CN104727903A - Ceramic fiber sealing gasket and manufacturing method thereof - Google Patents

Ceramic fiber sealing gasket and manufacturing method thereof Download PDF

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CN104727903A
CN104727903A CN 201510043671 CN201510043671A CN104727903A CN 104727903 A CN104727903 A CN 104727903A CN 201510043671 CN201510043671 CN 201510043671 CN 201510043671 A CN201510043671 A CN 201510043671A CN 104727903 A CN104727903 A CN 104727903A
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sealing gasket
drying
ceramic fiber
parts
ceramic
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CN 201510043671
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CN104727903B (en )
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王志博
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河南省西峡开元冶金材料有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection
    • Y02A50/20Air quality improvement or preservation
    • Y02A50/23Emission reduction or control
    • Y02A50/232Catalytic converters
    • Y02A50/2322Catalytic converters for exhaust after-treatment of internal combustion engines in vehicles

Abstract

The invention discloses a ceramic fiber sealing gasket and a manufacturing method thereof and belongs to the technical field of motor vehicle exhaust aftertreatment. The ceramic fiber sealing gasket comprises, by weight, 0-99 parts of ceramic fibers which are treated with the silane coupling agent, 0-99 parts of ceramic fibers which are not treated chemically, 0-60 parts of expanding materials, 1-15 parts of binding agent, 0-5 parts of packing and 0-5 parts of additive. The manufacturing method of the ceramic fiber sealing gasket comprises the steps of slurry preparation, dipnetting forming, drying and cut forming. The ceramic fiber sealing gasket and the manufacturing method thereof are used for motor vehicle exhaust aftertreatment.

Description

一种陶瓷纤维密封衬垫及其制备方法 A ceramic fiber seal gasket and preparation method

技术领域 FIELD

[0001] 本发明涉及一种陶瓷纤维密封衬垫及其制备方法,属于机动车尾气后处理技术领域。 [0001] The present invention relates to a ceramic fiber seal gasket and a preparation method, belonging to the field of vehicle exhaust after treatment technology.

背景技术 Background technique

[0002] 汽车三元催化器、柴油机氧化催化转化装置、柴油机选择性催化还原装置和柴油机颗粒过滤器等污染控制装置被广泛应用于机动车尾气后处理领域,对内燃机排出的废气进行处理,使之达到合格的排放标准,以控制大气污染。 [0002] Three-way catalytic converter, a diesel oxidation catalytic converter device, the selective catalytic reduction apparatus diesel particulate filters and diesel pollution control device are widely used in the field of vehicle exhaust gas treatment, the exhaust gas discharged from the internal combustion engine are processed, so that the reached the required emission standards, in order to control atmospheric pollution. 这些装置一般都包括一个或多个污染控制单元,每个单元中包含陶瓷载体、金属壳体、密封衬垫。 These devices typically comprise one or more pollution control units, each unit comprising a ceramic carrier, the metal case, the sealing gasket.

[0003] 由于陶瓷载体的热膨胀系数比作为其容器的金属壳体低10倍左右,高温下两者间隙增大。 [0003] Since the thermal expansion coefficient of about 10 times lower than that of the ceramic support as a metal container housing, both of the gap increases at high temperatures. 密封衬垫在常温与高温下均具有足够的膨胀性能,足以补偿载体与壳体之间的扩大间隙,在整个工作温度区间内起到固定、减震、密封、隔热、消音的作用。 At room temperature and the sealing liner has a sufficiently high temperature expansion properties, sufficient to compensate for the expansion of the gap between the carrier and the housing, secured to play the entire operating temperature range, shock absorption, sealing, insulation, silencing effect. 陶瓷载体具有硬、脆、易碎裂的特点,若载体碎裂则污染控制单元即失效。 Ceramic carrier has a hard, brittle, easily fractured characteristics, if the carrier fragmentation pollution control unit lapse. 密封衬垫不能提供均匀的膨胀力是导致载体碎裂的重要原因之一,因此对衬垫中膨胀性材料的分散性、密封衬垫整体的均匀性提出了要求。 Sealing liner can not provide a uniform expansion force of the carrier is one of the important causes fragmentation, therefore liner dispersibility, homogeneity entire expandable sealing liner material proposed requirements. 由于机动车需要在运行与熄火两种工况交替运行,污染控制单元的温度也随之在常温与高温之间交替,载体与壳体之间的间隙也随之扩大与缩小,对密封衬垫的机械耐久性提出了要求。 Since the vehicle needs to run and turn off alternately in operation two conditions, the temperature of the pollution control means also will alternate between the normal and high temperature, the clearance between the carrier and the housing also expanded and shrink, sealing gasket mechanical durability made requests. 密封衬垫的边缘暴露在高温尾气气流中,对密封衬垫的耐吹蚀性能提出了要求。 Edge seal gasket is exposed to high temperature exhaust gas stream of wind erosion resistance performance of the sealing gasket proposed requirements.

[0004] 公开号为CN102421598A的中国专利公布了一种无机纤维与聚合物纤维复合的密封衬垫,该衬垫具有良好的柔性,但由于其中含有的聚合物纤维在高温下烧失,该产品并不具备良好的机械耐久性和耐吹蚀性能;公开号为CN101755024B的中国专利公布了一种表面涂覆压敏胶的无机纤维密封衬垫,公开号为CN101772626A的中国专利公布了一种使用热活化粘合剂的无机纤维密封衬垫,公开号为CN101331255B的中国专利公布了一种干法制作长、短无机纤维混合物密封衬垫的工艺,上述三种产品并不具有良好的机械耐久性和耐吹蚀性能;公开号为CN100478169C的中国专利公布了一种由膨胀性能不同的两层无机纤维衬垫组合构成的复合型密封衬垫及其制造方法,公开号为CN101115688B的中国专利公布了一种由生物可溶性无机纤维和经过热处理的无机纤维复合的密封衬垫及其制备工艺, [0004] Publication No. CN102421598A Chinese patent discloses a polymeric fiber and inorganic fiber composite sealing gasket, the gasket having a good flexibility, but which contained polymer fibers burned at high temperature, the product It does not have good mechanical durability and resistance to wind erosion properties; Chinese Patent Publication No. CN101755024B published inorganic fibers a surface coated with pressure sensitive adhesive sealing gasket is disclosed in China Patent No. CN101772626A discloses a use of inorganic fibers heat activated adhesive sealed liner Publication No. CN101331255B Chinese patent discloses a dry production of long and short inorganic fiber mix sealing liner process, the three products do not have good mechanical durability properties and resistance to wind erosion; Publication No. of China Patent Publication CN100478169C composite sealing gasket manufacturing method thereof by the expansion properties of different compositions of inorganic fibrous substrate of two layers, Chinese Patent Publication No. CN101115688B the published one kind of a bio-soluble inorganic fibers and the inorganic fibers after the heat treatment of the composite sealing gasket and its preparation process, 公开号为CN1806101A的中国专利公布了一种具有溶胶-凝胶法制备的陶瓷纤维纤维层与硅酸镁铝玻璃纤维层复合结构的密封衬垫,这三种方法制备的密封衬垫拥有稳定的机械耐久性,但原材料成本很高;公开号为CN1128923C的中国专利公布了一种退火陶瓷纤维与陶瓷多晶纤维混合物组成的密封衬垫,具有良好的耐吹蚀性能,但原材料成本很高。 Disclosed in Chinese patent No. CN1806101A discloses a sol having - a ceramic fiber layer A gel prepared with the composite structure of the sealing liner magnesium aluminum silicate glass fiber layer, sealing liner prepared by three methods which have stable mechanical durability, but the high cost of raw materials; Publication No. of China Patent CN1128923C published a sealing liner one kind of ceramic fibers and annealed ceramic fibers consisting of a mixture of polymorphs, has good resistance to wind erosion performance, high raw material costs. 综述, 上述几种密封衬垫虽然拥有良好的性能,然而由于其使用的材料和工艺,生产成本居高不下。 Summary of the sealing gasket, although several have good performance, but because of its materials and processes used, high production costs. 公开号为CN101900020B的中国专利公布了一种挤压成型的复合型密封衬垫,包含石墨-无机纤维复合层与蛭石-无机纤维复合层,但石墨的引入会导致密封衬垫隔热性能的下降,该产品已被市场淘汰;公开号为CN102877918A的中国专利公布了一种使用金属纤维的密封衬垫,但金属纤维的隔热性能太差,不能应用于实际;公开号为CN102465740A的中国专利公布了一种使用干法挤面皮工艺制作的无机纤维密封衬垫,公开号为CN100554658C和CN101260822B的中国专利公布了真空抽滤、复合成型的密封衬垫,三者的共同特点是密封衬垫不均匀性大,在实际应用中极易造成载碎裂失效。 Chinese Patent Publication No. CN101900020B published a composite molding an extruded sealing liner comprising graphite - inorganic fiber composite layer and vermiculite - inorganic fiber composite layers, but leads to the introduction of graphite sealing liner thermal insulation properties drop, the product has been out of the market; Publication No. CN102877918A Chinese patent discloses a sealing liner using metal fibers, but poor thermal properties of the metal fibers can not be applied to practical; disclosed in Chinese patent No. CN102465740A published inorganic fibers using a dry seal gasket extrusion dough making process, Publication No. CN100554658C CN101260822B and Chinese Patent Publication vacuum filtration, sealing gasket forming a composite, three common feature is not sealing gasket even large, can easily result in practical applications contained fragmentation failure. 除此之外,国内厂家的产品对密封衬垫的机械耐久性和耐吹蚀性能缺乏理解和关注,导致国产密封衬垫性能长时间落后于世界先进水平。 In addition, domestic manufacturers of products lack of understanding and concern for mechanical durability and resistance to wind erosion performance of the sealing gasket, resulting in domestic sealing gasket performance for a long time behind the world advanced level.

发明内容 SUMMARY

[0005] 本发明为了上述解决问题,进而提供了一种陶瓷纤维密封衬垫及其制备方法。 [0005] The present invention is to solve the above problems, thereby providing a ceramic fiber sealing gasket and its preparation method.

[0006] 本发明为解决上述技术问题采取的技术方案是:方案一:一种陶瓷纤维密封衬垫,其特征在于:所述衬垫由硅烷偶联剂处理后的陶瓷纤维,未经化学处理的陶瓷纤维,膨胀材料,粘合剂、填料和添加剂制成,其中硅烷偶联剂处理后的陶瓷纤维的重量份数为〇~ 99,未经化学处理的陶瓷纤维的重量份数为0~99,膨胀材料的重量份数为0~60,粘合剂的重量份数为1~15,填料的重量份数为0~5,添加剂的重量份数为0~5 ; [0006] The present invention is to solve the above problems taken technical solution: a program: a ceramic fiber sealing gasket, characterized in that: said ceramic fiber pad the silane coupling agent treatment, non-chemically treated made of ceramic fibers, intumescent material, a binder, fillers and additives, wherein the weight parts of ceramic fiber after the silane coupling agent treatment is square to 99, parts by weight of ceramic fibers without chemical treatment is 0 to 99, parts by weight of the expandable material is 0 to 60, parts by weight of the binder is 1 to 15, parts by weight of the filler is from 0 to 5, parts by weight of additives from 0 to 5;

[0007] 方案二:所述方法包括如下步骤:步骤一、配浆:将定量的化学处理后的陶瓷纤维、未经化学处理的陶瓷纤维、膨胀材料、填料加入水中,加入分散剂,配成纤维浓度为3~ 6%的混合物,再加入消泡剂后,施加高速搅拌对浆料中的固体加以分散使其分布均匀,分散时间为2~30分钟,然后依次添加粘合剂和表面活性剂,在持续的低速搅拌下加入絮凝剂,使浆料中的纤维絮凝成团,膨胀材料与填料被包裹在纤维絮团中。 [0007] Scheme II: the method comprising the following steps: a step, with slurry: The amount of the chemical treatment of ceramic fibers, ceramic fibers without chemical treatment, the expandable material, a filler added to the water, addition of a dispersant, dubbed fiber concentration of 3 to 6% of the mixture, after the addition of an antifoaming agent, is applied to the high-speed stirring dispersion of solids in the slurry to be distributed uniformly, the dispersion time of 2 to 30 minutes, followed by adding a binder and a surfactant agent, the flocculating agent is added under continuous stirring at low speed, the fiber slurry flocculating into groups, the expansion of the filler material is wrapped in a fiber floc. 膨胀材料和填料也可以在纤维絮凝之后再加入; Intumescent material and filler may be added after the fiber flocculation;

[0008] 步骤二、抄网成型:将配好的浆料注入放置在真空箱内渗透性丝网之上的成型模具中,静置1-20秒,使浆料中各个纤维絮团之间充分交织,真空度为0. 05~0.IMPa,使用压辊压制衬垫湿坯,除去模具,使用抄板将衬垫湿坯从渗透性丝网上取下; [0008] Step two, dip net molding: injection with a good slurry was placed over a vacuum chamber mesh permeable forming mold and allowed to stand 1-20 seconds to allow the slurry between the individual fibers floc full interleaving, the degree of vacuum of 0. 05 ~ 0.IMPa, liner using a press roller pressing the wet preform, the mold is removed using a wet copy board blank is removed from the pad permeable wire mesh;

[0009] 步骤三、干燥:干燥方法为对流干燥或微波干燥或两者的结合;当仅使用对流干燥时,热干空气温度控制在60~120°C,干燥时间为1~12小时;当仅使用微波干燥时,微波频率在2450兆赫干燥时间为0. 5~2小时;当对流干燥和微波干燥结合使用时,先利用对流干燥除去密封衬垫中的水分,再使用微波干燥重点对衬垫中心进行加热干燥,除去剩余的水分; [0009] Step three, drying: convective drying method is drying or microwave drying, or a combination of both; when only convection drying, hot dry air temperature was controlled at 60 ~ 120 ° C, the drying time is 1 to 12 hours; when when using only microwave drying, microwave frequency 2450 MHz the drying time is 0.5 to 2 hours; when convection drying and microwave drying used in combination, the first convection drying to remove water using a sealing gasket, and then dried using a microwave focused on the liner center of the pad is heated and dried to remove excess moisture;

[0010] 步骤四、切割成型:将干燥后的密封衬垫半成品进一步,按照实际要求的加工图纸,使用激光切割、冲压成型的加工方式制成成品。 [0010] Step 4 cut type: the sealing gasket after drying semifinished Further, according to the actual requirements of the drawing process, laser cutting, stamping into finished processing methods.

[0011] 本发明的有益效果是:本发明中的陶瓷纤维密封衬垫,使用化学处理后的陶瓷纤维与未经化学处理的陶瓷纤维的混合物作为密封衬垫的骨架材料,与同类产品相比具有更强的机械耐久性能和耐吹蚀性能,且具有原材料成本低的优点。 [0011] Advantageous effects of the present invention are: ceramic fiber in the sealing liner of the present invention, the ceramic fiber after chemical treatment using the mixture of ceramic fibers without chemical treatment of the reinforcing material as a sealing gasket, compared with similar products having stronger mechanical durability and resistance to wind erosion properties, and have the advantage of lower raw material costs. 使用新型湿法抄网工艺步骤,不仅使膨胀材料更均匀的分布在无机纤维骨架中,也提高了密封衬垫整体成型的均匀度。 A wet process steps using the new landing net, expanded material not only more uniform distribution of the inorganic fibers in the backbone, but also to improve the uniformity of the integrally formed sealing gasket.

具体实施方式 detailed description

[0012] [0012]

具体实施方式一:本实施方式以下结合具体实施例对本发明做进一步描述和说明。 DETAILED DESCRIPTION a: the present embodiment described below with reference to specific embodiments of the present invention will be further described and illustrated.

[0013] 所述衬垫由硅烷偶联剂处理后的陶瓷纤维,未经化学处理的陶瓷纤维,膨胀材料, 粘合剂、填料和添加剂制成,其中硅烷偶联剂处理后的陶瓷纤维的重量份数为O~99,未经化学处理的陶瓷纤维的重量份数为O~99,膨胀材料的重量份数为O~60,粘合剂的重量份数为1~15,填料的重量份数为0~5,添加剂的重量份数为0~5。 [0013] The ceramic fiber pad the silane coupling agent treatment, without the chemically treated ceramic fibers, intumescent material, a binder, a filler and an additive made, silane coupling agent treatment in which the ceramic fibers parts by weight of O ~ 99, parts by weight of ceramic fibers without chemical treatment is O ~ 99, parts by weight of the expandable material is O ~ 60, parts by weight of the binder is 1 to 15, the weight of the filler 0 to 5 parts, parts by weight of additives from 0 to 5.

[0014]膨胀材料包括未膨胀蛭石、可膨胀石墨或上述二者的混合物。 [0014] The intumescent material comprises unexpanded vermiculite, expandable graphite or a mixture of the two.

[0015]粘合剂包括有机粘合剂和无机粘合剂,其中有机粘合剂包括改性淀粉、羧甲基纤维素钠、乙酸乙酯胶乳、丙烯酸胶乳、天然橡胶胶乳、丁苯胶乳和甲基丙烯酸酯胶乳,无机粘合剂包括硅酸钠、钠基膨润土、钙基膨润土、硅溶胶、铝溶胶、黏土或上述一种或多种成分的组合。 [0015] binder comprising an organic binder and an inorganic binder, wherein the organic binder comprises a modified starch, sodium carboxymethyl cellulose, ethyl acetate latex, acrylic latex, natural rubber latex, styrene butadiene latex, and methacrylate latex, an inorganic binder composition comprising sodium silicate, sodium bentonite, calcium bentonite, silica sol, alumina sol, clay, or one or more of the above ingredients.

[0016]填料包括空心玻璃微珠、膨胀后蛭石、云母、珍珠岩或上述一种或多种成分的组合。 [0016] The filler comprises hollow glass microspheres, vermiculite, mica, expanded perlite or a combination of the above-mentioned one or more ingredients.

[0017]添加剂包括表面活性剂、消泡剂、絮凝剂、分散剂或上述一种或多种成分的组合。 [0017] The additives include surface active agents, defoamers, flocculants, dispersants, or a combination of one or more of the ingredients.

[0018]具体实施方式二、硅烷偶联剂处理后的陶瓷纤维按如下步骤制成:步骤一、将硅烷偶联剂配成0. 5~1%浓度的稀溶液;步骤二将待处理的陶瓷纤维浸渍在步骤一中的稀溶液中,时间为5~30分钟;步骤三、取出后在80~150°C下烘干备用。 [0018] DETAILED DESCRIPTION Second, the silane coupling agent-treated ceramic fibers are made as follows: Step 1, a dilute solution of a silane coupling agent dubbed 0.5 to 1% concentration; step two will be treated ceramic fibers immersed in a dilute solution of the step, the time is 5 to 30 min; step three, after removal standby dried at 80 ~ 150 ° C.

[0019]具体实施方式三、所述方法包括如下步骤:步骤一、配浆:将定量的化学处理后的陶瓷纤维、未经化学处理的陶瓷纤维、膨胀材料、填料加入水中,加入分散剂,配成纤维浓度为3~6%的混合物,再加入消泡剂后,施加高速搅拌对浆料中的固体加以分散使其分布均匀,分散时间为2~30分钟,然后依次添加粘合剂和表面活性剂,在持续的低速搅拌下加入絮凝剂,使浆料中的纤维絮凝成团,膨胀材料与填料被包裹在纤维絮团中。 [0019] Third, specific embodiments the method includes the following steps: Step 1, with slurry: The amount of ceramic fibers after the chemical treatment without chemical treatment of ceramic fibers, intumescent material, a filler added to the water, addition of a dispersant, dubbed fiber concentration of 3 to 6% of the mixture, after the addition of an antifoaming agent, is applied to the high-speed agitation to be dispersed solids in the slurry to be distributed uniformly, the dispersion time of 2 to 30 minutes, followed by adding a binder and a surfactant, a flocculating agent is added under continuous stirring at low speed, the fiber slurry flocculating into groups, the expansion of the filler material is wrapped in a fiber floc. 膨胀材料和填料也可以在纤维絮凝之后再加入; Intumescent material and filler may be added after the fiber flocculation;

[0020] 步骤二、抄网成型:将配好的浆料注入放置在真空箱内渗透性丝网之上的成型模具中,静置1-20秒,使浆料中各个纤维絮团之间充分交织,真空度为0. 05~0.IMPa,使用压辊压制衬垫湿坯,除去模具,使用抄板将衬垫湿坯从渗透性丝网上取下; [0020] Step two, dip net molding: injection with a good slurry was placed over a vacuum chamber mesh permeable forming mold and allowed to stand 1-20 seconds to allow the slurry between the individual fibers floc full interleaving, the degree of vacuum of 0. 05 ~ 0.IMPa, liner using a press roller pressing the wet preform, the mold is removed using a wet copy board blank is removed from the pad permeable wire mesh;

[0021] 步骤三、干燥:干燥方法为对流干燥或微波干燥或两者的结合;当仅使用对流干燥时,热干空气温度控制在60~120°C,干燥时间为1~12小时;当仅使用微波干燥时,微波频率在2450兆赫干燥时间为0. 5~2小时;当对流干燥和微波干燥结合使用时,先利用对流干燥除去密封衬垫中的水分,再使用微波干燥重点对衬垫中心进行加热干燥,除去剩余的水分; [0021] Step three, drying: convective drying method is drying or microwave drying, or a combination of both; when only convection drying, hot dry air temperature was controlled at 60 ~ 120 ° C, the drying time is 1 to 12 hours; when when using only microwave drying, microwave frequency 2450 MHz the drying time is 0.5 to 2 hours; when convection drying and microwave drying used in combination, the first convection drying to remove water using a sealing gasket, and then dried using a microwave focused on the liner center of the pad is heated and dried to remove excess moisture;

[0022] 步骤四、切割成型:将干燥后的密封衬垫半成品进一步,按照实际要求的加工图纸,使用激光切割、冲压成型的加工方式制成成品。 [0022] Step 4 cut type: the sealing gasket after drying semifinished Further, according to the actual requirements of the drawing process, laser cutting, stamping into finished processing methods.

[0023]具体实施方式四、化学处理陶瓷纤维的步骤如下:称取100g陶瓷纤维,其中含量Al2O3为55%,SiO2和Al203含量为"%,纤维直径为5~ 8ym,纤维长度为1~2〇mm,使用除渣工艺除去陶瓷纤维中的渣球,至渣球含量低于5%质量分数。 [0023] DETAILED DESCRIPTION four chemical steps treated ceramic fibers is as follows: Weigh 100g of ceramic fibers, wherein the content of Al2O3 is 55%, SiO2 and Al203 content of "%, a fiber diameter of 5 ~ 8ym, a fiber length of 1 to 2 〇mm, deglaze process is removed using the ceramic fibers of shot, the shot content to less than 5% by mass fraction.

[0024]在2000ml水中加入50g氨丙基三乙氧基硅烷(KH-550)溶液,搅拌水解10分钟。 [0024] Add 50g in 2000ml water aminopropyl triethoxysilane (KH-550) was stirred hydrolysis for 10 min. 将上述陶瓷纤维全部进入硅烷偶联剂的水解液中,浸渍10分钟后取出,过滤,在80°C烘箱中烘干备用。 The above-mentioned ceramic fibers into the entire hydrolyzate of the silane coupling agent, was immersed for 10 minutes removed, filtered and dried at 80 ° C standby oven.

[0025]制备衬垫的方法如下:步骤一、配浆:称量经过化学处理的陶瓷纤维1830g、未改性的未膨胀蛭石2030g,一同加入80升水中,加入50ml浓硫酸(98%)作分散剂,20ml非离子型消泡剂,使用涡轮搅拌器以200转/分钟的转速分散5分钟。 [0025] The process for preparing cushion follows: Step 1, with pulp: After weighing 1830g ceramic fibers chemically treated, unmodified unexpanded vermiculite 2030g, was added with 80 l of water, was added 50ml of concentrated sulfuric acid (98%) as dispersants, 20ml nonionic defoamer, dispersion using a turbine stirrer at 200 r / min speed for 5 minutes. 继续加入150g乙酸乙酯胶乳、50g硅酸钠为粘合剂,20ml非离子型表面活性剂。 150g latex was further added ethyl acetate, 50g sodium silicate binder, 20ml nonionic surfactant. 降低搅拌速度至60转/分钟,加入50g聚合氯化错进行絮凝; Reducing the stirring speed to 60 rev / min, the polymerization was added 50g wrong chlorination for flocculation;

[0026] 步骤二、抄网成型:将配好的浆料注入尺寸为ImXImX6mm的模具,静置10秒后, 利用真空箱以〇.IMPa的真空度抽真空20秒成型。 [0026] Step two, dip net molding: with a good size ImXImX6mm slurry injection mold, after standing for 10 seconds, using the degree of vacuum of the vacuum tank is evacuated 〇.IMPa molding 20 seconds. 使用两道连续的压辊压制湿坯两次,压辊高度为6mm。 Using two successive press roll pressing the two wet blank, the height of the pressure roller of 6mm. 除去模具,使用抄板将衬垫湿坯取下。 The mold is removed using a wet pad blank copy plate removed.

[0027] 步骤三、干燥:使用120°C的热干空气对衬垫湿坯进行对流干燥。 [0027] Step three, drying: heat to 120 ° C using dry air to the wet pad blank convective drying. 干燥时间为2小时。 The drying time was 2 hours.

[0028] 步骤四、切割:使用数控激光切割机,将衬垫加工为所需形状的成品。 [0028] Step 4 Cutting: numerically controlled laser cutting machine, processed into the finished gasket of the desired shape. 制成的衬垫的密度为4110g/m2。 The density of the pad is made of 4110g / m2.

具体实施方式[0029] 五、化学处理陶瓷纤维的步骤如下:称取100g陶瓷纤维,其中含量Al2O3为55%,SiO2和Al203含量为"%,纤维直径为5~ 8ym,纤维长度为1~2〇mm,使用除渣工艺除去陶瓷纤维中的渣球,至渣球含量低于5%质量分数。 DETAILED DESCRIPTION [0029] Fifth, the chemical processing of step ceramic fibers is as follows: Weigh 100g of ceramic fibers, wherein the content of Al2O3 is 55%, SiO2 and Al203 content of "%, a fiber diameter of 5 ~ 8ym, a fiber length of 1 to 2 〇mm, deglaze process is removed using the ceramic fibers of shot, the shot content to less than 5% by mass fraction.

[0030] 在2000ml水中加入50g氨丙基三乙氧基硅烷(KH-550)溶液,搅拌水解10分钟。 [0030] Add 50g in 2000ml water aminopropyl triethoxysilane (KH-550) was stirred hydrolysis for 10 min. 将上述陶瓷纤维全部进入硅烷偶联剂的水解液中,浸渍10分钟后取出,过滤,在80°C烘箱中烘干备用。 The above-mentioned ceramic fibers into the entire hydrolyzate of the silane coupling agent, was immersed for 10 minutes removed, filtered and dried at 80 ° C standby oven.

[0031] 称量未经化学处理的陶瓷纤维930g、经过化学处理的陶瓷纤维930g、未改性的未膨胀蛭石2000g,一同加入80升水中,加入50ml浓硫酸(98% )作分散剂,20ml非离子型消泡剂,使用涡轮搅拌器以180转/分钟的转速分散5分钟。 [0031] Weigh 930g of ceramic fibers chemically untreated, after chemical treatment of ceramic fibers 930g, unmodified unexpanded vermiculite 2000g, was added with 80 l of water, was added 50ml of concentrated sulfuric acid (98%) as a dispersing agent, 20ml nonionic defoamer, dispersion using a turbine stirrer at 180 r / min speed for 5 minutes. 继续加入180g改性淀粉、50g 硅酸钠为粘合剂,20ml非离子型表面活性剂。 Modified starch further added 180g, 50g of sodium silicate adhesive, 20ml nonionic surfactant. 降低搅拌速度至60转/分钟,加入50g聚合氯化错进行絮凝。 Reducing the stirring speed to 60 rev / min, the polymerization was added 50g wrong chlorination for flocculation.

[0032] 之后的制备流程与具体实施方式四相同。 After the same procedure was prepared [0032] with the four specific embodiments. 制成的衬垫的密度为4070g/m2。 The density of the pad is made of 4070g / m2.

具体实施方式[0033] 六、化学处理陶瓷纤维的步骤如下:称取100g陶瓷纤维,其中含量Al2O3为55%,SiO2和Al203含量为"%,纤维直径为5~ 8ym,纤维长度为1~2〇mm,使用除渣工艺除去陶瓷纤维中的渣球,至渣球含量低于5%质量分数。 DETAILED DESCRIPTION [0033] Sixth, the chemical processing of step ceramic fibers is as follows: Weigh 100g of ceramic fibers, wherein the content of Al2O3 is 55%, SiO2 and Al203 content of "%, a fiber diameter of 5 ~ 8ym, a fiber length of 1 to 2 〇mm, deglaze process is removed using the ceramic fibers of shot, the shot content to less than 5% by mass fraction.

[0034] 在2000ml水中加入50g氨丙基三乙氧基硅烷(KH-550)溶液,搅拌水解10分钟。 [0034] Add 50g in 2000ml water aminopropyl triethoxysilane (KH-550) was stirred hydrolysis for 10 min. 将上述陶瓷纤维全部进入硅烷偶联剂的水解液中,浸渍10分钟后取出,过滤,在80°C烘箱中烘干备用。 The above-mentioned ceramic fibers into the entire hydrolyzate of the silane coupling agent, was immersed for 10 minutes removed, filtered and dried at 80 ° C standby oven.

[0035] 称量未经化学处理的陶瓷纤维1850g、未改性的未膨胀蛭石2000g,一同加入80升水中,加入50ml浓硫酸(98% )作分散剂,20ml非离子型消泡剂,使用涡轮搅拌器以200转/分钟的转速分散10分钟。 [0035] The weighing 1850g ceramic fibers chemically untreated, unmodified unexpanded vermiculite 2000g, was added with 80 l of water, was added 50ml of concentrated sulfuric acid (98%) as a dispersant, 20ml nonionic defoamer, using a turbine stirrer at 200 revolutions / minute speed dispersed for 10 minutes. 继续加入250g羧甲基纤维素钠为粘合剂,20ml非离子型表面活性剂。 Further added 250g sodium carboxymethyl cellulose as a binder, 20ml nonionic surfactant. 降低搅拌速度至60转/分钟,加入50g聚合硫酸铝进行絮凝。 Reducing the stirring speed to 60 rev / min, 50g polyaluminum sulfate flocculation.

[0036] 之后的制备流程与具体实施方式四相同。 After the same procedure was prepared [0036] with the four specific embodiments. 制成的衬垫的密度为4090g/m2。 The density of the pad is made of 4090g / m2.

[0037] 对比例一: [0037] Comparative Example a:

[0038] 对比例1中的密封衬垫购自美国某公司,型号为Interam™ 100,其厚度为6. 05mm, 面密度为4100g/mm2。 [0038] The sealing liner of Comparative Example 1 was purchased from a company, model Interam ™ 100, a thickness of 6. 05mm, the surface density of 4100g / mm2.

[0039] 对具体实施方式四至六(分别定义为A、B、C号)和对比例1统一在同样条件下进行产品一致性分析,其结果见表1。 [0039] The specific embodiments four to six (defined as A, B, C number) and unified Comparative Example 1 under the same conditions for product consistency analysis results shown in Table 1.

[0040] 表1 [0040] TABLE 1

[0041] [0041]

Figure CN104727903AD00071

[0043] 对具体实施方式四至六和对比例1统一在同样条件下进行机械耐久性分析,其结果见表2。 [0043] The specific embodiments and unified mechanical durability Comparative Example 1 under the same conditions analyzed four to six, and the results are shown in Table 2.

[0044] 表2 [0044] TABLE 2

[0045] [0045]

Figure CN104727903AD00081

具体实施方式[0047] 四至六和对比例1统一在同样条件下进行耐吹蚀性能测试,其结果见表3。 DETAILED DESCRIPTION [0047] The fourth to sixth unified and Comparative Example 1 Test for resistance to wind erosion performance under the same conditions, the results shown in Table 3.

[0048]表3 [0048] TABLE 3

[0049] [0049]

Figure CN104727903AD00091

[0050] 通过表1所述一致性对比可知,使用本发明方法进行的实施例四至六中所述的密封衬垫产品在整体材料的均匀度上要优于对比例1 ;实施例四、五与对比例1相比膨胀材料分散情况更好,实施例六与对比例1相比,膨胀材料分散情况非常接近。 Sealing liner Products [0050] Table 1 by comparison apparent consistency, four to six cases in the embodiment of the present invention using the method in the whole of the material to be uniformly superior to Comparative Example 1; Example four, five Comparative Example 1 as compared with the better dispersion of the expandable material, according to a sixth compared to Comparative Example 1, the dispersion of the expandable material is very close to the embodiment. 可见,使用新型湿法抄网工艺生产密封衬垫,可以保证产品具有很高的均匀度水平。 Visible, using the new process for producing a wet dip nets sealing gasket, to ensure that the product can have a high level of uniformity.

[0051] 通过表2所述的机械耐久性分析可知:在经过19次循环后,实施例四中密封衬垫的膨胀力残留值大于对比例1中密封衬垫,说明其机械耐久性更好;实施例五中密封衬垫的膨胀力残留值小于实施例四与对比例1中所述密封衬垫,说明其机械耐久性略差,但与对比例1中所述衬垫的机械耐久性相差不远;实施例六中密封衬垫的膨胀力残留值最小, 说明其机械耐久性要劣于实施例四、五和对比例1中所述密封衬垫。 [0051] The mechanical durability of the table by 2 analysis shows: After 19 cycles, according to a fourth embodiment of the expansion force is greater than the remaining value of the sealing gasket sealing liner in Comparative Example 1, a better mechanical durability ; expansion force of the fifth embodiment of the sealing liner and the residual value is less than four of the seal gasket of Comparative Example 1, indicating that slightly worse mechanical durability, in Comparative Example 1 but the mechanical durability of the gasket far off; the residual value of the expansion force of the Sixth Example embodiment minimum sealing gasket, which illustrate the mechanical durability inferior to four, five, and the sealing liner in Comparative Example 1. 可见,使用硅烷偶联剂对密封衬垫的陶瓷纤维原料进行化学处理,可以增强其机械耐久性,并达到先进水平。 Visible, a silane coupling agent of a ceramic fiber material sealing gasket chemical treatment, mechanical durability can be enhanced, and advanced level.

[0052]通过表3所述的腐蚀率数据可知,实施例四所述密封衬垫的耐吹蚀性能最优,对比例1所述密封衬垫次之,实施例五所述密封衬垫再次,但与对比例1相差不大,最差的是实施例六中所述密封衬垫。 [0052] By etching rate of the data according to Table 3 that the wind erosion resistance performance of the four sealing liner optimal Example, Comparative Example 1, followed by sealing gasket, sealing gasket described in five cases again but little difference with Comparative Example 1, the worst is according to a sixth embodiment of the sealing gasket. 可见,使用硅烷偶联剂对密封衬垫的陶瓷纤维原料进行化学处理,可以增强其耐吹蚀性能,并达到先进水平。 Visible, a silane coupling agent of a ceramic fiber material sealing gasket chemical treatment, which can enhance resistance to wind erosion performance and advanced level.

[0053]测试方法依据如下: [0053] based on the following test methods:

[0054]产品一致性分析 [0054] Product Consistency

[0055]该测试测量密封衬垫成品各部分密度及成分的均匀性。 [0055] This test measures the uniformity of the sealing liner and the density of each part of the finished component. 使用数控激光切割机从密封衬垫成品各个部位随机取样20个并编号,样品大小为20X20mm。 Use CNC laser cutting machine from all parts of the finished sealing gasket 20 and a random sample number, the sample size is 20X20mm. 使用精度为0.OOOlg的分析天平对样品称重并记录。 Using the precision analytical balance 0.OOOlg of sample was weighed and recorded. 将全部样品置于马弗炉中在750°C下热处理2小时以除去粘合剂,使用乙醇分散后,利用沉降速度差使纤维与膨胀材料分离。 All samples were heat treated in a muffle furnace for 2 hours to remove the binder, the dispersant with ethanol, separated from the fibers using a sedimentation rate errand swellable material at 750 ° C. 膨胀材料干燥后称重并记录。 Expandable material after drying weighed and recorded. 分别计算样品总重量、样品所含膨胀材料重量的均值和方差。 Calculate the total weight of the sample contained in the sample mean and variance of the weight of the expanded material.

[0056]机械耐久性分析 [0056] Durability Mechanical Analysis

[0057]该测试用以测定间隙变化对密封衬垫所能提供的膨胀力的影响,可以提供密封衬垫机械耐久性能的比较性数据。 [0057] The test used to determine the effect of an expansion force on the gap variation can provide a sealing gasket, mechanical durability may be provided a sealing gasket capable of comparative data. 使用激光切割密封衬垫样品至20X20mm,放入马弗炉中在750°C下热处理2小时以除去粘合剂。 Laser cutting the sealing gasket samples to 20X20mm, placed in a muffle furnace and heat treated at 750 ° C 2 hours to remove the binder. 自然冷却后将样品转移至电子压力测试机上。 After naturally cooling the sample to an electronic pressure testing machine. 以0.Imm/秒的速度压缩样品至其在污染物控制单元中实际安装的间隙(本文中所涉及的密封衬垫为4_)后,静止15秒,读取衬垫样品此时的膨胀力数据,之后以0.Imm/秒的速度释放样品至不受压力的自由状态,记为一次循环。 A speed 0.Imm / sec to compress the sample in the gap to its actual installation unit (the sealing gasket is herein involved 4_) contamination control, rest for 15 seconds, the sample is read at this time is the expansion force of the pad data, then at a speed of 0.Imm / sec to release the sample from the free state of pressure, referred to as a cycle. 按上述步骤进行20次压缩-释放循环,记录并整理每次循环对应的密封衬垫膨胀力数据。 20 times as described in step compression - release cycle, recorded and analyzed sealing liner expansion force data corresponding to each cycle.

[0058]耐吹蚀性能测试 [0058] The wind erosion resistance performance test

[0059]该测试是在比污染物控制单元真实工作条件更严峻的条件下进行的加速老化测试,可以提供密封衬垫耐吹蚀性能的比较性数据。 [0059] The test was carried out under conditions of actual working unit contamination control than more severe accelerated aging test conditions, the sealing liner may be provided comparative data wind erosion resistance performance. 将密封样品衬垫安装在夹具中,安装间隙为该型号密封衬垫在污染物控制单元中实际的安装间隙(本文中所涉及的密封衬垫为4mm)或在该安装间隙基础上上下各浮动10%,加热至750°C并恒温2小时以除去粘合剂,然后暴露衬垫边缘于不断移动的常温气流中24小时,气流出口压力为0. 15MPa,之后停止吹蚀,测定样品质量损失。 The sealing gasket sample is mounted in a fixture, a sealing gasket is mounted in the gap for the model pollutant control installation gap (sealing gasket is herein involved 4mm) unit or the actual upper and lower float mounting gap on the basis of the 10%, was heated to 750 ° C and kept constant for 2 hours to remove the binder, then the edge of the pad is exposed to the gas flow at room temperature for 24 hours constantly moving, airflow outlet pressure of 0. 15MPa, after stopping the wind erosion, loss of mass measurement sample .

Claims (7)

  1. 1. 一种陶瓷纤维密封衬垫,其特征在于:所述衬垫由硅烷偶联剂处理后的陶瓷纤维, 未经化学处理的陶瓷纤维,膨胀材料,粘合剂、填料和添加剂制成,其中硅烷偶联剂处理后的陶瓷纤维的重量份数为O~99,未经化学处理的陶瓷纤维的重量份数为O~99,膨胀材料的重量份数为〇~60,粘合剂的重量份数为1~15,填料的重量份数为O~5,添加剂的重量份数为〇~5。 A ceramic fiber sealing gasket, characterized in that: said ceramic fiber pad the silane coupling agent treatment, made without chemically treated ceramic fibers, intumescent material, a binder, fillers and additives, wherein the parts by weight of ceramic fiber after the silane coupling agent is O ~ 99, parts by weight of ceramic fiber is chemically untreated O ~ 99, parts by weight of the expandable material is square to 60, a binder 1 to 15 parts by weight, the parts by weight of the filler is O to 5, parts by weight of additive to 5 billion.
  2. 2. 根据权利要求1所述一种陶瓷纤维密封衬垫,其特征在于硅烷偶联剂处理后的陶瓷纤维按如下步骤制成:步骤一、将硅烷偶联剂配成0. 5~1%浓度的稀溶液;步骤二将待处理的陶瓷纤维浸渍在步骤一中的稀溶液中,时间为5~30分钟;步骤三、取出后在80~ 150°C下烘干备用。 2. A ceramic fiber according to the sealing liner as claimed in claim, wherein the silane coupling agent-treated ceramic fibers are made as follows: Step 1, a silane coupling agent formulated as 0.5 to 1% dilute solution concentration; two step dipping the ceramic fibers to be treated in step is a dilute solution, for 5 to 30 min; step three, after removal standby dried at 80 ~ 150 ° C.
  3. 3. 根据权利要求1所述一种陶瓷纤维密封衬垫,其特征在于膨胀材料包括未膨胀蛭石、可膨胀石墨或上述二者的混合物。 According to claim 1. A ceramic fiber sealing gasket, characterized in that the intumescent material comprises unexpanded vermiculite, expandable graphite or a mixture of both of the above.
  4. 4. 根据权利要求1所述一种陶瓷纤维密封衬垫,其特征在于粘合剂包括有机粘合剂和无机粘合剂,其中有机粘合剂包括改性淀粉、羧甲基纤维素钠、乙酸乙酯胶乳、丙烯酸胶乳、 天然橡胶胶乳、丁苯胶乳和甲基丙烯酸酯胶乳,无机粘合剂包括硅酸钠、钠基膨润土、钙基膨润土、硅溶胶、铝溶胶、黏土或上述一种或多种成分的组合。 According to claim 1. A ceramic fiber sealing gasket, wherein the binder comprises an organic binder and an inorganic binder, wherein the organic binder comprises a modified starch, sodium carboxymethyl cellulose, ethyl acetate latex, acrylic latex, natural rubber latex, SBR latex and methacrylates, the inorganic binder comprises sodium silicate, sodium bentonite, calcium bentonite, silica sol, alumina sol, clay, or one of the above or a combination of multiple ingredients.
  5. 5. 根据权利要求1所述一种陶瓷纤维密封衬垫,其特征在于填料包括空心玻璃微珠、 膨胀后蛭石、云母、珍珠岩或上述一种或多种成分的组合。 According to claim 1. A ceramic fiber sealing gasket, characterized in that the filler comprises hollow glass microspheres, composition vermiculite, mica, perlite or said one or more components of the expansion.
  6. 6. 根据权利要求1所述一种陶瓷纤维密封衬垫,其特征在于添加剂包括表面活性剂、 消泡剂、絮凝剂、分散剂或上述一种或多种成分的组合。 According to claim 1. A ceramic fiber sealing gasket, characterized in that the additive comprises a combination of surfactants, defoamers, flocculants, dispersants, or said one or more ingredients.
  7. 7. -种权利要求1所述陶瓷纤维密封衬垫的制备方法,其特征在于:所述方法包括如下步骤:步骤一、配浆:将定量的化学处理后的陶瓷纤维、未经化学处理的陶瓷纤维、膨胀材料、填料加入水中,加入分散剂,配成纤维浓度为3~6 %的混合物,再加入消泡剂后,施加高速搅拌对浆料中的固体加以分散使其分布均匀,分散时间为2~30分钟,然后依次添加粘合剂和表面活性剂,在持续的低速搅拌下加入絮凝剂,使浆料中的纤维絮凝成团,膨胀材料与填料被包裹在纤维絮团中。 7. - The method for preparing a ceramic fiber sealing gasket as claimed in claim seed, characterized in that: said method comprises the following steps: a step, with slurry: The amount of the chemical treatment of ceramic fibers, chemically untreated ceramic fibers, the expandable material, a filler added to the water, dispersant, 3% to 6% of a fiber concentration of formulated mixture, then add an antifoaming agent, is applied to the high-speed stirring dispersion of solids in the slurry be distributed evenly dispersed for 2 to 30 minutes, followed by adding a binder and a surfactant, a flocculating agent is added in a continuous low speed agitation, the fibers agglomerate flocculated slurry, expandable filler material is wrapped in a fiber floc. 膨胀材料和填料也可以在纤维絮凝之后再加入; 步骤二、抄网成型:将配好的浆料注入放置在真空箱内渗透性丝网之上的成型模具中, 静置1-20秒,使浆料中各个纤维絮团之间充分交织,真空度为0. 05~0.IMPa,使用压辊压制衬垫湿坯,除去模具,使用抄板将衬垫湿坯从渗透性丝网上取下; 步骤三、干燥:干燥方法为对流干燥或微波干燥或两者的结合;当仅使用对流干燥时, 热干空气温度控制在60~120°C,干燥时间为1~12小时;当仅使用微波干燥时,微波频率在2450兆赫干燥时间为0. 5~2小时;当对流干燥和微波干燥结合使用时,先利用对流干燥除去密封衬垫中的水分,再使用微波干燥重点对衬垫中心进行加热干燥,除去剩余的水分; 步骤四、切割成型:将干燥后的密封衬垫半成品进一步,按照实际要求的加工图纸,使用激光切割、冲压成型的加工方式制 Intumescent material and filler may be added after the fiber flocculation; step two, dip net molding: injection with a good slurry was placed over a vacuum chamber mesh permeable forming mold and allowed to stand 1-20 seconds, so that between the individual fibers in the slurry sufficiently floc interleaving, the degree of vacuum of 0. 05 ~ 0.IMPa, liner using a press roller pressing the wet preform, the mold is removed using a wet copy board blank taken from the pad permeable wire mesh under; step three, drying: convective drying method is drying or microwave drying, or a combination of both; when only convection drying, hot dry air temperature was controlled at 60 ~ 120 ° C, the drying time is 1 to 12 hours; when only the when using the microwave drying, microwave frequency 2450 MHz the drying time is 0.5 to 2 hours; when convection drying and microwave drying used in combination, the first convection drying to remove water using a sealing gasket, and then dried using a microwave focused on the pad central heating and drying to remove excess moisture; step 4 cut type: the sealing gasket further dried semi-finished product, according to the actual requirements of the drawing process, laser cutting, stamping processing methods prepared 成品。 Finished.
CN 201510043671 2015-01-22 2015-01-22 A ceramic fiber seal gasket and preparation method CN104727903B (en)

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