CN111300914A - Preparation method of high-strength low-resistivity composite conductive plastic - Google Patents
Preparation method of high-strength low-resistivity composite conductive plastic Download PDFInfo
- Publication number
- CN111300914A CN111300914A CN201911252043.8A CN201911252043A CN111300914A CN 111300914 A CN111300914 A CN 111300914A CN 201911252043 A CN201911252043 A CN 201911252043A CN 111300914 A CN111300914 A CN 111300914A
- Authority
- CN
- China
- Prior art keywords
- preparation
- plastic
- conductive
- fibers
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/08—Impregnating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/30—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being formed of particles, e.g. chips, granules, powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/507—Polyesters
- D06M15/513—Polycarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/103—Metal fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/02—Synthetic macromolecular particles
- B32B2264/0214—Particles made of materials belonging to B32B27/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/40—Fibres of carbon
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a preparation method of high-strength low-resistivity composite conductive plastic, which is prepared by material selection, conductive fiber carding and needling, plastic matrix impregnation, drying and compression molding. The invention provides a preparation method of high-strength low-resistivity composite conductive plastic, which forms a communicated conductive network by pre-carding and needling conductive fibers, has the characteristics of uniform stress diffusion, good damage stability, good mechanical property and the like when bearing load, particularly enables resin to be uniformly impregnated in the conductive fibers in an ultrasonic mode, greatly improves the conductive performance and the mechanical property of the conductive plastic, does not lose the processability, can be used for manufacturing electronic production equipment, electronic instruments, instrument shells, decorative materials of dust-free production workshops and the like with the requirements of static resistance, electromagnetic wave interference resistance and dust-free, and has wide application prospect.
Description
Technical Field
The invention relates to a preparation method of a high-strength low-resistivity composite conductive plastic, belonging to the technical field of new materials.
Background
Plastics are mainly present and used in the polymer industry in the form of insulator products. With the rapid increase of portable electromagnetic radiation sources such as mobile phones and notebook computers, the demand for lightweight electromagnetic interference shielding materials is increasing, and research on polymer conductive composite materials draws extensive attention in academic and industrial fields, so that the main purposes of developing conductive plastics are to prevent static electricity, electromagnetic interference, radio frequency interference and the like, further prevent accidents, guarantee information safety and save economy.
According to different synthetic raw materials and processing technologies, conductive plastics can be divided into structural types and composite types. The structural conductive plastic is a plastic with conductive performance after macromolecule itself or mixing, and the processing performance of the conductive plastic is poor, and the application is less. The composite conductive plastics can be divided into the following two types according to different preparation methods: 1. the surface treatment method is to form a thin metal layer by applying a conductive coating to the surface of a plastic product by electroplating or chemical plating, etc. to make it conductive, and includes a metal thermal spraying method, a dry plating method, a wet plating method, and a conductive coating method. However, such conductive plastics have disadvantages such as easy peeling and delamination. 2. The filler dispersing and compounding process is one mixing and pelletizing process with synthetic resin with high electric insulating property and other additive with excellent electric conductivity, and is one injection, compression or extrusion molding process. Therefore, the research of the filled conductive composite material is mainly focused at present. For filled conductive plastics, the conductive filler plays a very important role. The conductive filler is classified into metals (silver, copper, nickel), metal oxides (zinc oxide whisker, tin oxide), carbon (carbon black, graphite, carbon fiber, carbon nanotube, graphene), and composite conductive fillers, and the form is mostly fiber or powder. The conductive plastic prepared from the metal conductive filler has the defects of high cost, high rigidity, high density, small application range and the like, and is not suitable for the development requirement of light weight at present. The carbon conductive filler has good conductive performance, but in the preparation process of the conductive plastic, the addition amount of the conductive filler is higher, and although the conductive performance is improved, the mechanical property and the processing property are influenced. For example, chinese patent 200910052384.0 discloses a method for preparing a conductive plastic using recycled plastic as a matrix, which comprises uniformly mixing treated carbon black with a plastic matrix under high-speed stirring, and extruding and granulating to obtain a conductive plastic with a surface resistivity of 105 Ω. However, as can be seen from the results of elongation at break, the conductive plastic is very brittle. The chinese invention patent 201710542098.7 provides an impact-resistant conductive plastic material composed of a resin matrix, a conductive material, a composite fiber material and various additives, but the patent does not provide a specific preparation process. Chinese patent 201810137548.9 discloses a novel conductive plastic preparation process, which comprises the steps of sequentially adding polyamide resin, acrylonitrile-butadiene-styrene terpolymer, conductive additive, impact modifier and coupling agent into a reaction kettle within 4 minutes, dry-mixing for 10-20 minutes, adding the dry-mixed mixture into a feed inlet of a double-screw extruder, extruding into lines, cooling, cutting and granulating, and finally preparing the conductive plastic with tensile strength of 15.8MPa and volume resistivity of 58 omega. In the process of consulting the invention patents, a plurality of patents are found to only give preparation raw materials, and no clear preparation process and conductivity are given, such as Chinese invention patent 201811136792.X, a conductive plastic; chinese patent 201610492316.6, a conductive plastic; chinese patent 201610732752.6, a modified high strength conductive plastic; chinese patent 201610956425.9, a conductive plastic; chinese patent 201710635411.1, a conductive plastic; chinese patent 201711062226.4, a new conductive plastic; chinese patent 201711127214.5, a nylon conductive plastic.
Therefore, new conductive fillers and new conductive plastic preparation processes are currently problems to be solved. The preparation method of the composite conductive plastic with high performance, multiple functions, good processability and low cost needs to be developed, and the composite conductive plastic has good processability, mechanical property, flame retardance, heat resistance and low production cost on the premise of keeping excellent conductive performance and shielding performance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a high-strength low-resistivity composite conductive plastic.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of high-strength low-resistivity composite conductive plastic comprises the following steps:
s1, selecting materials according to the following mass percentage: 10-90% of a plastic matrix, 0.1-2% of an antioxidant and 3-50% of short-cut conductive fibers;
s2, carding and needling the conductive fibers, namely putting the chopped conductive fibers into a cotton mixer for mixing, feeding the mixed fibers into a roller type carding machine for impurity removal, mixing and uniform formation of single fibers, carding the single fibers into thin nets, preparing the thin nets into fiber films by using a cross-folding lapping machine, and repeatedly needling and reinforcing the thin films to obtain the three-dimensional mixed fiber needled felt;
s3, dipping the plastic substrate, treating the plastic substrate by adopting an antioxidant, dissolving the treated plastic substrate in an organic solvent, putting the needled felt into the solution, and treating for 30-180 min under the action of ultrasound to fully dip the needled felt in the plastic substrate;
s4, drying, namely, placing the needled felt of the dipping solution in a blast oven or a vacuum oven to be treated for 30-120 min at 50-120 ℃ until the solvent is completely volatilized;
s5, compression molding, namely putting the needled felt soaked with the plastic matrix obtained in the step S4 into a mold, respectively laying a layer of composite base material on the upper and lower sides of the mold, putting the needled felt soaked with the plastic matrix between two layers of composite base materials to form a composite structure, then putting the composite structure into a flat vulcanizing machine, and carrying out hot press molding through a program-controlled tablet press to obtain the composite conductive plastic.
Preferably, in the step S1, the plastic substrate is one or more of polypropylene (PP), Polyethylene (PE), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), Polysulfone (PSF), Polyphenylene Sulfide (PPs), Polycarbonate (PC), nylon 6(PA6), nylon 66(PA66), Polyetherimide (PEI), Polyoxymethylene (POM), polybutylene terephthalate (PBT), or acrylonitrile-butadiene-styrene (ABS).
Preferably, in the step S1, the organic solvent is one or more of acetone, methanol, ethanol, N-butanol, dichloromethane, chloroform, carbon tetrachloride, toluene, xylene, dimethyl sulfoxide, or N, N-dimethylformamide.
Preferably, in step S1, the chopped conductive fibers are nickel-plated carbon fibers, copper fibers, silver fibers, or stainless steel fibers.
Preferably, the nickel-plated carbon fiber has a length of 2 to 6mm and a diameter of 6 to 10 μm,
the copper fiber has a length of 3 to 10mm and a diameter of 30 to 80 μm,
the silver fiber has a length of 2 to 10mm and a diameter of 30 to 60 μm,
the stainless steel fiber has a length of 4-6 mm and a diameter of 5-15 μm.
Preferably, in the step S2, the frequency of a corner nail curtain of the cotton blender is 5-20 Hz, and the frequency of a feeder of the carding machine is 5-20 Hz; the upper curtain frequency of the lapping machine is 10-40 Hz, the lower curtain frequency of the lapping machine is 20-35 Hz, and the T curtain frequency of the lapping machine is 1-25 Hz; the needling frequency is 10-50 Hz, the pre-feeding frequency is 10-30 Hz, the pre-discharging frequency is 10-30 Hz, the main needling depth is 1-10 mm, and the cloth needle density of the main needling machine is 2000 pieces/m.
Preferably, in step S3, the ultrasonic power is 300W.
Preferably, in the step S5, the mold pressing temperature is 100-280 ℃, the mold pressing pressure is 1-10 MPa, and the mold pressing time is 5-60 min.
The invention has the following beneficial effects:
1. the short-cut conductive fibers are prepared into the three-dimensional hybrid fiber needled felt by adopting a method combining carding and needling, the prepared needled felt has uniform mechanical property and high interlayer mechanical property, and the conductivity of the plastic matrix can be effectively improved by mixing the short-cut conductive fibers with the plastic matrix. In particular, the needling method is a mechanical net fixing method, compared with a spunlace process and a wet process, the needling technology is beneficial to reducing environmental pollution, has simple process and strong designability, can prepare various large-size and complex-shaped prefabricated bodies, and is very suitable for large-scale batch production.
2. The dissolved plastic matrix is fully soaked in the needled felt by an ultrasonic method, so that the conductive fibers can form an even heat-conducting network structure, and meanwhile, the plastic matrix can be uniformly arranged among the heat-conducting network structures formed by the conductive fibers, and the electric conduction effect of the conductive plastic is further improved.
3. The novel high-strength and low-resistivity composite conductive plastic is prepared by adopting high-temperature and high-pressure die pressing, a layer of plastic matrix powder is respectively paved in a die up and down, the needle-punched conductive fiber impregnated with the plastic matrix is placed in the middle to form a composite structure, and the plastic matrix is further impregnated in the conductive fiber in a melting manner in the high-temperature and high-pressure die pressing process, so that the plastic matrix and the conductive fiber are uniformly distributed, and the novel high-strength and low-resistivity composite conductive plastic is more effective than the commonly adopted modes of banburying, blending and the like.
Detailed Description
The invention provides a preparation method of a high-strength low-resistivity composite conductive plastic. The technical solutions of the present invention are described in detail below to make them easier to understand and master.
A preparation method of high-strength low-resistivity composite conductive plastic comprises the following steps:
s1, selecting materials according to the following mass percentage: 10-90% of a plastic matrix, 0.1-2% of an antioxidant and 3-50% of short-cut conductive fibers;
s2, carding and needling the conductive fibers, namely putting the chopped conductive fibers into a cotton mixer for mixing, feeding the mixed fibers into a roller type carding machine for impurity removal, mixing and uniform formation of single fibers, carding the single fibers into thin nets, preparing the thin nets into fiber films by using a cross-folding lapping machine, and repeatedly needling and reinforcing the thin films to obtain the three-dimensional mixed fiber needled felt;
s3, dipping the plastic substrate, treating the plastic substrate by adopting an antioxidant, dissolving the treated plastic substrate in an organic solvent, putting the needled felt into the solution, and treating for 30-180 min under the action of ultrasonic waves with the ultrasonic power of 300W to fully dip the needled felt in the plastic substrate;
s4, drying, namely, placing the needled felt of the dipping solution in a blast oven or a vacuum oven to be treated for 30-120 min at 50-120 ℃ until the solvent is completely volatilized;
s5, compression molding, namely putting the needled felt soaked with the plastic matrix obtained in the step S4 into a mold, respectively laying a layer of composite base material on the upper and lower sides of the mold, putting the needled felt soaked with the plastic matrix between two layers of composite base materials to form a composite structure, then putting the composite structure into a flat vulcanizing machine, and carrying out hot press molding through a program-controlled tablet press to obtain the composite conductive plastic.
The plastic substrate is one or a combination of polypropylene (PP), Polyethylene (PE), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), Polysulfone (PSF), polyphenylene sulfide (PPS), Polycarbonate (PC), nylon 6(PA6), nylon 66(PA66), Polyetherimide (PEI), Polyformaldehyde (POM), polybutylene terephthalate (PBT) or acrylonitrile-butadiene-styrene (ABS).
The organic solvent is one or more of acetone, methanol, ethanol, N-butanol, dichloromethane, chloroform, carbon tetrachloride, toluene, xylene, dimethyl sulfoxide or N, N-dimethylformamide.
The short-cut conductive fiber is one or the combination of more of nickel-plated carbon fiber, copper fiber, silver fiber and stainless steel fiber. The nickel-plated carbon fiber has a length of 2-6 mm and a diameter of 6-10 μm, the copper fiber has a length of 3-10 mm and a diameter of 30-80 μm, the silver fiber has a length of 2-10 mm and a diameter of 30-60 μm, and the stainless steel fiber has a length of 4-6 mm and a diameter of 5-15 μm.
The frequency of a fillet nail curtain of the cotton mixer is 5-20 Hz, and the frequency of a feeder of the carding machine is 5-20 Hz; the upper curtain frequency of the lapping machine is 10-40 Hz, the lower curtain frequency of the lapping machine is 20-35 Hz, and the T curtain frequency of the lapping machine is 1-25 Hz; the needling frequency is 10-50 Hz, the pre-feeding frequency is 10-30 Hz, the pre-discharging frequency is 10-30 Hz, the main needling depth is 1-10 mm, and the cloth needle density of the main needling machine is 2000 pieces/m.
The mould pressing temperature is 100-280 ℃, the mould pressing pressure is 1-10 MPa, and the mould pressing time is 5-60 min.
Example 1
A preparation method of high-strength low-resistivity composite conductive plastic comprises the following components in percentage by mass: 90 percent; antioxidant: 0.5 percent; short-cut conductive fibers: 30 percent.
Firstly, putting short-cut conductive copper fibers (the length and the diameter are respectively 10mm and 50 mu m) into a cotton mixer for mixing, feeding the mixed fibers into a roller type carding machine for impurity removal, mixing and uniform formation of single fibers, and carding the single fibers into a thin net; using a cross-folding lapping machine to make the thin net into a fiber film, further repeatedly needling and reinforcing the fiber film to obtain a three-dimensional hybrid fiber needled felt, and cutting the three-dimensional hybrid fiber needled felt into a shapeIs a nickel-plated carbon fiber needled felt with the length of 5cm and the width of 5 cm. Wherein, the frequency of the brad curtain of the cotton blender is 15Hz, and the frequency of the feeder of the carding machine is 10 Hz; the upper curtain frequency of the lapping machine is 20Hz, the lower curtain frequency of the lapping machine is 25Hz, and the T curtain frequency of the lapping machine is 15 Hz; the needling frequency is 25Hz, the pre-feeding frequency is 20Hz, the pre-discharging frequency is 15Hz, the main needling depth is 5mm, and the cloth needle density of the main needling machine is 2000 pieces/m. Secondly, butylated cresol is adopted to treat polycarbonate, the treated plastic matrix is dissolved in dichloromethane and treated for 60min under the action of ultrasound, so that the plastic matrix is fully impregnated into the needled felt, and the ultrasound power is 300W. Then, the needled felt impregnated with the resin solution was placed in a vacuum oven (vacuum degree 0.095) and treated at 60 ℃ for 100min until the solvent was completely volatilized. And finally, putting the needled felt soaked with the plastic matrix into a mould, respectively laying a layer of polycarbonate powder on the upper part and the lower part of the mould, putting the needled felt soaked with the plastic matrix between two layers of powder to form a composite structure, then putting the composite structure into a flat vulcanizing machine, and performing hot press molding through a program-controlled tablet press to obtain the novel composite conductive plastic. Wherein the mould pressing temperature is 260 ℃, the mould pressing pressure is 5MPa, and the mould pressing time is 30 min. And after the grinding tool is naturally cooled to room temperature, taking out the sample to obtain the novel high-strength low-resistivity composite conductive plastic. The volume resistivity of the conductive plastic is 10-2Omega cm, tensile strength of 100 +/-1.7 MPa, tensile modulus of 3.0GPa and elongation at break of 25%.
Example 2
A preparation method of novel high-strength low-resistivity composite conductive plastic comprises the following components in percentage by mass: 85 percent; antioxidant: 1.0 percent; short-cut conductive fibers: 25 percent.
Firstly, putting short-cut conductive nickel-plated carbon fibers (the length and the diameter are respectively 6mm and 10 mu m) into a cotton mixer for mixing, feeding the mixed fibers into a roller type carding machine for impurity removal, mixing and uniform formation of single fibers, and carding the single fibers into a thin net; using cross-folding lapping machine to make thin net into fiber film, further repeatedly needling and reinforcing to obtain three-dimensional hybrid fiber needled felt, and cutting into shapeThe nickel-plated carbon fiber needled felt is 5cm long and 5cm wide. Wherein, the frequency of the brad curtain of the cotton blender is 20Hz, and the frequency of the feeder of the carding machine is 20 Hz; the upper curtain frequency of the lapping machine is 15Hz, the lower curtain frequency of the lapping machine is 20Hz, and the T curtain frequency of the lapping machine is 15 Hz; the needling frequency is 25Hz, the pre-feeding frequency is 20Hz, the pre-discharging frequency is 10Hz, the main needling depth is 10mm, and the cloth needle density of the main needling machine is 2000 pieces/m. Secondly, treating nylon 6 by adopting N, N-diphenyl-p-phenylenediamine, dissolving the treated nylon 6 in a mixed solvent of dimethylbenzene and N-butyl alcohol, and treating for 100min under the action of ultrasonic waves to ensure that the needled felt is fully impregnated by the nylon 6, wherein the ultrasonic power is 300W. Then, the needled felt impregnated with the resin solution was placed in a vacuum oven (vacuum degree 0.095) and treated at 80 ℃ for 100min until the solvent was completely volatilized. And finally, putting the needled felt soaked with the plastic matrix into a mould, laying a layer of nylon 6 on the upper part and the lower part of the mould, putting the needled felt soaked with the plastic matrix between two layers of powder to form a composite structure, putting the composite structure into a flat vulcanizing machine, and performing hot press molding through a program-controlled tablet press to obtain the novel composite conductive plastic. Wherein the mould pressing temperature is 240 ℃, the mould pressing pressure is 3MPa, and the mould pressing time is 60 min. And after the grinding tool is naturally cooled to room temperature, taking out the sample to obtain the novel high-strength low-resistivity composite conductive plastic. The volume resistivity of the conductive plastic is 3.52 multiplied by 10-2Omega cm, tensile strength of 85 +/-2.5 MPa, tensile modulus of 3.5GPa and elongation at break of 65%.
Example 3
A preparation method of novel high-strength low-resistivity composite conductive plastic comprises the following components in percentage by mass: 80 percent; antioxidant: 0.5 percent; short-cut conductive fibers: 10 percent.
Firstly, putting short-cut conductive silver fibers (the length and the diameter are respectively 5mm and 50 mu m) into a cotton mixer for mixing, feeding the mixed fibers into a roller type carding machine for impurity removal, mixing and uniform formation of single fibers, and carding the single fibers into a thin net; using a cross-folding lapping machine to make the thin net into a fiber film, further repeatedly needling and reinforcing the fiber film to obtain a three-dimensional hybrid fiber needled felt, and cutting the three-dimensional hybrid fiber needled felt into a three-dimensional hybrid fiber needled feltThe shape is a silver fiber needled felt with the length of 5cm and the width of 5 cm. Wherein, the frequency of the brad curtain of the cotton blender is 20Hz, and the frequency of the feeder of the carding machine is 25 Hz; the upper curtain frequency of the lapping machine is 35Hz, the lower curtain frequency of the lapping machine is 30Hz, and the T curtain frequency of the lapping machine is 20 Hz; the needling frequency is 20Hz, the pre-feeding frequency is 25Hz, the pre-discharging frequency is 15Hz, the main needling depth is 5mm, and the cloth needle density of the main needling machine is 2000 pieces/m. Secondly, treating the mixture of acrylonitrile-butadiene-styrene and polycarbonate by using triphosphite, dissolving the treated plastic matrix in a mixed solvent of toluene and dichloromethane, and treating for 100min under the action of ultrasonic waves, so that the plastic matrix is fully impregnated into the needled felt, wherein the ultrasonic power is 300W. Then, the needled felt impregnated with the resin solution was placed in a forced air oven at 80 ℃ for 100min until the solvent was completely volatilized. And finally, putting the needled felt soaked with the plastic matrix into a mould, respectively laying a layer of plastic matrix on the upper part and the lower part of the mould, putting the needled felt soaked with the plastic matrix between two layers of powder to form a composite structure, then putting the composite structure into a flat vulcanizing machine, and carrying out hot press molding through a program-controlled tablet press to obtain the novel composite conductive plastic. Wherein the mould pressing temperature is 265 ℃, the mould pressing pressure is 5MPa, and the mould pressing time is 60 min. And after the grinding tool is naturally cooled to room temperature, taking out the sample to obtain the novel high-strength low-resistivity composite conductive plastic. The volume resistivity of the conductive plastic is 0.02 multiplied by 10-2Omega cm, tensile strength of 80.6 +/-0.8 MPa, tensile modulus of 2.25GPa and elongation at break of 40%.
Example 4
A preparation method of novel high-strength low-resistivity composite conductive plastic comprises the following components in percentage by mass: 75 percent; antioxidant: 0.5 percent; short-cut conductive fibers: 30 percent.
Firstly, short-cut stainless steel fiber (the length and the diameter are respectively 5mm and 15 mu m) is put into a cotton mixer to be mixed, mixed fiber is fed into a roller type carding machine to be subjected to impurity removal, mixing and uniform formation into single fiber shape, and then the single fiber shape is carded into a thin net; using a cross-folding lapping machine to make the thin net into a fiber film, and further repeatedly needling and reinforcing the fiber film to obtain the fiber filmThe three-dimensional hybrid fiber needled felt is cut into a shape of a stainless steel fiber needled felt with a length of 5cm and a width of 5 cm. Wherein, the frequency of the brad curtain of the cotton blender is 15Hz, and the frequency of the feeder of the carding machine is 25 Hz; the upper curtain frequency of the lapping machine is 30Hz, the lower curtain frequency of the lapping machine is 25Hz, and the T curtain frequency of the lapping machine is 25 Hz; the needling frequency is 40Hz, the pre-feeding frequency is 20Hz, the pre-discharging frequency is 20Hz, the main needling depth is 5mm, and the cloth needle density of the main needling machine is 2000 pieces/m. Secondly, the mixture of polyethylene terephthalate and nylon 66 is processed by butylated cresol, the processed plastic matrix is dissolved in the mixed solvent of xylene and chloroform, and the mixture is processed for 120min under the action of ultrasound, so that the plastic matrix is fully impregnated into the needled felt, and the ultrasound power is 300W. Then, the needled felt impregnated with the resin solution was placed in a vacuum oven (vacuum degree 0.095) at 100 ℃ for 100min until the solvent was completely volatilized. And finally, putting the needled felt soaked with the plastic matrix into a mould, respectively laying a layer of plastic matrix on the upper part and the lower part of the mould, putting the needled felt soaked with the plastic matrix between two layers of powder to form a composite structure, then putting the composite structure into a flat vulcanizing machine, and carrying out hot press molding through a program-controlled tablet press to obtain the novel composite conductive plastic. Wherein the mould pressing temperature is 250 ℃, the mould pressing pressure is 3MPa, and the mould pressing time is 65 min. And after the grinding tool is naturally cooled to room temperature, taking out the sample to obtain the novel high-strength low-resistivity composite conductive plastic. The volume resistivity of the conductive plastic is 5.68 multiplied by 10-2Omega cm, a tensile strength of 130.4 +/-1.2 MPa, a tensile modulus of 3.34GPa and an elongation at break of 10 percent.
Example 5
A preparation method of novel high-strength low-resistivity composite conductive plastic comprises the following components in percentage by mass: 90 percent; antioxidant: 1.0 percent; short-cut conductive fibers: 25 percent.
Firstly, putting short-cut copper fibers (the length and the diameter are respectively 6mm and 60 mu m) into a cotton mixer for mixing, feeding the mixed fibers into a roller type carding machine for impurity removal, mixing and uniform formation of single fibers, and carding the single fibers into a thin net; making thin webs by cross-folding lapping machinesForming a fiber film, further repeatedly needling and reinforcing the fiber film to obtain a three-dimensional hybrid fiber needled felt, and cutting the three-dimensional hybrid fiber needled felt into a copper fiber needled felt with the shape of 5cm in length and 5cm in width. Wherein, the frequency of the brad curtain of the cotton blender is 20Hz, and the frequency of the feeder of the carding machine is 25 Hz; the upper curtain frequency of the lapping machine is 30Hz, the lower curtain frequency of the lapping machine is 25Hz, and the T curtain frequency of the lapping machine is 25 Hz; the needling frequency is 40Hz, the pre-feeding frequency is 25Hz, the pre-discharging frequency is 25Hz, the main needling depth is 10mm, and the cloth needle density of the main needling machine is 2000 pieces/m. Secondly, treating the mixture of polybutylene terephthalate and polyphenylene sulfide by using triphosphite, dissolving the treated plastic matrix in a mixed solvent of xylene and chloroform, and treating for 100min under the action of ultrasound to ensure that the plastic matrix is fully impregnated into the needled felt, wherein the ultrasound power is 300W. Then, the needled felt impregnated with the resin solution was placed in a forced air oven at 100 ℃ for 120min until the solvent was completely volatilized. And finally, putting the needled felt soaked with the plastic matrix into a mould, respectively laying a layer of plastic matrix on the upper part and the lower part of the mould, putting the needled felt soaked with the plastic matrix between two layers of powder to form a composite structure, then putting the composite structure into a flat vulcanizing machine, and carrying out hot press molding through a program-controlled tablet press to obtain the novel composite conductive plastic. Wherein the mould pressing temperature is 280 ℃, the mould pressing pressure is 6MPa, and the mould pressing time is 60 min. And after the grinding tool is naturally cooled to room temperature, taking out the sample to obtain the novel high-strength low-resistivity composite conductive plastic. The volume resistivity of the conductive plastic is 2.58 multiplied by 10-2Omega cm, tensile strength of 120.5 +/-2.4 MPa, tensile modulus of 3.62GPa and elongation at break of 30%.
Through the above description, the invention provides a preparation method of a novel high-strength low-resistivity composite conductive plastic, which forms a communicated conductive network by pre-carding and needling conductive fibers, and has the characteristics of uniform stress diffusion, good destructive stability, good mechanical property and the like when bearing load, particularly, resin is uniformly impregnated in the conductive fibers in an ultrasonic mode, so that the conductive performance and the mechanical property of the conductive plastic are greatly improved, the processability of the conductive plastic is not lost, and the conductive plastic can be used for manufacturing electronic production equipment, electronic instruments, instrument shells, decorative materials of dust-free production workshops and the like with the requirements of static resistance, electromagnetic wave interference resistance and dust-free, and has wide application prospects.
The technical solutions of the present invention are fully described above, it should be noted that the specific embodiments of the present invention are not limited by the above description, and all technical solutions formed by equivalent or equivalent changes in structure, method, or function according to the spirit of the present invention by those skilled in the art are within the scope of the present invention.
Claims (8)
1. The preparation method of the high-strength low-resistivity composite conductive plastic is characterized by comprising the following steps of:
s1, selecting materials according to the following mass percentage: 10-90% of a plastic matrix, 0.1-2% of an antioxidant and 3-50% of short-cut conductive fibers;
s2, carding and needling the conductive fibers, namely putting the chopped conductive fibers into a cotton mixer for mixing, feeding the mixed fibers into a roller type carding machine for impurity removal, mixing and uniform formation of single fibers, carding the single fibers into thin nets, preparing the thin nets into fiber films by using a cross-folding lapping machine, and repeatedly needling and reinforcing the thin films to obtain the three-dimensional mixed fiber needled felt;
s3, dipping the plastic substrate, treating the plastic substrate by adopting an antioxidant, dissolving the treated plastic substrate in an organic solvent, putting the needled felt into the solution, and treating for 30-180 min under the action of ultrasound to fully dip the needled felt in the plastic substrate;
s4, drying, namely, placing the needled felt of the dipping solution in a blast oven or a vacuum oven to be treated for 30-120 min at 50-120 ℃ until the solvent is completely volatilized;
s5, compression molding, namely putting the needled felt soaked with the plastic matrix obtained in the step S4 into a mold, respectively laying a layer of composite base material on the upper and lower sides of the mold, putting the needled felt soaked with the plastic matrix between two layers of composite base materials to form a composite structure, then putting the composite structure into a flat vulcanizing machine, and carrying out hot press molding through a program-controlled tablet press to obtain the composite conductive plastic.
2. The preparation method of the high-strength low-resistivity composite conductive plastic as claimed in claim 1, wherein the preparation method comprises the following steps:
in the step S1, the plastic substrate is one or more of polypropylene (PP), Polyethylene (PE), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), Polysulfone (PSF), Polyphenylene Sulfide (PPs), Polycarbonate (PC), nylon 6(PA6), nylon 66(PA66), Polyetherimide (PEI), Polyoxymethylene (POM), polybutylene terephthalate (PBT), or acrylonitrile-butadiene-styrene (ABS).
3. The preparation method of the high-strength low-resistivity composite conductive plastic as claimed in claim 1, wherein the preparation method comprises the following steps:
in the step S1, the organic solvent is one or more of acetone, methanol, ethanol, N-butanol, dichloromethane, chloroform, carbon tetrachloride, toluene, xylene, dimethyl sulfoxide, and N, N-dimethylformamide.
4. The preparation method of the high-strength low-resistivity composite conductive plastic as claimed in claim 1, wherein the preparation method comprises the following steps:
in the step S1, the chopped conductive fibers are one or a combination of nickel-plated carbon fibers, copper fibers, silver fibers and stainless steel fibers.
5. The preparation method of the high-strength low-resistivity composite conductive plastic as claimed in claim 4, wherein the preparation method comprises the following steps:
the nickel-plated carbon fiber has a length of 2 to 6mm and a diameter of 6 to 10 μm,
the copper fiber has a length of 3 to 10mm and a diameter of 30 to 80 μm,
the silver fiber has a length of 2 to 10mm and a diameter of 30 to 60 μm,
the stainless steel fiber has a length of 4-6 mm and a diameter of 5-15 μm.
6. The preparation method of the high-strength low-resistivity composite conductive plastic as claimed in claim 1, wherein the preparation method comprises the following steps:
in the step S2, the frequency of a fillet nail curtain of the cotton mixing machine is 5-20 Hz, and the frequency of a feeder of the carding machine is 5-20 Hz; the upper curtain frequency of the lapping machine is 10-40 Hz, the lower curtain frequency of the lapping machine is 20-35 Hz, and the T curtain frequency of the lapping machine is 1-25 Hz; the needling frequency is 10-50 Hz, the pre-feeding frequency is 10-30 Hz, the pre-discharging frequency is 10-30 Hz, the main needling depth is 1-10 mm, and the cloth needle density of the main needling machine is 2000 pieces/m.
7. The preparation method of the high-strength low-resistivity composite conductive plastic as claimed in claim 1, wherein the preparation method comprises the following steps:
in step S3, the ultrasonic power is 300W.
8. The preparation method of the high-strength low-resistivity composite conductive plastic as claimed in claim 1, wherein the preparation method comprises the following steps:
in the step S5, the mold pressing temperature is 100-280 ℃, the mold pressing pressure is 1-10 MPa, and the mold pressing time is 5-60 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252043.8A CN111300914A (en) | 2019-12-09 | 2019-12-09 | Preparation method of high-strength low-resistivity composite conductive plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252043.8A CN111300914A (en) | 2019-12-09 | 2019-12-09 | Preparation method of high-strength low-resistivity composite conductive plastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111300914A true CN111300914A (en) | 2020-06-19 |
Family
ID=71156188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911252043.8A Pending CN111300914A (en) | 2019-12-09 | 2019-12-09 | Preparation method of high-strength low-resistivity composite conductive plastic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111300914A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161030A (en) * | 2011-12-19 | 2013-06-19 | 江南大学 | Preparation method of antistatic fibrofelt |
| CN206561655U (en) * | 2017-01-16 | 2017-10-17 | 华南理工大学 | A kind of chopped carbon fiber electromagnetic shielding composite material |
| CN107558002A (en) * | 2017-10-24 | 2018-01-09 | 武汉纺织大学 | A kind of method for improving carbon fiber felt feed increcement |
| CN109954320A (en) * | 2019-04-29 | 2019-07-02 | 江苏喜洋洋环保设备科技有限公司 | A kind of preparation process of antistatic basalt Nomex |
| CN111424421A (en) * | 2020-05-08 | 2020-07-17 | 杭州幄肯新材料科技有限公司 | Carbon fiber composite felt and method for enhancing heat conduction and electric conduction performance of polymer composite material |
-
2019
- 2019-12-09 CN CN201911252043.8A patent/CN111300914A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161030A (en) * | 2011-12-19 | 2013-06-19 | 江南大学 | Preparation method of antistatic fibrofelt |
| CN206561655U (en) * | 2017-01-16 | 2017-10-17 | 华南理工大学 | A kind of chopped carbon fiber electromagnetic shielding composite material |
| CN107558002A (en) * | 2017-10-24 | 2018-01-09 | 武汉纺织大学 | A kind of method for improving carbon fiber felt feed increcement |
| CN109954320A (en) * | 2019-04-29 | 2019-07-02 | 江苏喜洋洋环保设备科技有限公司 | A kind of preparation process of antistatic basalt Nomex |
| CN111424421A (en) * | 2020-05-08 | 2020-07-17 | 杭州幄肯新材料科技有限公司 | Carbon fiber composite felt and method for enhancing heat conduction and electric conduction performance of polymer composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104845361B (en) | Chopped carbon fiber, conductive nano carbon black/graphene collaboration strengthen highly conductive thermoplastic and preparation method thereof | |
| CN101812773B (en) | Composite material for automobile interior part and production method thereof | |
| US20130192434A1 (en) | Method for producing carbon fiber aggregate, and method for producing carbon fiber-reinforced plastic | |
| CN105200547A (en) | Preparation method of graphene-polyester nano-composite fiber | |
| CN102963079B (en) | Automotive trim fiber composite felt, composite fiber plate, and preparation method thereof | |
| KR100921114B1 (en) | Preparation method of Poly lactic acid/natural fiber composites | |
| JP2016527704A (en) | Method for producing electromagnetic wave shielding composite material using copper and nickel plated carbon fiber produced by electroless and continuous electrolytic process and electromagnetic wave shielding composite material | |
| CN103950251A (en) | Formula and preparation technology of light fiber-reinforced thermoplastic resin composite sheet material with high flame resistance | |
| CN103088551A (en) | Light bastose and flame-retardant polypropylene fiber composite board and method for manufacturing same | |
| JP2013245328A (en) | Fiber-reinforced resin pellet, method for producing the same, and fiber-reinforced molded resin article | |
| CN102797110A (en) | Preparation method for thermal compression jute reinforced composite | |
| Sun et al. | Research progress and application of natural fiber composites | |
| CN111300914A (en) | Preparation method of high-strength low-resistivity composite conductive plastic | |
| CN103358627B (en) | High performance fiber layer composite board and preparation method thereof | |
| CN104177827B (en) | A kind of PSA fiber base carbon fibre strengthens composite and preparation method thereof | |
| JP6586773B2 (en) | Compact | |
| CN104710765B (en) | The high-performance heat conductive insulating PC/ABS Alloy And Preparation Method prepared by waste electrical equipment shell | |
| CN110951244A (en) | Waste plastic regeneration enhanced recycled carbon fiber thermoplastic composite material and preparation method thereof | |
| CN116103838A (en) | Regenerated carbon fiber/thermoplastic fiber mixed felt and preparation method thereof | |
| CN114567941B (en) | Method for preparing electrothermal heating sheet by utilizing carbon fiber braided fabric leftover materials | |
| US11945931B1 (en) | Recyclable nano composite as well as preparation method and application thereof | |
| JP7267466B2 (en) | COLD-PRESS MOLDED PRODUCT CONTAINING CARBON FIBER AND GLASS FIBER, AND METHOD FOR MANUFACTURING THE SAME | |
| JP2016215484A (en) | Fiber-reinforced plastic molded body, and base material for fiber-reinforced plastic molded body | |
| JP6439487B2 (en) | Substrate for fiber reinforced plastic molding and fiber reinforced plastic molding | |
| CN110757677B (en) | Shielding material containing hard conductive sponge structure and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200619 |
|
| RJ01 | Rejection of invention patent application after publication |