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    POLARIZING FILM
    23.
    发明专利
    POLARIZING FILM 失效

    公开(公告)号：JPH04204907A

    公开(公告)日：1992-07-27

    申请号：JP33973590

    申请日：1990-11-30

    Applicant: TORAY INDUSTRIES

    Inventor： KIGOSHI SHOJI ,  KITAURA KOICHI

    IPC: G02B5/30

    Abstract: PURPOSE:To improve polarizing characteristics and moisture-heat resistance by forming a base film of such a structure having specified orientation coefft. in an amorphous area of the polymer segment and, specified crosslinking index of the film with boron compd. CONSTITUTION:The polarizing film consists of a protective layer and a polarizer formed by allowing a dichroic dye to adsorb on a polyvinylalcohol base film and orienting the filma. In this film, the orientation coefft. in the amorphous area of the polymer segment which constitute the base film is specified to 0.65 0.85, preferably 0.70-0.80. Moreover, the crosslinking index CR of the film with a baron compd. is specified to 0.65-1.50, preferably 0.70-1.00. The CR is determined from the relation CR = A660/A600, wherein A660 and A600 are the absorbance of the film for 660cm and 600cm , respectively, in an IR absorption spectrum of the film. The polyvinyl base film is a polyvinyl alcohol film of 85-100mol% saponification value.

    PHASE DIFFERENCE PLATE FOR LIQUID CRYSTAL DISPLAY BODY
    24.
    发明专利
    PHASE DIFFERENCE PLATE FOR LIQUID CRYSTAL DISPLAY BODY 失效

    公开(公告)号：JPH04204402A

    公开(公告)日：1992-07-24

    申请号：JP33546190

    申请日：1990-11-29

    Applicant: TORAY INDUSTRIES

    Inventor： KOJIMA HIDEYUKI ,  KIGOSHI SHOJI ,  KITAURA KOICHI

    IPC: G02B5/30 ,  G02F1/13363

    Abstract: PURPOSE:To obtain the phase difference plate which can be widened in a visual angle range when the phase difference plate is built into a liquid crystal display body of an STN(super twisted nematic) system by having the specific phase difference plate. CONSTITUTION:The phase difference plate is obtd. by laminating a phase difference plate compensation plate and a visual field angle compensation plate and has an achromatic effect when the phase difference plate is viewed from the front and diagonal of the liquid crystal display body. In addition, the phase difference plate has R0, R0', R40, R40' satisfying the conditions of equations I to TV when the retardations at the perpendicular incidence of both compensation plates are respectively designated as R0, R0' and retardations at the diagonal incidence inclined by 40 deg. in the main orientation axis direction of the phase difference plate compensation plate respectively as R40, R40'. In the equations, DELTAR and DELTAR' are inverse codes. The phase difference plate adequate for a liquid crystal display device having an excellent visual field angle characteristic is industrially obtd. in this way.

    PHASE DIFFERENCE FILM
    25.
    发明专利
    PHASE DIFFERENCE FILM 失效

    公开(公告)号：JPH04194902A

    公开(公告)日：1992-07-14

    申请号：JP32744990

    申请日：1990-11-27

    Applicant: TORAY INDUSTRIES

    Inventor： KIGOSHI SHOJI ,  KOJIMA HIDEYUKI ,  KITAURA KOICHI

    IPC: G02B5/30

    Abstract: PURPOSE:To decrease dependence on view field angle and to widen a visible range by specifying the polymer material of a mixture which constitutes a film comprising two or more polymer components. CONSTITUTION:A film comprising a mixture of polymer materials is uniaxially oriented. Each polymer material used has positive or negative double refraction DELTAni when each single polymer material is uniaxially oriented. DELTAni is defined as formula I, wherein nalphai and nbetai are the refractive indices of the film of single polymer in the orientation direction and perpendicular to the orientation, respectively. Thereby, dependence on view field angle is decreased and visibility can be improved.

    METHOD FOR LAMINATING FILM FOR POLARIZING PLATE
    26.
    发明专利
    METHOD FOR LAMINATING FILM FOR POLARIZING PLATE 失效

    公开(公告)号：JPH0364703A

    公开(公告)日：1991-03-20

    申请号：JP20097589

    申请日：1989-08-02

    Applicant: TORAY INDUSTRIES

    Inventor： MURAKAMI YUTAKA ,  KITAURA KOICHI

    IPC: G02B5/30 ,  B29C65/52 ,  B29K29/00 ,  B29L9/00 ,  B32B7/12 ,  G02B1/08

    Abstract: PURPOSE:To improve adhesive strength, moisture and heat resistances by carrying out adhesion through a soln. of an adhesive contg. PVA having specified degrees of polymn. and saponification in the solid component under a specified pressure. CONSTITUTION:Polarizing films are adhered through a soln. of an adhesive at 35-90 deg.C under 3-30kg/cm pressure. The adhesive contains >=60wt.% PVA having 1,500-4,000 degree of polymn. and 90-100mol% degree of saponification in the solid component. When the degree of polymn. of the PVA is

    FIBER HAVING SPECIAL CROSS-SECTIONAL SHAPE
    27.
    发明专利
    FIBER HAVING SPECIAL CROSS-SECTIONAL SHAPE 失效

    公开(公告)号：JPS6228405A

    公开(公告)日：1987-02-06

    申请号：JP16395685

    申请日：1985-07-26

    Applicant: TORAY INDUSTRIES

    Inventor： TSUNEKAWA AKIO ,  KONNO YOSHIHIRO ,  KITAURA KOICHI

    IPC: D01F6/00 ,  D01D5/253 ,  D01F6/62

    Abstract: PURPOSE:Synthetic fibers, having a specific pi cross-sectional shape with joined three straight-line cross-sectional parts, capable of giving antipilling properties with little damage of fibers in the spinning process without deteriorating the abrasion strength of the product and further imparting also water absorbing property. CONSTITUTION:Fibers having three joined straight-line cross sectional parts A, B and C and other two straight-line cross-sectional parts B and C in the same direction joined at the inward position from the respective tips of the straight-line cross-sectional part A. The ratio (L2/L1) is within 0.3-1.5 range and the straight-line cross-sectional parts B and C are on the inside of tangent lines S1 and S2. The fibers can be applied to polyesters, polyamides, polypropylene, etc., which are hydrophobic synthetic fibers obtained by melt spinning.

    PRODUCTION OF POLARIZING FILM
    30.
    发明专利
    PRODUCTION OF POLARIZING FILM 失效

    公开(公告)号：JPH02148004A

    公开(公告)日：1990-06-06

    申请号：JP30263288

    申请日：1988-11-30

    Applicant: TORAY INDUSTRIES

    Inventor： MURAKAMI YUTAKA ,  KUKI HISAO ,  KITAURA KOICHI

    IPC: G02B5/30 ,  C08J7/02 ,  C08L29/02

    Abstract: PURPOSE:To obtain the polarizing film having a uniform polarization characteristic and good moisture and heat resistance by specifying a rinsing temp. and electrical conductivity at the time of subjecting a film adsorbed with a dichromatic dye to a rinsing treatment. CONSTITUTION:The rinsing temp. is maintained at the temp. equal to -15 deg.C which is an exhaustion temp. or below this temp. and the rinsing is executed with the water having

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