Semiconductive roller and production method therefor
US-2015316869-A1 · Nov 5, 2015 · US
Rubber composition, sheet conveying roller, and image forming apparatus
US9637623B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9637623-B2 |
| Application number | US-201414202692-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 10, 2014 |
| Priority date | Mar 29, 2013 |
| Publication date | May 2, 2017 |
| Grant date | May 2, 2017 |
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- Title
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Abstract
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A rubber composition contains a higher ethylene content EPDM and a lower ethylene content EPDM as a rubber component. The proportion of the higher ethylene content EPDM is 30 to 80 mass % based on the overall amount of the rubber component. The rubber composition is less susceptible to reduction in friction coefficient μ and has a proper hardness, a smaller permanent elongation and an excellent abrasion resistance after crosslinking. Therefore, the rubber composition is suitable for a sheet conveying roller and an image forming apparatus incorporating the sheet conveying roller.
First claim
Opening claim text (preview).
What is claimed is: 1. A rubber composition for forming a sheet conveying roller, comprising a rubber component, and a peroxide crosslinking agent, wherein the rubber component consists of: a first portion of an ethylene propylene diene rubber having an ethylene content of not less than 62%; and a second portion of an ethylene propylene diene rubber having an ethylene content of not greater than 55%, wherein the first portion of the ethylene propylene diene rubber is present in a proportion of not less than 30 mass % and not greater than 50 mass % based on an overall amount of the rubber component. 2. The rubber composition according to claim 1 , further comprising a crosslinking assisting agent. 3. The rubber composition according to claim 2 , which provides a crosslinked product having a permanent elongation of not greater than 12%. 4. The rubber composition according to claim 1 , which provides a crosslinked product having a permanent elongation of not greater than 12%. 5. A sheet conveying roller comprising a rubber composition according to claim 1 . 6. An image forming apparatus comprising a sheet conveying roller according to claim 5 .
Assignees
Inventors
Classifications
Chemical properties · CPC title
Feeding devices for picking up or separation of copy sheets · CPC title
Crosslinking · CPC title
Transporting (G03G15/6555 takes precedence) · CPC title
- C08L19/00Primary
Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00 · CPC title
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- What does patent US9637623B2 cover?
- A rubber composition contains a higher ethylene content EPDM and a lower ethylene content EPDM as a rubber component. The proportion of the higher ethylene content EPDM is 30 to 80 mass % based on the overall amount of the rubber component. The rubber composition is less susceptible to reduction in friction coefficient μ and has a proper hardness, a smaller permanent elongation and an excellent…
- Who is the assignee on this patent?
- Sumitomo Rubber Ind
- What technology area does this patent fall under?
- Primary CPC classification C08L19/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 02 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).