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Rubber sealing product and preparation method and application thereof

A technology of rubber seals and products, applied in mechanical equipment, cocks including cut-off devices, valve devices, etc., can solve the problems of inability to vulcanize high-elasticity rubber seals, inability to vulcanize and mold rubber seals, etc., and achieve excellent gas resistance and rapid Pressure release performance, excellent shear and extrusion resistance, long service life

Active Publication Date: 2016-08-17
SHANGHAI REAL SEALING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent (publication number: CN1948377A) discloses a fiber-reinforced graphite rubber sheet and its preparation method. A small amount of short aramid fibers and aramid pulp are added to its components for reinforcement, but its invention is mainly about high filling flexibility Graphite, reduce the content of rubber as a binder, and increase the service temperature of the graphite rubber sheet. This rubber composite sheet is used on the pipe flange and cannot be vulcanized into various shapes of high-elastic rubber seals.
Chinese patent (publication number: CN1570012A) discloses a sealing packing for oil field pumping units and its application method. The sealing packing includes tetrafluoroethylene plastic, fluororubber, graphite powder, aramid fiber, molybdenum disulfide and No. Vulcanizing agent, also this invention relates to the sealing packing used in industrial equipment, which cannot be vulcanized into rubber seals of various shapes

Method used

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  • Rubber sealing product and preparation method and application thereof
  • Rubber sealing product and preparation method and application thereof
  • Rubber sealing product and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1－6

[0058] Take and prepare materials by the formula (weight part) consumption of the embodiment 1-6 shown in table 1, earlier under the temperature of about 80 ℃, 1 / 2 rubber polymer is in two-roll mill (Taiwan Wei Fuxing 12 inch ) to be masticated evenly and covered with rolls, then PPTA pulp (or pulp masterbatch) is added to the open mill to make it evenly mixed, and then the remaining 1 / 2 of the rubber polymer is added to the open mill to mix evenly. Then mix the vulcanizing agent, carbon black filler and other rubber additives evenly, and slowly add them into the open mill to make them mix evenly with the rubber, and then release the sheet to obtain the rubber compound. After the prepared mixed rubber was aged for about 16 hours, it was re-milled and produced into tablets for later use. Under the condition of one-stage vulcanization for 10 minutes at a temperature of about 180° C., the obtained rubber mixture was molded and vulcanized into a standard rubber test piece, and the...

Embodiment 7-9

[0066] The formula (parts by weight) of the embodiment 7-9 shown in table 3 is used to take the raw materials, and the tetrapropylene fluororubber 100H, carbon black, aramid pulp, cross-linking agent TAIC-S70 and P-14 (40%) and mold release agent are added in the open mill (same as Example 1), and mixed evenly at about 80°C, Obtain tetrapropylene fluoride rubber compound rubber. Prepare the material. The mixed rubber of this example is molded and vulcanized into a standard rubber test piece at a temperature of 180° C. for 10 minutes in one-stage vulcanization, and then vulcanized in a second stage for 4 hours at a temperature of 200° C.

[0067] table 3

[0068]

[0069] The test pieces prepared in Examples 7-9 were prepared and tested according to the above-mentioned standard test strips, and the specific performance data are as described in Table 4.

[0070] Table 4

[0071]

[0072] As can be seen from the data in Table 4, in tetrapropylene fluorine rubber, the ha...

Embodiment 10-15

[0074] Weigh the raw materials according to the formula (parts by weight) of Examples 10-15 shown in Table 5, then add raw materials such as fluororubber peroxide, carbon black, aramid pulp, vulcanizing agent and processing aids to the mill (Same as Example 1), kneaded at 80° C. to obtain a fluororubber compound. The mixed rubber of this embodiment was molded and vulcanized into a standard rubber test piece at a temperature of 180° C. under the condition of one-stage vulcanization for 10 minutes, and then vulcanized in two stages at a temperature of 200° C. for 12 hours.

[0075] table 5

[0076]

[0077] The test pieces prepared in Examples 10-15 were prepared and tested according to standard test strips, and the performance data of the examples are as described in Table 6.

[0078] Table 6

[0079]

[0080] From the data in Table 6, it can be seen that the In the fluororubber of the peroxidation vulcanization system, adding a certain amount of aramid pulp to Exampl...

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Abstract

The invention discloses a rubber sealing product and a preparation method and application thereof. The rubber sealing product is prepared from, by weight, 75-98 parts of sealing rubber polymer, 2-25 parts of aramid pulp, 30-90 parts of rubber filler, 2-15 parts of a vulcanizing agent and 0-35 parts of rubber auxiliaries. The rubber sealing product can be used for high-pressure valve sealing pieces, has excellent rapid gas decompression resistance and is good in sealing effect at a high temperature and a high pressure and long in service life.

Description

technical field [0001] The invention relates to a rubber sealing product and its preparation method and application, in particular to a rubber sealing product for sealing a valve seat and its preparation method and application. Background technique [0002] In the field of non-metallic sealing of valves, non-metallic materials generally refer to plastics, rubber and flexible graphite, etc., and rubber materials have a large number of designs in valve sealing due to their excellent elasticity, obvious compensation for tolerances, and low requirements for processing precision of metal parts. and use. However, the existing rubber materials have unsatisfactory sealing effects under high temperature and high pressure, mainly due to poor wear resistance, low hardness, low strength, large extrusion resistance, high-pressure shearing, and high-temperature and high-pressure liquid or gas. Under environmental conditions, rubber seals are prone to gas rapid pressure release failure. ...

Claims

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Application Information

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IPC IPC(8): C08L15/00C08L27/12C08L77/10C08K13/02C08K3/04F16K5/20
CPCC08K2201/014C08L15/005C08L27/12C08L2205/16F16K5/0663F16K5/201C08L77/10C08K13/02C08K3/04
Inventor 李恩军苟文亮
Owner SHANGHAI REAL SEALING TECH CO LTD
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