Abstract: [Problem] Proper cooling of a molten sheet product by bringing the sheet into close contact with a movable cooling member, by properly charging over the whole width of the molten sheet product extruded on the movable cooling member. [Solving Means] A sheet production apparatus comprising an extruder 3 to extrude a thermoplastic resin having a melt specific resistance value of not less than 0.

Abstract: Described is an optical-use adhesive film that includes a base film of a biaxially oriented polyester film and an adhesive polymer layer laminated on at least one surface of the base film. The optical-use adhesive film has a light transmission equal to or greater than 90% and an increase in haze value after the optical-use adhesive film receives a heat treatment at 150° C. for 120 min. equal to or less than 0.5%.

Abstract: An optical-use adhesive film includes a substrate film formed of a biaxially oriented polyester film; and a polymeric adhesive layer provided on at least one surface of the substrate film. The optical-use adhesive film has a haze of 1.0% of less, and the substrate film contains foreign substance particles having a maximum size of about 20 &mgr;m or more at a ratio of about 10/m2 or less.

Abstract: An optical-use adhesive film comprises a base film of the optical-use adhesive film is a biaxially oriented polyester film having a thickness equal to or more than 50 &mgr;m, and an adhesive polymer layer laminated on at least one surface of the base film. Refractive indexes of the base film in longitudinal and transverse directions are both in the range of from 1.55 to 1.70 and refractive indexes of the adhesive layer and the base film satisfies the following formula (1): (Nx−Nc)2+(Ny−Nc)2≦0.0300  (1), wherein Nx and Ny respectively indicate refractive indexes in longitudinal and transverse directions of a base film and Nc is a refractive index of an adhesive layer.

Abstract: An optical-use adhesive film includes a substrate film formed of a biaxially oriented polyester film; and a polymeric adhesive layer provided on at least one surface of the substrate film. The optical-use adhesive film has a haze of 1.0% of less, and the substrate film contains foreign substance particles having a maximum size of about 20 &mgr;m or more at a ratio of about 10/m2 or less.

Abstract: A process for preparing a biaxially stretched film of polyamide blend, which comprises (1) extruding a polyamide blend in melt to make an unstretched film and (2) stretching the unstretched film first in a machine direction with a stretch speed of about 40,000 to 60,000,000 %/minute in a draw ratio of about 2 to 6 and then in a transverse direction with a stretch speed of about 500 to 100,000 %/minute in a draw ratio of about 2 to 6, or (2') stretching the unstretched film first to make a uniaxially stretched film having a plane orientation index of about 0.6 to 1.

Abstract: A heat-adhesive film laminate comprising a film of a plastic material having excellent heat resistance such as polyesters, polyamides or polycarbonates laminated on one side of a metal foil such as aluminum foil, copper foil, iron foil or the like and a film of a resin comprising predominantly block copolyester having a melting point of higher than 140.degree. C but lower than the temperature at which the characteristics of the plastic film is deteriorated and a Young's modulus .epsilon. (dyne/cm.sup.2) and a breaking elongation (.DELTA.l/lo) .times. 100 (%) when measured at 20.degree. C and 100.degree. C being as follows, respectively:10.sup.7 (dyne/cm.sup.2) < .epsilon. < 10.sup.10 (dyne/cm.sup.2) and(.DELTA.l/lo) .times. 100 > 40 (%)laminated on other side of the metal foil.