CN113829643B - Composite silica gel sealing strip and method for preparing bubble-free carbon fiber product - Google Patents
Composite silica gel sealing strip and method for preparing bubble-free carbon fiber product Download PDFInfo
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- CN113829643B CN113829643B CN202110950580.0A CN202110950580A CN113829643B CN 113829643 B CN113829643 B CN 113829643B CN 202110950580 A CN202110950580 A CN 202110950580A CN 113829643 B CN113829643 B CN 113829643B
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- silica gel
- carbon fiber
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- composite silica
- sealing strip
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000000741 silica gel Substances 0.000 title claims abstract description 101
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 101
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 63
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 63
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000007789 sealing Methods 0.000 title claims abstract description 53
- 239000002131 composite material Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 44
- 229920005989 resin Polymers 0.000 claims abstract description 44
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 239000003292 glue Substances 0.000 claims abstract description 28
- 238000000465 moulding Methods 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000007731 hot pressing Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 6
- -1 polysiloxane Polymers 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 3
- 229920001843 polymethylhydrosiloxane Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 8
- 239000004576 sand Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 231100000647 material safety data sheet Toxicity 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0288—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
- B29K2083/005—LSR, i.e. liquid silicone rubbers, or derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
- B29L2031/265—Packings, Gaskets
Abstract
A composite silica gel sealing strip is prepared by mixing and thermally curing a silica gel agent A and a silica gel agent B; the composite silica gel comprises the following components in parts by weight, wherein the weight ratio of a silica gel A agent to a silica gel B agent is = 1-1.2; the Vickers hardness of the composite silica gel sealing strip is 42-48; a method for preparing bubble-free carbon fiber products by using the composite silica gel sealing strip comprises the steps of mixing a silica gel A agent and a silica gel B agent in proportion, pouring the mixture into a sealing groove of a lower die, pressing the upper die, and heating and curing the composite silica gel liquid to prepare the composite silica gel sealing strip; arranging a glue overflow groove on a lower die of the forming die, wherein the glue overflow groove is positioned between a product forming surface and a sealing groove; coating resin on the carbon fiber, and putting the carbon fiber on a molding surface of a mold for hot pressing to prepare a carbon fiber product. The invention solves the problems that air bubbles and partial dry sand are easily formed on the surface of a product when a carbon fiber product is prepared by a traditional wet-process mould pressing process, and holes and glue shortage are easily caused on a raised part of the product positioned on a mould parting surface.
Description
Technical Field
The invention relates to the technical field of carbon fiber processing, in particular to a composite silica gel sealing strip and a method for preparing a bubble-free carbon fiber product.
Background
The carbon fiber belongs to fiber materials, and the forming process can adopt a Wet-process Molding process, which is also called a WCM (Wet Compression Molding) process, and the Wet-process Molding process is mainly characterized in that dry fiber cloth is cut and used at the early stage, and is put into a mold for curing and forming after resin spraying, so that the application industry is wide, and the Wet-process Molding process has the advantages of fast batch production beat, simple mold design and low single-piece cost.
In the existing wet-process mould pressing process, carbon fiber cloth is extended and spread on a mould, a silica gel sealing strip is pressed on the carbon fiber cloth and then is subjected to hot pressing, and a small gap is reserved between the sealing strip and the mould for exhausting. However, the extremely small gap also causes the convex part of the product on the molding surface of the mold to be easy to generate holes, which is manifested as glue shortage. And air bubbles and local dry sand are easily formed on the surface of the molded product, so that the performance and the surface quality of the product are seriously influenced, and the qualified rate of the product is low. In order to solve the problem, a circle of sealing groove is arranged on the outer side of the parting surface of the die, and a circle of sealing strip is arranged in the sealing groove, so that the inside of the die is airtight during hot pressing, and resin is prevented from flowing out of the die through a gap under high pressure to cause the surface of a product to be short of glue. But traditional sealing strip hardness is great, and the decrement is less, can't realize high-pressure seal after the cope match-plate pattern pushes down, still leads to the product to lack glue, form the bubble easily.
The generation of bubbles during the curing and forming process has several reasons: too fast curing speed, high heat release temperature, large resin curing shrinkage, and excessive addition of solvent and plasticizer in the resin are easy to generate bubbles in the curing process. In general, to solve these problems during the curing process, the overall formula of the glue needs to be adjusted, but the resin formula is the root of the manufacturer, and the adjustment of the formula is not performed unless the amount is too large for the manufacturer to reject, and the production of the resin by the company of own is difficult to achieve. Therefore, there is a need to invent a method of making bubble free carbon fiber products.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, provides a method for preparing a bubble-free carbon fiber product, and solves the problems that bubbles and partial dry sand are easily formed on the surface of the product when a traditional wet-process mould pressing process is used for preparing the carbon fiber product, and holes and glue shortage are easily caused on a convex part of the product on a mould parting surface.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a composite silica gel sealing strip, which is prepared by mixing and thermally curing a silica gel agent A and a silica gel agent B; the composite silica gel comprises the following components in parts by weight, wherein the weight ratio of a silica gel agent A to a silica gel agent B is 1-1.2; the Vickers hardness of the composite silica gel sealing strip is 42-48.
The silica gel A agent comprises 99.9 wt% of monovinyl-terminated dimethyl (siloxane and polysiloxane), and 0.1 wt% of platinum (0) -1, 3-divinyl-1, 3-tetramethyldisiloxane; the silica gel B agent comprises 30 weight percent of polymethylhydrosiloxane and 70 weight percent of monovinyl-terminated dimethyl (siloxane and polysiloxane).
The invention also provides a method for preparing the bubble-free carbon fiber product, which comprises the following steps:
mixing the silica gel A agent and the silica gel B agent in proportion to form composite silica gel liquid, pouring the composite silica gel liquid into a sealing groove of a lower die of a forming die, heating and curing the composite silica gel liquid after the upper die is pressed down to form a composite silica gel sealing strip;
arranging a glue overflow groove on a lower die of the forming die, wherein the glue overflow groove is positioned between a product forming surface and a sealing groove;
after coating resin on the carbon fiber, placing the carbon fiber on a molding surface of a molding die for hot pressing;
and extruding resin from the carbon fibers by pressure in the hot-press molding process in a sealed environment, uniformly filling the resin into a mold cavity, and discharging the redundant resin with accumulated air bubbles into an overflow glue groove to prepare the carbon fiber product without air bubble holes.
Further, the temperature of the composite silica gel liquid is 35-45 ℃ during heating and curing, and the heating is kept for at least 60min.
Further, overflow the seal groove after filling the seal groove with mixed silica gel liquid, when heating mixed silica gel liquid, the clearance between the mould back and the lower mould is increaseed 2mm after the mould is pushed down.
The invention has the beneficial effects that: the invention uses the compound silica gel with large compressibility to manufacture the sealing strip, and the lower die is provided with the glue overflow groove, so that a closed environment is formed in the die during hot pressing, and resin is extruded out of fibers by pressure in the forming process, thereby ensuring that resin can be fully filled at a higher position above a parting surface in the die, and redundant bubbles can be concentrated in the glue overflow groove, ensuring the surface quality of a product, and avoiding the phenomena of bubbles and glue shortage.
The invention will be described in more detail below with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic view of a sealing structure of a lower die of a carbon fiber product forming die in the invention.
Fig. 2 is a lower die structure view of a forming die for carbon fiber products in the invention.
Detailed Description
As shown in fig. 1, the invention provides a composite silica gel sealing strip, which is prepared by mixing and thermally curing a silica gel agent a and a silica gel agent B; the silica gel A is provided by HongyeJe science and technology Limited company in Shenzhen, the model is E640A, the components of the silica gel A are 99.9 percent of monovinyl terminated dimethyl (siloxane and polysiloxane) by MSDS detection, the CAS Number is 68083-19-2, and 0.1 percent of platinum (0) -1, 3-divinyl-1, 3-tetramethyl disiloxane by weight percent, the CAS Number is 68478-92-2; the silica gel B agent is provided by Hongejie science and technology Limited in Shenzhen, and is of a model E640B, and the constituents of the silica gel B agent are 30 weight percent of polymethylhydrosiloxane (hydrogen-containing silicone oil), CAS Number:63148-57-2, and 70 weight percent of monovinyl-terminated dimethyl (siloxane and polysiloxane), CAS Number:68083-19-2, detected by MSDS. The composite silica gel comprises the following components in parts by weight, wherein the weight ratio of a silica gel agent A to a silica gel agent B is 1-1.2; the Vickers hardness of the composite silica gel sealing strip is 42-48.
The invention also provides a method for preparing a bubble-free carbon fiber product by using the composite silica gel sealing strip, which comprises the following preparation steps:
firstly, mixing the silica gel A agent and the silica gel B agent in proportion to form composite silica gel liquid, pouring the composite silica gel liquid into a sealing groove 4 of a lower die 1 of a forming die shown in figures 1 and 2, pressing the upper die, and heating and curing the composite silica gel liquid to form a composite silica gel sealing strip 5;
then, arranging a glue overflow groove 3 on a lower die 1 of the forming die, wherein the glue overflow groove is positioned between a product forming surface 2 and a sealing groove 4;
then, after resin is coated on the carbon fiber, the carbon fiber is placed on a molding surface 2 of a molding die for hot pressing;
and finally, extruding resin from the carbon fibers by pressure in the hot-press molding process in a sealed environment, uniformly filling the resin into a mold cavity, and discharging the redundant resin with accumulated air bubbles into an overflow glue groove 3 to prepare an air bubble hole-free carbon fiber product 6.
Further, in order to ensure the complete curing of the composite silica gel liquid, the temperature of the composite silica gel liquid is 35-45 ℃ during heating and curing, and the heating is kept for at least 60min.
Furthermore, in order to ensure that the cured composite silica gel strip is higher than the sealing groove 4 and better reserves a compression allowance, the sealing groove 4 is overflowed after the sealing groove 4 is filled with the mixed silica gel liquid, and when the mixed silica gel liquid is heated, the upper die is pressed down and then is increased by 2mm from the gap between the lower dies.
The first embodiment is as follows:
mixing a silica gel A agent and a silica gel B agent according to a weight ratio of 1;
after coating resin on the carbon fiber, placing the carbon fiber on a molding surface of a molding die for hot pressing;
extruding resin from the carbon fiber by pressure in the hot press molding process in a sealed environment, uniformly filling the resin into a mold cavity, discharging the redundant resin with accumulated air bubbles into an overflow glue groove to prepare a carbon fiber product, and observing that no air bubbles or holes exist on the surface of the carbon fiber product.
The second embodiment:
mixing a silica gel A agent and a silica gel B agent according to a weight ratio of 1.1 to form a composite silica gel liquid, pouring the composite silica gel liquid into a sealing groove of a lower die of a forming die, pressing the upper die downwards, heating and curing the composite silica gel liquid at the temperature of 40 ℃, keeping the gel time for 15min, keeping heating for 60min, and then completely curing to prepare a composite silica gel sealing strip, wherein the hardness is 44 measured by a Vickers hardness tester;
after coating resin on the carbon fiber, placing the carbon fiber on a molding surface of a molding die for hot pressing;
extruding resin from the carbon fiber by pressure in the hot press molding process in a sealed environment, uniformly filling the resin into a mold cavity, discharging the redundant resin with accumulated air bubbles into an overflow glue groove to prepare a carbon fiber product, and observing that no air bubbles or holes exist on the surface of the carbon fiber product.
Example three:
mixing a silica gel A agent and a silica gel B agent according to a weight ratio of 1.2 to form a composite silica gel liquid, pouring the composite silica gel liquid into a sealing groove of a lower die of a forming die, pressing the upper die downwards, heating and curing the composite silica gel liquid at the temperature of 35 ℃, keeping heating for 70min, and then completely curing to prepare a composite silica gel sealing strip, wherein the hardness of the composite silica gel sealing strip is 48 as measured by a Vickers hardness tester;
after coating resin on the carbon fiber, placing the carbon fiber on a molding surface of a molding die for hot pressing;
extruding resin from the carbon fiber by pressure in the hot press molding process in a sealed environment, uniformly filling the resin into a mold cavity, discharging the redundant resin with accumulated air bubbles into an overflow glue groove to prepare a carbon fiber product, and observing that no air bubbles or holes exist on the surface of the carbon fiber product.
Example four:
mixing a silica gel A agent and a silica gel B agent according to a weight ratio of 1.3 to form a composite silica gel liquid, pouring the composite silica gel liquid into a sealing groove of a lower die of a forming die, pressing the upper die downwards, heating and curing the composite silica gel liquid at the temperature of 45 ℃, keeping the gel time for 19min, keeping heating for 70min, and then completely curing to prepare a composite silica gel sealing strip, wherein the hardness is 51 measured by a Vickers hardness tester;
after coating resin on the carbon fiber, placing the carbon fiber on a molding surface of a molding die for hot pressing;
extruding resin from the carbon fiber by pressure in the hot press molding process in a sealed environment, uniformly filling the resin into a mold cavity, discharging redundant resin with accumulated air bubbles into a glue overflow groove to prepare a carbon fiber product, and observing that the convex part on the carbon fiber product has a slight glue shortage phenomenon.
It can be seen from the above embodiments that the vickers hardness of the silica gel sealing strip suitable for manufacturing carbon fiber products without bubbles and holes is 42-48, while the vickers hardness of the universal sealing strip on the market at present is about 64, and the hardness of the universal sealing strip is much greater than that of the silica gel sealing strip in the invention. The composite silica gel sealing strip provided by the invention has lower hardness and large compression amount, and the upper die can compress the composite silica gel sealing strip to a large compression amount when being pressed down, so that the cavity is completely sealed, necessary pressure is provided, and the production quality of carbon fiber products can be well ensured.
The principle of the invention is as follows: when the mould is when the hot pressing carbon fiber product, because the decrement of compound silica gel sealing strip is greater than the decrement of resin, consequently can also guarantee the leakproofness of mould under the condition that does not influence the resin compression, make the mould inside can form an inclosed environment, stop gas leakage, prevent that resin from flowing out the mould through the gap under the high pressure, cause carbon fiber product surface to lack gluey. The mould leans on pressure to extrude resin from the carbon fiber at the hot briquetting in-process, evenly fills in the mould die cavity to guarantee that carbon fiber product higher protruding position also can fully fill the resin on the mould die joint, and the bubble also can collect in overflowing gluey groove along with the flow of unnecessary resin, effectively guaranteed carbon fiber product's surface quality, can not appear a large amount of bubbles and the phenomenon of scarce glue on the product surface. The bubbles generated in the curing process are discharged and concentrated in the glue overflowing groove, because the compression amount of the resin is greater than that of the carbon fibers in the curing process, the bubbles are concentrated in the area with large deformation amount, and thus a bubble enrichment area is formed. Therefore, the problem of air bubbles in the forming process can be solved by using the composite silica gel sealing strip with proper hardness and the glue overflowing groove.
The composite silica gel sealing strip and the method for preparing bubble-free carbon fiber products according to the present invention are described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited to the above embodiments, and it falls within the scope of the present invention as long as various modifications are made by the method concept and technical solution of the present invention, or the present invention can be directly applied to other occasions without any modification.
Claims (3)
1. A method for preparing bubble-free carbon fiber products is characterized by comprising the following preparation steps:
(a) Mixing the silica gel A agent and the silica gel B agent in proportion to form composite silica gel liquid, pouring the composite silica gel liquid into a sealing groove of a lower die of a forming die, heating and curing the composite silica gel liquid after the upper die is pressed down to form a composite silica gel sealing strip;
the composite silica gel liquid comprises the following components in parts by weight, wherein the weight ratio of a silica gel agent A to a silica gel agent B is = 1-1.2; the Vickers hardness of the composite silica gel sealing strip is 42-48;
the silica gel A agent comprises 99.9 wt% of monovinyl-terminated dimethyl (siloxane and polysiloxane), and 0.1 wt% of platinum (0) -1, 3-divinyl-1, 3-tetramethyldisiloxane; the silica gel B agent comprises 30 weight percent of polymethylhydrosiloxane and 70 weight percent of monovinyl-terminated dimethyl (siloxane and polysiloxane);
(b) Arranging a glue overflow groove on a lower die of the forming die, wherein the glue overflow groove is positioned between a product forming surface and a sealing groove;
(c) After coating resin on the carbon fiber, placing the carbon fiber on a molding surface of a molding die for hot pressing;
(d) And extruding resin from the carbon fibers by pressure in the hot-press molding process in a sealed environment, uniformly filling the resin into a mold cavity, and discharging the redundant resin with accumulated air bubbles into an overflow glue groove to prepare the carbon fiber product without air bubble holes.
2. The method for preparing bubble-free carbon fiber product according to claim 1, wherein the temperature of the composite silica gel liquid is 35-45 ℃ and the heating is maintained for at least 60min.
3. The method for preparing bubble-free carbon fiber products as claimed in claim 1, wherein the mixed silica gel liquid overflows the sealing groove after filling the sealing groove, and the gap between the upper mold and the lower mold is increased by 2mm after the upper mold is pressed down when the mixed silica gel liquid is heated.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2506892B1 (en) * | 1981-06-01 | 1988-09-09 | Hutchinson Mapa | BYPASS CONNECTION ON FLEXIBLE PIPE AND ITS INSTALLATION METHOD |
| CN103407175B (en) * | 2013-07-30 | 2016-03-16 | 北京航空航天大学 | A kind of integral forming method of fiber-reinforced resin matrix compound material wing box |
| CN105440685A (en) * | 2015-11-29 | 2016-03-30 | 郑臣钏 | Automobile sealing strip production process |
| CN106808711A (en) * | 2015-12-01 | 2017-06-09 | 宁波华翔汽车纤维研发有限公司 | A kind of rapid shaping wet method mould pressing process of carbon fiber auto parts and components |
| CN106827366A (en) * | 2016-12-13 | 2017-06-13 | 柳州通为机械有限公司 | Automotive seat soft seal foaming mould |
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|---|---|---|---|---|
| CN101417152A (en) * | 2007-09-18 | 2009-04-29 | 科迪斯公司 | Local vascular delivery with the mTOR inhibitor of peroxisome Proliferator-activated receptor stimulant associating |
| EP2100729A1 (en) * | 2008-03-13 | 2009-09-16 | Alcan Technology & Management Ltd. | Multilayer film for packaging for thermal treatment |
| CN101564896A (en) * | 2009-06-09 | 2009-10-28 | 深圳市欧亚瑞碳纤维科技有限公司 | Vacuum rush gum forming method of fiber-reinforced resin matrix compound material |
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Denomination of invention: A composite silicone sealing strip and a method for preparing bubble free carbon fiber products Granted publication date: 20230331 Pledgee: Zhaoqing SME Financing Guarantee Co.,Ltd. Pledgor: GUANGDONG YATAI NEW MATERIAL TECHNOLOGY Co.,Ltd.|Guangdong Yaxin Nonmetallic Material Technology Co.,Ltd.|GUANGDONG ASIA-PACIFIC LIGHTWEIGHT TECHNOLOGY RESEARCH Co.,Ltd. Registration number: Y2024980002168 |