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1.发明专利
公开(公告)号：JP2002210765A
公开(公告)日：2002-07-30
申请号：JP2001015473
申请日：2001-01-24
Applicant: TORAY INDUSTRIES
Inventor： KUROSAWA AYAHIRO , YONEYAMA WASUKE
Abstract: PROBLEM TO BE SOLVED: To provide a film not generating pinholes, which is a problem peculiar to solution film forming, in its surface and a method for manufacturing the same. SOLUTION: The solution forming film low in the generation frequency of pinholes is characterized by that the thickness of the product film measured by an electronic microthickness meter is not more than 5 μm and the number of pinholes of 100 μm or more in the product film is 1 or less per 1,000 m2. In manufacturing the solution film, the temperature Tatm of an atmosphere coming into contact with the solvent of a polymer solution and the temperature Tex of a solvent exhaust port satisfy Tex-100
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公开(公告)号：JP2000011363A
公开(公告)日：2000-01-14
申请号：JP17759798
申请日：1998-06-24
Applicant: TORAY INDUSTRIES
Inventor： ITO NOBUAKI , YONEYAMA WASUKE
Abstract: PROBLEM TO BE SOLVED: To improve productivity by forming a magnetic layer on the surface of an aromatic polyamide film having equal to or below a specific slack quantity under a specific condition to prevent the deformation due to heat or the like to secure smoothness and to improve travelling property. SOLUTION: The deformation of the film caused by separating from a supporting body such as a drum at the time of vapor depositing the magnetic layer and the damage of the film caused by the poor contacting with a guide roll at the time of travelling are prevented by providing the magnetic layer on the surface of the aromatic polyamide film having
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公开(公告)号：JPH0957772A
公开(公告)日：1997-03-04
申请号：JP22044895
申请日：1995-08-29
Applicant: TORAY INDUSTRIES
Inventor： ITO NOBUAKI , YONEYAMA WASUKE , TSUKUDA AKIMITSU
Abstract: PROBLEM TO BE SOLVED: To provide a method to manufacture a film formed using a solution with such advantages as the non-generation of creases during separation, the minimization of the meandering action of a belt and the highly stable formation of a film. SOLUTION: In the method to manufacture a film formed by stretching the flow of a polymer solution on a support, the support is endless belt, and the welded joint angle of the endless weld is 88 deg. or more to 90 deg. or less with the direction in which the belt is moved forward. In addition, the amount of the edge bend of the belt is 20mm or less on both sides.
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公开(公告)号：JPH0825221B2
公开(公告)日：1996-03-13
申请号：JP6351991
申请日：1991-03-27
Applicant: TORAY INDUSTRIES
Inventor： YONEYAMA WASUKE , ITO NOBUAKI
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公开(公告)号：JP2003112844A
公开(公告)日：2003-04-18
申请号：JP2001309952
申请日：2001-10-05
Applicant: TORAY INDUSTRIES
Inventor： KUROSAWA AYAHIRO , YONEYAMA WASUKE
IPC: B65H43/08 , B65H23/195 , B65H35/02
Abstract: PROBLEM TO BE SOLVED: To provide a sheet material manufacturing method allowing less wrinkles of sheet materials, if wider and thinner, due to hardness irregularity on a product roll surface layer resulting from fixed thickness distribution occurring in the cross direction of the sheet materials. SOLUTION: The sheet material manufacturing method comprises a step of edge-trimming and winding the sheet materials where the sheet materials are edge-trimmed in trimming grooves provided in the surface of a trimming roll at both ends and wound with edge trimming cutters, the trimming roll and a sheet material winding roll being oscillated perpendicularly to the travelling direction of the sheet materials with an amplitude of 5 mm to 200 mm.
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Patent Agency Ranking
公开(公告)号：JP2000256485A
公开(公告)日：2000-09-19
申请号：JP6021699
申请日：1999-03-08
Applicant: TORAY INDUSTRIES
Inventor： ITO NOBUAKI , YONEYAMA WASUKE
Abstract: PROBLEM TO BE SOLVED: To obtain an aromatic polyamide film used to form a magnetic recording medium small in damages of the end surface which satisfies a specified relationship between the loss modulus at a specified temperature in the direction of width and that at a specified high temperature. SOLUTION: This is an aromatic polyamide film containing at least 50 mol% repeating units represented by formula I or II and satisfying the relationships: E"(50)>E"(150) [wherein E"(50) is the loss modulus at 50 deg.C in the direction of width, and D"(150) is that at 150 deg.C in the direction of width]. It is desirable that the film contains 0-1 wt.% inorganic particles having a particle diameter of 10-200 nm and that the rate of the inorganic-particle-containing layer is at least 50%. When the film is used as a film, it has a thickness of 1-8 μm. A magnetic recording medium is made by applying a magnetic coating material comprising a ferromagnetic powder such as an iron oxide having a particle diameter of at most 0.3 μm and a thermosetting or radiation-curable binder to at least either surface of such film. In the formula, Ar1 to Ar3 are each a group of formula III or IV (wherein X and Y are each -O-, -CH2-, -CO-, -SO2-, or the like) or the like.
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公开(公告)号：JPH08118829A
公开(公告)日：1996-05-14
申请号：JP25556494
申请日：1994-10-20
Applicant: TORAY INDUSTRIES
Inventor： ITO NOBUAKI , YONEYAMA WASUKE , TSUKUDA AKIMITSU
Abstract: PURPOSE: To obtain a thermal transfer body superior in running properties even under a high-temperature and-humidity environment and free from sticking and a head contamination. CONSTITUTION: In a transfer body for thermal recording formed by providing a thermal transfer layer on one surface of a substrate film made of aromatic polyamide, the substrate film has a Young's modulus of 700kg/mm or more at least in one direction and contains 0.5%, or less methylene chloride extract.
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公开(公告)号：JPH0887737A
公开(公告)日：1996-04-02
申请号：JP21967694
申请日：1994-09-14
Applicant: TORAY INDUSTRIES
Inventor： ITO NOBUAKI , TSUKUDA AKIMITSU , YONEYAMA WASUKE
Abstract: PURPOSE: To provide a film excellent in heat resistance, running performance and durability. CONSTITUTION: A magnetic layer is formed on one side of a base film of arom. polyamide to obtain the objective magnetic recording medium. The base film has >=700kg/mm Young's modulus in at least one direction, contains of the film in the longitudinal direction.
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公开(公告)号：JPH0855327A
公开(公告)日：1996-02-27
申请号：JP19040394
申请日：1994-08-12
Applicant: TORAY INDUSTRIES
Inventor： YONEYAMA WASUKE , TSUKUDA AKIMITSU , ITO NOBUAKI
Abstract: PURPOSE:To obtain a magnetic recording medium excellent in durability, travelling property and output characteristics by using a base film having a three- layer structure comprising aromatic polyamide, specifying the particle size of the center layer and the thickness of the surface layer, and specifying the dimensional changing rate under load. CONSTITUTION:The base film consists of layers (A) and layer (B) in such a manner that both surfaces of the layer (B) are coated with layers (A) containing inactive particles. It is necessary that when 1kg load per 1mm in the longitudinal direction of the base film is added, the dimensional changing rate at 100 deg.C for 10min is
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公开(公告)号：JP2000353311A
公开(公告)日：2000-12-19
申请号：JP16461899
申请日：1999-06-11
Applicant: TORAY INDUSTRIES
Inventor： ITO NOBUAKI , YONEYAMA WASUKE
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium which hardly shows decrease in the output even when the medium is repeatedly used. SOLUTION: The aromatic polyamide film consists of at least three layers A, B, C. The average particle size dA, dB, dC of the fine particles in the respective layers are in the relation of dA
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