36results about How to "Won't become brittle" patented technology

The invention discloses a hot roll for rolling a titanium plate, and a manufacturing method of the hot roll. The hot roll comprises the following chemical constituents in percentage by weight: 0.30-0.50% of C, 0.60-2.00% of Si, 0.20-1.00% of Mn, 4.50-6.00% of Cr, 0.05-0.65% of Ni, 1.00-2.00% of Mo, 0.50-1.50% of V, less than or equal to 0.025% of P, less than or equal to 0.020% of S, and the balance of Fe and unavoidable impurities. The manufacturing method of the hot roll for rolling the titanium plate comprises the processing steps of steel ingot refining, roll blank forging, thermal refining, induction quenching treatment, tempering treatment and the like. Compared with the traditional hot roll made of a Cr3 material, the hot roll is good in abrasive resistance, corrosion resistance and thermal crack resistance, and the service life of the hot roll can be prolonged by above 70%.

The invention discloses double-layer electromagnetic shielding film. The shielding film comprises carrier film, a first insulating coating layer coated on the barrier film, a second insulating coatinglayer coated on the first insulating coating layer, a metal layer compounded on the metal layer, an electromagnetic wave shielding coating layer coated on the metal layer and release type protectivefilm arranged on the electromagnetic wave shielding coating layer; the carrier film is matt release film; coating of the first insulating coating layer is wear-resisting acrylate coating or polyurethane coating, the abrasive resistance performance is greater than 1000 times, and the thickness is 1-2 microns; coating of the second insulating coating layer is high-filling high-toughness acrylate coating or polyurethane coating or rubber coating, the number of bending resistance times is greater than 80000, and the thickness is 2-7 microns; the metal layer is thin film prepared from rolled metalfoils, and the thickness of the metal layer is 3-9 microns. The film has better toughness, bending resistance performance and product smoothness and a better shielding effect.

The invention provides an inorganic foaming filling and reinforcing composition for a coal mine as well as a using method and application thereof. The inorganic foaming filling and reinforcing composition for the coal mine can be used as a novel safe plugging and reinforcing material, is especially suitable for plugging and reinforcing of the coal mine, and is the best water-proof, fire-proof, gas-proof, collapse-proof and accident-proof material.

The invention provides a novel FPC composite electromagnetic shielding film and a preparation method thereof. The method comprises the following steps: 1) preparing coating materials of a first insulation paint layer, a second insulation paint layer, an electromagnetic wave reflection coating layer and an electromagnetic wave absorbing coating layer; and 2) carrying out coating, wherein the firstinsulation paint layer is a wear-resisting coating, wear resistance being larger than 1000 times; the second insulation paint layer is a high-filling and high-toughness coating, bending resistance times being larger than 80000; the coating material of the electromagnetic wave reflection coating layer comprises reflection layer matrix resin and metal fillers, the metal fillers being flake silver-clad glass or flake silver-clad copper powders or leaf-like silver-clad copper powders or dendritic silver-clad copper powders; the ratio of the matrix resin and the metal fillers of the electromagneticwave reflection coating layer is 1:1.5-1:5; the electromagnetic wave absorbing coating layer comprises absorbing layer matrix resin and wave absorbing materials; the carrier film is a matte release film. The novel FPC composite electromagnetic shielding film has better flexibility, bending resistance, product flatness and shielding effect.

The invention provides environment-friendly road marking paint and a preparation method thereof. The paint comprises, by weight, 35-53 parts of water-based acrylic resin, 0.02-0.05 part of bactericide, 0.7-0.9 part of defoaming agent, 0.6-0.7 part of dispersing agent, 0.02-0.03 part of thickening dispersant, 1-2 parts of distilled water, 2-10 parts of titanium dioxide, 33-47 parts of inorganic filler, 0.01-0.02 part of wetting agent, 18-21 parts of glass beads, 4-5 parts of volatile solvent and 2-3 parts of film-forming agent. The preparation method comprises the following steps that the materials are prepared; the water-based acrylic resin and a part of the volatile solvent are evenly mixed in a dispersing machine; the bactericide, the defoaming agent, the dispersing agent, the thickening dispersant and the wetting agent are sequentially added and evenly mixed; the titanium dioxide powder, the inorganic filler and the glass beads are added in batches and uniformly mixed; the distilled water, the remaining volatile solvent and the film-forming agent are sequentially added; after all the raw materials are added, uniform stirring is conducted.

The invention discloses a thermosetting compound fluorine-containing polyimide resin and a preparation method thereof, which aim at further improving the heat stability, temperature resistance and cold resistance of materials. The thermosetting compound fluorine-containing polyimide resin is prepared by compounding a component A and a compound B, wherein the mass ratio of the component A to the compound B is 1:(1-4); the component A is bisphenol AF-matrix fluorine-containing polyimide solution with the solid content of 10wt%-20wt%; and the component B is bisphenol AF phenoxy fluorine-containing polyimide solution with the solid content of 10wt%-20wt%. The thermosetting compound fluorine-containing polyimide resin has high dissolubility, heat stability, mechanical properties and melt processing performance. Besides, the preparation method is simple to operate, low in cost and environment-friendly, and can be adapted to the requirements of industrial production.

The invention discloses a special flow type silicone sealant for a road. The special flow type silicone sealant for the road comprise raw materials in parts by weight as follows: 54-58 parts of room temperature vulcanized methyl silicone rubber with the viscosity of 1,200-1,600 mPa*s, 115-125 parts of room temperature vulcanized methyl silicone rubber with the viscosity of 18,000-20,000 mPa*s, 210-220 parts of silica powder, 122-130 parts of nano calcium carbonate, 0.1-1 part of di-n-butyltin dilaurate, 22-30 parts of methyltris(methylethylketoxime)silane, 5-10 parts of vinyltris(methylethylketoxime)silane and 1-2 parts of a coupling agent. The special flow type silicone sealant for the road has excellent high-low-temperature resistance and weather aging resistance, cannot deform in an environment with the too high or too low temperature and has good extensibility, elasticity, convenience in construction and long service life.

The invention discloses a method for extracting ceramide from pineapples and application, and relates to the technical field of biological active substance preparation and application. The method comprises the steps that pineapple leaves and pineapple peel of immature pineapples are selected, the process routes for pineapple picking and preprocessing, freezing, drying, smashing, extracting, concentrating, extracting, separating, column chromatography isolation, gradient elution and re-crystallization are designed, the process design is reasonable, the toxicity of adopted solvents is small, noharsh condition is adopted, a high-purity N-fatty acyl-sphingol substance can be obtained, on the basis of NMR, MS and HPLC detection, the detection result displays that the N-fatty acyl-sphingol substance is 1-O-beta-D-glucose-N-docosanedioic acyl-hexadecanoic-4,10(E,E)-diene psychosine, the purity reaches 98.7%, the yield is increased to 0.13% from 0.0004%, and the method is suitable for large-scale technological production.

The invention provides a preparation method of a reflective electromagnetic shielding film for FPC, comprising the following steps: first, preparing a coating of a first insulating coating layer, a second insulating coating layer and an electromagnetic wave reflecting coating; 2, coat; The first insulating coating layer is an abrasion-resistant coating, and the abrasion resistance is more than 1000 times; The second insulating coating layer is a coating with high filling and high toughness, and the bending resistance is more than 80000; The coating of electromagnetic wave reflective coating comprises a base resin and a metal filler, wherein the metal filler is sheet silver-coated glass or sheet silver-coated copper powder or leaf silver-coated copper powder or dendritic silver-coated copper powder; The carrier membrane is matte photoionization membrane. The metal filler has a size of 1 to 2 [mi]m in the thickness direction, a planar size of 3 to 9 [mu]m, and 3 to 5 bifurcations on theleaf-shaped metal filler; the ratio of the matrix resin to the metal filler of the electromagnetic wave reflective coating is 1:1.5 to 1 :5 The invention has better flexibility, bending resistance, product flatness and shielding effect.

The production process of fancy artificial plate blank with natural color difference includes the following main steps: selecting timber of different colors; cutting into timber tow or skein; mixing and drying; soaking with glue and drying; metering and feeding; pressing and curing; demolding and post-finishing. The fancy artificial plate blank or column blank has color spots and color grains of various natural colors in different directions. It may be made into different products, such as floor board, wall plate, furniture, etc and has high density, high strength, color and grain variety, completely new visual effect and other advantages.

The invention discloses a UV primer for a glass surface. The technical scheme for preparing a high-transparent primer is that the components comprise, by weight, 40-50 parts of epoxy acrylate or modified epoxy acrylate, 30-40 parts of a monomer, 3-5 parts of a photoinitiator, 0.1-0.2 part of an antifoaming agent, 0.1-0.3 part of a substrate wetting agent, 0.2-0.5 part of a leveling agent, and 0.5-1 part of a dispersing agent, and 10-15 parts by weight of a filler and 4-6 parts by weight of an anti-settling agent can further be added to prepare the translucent or opaque primer. According to thepresent invention, the product is used as the primer for the glass surface.

The invention discloses a novel multi-purpose environment-friendly methanol-based alternative fuel and a preparing method thereof and belongs to the field of alcohol ether alternative fuel. The novel multi-purpose environment-friendly methanol-based alternative fuel is prepared from, by mass, 85-95 parts of methanol, 5-15 parts of a heat value regulator, 0-5 parts of a combustion stabilizing agent, 0-5 parts of a combustion improver, 0-5 parts of a thickening curing agent, 0-5 parts of a water-proof agent and 0-5 parts of a corrosion inhibitor. The novel multi-purpose environment-friendly methanol-based alternative fuel has the advantages of being large in methanol proportion, long in waterproof stable phase, and high in heat value and power performance; the cold staring performance, air resistance tolerance, low corrosion and rubber swelling prevention performance are superior to those of traditional methanol fuel, and the six existing problems hindering use and popularization of methanol gasoline for a long time are solved. The cost is low, and good economic benefits, social benefits and environmental benefits are achieved. The novel multi-purpose environment-friendly methanol-based alternative fuel is applied to boilers, automobile engines and other various occasions, and can be stably combusted for a long term, use equipment such as automobile engines does not need to be transformed, and the fuel can be directly used. The fuel is stored in a solid state, so that transportation is convenient, and use is safer.

The invention discloses a production formula of cold-resistant HIPS particles, which comprises the following components in percentage by weight: 85-95% of HIPS resin powder, 2-6.5% of cold-resistant agent, 0.5-1% of UV powder, and 0.5-1% of iron oxide black powder % and silicon steel powder 2 to 8%. The cold-resistant HIPS particles of the present invention have extremely high cold-resistant properties, greatly reduce their brittleness, that is, improve their physical properties such as tensile strength, flexural strength, and flexural modulus, and increase their toughness. In the environment of minus 40 degrees Celsius, it is not easy to age, not to become brittle, not easy to burst, and it is easy to demould when injection molding products, which helps to improve production efficiency and increase molding output.

The invention discloses anti-static, oil-proof, cold-proof and antiskid multifunctional safety shoes and belongs to the technical field of clothes production. A sole material is prepared from raw materials in parts by weight as follows: 30-50 parts of latex, 10-20 parts of ethyl butyrate, 5-8 parts of pottery clay, 5-8 parts of an accelerator, 3-8 parts of furfural resin, 1-2 parts of tailing powder, 3-8 parts of dibutyl ether, 1-2 parts of barium sulfate and 1-2 parts of sulfur; an upper material is prepared after canvas is coated with a cold-proof and oil-proof adhesive. The anti-static, oil-proof, cold-proof and antiskid multifunctional safety shoes adopt a brand-new formula, and the prepared safety shoes are comfortable to wear, have high anti-static capability and oil-proof capability, are not easily stained with dirt, cannot become brittle after being worn for a long time under the cold condition, are long in service life and are not easily stained with dirt due to the cold-proof and oil-proof adhesives covering the uppers.

The invention relates to the field of manufacturing high-performance carbon fibers, in particular to a preoxidation method for mesophase pitch fibers. The invention provides a method for pre-oxidizing mesophase pitch fibers, which comprises the following steps: (1) bundling the spun mesophase pitch fibers through a spinning oil agent to prepare rolled fiber precursors; (2) Unwinding the coiled fiber precursors through unwinding equipment, making the fiber precursors slowly wash with ethanol solution to remove the spinning oil, and then enter the pre-oxidation furnace; (3) the fiber precursors In the pre-oxidation furnace, the temperature is gradually raised and kept warm to complete the pre-oxidation. The invention innovatively adopts the scheme of oiling and bundling the spun pitch fiber first, then cleaning the spinning oil and then entering the pre-oxidation furnace, which can not only make the pitch fiber pre-oxidize in the bundled state, but also avoid spinning Effect of silk finish on preoxidation.

The invention discloses a multi-station hopper and relates to the field of building material machining. The multi-station hopper comprises feeding disks which are all sequentially connected vertically, a rotating shaft, an electromagnetic vibrator and a controller. The feeding disks are disks which are connected through the rotating shaft and made from soft iron; the inner surface of each feeding disk is provided with a slide way which spirally rises; an outlet of each slide way is an outlet of the corresponding feeding disk; a spiral spring is arranged between the corresponding feeding disk and the electromagnetic vibrator; an electromagnet capable of being attracted to or separated from the corresponding feeding disk is arranged in the electromagnetic vibrator; a starting switch is arranged on a shell of the electromagnetic vibrator; the electromagnetic vibrator is fixedly connected with the controller; a motor and a control circuit connected with the motor are arranged in the controller; and a shell of the controller is provided with an adjusting button which is electrically connected with the control circuit and can adjust the vibrating frequency of the electromagnetic vibrator and the rotating speed of the motor. The multi-station hopper can feed materials to various stations at the same time.

The invention discloses a production process of a water-milled carbonized bamboo summer sleeping mat, and relates to the technical field of bamboo summer sleeping mat processing. The production process of the water-milled carbonized bamboo summer sleeping mat comprises the following steps of bamboo skin strip preparation, drying, baking and carbon-burning, dipping treatment, cleaning and polishing, weaving and yarn covering. In the dipping treatment process, the carbon-burned bamboo skin strips are cleaned, then placed in a water mill to be subjected to water milling, taken out and drained. Then the bamboo skin strips are placed in a dipping tank containing a modification solution to be dipped and then placed in a constant-temperature furnace to be subjected to heat preservation treatment, and the modification solution is composed of sodium borate, N-acyl glutamate, triethanolamine, a pepper tree leaf extracting solution, a mugwort extracting solution and other raw materials. According to the water-milled carbonized bamboo summer sleeping mat provided by the invention, the preparation method of the bamboo summer sleeping mat is simple, operation is easy, the raw materials are easy to obtain, cost is low, the bamboo summer sleeping mat has the antibacterial and mosquito-repelling effects, the antibacterial and mosquito-repelling lasting time is long, and the bamboo summer sleeping mat further has the advantages of being high in strength, high in toughness, not prone to brittle fracture and long in service life.

The invention discloses anti-static, oil-proof, cold-proof and antiskid multifunctional safety shoes and belongs to the technical field of clothes production. A sole material is prepared from raw materials in parts by weight as follows: 30-50 parts of latex, 10-20 parts of ethyl butyrate, 5-8 parts of pottery clay, 5-8 parts of an accelerator, 3-8 parts of furfural resin, 1-2 parts of tailing powder, 3-8 parts of dibutyl ether, 1-2 parts of barium sulfate and 1-2 parts of sulfur; an upper material is prepared after canvas is coated with a cold-proof and oil-proof adhesive. The anti-static, oil-proof, cold-proof and antiskid multifunctional safety shoes adopt a brand-new formula, and the prepared safety shoes are comfortable to wear, have high anti-static capability and oil-proof capability, are not easily stained with dirt, cannot become brittle after being worn for a long time under the cold condition, are long in service life and are not easily stained with dirt due to the cold-proof and oil-proof adhesives covering the uppers.

The invention provides a preparation method of a reflective electromagnetic shielding film for FPC, comprising the following steps: first, preparing a coating of a first insulating coating layer, a second insulating coating layer and an electromagnetic wave reflecting coating; 2, coat; The first insulating coating layer is an abrasion-resistant coating, and the abrasion resistance is more than 1000 times; The second insulating coating layer is a coating with high filling and high toughness, and the bending resistance is more than 80000; The coating of electromagnetic wave reflective coating comprises a base resin and a metal filler, wherein the metal filler is sheet silver-coated glass or sheet silver-coated copper powder or leaf silver-coated copper powder or dendritic silver-coated copper powder; The carrier membrane is matte photoionization membrane. The metal filler has a size of 1 to 2 [mi]m in the thickness direction, a planar size of 3 to 9 [mu]m, and 3 to 5 bifurcations on theleaf-shaped metal filler; the ratio of the matrix resin to the metal filler of the electromagnetic wave reflective coating is 1:1.5 to 1 :5 The invention has better flexibility, bending resistance, product flatness and shielding effect.

A double-layer electromagnetic shielding film, comprising a bearer film (1), a first insulated coating layer (2) applied to the bearer film (1), a second insulated coating layer (3) applied to the first insulated coating layer (2), a metal layer (4) compounded onto the second insulated coating layer (3), an electromagnetic wave shielding coating layer (5) applied to the metal layer (4), and a protective release film (6) provided on the electromagnetic wave shielding coating layer, wherein the bearer film (1) is a matte release film; the coating of the first insulated coating layer (2) is abrasion resistant acrylate coating or polyurethane coating, the abrasion resistance is greater than 1,000 times, and the thickness is 1-2μm; the coating of the second insulated coating layer (3) is highly-filled and high-toughness acrylate coating, or polyurethane coating, or rubber coating, the number of bending-resistant times is greater than 80,000, and the thickness is 2-7μm; the metal layer (4) is a thin film made of rolled metal foil and has the thickness of 3-9μm. The double-layer electromagnetic shielding film has better toughness, bending-resistance and product smoothness, and a better shielding effect.

The production process of fancy artificial plate blank with natural color difference includes the following main steps: selecting timber of different colors; cutting into timber tow or skein; mixing and drying; soaking with glue and drying; metering and feeding; pressing and curing; demolding and post-finishing. The fancy artificial plate blank or column blank has color spots and color grains of various natural colors in different directions. It may be made into different products, such as floor board, wall plate, furniture, etc and has high density, high strength, color and grain variety, completely new visual effect and other advantages.

The invention discloses a Yao-people taoist scripture protective agent. Yao-people taoist scriptures have great value on knowing religious faith, social life and the like of the Yao people and furthercan provide novel materials for researching propagation and development of Taoism in minority areas and Southeast Asia countries. Enhancing protection on the Yao-people taoist scriptures can triggerinterest of domestic and oversea academic circles on Yao-people documents and prompt more scholars to participate in Yao-people Taoism researching teams, so that deserved value of the Yao-people taoist scriptures can be given to play. The protective agent disclosed by the invention can form a layer of protection film on the surfaces of the Yao-people taoist scriptures by utilizing polymer and a formula of the polymer, so that flexibility of the Yao-people taoist scriptures is improved, and mechanical strength and discoloration resistance of the Yao-people taoist scriptures are improved; furthermore, the Yao-people taoist scriptures are prevented from mildewing and being damaged by worms.

The invention discloses a high-tensile-strength environmentally-friendly plastic masterbatch polymer carrier and a preparation method thereof, the method is as follows: firstly using terephthalic acid, adipic acid and ethylene glycol for synthesis of environmentally-friendly biodegradable material PEAT (poly terephthalic acid / ethylene glycol adipate) as a main component of the masterbatch polymer carrier, using a screw extruder for blending and extruding 40%-90% by weight of PEAT, 5%-25% by weight of PLA, 1%-5% by weight of malacolac HY, 2%-15% by weight of PPC, 0.3%-2% by weight of rosin resin TF-100, 0-10% by weight of starch, 0-15% by weight of multilayer graphene, 0.1%-2% by weight of a compatilizer, 0.05%-0.2% by weight of an antioxidant A, 0.05%-0.15% by weight of a chain extender, 0.1%-0.5% by weight of a coupling agent and 0.1%-0.3-% by weight of a light stabilizer to obtain the masterbatch polymer carrier. The masterbatch polymer carrier has the characteristics of high molecular weight and uniform distribution, and has higher flexural and tensile strength and other excellent mechanical properties, and the synthesized polymer and materials used in the extrusion process all have degradation property, and belong to environment-friendly materials free of pollution to the environment.

The invention discloses an inorganic environment-friendly high-strength composite fireproof heat-insulation plate. The inorganic environment-friendly high-strength composite fireproof heat-insulationplate comprises, by weight, 150-250 parts of 525 cement, 100-200 parts of high-calcium powder, 150-250 parts of medium materials, 10-30 parts of adhesive powder, 20-40 parts of sodium silicate, 10-30parts of silicon and calcium powder, 10-30 parts of setting accelerators, 5-15 parts of foaming agents, 100-200 parts of 425 cement and 20-80 parts of inorganic fibers. The inorganic environment-friendly high-strength composite fireproof heat-insulation plate has the advantages that good heat-insulation effects can be realized by the inorganic environment-friendly high-strength composite fireproofheat-insulation plate, the inorganic environment-friendly high-strength composite fireproof heat-insulation plate has moderate density, is good in fire resistance and can be quickly solidified and dried under low-temperature conditions, and the construction time for constructing the inorganic environment-friendly high-strength composite fireproof heat-insulation plate in the north in autumns andwinters can be shortened.

The invention discloses a thermosetting compound fluorine-containing polyimide resin and a preparation method thereof, which aim at further improving the heat stability, temperature resistance and cold resistance of materials. The thermosetting compound fluorine-containing polyimide resin is prepared by compounding a component A and a compound B, wherein the mass ratio of the component A to the compound B is 1:(1-4); the component A is bisphenol AF-matrix fluorine-containing polyimide solution with the solid content of 10wt%-20wt%; and the component B is bisphenol AF phenoxy fluorine-containing polyimide solution with the solid content of 10wt%-20wt%. The thermosetting compound fluorine-containing polyimide resin has high dissolubility, heat stability, mechanical properties and melt processing performance. Besides, the preparation method is simple to operate, low in cost and environment-friendly, and can be adapted to the requirements of industrial production.

The invention discloses a large forged high-speed steel cold roll and a manufacturing method thereof. The cold roll comprises the following chemical constituents in percentage by mass: 0.90-1.20% of C, 0.20-1.20% of Si, 0.20-1.00% of Mn, 6.00-12.00% of Cr, 2.00-5.00% of Mo, 1.00-4.00% of V, 0.80-2.00% of W, not greater than 0.80% of Ni, not greater than 0.02% of P, not greater than 0.02% of S, and the balance of Fe and inevitable impurities. The manufacturing method for the cold roll comprises the process steps of steel ingot refining, billet forging, pre-heat treatment, machining, final heat treatment and the like. The surface layer hardness of a roll body of the cold roll manufactured by the manufacturing method disclosed by the invention is 88-98 HSD; the cold roll is excellent in wear resistance, high in roughness holding capacity and high in structure stability. According to the manufacturing process disclosed by the invention, chroming process steps are reduced and production cost is decreased.

The invention discloses a roller sleeve for large forged alloy steel carrying roller and a manufacturing method thereof. The roller sleeve for large forged alloy steel carrying roller comprises following chemical constituents in percentage by mass: 0.40-0.80% of C, 0.20-1.20% of Si, 0.20-1.00% of Mn, 3.00-8.00% of Cr, 0.15-1.50% of Mo, 0.05-0.40% of V, Ni<=0.80%, P<=0.02%, S<=0.02% and the balance of Fe and ineluctable impurities. The manufacturing method for the roller sleeve for large forged alloy steel carrying roller comprises four steps, including refining steel ingot, forging roller sleeve base, pre-heating and machining and final heat treatment. The product of the invention is excellent in anti-contact fatigue performance, abrasion performance and roller shape retention, so that a complex carrying roller can satisfy rolling requirements of high-accuracy plates. According to the invention, the complex carrying roller obviously precedes conventional carrying rollers in contact-fatigue performance, roller shape retention and anti-mechanical and anti-thermal impact performances, and has especially excellent performance when being used as a sleeve for a convexity-changeable complex carrying roller.

The invention provides a novel FPC composite electromagnetic shielding film and a preparation method thereof. The method comprises the following steps: 1) preparing coating materials of a first insulation paint layer, a second insulation paint layer, an electromagnetic wave reflection coating layer and an electromagnetic wave absorbing coating layer; and 2) carrying out coating, wherein the firstinsulation paint layer is a wear-resisting coating, wear resistance being larger than 1000 times; the second insulation paint layer is a high-filling and high-toughness coating, bending resistance times being larger than 80000; the coating material of the electromagnetic wave reflection coating layer comprises reflection layer matrix resin and metal fillers, the metal fillers being flake silver-clad glass or flake silver-clad copper powders or leaf-like silver-clad copper powders or dendritic silver-clad copper powders; the ratio of the matrix resin and the metal fillers of the electromagneticwave reflection coating layer is 1:1.5-1:5; the electromagnetic wave absorbing coating layer comprises absorbing layer matrix resin and wave absorbing materials; the carrier film is a matte release film. The novel FPC composite electromagnetic shielding film has better flexibility, bending resistance, product flatness and shielding effect.