CN103849155A - Fiber cork rubber sealing material and preparation method thereof - Google Patents
Fiber cork rubber sealing material and preparation method thereof Download PDFInfo
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- CN103849155A CN103849155A CN201210522356.2A CN201210522356A CN103849155A CN 103849155 A CN103849155 A CN 103849155A CN 201210522356 A CN201210522356 A CN 201210522356A CN 103849155 A CN103849155 A CN 103849155A
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Abstract
The invention discloses a fiber cork rubber sealing material and a preparation method thereof. The problem that the conventional sealing gasket is relatively low in tensile strength, low in compressive property and high in stress relaxation performance is solved. The fiber cork rubber sealing material mainly consists of the following substances in percent by weight: 8-35 percent of latex, 20-65 percent of granulated cork, 5-40 percent of fiber, 1.2-6 percent of compounding agent and the balance of filler, wherein the length of the fiber is more than 1.0mm and less than 30.0mm. The fiber cork rubber sealing material has the advantages that the tensile strength is improved, the compressive property is improved, and a phenomenon that the stress relaxation performance is increased is effectively avoided.
Description
Technical field
The present invention relates to a kind of sealed liner, specifically refer to Fibre cork rubber sealing material and preparation method thereof.
Background technology
The material of cork-rubber plate is to be equipped with various synthetic rubber and other subsidiary material as raw material with granulated cork, granulated cork is evenly mixed with synthetic rubber and the subsidiary material including stopping composition with the mill of general manufacture rubber item or Banbury mixer, after being rolled into, then finished product sulfuration is formed.Granulated cork is to be become by many suberin cell aggregations that are full of air, has the skeleton of cellulosic materials on cell walls, covers suberin and cork wax on it, becomes a kind of waterproof material, thereby can be not rotten, also there is no obvious aging sign.
Cork gasket have density low, compressible, flexible, do not conduct heat, non-conductive, airtight, durable, water proof, protection against the tide, oil resistant, acidproof, erosion resistance, vibration damping, sound insulation, a series of good characteristics such as fire-retardant, wear-resisting are a kind of well sealing materials.; cork-rubber panel material still exists some insoluble drawbacks; as: granulated cork is due to surface imperfection; and then exist many chemical compositions of being combined with rubber of being not easy to; so need to just can be bonded to and open than relatively large rubber; but owing to thering is a large amount of rubber; after it is bonded to; the tensile strength of finished product is just relatively low; when application as encountered the parts that interior pressure is slightly high; gasket seal tends to because undercapacity is ruptured by impact extrusion, causes medium in parts to external leakage.
And gasket seal, in the time of application, needs bolt fastening to the flange face of joint and the integration of gasket seal surface, can directly apply enclosure pressure to sheet gasket structure by flange face, i.e. flange pressure in the time tighting a bolt.The structure of existing gasket seal is fastening not, and compressive property is low, under conventional flange pressure, gasket construction can be crushed, and causes pad to lose the usefulness of sealing, and then makes medium to external leakage.Meanwhile, due to the effect of flange pressure, the constituent structure of pressurized place sealing material can be to the direction creeping deformation of decompression, thereby causes the stress relaxation performance of pad to become large.Flange pressure is larger, and the stress relaxation of gasket material can be larger, thereby causes the slowly attenuation of thickness of gasket construction, can come up, and then cause medium to external leakage in tightness system with the flange face of bolted and the contact surface of pad.
Summary of the invention
Object of the present invention is mainly that the existing gasket seal tensile strength of solution is relatively low, compressive property is low, stress relaxation performance becomes large problem, and a kind of Fibre cork rubber sealing material addressing the above problem and preparation method thereof is provided.
The present invention is achieved through the following technical solutions:
Fibre cork rubber sealing material, is mainly made up of the material of following weight percent:
Latex 8%～35%
Particulate state cork 20%～65%
Fiber 5%～40%
Synergist S-421 95 1.2%～6%,
All the other are stopping composition, and the length of described fiber is for being greater than 1.0mm, but are less than 30.0mm.
Further, described fiber comprises vegetable fibre and synthon.
Further, in described fiber, also comprise inorganic fibre.
Preferred as one, described vegetable fibre is selected from cotton fibre, flaxen fiber, brown fiber, xylon, bamboo fibers, straw fiber; Described synthon are selected from nylon fiber, aramid fiber, polyester fiber, polyacrylonitrile fibre; Described inorganic fibre is selected from mineral wool fibre, glass fibre, ceramic fiber, carbon fiber.
In addition, the size of described particulate state cork is 20～320 orders.
Preferably, the size of described particulate state cork is 40～200 orders.
Preferred as another kind, described stopping composition is silicate minerals stopping composition; Described latex is selected from butyronitrile latex, butadiene-styrene latex, neoprene latex, polyacrylonitrile latex, natural emulsion, carboxyl latex, butyl latex, fluorine latex, silicon latex.
As the distributing style having most, the Synergist S-421 95 of described 1.2%～6% weight percent comprises the zinc oxide of 0.2%～1% weight percent, the thiofide of 0.2%～1% weight percent, the sulphur of 0.2%～1% weight percent, anti-aging agent, the stablizer of 0.2%～1% weight percent and the pigment of 0.2%～1% weight percent of 0.2%～1% weight percent.
The preparation method of Fibre cork rubber sealing material, is mainly made up of following steps:
(1) fiber is carried out to the modification in paper technology, particulate state cork, stopping composition obtain mixture after mixing with Synergist S-421 95;
(2), by fiber after treatment and mixture mix and blend, add again latex and flocculation agent to obtain slurry after dispersed;
(3) after slurry fully flocculates, then get, dewater, become, make sheet material after drying step by copying in paper technology successively.
In order more to be met the Fibre cork rubber sealing material of user's demand, described sheet material by roll-in or/and sulfuration step after make finished product.
The present invention has the following advantages and beneficial effect:
1, product of the present invention not only has tough physicals, more can obtain considerable improvement than existing cork-rubber panel material in resistance to compression and creep resistance aspect loose, meanwhile, the cork rubber sealing material that the present invention produces also has superior sealing property.
What 2, the present invention adopted is the technique taking water as the similar papermaking of medium, make the raw material that gasket material uses in water medium, present negative charge, thereby ensure that stock yard repels mutually because of negative charge, and then contribute to improve the dispersion effect between raw material, allow fiber can be uniformly dispersed between cork and synthetic rubber and can conglomeration, effectively increase physical and mechanical properties of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but embodiments of the present invention are not limited to this.
Embodiment 1
Adopt respectively proportioning in following table 1 to produce the Fibre cork rubber sealing material of A of the present invention, B, tri-kinds of different fibre contents of C,
Table 1
| Sample type | A | B | C |
| Fiber | 22% | 8% | 35% |
| Particulate state cork | 37% | 40% | 37% |
| Silicate minerals stopping composition | 13% | 24% | 10% |
| Latex | 23% | 23% | 23% |
| Synergist S-421 95 | 5% | 5% | 5% |
Wherein, fiber is xylon, and the size of particulate state cork is 100 orders, and latex adopts the fine latex of fourth.
The preparation method of above-mentioned A, B, tri-kinds of Fibre cork rubber sealing materials of C is as follows:
Xylon is carried out to modification, concrete steps are: xylon is dropped in pulping engine, add water by xylon concentration dilution to approximately 4%, pull an oar ten minutes at a high speed, make xylon disperse to form wood pulp cellulose, then the disc refiner by paper grade (stock) is the slurry (note: beating degree only generally only represents the water filtering performance of paper pulp, but in the paper industry also usual degree of fiber through disc refiner dimension fibrillation that represent) of 30～40 ° of SR wood pulp cellulose primitive fiber to beating degree.
In another pulping engine, drop into stopping composition, particulate state cork and Synergist S-421 95 by above-mentioned formula, being diluted with water to total raw material concentration is 6～8%, ten minutes abundant dispersing and mixing of high-speed stirring obtain mixture.
Wood pulp cellulose slurry after modification is added in the pulping engine of contain mixtures, be diluted with water to mixed slurry concentration approximately 2%, continue stir about 20 minutes until the abundant dispersing and mixing of slurry.
Add the fine latex of fourth, stir about 5 minutes, until latex fully mixes with the slurry in mixing pit, adds water and adjusts beating consistency to 1%, slurry is delivered to copy after evenly and gets paper machine and copy to get and be dehydrated into sheet material.
After sheet material is fully dried, to after predetermined thickness, sheet material is delivered to vulcanizing press baking (curing temperature: 150C, sulfide stress: 2MPa through roll squeezer roll-in, curing time: 4-6 minute), finally form Fibre cork rubber material of the present invention.
Finished product to the A making in the present embodiment, B, tri-kinds of different fibre contents of C detects, and cork fibrous elastomeric material in fiberless cork-rubber material and prior art is detected, wherein, fiberless cork-rubber material is to obtain from market, not fibre-bearing of its composition, cork content and example of the present invention are similar with cork content.Detected result is as following table 2,
Table 2
| Test item | A | B | C | Fiberless cork-rubber material | Cork fibrous elastomeric material in prior art |
| Fibre content | 22% | 8% | 35% | 0% | 6% |
| Density (gram/cc) | 1.05 | 1.1 | 1.05 | 1.05 | 1.1 |
| Thickness (millimeter) | 1.2 | 1.2 | 1.25 | 1.25 | 1.25 |
| Tensile strength, MPA | 16.6 | 7.1 | 25. | 2.36 | 4.5 |
| Rate of compression (%) | 14.6 | 13.0 | 15.1 | 17.5 | 15.2 |
| Rebound degree (%) | 74.2 | 65.4 | 70.3 | 72.9 | 70.78 |
| #903 lubricating oil dip test (150 C, 5 hours) | ? | ? | ? | ? | ? |
| Soak back draft intensity, MPA | 9.45 | 5.4 | 15.4 | 1.19 | 2.85 |
| Oil absorbency (%) | 19.2 | 12.3 | 17.5 | 11.4 | 12.7 |
| Thicken rate (%) | 7.8 | 5.2 | 7.3 | 4.8 | 4.8 |
| Resistance to compression experiment (3) | 85Mpa | 35Mpa | 116Mpa | Not resistance to compression | 15 Mpa |
| Stress relaxation | 35% | 60% | 32% | 》90% | 74% |
| Oil seal | Do not leak | Do not leak | Do not leak | Do not leak | Do not leak |
By can fully demonstrate the intensity and the compressive property that add fiber can increase product in above-mentioned table 2 in cork-rubber gasket material, also can lower the stress relaxation ability of gasket material.Meanwhile, A of the present invention, B, tri-kinds of its intensity of finished product of C, resistance to compression, and stress relaxation etc. performance etc. all tool increase significantly.
Embodiment 2
The present embodiment is to use different types of fiber to make Fibre cork rubber sealing material, is only with the difference of embodiment 1, and in the present embodiment, the composition of each material is different with proportioning, and the present embodiment is made up of the material of five kinds of formulas in following table 3 and proportioning,
Table 3
| Sample type | 1a | 1b | 1c | 1d | 1f |
| Wood pulp cellulose | 18% | ? | ? | ? | ? |
| Leaf of bamboo fiber | ? | 18% | ? | ? | ? |
| Flaxen fiber | ? | ? | 18% | ? | ? |
| Aramid fiber | ? | ? | ? | 18% | ? |
| Acrylic fiber | ? | ? | ? | ? | 18% |
| Fine particle cork | 37% | 37% | 37% | 37% | 37% |
| Silicate minerals stopping composition | 17% | 17% | 17% | 17% | 17% |
| Latex (fourth is fine) | 23% | 23% | 23% | 23% | 23% |
| Dispersion agent | 1% | 1% | 1% | 1% | 1% |
| Synergist S-421 95 | 4% | 4% | 4% | 4% | 4% |
The physicals tabular that uses the Fibre cork rubber sealing material that above formula makes is in table 4:
Table 4
| Test item | 1a | 1b | 1c | 1d | 1f |
| Density (gram/cc) | 1.02 | 1.05 | 1.02 | 1.05 | 1.06 |
| Thickness (millimeter) | 1.2 | 1.3 | 1.25 | 1.2 | 1.2 |
| Tensile strength, MPA | 13.5 | 12.2 | 10.7 | 15.4 | 10.2 |
| Rate of compression (%) | 14.6 | 13.2 | 13.6 | 14.3 | 14.1 |
| Rebound degree (%) | 69.3 | 67.2 | 64.2 | 65.4 | 58.2 |
| #903 lubricating oil dip test (150 C, 5 hours) | ? | ? | ? | ? | ? |
| Soak back draft intensity, MPA | 8.3 | 7.4 | 7.2 | 10.4 | 6.3 |
| Oil absorbency (%) | 18.3 | 16.2 | 16.4 | 17.5 | 20.3 |
| Thicken rate (%) | 8.4 | 7.2 | 7.1 | 7.9 | 8.3 |
| Resistance to compression experiment (3) | 90Mpa | 74Mpa | 74Mpa | 105Mpa | 55Mpa |
| Stress relaxation | 32% | 36% | 38% | 30% | 45% |
| Oil seal | Do not leak | Do not leak | Do not leak | Do not leak | Do not leak |
The above results fully demonstrates the popularity of the fiber of the present invention's use, no matter that the fiber of natural character is (as wood pulp cellulose, leaf of bamboo fiber, or flaxen fiber) or artificial synthetic fiber (as aramid fiber, or acrylic), all can be used in the reinforcing fiber of technique of the present invention as Fibre cork rubber sealing material.
Embodiment 3
The present embodiment is to use different types of blend fiber, includes organic fiber and inorganic fibre, is applied in Fibre cork rubber sealing material, and its system component is as following table 5:
Table 5
| Sample type | 2a | 2b | 2c | 2d | 2f |
| Wood pulp cellulose | 12% | 8% | 10% | ? | ? |
| Mineral wool fibre | ? | 14% | ? | 14% | ? |
| Polyester fiber | ? | ? | 8% | ? | 10% |
| Aramid fiber | 6% | ? | ? | 8% | 7% |
| Fine particle cork | 37% | 35% | 37% | 35% | 37% |
| Silicate minerals stopping composition | 17% | 15% | 17% | 15% | 18% |
| Latex (fourth is fine) | 23% | 23% | 23% | 23% | 23% |
| Dispersion agent | 1% | 1% | 1% | 1% | 1% |
| Synergist S-421 95 | 4% | 4% | 4% | 4% | 4% |
The physicals table of the Fibre cork rubber sealing material that more than using, formula is made by method of the present invention is listed in the table below 3:
Table 6
| Sample type | 2a | 2b | 2c | 2d | 2f |
| Density (gram/cc) | 1.1 | 1.05 | 1.02 | 1.1 | 1.04 |
| Thickness (millimeter) | 1.2 | 1.25 | 1.25 | 1.28 | 1.2 |
| Tensile strength, MPA | 16.9 | 8.4 | 14.3 | 10.3 | 14.8 |
| Rate of compression (%) | 14.7 | 12.5 | 13.2 | 11.9 | 13.9 |
| Rebound degree (%) | 68.4 | 62.3 | 64.5 | 62.7 | 63.7 |
| #903 lubricating oil dip test (150 C, 5 hours) | ? | ? | ? | ? | ? |
| Soak back draft intensity, MPA | 10.3 | 6.1 | 9.6 | 7.2 | 10.5 |
| Oil absorbency (%) | 17.4 | 14.3 | 15.1 | 15.4 | 14.9 |
| Thicken rate (%) | 8.6 | 8.1 | 7.5 | 7.7 | 8.9 |
| Resistance to compression experiment (3) | 95Mpa | 45Mpa | 74Mpa | 64Mpa | 74Mpa |
| Oil seal | Do not leak | Do not leak | Do not leak | Do not leak | Do not leak |
From the results shown in Table 6, the present invention not only can use single kind of fiber, uses and also can reach good results of property as same in the result of embodiment 1 and embodiment 2 by different blending in of fibers.
It is more worth that what mention is in the sample 2b and sample 2d in embodiment 3, the fiber that formula uses has comprised mineral wool fibre, while producing cork fibrous elastomeric material with rubber sweetening process processed, the production unit no matter using belongs to that type, the dispersion of batching and mixing are all by shearing, smash to pieces, friction, the fierce mechanical effect of kneading etc. is carried out.General inorganic fibre (comprising mineral wool fibre or glass fibre) is because structure is all harder crisp, tends to be cut off and smash to pieces and lose reinforcement effect of fiber completely by fierce mechanical effect in the production process of rubber system refining.
Sample 2b in the present embodiment and the performance of sample 2d, not only there is good tensile strength, the stiffness of sample is not good containing the sample of mineral wool than other yet, fully prove to reach the effect that uses mineral wool fibre expection, also further demonstrate method of the present invention superiority to formula material use in the time producing cork fibrous elastomeric material.
Embodiment 4
The present embodiment is to use different types of emulsion binder, and its system component is as following table 7:
Table 7
| Sample type | 3a | 3b | 3c | 3d | 3f |
| Synthetic organic fibre | 22% | 22% | 22% | 22% | 22% |
| Fine particle cork | 37% | 37% | 37% | 37% | 37% |
| Silicate minerals stopping composition | 13% | 13% | 14% | 14% | 13% |
| The fine latex of fourth | 23% | ? | ? | ? | 10% |
| Butadiene-styrene latex | ? | 22% | ? | ? | 12% |
| Neoprene latex | ? | ? | 20% | ? | ? |
| Natural emulsion | ? | ? | ? | 20% | ? |
| Dispersion agent | 1% | 1% | 1% | 1% | 1% |
| Synergist S-421 95 | 4% | 5% | 6% | 6% | 4% |
The physicals tabular that uses the Fibre cork rubber sealing material that above formula makes by method of the present invention is in table 8:
Table 8
| Test item | 3a | 3b | 3c | 3d | 3f |
| Density (gram/cc) | 1.1 | 1.15 | 1.02 | 1.1 | 1.05 |
| Thickness (millimeter) | 1.24 | 1.2 | 1.25 | 1.25 | 1.2 |
| Tensile strength, MPA | 17.1 | 13.5 | 13.2 | 11.2 | 14.8 |
| Rate of compression (%) | 14.7 | 15.3 | 16.2 | 15.4 | 14.2 |
| Rebound degree (%) | 69.2 | 70.3 | 68.3 | 66.3 | 63.5 |
| #903 lubricating oil dip test (150 C, 5 hours) | ? | ? | ? | ? | ? |
| Soak back draft intensity, MPA | 9.95 | 8.5 | 8.2 | 7.2 | 10.2 |
| Oil absorbency (%) | 17.3 | 20.4 | 21.2 | 18.3 | 16.3 |
| Thicken rate (%) | 8.4 | 14.5 | 15.3 | 16.2 | 8.9 |
| Resistance to compression experiment (3) | 90Mpa | 45Mpa | 45Mpa | 50Mpa | 75Mpa |
| Oil seal | Do not leak | Do not leak | Do not leak | Do not leak | Do not leak |
From the results shown in Table 8, the present invention not only can use different types of emulsion binder, also can mix and use with different types of latex, all can't harm superiority of the present invention.
Can draw by above-described embodiment, by formula of the present invention and method improve tensile strength in conjunction with can effectively realizing, increase compressive property low, effectively avoid stress relaxation performance to become large object.As mentioned above, just can realize preferably the present invention.
Claims (10)
1. Fibre cork rubber sealing material, is characterized in that, is mainly made up of the material of following weight percent:
Latex 8%～35%
Particulate state cork 20%～65%
Fiber 5%～40%
Synergist S-421 95 1.2%～6%,
All the other are stopping composition, and the length of described fiber is for being greater than 1.0mm, but are less than 30.0mm.
2. Fibre cork rubber sealing material according to claim 1, is characterized in that, described fiber comprises vegetable fibre and synthon.
3. Fibre cork rubber sealing material according to claim 2, is characterized in that, also comprises inorganic fibre in described fiber.
4. Fibre cork rubber sealing material according to claim 3, is characterized in that, described vegetable fibre is selected from cotton fibre, flaxen fiber, brown fiber, xylon, bamboo fibers, straw fiber; Described synthon are selected from nylon fiber, aramid fiber, polyester fiber, polyacrylonitrile fibre; Described inorganic fibre is selected from mineral wool fibre, glass fibre, ceramic fiber, carbon fiber.
5. Fibre cork rubber sealing material according to claim 1, is characterized in that, the size of described particulate state cork is 20～320 orders.
6. Fibre cork rubber sealing material according to claim 5, the size of described particulate state cork is 40～200 orders.
7. according to the Fibre cork rubber sealing material described in claim 1～6 any one, it is characterized in that, described stopping composition is silicate minerals stopping composition; Described latex is selected from butyronitrile latex, butadiene-styrene latex, neoprene latex, polyacrylonitrile latex, natural emulsion, carboxyl latex, butyl latex, fluorine latex, silicon latex.
8. according to the Fibre cork rubber sealing material described in claim 1～6 any one, it is characterized in that, the Synergist S-421 95 of described 1.2%～6% weight percent comprises the zinc oxide of 0.2%～1% weight percent, the thiofide of 0.2%～1% weight percent, the sulphur of 0.2%～1% weight percent, anti-aging agent, the stablizer of 0.2%～1% weight percent and the pigment of 0.2%～1% weight percent of 0.2%～1% weight percent.
9. according to the preparation method of the Fibre cork rubber sealing material described in claim 1～8 any one, it is characterized in that, mainly formed by following steps:
(1) fiber is carried out to the modification in paper technology, particulate state cork, stopping composition obtain mixture after mixing with Synergist S-421 95;
(2), by fiber after treatment and mixture mix and blend, add again latex and flocculation agent to obtain slurry after dispersed;
(3) after slurry fully flocculates, then get, dewater, become, make sheet material after drying step by copying in paper technology successively.
10. the preparation method of Fibre cork rubber sealing material according to claim 9, is characterized in that, described sheet material by roll-in or/and sulfuration step after make finished product.
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| CN108165025A (en) * | 2017-12-25 | 2018-06-15 | 全椒县新华机械有限责任公司 | A kind of preparation method of the effective sealing ring of impact resistance diesel engine oil |
| CN113588371A (en) * | 2021-08-07 | 2021-11-02 | 江西理工大学 | Mechanical property analysis method of fiber reinforced filling body under different fiber effects |
| CN113588371B (en) * | 2021-08-07 | 2024-05-03 | 江西理工大学 | Mechanical property analysis method of fiber reinforced filling body under different fiber actions |
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Address after: 610000 Chengdu City, New District, Sichuan stone beach town Guangming Village Shilong Road, No. 88 Patentee after: Chengdu Jun Ma sealing Polytron Technologies Inc Address before: 610000 Chengdu City, New District, Sichuan stone beach town Guangming Village Shilong Road, No. 88 Patentee before: CHENGDU JUNMA SEALING PRODUCTS CO., LTD. |
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Denomination of invention: Fiber cork rubber sealing material and its preparation method Effective date of registration: 20200907 Granted publication date: 20160928 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: CHENGDU JUNMA SEALING TECHNOLOGY Co.,Ltd. Registration number: Y2020980005787 |
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Date of cancellation: 20211124 Granted publication date: 20160928 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: CHENGDU JUNMA SEALING TECHNOLOGY CO.,LTD. Registration number: Y2020980005787 |