WO2021073071A1 - 一种超高分子量聚乙烯复合膜的制备方法及应用 - Google Patents

一种超高分子量聚乙烯复合膜的制备方法及应用 Download PDF

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WO2021073071A1
WO2021073071A1 PCT/CN2020/088989 CN2020088989W WO2021073071A1 WO 2021073071 A1 WO2021073071 A1 WO 2021073071A1 CN 2020088989 W CN2020088989 W CN 2020088989W WO 2021073071 A1 WO2021073071 A1 WO 2021073071A1
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molecular weight
weight polyethylene
high molecular
ultra
composite film
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PCT/CN2020/088989
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English (en)
French (fr)
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王庆昭
刘鹏
王志明
高龙洋
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青岛正爱科技有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C08K3/042—Graphene or derivatives, e.g. graphene oxides

Definitions

  • the invention relates to a preparation method of a wind power blade protective film, in particular to a preparation method and application of an ultra-high molecular weight polyethylene composite film for protecting wind power blades.
  • Wind turbine blades are one of the core components of wind turbines. Its good design, reliable quality and superior performance are the decisive factors to ensure the normal and stable operation of wind turbines.
  • the tip linear velocity of wind power blades can reach 80m/s during operation. At such a high speed, wind power blades, especially the leading edge of the blades, will suffer erosion from wind sand, salt spray, and raindrops in the air, which will reduce the aerodynamic performance of the blades, thereby affecting the efficiency of power generation.
  • paint protection is the most widely used in the protection of wind power blades.
  • the coating performance index strong adhesion, certain flexibility, strong wear resistance and impact resistance, weather resistance, surface smoothness and other requirements.
  • the ideal coatings are polyurethane coatings, acrylic coatings, silicone resin coatings and fluorocarbon polymer coatings. However, so far there has not been a single coating that can meet all the performance of blade protection.
  • paint protection can protect wind turbine blades to a certain extent, due to the unique solvent properties of the paint, small solvent molecules will inevitably escape after curing, resulting in micropores on the surface of the coating protective layer, and these micropores are the damage to the protective layer. Starting point. Therefore, the paint protection law requires multiple maintenance during the entire service period of the wind power blade, and the wind power blade is very difficult to maintain due to its special working environment.
  • polyurethane film is a feasible membrane material, but limited by the polar nature of the material itself, it is easy to be hydrolyzed during service, and has poor anti-fouling and anti-icing capabilities. Therefore, the life of the polyurethane film is very short, and it is difficult to match the service life of the wind turbine blade.
  • Kleborg Rubber Co., Ltd. of Germany provides a composite membrane for wind turbine blade protection in patent CN102458839A.
  • the laminating process of the composite film adopts vacuum hot pressing to cover the composite film on the leading edge of the blade during the blade manufacturing process.
  • the process is complicated and cannot be used for existing blades, which greatly reduces the application range of the composite film.
  • Ultra-high molecular weight polyethylene (UHMWPE) film has excellent wear resistance and impact resistance, as well as excellent impact resistance at low temperatures; low friction coefficient, non-polarity, low surface energy, good dirt resistance and anti-icing performance; And its excellent chemical stability makes it widely used in various fields. There are no reports about its application in the protection of wind power blades.
  • the present invention provides a preparation method and application of an ultra-high molecular weight polyethylene composite film, so as to achieve full coating protection of wind power blades, and protect wind power blades from dirt and rain during their service. Corrosion damage, while having the purpose of good weather resistance.
  • a preparation method of ultra-high molecular weight polyethylene composite film including the following steps:
  • the modifier is graphene as a detangling agent and polyethylene wax as a dispersant, and the amount of the modifier is 2-10%.
  • thermoplastic elastomer material is one of ethylene propylene rubber, modified polyacrylate rubber, fluorinated rubber, acrylonitrile-butadiene-rubber or polyurethane.
  • the transition layer material is one of ethylene acrylic acid copolymer, EPDM rubber, and ethylene-vinyl acetate copolymer.
  • the viscosity average molecular weight of the ultra-high molecular weight polyethylene in the step (1) is more than 1.5 million, and the mass flow rate of the solution of the modified ultra-high molecular weight polyethylene is 0.2-2.0 g/10 min.
  • the thickness of the modified UHMWPE layer is less than or equal to that of the thermoplastic elastomer material layer. Thickness, the surface of the thermoplastic elastomer material layer has a mechanical grid pattern.
  • the thickness of the transition layer is less than the thickness of the modified UHMWPE layer, and the composite film is a double Composite film with smooth surface.
  • the film is passed through the backing roller Adhesive and cooling enter the winding machine to wind to obtain the adhesive composite film product.
  • the type of adhesive used for the back adhesive is a solvent-based adhesive or a solvent-free thermoplastic pressure-sensitive adhesive
  • the thickness of the back adhesive layer is 50-500 ⁇ m.
  • the composite film prepared by the above preparation method is applied to the wind power blade manually or mechanically according to the size information of the wind power blade at high altitude, and the film is completed. Afterwards, the seam is welded by heat and pressure.
  • the preparation method of the ultra-high molecular weight polyethylene composite film makes the ultra-high molecular weight polyethylene meet the requirements of melt extrusion by adding a modifier, so that the ultra-high molecular weight polyethylene film can be extruded through the melt.
  • This method of production eliminates the shortcomings of discontinuity and uneven thickness caused by the traditional turning process, and provides favorable conditions for the continuous and diversified production of ultra-high molecular weight polyethylene films.
  • ultra-high molecular weight polyethylene can be closely composited with a variety of thermoplastic elastomers, so that an elastic layer is formed between the ultra-high molecular weight polyethylene and the matrix, and the resulting composite film contains thermoplastic elastomer materials.
  • the surface of the layer has a mechanical grid pattern, and epoxy resin is added to the surface of the composite film and the wind power blade.
  • the composite film can be firmly fixed on the surface of the wind power blade base through the principle of mechanical interlocking.
  • the existence of the elastomer layer gives The good elasticity of the composite film is improved, and the impact resistance of the composite film during use is greatly improved.
  • the existence of the transition layer in the composite film enables UHMWPE to produce structural strength bonding with most polymer matrices, which can improve the shortcomings of poor adhesion between UHMWPE and wind turbine blade substrates.
  • the use of acrylic acid Two-component adhesive, epoxy resin two-component adhesive or polyurethane adhesive can make the composite film stand well on the wind power blade substrate. It is easy to operate when using a composite film with adhesive backing for pasting.
  • Figure 1 is a schematic diagram of a (b) composite membrane product disclosed in an embodiment of the present invention.
  • thermoplastic elastomer material layer in the composite film product a disclosed in the embodiment of the present invention
  • Figure 3 is a schematic diagram of a composite film product c disclosed in an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a back adhesive composite film product b disclosed in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a back adhesive composite film product c disclosed in an embodiment of the present invention.
  • Figure 6 is a production process flow chart of composite membrane product a
  • Figure 7 is a production process flow chart of composite film product b and adhesive composite film product b;
  • Figure 8 is a production process flow chart of composite film product c and adhesive composite film product c;
  • Modified UHMWPE 2. Thermoplastic elastomer material; 3. Transition layer material; 4. Adhesive.
  • the present invention provides a preparation method and application of an ultra-high molecular weight polyethylene composite membrane.
  • the specific examples are as follows:
  • an ultra-high molecular weight polyethylene double-layer composite film production device includes extruder one, extruder two, co-extrusion die, three-roll calender and winding machine.
  • the first extruder, the second extruder, the co-extrusion die, the three-roll calender, and the winding machine are arranged in sequence.
  • the above-mentioned extruder is a single-screw or twin-screw extruder, the base and temperature are set at 100-270°C, the film forming die is heated by direct electric heating, and the extrusion pressure is 10-50Mpa.
  • a production device for ultra-high molecular weight polyethylene three-layer composite film including extruder one, extruder two, extruder three, co-extrusion die, three-roll calender and winding machine .
  • extruder one, extruder two, extruder three, co-extrusion die, three-roll calender, and winder are arranged in sequence.
  • the above-mentioned extruder is a single-screw or twin-screw extruder, the base and temperature are set at 100-270°C, the film forming die is heated by direct electric heating, and the extrusion pressure is 10-50Mpa.
  • a production device for ultra-high molecular weight polyethylene double-layer composite adhesive film including extruder one, extruder two, co-extrusion die, three-roll calender, and adhesive roll And winder.
  • the first extruder, the second extruder, the co-extrusion die, the three-roll calender, the rubber-backed roller, and the winding machine are arranged in sequence.
  • the above-mentioned extruder is a single-screw or twin-screw extruder, the base and temperature are set at 100-270°C, the film forming die is heated by direct electric heating, and the extrusion pressure is 10-50Mpa.
  • a production device for ultra-high molecular weight polyethylene three-layer composite adhesive film including extruder one, extruder two, extruder three, co-extrusion die, three-roll calender, back Cots and winding machines.
  • extruder one, extruder two, extruder three, co-extrusion die, three-roll calender, back rubber roll, and winder are arranged in sequence.
  • the above-mentioned extruder is a single-screw or twin-screw extruder, the base and temperature are set at 100-270°C, the film forming die is heated by direct electric heating, and the extrusion pressure is 10-50Mpa.
  • the ultra-high molecular weight polyethylene After blending the ultra-high molecular weight polyethylene with a viscosity average molecular weight of 3 million and the modifier, it is melted into a granular modified ultra-high molecular weight polyethylene.
  • the modifiers are graphene as a detangling agent and polyethylene wax as a dispersing agent.
  • the amount of graphene as a detangling agent is 3%, the amount of polyethylene wax as a dispersant is 7%, and the amount of ultra-high molecular weight polyethylene is 90%. Percentage of quality score.
  • the MFR (melt mass flow rate, melt mass flow rate) of the obtained modified ultra-high molecular weight polyethylene pellets is 1 g/10 min.
  • the modified ultra-high molecular weight polyethylene (UPE) raw materials and ethylene-vinyl acetate copolymer (EVA) raw materials are extruded through a single screw extruder to form a melt ,
  • the melt passes through the co-extrusion mold to form a co-extrusion composite film.
  • the screw length-to-diameter ratio of the UHMWPE raw material extruder is 30:1, and the temperature of the four zones is set to 100, 180, 240, 270°C; the length of the screw length of the ethylene vinyl acetate copolymer (EVA) raw material extruder The ratio is 30:1, and the temperatures of the four zones are set to 100, 180, 240, and 270°C respectively.
  • the extrusion pressure is set to 10Mpa, cooled, calendered and shaped by a three-roll calender, and taken up by a winder.
  • the thickness of the ultra-high molecular weight polyethylene layer is 200 ⁇ m
  • the thickness of the EVA layer is 50 ⁇ m
  • the total thickness is 250 ⁇ m
  • the width is It is a 500cm UPE-EVA composite film product b, as shown in Figure 1.
  • the modified ultra-high molecular weight polyethylene (UPE) and polyurethane (TPU) raw materials are extruded through a single-screw extruder to form a melt, and the melt is passed through a co-extrusion die to form a co-extrusion die. Squeeze the composite film.
  • the screw length-to-diameter ratio of the UHMWPE material extruder is 30:1, and the temperature of the four zones is set to 100, 180, 240, 270°C; the screw length-to-diameter ratio of the TPU material extruder is 30:1, and the temperature of the four zones is 30:1.
  • the temperature was set to 100, 180, 240, and 270°C, respectively.
  • the extrusion pressure is set to 10Mpa, cooled, calendered and shaped by a three-roll calender, and taken up by a winder to obtain an ultra-high molecular weight polyethylene layer with a thickness of 200 ⁇ m, a TPU layer with a thickness of 200 ⁇ m, and a total thickness of 400 ⁇ m.
  • the product has a pattern effect on the surface of the TPU layer, as shown in Figure 2.
  • the modified ultra-high molecular weight polyethylene (UPE) and ethylene vinyl acetate copolymer (EVA) raw materials are extruded to form a melt through a single screw extruder.
  • the melt passes through a co-extrusion die to form a co-extrusion composite film.
  • the screw length-to-diameter ratio of the UHMWPE raw material extruder is 30:1, and the temperature of the four zones is set to 100, 180, 240, 270°C; the length of the screw length of the ethylene vinyl acetate copolymer (EVA) raw material extruder The ratio is 30:1, and the temperatures of the four zones are set to 100, 180, 240, and 270°C respectively.
  • the extrusion pressure is set to 10Mpa, cooled, and then calendered and shaped by a three-roll calender. Acrylic pressure-sensitive adhesive is prepared on the EVA surface through a backing roller, and the thickness of the ultra-high molecular weight polyethylene is obtained by the winding machine.
  • UPE-EVA composite back adhesive film product b with a thickness of 200 ⁇ m, an EVA layer thickness of 50 ⁇ m, a pressure-sensitive adhesive layer thickness of 50 ⁇ m, a total thickness of 300 ⁇ m, and a width of 500 cm, as shown in Figure 4.
  • the modified ultra-high molecular weight polyethylene raw materials UPE
  • EPDM ethylene propylene propylene rubber
  • the screw length-to-diameter ratio of the UHMWPE material extruder is 30:1, and the temperature of the four zones is set to 100, 180, 240, and 270°C respectively;
  • the screw length-to-diameter ratio of the ethylene propylene rubber (EPM) material extruder is 30 :1, the temperature of the four zones is set to 100, 180, 240, 270°C;
  • the ratio of length to diameter of the extruder screw for EPDM raw material is 30:1, and the temperature of the four zones is set to 100, 180 respectively , 240, 270°C.
  • the extrusion pressure is set to 10Mpa, cooled, calendered and shaped by a three-roll calender, and taken up by a winder to obtain an ultra-high molecular weight polyethylene layer with a thickness of 200 ⁇ m, an EPM layer with a thickness of 200 ⁇ m, and an EPDM layer with a thickness of 50 ⁇ m.
  • the UPE-EPM-EPDM composite film product c with a total thickness of 450 ⁇ m and a width of 500 cm is shown in Figure 3.
  • the middle layer of the product is made of thermoplastic elastomer material, which can play a role in shock absorption.
  • the bottom layer is a transition layer material with a relatively thin thickness, which can improve the bonding performance of the composite film.
  • the modified ultra-high molecular weight polyethylene raw materials (UPE), modified polyacrylate rubber (EAM), and ethylene acrylic acid copolymer (EAA) raw materials are extruded through a single screw
  • the machine is extruded to form a melt, and the melt is passed through a co-extrusion die to form a co-extrusion composite film.
  • the screw length-to-diameter ratio of the UHMWPE raw material extruder is 30:1, and the temperature of the four zones is set to 100, 180, 240, 270°C; the modified polyacrylate rubber (EAM) raw material extruder screw length-to-diameter ratio
  • the temperature of the four zones is set to 100, 180, 240, and 270°C respectively;
  • the length to diameter ratio of the screw of the ethylene acrylic acid copolymer (EAA) raw material extruder is 30:1, and the temperature of the four zones is set to 100, 180, 240, 270°C.
  • the extrusion pressure is set to 10Mpa, cooled, and then calendered and shaped by a three-roll calender.
  • Acrylic pressure-sensitive adhesive is prepared on the EAA layer through the backing roller, and is wound by a winder to obtain the thickness of the ultra-high molecular weight polyethylene layer.
  • UPE-EAM-EAA composite back adhesive film product c with a thickness of 200 ⁇ m, EAM layer thickness of 200 ⁇ m, EAA layer thickness of 50 ⁇ m, pressure-sensitive adhesive layer thickness of 50 ⁇ m, total thickness of 500 ⁇ m, and width of 500cm, as shown in Figure 5 The product.
  • UPE-EPM-EPDM composite film product c to protect 2.0MW wind turbine blades, and analyze the 67m-long blades in a tailor-made way to obtain the size of the composite film that fully covers the blades to ensure that the film is applied.
  • the composite film can follow the shape, and then the blade is artificially pasted.
  • the adhesive used is an epoxy resin two-component adhesive. After the pasting is completed, it is cured for 24 hours, and then the seam is welded with a portable hot-press welder to ensure that the film surface is smooth.
  • this type of composite film can protect the blades well during the entire service life of the blade; the ultra-high molecular weight polyethylene film has a smooth surface and low friction coefficient, which can increase the power generation by 3%; in addition, the ultra-high molecular weight polyethylene The film has good anti-icing performance, which greatly improves the safety of the blade running in a low temperature environment.
  • the above technical solutions form a complete set of high-altitude operation process flow for implementing the film protection of wind power blades.
  • the hot-press welding technology realizes the seamless connection of the film and the film. Through this process, the full-covering protection of the wind power blades can be realized to protect the wind power.
  • the blade is protected from dirt and rain erosion during its service period, and has good weather resistance.
  • the excellent anti-icing ability of ultra-high molecular weight polyethylene composite film will make the method of solving the problem of icing on the blade surface by adding a heating wire to the blade matrix become a thing of the past. This is not only a breakthrough in the protection of wind power blades, but also An innovation in the production of wind turbine blades.
  • the filming process makes up for the discontinuity of film protection relative to paint protection, and creates good conditions for the promotion of film protection methods for wind power blades.

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  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
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Abstract

本发明公开了一种超高分子量聚乙烯复合膜的制备方法及应用，制备方法包括以下步骤：(1)超高分子量聚乙烯的改性，将超高分子量聚乙烯与改性剂共混后，经熔融制成颗粒状的改性超高分子量聚乙烯；(2)将改性超高分子量聚乙烯与热塑性弹性体材料和/或过渡层材料共挤成膜。根据高空的风电叶片的尺寸信息，采用人工或者机械的方法将该复合膜贴合于风电叶片上，贴膜完成后对接缝进行热压焊接。本发明所公开的复合膜能够实现对风电叶片的全包覆保护，保护风电叶片在其服役期间免受脏污、雨蚀的破坏，同时拥有良好的耐候性能。

Description

一种超高分子量聚乙烯复合膜的制备方法及应用 技术领域
本发明涉及一种风电叶片保护膜的制备方法，特别涉及一种用于保护风电叶片的超高分子量聚乙烯复合膜的制备方法及应用。
背景技术
风电叶片是风力发电机的核心部件之一，其良好的设计、可靠的质量和优越的性能是保证风电机组正常稳定运行的决定因素。风电叶片在运行中其叶尖线速度可达80m/s。如此高的速度下风电叶片尤其是叶片的前缘部分会遭受来自空气中的风沙、盐雾、雨滴的侵蚀，使得叶片气动性能下降，从而影响发电效率。
目前，在风电叶片的保护方面应用最为广泛的是涂料保护。根据涂料性能指标：强的附着力、一定的柔韧性、较强的耐磨耐冲击性能、耐候性能、表面平滑性能等要求。目前较为理想的涂料为聚氨酯型涂料，丙烯酸类涂料，有机硅树脂涂料和氟碳聚合物涂料。但是，至今为止还没有一种涂料能全部满足叶片保护的全部性能。
涂料保护虽能在一定程度上保护风电叶片，但是由于涂料特有的溶剂性质，在固化后必然会有溶剂小分子逃逸，从而使涂料保护层表面出现微孔，而这些微孔即是保护层损坏的起始点。所以，涂料保护法，在风电叶片的整个服役期间需要多次的维护，而风电叶片因其特殊的工作环境使得维护工作非常困难。
目前，聚氨酯薄膜是一种可行的膜材料，但受限于材料本身的极性性质，在服役期间容易水解、且抗脏污与抗结冰能力差。因此，聚氨酯薄膜寿命很短，难以匹配风电叶片的服役期。
德国克莱博格橡胶股份有限公司在专利CN102458839A中提供了一种用于风电叶片保护的复合膜。但是复合膜的贴合工艺采用的是通过真空热压的方式在叶片制作过程中将复合膜覆在叶片前缘，工艺复杂，且对已有叶片无法使用，大大减少了复合膜的使用范围。
超高分子量聚乙烯(UHMWPE)薄膜具有优异的耐磨，耐冲击性能，低温状态下的耐冲击性能同样优异；摩擦系数小，无极性、表面能低，抗脏污、抗结冰性能好；以及非常优秀的化学稳定性能使得其在各个领域都有相当广泛的应用。目前还未见将其很好地应用于风电叶片的保护上的报道。
发明内容
为解决上述技术问题，本发明提供了一种超高分子量聚乙烯复合膜的制备方法及应用，以达到实现对风电叶片的全包覆保护，保护风电叶片在其服役期间免受脏污、雨蚀的破坏，同时拥有良好的耐候性能的目的。
为达到上述目的，本发明的技术方案如下：
一种超高分子量聚乙烯复合膜的制备方法，包括以下步骤：
(1)超高分子量聚乙烯的改性，将超高分子量聚乙烯与改性剂共混后，经熔融制成颗粒状的改性超高分子量聚乙烯；
(2)将改性超高分子量聚乙烯与热塑性弹性体材料和/或过渡层材料共挤成膜，当改性超高分子量聚乙烯与热塑性弹性体材料和过渡层材料共挤成膜时，热塑性弹性体材料位于改性超高分子量聚乙烯和过渡层材料之间。
上述方案中，所述改性剂为解缠结剂石墨烯和分散剂聚乙烯蜡，所述改性剂用量为2-10％。
上述方案中，所述热塑性弹性体材料为乙丙橡胶、变性聚丙烯酸酯橡胶、氟化橡胶、丙烯腈-丁二烯-橡胶或者聚氨酯中的一种。
上述方案中，所述过渡层材料为乙烯丙烯酸共聚物、三元乙丙橡胶、乙烯-醋酸乙烯酯共聚物中的一种。
上述方案中，所述步骤(1)中的超高分子量聚乙烯的粘均分子量为150万以上，改性超高分子量聚乙烯的溶体质量流动速率为0.2～2.0g/10min。
上述方案中，所述步骤(2)中，将改性超高分子量聚乙烯与热塑性弹性体材料共挤成膜时，改性超高分子量聚乙烯层的厚度小于或者等于热塑性弹性体材料层的厚度，热塑性弹性体材料层表面具有机械网格状花纹。
上述方案中，所述步骤(2)中，将改性超高分子量聚乙烯与过渡层材料共挤成膜时，过渡层厚度小于改性超高分子量聚乙烯层的厚度，该复合膜为双面光滑的复合膜。
上述方案中，将改性超高分子量聚乙烯与过渡层材料共挤成膜后，或者将改性超高分子量聚乙烯与热塑性弹性体材料和过渡层材料共挤成膜后，经过背胶辊背胶、冷却进入缠绕机缠绕，得到背胶复合膜产品。
进一步的技术方案中，背胶所用的胶黏剂的类型为溶剂型胶黏剂或者是无溶剂的热塑性压敏胶，背胶层厚度为50-500μm。
一种超高分子量聚乙烯复合膜的应用，采用上述制备方法制得的复合膜，根据高空的风 电叶片的尺寸信息，采用人工或者机械的方法将该复合膜贴合于风电叶片上，贴膜完成后对接缝进行热压焊接。
通过上述技术方案，本发明提供的超高分子量聚乙烯复合膜的制备方法通过加入改性剂使超高分子量聚乙烯达到熔体挤出的要求，使得超高分子量聚乙烯薄膜可以通过熔体挤出方式生产，摆脱了传统的车削工艺带来的不连续，厚度不均匀的缺点，为超高分子量聚乙烯薄膜的连续多样化生产提供了有利条件。
此外，通过熔融共挤技术可以将超高分子量聚乙烯与多种热塑性弹性体紧密的复合，这样在超高分子量聚乙烯和基体中间形成一层弹性层，制得的复合膜中热塑性弹性体材料层表面具有机械网格状花纹，在复合膜与风电叶片表面添加环氧树脂，通过机械互锁的原理即可将复合膜牢牢地固定在风电叶片基体表面，此外，弹性体层的存在赋予了复合膜良好的弹性性能，大大提高了复合膜在使用过程中的耐冲击性能。
复合膜中过渡层的存在使得超高分子量聚乙烯可以和绝大多数高分子基体产生结构强度的结合力，可以改善超高分子量聚乙烯与风电叶片基体之间粘接性能差的缺点，利用丙烯酸类双组份胶、环氧树脂类双组份胶或者聚氨酯类胶黏剂可以使复合膜能很好的站接到风电叶片基体上。采用带背胶的复合膜进行贴膜时，便于操作。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍。
图1为本发明实施例所公开的复合膜产品a(b)示意图；
图2为本发明实施例所公开的复合膜产品a中的热塑性弹性体材料层表面示意图；
图3为本发明实施例所公开的复合膜产品c示意图；
图4为本发明实施例所公开的背胶复合膜产品b示意图；
图5为本发明实施例所公开的背胶复合膜产品c示意图；
图6为复合膜产品a的生产工艺流程图；
图7为复合膜产品b和背胶复合膜产品b的生产工艺流程图；
图8为复合膜产品c和背胶复合膜产品c的生产工艺流程图；
图中，1、改性超高分子量聚乙烯；2、热塑性弹性体材料；3、过渡层材料；4、背胶。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
本发明提供了一种超高分子量聚乙烯复合膜的制备方法及应用，具体实施例如下：
结合图1与图6、图7，一种超高分子量聚乙烯双层复合膜的生产装置，包括挤出机一、挤出机二、共挤模具、三辊压延机与卷绕机。按照生产工艺流程图的先后次序，挤出机一、挤出机二、共挤模具、三辊压延机、卷绕机依次排布。其中，上述挤出机为单螺杆或者双螺杆挤出机，基础及温度设定为100～270℃，薄膜成型模具采用直接电加热方式加热，挤出压力为10～50Mpa。
结合图3和图8，一种超高分子量聚乙烯三层复合膜的生产装置，包括挤出机一、挤出机二、挤出机三、共挤模具、三辊压延机与卷绕机。按照生产工艺流程图的先后次序，挤出机一、挤出机二、挤出机三、共挤模具、三辊压延机、卷绕机依次排布。其中，上述挤出机为单螺杆或者双螺杆挤出机，基础及温度设定为100～270℃，薄膜成型模具采用直接电加热方式加热，挤出压力为10～50Mpa。
结合图4与图6、图7，一种超高分子量聚乙烯双层复合背胶膜的生产装置，包括挤出机一、挤出机二、共挤模具、三辊压延机、背胶辊和卷绕机。按照生产工艺流程图的先后次序，挤出机一、挤出机二、共挤模具、三辊压延机、背胶辊、卷绕机依次排布。其中，上述挤出机为单螺杆或者双螺杆挤出机，基础及温度设定为100～270℃，薄膜成型模具采用直接电加热方式加热，挤出压力为10～50Mpa。
结合图5和图8，一种超高分子量聚乙烯三层复合背胶膜的生产装置，包括挤出机一、挤出机二、挤出机三、共挤模具、三辊压延机、背胶辊和卷绕机。按照生产工艺流程图的先后次序，挤出机一、挤出机二、挤出机三、共挤模具、三辊压延机、背胶辊、卷绕机依次排布。其中，上述挤出机为单螺杆或者双螺杆挤出机，基础及温度设定为100～270℃，薄膜成型模具采用直接电加热方式加热，挤出压力为10～50Mpa。
超高分子量聚乙烯的改性：
将粘均分子量为300万的超高分子量聚乙烯与改性剂共混后，经熔融制成颗粒状的改性超高分子量聚乙烯。改性剂为解缠结剂石墨烯和分散剂聚乙烯蜡，解缠结剂石墨烯用量为3％，分散剂聚乙烯蜡用量为7％，超高分子量聚乙烯用量为90％，上述为质量分数百分比。得到的改性超高分子量聚乙烯颗粒料的MFR(melt mass flow rate，溶体质量流动速率)为1g/10min。
实施例一：
采用如图7上半部分所示的生产工艺，将改性后的超高分子量聚乙烯(UPE)原料，乙 烯-醋酸乙烯酯共聚物(EVA)原料经过单螺杆挤出机挤出形成熔体，熔体经过共挤模具形成共挤复合膜。超高分子量聚乙烯原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃；乙烯醋酸乙烯酯共聚物(EVA)原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃。挤出压力设定为10Mpa，冷却，经过三辊压延机压延、定型，通过卷绕机卷取，得到超高分子量聚乙烯层厚度为200μm，EVA层厚度为50μm，总厚度为250μm，幅宽为500cm的UPE-EVA复合膜产品b，如图1所示的产品。
实施例二：
采用如图6所示的生产工艺，将改性后的超高分子量聚乙烯原料(UPE)，聚氨酯(TPU)原料经过单螺杆挤出机挤出形成熔体，熔体经过共挤模具形成共挤复合膜。超高分子量聚乙烯原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃；TPU原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃。挤出压力设定为10Mpa，冷却，进过三辊压延机压延、定型，通过卷绕机卷取，得到超高分子量聚乙烯层厚度为200μm，TPU层厚度为200μm，总厚度为400μm，幅宽为500cm的UPE-TPU复合膜产品a，如图1所示的产品。该产品在TPU层表面有花纹效果，如图2所示。
实施例三：
采用如图7下半部分所示的生产工艺，将改性后的超高分子量聚乙烯原料(UPE)，乙烯醋酸乙烯酯共聚物(EVA)原料经过单螺杆挤出机挤出形成熔体，熔体经过共挤模具形成共挤复合膜。超高分子量聚乙烯原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃；乙烯醋酸乙烯酯共聚物(EVA)原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃。挤出压力设定为10Mpa，冷却，进过三辊压延机压延、定型，通过背胶辊在EVA面备上丙烯酸酯类压敏胶，卷绕机卷取，得到超高分子量聚乙烯层厚度为200μm，EVA层厚度为50μm，压敏胶层厚度为50μm，总厚度为300μm，幅宽为500cm的UPE-EVA复合背胶膜产品b，如图4所示的产品。
实施例四：
采用如图8上半部分所示的生产工艺，将改性后的超高分子量聚乙烯原料(UPE)、乙丙橡胶(EPM)、三元乙丙橡胶(EPDM)原料经过单螺杆挤出机挤出形成熔体，熔体经过共挤模具形成共挤复合膜。超高分子量聚乙烯原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃；乙丙橡胶(EPM)原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃；三元乙丙橡胶(EPDM)原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃。挤出压力设定为10Mpa，冷却，进过三辊压延机 压延、定型，通过卷绕机卷取，得到超高分子量聚乙烯层厚度为200μm，EPM层厚度为200μm，EPDM层厚度为50μm，总厚度为450μm，幅宽为500cm的UPE-EPM-EPDM复合膜产品c，如图3所示的产品。该产品中间层为热塑性弹性体材料，可以起到减震作用。底层为过渡层材料，厚度比较薄，可以改善复合膜的粘结性能。
实施例五：
采用如图8下半部分所示的生产工艺，将改性后的超高分子量聚乙烯原料(UPE)、变性聚丙烯酸酯橡胶(EAM)、乙烯丙烯酸共聚物(EAA)原料经过单螺杆挤出机挤出形成熔体，熔体经过共挤模具形成共挤复合膜。超高分子量聚乙烯原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃；变性聚丙烯酸酯橡胶(EAM)原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃；乙烯丙烯酸共聚物(EAA)原料挤出机螺杆长径比为30:1，四区温度分别设定为100、180、240、270℃。挤出压力设定为10Mpa，冷却，进过三辊压延机压延、定型，通过背胶辊在EAA层面备上丙烯酸酯类压敏胶，卷绕机卷取，得到超高分子量聚乙烯层厚度为200μm，EAM层厚度为200μm，EAA层厚度为50μm，压敏胶层厚度为50μm，总厚度为500μm，幅宽为500cm的UPE-EAM-EAA复合背胶膜产品c，如图5所示的产品。
应用实例：
使用UPE-EPM-EPDM复合膜产品c对2.0MW风电叶片进行保护，采量体裁衣的方式对67m长的叶片进行三维数据分析得出对叶片进行全包覆的复合膜的尺寸，保证在贴膜的时候复合膜能够随形，随后对叶片进行人工贴膜，所用胶黏剂为环氧树脂类双组份胶黏剂。黏贴完成，经过24h固化，随后利用手提式热压焊接器对接缝进行焊接保证贴膜表面光滑。
使用UPE-EAM-EAA复合背胶膜产品c对2.0MW风电叶片进行机械贴膜，首先是采集风电叶片的外观结构尺寸形成三维空间结构构架；然后根据叶片的尺寸信息(67m长)，利用计算机模拟在保证随形的前提下拟出最佳的贴膜方法所需要的复合膜的尺寸数据，对复合膜做出相应的裁剪；随后利用人工智能机器人担载复合膜进行高空的贴膜施工；贴膜时将背胶表面的保护层揭掉，直接使用背胶将复合膜贴敷于叶片上，在贴膜完成以后对接缝进行热压焊接，从而达到无缝连接的效果。
实验证明，此类复合膜在叶片整个服役期内都可以对叶片进行很好的保护；超高分子量聚乙烯膜表面光滑，摩擦系数小，可以提高发电量3％；此外，超高分子量聚乙烯薄膜具有很好的抗结冰性能，大大提高了叶片在低温环境下运行的安全性。
上述技术方案形成了一套完整的实施风电叶片贴膜保护的高空作业工艺流程，热压焊接 技术实现了膜与膜的无缝连接，通过此工艺可以实现对风电叶片的全包覆保护，保护风电叶片在其服役期间免受脏污、雨蚀的破坏，同时拥有良好的耐候性能。此外，超高分子量聚乙烯复合膜优秀的抗结冰能力将使得通过在叶片基体中添加加热丝来解决叶片表面覆冰问题的方法成为过去，这不仅仅是风电叶片保护的一种突破，也是风电叶片生产的一种革新。贴膜工艺弥补了贴膜保护相对涂料保护的不连续的缺陷，为风电叶片的贴膜保护方法的推广创造了良好的条件。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种超高分子量聚乙烯复合膜的制备方法，其特征在于，包括以下步骤：
    (1)超高分子量聚乙烯的改性，将超高分子量聚乙烯与改性剂共混后，经熔融制成颗粒状的改性超高分子量聚乙烯；
    (2)将改性超高分子量聚乙烯与热塑性弹性体材料和/或过渡层材料共挤成膜，当改性超高分子量聚乙烯与热塑性弹性体材料和过渡层材料共挤成膜时，热塑性弹性体材料位于改性超高分子量聚乙烯和过渡层材料之间。
  2. 根据权利要求1所述的一种超高分子量聚乙烯复合膜的制备方法，其特征在于，所述改性剂为解缠结剂石墨烯和分散剂聚乙烯蜡，所述改性剂用量为2-10％。
  3. 根据权利要求1所述的一种超高分子量聚乙烯复合膜的制备方法，其特征在于，所述热塑性弹性体材料为乙丙橡胶、变性聚丙烯酸酯橡胶、氟化橡胶、丙烯腈-丁二烯-橡胶或者聚氨酯中的一种。
  4. 根据权利要求1所述的一种超高分子量聚乙烯复合膜的制备方法，其特征在于，所述过渡层材料为乙烯丙烯酸共聚物、三元乙丙橡胶、乙烯-醋酸乙烯酯共聚物中的一种。
  5. 根据权利要求1所述的一种超高分子量聚乙烯复合膜的制备方法，其特征在于，所述步骤(1)中的超高分子量聚乙烯的粘均分子量为150万以上，改性超高分子量聚乙烯的溶体质量流动速率为0.2～2.0g/10min。
  6. 根据权利要求1所述的一种超高分子量聚乙烯复合膜的制备方法，其特征在于，所述步骤(2)中，将改性超高分子量聚乙烯与热塑性弹性体材料共挤成膜时，改性超高分子量聚乙烯层的厚度小于或者等于热塑性弹性体材料层的厚度，热塑性弹性体材料层表面具有机械网格状花纹。
  7. 根据权利要求1所述的一种超高分子量聚乙烯复合膜的制备方法，其特征在于，所述步骤(2)中，将改性超高分子量聚乙烯与过渡层材料共挤成膜时，过渡层厚度小于改性超高分子量聚乙烯层的厚度，该复合膜为双面光滑的复合膜。
  8. 根据权利要求1所述的一种超高分子量聚乙烯复合膜的制备方法，其特征在于，将改性超高分子量聚乙烯与过渡层材料共挤成膜后，或者将改性超高分子量聚乙烯与热塑性弹性体材料和过渡层材料共挤成膜后，经过背胶辊背胶、冷却进入缠绕机缠绕，得到背胶复合膜产品。
  9. 根据权利要求8所述的一种超高分子量聚乙烯复合膜的制备方法，其特征在于，背胶所用的胶黏剂的类型为溶剂型胶黏剂或者是无溶剂的热塑性压敏胶，背胶层厚度为50-500 μm。
  10. 一种超高分子量聚乙烯复合膜的应用，采用如权利要求1所述的制备方法制得的复合膜，其特征在于，根据高空的风电叶片的尺寸信息，采用人工或者机械的方法将该复合膜贴合于风电叶片上，贴膜完成后对接缝进行热压焊接。
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