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EP0495668A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for producing seamless tube for use as intermediate image-transfer belt

Assignee: Mitsubishi Chemical Corp
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Filing: 1992-01-17
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Granted: —
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Expires: 2012-01-17
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Abstract

Abstract A method for producing a seamless tube for use as an intermediate image-transfer belt, comprising the step of continuously extruding an electrically conductive composition comprising the following components (a), (b) and (c) to form an unstretched seamless tube having a thickness of 50 to 1000 µm and a sheet resistance of 10⁵ to 10¹³ Ω/□: (a) a thermoplastic aromatic polycarbonate resin, (b) a thermoplastic poly(alkylene terephthalate) resin and (c) acetylene black, the amount of the component (a) being from 60 to 95 wt.% of the total weight of the component (a) and the component (b) the amount of the component (b) being from 40 to 5 wt.% of the total weight of the component (a) and the component (b), and the amount of the component (c) being from 10 to 25 parts by weight for 100 parts by weight of the total amount of the component (a) and the component (b).

Inventors

  • 👤 Katsumi c/o Mitsubishi Petrochem. Co.Ltd Oruyama
  • 👤 Makoto c/o Mitsubishi Petrochem.Co.Ltd Morikoshi
  • 👤 Toshihiko c/o Mitsubishi Petroch.Co.Ltd Tanimoto
  • 👤 Michiya c/o Mitsubishi Petrochem. Co.Ltd Okamura
  • 👤 Hideto c/o Mitsubishi Petrochem. Co. Ltd Shimizu

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 13:36
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/006; G03G7/0066; G03G15/00; G03G15/14; G03G15/16; G03G15/1605; G03G15/162; G03G7/0073; G03G7/008

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 151 words
A method for producing a seamless tube for use as an intermediate image-transfer belt, comprising the step of continuously extruding an electrically conductive composition comprising the following components (a), (b) and (c) to form an unstretched seamless tube having a thickness of 50 to 1000 µm and a sheet resistance of 10⁵ to 10¹³ Ω/□: (a) a thermoplastic aromatic polycarbonate resin, (b) a thermoplastic poly(alkylene terephthalate) resin and (c) acetylene black, the amount of the component (a) being from 60 to 95 wt.% of the total weight of the component (a) and the component (b) the amount of the component (b) being from 40 to 5 wt.% of the total weight of the component (a) and the component (b), and the amount of the component (c) being from 10 to 25 parts by weight for 100 parts by weight of the total amount of the component (a) and the component (b).
Claim 2
Dependent Claim 14 words
The method according to claim 1, wherein the polycarbonate resin (a) is a bisphenol.
Claim 3
Dependent Claim 21 words
The method according to claim 1 or 2, wherein the polycarbonate resin (a) has a molecular weight of 22,000 to 33,000.
Claim 4
Dependent Claim 25 words
The method according to claim 1, 2 or 3, wherein the polycarbonate resin (a) has a melt flow rate of 0.5 to 5 g/10 min.
Claim 5
Independent Claim 21 words
The method according to any one of the preceding claims, wherein the poly(alkylene terephthalate) resin (b) is a poly(butylene terephthalate) resin.
Claim 6
Independent Claim 34 words
The method according to any one of the preceding claims, wherein the acetylene black (c) has a particle size of 50 to 950 Å and a specific surface area of 20 to 100 m²/g.

References Cited (Backward Citations)

DE3229156A1 Cited
US4606955A Cited
EP0332223A2 Cited

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