CN113059867A - Carbon fiber structural member and preparation method thereof - Google Patents
Carbon fiber structural member and preparation method thereof Download PDFInfo
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- CN113059867A CN113059867A CN202110327156.0A CN202110327156A CN113059867A CN 113059867 A CN113059867 A CN 113059867A CN 202110327156 A CN202110327156 A CN 202110327156A CN 113059867 A CN113059867 A CN 113059867A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- 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
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- 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
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- 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
- B32B5/024—Woven fabric
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- 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
- B32B5/26—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 another layer next to it also being fibrous or filamentary
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- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
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- 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
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- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/28—Glass
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- 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
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
- B32B2037/243—Coating
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- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
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- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- 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
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Abstract
The invention relates to the technical field of carbon fiber structural member preparation, in particular to a carbon fiber structural member and a preparation method thereof, and the carbon fiber structural member is characterized by comprising a 3K woven fabric layer, a satin fabric layer, a unidirectional carbon fiber fabric layer and a resin layer, wherein the 3K woven fabric layer is arranged on an outer layer, the satin fabric layer is arranged on a middle layer, the unidirectional carbon fiber fabric layer is arranged on an inner layer, and the 3K woven fabric layer, the satin fabric layer and the unidirectional carbon fiber fabric layer are sequentially stacked and then are subjected to composite forming through the resin layer, and the preparation method: (1) preparing a mold for the carbon fiber structural member; (2) preparing a modified resin; (3) the carbon fiber structural member is prepared by adopting the structure and the preparation method, and has the advantages of simple process, high product qualification rate, reduced production cost, reduced labor quantity and the like.
Description
Technical Field
The invention relates to the technical field of carbon fiber structural member preparation, in particular to a carbon fiber structural member and a preparation method thereof, wherein the carbon fiber structural member has the advantages of simple process, high product qualification rate, reduced production cost and reduced labor quantity.
Background
As is well known, carbon fiber products are gradually accepted and accepted by consumers due to their characteristics of high strength, light weight, etc. The forming of the carbon fiber structural part at present mainly comprises modes such as mould pressing, pressure tank and the like, and the main process method comprises the following steps: and winding the carbon fiber cloth on a mold core, filling the carbon fiber cloth into a forming mold, and solidifying the carbon fiber under the action of resin, temperature and pressure to form the structural member. The main raw material that the carbon fiber structure adopted is carbon fiber prepreg, and carbon fiber prepreg's formation is accomplished through the warp and weft knitting, and the carbon fiber cloth itself that makes like this will porose, multiple condition such as hole appear. The carbon fiber structural member is influenced by the defects of the raw materials in the forming process, the conditions of material shortage, concave holes, eyes and the like can appear on the surface of the formed product, and certain influence can be caused on the appearance and the strength of the structural member. The later stage will be through the manual work sand blasting, polish, repair, processing such as spraying, take a lot of work, hard, and efficiency is underground, because the particularity of structure, can only be through cutting into the segment with the carbon filament, and the small proportion is mixed and is formed through moulding plastics in the nylon material, and its finished product transmission nature is poor, and the result of use is not good, is the fashioned very big technological problem of restriction carbon fiber structure. And is one of the reasons for the high price of carbon fiber products.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the carbon fiber structural part and the preparation method, which have the advantages of simple process, high product qualification rate, reduced production cost and reduced labor quantity.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the carbon fiber structural member is characterized by comprising a 3K woven fabric layer, a satin fabric layer, a one-way carbon fiber fabric layer and a resin layer, wherein the 3K woven fabric layer is arranged on the outer layer, the satin fabric layer is arranged on the middle layer, the one-way carbon fiber fabric layer is arranged on the inner layer, and the 3K woven fabric layer, the satin fabric layer and the one-way carbon fiber fabric layer are sequentially stacked and then subjected to resin layer composite forming.
The preparation method of the carbon fiber structural member is characterized by comprising the following steps:
(1) preparing a mould of the carbon fiber structural member, wherein the mould is divided into an upper mould, a lower mould and a core rod, grooves in the shape of the structural member are formed in the end surfaces of the upper mould and the lower mould, and a forming cavity of the structural member is formed between the grooves of the upper mould and the lower mould and the core rod;
(2) preparing a modified resin: taking epoxy resin, carbon black, a curing agent, fumed silica and hollow glass beads, wherein the epoxy resin, the carbon black, the curing agent, the fumed silica and the hollow glass beads are in parts by weight: 40-50 parts of epoxy resin, 38-45 parts of curing agent, 1-2 parts of carbon black, 3-6 parts of fumed silica and 5-10 parts of hollow glass beads, wherein 40-50 parts of epoxy resin is taken firstly, then 1-2 parts of carbon black is added into the epoxy resin and uniformly stirred, then 3-6 parts of fumed silica is added into the epoxy resin mixed with the carbon black and uniformly stirred, after uniform stirring, 5-10 parts of hollow glass beads are added and then stirred, after stirring is finished, initial modified resin is formed, 38-45 parts of curing agent is added when the initial modified resin needs to be used and stirred to form modified resin;
(3) preparing a carbon fiber structural member: firstly, mixing initial modified resin with a curing agent according to the step in the step (2) to form modified resin, then taking 3K woven cloth, satin cloth and unidirectional carbon fiber cloth, firstly laying a layer of 3K woven cloth in grooves of an upper die and a lower die in the step (1), then laying a layer of satin cloth above the 3K woven cloth, then winding the unidirectional carbon fiber cloth on a core rod, then taking the modified resin to coat the modified resin above the satin cloth, then installing the core rod wound with the unidirectional carbon fiber cloth in the upper die and the lower die, closing the dies, putting the dies into a press to perform high-temperature pressing after closing the dies, cooling and then unloading the dies to form.
The density of the hollow glass microspheres in the step (2) is 0.125-0.2g/cm3。
The pressing process in the pressing machine in the step (3) comprises the following steps: controlling the initial temperature at 130 ℃ and the pressure at 5MPa, releasing pressure for 1 second after 30 seconds, exhausting gas, closing the mold, controlling the temperature at 150 ℃ and the pressure at 10 MPa, maintaining the pressure and reducing the temperature after 10 minutes, and unloading the mold after cooling for molding.
The content of the modified resin in the step (3) is 10% of the total weight of carbon filaments in the 3K woven cloth, the satin cloth and the unidirectional carbon fiber cloth.
By adopting the structure and the preparation method, the invention has the advantages of simple process, high product qualification rate, reduced production cost, reduced labor quantity and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in the attached drawings, the carbon fiber structural member is characterized by comprising a 3K woven fabric layer 1, a satin fabric layer 2, a one-way carbon fiber fabric layer 3 and a resin layer, wherein the 3K woven fabric layer 1 is arranged on the outer layer, the satin fabric layer 2 is arranged on the middle layer, the one-way carbon fiber fabric layer 3 is arranged on the inner layer, the 3K woven fabric layer 1, the satin fabric layer 2 and the one-way carbon fiber fabric layer 3 are sequentially stacked and then are subjected to resin layer composite forming, and the preparation method comprises the following steps:
(1) preparing a mould of the carbon fiber structural member, wherein the mould is divided into an upper mould, a lower mould and a core rod, grooves in the shape of the structural member are formed in the end surfaces of the upper mould and the lower mould, and a forming cavity of the structural member is formed between the grooves of the upper mould and the lower mould and the core rod;
(2) preparing a modified resin: taking epoxy resin, carbon black, a curing agent, fumed silica and hollow glass beads, wherein the epoxy resin, the carbon black, the curing agent, the fumed silica and the hollow glass beads are in parts by weight: 40-50 parts of epoxy resin, 38-45 parts of curing agent, 1-2 parts of carbon black, 3-6 parts of fumed silica and 5-10 parts of hollow glass beads, wherein 40-50 parts of epoxy resin is taken firstly, then 1-2 parts of carbon black is added into the epoxy resin and uniformly stirred, then 3-6 parts of fumed silica is added into the epoxy resin mixed with the carbon black and uniformly stirred, after uniform stirring, 5-10 parts of hollow glass beads are added and then stirred, after stirring is finished, initial modified resin is formed, 38-45 parts of curing agent is added when the initial modified resin needs to be used and stirred to form modified resin;
(3) preparing a carbon fiber structural member: firstly, mixing initial modified resin with a curing agent according to the step in the step (2) to form modified resin, then taking 3K woven cloth, satin cloth and unidirectional carbon fiber cloth, firstly laying a layer of 3K woven cloth in grooves of an upper die and a lower die in the step (1), then laying a layer of satin cloth above the 3K woven cloth, then winding the unidirectional carbon fiber cloth on a core rod, then taking the modified resin to coat the modified resin above the satin cloth, then installing the core rod wound with the unidirectional carbon fiber cloth in the upper die and the lower die, closing the dies, putting the dies into a press to perform high-temperature pressing after closing the dies, cooling and then unloading the dies to form.
Further, the density of the hollow glass microspheres in the step (2) is 0.125-0.2g/cm3。
Further, the pressing process in the pressing machine in the step (3) is as follows: controlling the initial temperature at 130 ℃ and the pressure at 5MPa, releasing pressure for 1 second after 30 seconds, exhausting gas, closing the mold, controlling the temperature at 150 ℃ and the pressure at 10 MPa, maintaining the pressure and reducing the temperature after 10 minutes, and unloading the mold after cooling for molding.
Further, the content of the modified resin in the step (3) is 10% of the total weight of the carbon filaments in the 3K woven cloth, the satin cloth and the unidirectional carbon fiber cloth, and the total ratio of the sum of the resin and the modified resin to the total weight of the carbon filaments is 40% -50% because of the original resin of the 3K woven cloth, the satin cloth and the unidirectional carbon fiber cloth.
The preparation method of the carbon fiber structural member is improved, 3K woven cloth and satin cloth are used, modified resin is added, the carbon fiber structural member can be fused with the carbon fiber cloth, the appearance saturation of the formed carbon fiber structural member is increased through the good fluidity and reactivity of the resin, the self-repairing effect of surface defects (lacking of materials, concave holes, eyes and the like) of the formed carbon fiber product is achieved, the qualification rate of the product is improved, the labor is reduced, the cost is reduced, the carbon fiber product manufactured by the traditional process has hollow pits on the appearance surface, the filler is required to be manually polished and coated, then the sand blasting treatment is carried out, the primary coating and the secondary coating are carried out, the product formed by the modified resin adopted by the method only needs simple post processing and direct spraying treatment, the production efficiency is 2-4 times of the traditional process, and the fumed silica in the modified resin is added, the hollow glass microballoon used in the modified resin has the advantages of stable chemical property, no reaction in a system, thickening effect, more uniform material mixing, no precipitation and delamination in a short time, more stable product, and silicon dioxide which can be used as a lubricant is an excellent flow promoter, can enable the material to more fully fill each position of a die cavity when die assembly is carried out, avoids the defects of uneven pits on the surface of the product and the like, and plays a role in the modified resin: the material has the functions of slight expansion, light weight, high strength and fluidity, resin is lost in the forming process, the surface defects are easily caused by air discharge, most seriously, air holes are formed in the structure of the carbon piece, the subsequent performance is greatly damaged, the subsequent coating needs large manpower and material resources, and a plurality of unsafe factors are caused in the using process of the product. The method has strong structure, can increase the reaction capacity and solve the defects of the appearance of the carbon fiber product after being molded in the molding and curing process, thereby changing the aim of manually repairing the molded appearance in the traditional process, particularly in the preparation process of the modified resin, the adding sequence of the epoxy resin, the carbon black, the fumed silica and the hollow glass beads is very moderate, the fumed silica is added after the carbon black and the epoxy resin are mixed to ensure that the whole resin is in a non-Newtonian fluid state, then the hollow glass beads are added, further the hollow glass beads are uniformly suspended and dispersed in the resin, the integral expansion is uniform in the later heating and pressurizing process, the molding effect has very important function, the curing agent is mixed before being reused, the service time of the modified resin is prolonged, the surface of the prepared carbon fiber structural member is smooth, and has no pits, Lack of material, pits, holes, eyes, and the like.
Claims (5)
1. The carbon fiber structural member is characterized by comprising a 3K woven fabric layer, a satin fabric layer, a one-way carbon fiber fabric layer and a resin layer, wherein the 3K woven fabric layer is arranged on the outer layer, the satin fabric layer is arranged on the middle layer, the one-way carbon fiber fabric layer is arranged on the inner layer, and the 3K woven fabric layer, the satin fabric layer and the one-way carbon fiber fabric layer are sequentially stacked and then subjected to resin layer composite forming.
2. The preparation method of the carbon fiber structural member is characterized by comprising the following steps:
(1) preparing a mould of the carbon fiber structural member, wherein the mould is divided into an upper mould, a lower mould and a core rod, grooves in the shape of the structural member are formed in the end surfaces of the upper mould and the lower mould, and a forming cavity of the structural member is formed between the grooves of the upper mould and the lower mould and the core rod;
(2) preparing a modified resin: taking epoxy resin, carbon black, a curing agent, fumed silica and hollow glass beads, wherein the epoxy resin, the carbon black, the curing agent, the fumed silica and the hollow glass beads are in parts by weight: 40-50 parts of epoxy resin, 38-45 parts of curing agent, 1-2 parts of carbon black, 3-6 parts of fumed silica and 5-10 parts of hollow glass beads, wherein 40-50 parts of epoxy resin is taken firstly, then 1-2 parts of carbon black is added into the epoxy resin and uniformly stirred, then 3-6 parts of fumed silica is added into the epoxy resin mixed with the carbon black and uniformly stirred, after uniform stirring, 5-10 parts of hollow glass beads are added and then stirred, after stirring is finished, initial modified resin is formed, 38-45 parts of curing agent is added when the initial modified resin needs to be used and stirred to form modified resin;
(3) preparing a carbon fiber structural member: firstly, mixing initial modified resin with a curing agent according to the step in the step (2) to form modified resin, then taking 3K woven cloth, satin cloth and unidirectional carbon fiber cloth, firstly laying a layer of 3K woven cloth in grooves of an upper die and a lower die in the step (1), then laying a layer of satin cloth above the 3K woven cloth, then winding the unidirectional carbon fiber cloth on a core rod, then taking the modified resin to coat the modified resin above the satin cloth, then installing the core rod wound with the unidirectional carbon fiber cloth in the upper die and the lower die, closing the dies, putting the dies into a press to perform high-temperature pressing after closing the dies, cooling and then unloading the dies to form.
3. The method for preparing a carbon fiber structural member according to claim 1, wherein the density of the hollow glass beads in the step (2) is 0.125 to 0.2g/cm3。
4. The method for manufacturing a carbon fiber structural member as claimed in claim 1, wherein the pressing process in the press in the step (3) is: controlling the initial temperature at 130 ℃ and the pressure at 5MPa, releasing pressure for 1 second after 30 seconds, exhausting gas, closing the mold, controlling the temperature at 150 ℃ and the pressure at 10 MPa, maintaining the pressure and reducing the temperature after 10 minutes, and cooling to form and unload the mold.
5. The method for preparing a carbon fiber structural member according to claim 1, wherein the content of the modified resin in the step (3) is 10% by weight of the total carbon filaments in the 3K woven cloth, the satin cloth and the unidirectional carbon fiber cloth.
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CN109703121A (en) * | 2019-03-12 | 2019-05-03 | 安徽奇艺新材塑胶有限公司 | A kind of novel carbon fiber composite and products thereof processing molding method |
CN210337139U (en) * | 2019-06-24 | 2020-04-17 | 江苏悦肤堂纺织有限公司 | Fiber cloth |
CN211307453U (en) * | 2019-11-14 | 2020-08-21 | 威海和利源碳纤维科技有限公司 | Carbon fiber fishing rod handle forming die |
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