CN103342983B - White flexible sealing filler and preparation method thereof - Google Patents
White flexible sealing filler and preparation method thereof Download PDFInfo
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- CN103342983B CN103342983B CN201310312458.6A CN201310312458A CN103342983B CN 103342983 B CN103342983 B CN 103342983B CN 201310312458 A CN201310312458 A CN 201310312458A CN 103342983 B CN103342983 B CN 103342983B
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Abstract
The invention relates to a white flexible sealing filler and a preparation method thereof. The white flexible sealing filler is prepared from 42-48wt% of PTFE (polytetrafluoroethylene) fiber, 10-15wt% of Kelvar fiber, 28-32wt% of lubricating agent, 8-12wt% 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 5:1. 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 white 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 white 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, reduces maintenance cost, alleviate the labour intensity of engineering, the key that environmental pollution was wasted, avoided to minimizing material.
At present, for 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 is cheap, installation replacing is simple and convenient, but because it is fashion of extrusion, be prone to leakage and even because leaking, pollute, axle easy to wear, power consumption water consumption, life-span is short, easily causes in addition the stock of multiple types; Mechanical seal is that rotating ring adds neck ring and adds "O"-ring sealing, and which spillage is few, the life-span long, do not damage axle, power consumption is low, but install, changes trouble, once damage, leaks and is difficult to control, and in addition, large specification cannot be made, expensive; Flexible filler sealing is a kind of new sealing means; its advantage is that other sealing means are incomparable; as: rationally use can reach complete leak free effect; energy-saving and water-saving; can Reusability, meanwhile, convenient for installation and maintenance, can not shut down on-line maintenance, to axle without wearing and tearing, not limited by specification; but sealing mode is not suitable for the environment of High Temperature High Pressure, the in the situation that of termination of pumping, be also prone to the phenomenon of infiltration.
Flexible gasket, be commonly called as the wadding of mud shape, it is a kind of new lock packing without asbestos synthesis of polymer material, outward appearance has special plasticity-as clay shape, after can living filler by two ends packing ring seal in stuffing-box, form slide block cylindraceous, and produce very thin liquid film between the relative movement face of axle, form " bearing effect " and " labyrinth effect ", due to 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 in the world one of minimum filler of friction resistance, and between filler, the effect of polymer barrier agent has guaranteed the few or ne-leakage of spillage between medium.Therefore, flexible gasket is uniquely a kind ofly plasticly, low rub sassafras and do not need the filler of cooling water washing.
All there is following problem in the flexible gasket occurring at present: in flexible gasket, many comprise a kind of filamentary material, and fibre strength affects its stretch-proof ability not; Rebound resilience is poor, and because of the sealing property that seal shaft out of roundness and beat cause, declining appears in the stress relaxation that the solid VOLUME LOSS of impact compensation causes; Without filler effect of anti-cracking, cannot guarantee filler appropriateness, can cause that filling surface is chapped or packing hardening phenomenon; Rust-proof effect is poor, and filler contact part 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 a kind of tensile wear-resistant, anticracking antirust for above-mentioned prior art, have high resilience can white flexible gasket.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of white flexible gasket is comprised of 42～48wt%PTFE fiber, 10～15wt%Kevlar fiber, 28～32wt% lubricant, 8～13wt% 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 5:1.
Compared with prior art, the invention has the advantages that:
(1), adopted two kinds of filamentary material PTFE fibers and Kevlar fiber in this invention, 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 develops a kind of advanced composite material PPTA, and usings " Kevlar " (Kevlar) as its trade mark, is 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 PTFE blending in of fibers again, the intensity of this white flexible gasket and stretch-proof ability are increased greatly.
(2), adopted natural rubber material, it has good insulativity, plasticity-, water proof trapping and tensile wear-resistant, important increase the elasticity of white flexible gasket in this invention, 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 rubber industry, can increase the volume of goods, and save expensive natural rubber, thereby greatly reduce costs, calcium carbonate and natural rubber are used in this white flexible gasket simultaneously, can obtain the tensile strength higher than gum sulfide, tear strength and wear resistance.
(4), the lubricant adopting is comprised 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 increasing has good moisture-keeping function, this white flexible gasket humidity of maintenance that can be intact, guarantee that its surface do not chap, can also make up the lock packing hardening phenomenon that calcium carbonate may bring simultaneously, play complementary action, in addition the rust-proof effect of Vaseline is outstanding, and economical and practical, more can optimize the lubrication of white flexible gasket.
This white flexible gasket is antirust with its outstanding tensile wear-resistant, anticracking, has high resilience energy, goes for the multi-field valve such as water treatment, papermaking, medicament and the sealing of pump.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
White flexible gasket is comprised of PTFE fiber, Kevlar fiber, high-temperature silicon oil, Vaseline, natural rubber, calcium carbonate.The weight ratio of its each material is:
The preparation method of white flexible gasket is: PTFE fiber, Kevlar fiber, natural rubber and calcium carbonate are pulverized in pulverizer, the mixed powder obtaining is positioned in thermostatically heating container, use whipping device to stir, when stirring to move to be accomplished to, make after the even mixing of mixed powder, add lubricant to continue to stir, whipping process need keep container constant temperature, and temperature remains between 90～180 degree, until complete, stirs the last mud shape product that forms.
High-temperature silicon oil in the present embodiment, has good thermotolerance, water tolerance, electrical insulating property and less surface tension.And there is colourless nonpoisonous and tasteless not volatile characteristic simultaneously.Vaseline has moisture-keeping function, the humidity of maintenance muddy packing that can be intact in product, guarantee that its surface do not chap, and Vaseline can play the effects such as antirust, lubricated, and cheap, therefore in the muddy packing of the present embodiment, add this composition, can make up the muddy packing hardening phenomenon that calcium carbonate may bring, play complementary action, cost performance is very high.Kevlar 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 PTFE blending in of fibers, can make up the feature of PTFE insufficient strength.Natural rubber elasticity is high, has good insulativity, plasticity-, water proof trapping and tensile wear-resistant.Calcium carbonate can increase the volume of goods, and saves expensive natural rubber, thereby greatly reduces costs.Calcium carbonate is inserted in rubber, can obtain the tensile strength higher than gum sulfide, tear strength and wear resistance.
Claims (2)
1. a white flexible gasket, is characterized in that: described white flexible gasket is comprised of 42～48wt%PTFE fiber, 10～15wt%Kevlar fiber, 28～32wt% lubricant, 8～13wt% natural rubber, 2～4wt% calcium carbonate; Described lubricant comprises high-temperature silicon oil and Vaseline, and the mass ratio of high-temperature silicon oil and Vaseline is 5:1.
2. the preparation method of a white flexible gasket according to claim 1, it is characterized in that: PTFE fiber, Kevlar fiber, natural rubber and calcium carbonate are pulverized in pulverizer, the mixed powder obtaining is positioned in thermostatically heating container, use whipping device to stir, when stirring to move to be accomplished to, make after the even mixing of mixed powder, add lubricant to continue to stir, whipping process keeps thermostatically heating container temperature, temperature remains between 90～180 degree, until complete, stirs the last mud shape product that forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310312458.6A CN103342983B (en) | 2013-07-24 | 2013-07-24 | White flexible sealing filler and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312458.6A CN103342983B (en) | 2013-07-24 | 2013-07-24 | White flexible sealing filler and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103342983A CN103342983A (en) | 2013-10-09 |
| CN103342983B true CN103342983B (en) | 2014-11-05 |
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| CN201310312458.6A Active CN103342983B (en) | 2013-07-24 | 2013-07-24 | White flexible sealing filler and preparation method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108517082A (en) * | 2018-03-28 | 2018-09-11 | 陈太师 | A kind of preparation method of choke antirust airtight and watertight padding |
| CN110194875A (en) * | 2019-07-01 | 2019-09-03 | 深圳市德诚旺科技有限公司 | A kind of plastic alloy elastomer formulation |
| 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 |
Citations (4)
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|---|---|---|---|---|
| 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 filler and preparation method 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07179846A (en) * | 1993-12-24 | 1995-07-18 | Ntn Corp | Oil seal ring |
| JP2010095578A (en) * | 2008-10-14 | 2010-04-30 | Nok Corp | Fluororubber composition, cross-linked fluororubber and method for producing the same |
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2013
- 2013-07-24 CN CN201310312458.6A patent/CN103342983B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 filler and preparation method 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 |
Non-Patent Citations (2)
| Title |
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| JP特开2010-95578A 2010.04.30 * |
| JP特开平7-179846A 1995.07.18 * |
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