Abstract: A film stretched uniaxially in the transverse direction selectively is obtained by preventing a phenomenon that the film is stretched also in the longitudinal direction in stretching the film in a direction transverse to the conveying direction. A film F is stretched in the transverse direction while being gripped with clips 2 each having a corrugated upper teeth part (holding member piece) 12 and a corrugated lower teeth part (holding member piece) 11. Furthermore, the film F is shaped into a wavy form using corrugated gripping members 6a and 6b and stretched in the transverse direction while being held with the clips 2 having the holding members.

Abstract: It is an object to provide a method for producing a retardation film and the like, the retardation film contributing to cost reduction and enlargement of the screen of liquid crystal display devices having a high level of visibility. There is provided a method for producing a retardation film, the method including conveying a long polymer film being continuously fed in a conveying direction while holding both side edges of the polymer film and stretching the polymer film in a direction transverse to the conveying direction while conveying the polymer film, wherein the retardation film has an optical axis in the direction transverse to the conveying direction of the polymer film and has optical properties satisfying 0.1?NZ?0.9, and wherein the polymer film is stretched in the transverse direction with sagged in the conveying direction.

Abstract: A film stretched uniaxially in the transverse direction selectively is obtained by preventing a phenomenon that the film is stretched also in the longitudinal direction in stretching the film in a direction transverse to the conveying direction. A film F is stretched in the transverse direction while being gripped with clips 2 each having a corrugated upper teeth part (holding member piece) 12 and a corrugated lower teeth part (holding member piece) 11. Furthermore, the film F is shaped into a wavy form using corrugated gripping members 6a and 6b and stretched in the transverse direction while being held with the clips 2 having the holding members.

Abstract: A method for producing a polyimide film in which the imidation ratio and/or the amount of volatile constituent are controlled to improve the adhesive strength of the polyimide film. The method may also comprise controlling the highest temperature of heating the prefilm to improve the adhesive strength of the polyimide film.

Abstract: The present invention provides an improved grade of polyimide containing an organic phosphorus compound, a film composed thereof and a method of making the aforementioned film. According to the present invention, it is possible to obtain a polyimide film improved in mechanical strength.