1010 results about "Thermoplastic polyurethane" patented technology

The invention relates to the technical field of refrigeration material preparation, in particular to an efficient passive radiation refrigeration material suitable for a sub-super environment and a preparation method and application of the efficient passive radiation refrigeration material. The method comprises the following steps: uniformly mixing thermoplastic polyurethane, sunlight high-reflection inorganic particles and a phase change material in a solvent; after a chemical foaming agent is added, the obtained suspension liquid is heated and foamed in a confinement mold, and wet gel is formed; and finally, carrying out freeze drying treatment to obtain the composite porous aerogel. The prepared material has a micro-nano porous skeleton formed by TPU, and inorganic particles and PCM are uniformly dispersed in the skeleton wall. Through component cooperation and a special porous structure, the material has extremely high sunlight reflectivity and mid-infrared emissivity, self-adaptive temperature regulation and control are achieved through PCM phase change, the problem that refrigeration of a traditional material fails in the sub-environment such as the vertical surface is effectively solved, and efficient sub-super-environment heat management is achieved.

A toy ball includes an clastic shell that defines a receiving cavity and an actuation module mounted in the cavity. The actuation module is detachably connected to the clastic shell and provides driving force to roll and / or enhance bouncing. The clastic shell includes expanded thermoplastic polyurethane (E-TPU) to provide low weight, high rebound, and compressive resistance.

The invention discloses an ultra-flexible stretchable dimming film and a preparation method thereof, and relates to the technical field of dimming films, and the ultra-flexible stretchable dimming film comprises an upper transparent electrode layer, a dimming function layer and a lower transparent electrode layer which are sequentially stacked from top to bottom; the preparation method comprises the following steps: 1) preparing a main matrix material / ultraviolet curing resin mixture; 2) assembling the dimming film; and 3) ultraviolet light curing. According to the invention, through surface phosphonic acid functionalization treatment, covalent bond anchoring of cerium oxide nanoparticles is realized on a thermoplastic polyurethane fiber network; by constructing a full-thermoplastic polyurethane material system, the breakthrough of interfacial compatibility between a fiber reinforced phase and a polymer matrix is realized, so that the film has high tensile strain capacity and excellent fatigue resistance on the premise of keeping high transparency.

The invention discloses a polyester film for a blue adhesive tape, which is used for binding and packaging a battery of a new energy electric vehicle. The polyester film is prepared from 70-85 parts by weight of high-viscosity polyethylene glycol terephthalate, 5-12 parts by weight of thermoplastic polyurethane, 2-4 parts by weight of siloxane resin powder, 1-3 parts by weight of melamine cyanurate, 2-5 parts by weight of organic modified montmorillonite, 1-3 parts by weight of a coupling agent and 1-3 parts by weight of a coupling agent. 1-3 parts by weight of aromatic polyimide micro powder and 0.3-0.5 part by weight of ethylene glycol monostearate. The invention also discloses a preparation method of the polyester film. The polyester film for the blue adhesive tape is excellent in dielectric strength, flexibility, puncture resistance and flame retardance, the characteristics directly correspond to strict requirements of automobile lithium battery shell packaging, and comprehensive guarantee is provided for safety, reliability and environmental adaptability.

The utility model discloses a high-performance high-temperature-resistant oil-stain-resistant anti-interference medium-voltage power cable, and the power cable comprises a cable core which is formed by twisting a plurality of insulated shielding wire cores. A gap of the cable core is filled with thermoplastic polyurethane elastomer rubber; the cable core is wrapped by a superconducting silicon carbide fiber tape shielding wrapping layer, and the superconducting silicon carbide fiber tape shielding wrapping layer is wrapped by an LCP high-molecular liquid crystal polymer high-temperature-resistant fireproof layer in an extruded mode. A graphene aerogel layer is extruded outside the LCP macromolecular liquid crystal polymer high-temperature-resistant fireproof layer, a polysulfonamide fiber braid layer is lapped outside the graphene aerogel layer, a polyphenylene sulfide fiber tape is coated outside the polysulfonamide fiber braid layer through a semi-conductive adhesive, an armor layer is arranged outside the polyphenylene sulfide fiber tape, and the armor layer is wrapped outside the LCP macromolecular liquid crystal polymer high-temperature-resistant fireproof layer. And a hydrogenated butadiene-acrylonitrile rubber outer sheath is extruded outside the armor layer. According to the utility model, normal operation of a line can be ensured in a complex and severe environment for a long time, and the service life of the cable is greatly prolonged.

The invention relates to a phase change energy storage fiber with ultraviolet shielding and heat regulation and control functions and a preparation method of the phase change energy storage fiber. The preparation method comprises the following steps: dissolving thermoplastic polyurethane in N, N-dimethylformamide to form a spinning mother solution; the preparation method comprises the following steps: firstly, adding nano titanium dioxide and uniformly dispersing, then adding a silicon dioxide shell layer-octadecane core layer phase change microcapsule, and stirring and ultrasonically defoaming to obtain a uniform composite spinning solution; extruding the spinning solution into a coagulating bath consisting of isopropanol and deionized water through an injection pump, and coagulating and forming to obtain nascent fibers; finally, washing, solvent replacement, tension setting and drying treatment are conducted, and compared with the prior art, the obtained fiber has efficient ultraviolet shielding performance and remarkable phase change energy storage capacity and has wide application prospects in the fields of intelligent temperature adjusting textiles, outdoor protective garments, building heat management and the like.

The invention belongs to the field of functional composite fabrics, and provides a mosquito-repellent thermoplastic polyurethane composite fabric and a preparation method thereof.According to the mosquito-repellent thermoplastic polyurethane composite fabric and the preparation method thereof, the design that mosquito-repellent microcapsules of a core-shell structure are dispersed in a thermoplastic polyurethane hot melt adhesive layer is adopted, a microcapsule core layer comprises mosquito-repellent active ingredients such as icaridin, deet or dimethyl phthalate, and the mosquito-repellent active ingredients are dispersed in a thermoplastic polyurethane hot melt adhesive layer; the shell layer is made of a polyurea material and is prepared through an interfacial polymerization method, high-load stable dispersion and controllable dot matrix film forming of the microcapsule in a hot melt adhesive system are achieved, the content of the microcapsule can reach 0.5-15 wt%, the particle size is controlled to be 0.1-2.0 m, the drug loading capacity reaches 10-60 wt%, the problem that the mosquito-repelling microcapsule is prone to damage and failure in the high-temperature melting mixing and hot-pressing compounding process is solved, and the mosquito-repelling microcapsule has good application prospects. The prepared composite fabric is high in mosquito repelling rate, still keeps an effective mosquito repelling function after being washed for multiple times, and has a wide application value.

The invention discloses a thermoplastic wave-absorbing material as well as a preparation method and application thereof. The thermoplastic wave-absorbing material comprises a silane coupling agent modified absorbent and thermoplastic polyurethane, wherein the thermoplastic polyurethane is prepared from the following raw materials in parts by mass: 100 parts of a polyurethane matrix, 2 to 4 parts of an anti-hydrolysis agent, 2 to 4 parts of an antioxidant, 0.1 to 0.5 part of a mildew preventive and 2 to 10 parts of a plasticizer. The thermoplastic wave-absorbing material disclosed by the invention has good wave-absorbing performance in a range of 1-18GHz, has temperature resistance, flexibility, mechanical strength and environmental adaptability which are equivalent to those of a thermosetting material, and has a wide application prospect. According to the preparation method, extrusion molding is adopted, continuous production can be achieved, use of solvents is reduced, the method is more environmentally friendly, the material can be recycled after being damaged, and therefore the material cost is effectively reduced.

The invention relates to the technical field of sealing strips, and provides a tensile rubber sealing strip for an automobile and a preparation method of the tensile rubber sealing strip. The rubber sealing strip is prepared from, by weight, 65-75 parts of ethylene propylene diene monomer, 25-35 parts of chloroprene rubber master batch, 30-40 parts of thermoplastic polyurethane elastomer, 30-40 parts of filler, 1-2 parts of vulcanizing agent, 8-12 parts of vulcanization accelerator, 3-5 parts of plasticizer, 3-5 parts of anti-aging agent, 1-2 parts of stearic acid and 2-4 parts of zinc oxide, and the chloroprene rubber master batch is prepared from chloroprene rubber and 4-N-carbobenzoxy amino cyclohexanone. By means of the technical scheme, the problem that in the prior art, the rubber sealing strip is insufficient in tensile property is solved.

The invention relates to the field of graphene sensors, and particularly discloses a preparation method of a sweat-erosion-resistant laser-induced graphene sensor, which comprises the following steps: firstly, locally heating laser-induced graphene coated with heat release glue by using 1064 nm laser, so that the laser-induced graphene is stripped from an original polyimide substrate and transferred to a target thermoplastic polyurethane flexible substrate; then using 355 nm laser to ionize mixed gas of inert gas and oxygen, generating plasma to bombard an interface of laser-induced graphene and polyurethane, and inducing covalent bonding between surface functional groups; and then spraying a polydimethylsiloxane-urea / silicon dioxide fluoride composite solution on the surface of the laser-induced graphene-polyurethane composite structure subjected to transfer printing and bonding, and sintering by adopting 532 nm laser to form the self-repairing super-hydrophobic packaging layer with a micro-nano mastoid structure. The problem of ion intercalation in sweat is solved, and the electrical stability, the interface bonding strength and the wear resistance of the sensor are remarkably improved.

The invention provides an ultrathin temperature-sensitive hydrogel flexible electrode and a preparation method thereof, and belongs to the technical field of hydrogel electrodes. The preparation method comprises the following steps: mixing monomer acryloyl glycinamide and acrylic acid, and dissolving in deionized water to obtain a mixed solution A; adding a chemical cross-linking agent and a poly (3, 4-ethylenedioxythiophene)-poly (styrene sulfonate) solution into the mixed solution A to obtain a mixed solution B; adding sodium sulfate and tannic acid into the mixed solution B to obtain a prepolymerization solution; adding an initiator into the pre-polymerized solution to obtain a polymerized solution; the preparation method comprises the following steps: adding thermoplastic polyurethane particles into a mixed solution of N, N-dimethylformamide and tetrahydrofuran to form a precursor solution, and carrying out electrostatic spinning on the precursor solution to obtain a film matrix; and coating the polymerization solution on the surface of a thin film substrate, and packaging a conductive copper foil to obtain the ultrathin temperature-sensitive hydrogel flexible electrode. The mechanical property and the adhesion property of the flexible electrode are improved, and the adhesion strength can be dynamically adjusted by regulating and controlling the temperature.

The invention relates to the technical field of high polymer materials, and particularly discloses a high-flame-retardant high-strength low-smoke thermoplastic polyurethane wire and cable sheath material and a preparation method thereof. The high-flame-retardant, high-strength and low-smoke thermoplastic polyurethane wire and cable sheath material comprises the following components in parts by weight: 50-80 parts of thermoplastic polyurethane; 5-20 parts of a flame retardant A; 5-20 parts of a flame retardant B; 3-8 parts of a smoke suppressant; 3-8 parts of a fiber material; 0.1 to 1 part of an antioxidant; and 0.5-2 parts of a processing aid. The invention provides the high-flame-retardant, high-strength and low-smoke thermoplastic polyurethane wire and cable sheath material with a brand new composition system, and compared with the existing material, the high-flame-retardant, high-strength and low-smoke thermoplastic polyurethane wire and cable sheath material provided by the invention has relatively high mechanical strength and also has the properties of high flame retardance, low smoke and the like; wide application prospects are realized.

The invention provides thermoplastic polyurethane for a waterproof and moisture-permeable film and a preparation method and application thereof.The thermoplastic polyurethane for the waterproof and moisture-permeable film is obtained through a reaction of polymer polyol, isocyanate, a chain extender and small molecule ester, the polymer polyol is polyethylene glycol or a combination of polyethylene glycol and polyester polyol, and the isocyanate is a mixture of isocyanate, a chain extender and small molecule ester. The small molecule ester comprises aliphatic small molecule ester and / or alicyclic small molecule ester; the specific polymer polyol is selected, and the small molecule ester is added in the reaction process, so that the mechanical property and heat resistance of the thermoplastic polyurethane can be further effectively improved on the premise of ensuring that the obtained thermoplastic polyurethane has excellent waterproof and moisture permeable effects; the thermoplastic polyurethane for the waterproof and moisture-permeable film has excellent mechanical properties, heat resistance and waterproof and moisture-permeable properties, and can meet the use requirements of high-performance outdoor clothes.

The invention relates to the technical field of fabric fabrics, in particular to preparation of a stain-resistant and waterproof polyester composite fabric. The invention discloses a stain-resistant waterproof polyester composite fabric and a preparation method thereof, the composite fabric is composed of three layers from outside to inside, the first layer is a polyester filament yarn surface layer subjected to fluorinated graphene and plant source C18 alkylsilane amphiphobic finishing; the second layer is a copolyamide hot melt adhesive net film with a melting point of 105 DEG C; and the third layer is a degradable multifunctional thermoplastic polyurethane elastomer film loaded with silver zeolite antibacterial microcapsules and conductive carbon nanotubes. An amphiphobic finishing liquid is uniformly deposited on the surface of polyester by adopting a supercritical CO2 one-step method, and nanoparticles and fibers are covalently bonded through a chitosan-citric acid cross-linked network, so that the waterproof grade is still greater than or equal to 90 after 30 times of water washing, the oil repellent grade is greater than or equal to 5, and the water contact angle and the oil contact angle are reduced by lt; the temperature is 5.5 DEG C, and the moisture permeability retention rate is gt; the antibacterial rate is 97%, and the antibacterial rate is gt; the compost degradation rate within 180 days is gt; 90%.

The invention relates to a carbon nano reinforced thermoplastic polyurethane composite material as well as a preparation method and application thereof. The composite material is prepared from the following components in parts by mass: 5 to 20 parts of diisocyanate, 10 to 30 parts of oligomer dihydric alcohol, 1 to 10 parts of bifunctional chain extender and 1 to 20 parts of filler, the filler is prepared from the following components in parts by mass: 0.95 to 18 parts of inorganic filler and 0.05 to 2 parts of carbon-based nano filler; preparing a carbon-based nanofiller of flaky carbon nanofibers, tubular carbon nanofibers or fishbone-shaped carbon nanofibers from reaction gas by using a metal catalyst through a chemical vapor deposition method; the metal catalyst is selected from an iron-nickel catalyst or a nickel-copper catalyst, the reaction gas comprises a carbon source gas and a reducing gas, the carbon source gas is selected from carbon monoxide or ethylene, and the reducing gas adopts hydrogen. Compared with the prior art, the material has good mechanical properties and damping performance, especially has excellent normal-temperature damping performance and damping temperature range, and is suitable for 3D printing.

The application relates to the technical field of power cables, and discloses a coal mine-used cross-linked polyethylene insulated power cable and a preparation method thereof. The coal mine-used cross-linked polyethylene insulated power cable comprises, from inside to outside, a cable core, an inner lining layer, an armoring layer and an outer sheath layer. The cable core comprises, from inside to outside, a conductor, a conductor shielding layer, a cross-linked polyethylene insulation layer and an insulation shielding layer. The outer sheath layer comprises the following components in parts by weight: 55-70 parts of polyvinyl chloride, 15-30 parts of thermoplastic polyurethane, 12-18 parts of a plasticizer, 0.3-0.5 parts of an antioxidant, 0.8-1.6 parts of a lubricant, 15-20 parts of a filler, 1-3 parts of maleic anhydride grafted polyethylene and 0.5-1.0 parts of a coupling agent. The filler comprises perlite loaded yttrium and tin composite oxides. The above technical scheme solves the problem of insufficient flame retardance of the coal mine-used cross-linked polyethylene insulated power cable in the prior art.

The invention belongs to the technical field of conductive hydrogel composite materials, and relates to nanofiber reinforced composite organic hydrogel as well as a preparation method and application thereof.The method comprises the following preparation steps: synthesizing a thermoplastic polyurethane (TPU) nanofiber membrane in advance, uniformly filling a TPU stretchable matrix with carbon nanotubes (CNTs) in a solvent by adopting ultrasonic assistance, and preparing the nanofiber reinforced composite organic hydrogel. A conductive network is adjusted by adjusting the loading capacity of carbon nanotubes on a fiber membrane through different ultrasonic time, and the upper layer and the lower layer of the modified fiber membrane are coated with a polyvinyl alcohol / glycerol / aqueous solution to prepare a conductive CNTs (at) TPU-X nanofiber membrane (x is ultrasonic time), so that the elastomer film sensor with a sandwich-like structure is obtained. According to the invention, the problems of dispersibility of the nanofiller in a hydrogel matrix and interfacial compatibility of fibers and gel are solved.

The invention belongs to the technical field of flexible electronics, and relates to a flexible piezoresistive sensor based on an MXene multilevel heterostructure and a preparation method of the flexible piezoresistive sensor. The method comprises the steps that MXene nanosheets are attached to the surface of a thermoplastic polyurethane nanofiber substrate through electrostatic self-adsorption, a nanofiber composite layer is obtained, UIO-66-NH2 is dispersed in the thermoplastic polyurethane nanofiber substrate, and the surface of the thermoplastic polyurethane nanofiber substrate is modified with a first chitosan modification layer; the MXene nanosheets are embedded into the three-dimensional network of the polyurethane foam skeleton through dipping and extruding operation, a porous foam composite layer is obtained, and the surface of the polyurethane foam skeleton is modified with a second chitosan modification layer; and combining the nanofiber composite layer and the porous foam composite layer through a conductive adhesive containing silver paste, and carrying out packaging treatment to form the MXene multistage heterostructure with tightly combined interfaces. Based on the method, through the synergistic effect of the multistage heterostructures, high sensitivity, wide pressure detection range and high stability are realized at the same time.

The invention is directed to a thermoplastic polyurethane composition comprising polystyrene and a phosphorus containing flame retardant.

The utility model discloses a stomatological moisture-proof former, which belongs to the technical field of medical instruments and comprises a first dental arch plate, a second dental arch plate is mounted on the outer side of the first dental arch plate, and both the first dental arch plate and the second dental arch plate are formed by compression molding of medical transparent thermoplastic polyurethane materials. Positioning assemblies used for assisting in fixing the two dental arch plates are installed at the two ends of the outer sides of the first dental arch plate and the second dental arch plate, a fixing block is fixedly connected to the rear side of the middle of the outer wall of the second dental arch plate, a threaded rod is rotationally connected to the middle of the outer wall of the first dental arch plate, and the tail end of the threaded rod is in threaded connection to the inner wall of the fixing block; the distance between the first dental arch plate and the second dental arch plate can be adjusted by driving the fixed block to move through the threaded rod, and meanwhile, the two dental arch plates and the moisture insulation pad can be stably fixed on the two sides of teeth by matching with the positioning assembly, so that the moisture insulation and forming effects on a tooth area are improved.

A composition for a vehicle wheel element, and a molded body and wheel balance weight utilizing the same, wherein a composition for a vehicle wheel element and a product utilizing it are provided. The composition comprises 100 parts by weight of thermoplastic polyurethane, 1 to 30 parts by weight of a plasticizer, and 400 to 1680 parts by weight of metal particles. The composition has a density of 3 g / cm³ or more. The thermoplastic polyurethane has a Shore A hardness of 59 to 92.

The utility model relates to the field of sports shoes, in particular to a sole capable of preventing ankle sprain during sports, which comprises a sole body and a TPU (thermoplastic polyurethane) supporting cup, the sole body comprises an outsole, a midsole and an insole, the rear two-thirds of the top of the sole body is fixedly connected with the bottom of the TPU supporting cup, and the TPU supporting cup plays a role in stabilizing and protecting two-thirds of a heel. The middle part of the midsole is provided with a buffer layer, a plurality of air bags are uniformly distributed in the buffer layer, a cushioning protection effect is achieved in the running and jumping process, the sole is naturally stretched through the natural foot shape toe cap space design, the strength can be fully released in the exercise process, and the ankle sprain is prevented; the rubber block is embedded in the bottom of the sole body, and the anti-skid lines are uniformly distributed at the bottom of the rubber block, so that the anti-skid, wear-resistant and damp-proof effects are achieved, the service life of the sole is prolonged, and the practicability of the sole is improved.

A thermoplastic polyurethane resin elastomer is obtained by reacting an isocyanate compound (I), an aliphatic alcohol (II) having a number average molecular weight determined from the hydroxyl value of less than 300 and having only a hydroxyl group as a functional group, and a polyol (III) having a number average molecular weight determined from the hydroxyl value of not less than 300 and not more than 10,000. The isocyanate compound (I) includes not less than 90 mol % in total of an aliphatic isocyanate compound containing two isocyanate groups and / or an alicyclic isocyanate compound containing two isocyanate groups. The aliphatic alcohol (II) includes not less than 90 mol % of a C12 or lower aliphatic diol. The polyol (III) includes not less than 80 mol % of a copolymerized polycarbonate diol (IIIA) including a linear repeating structural unit represented by formula (A) and a repeating structural unit represented by formula (B).

To provide a composition and a molded article having excellent adhesion to a curved surface of a vehicle wheel and moldability. In addition, the present invention has been made in an effort to provide a composition capable of implementing excellent durability and a low wheel balancing error rate by having fatigue resistance against repeated bending that may occur during a product manufacturing process or a balancing operation.SOLUTION: According to an aspect of the present invention, there is provided a composition for a wheel member for vehicles, the composition including 1 to 30 parts by weight of a plasticizer and 400 to 1680 parts by weight of metallic particles, based on 100 parts by weight of TPU, wherein the TPU has a 3g / cm3 hardness of 59 to 92.SELECTED DRAWING: Figure 1

The invention discloses hot-pressed traceless high-elastic synthetic leather and a preparation method and application thereof, and belongs to the technical field of synthetic leather. The hot-pressed traceless high-elastic synthetic leather comprises a surface layer, a high-elastic foaming middle layer and a base cloth layer; the surface layer is a microporous elastic film layer formed by blending and drying waterborne polyurethane, a thermoplastic polyurethane elastomer and matting powder; the high-elastic foaming middle layer is a three-dimensional net structure layer formed by hot-pressing foaming, and the high-elastic foaming middle layer is prepared from the following raw materials in parts by weight: 100 parts of high-molecular-weight aromatic thermoplastic polyurethane elastomer particles; 3-8 parts of a foaming agent; 0.5 to 2 parts of a foaming aid; 5 to 15 parts of elastomer; the foaming ratio of the high-elastic foaming middle layer is 1.5-4 times of the original thickness, and the bonding interface of the high-elastic foaming middle layer and the base cloth layer is of a random three-dimensional interpenetrating structure; the base cloth layer is a high-elasticity warp-weft knitted fabric with warp-wise and weft-wise elastic recovery rates greater than 85%; the invention discloses synthetic leather which is traceless in hot pressing, high in elasticity and firm in interlayer combination.

The invention provides a polymer floor and a preparation method thereof. The floor sequentially comprises a first outer layer, a first buffer layer, a first bonding layer, a base material layer, a second bonding layer, a second buffer layer and a second outer layer from top to bottom, wherein the base material layer is made of a first polymer, and the first polymer is selected from one or a mixture of more of PVC (polyvinyl chloride), PET (polyethylene glycol terephthalate), PETG (polyethylene glycol terephthalate) and TPU (thermoplastic polyurethane); wherein the first buffer layer and the second buffer layer are respectively and independently selected from one or more of non-woven fabrics and glass fiber mats; wherein the first bonding layer and the second bonding layer are blended membranes of grafted resin and a second polymer, and the second polymer is selected from one or a mixture of more of TPU (thermoplastic polyurethane), EAA (ethylene-acrylic acid copolymer) and PETG (polyethylene terephthalate glycol); wherein the first outer layer and the second outer layer are impregnated with glue.

This invention discloses a method for preparing a three-dimensional integrated lumbar support cushion. The raw materials of the lumbar support cushion include: ethylene-vinyl acetate copolymer, polyether-type thermoplastic polyurethane elastomer, physically foamed microspheres, azodicarbonamide, caprolactam-blocked 4,4'-diphenylmethane diisocyanate, surface-modified copper nanowires, and silver-loaded silicone composite components. The preparation process is as follows: the matrix resin and modified copper nanowires are melt-blended at high temperature, and then mixed with the foaming system, crosslinking agent, and composite components at low temperature to obtain a blended base material; the blended base material is injection molded, followed by static differential temperature field for pressure holding and curing, and finally cooled and demolded. This invention utilizes copper nanowires to construct a thermally conductive network, which, combined with the external temperature difference, forms a continuous foaming ratio and crosslinking density gradient inside, eliminating the physical phase interface of traditional multi-material splicing, significantly improving the tear resistance and fatigue life of the transition zone; and utilizes cooling phase separation to form an anti-slip and antibacterial skin layer.

Multilayer surface protection films and methods for making and using such films are provided. The surface protection films have first and second thermoplastic polyurethane (TPU) layers and an intermediate ethylene vinyl acetate (EVA) layer disposed between the first and second TPU layers. The use of the first and second TPU layers as outer layers contributes to the optical clarity of the film. These TPU layers may have different thicknesses. The use of EVA as a component of the film layers provides a film with lower cost compared to traditional single-layer TPU films. When used as a surface coating for a wide range of applications, such as automobiles, wind turbine blades, home appliances, electronic displays, and mobile devices, the EVA component properties and the total EVA ratio of the film can be used to improve the physical properties of the multilayer structure while maintaining comparable or superior performance to these films.

A spike structure for the outsole of a sport shoe comprising a sole protruding portion 30 made of polypropylene (PP), an interface component 40 and a cleat member 50 made of thermoplastic polyurethane

Hydrocolloid-based wound dressings and backing layers thereof are described. The backing layer may include a carrier film prepared from a carrier film composition. The carrier film composition may include a surface active agent and a combination of first and second aromatic polyester-based thermoplastic polyurethanes. The combination of the first and second aromatic polyester-based thermoplastic polyurethanes may provide a wrinkle-free carrier film under accelerated aging conditions. The hydrocolloid-based wound dressing may include an adhesive layer and the backing layer disposed on the adhesive layer. Methods for preparing the backing layer may include contacting the first aromatic polyester-based thermoplastic polyurethane, the second aromatic polyester-based thermoplastic polyurethane, and the surface active agent with one another to prepare a mixture. The method may also include melting and homogenizing the mixture in an extruder, and extrusion casting the melted mixture on the carrier substrate to prepare the backing layer.