公开(公告)号：JPH06145376A

公开(公告)日：1994-05-24

申请号：JP29871692

申请日：1992-11-09

Applicant: TORAY INDUSTRIES

Inventor： FUKUYAMA TAKEO ,  HIRAOKA TOSHIHIKO ,  KUROME TAIICHI

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  B29L9/00 ,  B32B7/02 ,  B32B27/36 ,  C08J5/18 ,  G03C1/795

Abstract: PURPOSE:To obtain a polyester film which is excellent in transparency, water absorbency, mechanical characteristics and heat resistance and which, when utilized as a photographic material base or cover layer, can be made thinner than the conventional TAC film and makes it possible to realize smaller photographic equipment, higher unrolling speed, etc. CONSTITUTION:A polyester film having a vapor permeability of at most 15.0g/ m .24hr/0.1mm, a moisture content of at most 1.5wt.%, and a curl recovery of at least 70%; and a photographic material made by using the polyester film as the base.

公开(公告)号：JPH04278349A

公开(公告)日：1992-10-02

申请号：JP6378391

申请日：1991-03-06

Applicant: TORAY INDUSTRIES

Inventor： OKAZAKI IWAO ,  FUKUYAMA TAKEO ,  ABE KOICHI

IPC: B29C55/12 ,  B29K67/00 ,  B29L9/00 ,  B32B7/02 ,  B32B27/20 ,  B32B27/36 ,  C08L67/02 ,  G11B5/73 ,  G11B5/733

Abstract: PURPOSE:To enhance high speed cutting properties and electromagnetic conversion characteristics in high speed magnetic field transfer or the like by adding an inorg. particle having specific hardness and a specific mean primary particle size to the outermost layer of at least the single surface of a biaxially oriented laminated polyester film. CONSTITUTION:In a biaxially oriented laminated polyester film composed of a laminated structure of at least three or more layers, an inorg particle with Mohs hardness of 6 or more, for example, alumina whose crystal form is an alpha, beta, gamma or delta type, titanium nitride, zirconia or silica is contained in the outermost layer part of at least the single surface of said laminated polyester film. The content of the inorg. particle in the outermost layer part is set to 0.01-2.0wt.% and the mean primary particle size (d) thereof is set to 5-300nm and the relation with the thickness (t) of the outermost layer part is set to d

公开(公告)号：JPH04117430A

公开(公告)日：1992-04-17

申请号：JP23830790

申请日：1990-09-07

Applicant: TORAY INDUSTRIES

Inventor： NISHINO SATOSHI ,  ABE KOICHI ,  FUKUYAMA TAKEO

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

Abstract: PURPOSE:To obtain a polyester film excellent in chipping resistance at high speed, dubbing resistance, etc., by adding thereto a specified amount of specified copolymer particles. CONSTITUTION:This film contains 0.001-10wt.% crosslinked poly(ethylvinylbenzene/divinylbenzene) copolymer particles.

公开(公告)号：JPH02214735A

公开(公告)日：1990-08-27

申请号：JP3512189

申请日：1989-02-16

Applicant: TORAY INDUSTRIES

Inventor： ABE KOICHI ,  NISHINO SATOSHI ,  FUKUYAMA TAKEO

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08G63/18 ,  C08G63/78 ,  C08J5/18 ,  C08K3/22 ,  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 is rutile-type titanium dioxide particle having an average particle diameter of 10-400nm and its content in the film is 0.2-2wt.%. The particle B is alumina or organic polymer particle having an average particle diameter of 400-1,500nm and its content in the film is 0.01-0.2wt.%. The surface resistivity of the film is preferably OMEGA.cm. The standard deviation of the height distribution of surface protrusion is preferably

公开(公告)号：JPS647869B2

公开(公告)日：1989-02-10

申请号：JP11676381

申请日：1981-07-25

Applicant: TORAY INDUSTRIES

Inventor： TSUNASHIMA KENJI ,  YOSHII TOSHA ,  FUKUYAMA TAKEO

IPC: B32B27/32

公开(公告)号：JPS63237927A

公开(公告)日：1988-10-04

申请号：JP7254287

申请日：1987-03-26

Applicant: TORAY INDUSTRIES

Inventor： KITAURA KOICHI ,  FUKUYAMA TAKEO ,  OKASAKA HIDESADA

IPC: B29C55/12 ,  B29D7/01 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18

Abstract: PURPOSE:To obtain a film which can be cut off manually, easily and linearly and is superior in productivity, tenacity and heat resistance by a method wherein the value of birefringence of a biaxially oriented polyester film mainly composed of polyethylene terephthalate is made 0.04-0.10 and a thickness of the same is made 2-75mu by satisfying a specific formula. CONSTITUTION:An index of birefringence, tensile break strength in a main orientation tear direction (Tm), tensile break elongation in an auxiliary orientation direction of a biaxially oriented polyester film are established respectively as 0.04-0.10, 15-35kg/mm and 5%-70%. Then as the tensile break elongation (Em) in a main orientation direction is 80-170% and the tensile break strength in the auxiliary orientation direction is 4-20kg/mm , manual tear properties are improved. In addition, as stress (Fs) at the time of elongation of 5% in the auxiliary orientation direction exceeds break strength (Ts), the film is superior in productivity and tenacity. Thus the film which can be torn easily, linearly and manually can be obtained.

公开(公告)号：JPS6339961A

公开(公告)日：1988-02-20

申请号：JP18337386

申请日：1986-08-06

Applicant: TORAY INDUSTRIES

Inventor： KITAURA KOICHI ,  HATTORI TETSUYA ,  FUKUYAMA TAKEO

IPC: C08K3/10 ,  C08J5/18 ,  C08K7/16 ,  C08K7/24 ,  C08L101/00 ,  C09D5/23 ,  G11B5/73 ,  G11B5/733

Abstract: PURPOSE:To impart a forgery-preventing function to a film itself for use as the base sheet for cards and bonds and to improve secrecy and safety, by incorporating magnetic particles having a specified particle size in a plastic film. CONSTITUTION:A plastic film containing 0.001-10 wt% magnetic particles having an average particle size of 0.05-10 mu. When the size of the magnetic particle is smaller than 0.05 mu, it is difficult to detect magnetic signals, while when it is larger than 10 mu, the surface smoothness of the film is deteriorated and the appearance becomes poor. When the content of the magnetic particles exceeds 10 wt%, a difference in output distribution is small and the discriminating function is lowered, while when it is less than 0.001 25%, part of output signals can not be detected. When the plastic film is used as a card, individual cards can be discriminated by a difference in output signal distribution between them by detecting magnetic signal output with a magnetic sensor.

公开(公告)号：JPS6223665B2

公开(公告)日：1987-05-25

申请号：JP8965881

申请日：1981-06-12

Applicant: TORAY INDUSTRIES

Inventor： YOSHII TOSHA ,  TSUNASHIMA KENJI ,  FUKUYAMA TAKEO

IPC: B32B7/02 ,  B32B27/32

公开(公告)号：JPS6287321A

公开(公告)日：1987-04-21

申请号：JP22933585

申请日：1985-10-15

Applicant: TORAY INDUSTRIES

Inventor： ABE KOICHI ,  FUKUYAMA TAKEO ,  YOSHII TOSHIYA

IPC: B29C55/14 ,  B29K67/00 ,  B29L7/00

Abstract: PURPOSE:To stably make the re-stretching with high draw ratio possible by a method wherein, firstly, un-stretched film is stretched longitudinally; secondly, stretched laterally by the specified method and finally re-stretched at least in one direction. CONSTITUTION:Firstly, un-stretched film is stretched longitudinally. Secondly, under the state that the temperature at the edge of the resultant film to be laterally stretched is made lower than that at the central part of the film by 2 deg.C or more, the resultant film is laterally stretched so as to realize the conditions that the double refraction index of the film portion, which ranges from the film clamping position by 10-50mm to the center of the film, is 0.05-0.20 and the at the same time the mean thickness of said film portion is 3-15 times as thick as that of the center of the film. Thirdly, the resultant biaxially stretched film is re-stretched in al least either one out of the longitudinal or lateral direction. At this time, the re-heating treatment of the film can also be performed, when necessary. Thus, the breakage of the film is hard to develop, even when the re-draw ratio is higher and the manufacture of the film with high Young's modulus becomes stably possible at a high yield.

公开(公告)号：JPS61173916A

公开(公告)日：1986-08-05

申请号：JP1439885

申请日：1985-01-30

Applicant: TORAY INDUSTRIES

Inventor： KAWAKAMI KENICHI ,  FUKUYAMA TAKEO ,  YOSHII TOSHIYA

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00

Abstract: PURPOSE:To make it possible to stably perform the longitudinal re-stretching of a biaxially stretched film having an arbitrary width for a long time without bursting said film, by adjusting both metal rolls used as a low speed drive nip roll and a high speed drive roll to a specific temp. range. CONSTITUTION:In performing the longitudinal re-stretching of a biaxially stretched polyester film between low sped drive nip rolls, a metal roll 3 of which the surface timp. is 100-195 deg.C and a covered roll 4 having a polyurethane cover layer having a thickness of 4-25mm and hardness of 70-95 are used. The polyurethane forming the cover layer of the covered roll is prepared by crosslinking a stock polymer having an urethane bond (-NHCOO-) in the pres ence of diisocyanate or aromatic diamine. The value of the nip force between the low speed drive nip rolls must be 0.1-5kg/cm, pref., 0.5-3kg/cm. As the high speed drive roll, a metal roll, of which the surface temp. is adjusted to 75 deg.C or less, is used.