is used as a photosensitizer for the photosensitive resin composition. The photosensitizer does not migrate into the polyethylene film (PE), and in the electroplating process after exposure and development, small molecular fragments are not precipitated to contaminate the electroplating solution, thereby avoiding adverse phenomena such as short circuit and open circuit of the resist pattern and significantly improving the yield rate of the product.

The present invention relates to a layered polyethylene MDO film comprising high amounts of a specific ethylene copolymer with a narrow molecular weight distribution in a layer. This film provides a high stiffness and excellent adhesion properties. The invention further relates to a barrier film comprising a metal layer or barrier coat and the aforementioned layered polyethylene MDO film, to a process for forming a barrier film from said layered polyethylene MDO film, to a laminate and to an article comprising the barrier film. The oxygen and vapor permeability of the barrier film are low so that the barrier film is particularly suited for packaging foodstuff or other oxygen sensitive products.

The invention relates to the technical field of waterproof coiled materials, in particular to a self-adhesive waterproof coiled material and a preparation method thereof. The waterproof roll comprises a polyethylene film, a main body layer, a self-adhesive layer and an isolating film from top to bottom, wherein the main body layer is obtained by extruding, granulating and melting matrix asphalt, butyl rubber, modified vermiculite, a borate compound, an antioxidant and sulfur, dip-coating gridding cloth on two sides, and calendaring and shaping; and the self-adhesive layer is obtained by melting and curing SEBS, hydrogenated petroleum resin, polyisobutene, modified vermiculite, a borate compound, a plasticizer and an antioxidant. Compared with the prior art, the prepared self-adhesive waterproof coiled material has better resistance to damp-heat aging and salt erosion, and is especially suitable for coastal, underground, high-humidity and other severe environments.

An assembly includes an acoustic device. The acoustic device can include a polyethylene membrane. The polyethylene membrane can have first direction and a second direction, the second direction being orthogonal to the first direction. The polyethylene membrane can have a surface area per volume of at least 39×106 / m. The polyethylene membrane can have a geometric mean tensile modulus of 250 to 750 MPa. The polyethylene membrane can have a maximum tensile modulus in the first direction of 440 to 915 MPa. The polyethylene membrane can have a maximum tensile modulus in the second direction of 275 to 515 MPa. The polyethylene membrane can be an expanded polyethylene membrane.

The invention relates to the technical field of polyethylene films, and particularly discloses a low-precipitation polyethylene film and a preparation method thereof. The low-precipitation polyethylene film is prepared from the following raw materials: polyethylene, silicon carbide nanowires, nano talcum powder, an antioxidant and glyceryl stearate. The alkane precipitation amount of the obtained polyethylene film is 5 ppm or below, and precipitation of alkane molecules of the polyethylene film is obviously reduced.

The utility model relates to a novel PE (Poly Ethylene) reticulated protective film, which comprises a polyethylene film layer and an adhesive layer coated on one side of the polyethylene film layer, the adhesive layer is of a reticulated structure, the polyethylene film layer is provided with arrayed small holes, the aperture of the small holes is 0.1-0.3 mm, and the distance between adjacent small holes is smaller than the distance between corresponding sides of a single reticulated hole of the adhesive layer. As the arrayed small holes are formed in the polyethylene film layer, and the distance between the adjacent small holes is smaller than the distance between the corresponding edges of the single reticulate pattern hole of the adhesive layer, each mesh hole formed by the reticulate pattern is provided with the small holes, the protective film is attached to the surface of a part workpiece during production, and then the part workpiece is put into a negative pressure box, so that the surface of the part workpiece is protected; under the action of negative pressure, residual small bubbles attached to a protective surface can be pumped away, so that a film is tightly attached to the protective surface, the purpose of film pasting can be achieved without excessive mechanical actions in the film pasting process, protective film pasting of easily-damaged products is achieved, the film pasting quality is good, the workpiece effect is high, and parts are not prone to being damaged.

The utility model relates to the technical field of veterinary diagnosis equipment, and discloses a forming device for producing a polyethylene film plastic bag, which comprises a device main body and a wind-up roller, the device main body is provided with a mounting rack, the mounting rack is provided with a rotating motor, an action output shaft of the rotating motor is provided with a rotating disc, and the rotating disc is provided with a wind-up roller. Four sliding rods are arranged on the rotating disc in the circumferential direction at intervals, mounting blocks are mounted on the sliding rods, mounting grooves are formed in the mounting blocks, a connecting shaft is arranged at one end of the winding roller in a protruding mode, the connecting shaft is clamped in the mounting grooves, and a hexagonal butt joint block is arranged at the other end of the winding roller in a protruding mode. When the winding device is used, the other winding roller on the rotating disc can be driven by the rotating motor to be in butt joint with the winding motor, and the limiting rod is pulled out to remove the connection and fixation between the limiting clamping block and the mounting block, so that the connecting shaft can be separated from the mounting block, and the purpose of detaching the winding roller from the device for replacement is achieved.

Disclosed are multilayer foam films containing high density polyethylene for direct food contact and non-direct food contact as well as aseptic packaging applications. In one embodiment, the bulk density of the film is less than 0.962 grams / cm 3 , wherein more than 50% of the pores in the foam layer are closed pores. In one embodiment, the foam film is thick (generally greater than 8 mils thick) and has a flexural stiffness value greater than 18 in the Taber stiffness unit configuration according to TAPPI / ANSI T 489om-15, and the ratio of the mass per unit area (the mass of the film per unit area in grams per square meter (g / m 2 )) to the stiffness value in the Taber unit configuration is equal to or less than 13. In one embodiment, the film has a very smooth surface with a smoothness value less than 25 in the Sheffield smoothness unit configuration according to TAPPI T 538. The water vapor transmission rate value of the described foam film according to ASTM E398-13 can be less than 1 g / m 2 / 24 hours. The oxygen transmission rate value of the described foam film according to ASTM D3985 can be less than 10 cc / m 2 / 24 hours.

This invention discloses a fire-retardant battery separator, its preparation method, and a fire-retardant battery, relating to the field of battery separator technology. In preparing the fire-retardant battery separator, this invention involves reacting a mixture of diglyceride borate and trimellitic anhydride chloride to obtain a flame-retardant monomer; polymerizing 4,4'-diaminodiphenyl ether and the flame-retardant monomer, followed by electrostatic spraying to obtain polyamic acid microspheres; dehydrating and drying the polyamic acid microspheres to obtain polyimide microspheres; etching and acidifying the polyimide microspheres to obtain carboxylated polyimide microspheres; grafting propylene-based phosphoric acid and acrylic acid copolymers onto the surface of a polyethylene film to obtain a modified polyethylene film; and coating the carboxylated polyimide microspheres onto the surface of the modified polyethylene film to obtain the fire-retardant battery separator. The fire-retardant battery separator prepared by this invention exhibits excellent flame retardancy, wetting, and thermal stability.

The utility model discloses a cold-resistant shock-resistant retort pouch which comprises a composite film, the composite film is matched together to form a pouch body, and the composite film comprises a PET (polyethylene terephthalate) film layer, a first asynchronous stretching double-sided corona nylon film layer, a second asynchronous stretching double-sided corona nylon film layer, a polyethylene lamination layer and a polyethylene film layer, the polyethylene film layer is arranged between the PET film layer and the polyethylene film layer, the first asynchronous stretching double-sided corona nylon film layer is arranged between the PET film layer and the polyethylene film layer, and the second asynchronous stretching double-sided corona nylon film layer is arranged between the polyethylene film layer and the polyethylene film layer. The composite film is formed by compounding the PET film layer, the first asynchronous stretching double-sided corona nylon film layer, the second asynchronous stretching double-sided corona nylon film layer, the polyethylene spraying film layer and the polyethylene film layer, and after the composite film is prepared into the retort pouch, the whole retort pouch still has good sealing performance and good impact resistance at low temperature.

The present invention relates to a multilayer polyethylene film comprising in order at least an outer layer, a core layer and a sealing layer, wherein the sealing layer comprises: i) at least 30.0 wt% of a first multimodal linear low density polyethylene terpolymer relative to the total weight of the sealing layer; and ii) at least 10.0 wt% of a first plastomeric body having a density of 910 kg / m3or less (ISO 1183) relative to the total weight of the sealing layer; wherein the core layer comprises: a) at least 8.0 wt% of a second plastomeric body having a density of 910 kg / m3or less (ISO 1183) relative to the total weight of the core layer, or b) at least 8.0 wt% of a multimodal linear low density polyethylene (LLDPE) binary copolymer relative to the total weight of the sealing layer; and c) a second multimodal polyethylene terpolymer. 3 The present invention relates to a multilayer polyethylene film comprising in order at least an outer layer, a core layer and a sealing layer, wherein the sealing layer comprises: i) at least 30.0 wt% of a first multimodal linear low density polyethylene terpolymer relative to the total weight of the sealing layer; and ii) at least 10.0 wt% of a first plastomeric body having a density of 910 kg / m3or less (ISO 1183) relative to the total weight of the sealing layer; wherein the core layer comprises: a) at least 8.0 wt% of a second plastomeric body having a density of 910 kg / m3or less (ISO 1183) relative to the total weight of the core layer, or b) at least 8.0 wt% of a multimodal linear low density polyethylene (LLDPE) binary copolymer relative to the total weight of the sealing layer; and c) a second multimodal polyethylene terpolymer. 3 ​

The utility model discloses a heat preservation type heating and ventilation pipeline for heating and ventilation engineering, which comprises an inner conveying pipe, a composite heat preservation layer, a vapor barrier layer and an outer protective sleeve which are sequentially and fixedly arranged from inside to outside, the composite heat preservation layer is formed by alternately laminating aerogel felt layers and closed-cell foaming rubber layers, and a connecting flange is fixedly arranged at the end part of the pipeline. Compared with the prior art, the composite heat preservation layer has the advantages that the composite heat preservation layer is formed by alternately stacking the aerogel felt layers and the closed-cell foaming rubber layers, heat loss in the heat energy conveying process is greatly reduced, and the energy utilization efficiency is improved; the vapor barrier layer is of a double-sided barrier structure formed by hot-pressing and compounding an aluminum foil layer and a polyethylene film, water vapor invasion is effectively prevented, the heat preservation layer is prevented from being affected with damp, the outer protective sleeve is provided with a rapid detection opening and a temperature and humidity sensor is arranged in the outer protective sleeve, real-time monitoring of the temperature, humidity and other states in the pipeline is achieved, and potential problems can be found and handled in time.

The invention relates to a nickel-based alloy welding material for a garbage incinerator and a production process of the nickel-based alloy welding material, and belongs to the technical field of welding materials, the nickel-based alloy welding material comprises a central stranded welding wire, the periphery of the central stranded welding wire is sleeved with a fastening net, the periphery of the fastening net is wrapped with a polyethylene film, the periphery of the polyethylene film is provided with outer-layer stranded welding wires, and the periphery of the outer-layer stranded welding wires is provided with inner-layer stranded welding wires. A combustion improver is arranged in a hole formed between the polyethylene film and the central stranded welding wire, after the first peripheral wire is stranded on the central welding wire, the first peripheral wire is pressed, so that the first peripheral wire enables the peripheral wall of the central welding wire to be sunken to form a groove, and therefore, through the cooperation between the first peripheral wire and the groove, the combustion improver is improved, and the welding quality is improved. The first peripheral wire and the central welding wire are positioned through the clamping hoop, the second peripheral wire is positioned through the abutting of the first peripheral wire and the second peripheral wire, and the radial positioning of the peripheral welding wires is realized through the clamping hoop, so that the arrangement of a central welding wire guide strip is avoided, and the production difficulty and the production cost are reduced.

The application discloses a polyethylene film material suitable for high-speed gravure printing and a preparation method. The polyethylene film material is prepared from polyethylene with a density of 0.92-0.97 g / cm3 as raw material by adopting a 'five-layer co-extrusion blow molding+online longitudinal stretching' process, through step density layer design, the thickness ratio between layers is 1:1:2:1:1, and the polyethylene film material with a thickness of 20-25 mu is prepared through online twelve-roll longitudinal stretching. The polyethylene film material prepared by the application has high tensile strength (longitudinal), good elongation at break, and a 1% quadratic modulus (longitudinal) of 1356 MPa, and has good material rigidity. The polyethylene film material can meet the printing speed of 300-500 m / min in an ester-soluble ink system of a high-speed gravure printing machine, and the overlay precision is less than or equal to 0.2 mm. The polyethylene film material can provide technical guidance for the realization of polyethylene single material packaging.

The present invention discloses a comfortable medical nursing pad with a multi-layer structure and its preparation process, which relates to the field of sanitary products. The nursing pad includes: a top layer, where the top layer is a skin-friendly layer made of non-woven fabric material; a composite core layer, where the composite core layer is a conforming water absorption and diffusion layer, including a support structure of three-dimensional porous material, a cellulose gel structure embedded on the three-dimensional porous material, and a fluff pulp fiber structure mixed in the three-dimensional porous material; a bottom layer, where the bottom layer is an anti-permeation and breathable layer made of polyethylene film material. By using the three-dimensional porous material as the support structure of the composite core layer and embedding the cellulose gel structure, it can quickly absorb and retain a large amount of liquid, form a gel-like substance, effectively lock the liquid to prevent backflow, and at the same time mix the fluff pulp fiber structure, which can achieve a dynamic balance of liquid absorption, diffusion and storage, thereby improving the overall absorption efficiency and comfort.

The utility model belongs to the technical field of building structures, and particularly provides a clean board with a hot melt film, which comprises a rock wool core board, panels are respectively attached to two side surfaces of the rock wool core board perpendicular to the thickness direction of the rock wool core board, the thickness of each panel is 0.4 mm-0. 6mm, keels are respectively arranged on four side surfaces of the rock wool core board parallel to the thickness direction of the rock wool core board, and the hot melt film is arranged on the keels. The thickness of the keel ranges from 0.55 mm to 0.65 mm. The surface, away from the rock wool core plate, of the face plate is coated with a polyethylene coating or a polyvinylidene fluoride coating with the thickness ranging from 18 micrometers to 22 micrometers, a hot melt adhesive film with the thickness ranging from 28 micrometers to 32 micrometers is arranged between the face plate and the rock wool core plate, and the hot melt adhesive film is a modified polyethylene film or an EVA adhesive film.

The invention discloses a high-barrier-property medicinal packaging composite membrane material and a preparation method thereof, and relates to the technical field of medicine packaging. The medicinal packaging composite film material comprises a biaxially oriented polypropylene film layer, an aluminized polyester film layer and casting polyethylene from outside to inside, the film layers are photo-cured through an adhesive; wherein the aluminized polyester film layer is obtained by mixing polyethylene glycol terephthalate and block polyester containing 2, 5-furandicarboxylic acid, performing melt extrusion, performing longitudinal stretching after casting, coating acrylic emulsion, performing transverse stretching to obtain a polyester base film, and performing vacuum aluminizing; the biaxially oriented polypropylene film layer is subjected to corona treatment and then coated with a polymer solution containing montmorillonite for modification; the composite membrane material prepared by the invention has excellent barrier property in an oxygen and water vapor permeation test.

The invention relates to a functional high-strength polyethylene film material continuous forming method which comprises the following steps: S1, mixing a photosensitizer and a grafting monomer to prepare a turbid liquid, spraying the turbid liquid into polyethylene, and stirring and dispersing to obtain a composite material; s2, adding the composite material in the S1 into a screw extruder for extrusion to obtain a thick film material, and then performing continuous isobaric pressing to obtain a thin film material; and S3, carrying out multi-time hot drafting on the thin film material in the S2 to obtain a film material product, carrying out ultraviolet radiation in an inert atmosphere, and rolling to obtain the functionalized high-strength polyethylene film material. Compared with the prior art, continuous forming of the high-strength UHMWPE film material can be achieved at low temperature, the preparation process does not need a solvent and is environmentally friendly, the surface of a product has polarity, and the interface bonding force is high when the composite material product is manufactured.

The invention relates to the technical field of polyethylene films, and particularly discloses an anti-ultraviolet polyethylene film for a shower curtain and a preparation method of the anti-ultraviolet polyethylene film. The anti-ultraviolet polyethylene film for the shower curtain is prepared from the following raw materials: PE resin, POE, bamboo fiber powder, polyamide fiber and an anti-ultraviolet additive. The polyethylene film obtained by the invention has the advantages that the anti-ultraviolet shielding rate is up to 97%, the anti-ultraviolet shielding rate of the polyethylene film is improved, the retention rate of tensile strength after aging is up to 99.4%, the durability reaches 7 years or more, and the polyethylene film is durable. And moreover, the transverse elongation, the longitudinal elongation, the transverse tensile force and the longitudinal tensile force of the obtained polyethylene film can reach 850%, 652.9%, 35.5 N and 36.1 N respectively, and the polyethylene film has relatively high strength and toughness.

The present invention aims to provide a polyethylene film in which heat-induced curl is more suppressed. The present invention provides a biaxially oriented polyethylene film comprising polyethylene resin, wherein (a) a heat shrinkage ratio (MDHS / TDHS) of heat shrinkage in a longitudinal direction (MDHS) measured at 100°C according to JIS Z 1712 (2009) to heat shrinkage in a width direction (TDHS) measured at 100°C according to JIS Z 1712 (2009) is 0.35 or more and 2.50 or less, and / or (b) a planar orientation coefficient ΔP is 0.006 or more and 0.035 or less as calculated from refractive indices in a width direction (Ny), a longitudinal direction (Nx), and a thickness direction (Nz) measured according to JIS K 7142 (2014), using the following formula: planar orientation coefficient ΔP = (Nx + Ny) / 2 - Nz.