公开(公告)号：JPH0445529B2

公开(公告)日：1992-07-27

申请号：JP5458587

申请日：1987-03-10

Applicant: TORAY INDUSTRIES

Inventor： ABE KOICHI ,  NISHINO SATOSHI ,  NAKAJIMA SHOJI

IPC: C08J5/18 ,  B29C55/12 ,  B29K67/00 ,  B29K105/00 ,  B29L7/00 ,  C08K7/04 ,  C08L67/00 ,  C08L67/02

公开(公告)号：JPH04130139A

公开(公告)日：1992-05-01

申请号：JP25129090

申请日：1990-09-19

Applicant: TORAY INDUSTRIES

Inventor： MINAMIZAWA HIDEHITO ,  NISHINO SATOSHI ,  ABE KOICHI

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  C08K3/26 ,  C08K7/16 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To obtain a polyester film having a high resistance to high-speed scratching and suffering little degradation even in a high-speed dubbing by incorporating a specified amt. of CaCO3 comprising ellipsoidal particles having a specified flatness and a specified mean diameter and specifying the thickness orientation index. CONSTITUTION:A polyester film which contains 0.002-10wt.% powdered CaCO3 comprising ellipsoidal particles having a flatness in the film of higher than 1.5 and lower than 10 and a mean diameter of 0.01-5mum and in which the thickness orientation index is 1.2 or lower is prepd. The film has a high resistance to high-speed scratching during film processing or in the use as a final product, shows excellent high-speed dubbing properties when used as a magnetic tape, and hence is useful as a base film for a magnetic recording medium.

公开(公告)号：JPH03232178A

公开(公告)日：1991-10-16

申请号：JP2783290

申请日：1990-02-07

Applicant: TORAY INDUSTRIES

Inventor： NISHINO SATOSHI ,  ABE KOICHI ,  MINAMIZAWA HIDEHITO

IPC: G11B23/087 ,  C09D5/23 ,  C09D7/12 ,  G11B5/73 ,  G11B5/733 ,  G11B15/60

Abstract: PURPOSE:To achieve the video tape cassette that is superior in both dropout resistance and traveling property by making a guide pin out of a specified material and structuring a video tape with a base film containing specified particles. CONSTITUTION:The guide pin is in the video tape cassette, and is in contact with the video tape on its nonmagnetic surface side. In this case, the guide pin is made of resin, and the video tape contains organic particles in its base film. Thus, by making the guide pin out of a specified material and structuring the video tape with its base film containing specified particles, no abrasion takes place on the guide pin and the base film with each other, and the video tape cassette having superior in drop-out resistance and traveling properties can be obtained.

公开(公告)号：JPH03209624A

公开(公告)日：1991-09-12

申请号：JP521790

申请日：1990-01-12

Applicant: TORAY INDUSTRIES

Inventor： OKAZAKI IWAO ,  ABE KOICHI ,  NISHINO SATOSHI

IPC: G11B23/087 ,  C09D5/23 ,  C09D7/12 ,  C09D123/00 ,  C09D123/02 ,  G11B5/73 ,  G11B5/733

Abstract: PURPOSE:To enhance scratch resistance, output characteristics, etc., by using guide pins of specific surface roughness, using thermoplastic resins contg. particles as a base material film and specifying the content, thereof, etc. CONSTITUTION:This video tape has a tape provided with a magnetic layer on one surface of the material film and the guide pins. The surface roughness Rt of the guide pins is 0.005 to 10mum. The base material film is a laminated film formed by laminating a layer (layer A) consisting of the thermoplastic resin A contg. the particles on at least one surface of a layer (layer B) consisting of the thermoplastic resin. The surface roughness Ra of the layer A is

公开(公告)号：JPH02286721A

公开(公告)日：1990-11-26

申请号：JP10733389

申请日：1989-04-28

Applicant: TORAY INDUSTRIES

Inventor： NISHINO SATOSHI ,  MINAMIZAWA HIDEHITO ,  ABE KOICHI

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  C08K3/00 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To improve the scratch resistance of the surface and the abrasion resistance to chipping or the like by forming a biaxially oriented polyester film containing internally deposited particles and inert particles specified in a mean particle diameter, a Mohs hardness and a content. CONSTITUTION:A biaxially oriented polyester film containing internally deposited particles and inert particles A, wherein the particle A has a mean primary particle diameter of 0.002-0.25mu, a Mohs hardness >=7 and a content of 0.02-5wt.%. The polyester has at least one kind of a structure selected from among units of ethylene terephthalate, ethylene alpha,beta-bis(2-chlorophenoxy) ethane-4,4'-dicarboxylate and ethylene 2,6-naphthalate as the main structural component. A polyester having ethylene terephthalate units as the principal structural component is particularly desirable because of its better scratch resistance.

公开(公告)号：JPH02214736A

公开(公告)日：1990-08-27

申请号：JP3512289

申请日：1989-02-16

Applicant: TORAY INDUSTRIES

Inventor： NISHINO SATOSHI ,  MINAMIZAWA HIDEHITO ,  ABE KOICHI

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08G63/18 ,  C08J5/18 ,  C08K3/00 ,  C08K7/00 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To provide the subject film containing specific amounts of two specific kinds of particles, having excellent scratch resistance and abrasion resistance and suitable as a base film for magnetic tape, packaging film and film for various industrial materials. CONSTITUTION:The objective film contains two kinds of particles A and B. The particle A has an average particle diameter of 5-300nm and its content in the film is 0.1-2wt.%. The particle B has an average particle diameter of 30-2,000nm and its content in the film is 0.005-0.5wt.%. The concentration of the particle A in the vicinity of the particle B is higher than the concentration in the other region. The surface resistivity of the film is preferably OMEGA.cm.

公开(公告)号：JPH02129232A

公开(公告)日：1990-05-17

申请号：JP28306688

申请日：1988-11-09

Applicant: TORAY INDUSTRIES

Inventor： FUKUYAMA TAKEO ,  ABE KOICHI ,  NISHINO SATOSHI

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  C08K3/22 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To obtain a biaxially oriented polyester film with excellent scratch resistance and shaving resistance of the film surface by using a specified amt. of rutile titanium dioxide particles with a specified particle shape. CONSTITUTION:This biaxially oriented polyester film contains 0.05-5wt.% rutile titanium dioxide particle with an average particle diameter of 0.05-2mum and a sphericity coefficient of 0.8-1. It is pref. that the degree of flatness of the surface projection of said polyester film is 7-16, because the scratch resistance and shaving resistance are improved thereby. It is pref. that ethylene terephthalate is a main constituting component as the polyester film, because the slipperiness, scratch resistance and shaving resistance of the film are further improved thereby.

公开(公告)号：JPH0284445A

公开(公告)日：1990-03-26

申请号：JP15994089

申请日：1989-06-22

Applicant: TORAY INDUSTRIES

Inventor： MIMURA TAKASHI ,  TSUNASHIMA KENJI ,  NISHINO SATOSHI

IPC: C08J7/04 ,  B32B27/36 ,  C08L67/02 ,  G11B5/73 ,  G11B5/733

Abstract: PURPOSE:To obtain the subject film excellent in transparency, smoothness, etc., by laminating a coating layer consisting of a water-soluble or water- dispersible resin containing specified organic polymer particles as the main component on one or both sides thereof. CONSTITUTION:A coating layer consisting of a water-soluble or water-dispersible resin (preferably polyester-based copolymer, etc.) containing 0.1-20wt.% organic polymer particles [preferably styrene-divinylbenzene (crosslinked)copolymer] with active groups such as OH on the surface thereof having 0.08-2.0mum average diameter,

公开(公告)号：JPH01230642A

公开(公告)日：1989-09-14

申请号：JP5762488

申请日：1988-03-10

Applicant: TORAY INDUSTRIES

Inventor： ABE KOICHI ,  NISHINO SATOSHI ,  SUZUKI MASARU

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  C08K3/20 ,  C08L67/00 ,  C08L67/02 ,  G11B5/73 ,  G11B5/733

Abstract: PURPOSE:To make it possible to improve the scratch resistance and dubbing resistance by specifying the distribution of the heights of surface protrusions and the crystalline index according to total reflection Raman spectroscopy of the film surface in specified ranges by using WO3 particles of a mean particle diameter in a specified range. CONSTITUTION:This biaxially oriented film is based on a composition comprising a polyester (one mainly consisting of ethylene terephthalate units is particularly desirable) and WO3 particles, wherein the mean particle diameter of said WO3 particles in the film is 0.1-0.6mum, the crystalline index according to total reflection Raman spectroscopy of at least either surface of the film is 14cm or above, preferably, 16cm or above, and the standard deviation of the distribution of the surface protrusions is 30-200nm, preferably, 50-120nm. This film is scarcely scratched even when it runs at a high speed, does not suffer any decrease in image quality even after dubbing and is particularly useful for videotaping.

公开(公告)号：JPH01207329A

公开(公告)日：1989-08-21

申请号：JP3147088

申请日：1988-02-13

Applicant: TORAY INDUSTRIES

Inventor： NISHINO SATOSHI ,  MINAMIZAWA HIDEHITO ,  ABE KOICHI

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  C08K5/5419 ,  C08L67/02 ,  G11B5/73 ,  G11B5/733

Abstract: PURPOSE:To obtain the title film suitable for packaging, condenser and base film of magnetic tape, etc., having excellent resistance to wear and runnability, containing particles of specific type and having specific range of standard deviation of height of the surface protrusion. CONSTITUTION:The aimed film contains silicone elastomer particles (preferably 0.1-5mum average particle diameter, 0.001-1.0wt.% content of the particles and elastic modulus) and has =25wt.% of the silicone elastomer particle component is bifunctional organopolysiloxane.