CN115157519B - Integral forming process for coating adhesion-promoting layer on rubber capsule of transformer oil conservator - Google Patents
Integral forming process for coating adhesion-promoting layer on rubber capsule of transformer oil conservator Download PDFInfo
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- CN115157519B CN115157519B CN202210839928.3A CN202210839928A CN115157519B CN 115157519 B CN115157519 B CN 115157519B CN 202210839928 A CN202210839928 A CN 202210839928A CN 115157519 B CN115157519 B CN 115157519B
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- 239000002775 capsule Substances 0.000 title claims abstract description 115
- 239000011248 coating agent Substances 0.000 title claims abstract description 42
- 238000000576 coating method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 39
- 229920001971 elastomer Polymers 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 title claims abstract description 28
- 239000004744 fabric Substances 0.000 claims abstract description 58
- 239000002390 adhesive tape Substances 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 46
- 239000000853 adhesive Substances 0.000 claims abstract description 30
- 230000001070 adhesive effect Effects 0.000 claims abstract description 30
- 239000004753 textile Substances 0.000 claims abstract description 18
- 238000003860 storage Methods 0.000 claims abstract description 16
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 108
- 238000010438 heat treatment Methods 0.000 claims description 55
- 238000004513 sizing Methods 0.000 claims description 47
- 239000002904 solvent Substances 0.000 claims description 30
- 239000003292 glue Substances 0.000 claims description 20
- 238000007689 inspection Methods 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 15
- 230000001737 promoting effect Effects 0.000 claims description 14
- 239000012945 sealing adhesive Substances 0.000 claims description 14
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 12
- 229920001568 phenolic resin Polymers 0.000 claims description 12
- 239000005011 phenolic resin Substances 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 238000004026 adhesive bonding Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 230000007547 defect Effects 0.000 claims description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 6
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- 238000004073 vulcanization Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
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- 238000013329 compounding Methods 0.000 claims description 4
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- 230000037303 wrinkles Effects 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 229920005992 thermoplastic resin Polymers 0.000 claims description 2
- 238000010187 selection method Methods 0.000 claims 2
- 238000004140 cleaning Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 35
- 239000012790 adhesive layer Substances 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
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- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000007667 floating Methods 0.000 abstract description 2
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- 239000002574 poison Substances 0.000 abstract description 2
- 231100000614 poison Toxicity 0.000 abstract description 2
- 238000007731 hot pressing Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
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- 239000004312 hexamethylene tetramine Substances 0.000 description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- VJMAITQRABEEKP-UHFFFAOYSA-N [6-(phenylmethoxymethyl)-1,4-dioxan-2-yl]methyl acetate Chemical compound O1C(COC(=O)C)COCC1COCC1=CC=CC=C1 VJMAITQRABEEKP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- XENVCRGQTABGKY-ZHACJKMWSA-N chlorohydrin Chemical compound CC#CC#CC#CC#C\C=C\C(Cl)CO XENVCRGQTABGKY-ZHACJKMWSA-N 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920006112 polar polymer Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
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- 230000035882 stress Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/34—Feeding the material to the mould or the compression means
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/50—Removing moulded articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention belongs to the technical field of transformer accessory preparation, and particularly relates to an integral forming process of a rubber capsule coating adhesion-promoting layer of a transformer oil storage cabinet. The invention changes the combination structure of the main adhesive tape of the capsule, and a layer of tackifying adhesive solution with extremely strong adhesive force is coated between the adhesive layer and the textile fabric, so that the adhesive material and the textile fabric of the framework layer form firm chemical bond combination, the bad phenomena of capsule wall separation, foaming, slotting and degumming do not occur in the process of dynamic floating up and down in an oil cabinet, the service life of the capsule is prolonged, and meanwhile, the novel RE-21-12 automatic hot press is adopted for integral molding, so that the appearance, performance and quality of the capsule are obviously improved, and especially, heavy manual molding is thoroughly eliminated, the poison and pollution of organic solution are thrown away, and the environmental protection requirement is met.
Description
Technical Field
The invention belongs to the technical field of transformer accessory preparation, and particularly relates to an integral forming process of a rubber capsule coating adhesion-promoting layer of a transformer oil storage cabinet.
Background
The rubber capsule and the diaphragm of the transformer oil storage cabinet are matched products of the transformer, the inside of the capsule is contacted with the atmosphere through a breathing tube and a moisture absorber, the outside of the capsule is contacted with transformer oil, the transformer oil is used as an insulating medium in the transformer or a capacitor, and the volume of the transformer oil is also changed due to heat or external temperature change generated during operation. When the temperature is high, the volume of the transformer oil expands, the volume of the oil storage cabinet capsule is reduced to compensate, and when the temperature is reduced, the volume of the transformer oil is reduced, and the volume of the oil storage cabinet capsule is increased to compensate. In particular, the pressure difference in the oil storage cabinet can be flexibly compensated along with the temperature change of the transformer. The transformer oil is effectively isolated from being contacted with air, H 2 O and O 2 in the air are prevented from invading the oil surface, the degradation of the oil is prevented, the service life of the transformer is prolonged, and the long-term safe operation of the transformer is ensured.
The manufacturing process of the rubber capsule of the transformer is carried out by manually attaching and molding the rubberized fabric which is formed by calendaring the high-strength nylon silk double-sided adhesive oil-resistant rubber and vulcanizing the rubberized fabric in a vulcanizing tank in seventies. Although the use performance of the manufacturing process can meet the technical requirements, with the continuous development of large-scale power transmission and transformation projects, high-capacity and high-parameter transformers are continuously increased, the specification and model of capsules are also continuously increased along with the daily increase, and the requirements on various performances of the capsules are also continuously improved; accordingly, there remains a need for further improvements and enhancements to the technical requirements and manufacturing process of rubber capsules.
Disclosure of Invention
The rubber capsule of the oil storage cabinet of the transformer is immersed in transformer oil for a long time, the inside of the rubber capsule is contacted with the atmosphere through a breathing pipe and a moisture absorber, heat generated in operation or external temperature change occurs, the volume of the oil is changed in expansion and shrinkage, the rubber capsule in the oil storage cabinet needs to flexibly compensate the pressure difference in the oil storage cabinet along with the change of the temperature of the transformer oil, and the rubber capsule is in a motion state in the cabinet; therefore, the capsule wall must have a high breaking strength, and more importantly, a high adhesion force between the adhesive layer of the adhesive tape itself and the textile fabric.
In order to overcome the defects, the invention provides an integral forming process for coating an adhesion promoting layer on a rubber capsule of a transformer oil storage cabinet. The invention changes the combination structure of the main adhesive tape of the capsule, and coats a layer of tackifying adhesive solution with extremely strong adhesive force between the adhesive layer and the textile fabric, so that the adhesive material and the textile fabric of the framework layer form firm chemical bond combination, thereby ensuring that the adverse phenomena of capsule wall separation, foaming, slotting and degumming do not occur in the process of dynamic floating of the capsule up and down in the oil cabinet, and prolonging the service life of the capsule. Meanwhile, the novel RE-21-12 automatic hot press is adopted for integral molding, so that the appearance, performance and quality of the capsule are obviously improved, particularly heavy manual molding is thoroughly eliminated, the poison and pollution of organic solution are thrown away, and the environmental protection requirement is met.
In order to meet the requirements, the technical scheme of the invention is as follows.
An integrated forming process for coating an adhesion promoting layer on a rubber capsule of a transformer oil storage cabinet specifically comprises the following steps:
And 1, preparing the tackifying layer glue solution.
Using nitrile rubber-40 as main sizing material of the tackifying layer, and preparing a film by the conventional procedure of compounding agent sizing material according to the sizing material formula of the tackifying layer; returning the qualified tackified layer sizing material to a roll mill to obtain a 3-5mm film, cutting the film into small blocks of about 10cm 2, and preparing an ethyl acetate solvent; firstly, putting small blocks of sizing material into a stirrer, then putting 1/3 of the total weight of ethyl acetate into the stirrer, when the swelling of the film begins to dissolve, pouring 1/4 of the 2/3 of the total weight of the rest ethyl acetate solvent into the stirrer, continuously stirring to the extent that no sizing block exists, finally pouring the rest ethyl acetate solvent into a tank, uniformly stirring, and filtering by a 100-mesh screen for later use.
And step2, coating tackifying glue solution.
And (3) adopting a horizontal scraper gumming machine to lead the dried J9211 brocade silk to be cloth-connected, and coating the single surface for 2 times according to the process gumming amount.
And 3, drying.
After the coating is finished, the coating is heated and dried by a heating plate, the solution in the coating liquid is volatilized, and the coating liquid is curled by a cloth liner.
And 4, double-sided rubberizing.
Firstly, placing a curled coated fabric roll on a roll frame of a calender to prepare grey fabric, then adjusting the roll temperature, the roll spacing and the film thickness, starting to carry out double-sided adhesive bonding of a main body butyronitrile-26 rubber material on the calender, curling with clean cloth after double-sided adhesive bonding, and placing on the frame to prepare a formed capsule for use.
And 5, integrally forming the capsule.
(1) Setting the temperature of the RE-21-12 hot press to be between 80 and 85 ℃;
(2) Cutting: the surface of the rolled double-sided adhesive tape after 12 hours of standing was subjected to quality inspection, and the adhesive tape was not allowed to have perforation, fabric breakage, air bubbles and dewing phenomena, and the inspection standard was performed in accordance with (Q/TT J32.07.18-2017). Cutting and preparing the qualified adhesive tape according to the specification and the model of the drawing;
(3) And (3) forming: after the overlapping width of the adhesive tape of the capsule main body is 25 (+ -5) mm and the body-head overlapping is 20mm, the overlapping area of the adhesive tape of the capsule main body and the inner sealing adhesive tape and the outer sealing adhesive tape are cleaned up by using an ethyl acetate solvent, the central line of the adhesive part of the capsule is simultaneously adjusted to be aligned with the central lines of the upper heating plate and the lower heating plate by a novel hot press station, distortion dislocation is not allowed, no crease and no bubble are generated on the surface, the capsule is placed, the hot press is started immediately after the capsule is put, the hot press station is provided with an upper heating plate and a lower heating plate, the thickness of a rubber plate with certain compression deformation and excellent ageing resistance and high temperature resistance is paved on the upper heating plate and the lower heating plate, the hot press process condition of the adhesive tape overlapping part of the capsule main body is 80-85 ℃ for 3 minutes, and after hot press combination, the upper heating plate is automatically lifted up to remove the heating surface, and the capsule is taken out; and (3) performing appearance quality inspection on the heated part, if defects are found, repairing in time, and then transferring to the next procedure for vulcanization to prepare the final product rubber capsule.
Further, the conventional procedure of the compounding agent sizing material in the step 1 is banburying, mixing, filtering and discharging.
Further, the adhesion promoting layer sizing formula in the step 1 comprises the following components in parts by weight: 100 parts of butyronitrile-40 (Russian), 5-9 parts of ZnO, 1-2 parts of SA, 30-35 parts of spray carbon black, 15-18 parts of dioctyl sebacate, 3-5 parts of accelerator H, 2 parts of accelerator TT, 0.2 part of sulfur and 18-20 parts of 2123 phenolic resin (added during stirring).
Further, the mass ratio of the sizing material to the ethyl acetate solvent in the step 1 is 1:2.5.
Further, the technological parameters of the knife gumming machine in the step 2 are inclined edges with the gap distance between the scraper and the textile fabric being 4-6mm, the temperature is 100-110 ℃, and the roller speed is 10-12 m/min.
Further, the operation condition of the calender in the step 4 is that the roller speed is 10 m/min at the roller temperature of 85-90 ℃, the roller speed is 75-80 ℃ and the roller speed is 50-55 ℃ at the roller temperature, and the speed ratio is 1:1:1. The thickness of the adhesive tape is 0.85-0.95mm on the first surface and 1.2-1.5mm on the second surface.
Compared with the prior art, the invention has the beneficial effects that.
The most critical technical key point of the invention is that the structure of the capsule adhesive tape is changed, and an adhesion promoting layer is added, so that the adhesion strength between the textile of the capsule framework layer and the main adhesive layer is obviously improved, and the adhesion strength can reach more than 450N/50mm (standard 50N/mm). At present, the adhesive strength is improved and the phenomena of separation, fracture, slotting and the like of the capsule cannot occur, which can generally reach 150N/50mm, so that the service life of the capsule is effectively prolonged.
Drawings
Figure 1 is a simplified schematic diagram of a main body adhesive tape.
Detailed Description
The following examples will provide those skilled in the art with a more complete understanding of the present invention and are not intended to limit the invention to the embodiments described.
Based on the running characteristics of the transformer, the rubber capsule is used for better playing engineering benefits, and the main technical key points of the capsule, the formula design of the sizing material, the selection of the fabric of the main body adhesive, the structural design of the adhesive and the manufacturing process technology are adopted.
1. Development of sizing materials and rubberized fabrics:
The main sizing material has good oil resistance, ozone resistance, weather resistance and wear resistance. The tape should have sufficient stretch breaking force, coating adhesive strength and overlap strength. The adhesive tape should have good softness and reciprocating fatigue properties. The rubberized fabric should have excellent air permeation resistance.
Following the principle, key points of development are the adhesive formula of the adhesion promoting layer, the material selection of the framework layer textile and the structural design of the adhesive for further improving the breaking force of the adhesive, the adhesive strength between the adhesive layer and the textile, and the lap joint strength and sealing performance of the capsule per se.
(1) Selection of textiles
The skeleton layer material is particularly important for the use performance of the capsule, is a strong supporting point of the whole capsule, and has the advantages of high strength, good softness, polar groups contained in the molecular structure of the fabric fiber, and capability of forming a good-adhesion fabric with the main body butyronitrile-26 glue. Polyimide, silk and polyester adhesive layer silk and other properties
Table 1 textile performance tables.
From the test data, the J9211 brocade silk has the properties of strength, thickness, density and the like, and is selected as the most suitable material of the capsule skeleton layer.
(2) Development of adhesive formula of adhesion promoting layer
Nitrile rubber, chloroprene rubber, fluorine rubber, chlorohydrin rubber, polyurethane rubber, chlorosulfonated polyethylene rubber and the like are all the objects for selecting oil-resistant rubber materials in the rubber industry, wherein the nitrile rubber is still the first choice for various oil-resistant rubberized fabric products. In order to ensure the adhesive force between the main body rubber (nitrile rubber) of the capsule and the textile, nitrile-40 with good oil resistance and high affinity with polar polymer is selected as the tackifying rubber.
The adhesion problem of nitrile rubber and J9211 brocade silk is based on the adhesion interface theory, and the adhesion interface state is extremely complex and depends on the chemical properties of the fabric surface besides the structure of the yarn. According to the chemical structure analysis of textiles, the amide groups of the J9211 brocade silk can interact with resorcinol and formaldehyde condensate to form chemical bonds, so that high adhesive strength is obtained between the rubber and the J9211 brocade silk, and the reaction is as follows:
。
Therefore, according to the theory, in order to solve the adhesion between the nitrile rubber and the J9211 brocade silk, phenolic resin with good heat resistance is selected for experiments in the formula, and the adhesion effect of the phenolic resin 2123 is obvious through experimental screening and positioning.
2123 Phenolic resin is a thermoplastic resin obtained by polycondensation of phenol and formaldehyde in an acidic medium. Since the molecule does not contain hydroxymethyl groups, the molecules cannot be further condensed to form a body structure, and formaldehyde or formaldehyde donor such as trichloroformaldehyde, hexamethylenetetramine, paraformaldehyde and the like must be used as a curing agent thereof. The accelerator H (hexamethylenetetramine) is selected as a curing agent, and a variable ratio experiment is carried out, wherein the optimal mixing amount is 3-5 parts.
Table 2 comparison of 2123 phenolic resin properties at different loadings.
2. Capsule forming
The novel RE-21-12 automatic hot pressing and mechanical integrated forming process is adopted, so that the heavy manual adhesive brushing process is replaced, and the traditional process of hand roller pressing and laminating is adopted.
The RE-21-21 novel hot press is characterized in that the adhesive tape is pressed up and down in two directions, so that the unvulcanized adhesive tape is stuck and molded. The double-sided hot press can lead the stress of the upper adhesive tape and the lower adhesive tape to be even, improve the bonding tightness between the upper adhesive tape and the lower adhesive tape, and simultaneously lead the lap joint between the adhesive tapes of the capsule main body and the bonding interface of the inner sealing adhesive tape and the outer sealing adhesive tape to be integrated through double-sided hot press. Greatly improves the adhesive strength and the air tightness and the pressure resistance of the integral capsule.
An integrated forming process for coating an adhesion promoting layer on a rubber capsule of a transformer oil storage cabinet specifically comprises the following steps:
And 1, preparing the tackifying layer glue solution.
The film was prepared by conventional procedures for compounding agent sizes using nitrile rubber-40 as the primary size for the adhesion promoting layer: banburying, mixing, filtering and discharging; the tackifying layer sizing formula comprises the following components in parts by weight: 100 parts of butyronitrile-40 (producing area: russia), 5-9 parts of ZnO, 1-2 parts of SA, 30-35 parts of spray carbon black, 15-18 parts of dioctyl sebacate, 3-5 parts of accelerator H, 2 parts of accelerator TT, 0.2 part of sulfur and 18-20 parts of 2123 phenolic resin (added during stirring); the glue stock of the adhesion promoting layer which is qualified in mixing is returned to be refined into a glue stock of 3-5mm on an open mill, cut into small blocks of about 10cm 2, and ethyl acetate solvent is prepared, wherein the mass ratio of the glue stock to the ethyl acetate solvent is 1:2.5; firstly, putting small blocks of sizing material into a stirrer, then putting 1/3 of the total weight of ethyl acetate into the stirrer, when the swelling of the film begins to dissolve, pouring 1/4 of the 2/3 of the total weight of the rest ethyl acetate solvent into the stirrer, continuously stirring to the extent that no sizing block exists, finally pouring the rest ethyl acetate solvent into a tank, uniformly stirring, and filtering by a 100-mesh screen for later use.
And step2, coating tackifying glue solution.
And (3) adopting a horizontal scraper gumming machine to lead the dried J9211 brocade silk to be spread on a cloth end, adjusting a chamfer edge with the gap distance between a scraper and a textile fabric being 4-6mm wide, and coating a single surface for 2 times according to the process gumming amount at the temperature of 100-110 ℃ and the roller speed of 10-12 m/min.
And 3, drying.
After the coating is finished, the coating is heated and dried by a heating plate, the solution in the coating liquid is volatilized, and the coating liquid is curled by a cloth liner.
And 4, double-sided rubberizing.
Firstly, placing a curled coated fabric roller on a roller frame of a calender to prepare grey fabric, then adjusting the roller temperature, the roller spacing and the film thickness, and starting to carry out double-sided main body butyronitrile-26 sizing on the calender; operating conditions: the roller speed is 10 m/min at the roller temperature of 85-90 ℃, 75-80 ℃ and 50-55 ℃ at the roller temperature, and the speed ratio is 1:1:1; the thickness of the adhesive tape is 0.85-0.95mm on the first surface and 1.2-1.4mm on the second surface; after the double-sided rubberizing is finished, the double-sided rubberizing is curled by clean cloth, and is placed on a frame for forming capsules.
And 5, integrally forming the capsule.
(1) Setting the temperature of the RE-21-12 hot press to be between 80 and 85 ℃;
(2) Cutting: the surface of the rolled double-sided adhesive tape which is parked for 12 hours is subjected to quality inspection, the adhesive tape is not allowed to have perforation, fabric fracture, air bubble and cloth exposure phenomena, the inspection standard is implemented according to (Q/TT J32.07.18-2017), and the inspected adhesive tape is cut and prepared for molding according to the specification and model requirements of the drawing;
(3) And (3) forming: after the overlapping width of the adhesive tape of the capsule main body is 25 (+ -5) mm and the body-head overlapping is 20mm, and the overlapping area of the adhesive tape of the capsule main body and the inner sealing adhesive tape and the outer sealing adhesive tape are cleaned up by using a solvent (ethyl acetate), the central line of the adhesive part of the capsule is simultaneously adjusted to be aligned with the central lines of the upper heating plate and the lower heating plate by a novel hot press station, distortion dislocation is not allowed, no wrinkles and bubbles appear on the surface, the capsule is placed, and the hot press is started immediately; the hot pressing process conditions of the adhesive tape lap joint part of the capsule main body are 80-85 ℃ for 3 minutes, after hot pressing and combination, the upper heating plate automatically rises to remove the heating surface, and the capsule is taken out. And (3) performing appearance quality inspection on the heated part, if defects are found, repairing in time, and then transferring to the next procedure for vulcanization to prepare the final rubber capsule.
Example 1.
An integrated forming process for coating an adhesion promoting layer on rubber capsules of an oil storage cabinet of a transformer, wherein the size of the formed capsules is phi 1000 x 3000.
① The weight ratio of the tackifying layer sizing material is as follows: nitrile-40 parts, znO 9 parts, SA 2 parts, spray carbon black 30 parts, dioctyl sebacate 18 parts, accelerator H3 parts, accelerator TT 2 parts, sulfur 0.2 parts and 2123 phenolic resin 18 parts (added during stirring); conventional mixing of the sizing material according to a formula, namely, returning the sizing material with the qualified viscosity-increasing layer to a film with the thickness of 3-5mm on an open mill, cutting the film into small blocks with the thickness of about 10cm 2, and preparing ethyl acetate solvent, wherein the mass ratio of the sizing material to the ethyl acetate solvent is 1:2.5; firstly, putting small blocks of sizing material into a stirrer, then putting 1/3 of the total weight of ethyl acetate into the stirrer, when the swelling of the film begins to dissolve, pouring 1/4 of the 2/3 of the total weight of the rest ethyl acetate solvent into the stirrer, continuously stirring to the extent that no sizing block exists, finally pouring the rest ethyl acetate solvent into a tank, uniformly stirring, and filtering by a 100-mesh screen for later use.
② Coating the tackifying glue solution, adopting a horizontal scraper glue spreader, leading the dried J9211 brocade silk to be on a cloth end, adjusting the inclined edges with the gap distance between the scraper and the textile being 4-6mm wide, and coating the single surface for 2 times according to the process gluing amount at the temperature of 100-110 ℃ and the roller speed of 10-12 m/min.
③ Drying, heating and drying by a heating plate after coating, volatilizing the solution in the coating liquid, and curling by using a cloth liner.
④ The double-sided rubberizing is carried out by firstly placing the curled coated cloth roller on a roller frame of a calender, preparing grey cloth, then adjusting the roller temperature, the roller spacing and the thickness of the film, and starting to carry out double-sided rubberizing of the main body butyronitrile-26 sizing material on the calender. Operating conditions: the roller speed is 10 m/min at the roller temperature of 85-90 ℃, 75-80 ℃ and 50-55 ℃ at the roller temperature, and the speed ratio is 1:1:1; the thickness of the adhesive tape is 0.9mm on the first surface and 1.3mm on the second surface; after the double-sided rubberizing is finished, the double-sided rubberizing is curled by clean cloth, and is placed on a frame for forming capsules.
⑤ The capsule is integrally formed, the dimension cutting is carried out on phi 1000 x 3000 according to the drawing, and then the capsule is formed according to the following steps:
(1) Setting the temperature of the RE-21-12 hot press to be between 80 and 85 ℃;
(2) Cutting: the surface of the rolled double-sided adhesive tape which is parked for 12 hours is subjected to quality inspection, the adhesive tape is not allowed to have perforation, fabric fracture, air bubble and cloth exposure phenomena, the inspection standard is implemented according to (Q/TT J32.07.18-2017), and the inspected adhesive tape is cut and prepared for molding according to the specification and model requirements of the drawing;
(3) And (3) forming: the overlap width of the adhesive tape of the capsule main body is 25mm, and the overlap of the body and the head is 20mm; after the overlapping area of the adhesive tape of the capsule main body and the joint surfaces of the inner sealing adhesive tape and the outer sealing adhesive tape are cleaned up by using a solvent (ethyl acetate), the station of the novel hot press machine is used for simultaneously adjusting the central line of the adhesive part of the capsule to be aligned with the central lines of the upper heating plate and the lower heating plate, so that twisting dislocation is not allowed, no crease and bubble are generated on the surface, and the hot press machine is started immediately after the capsule is placed, wherein the station of the hot press machine is provided with an upper heating plate and a lower heating plate, and the upper heating plate and the lower heating plate are paved with a certain compression deformation and the adhesive plate with excellent ageing resistance and high temperature resistance with the thickness of 10mm; the hot pressing process conditions of the adhesive tape lap joint part of the capsule main body are 80-85 ℃ for 3 minutes, after hot pressing and combination, the upper heating plate automatically rises to remove the heating surface, and the capsule is taken out. And (3) performing appearance quality inspection on the heated part, if defects are found, repairing in time, and then transferring to the next procedure for vulcanization to prepare the final rubber capsule.
Example 2.
An integrated forming process for coating an adhesion promoting layer on rubber capsules of an oil storage cabinet of a transformer, wherein the size of the formed capsules is phi 1000 x 3000.
① The weight ratio of the tackifying layer sizing material is as follows: 100 parts of butyronitrile, 7 parts of ZnO, 1.5 parts of SA, 32 parts of spray carbon black, 16 parts of dioctyl sebacate, 4 parts of accelerator H, 2 parts of accelerator TT, 0.2 part of sulfur and 19 parts of 2123 phenolic resin (added during stirring); conventional mixing of the sizing material according to a formula, namely, returning the sizing material with the qualified viscosity-increasing layer to a film with the thickness of 3-5mm on an open mill, cutting the film into small blocks with the thickness of about 10cm 2, and preparing ethyl acetate solvent, wherein the mass ratio of the sizing material to the ethyl acetate solvent is 1:2.5; firstly, putting small blocks of sizing material into a stirrer, then putting 1/3 of the total weight of ethyl acetate into the stirrer, when the swelling of the film begins to dissolve, pouring 1/4 of the 2/3 of the total weight of the rest ethyl acetate solvent into the stirrer, continuously stirring to the extent that no sizing block exists, finally pouring the rest ethyl acetate solvent into a tank, uniformly stirring, and filtering by a 100-mesh screen for later use.
② Coating the tackifying glue solution, adopting a horizontal scraper glue spreader, leading the dried J9211 brocade silk to be on a cloth end, adjusting the inclined edges with the gap distance between the scraper and the textile being 4-6mm wide, and coating the single surface for 2 times according to the process gluing amount at the temperature of 100-110 ℃ and the roller speed of 10-12 m/min.
③ Drying, heating and drying by a heating plate after coating, volatilizing the solution in the coating liquid, and curling by using a cloth liner.
④ Firstly, placing a curled coated fabric roller on a roller frame of a calender to prepare grey fabric, then adjusting the roller temperature, the roller spacing and the film thickness, and starting to carry out double-sided main body butyronitrile-26 sizing on the calender; operating conditions: the roller speed is 10 m/min at the roller temperature of 85-90 ℃, 75-80 ℃ and 50-55 ℃ at the roller temperature, and the speed ratio is 1:1:1; the thickness of the adhesive tape is 0.9mm on the first surface and 1.3mm on the second surface; after the double-sided rubberizing is finished, the double-sided rubberizing is curled by clean cloth, and is placed on a frame for forming capsules.
⑤ The capsule is integrally formed, the dimension cutting is carried out on phi 1000 x 3000 according to the drawing, and then the capsule is formed according to the following steps:
(1) Setting the temperature of the RE-21-12 hot press to be between 80 and 85 ℃;
(2) Cutting: the surface of the rolled double-sided adhesive tape which is parked for 12 hours is subjected to quality inspection, the adhesive tape is not allowed to have perforation, fabric fracture, air bubble and cloth exposure phenomena, the inspection standard is implemented according to (Q/TT J32.07.18-2017), and the inspected adhesive tape is cut and prepared for molding according to the specification and model requirements of the drawing;
(3) And (3) forming: after the overlapping width of the adhesive tape of the capsule main body is 25mm and the overlapping width of the body-head is 20mm, the overlapping area of the adhesive tape of the capsule main body and the inner sealing adhesive tape and the outer sealing adhesive tape are cleaned up by using a solvent (ethyl acetate), the central line of the adhesive part of the capsule is simultaneously adjusted to be aligned with the central lines of the upper heating plate and the lower heating plate by a novel hot press station, distortion dislocation is not allowed, no wrinkles and bubbles appear on the surface, after the capsule is placed, the hot press is started immediately, the hot press station is provided with an upper heating plate and a lower heating plate, and the upper heating plate and the lower heating plate are paved with a certain compression deformation and an adhesive plate with excellent ageing resistance and high temperature resistance performance, and the thickness of the adhesive plate is 10mm. And (3) carrying out hot pressing on the overlapping part of the adhesive tape of the capsule main body for 3 minutes at the temperature of 80-85 ℃, automatically lifting an upper heating plate to remove a heating surface after hot pressing and combining, taking out the capsule, and carrying out appearance quality inspection on the heating part, if defects are found, carrying out repair in time, and then transferring to a next procedure for vulcanization, so as to prepare the final rubber capsule.
Example 3.
An integrated forming process for coating an adhesion promoting layer on rubber capsules of an oil storage cabinet of a transformer, wherein the size of the formed capsules is phi 1000 x 3000.
① The weight ratio of the tackifying layer sizing material is as follows: nitrile-40 parts, znO 5 parts, SA 1 parts, spray carbon black 34 parts, dioctyl sebacate 15 parts, accelerator H5 parts, accelerator TT 2 parts, sulfur 0.2 parts and 2123 phenolic resin 20 parts (added during stirring); conventional mixing of the sizing material according to a formula, namely, returning the sizing material with the qualified viscosity-increasing layer to a film with the thickness of 3-5mm on an open mill, cutting the film into small blocks with the thickness of about 10cm 2, and preparing ethyl acetate solvent, wherein the mass ratio of the sizing material to the ethyl acetate solvent is 1:2.5; firstly, putting small blocks of sizing material into a stirrer, then putting 1/3 of the total weight of ethyl acetate into the stirrer, when the swelling of the film begins to dissolve, pouring 1/4 of the 2/3 of the total weight of the rest ethyl acetate solvent into the stirrer, continuously stirring to the extent that no sizing block exists, finally pouring the rest ethyl acetate solvent into a tank, uniformly stirring, and filtering by a 100-mesh screen for later use.
② Coating the tackifying glue solution, adopting a horizontal scraper glue spreader, leading the dried J9211 brocade silk to be on a cloth end, adjusting the inclined edges with the gap distance between the scraper and the textile being 4-6mm wide, and coating the single surface for 2 times according to the process gluing amount at the temperature of 100-110 ℃ and the roller speed of 10-12 m/min.
③ Drying, heating and drying by a heating plate after coating, volatilizing the solution in the coating liquid, and curling by using a cloth liner.
④ The double-sided rubberizing is carried out by firstly placing the curled coated cloth roller on a roller frame of a calender, preparing grey cloth, then adjusting the roller temperature, the roller spacing and the thickness of the film, and starting to carry out double-sided rubberizing of the main body butyronitrile-26 sizing material on the calender. Operating conditions: the roller speed is 10 m/min at the roller temperature of 85-90 ℃, 75-80 ℃ and 50-55 ℃ at the roller temperature, and the speed ratio is 1:1:1; the thickness of the adhesive tape is 0.9mm on the first surface and 1.3mm on the second surface; after the double-sided rubberizing is finished, the double-sided rubberizing is curled by clean cloth, and is placed on a frame for forming capsules.
⑤ The capsule is integrally formed, the dimension cutting is carried out on phi 1000 x 3000 according to the drawing, and then the capsule is formed according to the following steps:
(1) Setting the temperature of the RE-21-12 hot press to be between 80 and 85 ℃;
(2) Cutting: the surface of the rolled double-sided adhesive tape which is parked for 12 hours is subjected to quality inspection, the adhesive tape is not allowed to have perforation, fabric fracture, air bubble and cloth exposure phenomena, the inspection standard is implemented according to (Q/TT J32.07.18-2017), and the inspected adhesive tape is cut and prepared for molding according to the specification and model requirements of the drawing;
(3) And (3) forming: the overlap width of the adhesive tape of the capsule main body is 25mm, and the overlap of the body and the head is 20mm; after the overlapping area of the adhesive tape of the capsule main body and the joint surfaces of the inner sealing adhesive tape and the outer sealing adhesive tape are cleaned up by using a solvent (ethyl acetate), the station of the novel hot press machine is used for simultaneously adjusting the central line of the adhesive part of the capsule to be aligned with the central lines of the upper heating plate and the lower heating plate, so that twisting dislocation is not allowed, no crease and bubble are generated on the surface, and the hot press machine is started immediately after the capsule is placed, wherein the station of the hot press machine is provided with an upper heating plate and a lower heating plate, and the upper heating plate and the lower heating plate are paved with a certain compression deformation and the adhesive plate with excellent ageing resistance and high temperature resistance with the thickness of 10mm; the hot-pressing process condition of the overlap joint part of the adhesive tape of the capsule main body is 80-85 ℃ for 3 minutes, after hot-pressing combination, the upper heating plate automatically rises to remove the heating surface, and the capsule is taken out; and (3) performing appearance quality inspection on the heated part, if defects are found, repairing in time, and then transferring to the next procedure for vulcanization to prepare the final rubber capsule.
The technical effects achieved by the technical solutions of examples 1-3 are as follows:
table 3 the examples are compared with the results of conventional capsule performance tests.
Claims (2)
1. An integrated forming process for coating an adhesion promoting layer on a rubber capsule of a transformer oil storage cabinet specifically comprises the following steps:
Step1, preparation of tackifying layer glue solution
Using nitrile rubber-40 as a main sizing material of the tackifying layer, preparing a film by a conventional procedure of compounding agent sizing material according to the formula of the sizing material of the tackifying layer, wherein the conventional procedure is banburying, mixing, filtering and discharging; returning the qualified tackified layer sizing material to a roll mill to obtain a 3-5mm film, cutting the film into small blocks of about 10cm 2, and preparing an ethyl acetate solvent; firstly, putting small blocks of sizing material into a stirrer, then putting 1/3 of the total weight of ethyl acetate into the stirrer, when the swelling of a film begins to dissolve, pouring 1/4 of the 2/3 of the total weight of the rest ethyl acetate solvent into the stirrer, continuously stirring to the extent that no sizing block exists, finally pouring the rest ethyl acetate solvent into a tank, uniformly stirring, and filtering by a 100-mesh screen for later use;
step 1.1, 2123 phenolic resin and accelerator H proportioning amount selection method
2123 Phenolic resin is thermoplastic resin formed by polycondensing phenol and formaldehyde in an acidic medium, accelerator H is selected as a curing agent, and a variable ratio experiment is carried out to determine that the mixing amount of the accelerator H is 3-5 parts by mass;
the tackifying layer sizing formula comprises the following components in parts by weight: 100 parts of nitrile rubber, 5-9 parts of ZnO, 1-2 parts of SA, 30-35 parts of spray carbon black, 15-18 parts of dioctyl sebacate, 3-5 parts of accelerator H, 2 parts of accelerator TT, 0.2 part of sulfur and 18-20 parts of 2123 phenolic resin during stirring;
The mass ratio of the sizing material to the ethyl acetate solvent is 1:2.5;
Step 1.2, selection method of framework layer material
The molecular structure of the fabric fiber needs to contain polar groups, can form good adhesion with the main body butyronitrile-26 sizing material, and performs experimental comparison on the fabric;
polyimide, 525 brocade silk, J9211 brocade silk and polyester glue layer silk are adopted respectively, and the J9211 brocade silk is determined to be used as a capsule skeleton layer material after experimental comparison;
Step2, coating an adhesion promoting layer glue solution
Adopting a horizontal scraper gumming machine to lead the dried J9211 brocade silk to be cloth-connected, and coating a single side for 2 times according to the process gumming amount;
The technological parameters of the horizontal scraper gumming machine in the step 2 are that the gap distance between the inclined edges of the scraper and the textile fabric is 4-6mm wide, the temperature is 100-110 ℃, and the roller speed is 10-12 m/min;
Step 3, drying
Heating and drying the coating liquid by a heating plate after the coating is finished, volatilizing the solution in the coating liquid, and curling by using a cloth liner;
Step 4, double-sided rubberizing
Firstly, placing a curled coated fabric roll on a roll frame of a calender to prepare grey fabric, then adjusting the roll temperature, the roll spacing and the film thickness, starting to carry out double-sided adhesive bonding of a main body butyronitrile-26 rubber material on the calender, curling with clean cloth after double-sided adhesive bonding, and placing on the frame to prepare a formed capsule;
The operation condition of the calender is that the roller temperature is 85-90 ℃, the medium temperature is 75-80 ℃, the roller speed is 50-55 ℃, and the speed ratio is 1:1:1; the thickness of the main body butyronitrile-26 sizing material is 0.85-0.95mm on the first surface and 1.2-1.4mm on the second surface;
step 5, capsule integrated forming
(1) Setting the temperature of the RE-21-12 hot press to be between 80 and 85 ℃;
(2) Cutting: the surface of the rolled double-sided adhesive tape which is parked for 12 hours is subjected to quality inspection, the adhesive tape is not allowed to have perforation, fabric fracture, air bubble and cloth exposure phenomena, the inspection standard is implemented according to Q/TT J32.07.18-2017, and the inspected adhesive tape is cut and prepared for molding according to the specification and model requirements of the drawing;
(3) And (3) forming: after the overlapping width of the adhesive tape of the capsule main body is 25+/-5 mm and the body-head overlapping is 20mm, cleaning the overlapping area of the adhesive tape of the capsule main body and the inner sealing adhesive tape and the outer sealing adhesive tape by using ethyl acetate solvent, simultaneously adjusting the central line of the adhesive part of the capsule to be aligned with the central lines of the upper heating plate and the lower heating plate, not allowing distortion and dislocation, preventing wrinkles and bubbles from occurring on the surface, immediately starting the hot press after the capsule is placed, wherein the station of the hot press is provided with an upper heating plate and a lower heating plate, paving a rubber plate with a thickness of 10mm on the upper heating plate and the lower heating plate, having certain compression deformation and excellent ageing resistance and high temperature resistance, and the hot press process condition of the overlapping part of the adhesive tape of the capsule main body is that the temperature is 80-85 ℃ for 3 minutes, and after hot press combination, the upper heating plate is automatically lifted to remove the heating surface, and the capsule is taken out; and (3) performing appearance quality inspection on the heated part, if defects are found, repairing in time, and then transferring to the next procedure for vulcanization to prepare the final product rubber capsule.
2. A capsule structure formed integrally based on a coating adhesion-promoting layer by adopting the process as claimed in claim 1, which is characterized by comprising a J9211 brocade silk layer, an adhesion-promoting layer and a capsule main body butyronitrile-26 glue layer;
The nitrile-26 glue layer of the capsule main body is respectively pressed with the two sides of the J9211 brocade silk layer through the glue layer of the tackifying layer;
The thickness of the capsule structure is 1.2-1.4mm, and the thickness of the J9211 brocade silk layer is 0.51mm.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4338370A (en) * | 1980-04-07 | 1982-07-06 | Goodyear Aerospace Corporation | Chemically resistant coated fabric |
| CN102486011A (en) * | 2010-12-03 | 2012-06-06 | 沈阳洪达橡塑总厂 | Low temperature rubber capsule used in oil conservator for transformer and preparation process |
| CN103158271A (en) * | 2011-12-14 | 2013-06-19 | 常熟市新华化工有限公司 | Production method of transformer oil storage capsule |
-
2022
- 2022-07-18 CN CN202210839928.3A patent/CN115157519B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4338370A (en) * | 1980-04-07 | 1982-07-06 | Goodyear Aerospace Corporation | Chemically resistant coated fabric |
| CN102486011A (en) * | 2010-12-03 | 2012-06-06 | 沈阳洪达橡塑总厂 | Low temperature rubber capsule used in oil conservator for transformer and preparation process |
| CN103158271A (en) * | 2011-12-14 | 2013-06-19 | 常熟市新华化工有限公司 | Production method of transformer oil storage capsule |
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