CN105522794A - Rubber membrane sheet - Google Patents
Rubber membrane sheet Download PDFInfo
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- CN105522794A CN105522794A CN201510161456.0A CN201510161456A CN105522794A CN 105522794 A CN105522794 A CN 105522794A CN 201510161456 A CN201510161456 A CN 201510161456A CN 105522794 A CN105522794 A CN 105522794A
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- rubber
- butadiene
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Abstract
The invention provides a rubber membrane sheet. The rubber membrane sheet comprises a gray fabric and a rubber material coating two sides of the gray fabric. The rubber membrane sheet is characterized in that the outer surface of the rubber membrane sheet contains nanometer alumina. Preferably, a use amount of nanometer alumina in each one rubber layer is 2-4g/m<2>. The rubber membrane sheet has excellent oil resistance.
Description
Technical field
The present invention relates to rubber.
Background technology
In the vehicles of such as car, motorcycle, often need to use a kind of rubber diaphragm, as: gasoline and diesel engine rubber diaphragm, automobile distributor controlled rubber diaphragm, automatic regulating valve rubber diaphragm, and air pressure protective valve diaphragm etc.These diaphragms need softness, oil resistant, high temperature resistant, low temperature resistant, and the intensity that service life is longer and enough, particularly at cold district, often requires that diaphragm can withstand the low temperature of less than-35 DEG C.But the performance of diaphragm of the prior art does not reach above-mentioned requirements.Such as, Chinese patent ZL200510004994.5 proposes a kind of rubber diaphragm of polyurethane, has selected 100 parts of polyurethane rubber HA-5,0.4-0.8 part stearic acid SA, 32-40 part carbon black SANG110 and 3.2-4.0 part Vulcanization accelerator TMTD by weight.This rubber diaphragm is in hardness, stretch breaking strength, elongation rate of tensile failure, drag, times of fatigue, make progress in service life, but do not provide the resistance to low temperature of diaphragm in this patent, we detect the low temperature that this diaphragm only can tolerate-28 DEG C, once temperature is lower than-30 DEG C, rubber composition on diaphragm will harden completely, follow the string, cannot normally work.
CN101837665A discloses a kind of rubber composition and comprises the diaphragm of said composition, and said composition comprises other typical additives of the acrylonitrile-butadiene rubber of 25-47%, second rubber being selected from butadiene rubber, butadiene-styrene rubber, natural rubber and neoprene of 5-20%, the low temperature reinforcing agent of 20-35%, the adhesive of 1-3% and surplus by weight.The rubber diaphragm obtained by said composition has oil resistivity and the lower temperature resistance of improvement.But the oil resistivity of this product still has much room for improvement.
Summary of the invention
The object of this invention is to provide a kind of rubber floor covering, it has superior electric conductivity and mechanical strength.
Rubber diaphragm according to the present invention is made up of grey cloth and the elastomeric material covering two sides, it is characterized in that, the outer surface near rubber diaphragm comprises nano aluminium oxide.
Preferably, in each elastomeric material layer, the introduction volume of nano aluminium oxide is 2-4g/m
2.
In a kind of detailed description of the invention, rubber diaphragm of the present invention is obtained by step below:
Step 1, by rubber constituent mixing 10-20 minute on double roll mill, melting temperature is 30-60 DEG C, makes the even roll banding of rubber raw rubber;
Step 2, adds reinforcing agent, softening agent and other typical additives, bottom sheet after 30-60 DEG C of mixing 10-30min;
Step 3, applies the nano aluminium oxide of scheduled volume in alignment rubber sheet with Powderjet device, then rolls through Liang Zhi tri-road pair roller;
Step 4, dries grey cloth resinoid bond dipping; By the grey cloth of oven dry and the sheet rubber calendering formation on calender on request mixed;
Step 5, the semi-finished product rolled with drum vulcanizer sulfuration, the Stress control of vulcanizer is at 18-20Mpa, and temperature maintains 155-165 DEG C.
Rubber diaphragm according to the present invention has excellent oil resistance.
Detailed description of the invention
In the present invention, introduce nano aluminium oxide in rubber diaphragm, this nano aluminium oxide is not be uniformly distributed in rubber diaphragm, and scatters near the outer surface of rubber diaphragm.Thus obtained rubber diaphragm has higher oil resistance.In exemplary embodiment of the present invention, rubber diaphragm is made up of grey cloth and the rubber layer covering grey cloth both sides, and the thickness of rubber layer is usually in the scope of 1-3mm.In each rubber layer, the introduction volume of nano aluminium oxide is 1-10g/m
2, preferred 2-6g/m
2, more preferably 2-4g/m
2.In the present invention, term " close " be meant to the top layer that nano aluminium oxide not strictly covers diaphragm, it can partly be distributed in the matrix of adjacent surface, be such as distributed in distance outer surface be no more than 1mm, not even more than in the matrix of 0.5mm.Term " outer surface " refers to the outer surface of rubber layer relative to grey cloth.
In order to realize the present invention, nano alumina powder can be sprayed online on the rubber layer refined with Powderjet device, according to the powder spouting velocity of the speed of service adjustment injection apparatus of sheet rubber on production line, to make the applied amount of nano aluminium oxide at the numerical value of expection.Thus, step is below generally included for the preparation of the method for this rubber diaphragm:
Step 1, by rubber constituent mixing 10-20 minute on double roll mill, melting temperature is 30-60 DEG C, makes the even roll banding of rubber raw rubber;
Step 2, adds reinforcing agent, softening agent and other typical additives, bottom sheet after 30-60 DEG C of mixing 10-30min;
Step 3, applies the nano aluminium oxide of scheduled volume in alignment rubber sheet with Powderjet device, then rolls through Liang Zhi tri-road pair roller;
Step 4, dries grey cloth resin-dipping; By the grey cloth of oven dry and the sheet rubber calendering formation on calender on request mixed;
Step 5, the semi-finished product rolled with drum vulcanizer sulfuration, the Stress control of vulcanizer is at 18-20Mpa, and temperature maintains 155-165 DEG C.
In a kind of exemplary embodiment of the present invention, this rubber composition by comprising acrylonitrile-butadiene rubber, be selected from butadiene rubber, one second rubber, low temperature reinforcing agent, softening agent, adhesive and other auxiliary materials in group that butadiene-styrene rubber, natural rubber and neoprene form be prepared from.
Acrylonitrile-butadiene rubber is obtained through emulsion polymer by butadiene and acrylonitrile, there is good oil resistivity, wearability, heat resistance and caking property, also there is good resistance to water, air-tightness simultaneously, but then poor in lower temperature resistance, ozone resistance, electrical property and elasticity.The second rubber selected by the present invention then has good elasticity, lower temperature resistance and higher intensity (showing as higher anti-wear performance), but then not ideal in hot strength, tearing strength and processing characteristics.The present invention adds above-mentioned second rubber in acrylonitrile-butadiene rubber, can realize having complementary advantages, and reaches the oil resistivity of this rubber composition and the well balanced of lower temperature resistance.
In rubber composition of the present invention, comprise the typical additives of 25-47% part acrylonitrile-butadiene rubber, above-mentioned second rubber of 5-20%, 20-30% low temperature reinforcing agent, 1-3% adhesive and surplus by weight.Second rubber can be only the single components such as butadiene-styrene rubber, natural rubber, butadiene rubber or neoprene, also can be their mixture.
In the preferred embodiment of the present invention, rubber composition comprises other typical additives of the acrylonitrile-butadiene rubber of 40-45%, second rubber being selected from butadiene rubber, butadiene-styrene rubber, natural rubber and neoprene of 10-15%, the low temperature reinforcing agent of 30-35%, the adhesive of 1-3% and surplus by weight.
Low temperature reinforcing agent used in the present invention includes but not limited to: white carbon.
Softening agent used in the present invention includes but not limited to repefral, dioctyl phthalate, dibutyl phthalate, di-heptanyl adipate, dioctyl adipate, dinonyl adipate, didecyl adipate, pimelic acid two heptyl ester, pimelic acid dioctyl ester, pimelic acid two ester in the ninth of the ten Heavenly Stems, pimelic acid didecyl, suberic acid two heptyl ester, suberic acid dioctyl ester, suberic acid two ester in the ninth of the ten Heavenly Stems, suberic acid didecyl, azelaic acid two heptyl ester, dioctyl azelate, azelaic acid two ester in the ninth of the ten Heavenly Stems, azelaic acid didecyl, decanedioic acid two heptyl ester, di-n-octyl sebacate, di-n-nonyl sebacate, or decanedioic acid didecyl, wherein preferably use repefral, di-n-octyl sebacate.
Be not particularly limited for adhesive of the present invention, as long as required cohesive force can be provided, and chemical attack effect do not produced to rubber constituent.Operable example comprises adhesive A, adhesive RS, adhesive RH, phenolic resins, the solid grand resin of horse, 589 resins.
In the present invention, some other additives are usually also used, such as pigment, age resistor, vulcanizing agent and promoter.Wherein the use amount of pigment is preferably 1% of rubber composition weight, mainly in order to painted; The use amount of age resistor is preferably the 1-2% of rubber composition weight, and age resistor has and prevents the aging of product, and improve the effect in service life, the use amount of vulcanizing agent and promoter is about 2% of rubber composition weight.
Herein, when describe with degree rubber composition formula time, above-mentioned nano alumina material does not count.The consumption of nano aluminium oxide is area according to rubber diaphragm and determines.
Above-mentioned rubber composition can be used for producing rubber diaphragm, and this rubber diaphragm is formed through calendering formation after cure by above-mentioned rubber composition and framework material.This rubber diaphragm has higher oil resistivity and lower temperature resistance.
Framework material for rubber diaphragm of the present invention is that preferably, this graticule has identical arrangement density by the identical embryo cloth be made into through, parallel of thickness.The material that can be used as framework material comprises woven dacron, polyamide fabric, nylon cloth.
In order to manufacture above-mentioned rubber diaphragm, above-mentioned various composition can be taken by weight proportion; Acrylonitrile-butadiene rubber is mixed on a mill until with the second rubber, then by the rubber mixed and the material banbury banburying prepared.Framework material cloth adhering resin is flooded, then dries; The framework material of drying and the rubber mixed, by calendering formation, make the thickness and the width that reach needs; The semi-finished product that last sulfuration has been rolled.
Technique of the present invention is simple, is convenient to implement.
The advantage of the preparation method of rubber composition of the present invention, rubber diaphragm and rubber diaphragm is further illustrated below in conjunction with specific embodiment.
Embodiment 1-3 and comparative example 1-3
By formulated embodiment 1-4 rubber composition listed in table 1.Operate according to abovementioned steps, unit are sheet rubber applies 3-4g nano aluminium oxide.Repeat the operation of embodiment 1-4, but do not apply nano aluminium oxide, respectively as comparative example 1-4.
The pulp furnish of table 1. embodiment 1-4
* vulcanizing agent adopts the mixture of Sulfur and dithio morpholine (DTDM); Promoter adopts N, N ' the two sulphur carbon amine (TMTD) of-tetramethyl two sulphur
Carry out performance test to diaphragm prepared by embodiment and comparative example 1-4, its testing standard is: 1. the oil resistant adhesive plaster specification method of inspection measures according to GB7538; 2. intensity, percentage elongation are pressed HG/T2580 and are measured; 3. adhesive force measures according to GB10720; 4. oil resistivity measures according to GB1690.Concrete method of testing and test result as follows:
Oil resistivity is tested
Diaphragm prepared by the diaphragm prepared by embodiment 1-6 and comparative example 1-2 is cut into sample fritter on request, assay balance weighs, then load weighted fritter is put into the experimental solutions prepared, at laboratory temperature under the condition of 23 ± 2 DEG C, flood 24 hours, then take out, park 6 hours, weigh again, finally calculate oil resistivity data.
Lower temperature resistance is tested
The refrigeration test case that above-mentioned sample fritter puts into-50 DEG C is deposited 24 hours, takes out, by bending for sample fritter 180 degree of maintenances 30 minutes, sample surfaces did not have seminess.
Adhesive force is tested
Diaphragm prepared by the diaphragm prepared by embodiment 1-6 and comparative example 1-2 is cut into the fritter that width is 2.5cm respectively, then uses rubber tensile testing machine test sample adhesive force.
The Performance comparision of table 2 test specimen and reference substance
※weight rate
As can be seen from the data of table 2, the rubber diaphragm being applied with nano aluminium oxide is significantly improved in oil resistivity.Unchanged in adhesive force, also without marked change in resistance to low temperature, just in partial example, show decline.The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a rubber diaphragm, it is made up of grey cloth and the elastomeric material covering two sides, it is characterized in that, the outer surface near rubber diaphragm comprises nano aluminium oxide.
2. rubber diaphragm according to claim 1, wherein, in each elastomeric material layer, the introduction volume of nano aluminium oxide is 2-4g/m
2.
3. rubber diaphragm according to claim 1, it is obtained by step below:
Step 1, by rubber constituent mixing 10-20 minute on double roll mill, melting temperature is 30-60 DEG C, makes the even roll banding of rubber raw rubber;
Step 2, adds reinforcing agent, softening agent and other typical additives, bottom sheet after 30-60 DEG C of mixing 10-30min;
Step 3, applies the nano aluminium oxide of scheduled volume in alignment rubber sheet with Powderjet device, then rolls through Liang Zhi tri-road pair roller;
Step 4, dries grey cloth resinoid bond dipping; By the grey cloth of oven dry and the sheet rubber calendering formation on calender on request mixed;
Step 5, the semi-finished product rolled with drum vulcanizer sulfuration, the Stress control of vulcanizer is at 18-20Mpa, and temperature maintains 155-165 DEG C.
4. rubber diaphragm according to claim 3, wherein, described elastomeric material comprises other typical additives of the acrylonitrile-butadiene rubber of 25-47%, second rubber being selected from butadiene rubber, butadiene-styrene rubber, natural rubber and neoprene of 5-20%, the low temperature reinforcing agent of 20-35%, the adhesive of 1-3% and surplus by weight.
5. rubber diaphragm according to claim 4, wherein, described elastomeric material comprises other typical additives of the acrylonitrile-butadiene rubber of 40-45%, second rubber being selected from butadiene rubber, butadiene-styrene rubber, natural rubber and neoprene of 10-15%, the low temperature reinforcing agent of 30-35%, the adhesive of 1-3% and surplus by weight.
6. rubber diaphragm according to claim 4, wherein, described low temperature reinforcing agent is white carbon.
7. rubber diaphragm according to claim 4, wherein, described second rubber is butadiene rubber.
8. rubber diaphragm according to claim 7, wherein, described elastomeric material comprise by weight 45% acrylonitrile-butadiene rubber, 10% butadiene rubber, the white carbon of 35%, the adhesive of 3% and 5% softening agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510161456.0A CN105522794B (en) | 2015-04-07 | 2015-04-07 | A kind of rubber diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510161456.0A CN105522794B (en) | 2015-04-07 | 2015-04-07 | A kind of rubber diaphragm |
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| Publication Number | Publication Date |
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| CN105522794A true CN105522794A (en) | 2016-04-27 |
| CN105522794B CN105522794B (en) | 2019-01-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114714548A (en) * | 2022-03-09 | 2022-07-08 | 广州流体密封科技有限公司 | Preparation method of wear-resistant and winding-resistant composite diaphragm for filling valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5602197A (en) * | 1989-05-30 | 1997-02-11 | Corning Incorporated | Reversible polymer gel binders for powder forming |
| CN101525450A (en) * | 2009-03-26 | 2009-09-09 | 上海大学 | Method of using inorganic nanometer functional powder for reinforcing medium resistance of vulcanized rubber |
| CN101837665A (en) * | 2010-05-27 | 2010-09-22 | 上海加富橡胶制品有限公司 | Rubber combination and diaphragm containing same |
-
2015
- 2015-04-07 CN CN201510161456.0A patent/CN105522794B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5602197A (en) * | 1989-05-30 | 1997-02-11 | Corning Incorporated | Reversible polymer gel binders for powder forming |
| CN101525450A (en) * | 2009-03-26 | 2009-09-09 | 上海大学 | Method of using inorganic nanometer functional powder for reinforcing medium resistance of vulcanized rubber |
| CN101837665A (en) * | 2010-05-27 | 2010-09-22 | 上海加富橡胶制品有限公司 | Rubber combination and diaphragm containing same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114714548A (en) * | 2022-03-09 | 2022-07-08 | 广州流体密封科技有限公司 | Preparation method of wear-resistant and winding-resistant composite diaphragm for filling valve |
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| CN105522794B (en) | 2019-01-01 |
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