CN102181267B - Low-fiber-content high-filler-content sealing pad - Google Patents
Low-fiber-content high-filler-content sealing pad Download PDFInfo
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- CN102181267B CN102181267B CN 201110050509 CN201110050509A CN102181267B CN 102181267 B CN102181267 B CN 102181267B CN 201110050509 CN201110050509 CN 201110050509 CN 201110050509 A CN201110050509 A CN 201110050509A CN 102181267 B CN102181267 B CN 102181267B
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Abstract
The invention relates to a low-fiber-content high-filler-content sealing pad which is free of asbestos and has the characteristics of liquid resistance, temperature resistance and low burning loss. The low-fiber-content high-filler-content sealing pad is prepared by the following steps: preparing a water suspension slurry from paper pulp, inorganic filler, latex, rubber ingredient and material structure reinforcer, forming by a handsheet former, dewatering, drying, calendering and vulcanizing. The slurry treated by the handsheet former is prepared from the following materials in percentage by mass: 7-20% of paper pulp, 65-85% of inorganic filler, 4-10% of latex and rubber ingredient, and 0.1-5% of material structure reinforcer. The low-fiber-content high-filler-content sealing pad has the advantages of high universality, simple formula, cheap and accessible raw materials, simple proportioning technique and strong cost price advantage.
Description
Technical field:
The invention belongs to the technical field of sealing material preparation, particularly a kind of asbestos that do not contain, sealed bolster plate with anti-liquid, heatproof, low loss on ignition performance characteristic.
Background technology:
The sealed bolster plate that uses as flat seal in sealing material is divided into roll-in plate and collecting plate two large classes because of the difference of production technique, again because whether containing in the raw material that asbestos are divided into asbestos plate and without asbestos plate two large classes.Although China seals on the market at present still take asbestos plate as main; but along with the attention of people to environment protection; sealing material imperative without asbestosization; but make a general survey of in these years disclosed Patent Application Publication and the market situation of understanding; still having weak point without asbestos collecting plate technical field, this moves towards without asbestosization very for unfavorable China comprehensively.
For example prior art all adopts higher fibre content without the asbestos collecting plate, although this with asbestos collecting plate technology in fibrous magnesium silicate content situation about reaching about 45% coincide, but owing to all there is huge difference in existing other fibers except asbestos with fibrous magnesium silicate, complete different result can appear in same high fibre content.Asbestos are a kind of superfine fiber after shredding, and short in any case, it all has good length-to-diameter ratio; It is again a kind of mineral fibre, and born is high temperature resistant, adds in any case also can not affect the temperature tolerance of material; The surface property of fibrous magnesium silicate congenitally can have preferably with the rubber-like polymer again and engages, so asbestos can serve as the dual role of fiber and filler.Although and other also have higher temperature tolerance such as inorganic fibre, comparing with fibrous magnesium silicate is that diameter is thick, rigidity large, smooth surface, in case add to such an extent that many intensity differences, impermeabilisation of just existing are poor, namely has the poor risk of stopping property.If organic fibre accounts for manyly, the high temperature ablation rate will rise, the long-lasting risk that exists of heatproof.
Organic synthetic fibers, carbon fiber etc. all are the very expensive materials of price in addition, and being used in the collecting plate the inside from economically also is to be difficult to substitute asbestos.As an example of aromatic polyamide fibre (aramid fiber) example and asbestos relatively:
| ? | Price (Renminbi) | Temperature tolerance |
| Asbestos | 0.1 ten thousand yuan/tons | 530℃ |
| Aramid fiber | 140,000 yuan/tons | 300℃ |
Aramid fiber surpasses 260 ℃ in actual use, and it is long-lasting just to lack heatproof, and the temperature tolerance of other organic synthetic fibers is also poorer than aramid fiber.
Have to avoid at 2 at the road of carrying out without asbestos, the one, in numerous occasions that need mechanical seal, some working condition inevitable requirement sealing material possesses higher long-acting temperature tolerance and Burning corrosion resistance, such as the sealing of vapour, diesel motor bonnet; The 2nd, the cost value factor.Asbestos material is cheap, if non-asbestos material can not have breakthrough increasing substantially cost performance, China will increase many difficulties on realizing without the road of asbestos.
Publication number be the Chinese invention patent of CN1423074A disclose a kind of with special composite cotton substitute asbestos prepare sealing plate technique, the method for making of this special composite cotton is to enter after the mixing such as multiple fiber and powdered rubber is fluffy in the space of a sealing ceaselessly to fly upward, resin solution or rubber and plastic solution are gone to the material surface spray of flying upward, be coated with last layer properties-correcting agent film, drying, pulverization process replace asbestos to join paper machine and copy the slurry of taking again.The content of this special composite cotton in the finished product sealing plate is 32-55%.This technique is obviously too complicated, and the composite cotton fabric consumption is also on the high side.
Publication number is that the Chinese invention patent application of CN1724606A discloses and a kind ofly replaces asbestos to follow the example of the gasket seal that makes with copying with aromatic polyamide fibre (aramid fiber), comprises the above-mentioned organic fibre more than 30% in the sealing pad.Obviously, its price of the gasket of aramid fiber content more than 30% is very surprising.
The patent No. is the manufacture method that the Chinese invention patent of ZL 200410015794.5 discloses a kind of non-asbestos fibre Latex Gasket Sheet Crosslinked sheet material, and the used non-asbestos fiber of the method is one or more mixture of aramid fiber or its pulp, polysulphonamide fiber or its pulp, phenolic fibre, glass fibre, carbon fiber, steel fiber and fibrous sepiolite.The ratio of non-asbestos fiber in prescription is 35-70%.Have equally the problem that cost of material is too high, fiber consumption is too much, and sepiolite being the asbestoid fiber, is not non-asbestos material completely.
Publication number is that the Chinese invention patent application of CN1847355A discloses a kind of screened sealing material without asbestos fiber and preparation method thereof, and the weak point of the method is to have used simultaneously fiber more than 5 kinds, and the immersion of putting together, wheel grind, mill, making beating.Among these 5 kinds of fibers, mineral wool fibre, short glass fiber, ceramic fiber all are fragile fibres, and aramid fiber, polyacrylonitrile fibre, polyamide fibre fibrid, cellulosic fibre all are the snappiness fibers, this has not only increased the technologic difficulty of fiber treatment, and is difficult to the effect that reaches desirable.
Publication number is that the Chinese invention patent application of CN 101696727A discloses a kind of motor car engine, wheel box special sealing plate material, this material uses four kinds of fibers simultaneously, fiber accounts for 61% in material, three kinds of organic fibres such as aramid fiber, nylon fiber have namely accounted for 36% in material.
From another point of view, no matter long mesh paper making machine or cylinder mould machine all have certain requirement to the wet tenacity of material.Concerning copying of prior art followed the example of, reduce merely fiber consumption and in the production way, can often be broken or breakage toward appointing, this also is that fiber uses one of general reason on the high side in the prior art.
Summary of the invention:
The technical problem to be solved in the present invention is to overcome deficiency of the prior art, proposes a kind of low fine content high-filler-content sealing pad.Copy with raising and to get type non-asbestos gasket material temperature tolerance, Burning corrosion resistance is taken into account oil-proofness, permeability resistance simultaneously; When reducing fiber, latex consumption, improve material dry strength and wet tenacity; Reduce production costs simultaneously.
The present invention is achieved by the following technical measures.A kind of low fine content high-filler-content sealing pad, by paper pulp, mineral filler, latex and rubber ingredients, titanic acid ester are made the aqueous suspension slurry, copy through the paper machine get, dewater, dry, calendering sulfuration makes, it is characterized in that paper supplying machine copies the slurry got in the dry mass per-cent that feeds intake, comprise the preparation that feeds intake of following ratio:
Described paper pulp comprises the used softwood pulp of paper industry, hardwood pulp, straw pulp, reed pulp, bamboo pulp, useless cloth slurry, paper waste, can be wherein one or several.
Described titanic acid ester comprises Monoalkoxy-titanates, chelating titanate, corrdination type titanic acid ester, titanic acid ester polycondensate, can be the titanate compound of single variety, also can be more than two kinds and two kinds titanate compound.
Having adopted paper pulp fiber in the technical scheme of the present invention is suitable as main material skeleton, because other organic fibres are without any advantage aspect anti-ablation, and paper pulp fiber can satisfy the requirement of strength of materials aspect.Can be inorganic fibre and mineral filler for material improves the alternative of anti-ablation ability, can suitably add the inorganic fibres such as rock wool, ceramic fiber, glass fibre in the paper pulp fiber, but it is limited to improving the contribution of strength of materials aspect that inorganic fibre is found in research, the permeability resistance of opposing mutually material has negative impact, with many strength degradation that also can make material, also should strictly control addition even therefore add inorganic fibre in the paper pulp, generally be no more than 20% of fiber total amount.And among the easier network structure that enters paper pulp fiber of mineral filler.The meaning of use latex is to play the effect of tackiness agent, but latex lacks anti-ablation ability, uses to such an extent that many material loss on ignitions that can make increase.Having adopted titanic acid ester in the technical scheme of the present invention is the material structure toughener, has obtained beyond thought effect, has realized that material has enough working strengths under low fiber, low glue, high filler condition, and preferably over-all properties is arranged.Also obtained in process of production preferably wet tenacity, production can be carried out smoothly.
According to technical scheme of the present invention, manufacture method at first is that paper pulp, mineral filler, latex and rubber ingredients, titanic acid ester are made the aqueous suspension slurry, wherein the processing of paper pulp can be with reference to the treatment process of paper industry, proven technique fully, pulp density after the processing is 2-5% (W/V), measure with oven drying method, with the concentration measured for the foundation that feeds intake.
There is no particular limitation for the kind of mineral filler, and such as talcum, calcium carbonate, wollastonite, mica, vermiculite, wilkinite, attapulgite, kaolin, diatomite, carbon black etc. can be used single variety filler or several fillers;
Also there is no particular limitation for the kind of latex, and such as butyronitrile latex, butadiene-styrene latex, fourth pyrrole latex, neoprene latex, natural emulsion, acrylic acid or the like latex etc. can be used single variety latex or several latexes;
In technical scheme of the present invention, rubber and rubber ingredients have also been used.These rubber ingredients comprise sulphur, zinc oxide, promotor, anti-aging agent.Take the weight of rubber dry-matter as 1 part, the dispersion of milling of 0.05 part in sulphur, 0.05 part in zinc oxide, 0.03 part of promotor, 0.02 part in anti-aging agent, water.When being added with carbon black in the filler, can jointly mill with carbon black.Selecting of promotor, anti-aging agent can with reference to the mature technology of rubber industry, be not particularly limited.
Titanic acid ester, comprise and contain monoalkoxytitanates, contain alcoxyl second carboxyl titanic acid ester, contain 2-hydroxypropyl carboxyl titanic acid ester, contain second two support titan-alkoxide acid esters, phosphorous acidic group titanic acid ester, phosphoric acid ester group titanic acid ester, contain tetra-sodium base titanic acid ester, contain tetra-sodium ester group titanic acid ester, contain the sulfonic group titanic acid ester, containing the titanic acid ester of phosphorous acid ester aglucon and alkanolamine titanic acid ester, trolamine titanic acid ester, titanic acid ester polycondensate etc., can be wherein one or several.
Above-described each component material all is the commercially available material, all can buy on market.
Above-mentioned each constituent materials is made into for copying the aqueous suspension slurry of taking, and its method is known stirring means.Input step as raw material has no particular limits, be preferably first treated paper pulp and filler are mixed, form preliminary aqueous suspension, then add while stirring each follow-up component, be diluted with water to the aqueous suspension slurry of 1-3%, copy with cylinder mould machine or long mesh paper making machine and get, through dehydration, drying, with the calendering of the two roller vulcanizers that can heat or glazing calender, press polish, realize simultaneously sulfuration.The temperature of vulcanizer or rolling press is controlled at 120-140 ℃, and speed is per minute 5-15 rice, and roller space require to be regulated according to material thickness, can repeatedly roll in case of necessity, press polish, until product meets sulfuration and thickness requirement.
After the present invention adopts abovementioned technology, prepared low fine content high-filler-content sealing pad has preferably anti-liquid, ablation resistance, highly versatile and prescription are succinctly, starting material are cheap and easy to get, proportioning process is simple, have stronger cost value advantage and the prospect of alternative asbestos emulsoid wet material.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1: take by weighing respectively
Add in the pulp suspension of 1000Kg3.2% concentration, it is a to add the slurry of milling in advance with 6Kg carbon black, 1.2Kg zinc oxide, 1.2Kg sulphur, 0.8Kg Vulcanization accelerator TMTD, 0.4Kg antioxidant D again, stir, add while stirring the latex 45Kg of 40% solid content; Add titanic acid ester 15Kg, mix, thin up makes into concentration and is 2.5% slurry, copy through the paper machine get, dewater, dry, 130 ℃ of calendering sulfurations, make the low high packing seal backing plate of fiber.
Embodiment 2: take by weighing respectively
Add in the pulp suspension of 1400Kg3.2% concentration, it is a to add the slurry of milling in advance with 4Kg carbon black, 1.2Kg zinc oxide, 1.2Kg sulphur, 0.8Kg Vulcanization accelerator TMTD, 0.4Kg antioxidant D again, stir, add while stirring the latex 35Kg of 40% solid content; Add titanic acid ester 12Kg, mix, thin up makes into concentration and is 2.5% slurry, copy through the paper machine get, dewater, dry, 130 ℃ of calendering sulfurations, make the low high packing seal backing plate of fiber
Comparative example 1: the prescription A according to the embodiment one of the manufacturing forming process method of patent No. ZL 200410015794.5 non-asbestos fibre Latex Gasket Sheet Crosslinked sheet materials makes non-asbestos fibre Latex Gasket Sheet Crosslinked sheet material
Comparative example 2: the embodiment one prescription B according to the manufacturing forming process method of patent No. ZL 200410015794.5 non-asbestos fibre Latex Gasket Sheet Crosslinked sheet materials makes non-asbestos fibre Latex Gasket Sheet Crosslinked sheet material (comparative example material B).
In view of sealed bolster plate there is no unified performance index, with the physical performance index of building material industry standard JC/T 554-94 " asbestos emulsoid wet board " regulation, the foundation as mutual comparison and contrast the results are shown in following table temporarily:
The material that above-mentioned each example makes and commercially available product deep fat soak back draft loss of strength rate relatively
Annotate: ASTM, American Society for Testing and Materials is the english abbreviation of American Society Testing and Materials, No. 3 oil of ASTM are test oil that State Standard of the People's Republic of China GB/T20671.1-2006 adopts.
Claims (3)
1. one kind is hanged down fine content high-filler-content sealing pad, by paper pulp, mineral filler, latex and rubber ingredients, titanic acid ester are made the aqueous suspension slurry, copy through the paper machine get, dewater, dry, calendering sulfuration makes, it is characterized in that: paper supplying machine is copied the slurry got in the dry mass per-cent that feeds intake, and comprises the preparation that feeds intake of following ratio:
2. a kind of low fine content high-filler-content sealing pad according to claim 1 is characterized in that: used paper pulp comprises one or several in the used softwood pulp of paper industry, hardwood pulp, straw pulp, reed pulp, bamboo pulp, useless cloth slurry, the paper waste.
3. a kind of low fine content high-filler-content sealing pad according to claim 1, it is characterized in that: used titanic acid ester comprises one or several in Monoalkoxy-titanates, chelating titanate, corrdination type titanic acid ester, the titanic acid ester polycondensate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110050509 CN102181267B (en) | 2011-03-03 | 2011-03-03 | Low-fiber-content high-filler-content sealing pad |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110050509 CN102181267B (en) | 2011-03-03 | 2011-03-03 | Low-fiber-content high-filler-content sealing pad |
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| Publication Number | Publication Date |
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| CN102181267A CN102181267A (en) | 2011-09-14 |
| CN102181267B true CN102181267B (en) | 2013-03-20 |
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| CN 201110050509 Expired - Fee Related CN102181267B (en) | 2011-03-03 | 2011-03-03 | Low-fiber-content high-filler-content sealing pad |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622080B (en) * | 2015-12-30 | 2018-04-24 | 山东鲁阳节能材料股份有限公司 | A kind of ceramic fibre sealed bolster plate and preparation method thereof |
| CN107345775A (en) * | 2016-05-05 | 2017-11-14 | 四平维克斯换热设备有限公司 | A kind of gasket seal for heat-exchangers of the plate type |
| CN107653751A (en) * | 2017-10-12 | 2018-02-02 | 蚌埠市天网渔需用品有限公司 | One kind, which prepares wearability fish, needs wood pulp auxiliary material and preparation method thereof used in articles for use packing board |
| CN107663806A (en) * | 2017-10-12 | 2018-02-06 | 蚌埠市天网渔需用品有限公司 | One kind, which prepares high intensity fish, needs wood pulp auxiliary material and preparation method thereof used in articles for use packing board |
| CN107805971A (en) * | 2017-10-12 | 2018-03-16 | 蚌埠市天网渔需用品有限公司 | One kind, which prepares acid resistance fish, needs wood pulp auxiliary material and preparation method thereof used in articles for use packing board |
| CN109837798A (en) * | 2019-03-21 | 2019-06-04 | 大连工业大学 | A kind of preparation method of plant fiber-based waterproof and sealing material |
Citations (4)
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| CN1263903A (en) * | 2000-02-16 | 2000-08-23 | 太仓市宝马密封材料有限公司 | Sealing elastomer material reinforced by non-asbestos fibres and technology for compressing it into plates |
| CN1487010A (en) * | 2003-08-04 | 2004-04-07 | 山东烟台石棉制品总厂 | Non-asbestos stool plate and its making process |
| CN1557865A (en) * | 2004-01-13 | 2004-12-29 | 上海大学 | Process for preparation formation of nonasbestos fibre enhanced latex sealing plate |
| CN101575829A (en) * | 2009-05-22 | 2009-11-11 | 昆明理工大学 | Method for preparing copy sheet used for sealing gasket |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CL2007003549A1 (en) * | 2006-12-07 | 2008-06-20 | Garlock Sealing Technologies | PROCESS FOR MANUFACTURING PASTE OR MASS TO FORM COMPRESSED SHEET PACKING MATERIAL THAT CONSISTS OF MIXING TER-BUTIL ACETATE WITH AN AMOUNT OF ELASTOMERO, SO THAT THIS IS DISSOLVED IN THE TER-BUTIL ACETATE AND MIXED IN THE ELASTOMERO |
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- 2011-03-03 CN CN 201110050509 patent/CN102181267B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263903A (en) * | 2000-02-16 | 2000-08-23 | 太仓市宝马密封材料有限公司 | Sealing elastomer material reinforced by non-asbestos fibres and technology for compressing it into plates |
| CN1487010A (en) * | 2003-08-04 | 2004-04-07 | 山东烟台石棉制品总厂 | Non-asbestos stool plate and its making process |
| CN1557865A (en) * | 2004-01-13 | 2004-12-29 | 上海大学 | Process for preparation formation of nonasbestos fibre enhanced latex sealing plate |
| CN101575829A (en) * | 2009-05-22 | 2009-11-11 | 昆明理工大学 | Method for preparing copy sheet used for sealing gasket |
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| CN102181267A (en) | 2011-09-14 |
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