CN114434890A - Preparation method of composite carbon fiber tape for automatic laying liquid forming - Google Patents

Preparation method of composite carbon fiber tape for automatic laying liquid forming Download PDF

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Publication number
CN114434890A
CN114434890A CN202111565534.5A CN202111565534A CN114434890A CN 114434890 A CN114434890 A CN 114434890A CN 202111565534 A CN202111565534 A CN 202111565534A CN 114434890 A CN114434890 A CN 114434890A
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China
Prior art keywords
carbon fiber
preparation
fibers
fiber tape
composite carbon
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Pending
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CN202111565534.5A
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Chinese (zh)
Inventor
俞建勇
张辉
刘勇
李朝阳
薛怿
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Donghua University
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Donghua University
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Priority to CN202111565534.5A priority Critical patent/CN114434890A/en
Publication of CN114434890A publication Critical patent/CN114434890A/en
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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
    • B32B5/022—Non-woven fabric
    • 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
    • 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
    • B32B5/08—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 the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different 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
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43825—Composite fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • 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
    • B32B2262/02—Synthetic macromolecular 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials

Abstract

The invention relates to a preparation method of a composite carbon fiber tape for automatic laying liquid forming. The method comprises the following steps: mixing polyetherimide resin and polyarylsulfone resin, carrying out melt spinning, cutting to obtain short fibers, and bonding the short fibers into a fiber felt; spreading the coiled carbon fibers into unidirectional carbon fibers, and bonding the unidirectional carbon fibers into a unidirectional carbon fiber tape; and hot pressing the fiber felt as an upper layer and a lower layer and the unidirectional carbon fiber belt as a middle layer. The method has the advantages of no release paper and PE film, simple production process and low cost; the prepared composite carbon fiber tape does not need refrigeration, has good room-temperature storage stability, and products obtained by a subsequent automatic laying process have high quality, good repeatability and low porosity.

Description

Preparation method of composite carbon fiber tape for automatic laying liquid forming
Technical Field
The invention belongs to the field of preparation of carbon fiber materials, and particularly relates to a preparation method of a composite carbon fiber belt for automatic liquid laying and forming.
Background
Due to the unique properties of high specific strength and specific modulus, wide material designability, easy integral forming, better fatigue resistance and corrosion resistance, and the like, the carbon fiber composite material is more and more widely applied to aerospace structures. The automatic laying technology is controllable, the number of the prepreg yarns can be controlled in real time to meet the requirement of actual laying, and the automatic laying technology is suitable for automatic forming of large-size components with irregular shapes and complex boundaries and becomes a typical manufacturing technology of large-size complex composite material parts. However, the automatic laying technology of the prepreg is the most researched at home, and the research organization for the unidirectional fiber belt with dry feeling and automatic laying is less. And because the thickness of the prepreg tape is larger after curing, and the energy consumption for autoclave curing in the later period is very large, the development of automatic manufacturing of carbon fiber composite materials in China is limited in order to reduce the cost and meet the challenge of improving the manufacturing efficiency of the carbon fiber composite materials.
Chinese patent CN112590252A discloses a method for enhancing interlayer performance of a thermoplastic automatic laying component, which uses carbon nano paper with different dispersion degrees to alternately lay up and form thermoplastic fiber prepreg and the carbon nano paper by an automatic laying method. The method has the advantages that the interlaminar mechanical properties of the thermoplastic product can be improved, and the interlaminar dispersibility of the carbon nano-material and the process coordination among the multi-scale mechanical properties can be effectively regulated and controlled. The defects are that the preparation process is complex, the thickness of the prepreg after curing is large, and the cost is high.
Chinese patent CN111941822A discloses a preparation method of a unidirectional high-viscosity prepreg tape for automatic laying, which is suitable for an automatic laying forming process and can obtain the unidirectional prepreg tape with continuous high-viscosity length, constant width and good unwinding property. The defects that the storage cost of the prepreg is high, the viscosity is high, and the automatic laying efficiency is influenced are overcome.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a composite carbon fiber belt for automatically laying liquid for forming, so as to overcome the defects of low efficiency, unstable performance and high cost of automatically laying a carbon fiber composite material in the prior art.
The invention provides a preparation method of a composite carbon fiber belt, which comprises the following steps:
(1) mixing polyetherimide resin and polyarylsulfone resin, and performing melt spinning to obtain long fibers;
(2) cutting the long fibers in the step (1) to obtain short fibers, and bonding the short fibers into a fiber felt by adopting a bonding agent;
(3) spreading the coiled carbon fibers into unidirectional carbon fibers, and bonding the unidirectional carbon fibers into a unidirectional carbon fiber tape by using a bonding agent;
(4) and (3) taking the fibrofelt in the step (2) as an upper layer and a lower layer and the unidirectional carbon fiber belt in the step (3) as a middle layer, and carrying out hot pressing to obtain the composite carbon fiber belt for automatic liquid laying molding.
Preferably, the mass ratio of the polyetherimide resin to the polyarylsulfone resin in the step (1) is 1:1 to 3.
Preferably, the melt spinning process parameters in the step (1) are as follows: the spinning temperature is 320-370 ℃, and the spinning speed is 200-300 m/min.
Preferably, in the step (2), the short fiber has a length of 5-30 mm and a diameter of 10-50 μm.
Preferably, the mass ratio of the binder in the steps (2) and (3) is 1: 5-7: 2-4 of nano para-aramid particles, E51 epoxy resin and polyurethane, wherein the particle size of the nano para-aramid particles is 100-300 nm.
Preferably, the gram weight of the fiber felt in the step (4) is 10-30 gsm, and the thickness is 20-80 μm.
Preferably, the thickness of the unidirectional carbon fiber tape in the step (4) is 200-500 μm.
Preferably, the process parameters of the hot pressing in the step (4) are as follows: hot pressing at 100-150 deg.c for 30-60min and 1-3 MPa.
Preferably, the composite carbon fiber tape in the step (4) is in a sandwich structure.
The invention also provides the composite carbon fiber belt prepared by the preparation method.
The invention provides an application of a composite carbon fiber tape in automatic laying liquid forming.
Advantageous effects
(1) The invention has no release paper and PE film, simple production process and low cost;
(2) the prepared composite carbon fiber tape does not need refrigeration and can be stored for several months at room temperature;
(3) the product obtained by carrying out the automatic laying process on the composite carbon fiber tape has high quality and good repeatability, and the porosity is lower than 0.5%.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
(1) Blending polyetherimide resin and polyarylsulfone resin according to the mass ratio of 1:1, carrying out melt spinning at the spinning temperature of 360 ℃ and the spinning speed of 280m/min to obtain blended resin long fibers with the diameter of 10 mu m, and then cutting the blended resin long fibers into short fibers with the length of 8 mm;
(2) mixing para-aramid particles with the particle size of 150nm, E51 epoxy resin and polyurethane according to the mass ratio of 1:5:2 to obtain a binder, and binding short fibers into a fiber mat with the gram weight of 10gsm and the thickness of 20 mu m by using the binder;
(3) spreading the coiled carbon fibers into unidirectional carbon fibers, and then bonding the unidirectional carbon fibers into a unidirectional carbon fiber tape with the thickness of 300 mu m by using the bonding agent obtained in the step (2);
(4) forming a sandwich structure by two fiber felts obtained in the step (2) and the unidirectional carbon fiber belt obtained in the step (3) for hot pressing, wherein the upper surface and the lower surface are the fiber felts, the middle layer is the unidirectional carbon fiber belt, and the hot pressing process is that the hot pressing is carried out for 60min at the temperature of 120 ℃ and under the pressure of 1 MPa; and obtaining the composite carbon fiber belt which can be used for automatically laying liquid for forming. The composite fiber band can be stored for 8 months at room temperature; the product obtained by carrying out the automatic laying process on the composite carbon fiber tape has high quality and good repeatability, and the porosity is lower than 0.5%.
Example 2
(1) Blending polyetherimide resin and polyarylsulfone resin according to the mass ratio of 1:2, carrying out melt spinning at the spinning temperature of 340 ℃ and the spinning speed of 220m/min to obtain blended resin long fibers with the diameter of 15 mu m, and then cutting the blended resin long fibers into short fibers with the length of 15 mm;
(2) mixing para-aramid particles with the particle size of 200nm, E51 epoxy resin and polyurethane in a mass ratio of 1:7:3 to obtain a binder, and bonding short fibers into a fiber mat with the grammage of 20gsm and the thickness of 30 mu m by using the binder;
(3) spreading the coiled carbon fibers into unidirectional carbon fibers, and then bonding the unidirectional carbon fibers into a unidirectional carbon fiber tape with the thickness of 400 mu m by using the bonding agent obtained in the step (2);
(4) forming a sandwich structure by two fiber felts obtained in the step (2) and the unidirectional carbon fiber belt obtained in the step (3) for hot pressing, wherein the upper surface and the lower surface are the fiber felts, the middle layer is the unidirectional carbon fiber belt, and the hot pressing process is that the fiber felts and the unidirectional carbon fiber belt are hot pressed for 30min at 140 ℃ and under the pressure of 1.5 MPa; and obtaining the composite carbon fiber belt which can be used for automatically laying liquid for forming. The composite fiber band can be stored for 8 months at room temperature; the product obtained by carrying out the automatic laying process on the composite carbon fiber tape has high quality and good repeatability, and the porosity is lower than 0.5%.

Claims (10)

1. A preparation method of a composite carbon fiber belt comprises the following steps:
(1) mixing polyetherimide resin and polyarylsulfone resin, and performing melt spinning to obtain long fibers;
(2) cutting the long fibers in the step (1) to obtain short fibers, and bonding the short fibers into a fiber felt by adopting a bonding agent;
(3) spreading the coiled carbon fibers into unidirectional carbon fibers, and bonding the unidirectional carbon fibers into a unidirectional carbon fiber tape by using a bonding agent;
(4) and (3) taking the fibrofelt in the step (2) as an upper layer and a lower layer and the unidirectional carbon fiber belt in the step (3) as a middle layer, and carrying out hot pressing to obtain the composite carbon fiber belt.
2. The preparation method according to claim 1, wherein the mass ratio of the polyetherimide resin to the polyarylsulfone resin in the step (1) is 1:1 to 3.
3. The preparation method according to claim 1, wherein the melt spinning in the step (1) comprises the following process parameters: the spinning temperature is 320-370 ℃, and the spinning speed is 200-300 m/min.
4. The method according to claim 1, wherein the staple fibers in the step (2) have a length of 5 to 30mm and a diameter of 10 to 50 μm.
5. The preparation method according to claim 1, wherein the binder in the steps (2) and (3) is mixed by mass ratio of 1: 5-7: 2-4 of nano para-aramid particles, E51 epoxy resin and polyurethane, wherein the particle size of the nano para-aramid particles is 100-300 nm.
6. The preparation method according to claim 1, wherein the fiber felt in the step (4) has a gram weight of 10-30 gsm and a thickness of 20-80 μm; the thickness of the unidirectional carbon fiber tape is 200-500 μm.
7. The preparation method according to claim 1, wherein the hot pressing in the step (4) has the following process parameters: hot pressing at 100-150 deg.c for 30-60min and 1-3 MPa.
8. The method according to claim 1, wherein the composite carbon fiber tape in the step (4) has a sandwich structure.
9. A composite carbon fiber tape produced by the production method according to claim 1.
10. Use of a composite carbon fiber tape according to claim 9 in automated lay-up liquid forming.
CN202111565534.5A 2021-12-20 2021-12-20 Preparation method of composite carbon fiber tape for automatic laying liquid forming Pending CN114434890A (en)

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07157578A (en) * 1993-12-03 1995-06-20 Mitsubishi Rayon Co Ltd Tow prepreg
CN102173153A (en) * 2010-12-13 2011-09-07 中国航空工业集团公司北京航空材料研究院 Preparation method of fiber reinforced composite material
CN103732688A (en) * 2011-06-03 2014-04-16 沙伯基础创新塑料知识产权有限公司 Sterilized polyetherimide /polyphenylene ether sulfone articles
CN106313579A (en) * 2015-06-19 2017-01-11 广州赛奥碳纤维技术有限公司 Short-cut tow prepreg tape preparation and mold pressing molding process
CN106863848A (en) * 2017-02-17 2017-06-20 南京航空航天大学 The forming method of the composite material blade of aero-engine
CN108099330A (en) * 2018-01-10 2018-06-01 上伟（江苏）碳纤复合材料有限公司 A kind of carbon fiber prepregs and preparation method thereof
CN111196072A (en) * 2018-11-16 2020-05-26 中国航空工业集团公司基础技术研究院 Continuous fiber reinforced thermoplastic prepreg unidirectional tape for additive manufacturing
CN111890595A (en) * 2020-07-31 2020-11-06 山东宽原新材料科技有限公司 System and preparation method of composite infiltration thermoplastic carbon fiber prepreg fabric
CN111941822A (en) * 2020-08-06 2020-11-17 南京航空航天大学 Preparation method of unidirectional high-viscosity prepreg narrow tape for automatic laying
CN112300534A (en) * 2020-09-14 2021-02-02 航天特种材料及工艺技术研究所 Prepreg for automatic fiber laying process and preparation method thereof
CN112590252A (en) * 2020-11-27 2021-04-02 哈尔滨工业大学 Method for enhancing interlayer performance of thermoplastic automatic laying component
CN113427841A (en) * 2015-11-12 2021-09-24 塞特工业公司 Hybrid veil as an interlayer in a composite material

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07157578A (en) * 1993-12-03 1995-06-20 Mitsubishi Rayon Co Ltd Tow prepreg
CN102173153A (en) * 2010-12-13 2011-09-07 中国航空工业集团公司北京航空材料研究院 Preparation method of fiber reinforced composite material
CN103732688A (en) * 2011-06-03 2014-04-16 沙伯基础创新塑料知识产权有限公司 Sterilized polyetherimide /polyphenylene ether sulfone articles
CN106313579A (en) * 2015-06-19 2017-01-11 广州赛奥碳纤维技术有限公司 Short-cut tow prepreg tape preparation and mold pressing molding process
CN113427841A (en) * 2015-11-12 2021-09-24 塞特工业公司 Hybrid veil as an interlayer in a composite material
CN106863848A (en) * 2017-02-17 2017-06-20 南京航空航天大学 The forming method of the composite material blade of aero-engine
CN108099330A (en) * 2018-01-10 2018-06-01 上伟（江苏）碳纤复合材料有限公司 A kind of carbon fiber prepregs and preparation method thereof
CN111196072A (en) * 2018-11-16 2020-05-26 中国航空工业集团公司基础技术研究院 Continuous fiber reinforced thermoplastic prepreg unidirectional tape for additive manufacturing
CN111890595A (en) * 2020-07-31 2020-11-06 山东宽原新材料科技有限公司 System and preparation method of composite infiltration thermoplastic carbon fiber prepreg fabric
CN111941822A (en) * 2020-08-06 2020-11-17 南京航空航天大学 Preparation method of unidirectional high-viscosity prepreg narrow tape for automatic laying
CN112300534A (en) * 2020-09-14 2021-02-02 航天特种材料及工艺技术研究所 Prepreg for automatic fiber laying process and preparation method thereof
CN112590252A (en) * 2020-11-27 2021-04-02 哈尔滨工业大学 Method for enhancing interlayer performance of thermoplastic automatic laying component

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