CN1128175C - Sealing elastomer material reinforced by non-asbestos fibres and technology for compressing it into plates - Google Patents
Sealing elastomer material reinforced by non-asbestos fibres and technology for compressing it into plates Download PDFInfo
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- CN1128175C CN1128175C CN 00111702 CN00111702A CN1128175C CN 1128175 C CN1128175 C CN 1128175C CN 00111702 CN00111702 CN 00111702 CN 00111702 A CN00111702 A CN 00111702A CN 1128175 C CN1128175 C CN 1128175C
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Abstract
The present invention discloses an elastomeric seal material reinforced by non-asbestos fibres and a process for compressing the material into sheet materials. The material comprises components of agglomerant, reinforcement fibres, inorganic filling materials, curing ingredients, antioxidants, plasticiser, vulcanization accelerators, activator, colourants, etc. The process comprises preparation procedures of agglomerant refining, reinforcement fibre preprocessing, material mixing, molding, vulcanizing, etc. The material of the present invention has the advantages of good tensile strength, appropriate compression rate, good compression-resilience property and creep-relaxation resistance capacity, good heat resistance property, good medium resistance property, etc., and can be used for replacing traditional asbestos rubber seal materials in wide application range.
Description
The present invention relates to a kind of rubber-based sealing material and preparation technology thereof, the preparation technology of particularly a kind of non-asbestos fiber enhanced rubber packing material and compressed moulding thereof.
As everyone knows, sealing to national economy all departments energy-saving and cost-reducing, reduce environmental pollution etc. and play crucial effects.In the last hundred years, paronite sealing sealing material with its range of application, excellent comprehensive performance and cheap price widely, is used widely in engineering practice, and has been formed bigger industry size and wide application market always.But along with developing rapidly of modern industry production, particularly twentieth century 70 was carried since generation, and to the pollution of environment and the serious harm of HUMAN HEALTH, advanced industrial country is in succession to asbestos with contain asbestos products and forbidden or limit use for asbestos.The eighties rises, the U.S. (1986), Denmark (1986), Australia (nineteen ninety), Norway (1991), Italy (1992), Sweden (1992), Britain (1992), Germany (1993), Switzerland (1994), France's priorities such as (1996) have been worked out and have been forbidden or limit production and use asbestos and the decree that contains asbestos products, comprise traditional asbestos seal material.In view of to the production that contains the asbestos seal material and the restriction of use, conventional seals material produce factory begins exploitation, development in succession for the asbestos seal material, and the development and application of no asbestos seal material becomes active, the most outstanding innovative technology in Seal field in the recent two decades.Enter after the nineties, advanced industrial country launches respectively rules such as " Clean Air Acts ", requirement to air quality in human lives and the Working environment is more and more higher, the what is called in past " does not have and leaks " requirement and upgraded to severeer " no loss " (Non-Fugitive Emmision) requirement, these have all greatly promoted the new development of gasket material and manufacturing technology, and novel non-asbestos seal Development of Materials and application have been taken off in the effort of searching asbestos substitute especially greatly.
More and more higher to the requirement of non-asbestos seal material in view of each branch of industry, domestic main sealing material production unit has been developed part non-asbestos seal material.But,, comprise that also aspects such as production cost, complete processing and range of application can't substitute the paronite sealing material fully at some material property.
The objective of the invention is: provide a kind of with non-asbestos fiber enhanced sealing elastomer material and be compressed into the technology of sheet material, make it have better tensile strength, suitable rate of compression, compression recovery performance and the loose ability of creep resistance preferably, and have advantages such as resistance toheat is good, medium-resistance is good, can substitute traditional asbestos rubber sealing material in the use range more widely.
Technical scheme of the present invention is: a kind of with non-asbestos fiber enhanced sealing elastomer material, comprise binding agent, fortifying fibre, inorganic physique filler and vulcanizing agent, anti-aging agent, softening agent, vulcanization accelerator, promoting agent, tinting material, its component and weight ratio are:
(1) described binding agent is a kind of in natural rubber, paracril, styrene-butadiene rubber(SBR), chloroprene rubber, the terpolymer EP rubber or their mixture, and its suitable content is that 7--20%, optimum content are 8--15%;
(2) described fortifying fibre is a kind of in polysulphonamide fiber (or pulp), aramid fiber (or pulp), carbon fiber (or carbonizedfibres), paper pulp fiber, glass fibre, the sepiolite fibre or their mixture, and its suitable content is that 45--80%, optimum content are 50--75%;
(3) described inorganic physique filler is a kind of in lime carbonate, talcum powder, magnesium oxide, barium sulfate, potter's clay, the carbon black or their mixture, and its suitable content is that 5--35%, optimum content are 10--30%;
(4) described vulcanizing agent is a kind of in sulphur, the dimorpholinyl disulfide or their mixture, and its suitable content is that 0.08--0.5%, optimum content are 0.1--0.4%;
(5) described anti-aging agent is a kind of in N-Phenyl beta naphthylamine, N-phenyl-N '-cyclohexyl Ursol D or their mixture, and its suitable content is that 0.10--0.5%, optimum content are 0.2--0.4%;
(6) described softening agent is a kind of in dibutyl phthalate, the triphenylphosphate or their mixture, and its suitable content is that 0.2--1.5%, optimum content are 0.25--0.75%;
(7) described vulcanization accelerator is a kind of in tetramethyl-thiuram disulfide, the N cyclohexyl 2 benzothiazole sulfenamide or their mixture, and its suitable content is that 0.08--0.75%, optimum content are 0.2--0.55%
(8) described promoting agent is a kind of in zinc oxide, the stearic acid or their mixture, and its suitable content is that 0.1--1.8%, optimum content are 0.6--1.0%;
(9) described tinting material be that phthalein is blue or green blue, phthalein is dark green, a kind of in the red iron oxide, chrome yellow, carbon black or their mixture, its suitable content is that 0.25--2%, optimum content are 0.3--1.5%.
The total amount that is made of above-mentioned each component is 100% mixture, by following prepared:
(1) refining of binding agent
At first rubber cement and softening agent are carried out mastication in mill, pull into small pieces by the pulling-on piece machine then, add gasoline or benzene again, the toluene equal solvent makes it be swelled into rubber cement;
(2) pre-treatment of fortifying fibre
At first fortifying fibre is screened, cut into the staple fibre (being generally 100--200) of certain length-to-diameter ratio then, and carry out necessary surface activation process, become puffy by the teaser shredding at last;
(3) spice
At first with fortifying fibre, inanimate matter filler, promoting agent, anti-aging agent, vulcanization accelerator, tinting material dried the copying 30 minutes in three roller spice machines handled well, added rubber cement and organic solvent stir about then 3--4 hour, the mixing material for making clothes that makes it become size, viscosity to suit;
(4) moulding
The material for making clothes of mixing is carried out on the Cheng Zhangji with cold roller and hot-rolling formation, at first hot-rolling is heated to about 100 ℃, dancer rools is apart from adding material for making clothes, make material for making clothes at hot-rolling last layer one formable layer, to institute's required thickness, stop to feed in raw material, slightly tight two rollers make cold roller carry out suitable compressing to sheet material, get final product lower plate then;
(5) sulfuration
The sheet material of forming carries out molded vulcanization on vulcanizing press, sulfide stress is that 3--Mpa, curing temperature are that 120--150 ℃, curing time are 20--40 minute, promptly gets sealing material of the present invention after sulfuration.
Advantage of the present invention is:
Adopt compressing and forming process, in rubber matrix, by introducing a fiber material (non-asbestos), enhancement by fiber, improve the intensity of material, heat-resisting, ageing-resistant, medium-resistance, there are ratio of components and preparation technology to improve the compression recovery performance of material by optimizing sealing material, creep relaxation property and other over-all properties, make the integrated performance index of compression non-asbestos fiber Reinforced Rubber sealing plate material of the present invention reach and surpass the technical requirements of domestic and international general no asbestos seal material, and can in a big way, substitute traditional paronite sealing material.
The invention will be further described below in conjunction with embodiment:
Embodiment one: carry out the starting material preparation by table 1:
Table 1 (Kg) natural rubber: 28 (9.6%) sulphur: 0.6 (0.2%) polysulphonamide fiber: 20 (6.8%) zinc oxide: 0.9 (0.3%) sepiolite fibre: 150 (51.3%) stearic acid: 0.28 (0.09%) paper pulp fiber: 50 (17.1%) tetramethylthiuram disulfides: 0.2 (0.06%) calcium carbonate: 20 (6.8%) N cyclohexyl 2 benzothiazole sulfenamides: 0.3 (0.1%) potter's clay: 16 (5.5%) N-PBNAs: 1.0 (0.3%) dibutyl phthalates: 1 (0.34%) iron oxide red: 4 (1.4%) gasoline: 160
With 28 kilograms of natural rubbers and 1 kilogram of dibutyl phthalate in mill mastication 7--10 minute, pull into small pieces by pulling the sheet machine then, add 28 kilograms of gasoline, made swell rubber about 3 hours; Will be through fragrant sulfone synthetic fibre staple fibre (diameter 0 is about 5mm for 00.5mm, length), sepiolite fibre, paper pulp fiber, lime carbonate, potter's clay, red iron oxide, sulphur, zinc oxide, stearic acid, tetramethyl-thiuram disulfide, N cyclohexyl 2 benzothiazole sulfenamide, N-Phenyl beta naphthylamine dried the copying 45 minutes in three roller spice machines that shredding is handled, add rubber cement and add about 132 kilograms of gasoline in batches, continued spice about 4 hours, discharging became to open after thing to be mixed became the suitable material for making clothes of granularity; Cheng Zhangqian will become open a machine big roller even heating to 100 ± 5 ℃, and dancer rools makes material for making clothes at hot-rolling last layer one formable layer apart from adding material for making clothes then, stops to feed in raw material to desired thickness, and slightly tight two rollers make pony roll suitably compress sheet material, unload plate then; The sheet material of Cheng Zhanghou is used the vulcanizing press molded vulcanization again, and its cure conditions is: sulfide stress 3.6Mpa, curing temperature are 140 ℃, and curing time is 30 minutes, and the sheet material after sulfuration is sealing material of the present invention.After testing, material property is as shown in table 2.Listed the technical indicator of domestic XB350 paronite in the table.
Table 2
| Sequence number | Technical feature | Unit | The XB350 technical indicator | Test value | Touchstone |
| 1 | Transverse tensile strength | MPa | ≥12.0 | 10.53 | ASTMF152 |
| 2 | Aging coefficient | ≥0.9 | 1.02 | GB/T541 | |
| 3 | Density | g/cm 3 | 1.6～2.0 | 1.83 | GB/T541 |
| 4 | Rate of compression | ％ | 12±5 | 15.8 | ASTMF36 |
| 5 | Rebound degree | ％ | ≥40 | 56.7 | ASTMF36 |
| 6 | The creep relaxation rate | ％ | ≤50 | 26.5 | ASTMF38 |
| 7 | Flexibility | Flawless | Flawless | GB/T3985 | |
| 8 | Loss on ignition | ％ | ≤30 | 27.5 | 800 ℃ * 1 hour |
| 8 | Resistance to air loss | cc/min | (1.0 maximum) | 0.57 | GB12385 (presses in the nitrogen: 2bar, gasket load: 20.7MPa) |
Embodiment two: substitute gasoline as impregnation and spice solvent with benzene (or toluene), formula for raw stock is pressed shown in the table 3.
Table 3 (Kg) natural rubber: 19 (7.05%) sulphur: 0.5 (0.19%) acrylonitrile-butadiene rubber: 19 (7.05%) zinc oxide: 4 (1.48%) polysulphonamide fibers: 20 (7.4%) stearic acid: 0.4 (0.148%) glass fibre: 145 (53.8%) tetramethylthiuram disulfides: 0.2 (0.07%) carbon fiber: 25 (9.3%) N cyclohexyl 2 benzothiazole sulfenamides: 0.4 (0.14%) calcium carbonate: 20 (7.4%) N-PBNAs: 1.0 (0.37%) potter's clay: 10 (3.7%) phthaleins are dark green: 1.0 (0.37%) dibutyl phthalates: 2 (0.7%) phenolic resins: 2 (0.74%) benzene: 200
Preparation technology is with embodiment one, and through check, performance is as shown in table 4, has listed the technical indicator of domestic NY300 paronite in the table.
The sealing material that makes according to proportioning of the present invention and preparation technology, its over-all properties has met or exceeded domestic and international general no asbestos seal material requirements, substantially reached the technical indicator of traditional paronite sealing material, can substitute traditional paronite sealing material within the specific limits, be a kind of no asbestos seal material with development prospect.
Table 4
| Sequence number | Technical feature | Unit | The NY300 technical indicator | Test value | Touchstone |
| 1 | Transverse tensile strength | MPa | ≥13.0 | 12.7 | ASTMF152 |
| 2 | Aging coefficient | ≥0.9 | 1.10 | GB/T541 | |
| 3 | Density | g/cm 3 | 1.6～2.0 | 1.87 | GB/T541 |
| 4 | Rate of compression | ％ | 12±5 | 7.9 | ASTMF36 |
| 5 | Rebound degree | ％ | ≥50 | 63.5 | ASTMF36 |
| 6 | The friendship relaxation rate of wriggling | ％ | ≤50 | 21.2 | ASTMF38 |
| 7 | Flexibility | Flawless | Flawless | GB/T3985 | |
| 8 | Resistance to air loss | cc/min | (1.0 maximum) | 0.32 | GB12385 (presses in the nitrogen: 2bar, gasket load: 20.7MPa) |
| Oil-proofness AS MFl46 | |||||
| 9 | The thickness increment rate | ％ | ≤25 | 12.4 | No. 1 oil of ASTM, 150 ℃, 5h |
| 10 | Weight increase | ％ | ≤15 | 13.2 | ASTM B oil fuel, room temperature, 5h |
Claims (5)
1. one kind with non-asbestos fiber enhanced sealing elastomer material, comprises binding agent, fortifying fibre, inorganic physique filler and vulcanizing agent, anti-aging agent, softening agent, vulcanization accelerator, promoting agent, tinting material, and its component and weight ratio are:
(1) a kind of in described natural rubber, paracril, styrene-butadiene rubber(SBR), chloroprene rubber, the terpolymer EP rubber as binding agent, its content is 7--20%;
(2) described fortifying fibre is a kind of in polysulphonamide fiber, aramid fiber, carbon fiber, paper pulp fiber glass fibre, the sepiolite fibre at least, and its content is 45--80%;
(3) described inorganic physique filler is a kind of in lime carbonate, talcum powder, magnesium oxide, barium sulfate, potter's clay, the carbon black at least, and its content is 5--35%;
(4) described vulcanizing agent is a kind of in sulphur, the dimorpholinyl disulfide at least, and its content is 0.08--0.5%;
(5) described anti-aging agent is a kind of in N-Phenyl beta naphthylamine, N-phenyl-N '-cyclohexyl Ursol D at least, and its content is 0.10--0.5%;
(6) described softening agent is a kind of in dibutyl phthalate, the triphenylphosphate at least, and its content is 0.2--1.5%;
(7) described vulcanization accelerator is a kind of in tetramethyl-thiuram disulfide, the N cyclohexyl 2 benzothiazole sulfenamide at least, and its content is 0.08--0.75%;
(8) described promoting agent is a kind of in zinc oxide, the stearic acid at least, and its content is 0.1--1.8%;
(9) described tinting material be that phthalein is blue or green blue, phthalein is dark green at least, a kind of in the red iron oxide, chrome yellow, carbon black, its content is 0.25--2%.
2. according to claim 1 with non-asbestos fiber enhanced sealing elastomer material, it is characterized in that: the content of described binding agent is that the content of 8--15%, fiber enhancer is that the content of 50--75%, inorganic physique filler is that the content of 10--30%, vulcanizing agent is that the content of 0.1--0.4%, anti-aging agent is that the content of 0.2--0.4%, softening agent is that the content of 0.25--0.75%, vulcanization accelerator is that the content of 0.2--0.55%, promoting agent is that the content of 0.6--1.0%, tinting material is 0.3--1.5%.
3. according to claim 1 with non-asbestos fiber enhanced sealing elastomer material, it is characterized in that: can add 0.74% resol in the described component as properties-correcting agent.
4. one kind is compressed into the technology of sheet material with claim 1,2 or 3 described sealing elastomer materials, comprises the refining of binding agent, pre-treatment, spice, moulding and five processes of sulfuration of fortifying fibre, and its step and condition are:
(1) described binding agent refining process is: at first rubber and softening agent are carried out mastication in mill, pull into small pieces by the pulling-on piece machine then, add solvent again and make it be swelled into rubber cement;
(2) preprocessing process of described fortifying fibre is: at first fortifying fibre is screened, cut into the staple fibre of certain length-to-diameter ratio then, and carry out necessary surface activation process, become puffy by the teaser shredding at last;
(3) described spice process is: at first with fortifying fibre, inanimate matter filler, promoting agent, anti-aging agent, vulcanization accelerator, tinting material dried the copying 30 minutes in three roller spice machines handled well, add rubber cement and organic solvent then and stirred 3--4 hour, the mixing material for making clothes that makes it become size, viscosity to suit;
(4) described moulding process is carried out on the Cheng Zhangji with cold roller and hot-rolling formation, moulding process is: at first hot-rolling is heated to about 100 ℃, dancer rools is apart from adding material for making clothes, make material for making clothes at hot-rolling last layer one formable layer, to institute's required thickness, stop to feed in raw material, slightly tight two rollers make cold roller carry out suitable compressing to sheet material, get final product lower plate then;
(5) described sulfidation is carried out on vulcanizing press, and sulfide stress is that 3-3.6Mpa, curing temperature are that 120--150 ℃, curing time are 20--40 minute.
5. technology according to claim 4 is characterized in that: the solvent that adds in the described binding agent refining process is a kind of in gasoline, benzene, the toluene.
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| CN 00111702 CN1128175C (en) | 2000-02-16 | 2000-02-16 | Sealing elastomer material reinforced by non-asbestos fibres and technology for compressing it into plates |
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| CN 00111702 CN1128175C (en) | 2000-02-16 | 2000-02-16 | Sealing elastomer material reinforced by non-asbestos fibres and technology for compressing it into plates |
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| CN1128175C true CN1128175C (en) | 2003-11-19 |
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2000
- 2000-02-16 CN CN 00111702 patent/CN1128175C/en not_active Expired - Lifetime
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| CN1721484B (en) * | 2004-07-13 | 2011-03-09 | 舟山市海山密封材料有限公司 | Rubber sealed and shock-reducing sound-absorbent material coated on metal sheet and method for preparing same |
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| CN1263903A (en) | 2000-08-23 |
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