CN103342984A - Yellow flexible sealing filler and preparation method thereof - Google Patents
Yellow flexible sealing filler and preparation method thereof Download PDFInfo
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- CN103342984A CN103342984A CN2013103127457A CN201310312745A CN103342984A CN 103342984 A CN103342984 A CN 103342984A CN 2013103127457 A CN2013103127457 A CN 2013103127457A CN 201310312745 A CN201310312745 A CN 201310312745A CN 103342984 A CN103342984 A CN 103342984A
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Abstract
The invention relates to a yellow flexible sealing filler and a preparation method thereof. The yellow flexible sealing filler is prepared from 12-18wt% of PTFE (polytetrafluoroethylene) fiber, 45-50wt% of Kelvar fiber, 22-30wt% of lubricating agent, 5-10wt% of natural rubber and 2-4wt% of calcium carbonate, wherein the lubricating agent is prepared from high-temperature silicone oil and Vaseline in a mass ratio of 10:3. The preparation method is characterized by grinding the PTFE fiber, Kelvar fiber, natural rubber and calcium carbonate in a grinder, putting the obtained powder mixture into a constant-temperature heating container, stirring the powder mixture with stirring equipment, adding the lubricating agent and continuing stirring after the powder mixture is uniformly mixed by stirring, always keeping the container at a constant temperature of 90-180 DEG C in the stirring process and continuing stirring until a pulpy product is finally formed. The yellow flexible sealing filler has good electrical insulating property and chemical resistance, strong plasticity, outstanding tensile strength, wear resistance and anti-cracking and anti-corrosion properties and high resilience, and can be used for sealing valves and pumps in the fields such as water treatment, papermaking, medicaments and the like.
Description
Technical field
The present invention relates to a kind of lock packing, be specifically related to a kind of yellow flexible gasket and preparation method thereof.
Background technology
The quality of valve or pump meets the requirement of operating mode medium except valve or pump adopt material and structure, and the selection of sealed structure and form is also most important.The choose reasonable of sealed structure and form be guarantee to produce normally carry out in an orderly manner, reduce maintenance and maintenance cost, alleviate engineering labour intensity, reduce the material waste, avoid the key of environmental pollution.
At present, at different operating modes and medium, and user's requirement different to sealing property, encapsulation scheme can be divided into packing_seal, mechanical seal, flexible filler sealing.Wherein packing_seal reaches sealing effectiveness by winding, and sealing mode cheapness, installation are changed simple and convenient, but because it is fashion of extrusion, be prone to and leak even because leakage pollutes, axle easy to wear, power consumption water consumption, life-span is short, the stock who causes multiple class in addition easily; Mechanical seal is that rotating ring adds neck ring and adds " O " type circle sealing, and this mode spillage is few, the life-span long, do not damage axle, power consumption is low, changes trouble but install, in case damage, leaks and is difficult to control, and in addition, big specification can't be made, and is expensive; The flexible filler sealing is a kind of new sealing means; its advantage is that other sealing means are incomparable; as: use rationally can reach complete leak free effect; energy-saving and water-saving; can use repeatedly, simultaneously, convenient for installation and maintenance, can not shut down on-line maintenance, axle is not had wearing and tearing, not limited by specification; but the sealing mode is not suitable for the environment of High Temperature High Pressure, is prone to the phenomenon of infiltration under the situation of termination of pumping yet.
Flexible gasket, be commonly called as the wadding of mud shape, it is a kind of lock packing of new no asbestos synthesis of polymer material, outward appearance such as clay shape have special plasticity-, forms slide block cylindraceous after can be in filler is contained living filler by two ends packing ring seal, and the extremely thin liquid film of generation between the relative movement face of axle, formation " bearing effect " and " labyrinth effect ", because the effect of the exotic materials of flexible filler, the heat of friction of generation is close to zero.Therefore flexible gasket is to produce one of minimum filler of friction resistance in the world, and the effect of polymer barrier agent has guaranteed the few or ne-leakage of spillage between the medium between the filler.Therefore, flexible gasket is unique a kind of plastic, low filler that rubs sassafras and do not need water coolant to wash.
All there is following problem in the flexible gasket that occurs at present: many comprise a kind of filamentary material in the flexible gasket, and fibre strength influences its stretch-proof ability inadequately; Rebound resilience is poor, and descending because of the sealing property that seal shaft out of roundness and beat cause appears in the stress relaxation that the loss of influence compensation solid volume causes; No filler effect of anti-cracking can't guarantee the filler appropriateness, can cause that filling surface is chapped or the packing hardening phenomenon; Poor and the filler contact part of rust-proof effect mostly is metal covering, and the phenomenon of getting rusty appears in use unavoidably for a long time.
Summary of the invention
Technical problem to be solved by this invention is to provide at above-mentioned prior art that a kind of tension is wear-resisting, anticracking is antirust, have high resilience can yellow flexible gasket.
The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of yellow flexible gasket is made up of 12～18wt%PTFE fiber, 45～50wt%Kelvar fiber, 22～30wt% lubricant, 5～10wt% natural rubber, 2～4wt% calcium carbonate.
As improvement, described lubricant comprises high-temperature silicon oil and Vaseline, and the mass ratio of high-temperature silicon oil and Vaseline is 10:3.
The preparation method of above-mentioned yellow flexible gasket is: PTFE fiber, Kelvar fiber, natural rubber and calcium carbonate are pulverized in pulverizer, the mixed powder that obtains is positioned in the thermostatically heating container, use whipping device to stir, when stir action be accomplished to mixed powder is evenly mixed after, adding lubricant continues to stir, whipping process keeps thermostatically heating container constant temperature, and temperature remains between 90～180 degree, stirs the last mud shape product that forms until finishing
Compared with prior art, the invention has the advantages that:
(1), adopted two kinds of filamentary material PTFE fibers and Kelvar fiber in this invention, the PTFE fiber has been raw material by tetrafluoroethylene, cutting or fibrillation through spinning or after making film and a kind of synthon of making; In the sixties in last century, du pont company is developed a kind of advanced composite material PPTA, and with " Kevlar " (Kevlar) as its trade mark, be a kind of aramid fiber composite material.PPTA is to belong to a kind of liquid crystals rodlike molecule, it has extraordinary thermostability, apyrous, anti-chemical, insulativity, and high strength and modulus, fibre strength can reach at least 2 times of like product, use with the PTFE blending in of fibers again, make the intensity of this yellow flexible gasket and stretch-proof ability increase greatly.
(2), adopted the natural rubber material, it is wear-resisting that it has good insulation performance, plasticity-, water proof trapping and tension, important increase should invention in the elasticity of yellow flexible gasket, make it have outstanding resilience.
(3), adopted calcium carbonate, calcium carbonate is as one of the weighting agent the most greatly of usage quantity in the rubber industry, can increase the volume of goods, and the natural rubber of conserve expensive, thereby reduce cost greatly, calcium carbonate and natural rubber are used in this yellow flexible gasket simultaneously, can obtain the tensile strength higher than gum sulfide, tear strength and wear resistance.
(4), the lubricant that adopts is made up of high-temperature silicon oil and Vaseline, high-temperature silicon oil has good thermotolerance, water tolerance, electrical insulating property and less surface tension, it is the only selection of lubricant in most flexible gasket, the Vaseline that increases has good moisture-keeping function, this yellow flexible gasket humidity of maintenance that can be intact, guarantee that its surface do not chap, simultaneously can also remedy the lock packing hardening phenomenon that calcium carbonate may bring, play complementary action, the rust-proof effect of Vaseline is outstanding in addition, and economical and practical, more can optimize the lubrication of yellow flexible gasket.
This yellow flexible gasket is wear-resisting with its outstanding tension, anticracking is antirust, has the high resilience energy, goes for multi-field valve such as water treatment, papermaking, medicament and the sealing of pump.
Embodiment
Describe in further detail below in conjunction with the present invention of embodiment.
Yellow flexible gasket is made up of PTFE fiber, Kelvar fiber, high-temperature silicon oil, Vaseline, natural rubber, calcium carbonate, and the weight ratio of each material is:
The preparation process of yellow flexible gasket is: PTFE fiber, Kelvar fiber, natural rubber and calcium carbonate are pulverized in pulverizer, the mixed powder that obtains is positioned in the thermostatically heating container, use whipping device to stir, when stir action be accomplished to mixed powder is evenly mixed after, adding lubricant continues to stir, whipping process need keep container constant temperature, and temperature remains between 90～180 degree, stirs the last mud shape product that forms until finishing.
High-temperature silicon oil in the present embodiment has better heat-resisting, water tolerance, electrical insulating property and less surface tension.And has colourless nonpoisonous and tasteless not volatile characteristic simultaneously.The Vaseline Carboxymethyl Chitin, the humidity of maintenance muddy packing that can be intact in product, guarantee that its surface do not chap, and Vaseline can play effects such as antirust, lubricated, and cheap, therefore in the muddy packing of present embodiment, add this composition, can remedy the muddy packing hardening phenomenon that calcium carbonate may bring, play complementary action, cost performance is very high.The Kelvar fiber has that thermostability is strong, apyrous, anti-chemical and insulativity, and this fibre strength can reach at least 2 times of like product, with the PTFE blending in of fibers, can remedy the characteristics of PTFE insufficient strength.Natural rubber elasticity height has good insulation performance, plasticity-, water proof trapping and tension wear-resisting.Calcium carbonate can increase the volume of goods, and the natural rubber of conserve expensive, thereby reduces cost greatly.Calcium carbonate is inserted in the rubber, can obtain the tensile strength higher than gum sulfide, tear strength and wear resistance.
Claims (3)
1. yellow flexible gasket, it is characterized in that: described yellow flexible gasket is made up of 12～18wt%PTFE fiber, 45～50wt%Kelvar fiber, 22～30wt% lubricant, 5～10wt% natural rubber, 2～4wt% calcium carbonate.
2. yellow flexible gasket according to claim 1, it is characterized in that: described lubricant comprises high-temperature silicon oil and Vaseline, the mass ratio of high-temperature silicon oil and Vaseline is 10:3.
3. the preparation method of a yellow flexible gasket as claimed in claim 1, it is characterized in that: PTFE fiber, Kelvar fiber, natural rubber and calcium carbonate are pulverized in pulverizer, the mixed powder that obtains is positioned in the thermostatically heating container, use whipping device to stir, when stir action be accomplished to mixed powder is evenly mixed after, adding lubricant continues to stir, whipping process keeps thermostatically heating container constant temperature, temperature remains between 90～180 degree, stirs the last mud shape product that forms until finishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312745.7A CN103342984B (en) | 2013-07-24 | 2013-07-24 | Yellow flexible sealing filler and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312745.7A CN103342984B (en) | 2013-07-24 | 2013-07-24 | Yellow flexible sealing filler and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103342984A true CN103342984A (en) | 2013-10-09 |
| CN103342984B CN103342984B (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310312745.7A Active CN103342984B (en) | 2013-07-24 | 2013-07-24 | Yellow flexible sealing filler and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111303835A (en) * | 2019-11-15 | 2020-06-19 | 中国石油化工股份有限公司 | Sealing packing |
| CN112625385A (en) * | 2020-12-24 | 2021-04-09 | 浙江国泰萧星密封材料股份有限公司 | Preparation method of clean type mud-shaped filler |
Citations (6)
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| JPH07179846A (en) * | 1993-12-24 | 1995-07-18 | Ntn Corp | Oil seal ring |
| EP0915274A1 (en) * | 1997-11-06 | 1999-05-12 | Stoplik Services (I) Pvt. Ltd | High performance packing ring |
| CN101481594A (en) * | 2009-01-16 | 2009-07-15 | 梅怀伦 | High temperature resistant nano sealing soft packing and preparation thereof |
| JP2010095578A (en) * | 2008-10-14 | 2010-04-30 | Nok Corp | Fluororubber composition, cross-linked fluororubber and method for producing the same |
| CN102678922A (en) * | 2012-05-31 | 2012-09-19 | 慈溪博格曼密封材料有限公司 | Fiber packing preparation method |
| CN102757607A (en) * | 2012-07-27 | 2012-10-31 | 山东凯特工业技术有限公司 | Fluorine-containing sealing wadding and preparation method thereof |
-
2013
- 2013-07-24 CN CN201310312745.7A patent/CN103342984B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07179846A (en) * | 1993-12-24 | 1995-07-18 | Ntn Corp | Oil seal ring |
| EP0915274A1 (en) * | 1997-11-06 | 1999-05-12 | Stoplik Services (I) Pvt. Ltd | High performance packing ring |
| JP2010095578A (en) * | 2008-10-14 | 2010-04-30 | Nok Corp | Fluororubber composition, cross-linked fluororubber and method for producing the same |
| CN101481594A (en) * | 2009-01-16 | 2009-07-15 | 梅怀伦 | High temperature resistant nano sealing soft packing and preparation thereof |
| CN102678922A (en) * | 2012-05-31 | 2012-09-19 | 慈溪博格曼密封材料有限公司 | Fiber packing preparation method |
| CN102757607A (en) * | 2012-07-27 | 2012-10-31 | 山东凯特工业技术有限公司 | Fluorine-containing sealing wadding and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111303835A (en) * | 2019-11-15 | 2020-06-19 | 中国石油化工股份有限公司 | Sealing packing |
| CN111303835B (en) * | 2019-11-15 | 2023-08-01 | 中国石油化工股份有限公司 | Sealing filler |
| CN112625385A (en) * | 2020-12-24 | 2021-04-09 | 浙江国泰萧星密封材料股份有限公司 | Preparation method of clean type mud-shaped filler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103342984B (en) | 2014-11-05 |
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