CN111844520B - Transfer method of carbon fiber prepreg and carbon fiber prepreg product - Google Patents
Transfer method of carbon fiber prepreg and carbon fiber prepreg product Download PDFInfo
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- CN111844520B CN111844520B CN202010654521.4A CN202010654521A CN111844520B CN 111844520 B CN111844520 B CN 111844520B CN 202010654521 A CN202010654521 A CN 202010654521A CN 111844520 B CN111844520 B CN 111844520B
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 249
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 249
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 238
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010030 laminating Methods 0.000 claims abstract description 16
- 239000004698 Polyethylene Substances 0.000 claims description 21
- -1 polyethylene Polymers 0.000 claims description 21
- 229920000573 polyethylene Polymers 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 description 17
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a transfer method of a carbon fiber prepreg and a carbon fiber prepreg product, wherein the transfer method of the carbon fiber prepreg comprises the following steps: providing a carbon fiber prepreg, wherein the carbon fiber prepreg comprises a release layer and a carbon fiber layer which are arranged in a laminated manner; laminating a receiving layer on the surface of the carbon fiber layer, which is far away from the release layer, wherein the release force of the receiving layer to the carbon fiber layer is not less than 240 g/mm; and stripping the release layer on the surface of the carbon fiber layer to obtain the carbon fiber prepreg product. The technical scheme of the invention can avoid the change of the orientation of the carbon fibers distributed on the carbon fiber layer and ensure the strength of the carbon fiber layer after transfer.
Description
Technical Field
The invention relates to the technical field of carbon fiber prepreg processing, in particular to a transfer method of a carbon fiber prepreg and a carbon fiber prepreg product.
Background
In the actual use process of the carbon fiber prepreg, a plurality of carbon fiber prepregs are generally required to be transferred to the same receiving layer to obtain the carbon fiber prepreg with a specific size. At present, the carbon fiber prepreg of specific size mainly handles the carbon fiber layer of carbon fiber prepreg through the heating pressurization to make the carbon fiber layer surface melting, like this, accept the layer and closely laminate in fused carbon fiber layer, so, detach the carbon fiber layer and deviate from to accept the layer from the type layer carbon fiber layer shift to accepting the layer after accepting the layer, thereby reached the transfer effect of carbon fiber layer. However, the carbon fiber layer is attached to the receiving layer in a melting manner, and the orientation of the carbon fibers distributed on the carbon fiber layer is changed in the melting process, so that the strength of the carbon fiber layer is affected, and the strength of the transferred carbon fiber layer cannot be guaranteed.
Disclosure of Invention
The invention mainly aims to provide a method for transferring a carbon fiber prepreg, aiming at avoiding the change of the orientation of carbon fibers distributed on a carbon fiber layer and ensuring the strength of the transferred carbon fiber layer.
In order to achieve the above object, the present invention provides a method for transferring a carbon fiber prepreg, comprising the steps of:
providing a carbon fiber prepreg, wherein the carbon fiber prepreg comprises a release layer and a carbon fiber layer which are arranged in a laminated manner;
laminating a receiving layer on the surface of the carbon fiber layer, which is far away from the release layer, wherein the release force of the receiving layer to the carbon fiber layer is not less than 240 g/mm;
and stripping the release layer on the surface of the carbon fiber layer to obtain the carbon fiber prepreg product.
Optionally, the release force of the receiving layer to the carbon fiber layer is 240g/mm to 250 g/mm.
Optionally, the release force of the receiving layer to the carbon fiber layer is at least 100g/mm higher than the release force of the release layer to the carbon fiber layer.
Optionally, the release force of the release layer to the carbon fiber layer is 140g/mm to 150 g/mm.
Optionally, the step of laminating a receiving layer on the surface of the carbon fiber layer facing away from the release layer comprises:
and introducing the receiving layer and the carbon fiber prepreg between two pairs of compression rollers, and controlling the compression pressure of the two pairs of compression rollers so that the receiving layer is laminated on the surface of the carbon fiber layer departing from the release layer.
Optionally, in the step of controlling the pressing pressure of the two pairs of pressing rolls, the pressing pressure of the two pairs of pressing rolls is 4kgf/cm2To 6kgf/cm2。
Optionally, the carbon fiber prepreg further includes a polyethylene layer, the polyethylene layer is disposed on a surface of the carbon fiber layer facing away from the release layer, and the step of laminating the receiving layer on the surface of the carbon fiber layer facing away from the release layer includes:
and removing the polyethylene layer arranged on the surface of the carbon fiber layer, which is deviated from the release layer.
Optionally, the step of laminating the receiving layer to the surface of the carbon fiber layer facing away from the release layer comprises:
and depositing a release agent on the surface of the base layer so as to solidify and mold the release agent on the base layer to obtain the receiving layer.
Optionally, in the step of depositing a release agent on the surface of the base layer, the release agent includes kaolin and silicone oil.
Optionally, the carbon fiber prepreg product includes a polyethylene layer, the polyethylene layer is disposed on a surface of the carbon fiber layer away from the receiving layer, and the step of "peeling off the release layer on the surface of the carbon fiber layer" further includes:
and attaching a polyethylene layer to the surface of the carbon fiber layer deviating from the bearing layer.
The invention also provides a carbon fiber prepreg product, which is obtained by the transfer method of the carbon fiber prepreg, and the transfer method of the carbon fiber prepreg comprises the following steps: providing a carbon fiber prepreg, wherein the carbon fiber prepreg comprises a release layer and a carbon fiber layer which are arranged in a laminated manner; laminating a receiving layer on the surface of the carbon fiber layer, which is far away from the release layer, wherein the release force of the receiving layer to the carbon fiber layer is not less than 240 g/mm; and stripping the release layer on the surface of the carbon fiber layer to obtain the carbon fiber prepreg product.
According to the technical scheme, the bearing layer is laminated on the surface, away from the release layer, of the carbon fiber layer, and the release force of the bearing layer to the carbon fiber layer is not less than 240g/mm, so that the bearing layer is tightly attached to the carbon fiber layer, and the carbon fiber layer is transferred to the bearing layer after the release layer on the surface of the carbon fiber layer is peeled, and the transfer of the carbon fiber layer is achieved. In addition, the carbon fiber layer is tightly attached through the bearing layer with high release force, the carbon fiber layer does not need to be heated and melted, so that the change of the orientation of the carbon fibers distributed on the carbon fiber layer is avoided, and the strength of the carbon fiber layer is ensured. Namely, the technical scheme of the invention can avoid the change of the orientation of the carbon fibers distributed on the carbon fiber layer and ensure the strength of the transferred carbon fiber layer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a flow chart of one embodiment of a method of transferring a carbon fiber prepreg of the present invention;
FIG. 2 is a detailed flowchart of step S30 in FIG. 1 according to the present invention;
FIG. 3 is a flow chart of another embodiment of a method of transferring a carbon fiber prepreg of the present invention;
FIG. 4 is a flow chart of another embodiment of a method of transferring a carbon fiber prepreg of the present invention;
FIG. 5 is a process flow diagram of one embodiment of a method of transferring a carbon fiber prepreg of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
The invention provides a transfer method of a carbon fiber prepreg, aiming at avoiding the change of the orientation of carbon fibers distributed on a carbon fiber layer and ensuring the strength of the carbon fiber layer obtained after transfer.
Referring to fig. 1, in an embodiment of the invention, a method for transferring a carbon fiber prepreg includes the following steps:
step S10, providing a carbon fiber prepreg, wherein the carbon fiber prepreg comprises a release layer and a carbon fiber layer which are arranged in a laminated manner;
step S30, laminating a receiving layer on the surface of the carbon fiber layer, which is far away from the release layer, wherein the release force of the receiving layer on the carbon fiber layer is not less than 240 g/mm;
and step S40, stripping the release layer on the surface of the carbon fiber layer to obtain the carbon fiber prepreg product.
According to the technical scheme, the bearing layer is laminated on the surface, away from the release layer, of the carbon fiber layer, and the release force of the bearing layer to the carbon fiber layer is not less than 240g/mm, so that the bearing layer is tightly attached to the carbon fiber layer, and the carbon fiber layer is transferred to the bearing layer after the release layer on the surface of the carbon fiber layer is peeled, and the transfer of the carbon fiber layer is achieved. In addition, the carbon fiber layer is tightly attached through the bearing layer with high release force, the carbon fiber layer does not need to be heated and melted, so that the change of the orientation of the carbon fibers distributed on the carbon fiber layer is avoided, and the strength of the carbon fiber layer is ensured. Namely, the technical scheme of the invention can avoid the change of the orientation of the carbon fibers distributed on the carbon fiber layer and ensure the strength of the carbon fiber layer obtained after the transfer.
It should be noted that, the receiving layer improves the releasing force of the carbon fiber layer by improving the roughness, on one hand, polishing may be adopted to form the receiving layer with the required roughness, and on the other hand, the releasing agent may be deposited on the surface of the receiving layer to form a rough structure, so as to improve the releasing force of the receiving layer to the carbon fiber layer.
In an embodiment of the invention, the release force of the receiving layer to the carbon fiber layer is 240g/mm to 250 g/mm. The release force of the receiving layer to the carbon fiber layer is the peeling force of the receiving layer on the carbon fiber layer, and the larger the peeling force is, the tighter the receiving layer and the carbon fiber layer are combined, the more difficult the receiving layer is to be peeled off from the carbon fiber layer, and the corresponding release force is also larger at this moment. In the embodiment of the invention, when the release force of the receiving layer to the carbon fiber layer is higher than 240g/mm, the receiving layer can be tightly combined with the carbon fiber layer, and when the release force of the receiving layer to the carbon fiber layer is higher than 250g/mm, the receiving layer is too tightly combined with the carbon fiber layer, so that the receiving layer and the carbon fiber layer cannot be completely peeled off in the subsequent use process of the carbon fiber layer, the receiving layer remains on the surface of the carbon fiber layer, and the strength of the carbon fiber layer is reduced while the use of the carbon fiber layer is influenced.
In an embodiment of the invention, the release force of the receiving layer to the carbon fiber layer is at least 100g/mm higher than the release force of the release layer to the carbon fiber layer. According to the embodiment of the invention, the release force of the receiving layer and the release layer on the carbon fiber layer is adjusted, so that the release layer can be peeled off from the carbon fiber layer by rolling in the process of laminating the receiving layer and the carbon fiber layer, and the transfer efficiency of the carbon fiber prepreg is improved.
In an embodiment of the invention, the release force of the release layer to the carbon fiber layer is 140g/mm to 150 g/mm. In order to ensure the normal transportation of the carbon fiber prepreg, the release force of the release layer to the carbon fiber layer is 140g/mm to 150g/mm, so that the smooth peeling of the release layer in the lamination process of the receiving layer and the carbon fiber layer is realized on one hand; on the other hand, the stable attachment of the release layer on the carbon fiber layer is ensured, and the separation of the carbon fiber prepreg from the release layer from the carbon fiber layer in the carrying process is avoided.
Referring to fig. 2, in an embodiment of the present invention, the step of laminating a receiving layer on the surface of the carbon fiber layer facing away from the release layer includes: step S31, introducing the receiving layer and the carbon fiber prepreg between two pairs of compression rollers; and step S32, controlling the opposite pressing pressure of the two opposite pressing rollers to enable the receiving layer to be laminated on the surface of the carbon fiber layer, which is far away from the release layer. According to the embodiment of the invention, the carbon fiber prepreg of the receiving layer is introduced into the two pairs of compression rollers, so that the receiving layer is tightly attached to the carbon fiber layer by controlling the compression pressure of the two pairs of compression rollers.
In an embodiment of the present invention, in the step of controlling the pressing force of the two pairs of pressing rolls, the pressing force of the two pairs of pressing rolls is 4kgf/cm2To 6kgf/cm2. According to the embodiment of the invention, the pressing pressure of the two pressing rollers is controlled, so that the receiving layer is laminated on the carbon fiber layer, and the binding force between the receiving layer and the carbon fiber layer is adjusted, thereby not only ensuring that the receiving layer can be stably laminated on the carbon fiber layer, but also facilitating the release layer to be conveniently laminated on the surface of the carbon fiber layerAnd (6) stripping. Of course, the pressing pressure against the press roll exceeds 6kgf/cm2Accept too closely that layer and carbon fiber layer combine, accept that the layer can't follow the complete peeling off in carbon fiber layer surface, so, influenced the follow-up use of carbon fiber layer, can't guarantee the intensity on carbon fiber layer. Preferably, the pair of press rolls has a pressing force of 5kgf/cm2Therefore, the bonding force between the bearing layer and the carbon fiber layer is moderate, and the subsequent processing is facilitated.
Referring to fig. 3, in an embodiment of the present invention, the carbon fiber prepreg further includes a polyethylene layer, the polyethylene layer is disposed on a surface of the carbon fiber layer facing away from the release layer, and the step of laminating a receiving layer on the surface of the carbon fiber layer facing away from the release layer includes: and step S20, removing the polyethylene layer arranged on the surface of the carbon fiber layer, which is opposite to the release layer. In order to facilitate the carrying of the carbon fiber prepreg, a polyethylene layer is arranged on the surface, deviating from the release layer, of the carbon fiber layer of the carbon fiber prepreg under a general condition, and the two adjacent carbon fiber prepregs are prevented from being mutually disorderly bonded due to the fact that the carbon fiber layer has cohesiveness, so that the carbon fiber prepreg with the polyethylene layer ensures the normal carrying of the carbon fiber prepreg. In this way, the polyethylene layer on the surface of the carbon fiber layer is removed between the pressing receiving layers, so that the subsequent pressing of the receiving layers on the surface of the carbon fiber layer is facilitated.
Referring to fig. 4, in an embodiment of the invention, the step of laminating the receiving layer on the surface of the carbon fiber layer facing away from the release layer includes: and step S25, depositing a release agent on the surface of the base layer so that the release agent is cured and molded on the base layer to obtain the receiving layer. It should be noted that in the embodiment of the present invention, the release agent is deposited on the surface of the base layer, so that the surface of the base layer forms a rough structure, and thus, the roughness of the surface of the base layer is increased, and the rough structure can be embedded into the carbon fiber layer, so as to form a nail anchor effect, ensure the close adhesion between the receiving layer and the carbon fiber layer, and improve the release force of the receiving layer to the carbon fiber layer. Of course, the component concentration of the release agent can be properly adjusted in the embodiment of the present invention, so as to improve the release force of the receiving layer to the carbon fiber layer.
In an embodiment of the invention, in the step of depositing the release agent on the surface of the base layer, the release agent includes kaolin and silicone oil. In the embodiment of the invention, kaolin is introduced, so that a rough structure is formed on the surface of the receiving layer through the introduced kaolin. In order to adjust the binding force between the receiving layer and the carbon fiber layer, the embodiment of the invention introduces the silicone oil which is used as a surfactant, so that on one hand, the receiving layer is ensured to be tightly attached to the carbon fiber layer, and on the other hand, the carbon fiber prepreg product is convenient to peel off the receiving layer in the subsequent use.
Referring to fig. 4, in an embodiment of the present invention, the carbon fiber prepreg product includes a polyethylene layer, the polyethylene layer is disposed on a surface of the carbon fiber layer facing away from the receiving layer, and the step of "peeling off the release layer on the surface of the carbon fiber layer" further includes: and attaching a polyethylene layer to the surface of the carbon fiber layer deviating from the bearing layer. According to the embodiment of the invention, the polyethylene layer is pressed on the surface of the carbon fiber layer, which is far away from the bearing layer, so that two adjacent carbon fiber prepreg products are prevented from being mutually disorderly bonded due to the fact that the carbon fiber layers have cohesiveness, and the normal carrying of the carbon fiber prepreg products is ensured.
The invention also provides a carbon fiber prepreg product, which is obtained by the transfer method of the carbon fiber prepreg, and the transfer method of the carbon fiber prepreg comprises the following steps: providing a carbon fiber prepreg, wherein the carbon fiber prepreg comprises a release layer and a carbon fiber layer which are arranged in a laminated manner; laminating a receiving layer on the surface of the carbon fiber layer, which is far away from the release layer, wherein the release force of the receiving layer to the carbon fiber layer is not less than 240 g/mm; and stripping the release layer on the surface of the carbon fiber layer to obtain the carbon fiber prepreg product. According to the invention, the carbon fiber layer is tightly attached through the bearing layer with high release force, and the carbon fiber layer does not need to be heated and melted, so that the orientation of carbon fibers distributed on the carbon fiber layer is prevented from changing, and the strength of the carbon fiber layer is ensured. Namely, the technical scheme of the invention can avoid the change of the orientation of the carbon fibers distributed on the carbon fiber layer, and ensure the strength of the carbon fiber layer of the obtained carbon fiber prepreg product.
The technical solution of the present invention is further described below with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Example 1
As shown in FIG. 5, the polyethylene layer of the carbon fiber prepreg was removed, the carbon fiber prepreg from which the polyethylene layer was removed and the carrier layer were introduced between two pairs of press rolls, and the pair press pressure of the two pairs of press rolls was controlled to be 5kgf/cm2And meanwhile, the winding roller is adopted to wind the release layer, so that the receiving layer is wound on the winding roller from the release layer while deviating from the surface of the release layer on the carbon fiber layer, and then the carbon fiber layer deviates from the surface pressing polyethylene layer of the receiving layer, and the carbon fiber prepreg product is obtained.
According to the embodiment of the invention, the carbon fiber layer is not required to be heated and melted, so that the orientation of the carbon fibers distributed on the carbon fiber layer is prevented from changing, and the strength of the carbon fiber prepreg product is ensured.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method for transferring a carbon fiber prepreg is characterized by comprising the following steps:
providing a carbon fiber prepreg, wherein the carbon fiber prepreg comprises a release layer and a carbon fiber layer which are arranged in a laminated manner;
laminating a receiving layer on the surface of the carbon fiber layer, which is far away from the release layer, wherein the release force of the receiving layer to the carbon fiber layer is not less than 240 g/mm;
peeling the release layer on the surface of the carbon fiber layer to obtain a carbon fiber prepreg product;
the step of laminating the receiving layer on the surface of the carbon fiber layer facing away from the release layer comprises the following steps:
the release agent is deposited on the surface of the base layer, so that the release agent is solidified and molded on the base layer to obtain the receiving layer, and the surface of the base layer forms a rough structure, so that the roughness of the surface of the base layer is increased, and the rough structure can be embedded into the carbon fiber layer to form a nail anchor effect, thereby ensuring the close fit of the receiving layer and the carbon fiber layer and improving the release force of the receiving layer to the carbon fiber layer;
compared with the release force of the release layer to the carbon fiber layer, the release force of the receiving layer to the carbon fiber layer is at least 100g/mm higher.
2. The method for transferring a carbon fiber prepreg according to claim 1, wherein a release force of the receiving layer to the carbon fiber layer is 240g/mm to 250 g/mm.
3. The method for transferring a carbon fiber prepreg according to claim 1, wherein a release force of the release layer to the carbon fiber layer is 140g/mm to 150 g/mm.
4. The method for transferring a carbon fiber prepreg according to claim 1, wherein the step of laminating a receiving layer to a surface of the carbon fiber layer facing away from the release layer comprises:
and introducing the receiving layer and the carbon fiber prepreg between two pairs of compression rollers, and controlling the compression pressure of the two pairs of compression rollers so that the receiving layer is laminated on the surface of the carbon fiber layer departing from the release layer.
5. The method for transferring a carbon fiber prepreg according to claim 4, wherein in the step of controlling the counter pressure of the two counter pressure rollers, the counter pressure of the two counter pressure rollers is 4kgf/cm2To 6kgf/cm2。
6. The method of transferring a carbon fiber prepreg according to any one of claims 1 to 5, wherein the carbon fiber prepreg further comprises a polyethylene layer provided on a surface of the carbon fiber layer facing away from the release layer, and the step of laminating a receiving layer to the surface of the carbon fiber layer facing away from the release layer comprises:
and removing the polyethylene layer arranged on the surface of the carbon fiber layer, which is deviated from the release layer.
7. The method for transferring a carbon fiber prepreg according to any one of claims 1 to 5, wherein in the step of depositing a release agent on the surface of the base layer, the release agent comprises kaolin and silicone oil.
8. A carbon fiber prepreg product obtained by the method for transferring a carbon fiber prepreg according to any one of claims 1 to 7.
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| CN116423872B (en) * | 2023-05-12 | 2026-03-06 | 南京玻璃纤维研究设计院有限公司 | A pressing apparatus and method for carbon fiber prepreg |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177779A (en) * | 1991-11-14 | 1993-07-20 | Mitsubishi Rayon Co Ltd | Laminate of carbon fiber fabric of extremely low density |
| US5387301A (en) * | 1992-11-30 | 1995-02-07 | Tonen Corporation | Method of manufacturing a prepreg |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177779A (en) * | 1991-11-14 | 1993-07-20 | Mitsubishi Rayon Co Ltd | Laminate of carbon fiber fabric of extremely low density |
| US5387301A (en) * | 1992-11-30 | 1995-02-07 | Tonen Corporation | Method of manufacturing a prepreg |
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