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Large-scale hydrogenated nitrile butadiene skeleton oil seal, and preparation method and application thereof

A technology of hydrogenated nitrile butadiene, skeleton oil seal, applied in the direction of adhesive type, rubber-derived adhesive, adhesive additive, etc., can solve the problem of unguaranteed bonding reliability, and achieve good bonding reliability and lip pressure change. Small, the effect of improving the production qualification rate

Active Publication Date: 2013-11-27
广州国机密封科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent only uses a formula of hydrogenated nitrile rubber to prepare rotary seals, which meets the requirements of low friction, but the bonding reliability cannot be guaranteed

Method used

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  • Large-scale hydrogenated nitrile butadiene skeleton oil seal, and preparation method and application thereof
  • Large-scale hydrogenated nitrile butadiene skeleton oil seal, and preparation method and application thereof
  • Large-scale hydrogenated nitrile butadiene skeleton oil seal, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment S-1

[0071] Example S-1: The adhesive rubber mixed rubber was thinly passed on an open mill into 0.5-1.0 mm thin slices, which were divided into thin strips of fixed width. If it is an internal skeleton oil seal, wrap the pre-treated skeleton repeatedly with thin rubber strips. If it is an outer frame oil seal, attach the thin rubber strip to the surface of the frame coated with adhesive.

Embodiment S-2

[0072] Example S-2: The adhesive glue was thinly passed on an open mill into 0.5-1.0 slices, cut into pieces and added to the mixer with methyl ethyl ketone, soaked for 3 to 5 hours statically, and stirred for 2 to 4 hours to obtain a uniform adhesive glue. The mass ratio of adhesive glue and methyl ethyl ketone is 1:4 to 4.5. The obtained adhesive glue was coated on the pretreated frame, dried naturally and dried at 80°C for 10 minutes.

[0073] The preparation and product performance of large-scale oil seal products are shown in Table 2 in Examples 1 to 3 and Comparative Examples 1 to 4. In addition, the lip glue is produced on an open mill and a thin strip of 0.5 to 1.0 mm is produced on the extruder. Adhesive strips. Cover or wrap the frame with adhesive glue on a thin strip. Put the skeleton and lip rubber strips into a vulcanizing mold, and vulcanize on a flat vulcanizer at 145~155℃ for 15~25 minutes. After trimming the flash, after vulcanizing at 130~150℃ for 2~4 hours, ...

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Abstract

The invention discloses a large-scale hydrogenated nitrile butadiene skeleton oil seal, and a preparation method and application thereof. The large-scale hydrogenated nitrile butadiene skeleton oil seal provided by the invention is a skeleton oil seal with an internal diameter greater than 400 mm, and comprises a metal skeleton, an oil seal body and a self-tightening helical spring. The oil seal body comprises a lip glue layer and an adhesive glue layer. The adhesive glue is applied with the metal skeleton through a binding bar wrapping or adhesive cement coating process, and is finally vulcanized with lip gel by mould pressing, so as to obtain the hydrogenated nitrile butadiene skeleton oil seal. The large-scale hydrogenated nitrile butadiene skeleton oil seal involved in the invention has strong reliability, good wear resistance of lip and long service life, and can be applied to the field of sealing of high speed rotary bearing.

Description

Technical field [0001] The invention belongs to the field of sealing products, and particularly relates to a large-scale hydrogenated butyronitrile skeleton oil seal and a preparation method and application thereof. Background technique [0002] The skeleton oil seal seal prevents the leakage of bearing lubricating oil through the contact between the flexible rubber sealing lip and the shaft. The lip part and the skeleton bonding part are the two key parts of the skeleton oil seal. Hydrogenated nitrile rubber (HNBR) is a highly saturated elastomer obtained by special hydrogenation of nitrile rubber. It has excellent oil resistance, heat resistance, chemical corrosion resistance, ozone resistance, high compression and permanent deformation resistance, and also has high strength, high tearing performance, excellent wear resistance, etc. It is a comprehensive performance One of the excellent rubbers is also one of the commonly used rubber materials for skeleton oil seals. Hydrogen...

Claims

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Application Information

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IPC IPC(8): B29B7/00B29C35/00C08L15/00C08K13/02C08K3/04C08K3/22C08K5/09C08K5/18C08K5/378C09J115/00C09J11/04C09J11/06
Inventor 肖风亮袁维娜陈翔
Owner 广州国机密封科技有限公司
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