CN115195237A - Flexible graphite sealing plate and preparation method thereof - Google Patents
Flexible graphite sealing plate and preparation method thereof Download PDFInfo
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- CN115195237A CN115195237A CN202210867340.9A CN202210867340A CN115195237A CN 115195237 A CN115195237 A CN 115195237A CN 202210867340 A CN202210867340 A CN 202210867340A CN 115195237 A CN115195237 A CN 115195237A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 76
- 239000010439 graphite Substances 0.000 title claims abstract description 76
- 238000007789 sealing Methods 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 87
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 52
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 28
- 229920001568 phenolic resin Polymers 0.000 claims description 28
- 239000005011 phenolic resin Substances 0.000 claims description 28
- 239000006229 carbon black Substances 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- 229920001778 nylon Polymers 0.000 claims description 22
- 238000000465 moulding Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 2
- 239000013521 mastic Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 15
- 230000032798 delamination Effects 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 15
- 229920002554 vinyl polymer Polymers 0.000 description 10
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 5
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 5
- YYROPELSRYBVMQ-UHFFFAOYSA-N 4-toluenesulfonyl chloride Chemical compound CC1=CC=C(S(Cl)(=O)=O)C=C1 YYROPELSRYBVMQ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 229920006122 polyamide resin Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- RBNPOMFGQQGHHO-UHFFFAOYSA-N glyceric acid Chemical compound OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polyoxypropylene ethylene oxide glycerol Polymers 0.000 description 2
- 239000005028 tinplate Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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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
- B32B5/026—Knitted 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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
- B32B5/06—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 characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
-
- 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
-
- 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
-
- 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
- B32B2262/0261—Polyamide 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
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The present invention provides a flexible graphite sealing plate, comprising: the base layer comprises a first hanging net, wherein the first hanging net is provided with two sides, and the two sides are coated with graphite slurry layers; the two covering layers comprise second hanging nets, the first hanging net is clamped between the two second hanging nets, and a solidified slurry layer is also arranged between each second hanging net and the first hanging net; connecting nets are arranged between the two surfaces of the first hanging net and the adjacent second hanging net respectively, and the connecting nets are interwoven between the graphite slurry layer and the solidified slurry layer; and a sealing slurry layer is coated outside the two covering layers. The invention also provides a preparation method of the sealing plate, the obtained flexible graphite sealing plate can enable the forming thickness to reach 4.22-9.16mm, and the delamination phenomenon does not occur between the composite layers after forming.
Description
Technical Field
The invention relates to the technical field of graphite sealing plates, in particular to a flexible graphite sealing plate and a preparation method thereof.
Background
The graphite sealing plate is formed by solidifying graphite slurry. For example, CN106189058a in the prior art discloses a flexible graphite composite board, which comprises the following raw materials in parts by weight: 50-100 parts of expanded graphite powder, 40-90 parts of phenolic resin, 1-10 parts of polyamide resin, 5-30 parts of polyvinyl formal and/or polyvinyl acetal, 20-120 parts of alcohol, 1-5 parts of coupling agent, 1-5 parts of defoaming agent, 1-10 parts of carbon black and 1-5 parts of curing agent, and the raw materials are uniformly mixed to prepare slurry during preparation; then directly coating the slurry on the upper surface and the lower surface of a nylon net or a tinplate by adopting a scraper coater, and drying the nylon net or the tinplate to form a sheet-shaped object; and then carrying out hot press molding, and finally demoulding and cooling to obtain a graphite composite plate finished product. The graphite composite plate is a flexible graphite sealing plate, the thickness of the obtained sealing plate is small, the forming thickness is increased, a thicker sealing plate can be obtained, and the problem of delamination easily occurs between composite layers of the obtained sealing plate.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a flexible graphite sealing plate, which solves the problem that delamination occurs between composite layers due to the fact that the flexible graphite sealing plate is increased in forming thickness in the prior art.
According to an embodiment of the invention, a flexible graphite sealing sheet comprises:
the base layer comprises a first hanging net, wherein the first hanging net is provided with two sides, and the two sides are coated with graphite slurry layers;
the two covering layers comprise second hanging nets, the first hanging net is clamped between the two second hanging nets, and a solidified slurry layer is also arranged between each second hanging net and the first hanging net;
connecting nets are arranged between the two surfaces of the first hanging net and the adjacent second hanging net respectively, and the connecting nets are interwoven between the graphite slurry layer and the solidified slurry layer;
and a sealing slurry layer is coated outside the two covering layers.
In the above embodiment, the first hanging net, the two second hanging nets and the connecting net form a grid three-dimensional supporting structure, so that the connection of the ends between the composite layers (i.e., the graphite slurry layer, the curing slurry layer and the sealing slurry layer) is tighter, the forming thickness can be increased continuously, and the problem of delamination between the composite layers caused by the increase of the forming thickness of the flexible graphite sealing plate in the prior art is solved.
According to another embodiment of the present invention, there is also provided a method for manufacturing the above flexible graphite sealing sheet, including:
connecting nylon fiber yarns on two sides of a first hanging net, coating a graphite slurry layer on the two sides of the first hanging net, and airing for 20-30min;
secondly, coating a curing slurry layer on two sides of the product obtained in the first step respectively, wherein the nylon fiber yarns on the first hanging net sequentially penetrate through the graphite slurry layer and the curing slurry layer;
thirdly, covering a second hanging net on the two solidified slurry layers respectively to enable the nylon fiber yarns on the first hanging net to extend out of the second hanging net, and performing hot-press molding for 10-15min;
and fourthly, coating a sealing slurry layer on two sides of the product obtained in the third step, and performing hot press molding for 20-30min to obtain the flexible graphite sealing plate.
Compared with the prior art, the invention has the following beneficial effects:
the flexible graphite sealing plate can enable the forming thickness to reach 4.22-9.16mm, and delamination phenomenon does not occur between composite layers after forming, so that the flexible graphite sealing plate has better stability than the prior art.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
in the above drawings:
the device comprises a first hanging net 1, a graphite slurry layer 2, a second hanging net 3, a solidified slurry layer 4, a connecting net 5 and a slurry sealing layer 6.
Detailed Description
The technical solution of the present invention is further described with reference to the drawings and the embodiments.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Example 1
As shown in fig. 1, the present embodiment provides a flexible graphite sealing sheet, which includes:
the base layer comprises a first hanging net 1, wherein the first hanging net 1 is provided with two sides, and graphite slurry layers 2 are coated on the two sides;
the coating comprises two covering layers, wherein each covering layer comprises a second hanging net 3, the first hanging net 1 is clamped between the two second hanging nets 3, and a solidified slurry layer 4 is also arranged between each second hanging net 3 and the first hanging net 1;
connecting nets 5 are respectively arranged between the two surfaces of the first hanging net 1 and the second hanging net 3 adjacent to the first hanging net, and the connecting nets 5 are interwoven between the graphite slurry layer 2 and the solidified slurry layer 4;
and a sealing slurry layer 6 is coated outside the two covering layers.
In the above embodiment, the first hanging net 1, the second hanging net 3 and the connecting net 5 are all made of polyester fibers or nylon fibers by weaving, and the first hanging net 1, the two second hanging nets 3 and the connecting net 5 form a grid three-dimensional supporting structure, so that the connection of the ends between the composite layers (namely the graphite slurry layer 2, the curing slurry layer 4 and the sealing slurry layer 6) is tighter, and finally, the forming thickness can be continuously increased, thereby solving the problem that the delamination occurs between the composite layers when the forming thickness of the flexible graphite sealing plate is increased in the prior art.
Preferably, the graphite slurry layer 2 comprises phenolic resin, p-toluenesulfonic acid, graphite powder and carbon black, wherein the mass ratio of the phenolic resin to the p-toluenesulfonic acid is 10:0.5; the cured slurry layer 4 comprises phenolic resin, p-toluenesulfonic acid, graphite powder and carbon black, wherein the mass ratio of the phenolic resin to the p-toluenesulfonic acid is 10:1; the sealing slurry layer 6 comprises phenolic resin, p-toluenesulfonic acid, graphite powder and carbon black, wherein the mass ratio of the phenolic resin to the p-toluenesulfonic acid is 10:2, in the structure of flexible graphite closing plate, by the first net 1 of hanging of inlayer outwards, p-toluenesulfonic acid content is more and more for outer solidification is faster, more stable, and finally it is better to make overall structure stabilize, and the problem of delaminating between the composite bed can not appear in the flexible graphite closing plate of gained.
Example 2
A preparation method of a flexible graphite sealing plate comprises the following steps:
step one, uniformly mixing 60kg of phenolic resin, 100kg of graphite powder, 8kg of carbon black and 50kg of absolute ethyl alcohol, then adding 3kg of p-toluenesulfonic acid, and continuously and uniformly mixing to obtain graphite slurry layer slurry;
step two, uniformly mixing 60kg of phenolic resin, 100kg of graphite powder, 8kg of carbon black and 50kg of absolute ethyl alcohol, adding 6kg of p-toluenesulfonic acid, and continuously uniformly mixing to obtain cured slurry layer slurry;
thirdly, uniformly mixing 60kg of phenolic resin, 100kg of graphite powder, 8kg of carbon black and 50kg of absolute ethyl alcohol, then adding 12kg of p-toluenesulfonic acid, and continuously and uniformly mixing to obtain slurry of a sealing layer;
fourthly, connecting nylon fiber yarns on two sides of a first net with the size of 50 x 100cm, coating a graphite slurry layer on the two sides of the first net, and airing for 30min;
fifthly, coating a curing slurry layer on two sides of the product obtained in the first step respectively, wherein the nylon fiber yarns on the first hanging net sequentially penetrate through the graphite slurry layer and the curing slurry layer;
sixthly, respectively covering a second hanging net on the two cured slurry layers so that the nylon fiber yarns on the first hanging net extend out of the second hanging net, and performing hot press molding for 15min at the temperature of 150 ℃ and under the pressure of 8 MPa;
seventhly, coating sealing slurry layers on two surfaces of the product obtained in the third step, and performing hot press molding for 30min at the temperature of 150 ℃ and under the pressure of 8Mpa to obtain the flexible graphite sealing plate with the thickness of 9.16 mm.
Example 3
A preparation method of a flexible graphite sealing plate comprises the following steps:
step one, uniformly mixing 45kg of phenolic resin, 75kg of graphite powder, 5kg of carbon black and 40kg of absolute ethyl alcohol, adding 2.2kg of p-toluenesulfonic acid, and continuously and uniformly mixing to obtain graphite slurry layer slurry;
step two, uniformly mixing 45kg of phenolic resin, 80kg of graphite powder, 5kg of carbon black and 40kg of absolute ethyl alcohol, adding 5kg of p-toluenesulfonic acid, and continuously uniformly mixing to obtain slurry of the cured slurry layer;
step three, uniformly mixing 45kg of phenolic resin, 85kg of graphite powder, 5kg of carbon black and 40kg of absolute ethyl alcohol, adding 8kg of p-toluenesulfonic acid, and continuously uniformly mixing to obtain sealing slurry;
fourthly, connecting nylon fiber yarns on two sides of a first net with the size of 50 x 100cm, coating a graphite slurry layer on the two sides of the first net, and airing for 25min;
fifthly, coating a curing slurry layer on two sides of the product obtained in the first step respectively, wherein the nylon fiber yarns on the first hanging net sequentially penetrate through the graphite slurry layer and the curing slurry layer;
sixthly, respectively covering a second hanging net on the two cured slurry layers to enable the nylon fiber yarns on the first hanging net to extend out of the second hanging net, and carrying out hot press molding for 12min at the temperature of 150 ℃ and under the pressure of 8 MPa;
and seventhly, coating sealing slurry layers on two surfaces of the product obtained in the third step, and performing hot press molding at 150 ℃ and 8Mpa for 25min to obtain the flexible graphite sealing plate with the thickness of 7.54 mm.
Example 4
A preparation method of a flexible graphite sealing plate comprises the following steps:
step one, uniformly mixing 30kg of phenolic resin, 50kg of graphite powder, 1kg of carbon black and 30kg of absolute ethyl alcohol, then adding 1.5kg of p-toluenesulfonic acid, and continuously and uniformly mixing to obtain graphite slurry layer slurry;
step two, uniformly mixing 30kg of phenolic resin, 60kg of graphite powder, 3kg of carbon black and 30kg of absolute ethyl alcohol, then adding 3kg of p-toluenesulfonic acid, and continuously uniformly mixing to obtain slurry of the cured slurry layer;
thirdly, uniformly mixing 30kg of phenolic resin, 70kg of graphite powder, 3kg of carbon black and 30kg of absolute ethyl alcohol, then adding 6kg of p-toluenesulfonic acid, and continuously and uniformly mixing to obtain slurry of a sealing layer;
fourthly, connecting nylon fiber yarns on two sides of a first net with the size of 50 x 100cm, coating a graphite slurry layer on the two sides of the first net, and airing for 20min;
fifthly, coating a curing slurry layer on two sides of the product obtained in the first step respectively, wherein the nylon fiber yarns on the first hanging net sequentially penetrate through the graphite slurry layer and the curing slurry layer;
sixthly, covering a second hanging net on the two solidified slurry layers respectively to enable the nylon fiber yarns on the first hanging net to extend out of the second hanging net, and performing hot-press molding for 10min at the temperature of 150 ℃ and under the pressure of 8 MPa;
seventhly, coating a sealing slurry layer on two sides of the product obtained in the third step, and performing hot press molding for 20min at the temperature of 150 ℃ and under the pressure of 8Mpa to obtain the flexible graphite sealing plate with the thickness of 4.22 mm.
Comparative example 1 (CN 106189058A)
A graphite composite sheet comprising the following raw materials in kg: 50kg of expanded graphite powder, 40kg of phenolic resin, 10kg of polyamide resin, 10kg of polyvinyl formal and polyvinyl acetal, 40kg of alcohol, 2kg of silane coupling agent, 2kg of polyoxypropylene ethylene oxide glycerol ether, 5kg of carbon black, and 1kg of diluent of tosyl chloride and absolute ethyl alcohol according to a mass ratio of 1;
the method comprises the following specific steps:
1) Adding polyvinyl formal and polyvinyl acetal into alcohol, uniformly mixing until the polyvinyl formal and the polyvinyl acetal are completely dissolved, then adding phenolic resin and polyamide resin, uniformly mixing, adding a defoaming agent, uniformly mixing, adding expanded graphite powder, carbon black and a coupling agent, preparing into slurry, and finally adding p-toluenesulfonic acid into the slurry;
2) Directly coating the slurry obtained in the step 1) on the upper surface and the lower surface of a nylon net by adopting a scraper coater, and drying the nylon net at 60 ℃ for 10 minutes to form a sheet-shaped object; and then carrying out hot press molding at 120 ℃ and 6Mpa for 30 minutes, finally demoulding and cooling to obtain a graphite composite plate finished product, wherein the thickness of the coating molding is 2mm, and the thickness of the coating molding is 0.16mm after the hot press molding.
Comparative example 2
The same as in comparative example 1 except for the following points:
80kg of expanded graphite powder, 60kg of phenolic resin, 20kg of polyamide resin, 20kg of polyvinyl formal and polyvinyl acetal, 80kg of alcohol, 4kg of silane coupling agent, 3kg of polyoxypropylene ethylene oxide glycerol ether, 10kg of carbon black, and 1kg of diluent of tosyl chloride and absolute ethyl alcohol according to a mass ratio of 1;
the thickness of the coating molding is 5mm, and the thickness of the coating molding is 0.43mm after hot press molding.
The flexible graphite sealing sheets provided in examples 2-4 and comparative examples 1 and 2 were compared and the results are shown below:
note: the flexible graphite sealing plate cut to the size of 10cm × 20cm is effectively bent for 10 times, and then whether the composite layer delamination phenomenon exists is observed, and two ends of the flexible graphite sealing plate in the length direction are folded in half during bending, so that the distance between the two ends is shortened to 12cm, and the flexible graphite sealing plate is effectively bent once.
The flexible graphite sealing plates provided by the examples 1-4 of the invention can not be delaminated after being folded in half when the thickness is more than 4mm, and the comparison examples can not be delaminated when the thickness is less than 2mm, and can be delaminated when the thickness is more than 4mm, which shows that the flexible graphite sealing plates provided by the invention have better stability.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A flexible graphite seal sheet, comprising:
the base layer comprises a first hanging net, wherein the first hanging net is provided with two sides, and the two sides are coated with graphite slurry layers;
the two covering layers comprise second hanging nets, the first hanging net is clamped between the two second hanging nets, and a solidified slurry layer is also arranged between each second hanging net and the first hanging net;
connecting nets are arranged between the two surfaces of the first hanging net and the second hanging net adjacent to the first hanging net respectively, and the connecting nets are arranged between the graphite slurry layer and the solidified slurry layer in an interlaced mode;
and a sealing slurry layer is coated outside the two covering layers.
2. The flexible graphite seal sheet of claim 1, wherein the first and second netting and the connecting netting are woven from polyester or nylon fibers.
3. The flexible graphite seal sheet of claim 1, wherein the graphite slurry layer comprises phenolic resin, p-toluenesulfonic acid, graphite powder, and carbon black, wherein the mass ratio of phenolic resin to p-toluenesulfonic acid is 10:0.5.
4. the flexible graphite seal sheet of claim 1, wherein the cured slurry layer comprises phenolic resin, p-toluenesulfonic acid, graphite powder, and carbon black, wherein the mass ratio of phenolic resin to p-toluenesulfonic acid is 10:1.
5. the flexible graphite sheet seal of claim 1, wherein the layer of mastic comprises phenolic resin, p-toluenesulfonic acid, graphite powder, and carbon black, wherein the mass ratio of phenolic resin to p-toluenesulfonic acid is 10:2.
6. the method of making a sheet of flexible graphite sealing of any one of claims 1 to 5, comprising:
connecting nylon fiber yarns on two sides of a first hanging net, coating a graphite slurry layer on the two sides of the first hanging net, and airing for 20-30min;
secondly, coating a curing slurry layer on two sides of the product obtained in the first step respectively, wherein the nylon fiber yarns on the first hanging net sequentially penetrate through the graphite slurry layer and the curing slurry layer;
thirdly, covering a second hanging net on the two cured slurry layers respectively to enable the nylon fiber yarns on the first hanging net to exceed the second hanging net, and performing hot-press molding for 10-15min;
and fourthly, coating a sealing slurry layer on two sides of the product obtained in the third step, and performing hot press molding for 20-30min to obtain the flexible graphite sealing plate.
7. The method of making a flexible graphite seal sheet of claim 6, wherein the nylon filaments connected to the first screen are interlaced to form a connecting web.
8. The method of manufacturing a flexible graphite sealing sheet according to claim 6, wherein the graphite slurry layer comprises 30 to 60 parts by weight of phenolic resin, 50 to 100 parts by weight of graphite powder, 1 to 8 parts by weight of carbon black and 1.5 to 3 parts by weight of p-toluenesulfonic acid.
9. The method of manufacturing a sealing sheet of flexible graphite according to claim 6, wherein the cured slurry layer comprises 30 to 60 parts by weight of phenolic resin, 60 to 100 parts by weight of graphite powder, 3 to 8 parts by weight of carbon black and 3 to 6 parts by weight of p-toluenesulfonic acid.
10. The method of making a flexible graphite sealing sheet according to claim 6, wherein the sealing layer comprises 30-60 parts by weight of phenolic resin, 70-100 parts by weight of graphite powder, 5-8 parts by weight of carbon black and 6-12 parts by weight of p-toluenesulfonic acid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210867340.9A CN115195237A (en) | 2022-07-22 | 2022-07-22 | Flexible graphite sealing plate and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210867340.9A CN115195237A (en) | 2022-07-22 | 2022-07-22 | Flexible graphite sealing plate and preparation method thereof |
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| CN115195237A true CN115195237A (en) | 2022-10-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060069721A (en) * | 2004-12-18 | 2006-06-22 | 금호석유화학 주식회사 | Method for producing non-inflammable pre-expanded polystyrene beads that keeps its shape when it burnt containing expandable graphite |
| CN104589724A (en) * | 2014-12-24 | 2015-05-06 | 中国建筑材料科学研究总院 | Stitched laminar flexible heat insulation material and preparation method thereof |
| CN104647864A (en) * | 2015-01-01 | 2015-05-27 | 三峡大学 | Preparation method of graphite composite plank |
| CN106189058A (en) * | 2016-07-18 | 2016-12-07 | 宜昌新成石墨有限责任公司 | A kind of soft graphite composite board and preparation method thereof |
| CN110938280A (en) * | 2018-09-25 | 2020-03-31 | 青岛三合永昶机械有限公司 | Graphite composite board and preparation method thereof |
-
2022
- 2022-07-22 CN CN202210867340.9A patent/CN115195237A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060069721A (en) * | 2004-12-18 | 2006-06-22 | 금호석유화학 주식회사 | Method for producing non-inflammable pre-expanded polystyrene beads that keeps its shape when it burnt containing expandable graphite |
| CN104589724A (en) * | 2014-12-24 | 2015-05-06 | 中国建筑材料科学研究总院 | Stitched laminar flexible heat insulation material and preparation method thereof |
| CN104647864A (en) * | 2015-01-01 | 2015-05-27 | 三峡大学 | Preparation method of graphite composite plank |
| CN106189058A (en) * | 2016-07-18 | 2016-12-07 | 宜昌新成石墨有限责任公司 | A kind of soft graphite composite board and preparation method thereof |
| CN110938280A (en) * | 2018-09-25 | 2020-03-31 | 青岛三合永昶机械有限公司 | Graphite composite board and preparation method thereof |
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