CN204253855U - A kind of gasket seal being applied to low temperature environment - Google Patents
A kind of gasket seal being applied to low temperature environment Download PDFInfo
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- CN204253855U CN204253855U CN201420695201.3U CN201420695201U CN204253855U CN 204253855 U CN204253855 U CN 204253855U CN 201420695201 U CN201420695201 U CN 201420695201U CN 204253855 U CN204253855 U CN 204253855U
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Abstract
The utility model provides a kind of gasket seal being applied to low temperature environment, described gasket seal is multi-layer compound structure, described multi-layer compound structure comprises caoutchouc layer, the front and back of described caoutchouc layer is outwards respectively equipped with expansion buffer layer, flame-retardant layer, corrosion-resistant coating, cold-resistant layer successively from inner, is provided with polytetrafluoroethylene floor outside described cold-resistant layer.Gasket seal of the present utility model, the multi-layer compound structure be provided with, substantially increase the expansibility of product, flame retarding, oil resistance, anticorrosive property, the cold-resistant performance such as frost resistance, mechanical strength, make the summation excellent performance of product, be applicable to the chiller plant of biochemistry.
Description
Technical field
The utility model relates to a kind of gasket seal being applied to low temperature environment.
Background technique
Gasket seal is a kind of for inside such as machinery, equipment, pipelines, the material sealed.
Gasket seal is very important on biochemical equipment.In the production process of biochemical equipment, often there is equipment failure, produce the accident generations such as interruption, inventory disposal, trace it to its cause and be no lack of seal element (comprising gasket seal) damage initiation sealing technique Failure Factors.Seal element (comprising gasket seal) performs except process parameter except guarantee is accurate in a set of biochemical equipment; its another function is exactly avoid three of electromechanical equipment to leak (water, gas, wet goods); it to ensure equipment safe and highly efficient operation, save energy and protect environment, ensure produce quality of product have very important effect, the investigation and application to it is all paid much attention in countries in the world.
Chiller plant is an important branch in biochemical equipment, and gasket seal in chiller plant application also widely.The gasket seal used in current chiller plant is nonmetal gasket seal, and nonmetal gasket seal mainly comprises asbestos rubber Composition spacer, rubber and Reinforced by Metal Composition spacer and the rubber combined pad of non-asbestos fiber.Containing asbestos gasket seal be current Applicable scope comparatively extensively, a class pad of excellent performance, due in asbestos fiber containing carcinogen, each major industrialized country of the world all eliminates and prohibits the use asbestos product.In addition external related standards and legal provisions, if desired the occasion of asbestos product is used to put up warning mark, this sealing article contains asbestos, this type of process containing asbestos product waste simultaneously also must be undertaken by the requirement of regulation, working condition in chiller plant is not very harsh, can not use the gasket seal containing asbestos completely.Rubber and Reinforced by Metal Composition spacer mainly by corrosion resistant plate or aluminium sheet as central layer, on the two sides of sheet metal, each compound one deck rubber aft-loaded airfoil forms.But rubber is easily aging, after sealing surface uses the long period, the easy adhesion sealing surface of rubber, make will clear up sealing surface when changing gasket seal, easily cause the damage of machine, the installation of this pad and use are all inconvenient, and the mechanical and physical performance analysis of this gasket seal, also do not have obvious feature, performance is bad.
Due to asbestos rubber Composition spacer, rubber and Reinforced by Metal Composition spacer, all there is many defects, therefore, we should develop some non-asbestos fiber rubber composite gland bush sheets more.
For being applied to the gasket seal of low temperature environment in biochemical equipment, the place of applying due to equipment, environment are comparatively special, therefore, also comparatively strict to the requirement of gasket seal.
Current biochemical equipment great majority are used for the fields such as biochemical industry pharmacy, sewage treatment, oilfield exploitation.For these fields, gasket seal is except requiring its sealing, for production safety, still higher to its performance requirement such as corrosion resistance, flame retarding.
Again due to the requirement of chiller plant, therefore, required by having the winter hardiness of gasket seal.
Therefore, in order to socioeconomic development, be necessary to develop a kind of gasket seal being applied to low temperature environment.
Model utility content
Model utility object: the purpose of this utility model is to solve the deficiencies in the prior art, provides a kind of gasket seal being applied to low temperature environment.
Technological scheme: in order to realize above object, the utility model provides a kind of gasket seal being applied to low temperature environment, described gasket seal is multi-layer compound structure, described multi-layer compound structure comprises caoutchouc layer, the front and back of described caoutchouc layer is outwards respectively equipped with expansion buffer layer, flame-retardant layer, corrosion-resistant coating, cold-resistant layer successively from inner, is provided with polytetrafluoroethylene floor outside described cold-resistant layer; Described flame-retardant layer is EVA resin layer, and described flame-retardant layer is made up of the material of following mass percent:
EVA resin: 100 parts; EVA resin has the elasticity as good ductility and rubber, under the low temperature of-50 DEG C, still can keep good pliability, winter hardiness is better, and its transparency, surface gloss and chemical stability are good, and good with the miscibility of filler, therefore can be used for cryogenic refrigeration equipment;
Ethylene propylene diene rubber EPDM:8-10 part; Ethylene propylene diene rubber has the advantages such as superior electrical insulating property, elasticity, ageing resistance, corrosion resistance, wear resistance, oil resistance, and environmental protection, after adding ethylene propylene diene rubber, the mechanical property of Total Product can be strengthened significantly, and general serviceability temperature is-50 ~ 150 DEG C, and winter hardiness is better;
Butadiene rubber after sulfuration: 10-15 part; Be called for short BR, obtained by polymerizing butadiene.With other general purpose rubber ratios, the winter hardiness of the butadiene rubber after sulfuration, wear resistance and elasticity are excellent especially, with EVA and ethylene propylene diene rubber EPDM compound use, making product also having winter hardiness well while guarantee elasticity, flame retarding, wear resistance, being applicable to chiller plant;
Expanded graphite: 1-3 part; With nickel oxide compound use, can strengthen product flame retarding, mechanical property;
Nickel oxide: 4-5 part; With expanded graphite compound use;
Hydrotalcite: 1-3 part; A flame retarding material for the high-quality of environment protection type, can strengthen the flame retarding of product;
Magnesium hydroxide: 10-15 part; The inorganic combustion inhibitor of environment protection type, obviously can strengthen the flame retarding of product, also have the effect of antismoke agent simultaneously;
Polypropylene fiber: 4-6 part; Impact resistance and the toughness of product can be improved;
Paraffin: 3-4 part; Play the effect of oiling agent, simultaneously or a kind of tenderer, can viscosity be reduced, be convenient to materials processing and produce, so not only can put forward the manufacturing efficiency of materials processing, reduce cost of production, also make the chemical-resistant resistance ability of material more excellent simultaneously;
Anti-impact modifier: 3-5 part;
Plasticizing agent: 8-10 part;
Stabilizer: 2-3 part;
Coupling agent: 0.3-0.6 part;
Calcium carbonate: 5-8 part; There is flame retardant effect, improve the flame retarding of product; The effect of curing agent can also be played, curing reaction speed can be promoted, reduce the effect in reaction time; Calcium carbonate itself is as a kind of mineral filler simultaneously, can also play and improve the wear resistance of product and the effect of mechanical strength, and it is cheap, nontoxic;
Ethylene glycol: 15-20 part.Be not only solvent, simultaneously or fabulous antifreeze, the frost resistance of product can be strengthened;
Described corrosion-resistant coating is polyphenylene sulfide ether layer, and described corrosion-resistant coating is made up of the material of following mass percent:
Polyphenylene sulfide: 100 parts; Polyphenylene sulfide (PPS) is a kind of special engineering plastics of excellent combination property, has excellent high temperature resistant, corrosion-resistant, radiation hardness, fire-retardant, balanced physical and mechanical properties and the feature such as fabulous dimensional stability and excellent electrical property;
FEP:20-25 part; PEP: fluorinated ethylene propylene copolymer, be tetrafluoroethylene and hexafluoropropene copolymerization, there are splendid insulating properties, chemical-resistant stability etc., belong to the one of fluororesin, after introduce PEP in PPS, toughness and the corrosion resistance of product can well be improved;
Montmorilionite: 2-4 part; Montmorilionite has special lamellar structure, and due to its cation exchange properties, form nanometer hybrid structure under suitable condition, greatly can improve mechanical property and the barrier property of material, and join impact resistance, pliability, bin stability and the corrosion resistance that product in PPS, can be improved well;
Glass fibre: 3-5 part; Glass fibre is a kind of Inorganic Non-metallic Materials of excellent performance, of a great variety, and advantage is good insulating, heat resistance is strong, corrosion resistance good, and mechanical strength is high, after adding, can improve the corrosion resistance of product;
Paraffin: 1-2 part;
Methyl methacrylate: 4-5 part; The one of acrylate, has corrosion resistance well;
Silicon powder: 5-6 part; Silicon powder is by natural quartz (SiO2) or fused quartz (natural quartz is through high-temperature fusion, the cooled amorphous sio2) micro mist through the multiple tracks processes such as broken, ball milling (or vibration, airflow milling), flotation, pickling purification, high purity water process; Silicon powder is a kind of nontoxic, tasteless, free of contamination Inorganic Non-metallic Materials; The excellent performance such as it possesses that temperature tolerance is good, acid-alkali-corrosive-resisting, poor thermal conductivity, high insulation, low bulk, stable chemical performance, hardness are large, joins in product, can improve the combination property of product greatly; Add the winter hardiness that can also improve product to a certain extent simultaneously;
Coupling agent: 0.5-0.8 part;
Plasticizing agent: 6-8 part;
Stabilizer: 2-3 part;
Ethylene glycol: 15-20 part.Be not only solvent, simultaneously or fabulous antifreeze, the frost resistance of product can be strengthened.
Described expansion buffer layer is PE/SBS composite bed, and the thickness of described expansion buffer layer (2) is 0.2-0.4mm.SBS, SBS, has splendid expansibility; SBS can contact with water, weak acid, alkali etc. simultaneously, has excellent tensile strength, and surface friction coefficient is large, the characteristics such as cryogenic property is good, good processability; PE, polyethylene, odorless, nontoxic, chemical stability is good, the erosion of the most of soda acid of ability, especially has excellent resistance to low temperature (minimum serviceability temperature can reach-100 ~-70 ° of C); Blended cryogenic property and the impact strength obviously can improving goods of PE and SBS; Therefore, PE/SBS composite bed is not only that product has the expansibility change of adaptive temperature (can), or product has lower temperature resistance (winter hardiness, frost resistance) well, is applicable to chiller plant.
The thickness of described flame-retardant layer is 0.2-0.3mm.
The thickness of described corrosion-resistant coating is 0.3-0.4mm.
Described cold-resistant layer is carbon fiber layer, and the thickness of described cold-resistant layer is 0.6-0.8mm.Carbon fiber has fabulous freeze proof winter hardiness, and otherwise performance is also very excellent simultaneously, is applicable to the sealing material of chiller plant, but, because its price comparison is expensive, therefore, only compound one deck carbon fiber layer on sealing gasket.
The thickness of described polytetrafluoroethylene floor is 0.3-0.5mm.Teflon has a series of excellent usability: high temperature resistant-Long-Time Service temperature 200 ~ 260 degree, low temperature resistant-still soft when-100 spend; Corrosion-resistant-ability chloroazotic acid and all organic solvents; Aging life-span best in weatherability-plastics; Height lubricates-has friction factor (0.04) minimum in plastics; Not viscosity-there is surface tension minimum in solid material and do not adhere to any material; Nonhazardous-there is physiological inertia; Therefore, as the outermost surface of gasket seal, not only there is waterproof anti-corrosion effect, also serve cold-resistant low temperature resistant effect simultaneously.
Described anti-impact modifier is metacrylate-butadiene one styrol copolymer; Metacrylate-butadiene one styrol copolymer and MBS are a kind of novel high polymer materials, adopt emulsion grafting polymerization method to be prepared from by methyl methacrylate (M), butadiene (B) and vinyl benzene (S); This resin has typical nucleocapsid structure on submicro-morphological, the rubber phase globose nucleus of core to be a diameter be 10 ~ 100 nm, and outside is the shell of vinyl benzene and methyl methacrylate composition; This special construction of MBS imparts the shock resistance of goods excellence; When adding MBS resin in this product, the impact strength of product can be made to improve 4-15 doubly, also can improve winter hardiness and the processing fluidity of product simultaneously;
Described plasticizing agent is dioctyl sebacate; The plasticizing effect of product is strengthened, also makes its pliability strengthen, be more prone to processing, simultaneously less expensive, and nontoxic;
Described stabilizer is calcium-zinc composite stabilizing agent and pentaerythritol composition by weight ratio is the mixture of 1:2; Adding stabilizer can make product property more stable, prevent its decompose, aging, calcium-zinc composite stabilizing agent is compared to stabilizers such as some other metallic lead classes simultaneously, not only stablizing effect is good, also nontoxic, environmental protection simultaneously, after pentaerythritol mixing, its stablizing effect can be further enhanced;
Described coupling agent is vinyl three tert-butyl peroxide silane; Add the performance such as heat resistance, flame retarding, solvent resistance, mechanical strength that this coupling agent can significantly improve product.
Beneficial effect: what the utility model provided is applied to the gasket seal of low temperature environment compared with prior art, has the following advantages:
1, gasket seal of the present utility model, the multi-layer compound structure be provided with, substantially increase the expansibility of product, flame retarding, oil resistance, anticorrosive property, the cold-resistant performance such as frost resistance, mechanical strength, make the summation excellent performance of product, be applicable to the chiller plant of biochemistry;
2, gasket seal of the present utility model, adopts natural rubber as the basic unit of product, takes full advantage of the cold tolerance of natural rubber itself, makes the cold tolerance of product own just comparatively superior;
3, gasket seal of the present utility model, the material of each layer practicality is all environment protection type material, makes the own safety of product, environmental protection, nontoxic;
4, gasket seal of the present utility model, flame-retardant layer and corrosion-resistant coating, have employed new compound proportioning, and its flame retarding of the equivalent layer be prepared into and anticorrosive property better effects if make the performance of product self comparatively go together better.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment;
In figure: 1-caoutchouc layer, 2-expansion buffer layer, 3-flame-retardant layer, 4-corrosion-resistant coating, 5-resist cold layer, 6-polytetrafluoroethylene floor.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail; but illustrate that protection domain of the present utility model is not limited to the concrete scope of the present embodiment simultaneously; based on the embodiment in the utility model; those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
embodiment 1
As shown in Figure 1: a kind of gasket seal being applied to low temperature environment, described gasket seal is multi-layer compound structure, described multi-layer compound structure comprises caoutchouc layer 1, the front and back of described caoutchouc layer 1 is outwards respectively equipped with expansion buffer layer 2, flame-retardant layer 3, corrosion-resistant coating 4, cold-resistant layer 5 successively from inner, is provided with polytetrafluoroethylene floor 6 outside described cold-resistant layer 5.
Described expansion buffer layer 2 is PE/SBS composite bed, and the thickness of described expansion buffer layer 2 is 0.2mm;
Described flame-retardant layer 3 is EVA resin layer, and the thickness of described flame-retardant layer 3 is 0.2mm;
Described corrosion-resistant coating 4 is polyphenylene sulfide ether layer, and the thickness of described corrosion-resistant coating 4 is 0.3mm;
Described cold-resistant layer 5 is carbon fiber layer, and the thickness of described cold-resistant layer 5 is 0.6mm;
The thickness of described polytetrafluoroethylene floor 6 is 0.3mm.
In the present embodiment, described flame-retardant layer 3 is made up of the material of following mass percent:
EVA resin: 100 parts;
Ethylene propylene diene rubber EPDM:8 part;
Butadiene rubber after sulfuration: 10 parts;
Expanded graphite: 1 part;
Nickel oxide: 4 parts;
Hydrotalcite: 1 part;
Magnesium hydroxide: 10 parts;
Polypropylene fiber: 4 parts;
Paraffin: 3 parts;
Anti-impact modifier: metacrylate-butadiene one styrol copolymer: 3 parts;
Plasticizing agent: dioctyl sebacate: 8 parts;
Stabilizer: calcium-zinc composite stabilizing agent and pentaerythritol composition by weight ratio are the mixture of 1:2: 2 parts;
Coupling agent: vinyl three tert-butyl peroxide silane: 0.3 part;
Calcium carbonate: 5 parts;
Ethylene glycol: 15 parts;
Described corrosion-resistant coating 4 is made up of the material of following mass percent:
Polyphenylene sulfide: 100 parts;
FEP:20 part;
Montmorilionite: 2 parts;
Glass fibre: 3 parts;
Paraffin: 1 part;
Methyl methacrylate: 4 parts;
Silicon powder: 5 parts;
Coupling agent: vinyl three tert-butyl peroxide silane: 0.5 part;
Plasticizing agent: dioctyl sebacate: 6 parts;
Stabilizer: calcium-zinc composite stabilizing agent and pentaerythritol composition by weight ratio are the mixture of 1:2: 2 parts;
Ethylene glycol: 15 parts.
embodiment 2
As shown in Figure 1: a kind of gasket seal being applied to low temperature environment, described gasket seal is multi-layer compound structure, described multi-layer compound structure comprises caoutchouc layer 1, the front and back of described caoutchouc layer 1 is outwards respectively equipped with expansion buffer layer 2, flame-retardant layer 3, corrosion-resistant coating 4, cold-resistant layer 5 successively from inner, is provided with polytetrafluoroethylene floor 6 outside described cold-resistant layer 5.
Described expansion buffer layer 2 is PE/SBS composite bed, and the thickness of described expansion buffer layer 2 is 0.3mm;
Described flame-retardant layer 3 is EVA resin layer, and the thickness of described flame-retardant layer 3 is 0.25mm;
Described corrosion-resistant coating 4 is polyphenylene sulfide ether layer, and the thickness of described corrosion-resistant coating 4 is 0.35mm;
Described cold-resistant layer 5 is carbon fiber layer, and the thickness of described cold-resistant layer 5 is 0.7mm;
The thickness of described polytetrafluoroethylene floor 6 is 0.4mm.
In the present embodiment, described flame-retardant layer 3 is made up of the material of following mass percent:
EVA resin: 100 parts;
Ethylene propylene diene rubber EPDM:9 part;
Butadiene rubber after sulfuration: 12.5 parts;
Expanded graphite: 2 parts;
Nickel oxide: 4.5 parts;
Hydrotalcite: 2 parts;
Magnesium hydroxide: 12.5 parts;
Polypropylene fiber: 5 parts;
Paraffin: 3.5 parts;
Anti-impact modifier: metacrylate-butadiene one styrol copolymer: 4 parts;
Plasticizing agent: dioctyl sebacate: 9 parts;
Stabilizer: calcium-zinc composite stabilizing agent and pentaerythritol composition by weight ratio are the mixture of 1:2: 2.5 parts;
Coupling agent: vinyl three tert-butyl peroxide silane: 0.45 part;
Calcium carbonate: 6.5 parts;
Ethylene glycol: 17.5 parts;
Described corrosion-resistant coating 4 is made up of the material of following mass percent:
Polyphenylene sulfide: 100 parts;
FEP:22.5 part;
Montmorilionite: 3 parts;
Glass fibre: 4 parts;
Paraffin: 1.5 parts;
Methyl methacrylate: 4.5 parts;
Silicon powder: 5.5 parts;
Coupling agent: vinyl three tert-butyl peroxide silane: 0.65 part;
Plasticizing agent: dioctyl sebacate: 7 parts;
Stabilizer: calcium-zinc composite stabilizing agent and pentaerythritol composition by weight ratio are the mixture of 1:2: 2.5 parts;
Ethylene glycol: 17.5 parts.
embodiment 3
As shown in Figure 1: a kind of gasket seal being applied to low temperature environment, described gasket seal is multi-layer compound structure, described multi-layer compound structure comprises caoutchouc layer 1, the front and back of described caoutchouc layer 1 is outwards respectively equipped with expansion buffer layer 2, flame-retardant layer 3, corrosion-resistant coating 4, cold-resistant layer 5 successively from inner, is provided with polytetrafluoroethylene floor 6 outside described cold-resistant layer 5.
Described expansion buffer layer 2 is PE/SBS composite bed, and the thickness of described expansion buffer layer 2 is 0.4mm;
Described flame-retardant layer 3 is EVA resin layer, and the thickness of described flame-retardant layer 3 is 0.3mm;
Described corrosion-resistant coating 4 is polyphenylene sulfide ether layer, and the thickness of described corrosion-resistant coating 4 is 0.4mm;
Described cold-resistant layer 5 is carbon fiber layer, and the thickness of described cold-resistant layer 5 is 0.8mm;
The thickness of described polytetrafluoroethylene floor 6 is 0.5mm.
In the present embodiment, described flame-retardant layer 3 is made up of the material of following mass percent:
EVA resin: 100 parts;
Ethylene propylene diene rubber EPDM:10 part;
Butadiene rubber after sulfuration: 15 parts;
Expanded graphite: 3 parts;
Nickel oxide: 5 parts;
Hydrotalcite: 3 parts;
Magnesium hydroxide: 15 parts;
Polypropylene fiber: 6 parts;
Paraffin: 4 parts;
Anti-impact modifier: metacrylate-butadiene one styrol copolymer: 5 parts;
Plasticizing agent: dioctyl sebacate: 10 parts;
Stabilizer: calcium-zinc composite stabilizing agent and pentaerythritol composition by weight ratio are the mixture of 1:2: 3 parts;
Coupling agent: vinyl three tert-butyl peroxide silane: 0.6 part;
Calcium carbonate: 8 parts;
Ethylene glycol: 20 parts;
Described corrosion-resistant coating 4 is made up of the material of following mass percent:
Polyphenylene sulfide: 100 parts;
FEP:25 part;
Montmorilionite: 4 parts;
Glass fibre: 5 parts;
Paraffin: 2 parts;
Methyl methacrylate: 5 parts;
Silicon powder: 6 parts;
Coupling agent: vinyl three tert-butyl peroxide silane: 0.8 part;
Plasticizing agent: dioctyl sebacate: 8 parts;
Stabilizer: calcium-zinc composite stabilizing agent and pentaerythritol composition by weight ratio are the mixture of 1:2: 3 parts;
Ethylene glycol: 20 parts.
The gasket seal of above-described embodiment, the material of each composite bed is prepared respectively, and then carries out compound, and the product obtained after compound according to the use of reality, Production requirement, can be reprocessed, and is processed into specific shape.The gasket seal prepared is multi-layer compound structure, compared to the gasket seal that structure is in the past comparatively single, its combination property improves greatly, be more applicable for some production environments comparatively complicated, in the environment higher to product requirement, be especially applicable in biochemical equipment.
The gasket seal of above-described embodiment, the material that every one deck uses all has certain cold-resistant frost resistance, and the carbon fiber be provided with especially separately resists cold layer, and adding the winter hardiness of product especially greatly, is that product is applicable to chiller plant.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its objective is to allow and is familiar with these those skilled in the art and can understands content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalents done by the utility model Spirit Essence or modification, all should be encompassed within protection domain of the present utility model.
Claims (6)
1. one kind is applied to the gasket seal of low temperature environment, it is characterized in that: described gasket seal is multi-layer compound structure, described multi-layer compound structure comprises caoutchouc layer (1), the front and back of described caoutchouc layer (1) is outwards respectively equipped with expansion buffer layer (2), flame-retardant layer (3), corrosion-resistant coating (4), cold-resistant layer (5) successively from inner, and described cold-resistant layer (5) outside is provided with polytetrafluoroethylene floor (6); Described flame-retardant layer (3) is EVA resin layer, and described corrosion-resistant coating (4) is polyphenylene sulfide ether layer.
2. the gasket seal being applied to low temperature environment according to claim 1, is characterized in that: described expansion buffer layer (2) is PE/SBS composite bed, and the thickness of described expansion buffer layer (2) is 0.2-0.4mm.
3. the gasket seal being applied to low temperature environment according to claim 1, is characterized in that: the thickness of described flame-retardant layer (3) is 0.2-0.3mm.
4. the gasket seal being applied to low temperature environment according to claim 1, is characterized in that: the thickness of described corrosion-resistant coating (4) is 0.3-0.4mm.
5. the gasket seal being applied to low temperature environment according to claim 1, is characterized in that: described cold-resistant layer (5) is carbon fiber layer, and the thickness of described cold-resistant layer (5) is 0.6-0.8mm.
6. the gasket seal being applied to low temperature environment according to claim 1, is characterized in that: the thickness of described polytetrafluoroethylene floor (6) is 0.3-0.5mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420695201.3U CN204253855U (en) | 2014-11-19 | 2014-11-19 | A kind of gasket seal being applied to low temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420695201.3U CN204253855U (en) | 2014-11-19 | 2014-11-19 | A kind of gasket seal being applied to low temperature environment |
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| CN204253855U true CN204253855U (en) | 2015-04-08 |
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| CN201420695201.3U Expired - Fee Related CN204253855U (en) | 2014-11-19 | 2014-11-19 | A kind of gasket seal being applied to low temperature environment |
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