专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0550490A MANUFACTURE OF FILM LIKE CYLINDRICAL BODY 失效
公开(公告)号：JPH0550490A
公开(公告)日：1993-03-02
申请号：JP20819391
申请日：1991-08-20
申请人： GUNZE KK , ONO SEISAKUSHO KK
发明人： TANAKA AKIHIRO , KANETAKE JUNYA , NISHIURA NAOKI , WAKINAKA SATOSHI , ONO HIROYUKI , SUMI MASANORI
IPC分类号： B29C48/90
摘要： PURPOSE:To obtain an excellent seamless film like cylindrical body having no fold. CONSTITUTION:A tubular film 20 is extruded from an annular die and molded in a vacuum molding tank 4 so as to have a predetermined diameter. In this case, the temp. control tank 24 of the tubular film 20 is provided to the front stage of a sizing sleeve 21. The tubular film 20 is gradually cooled by the temp. control tank 24 and subsequently sent to the sizing sleeve 21 to be subjected to vacuum molding by suction force.

2. 发明专利

JP2002018873A REINFORCED POLYIMIDE ENDLESS TUBULAR FILM, METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR USING THE SAME 失效
公开(公告)号：JP2002018873A
公开(公告)日：2002-01-22
申请号：JP2000209567
申请日：2000-07-11
申请人： GUNZE KK
发明人： NISHIURA NAOKI
IPC分类号： G03G15/16 , B29C41/04 , C08J5/18 , C08K3/04 , C08L79/08
摘要： PROBLEM TO BE SOLVED: To provide a polyimide endless tubular film which is more excellent in durability and of which the end is reinforced. SOLUTION: The reinforced polyimide endless tubular film is formed from a single layer of a polyimide resin so that one end or both ends thereof are thicker than the central part thereof. Each end is formed outside or inside and has various shapes. This film is manufactured by using, for example, a metal drum to supply a polyimide raw liquid to the inner surface of the metal drum in a mist form at a rotational speed of substantially non-centrifugal force to mold and heat the same. Even if conductive carbon black is mixed with the polyimide raw liquid, the film is manufactured in the same way. Since stable semi-conductivity is imparted to the film, this film is effectively used, for example, as an intermediate transfer belt or paper feed belt of a color copier.

3. 发明专利

JPH10217321A MOLDING METHOD OF COMPOSITE MATERIAL 失效
公开(公告)号：JPH10217321A
公开(公告)日：1998-08-18
申请号：JP13150693
申请日：1993-04-21
申请人： GUNZE KK
发明人： TANAKA AKIHIRO , NISHIURA NAOKI , WAKINAKA SATOSHI
IPC分类号： B29C49/20 , B29C49/26 , B29D23/00 , B29K27/12 , B29K79/00 , B29K105/08 , B29L9/00 , B29L23/00 , B29L31/30 , B29L31/34 , B29L31/52
摘要： PURPOSE: To make it easy to mold a composite material by inserting a high- temperature thermoplastic tubular film into prepreg placed on the inside face of a mold for heating and expanding, and bonding the prepreg to the inner face through its internal pressure. CONSTITUTION: Prepreg 2 is arranged on a part constituting the cylindrical inner perimeter of an open two-split mold 1. After the mold is closed, a high- temperature thermoplastic tubular film 3, with its one end sealed 4, is inserted into the mold. The opening end of the tubular film 3 is connected to a gas, such as air or the like, encapsulating opening 5. Next, while the mold is heated for softening the resin impregnated in the prepreg 2, gas such as air or the like is blown and press-fitted into the tubular film 3 through an appropriate method for heating expanding. Through the internal pressure of the tubular film 3, the prepreg 2 is bonded to the inner perimeter of the mold 1.

4. 发明专利

JPH10120805A THERMALLY CONDUCTIVE POLYIMIDE FILM, ITS PRODUCTION AND ITS USE 失效
公开(公告)号：JPH10120805A
公开(公告)日：1998-05-12
申请号：JP29963296
申请日：1996-10-23
申请人： GUNZE KK
发明人： MIYAMOTO TSUNEO , KURAOKA TAKASHI , KANETAKE JUNYA , NISHIURA NAOKI , KOBAYASHI NOBUAKI , SADAMITSU TETSUO
IPC分类号： C08J5/18 , B29C39/08 , B29C41/04 , B29D7/01 , B29K79/00 , B29L7/00 , B29L24/00 , B32B27/30 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To produce a polyimide film having a high thermal conductivity while avoiding, as much as possible, deterioration of mechanical characteristics, etc., inherent in polyimide by subjecting a thermally conductive powder to centrifugal casting to form a gradient dispersion. SOLUTION: A polyimide precursor film in an endless cylindrical form is obtained by the centrifugal casting of a polyimide precursor solution containing 10-30wt.%, on a solid basis, of at least one thermally conductive ceramic powder which is selected from the group of inorganic substance powders having high thermal conductivity consisting of boron nitride, aluminum oxide, beryllium oxide and aluminum nitride and which has a volume resistivity of at least 1,013Ω.cm and a particle diameter of 0.1-3.0μm. The obtained film is heated to 300-450 deg.C to effect imide ring closure, thus giving a thermally conductive polyimide film wherein the thermally conductive powder forms a gradient dispersion in the film. The polyimide film preferably comprises a thermosetting aromatic polyimide.

5. 发明专利

JPH08176319A CYLINDRICAL POLYIMIDE FILM AND ITS PRODUCTION 失效
公开(公告)号：JPH08176319A
公开(公告)日：1996-07-09
申请号：JP32112894
申请日：1994-12-26
申请人： GUNZE KK
发明人： NISHIURA NAOKI , KANETAKE JUNYA , MIYAMOTO TSUNEO , KURAOKA TAKASHI
IPC分类号： G03G15/16 , C08J5/18 , C08L79/08 , C08L101/00 , G03G7/00
摘要： PURPOSE: To obtain a cylindrical polyimide film having excellent heat resistance and mechanical characteristics, further having both a dielectric property and a semi-conductive property, and useful as an endless member for transferring toners, by centrifugally casting a raw material solution under a specific condition. CONSTITUTION: A raw material solution (having a viscosity of 100-1500cps) comprising (A) 5-35 pts.wt. of a dielectric inorganic powder material (preferably having a specific gravity of 3-10g/cm ), (B) 3-30 pts.wt. of conductive carbon black, and (C) 35-92 pts.wt. (solid content) of a polyamic acid is centrifugally cast, and the obtained cylindrical polyamic acid film is subjected to a thermal imide ring-forming reaction to obtain the objective film in which the component A and the component B are mainly dispersed in the polyimide resin at places near to the outer surface and at other parts, respectively. The surfaces of non- outer surface parts have preferably surface electric resistance values of 10 to 10 Ω/square.

6. 发明专利

JPH06202513A FIXING DEVICE 失效
公开(公告)号：JPH06202513A
公开(公告)日：1994-07-22
申请号：JP36209492
申请日：1992-12-28
申请人： GUNZE KK
发明人： OKAMOTO TOSHINORI , NISHIURA NAOKI
IPC分类号： G03G15/20 , H05B3/20
摘要： PURPOSE:To decrease a thermal capacity and to drastically shorten warming-up time by using a seamless belt heater consisting of an org. high-polymer material as a heating section. CONSTITUTION:The heating section A has the seamless belt heater 4 consisting of the org. high-polymer material (more preferably polyimide resin) contg. conductive fillers, an energizing roll 5 for driving the seamless belt heater 4 and supplying current to the seamless belt heater 4 and a tension roll 6. On the other hand, a compressing section B has a press roll 3 which comes into contact with the energizing roll 5 via the seamless belt heater 4 and holds and presses paper 2 transferred with toners 1. The seamless belt heater 4 is preferably a film consisting of the conductive polyimide resin having >=200 deg.C heat resistance, small thermal shrinkage at 200 deg.C (more preferably =1000kg/cm tensile strength.

7. 发明专利

JP2002178346A CYLINDRICAL FILM AND ITS PRODUCTION METHOD 审中-公开
公开(公告)号：JP2002178346A
公开(公告)日：2002-06-26
申请号：JP2001377585
申请日：2001-12-11
申请人： GUNZE KK
发明人： KURAOKA TAKASHI , KANETAKE JUNYA , NISHIURA NAOKI , MIYAMOTO TSUNEO , KOBAYASHI NOBUAKI
IPC分类号： B29C41/04 , B29C33/42 , B29C61/00 , B29C71/00 , B29K79/00 , B29L23/00
摘要： PROBLEM TO BE SOLVED: To provide a secondary molding of a precursor of a thermosetting resin which is free from deformation such as expansion and distortion, etc., which regard to an endless tubular film of the precursor which needs secondary molding by heating and a method for producing the secondary molding. SOLUTION: The endless cylindrical film high in quality and performance can be obtained by secondary molding. A cylindrical film of the precursor of the thermosetting resin which is molded primarily by centrifugal casting is engaged externally with a tubular mold for secondary molding. Numbers of minute through holes of 0.1-2 mm bore diameter are formed on the periphery.

8. 发明专利

JP2001347593A ABRASION-RESISTANT SEMICONDUCTIVE POLYIMIDE FILM, METHOD FOR MANUFACTURING THE SAME AND USAGE OF THE SAME 失效
公开(公告)号：JP2001347593A
公开(公告)日：2001-12-18
申请号：JP2000172403
申请日：2000-06-08
申请人： GUNZE KK
发明人： NISHIURA NAOKI , NODA KAZUHIRO
IPC分类号： B65H5/02 , B05D3/10 , B05D5/00 , B05D7/04 , B05D7/24 , B32B9/00 , B32B27/34
摘要： PROBLEM TO BE SOLVED: To provide an abrasion-resistant semiconductive polyimide film especially having electric resistance characteristics stable over a long period of time and also having high abrasion resistance and proper hydrophilicity. SOLUTION: The abrasion-resistant semiconductive polyimide film is obtained by coating the surface of a semiconductive polyimide film (which may have a rubber elastic layer), wherein the difference between a volume resistance value and a surface resistance value is within two figures, with a transparent membrane layer comprising silicon oxide. The membrane layer (thickness: about 100-1,500 Å) is preferably formed by a sputtering method using silicon oxide (e.g.; silicon dioxide) as a target. A semiconductive endless tubular film obtained from the abrasion-resistant semiconductive polyimide film is effectively used, for example, as the paper feeding or intermediate transfer belt of a wet copier.

9. 发明专利

JP2001260151A ENDLESS TUBULAR FILM AND USE THEREOF 失效
公开(公告)号：JP2001260151A
公开(公告)日：2001-09-25
申请号：JP2000072763
申请日：2000-03-15
申请人： GUNZE KK
发明人： NISHIURA NAOKI
IPC分类号： G03G5/10 , B29C41/04 , B29C41/52 , C08J5/18 , C08K3/04 , C08L79/08 , C08L101/00
摘要： PROBLEM TO BE SOLVED: To provide an endless tubular film especially improved in thickness accuracy in its lateral direction and inorganic additive dispersibility and having still more excellent characteristics, and a use method thereof. SOLUTION: The endless tubular film is formed by molding a polymer liquid A, to which no inorganic additive is added, into an endless tubular shape in a rotating molding drum under a condition represented by expression:2.5>=(specific gravity of polymer liquid A)×ω2×r/Va (wherein, Va is the viscosity of the polymer liquid A, r is the inner radius of the molding drum and ω is the angular velocity of the molding drum) and drying the molded tubular film under heating. The endless tubular film is formed by molding a polymer liquid B, to which an inorganic additive is added, in the same way under a condition represented by expression:2.5>=(true specific gravity of inorganic additive)×ω2×r/Vb (wherein, Vb is the viscosity of the polymer liquid B, r is the inner radius of the molding drum and ω is the angular velocity of the molding drum) and drying the molded tubular film under heating. A polyimide endless tubular film containing a conductor CB is used as an intermediate transfer belt of a color copier.

10. 发明专利

JP2000263568A THERMAL DEFORMATION RESISTANT TUBULAR FILM AND ITS USE 失效
公开(公告)号：JP2000263568A
公开(公告)日：2000-09-26
申请号：JP6939399
申请日：1999-03-16
申请人： GUNZE KK
发明人： NISHIURA NAOKI , KURAOKA TAKASHI , KANETAKE JUNYA , YOSHIDA TSUTOMU , MIYAMOTO TSUNEO
IPC分类号： B29C41/04 , B29C41/08 , B29K77/00 , B29L7/00 , B29L29/00 , F16G1/00 , F16G1/14 , G03G15/16 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a low thermal deformation, good quality and productivity, a high accuracy and a small change in an electric resistance by injecting a powder spray-like heat resistant resin liquid in a mold drum to mold at a rotary speed of no centrifugal force. SOLUTION: A heat resistant resin liquid obtained by dissolving a thermoplastic or thermosetting resin such as a polyphenylene sulfide or the like in an organic solvent is formed in a powder spray state, injected in a mold drum at a rotary speed of no centrifugal force and molded. The rotary speed of no centrifugal force means a rotary speed without casting the liquid of a coating state injected in the drum. In this case, the liquid instantaneously brought into close contact with a surface of the drum by an injection force is molded in a high thickness accuracy at a slow rotating speed without centrifugal force. A size and a thickness of the product can be easily molded from thin to thick one without large influence only by changing a viscosity of the liquid. Thus, the product can be easily molded with excellent thermal deformation characteristics, small change of electric resistance characteristics with time, a short molding time, and a high accuracy.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式