FILM FOR DISPLAY, POLARIZING PLATE AND MANUFACTURING METHOD THEREOF, AND LIQUID CRYSTAL DISPLAY

1 . A method of producing a film, for a display comprising the steps of:

(i) melting a mixture of a cellulose ester and a compound represented by a formula selected from the group consisting of Formulas (I), (Ia), (I-1), (I-2) and (I-3);

(ii) extruding the melt of the mixture to form a film;

(iii) cooling the extruded film on a substrate;

(iv) peeling the film from the substrate;

(v) stretching the peeled film; and

(vi) winding the stretched film in a roll to form a long length roll film:

wherein R 2 to R 5 each independently represent a hydrogen atom or a substituent; R 2 and R 3 , R 3 and R 4 , and R 4 and R 5 may be combined to form a ring; R 6 represents a hydrogen atom or a substituent; n represents an integer of 1-4; when n equals to 1, R 1 represents a substituent; and when n is 2-4, R 1 represents a di- to tetra-valent linkage group,

wherein n represents an integer of 2 to 4; m represents an integer of 1-3; R 1a and R 6a each independently represent a hydrogen atom or a substituent; R ta represents a hydrogen atom or a substituent; a plurality of R ta may be combined to form a ring; and R ka represents a di- to tetra-valent linkage group,

wherein R 2 to R 5 each independently represent a hydrogen atom or a substituent; R 7 to R 11 each independently represent a hydrogen atom, an alkyl group having 1 to 18 carbon atoms or an alcokyl group having 1 to 18 carbon atoms,

wherein R 2 to R 5 each independently represent a hydrogen atom or a substituent,

wherein R 1 , R 2 , R 3 , R 5 and R 6 each independently represent a hydrogen atom or a substituent; R 2 and R 3 may be combined to form a ring; and X represents a divalent linkage group.

2 . The method of claim 1 , wherein

the substrate is a cooling roll; and

the method further comprises a step of pressing the film being cooled on the cooling roll with a touch roll, between steps (iii) and (iv).

3 . The method of claim 1 , wherein the mixture further has a compound represented by Formula (A):

wherein R 11 to R 16 each independently represent a hydrogen atom or a substituent.

4 . The method of claim 3 , wherein the mixture further has a compound represented by a formula selected from the group consisting of Formulas (C-1), (C-2) and (C-3):

wherein Ph 1 and Ph′ 1 each represent a substituent, Formula (C-2)

wherein Ph e and Ph′ 2 each represent a substituent, and Formula (C-3)

wherein Ph 3 represents a substituent.

5 . The method of claim 4 , wherein the mixture further has a compound having a structure obtained by condensing an organic acid represented by Formula (I) and a polyalcohol having a valence of 3 to 20, as a plasticizer:

wherein R 1 -R 5 each independently represent a hydrogen atom, a cycloalkyl group, an aralkyl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an aralkyloxy group, an acyl group, a carbonyloxy group, an oxycarbonyl group, or an oxycarbonyloxy group, any of which may further be substituted, and L represents a linkage group including a substituted or unsubstituted alkylene group, an oxygen atom or a direct bond.

6 . The method of claim 5 , wherein a content of the plasticizer is 2 to 20% by mass based on a mass of the cellulose ester.

7 . The method of claim 5 , wherein a content of the plasticizer is 5 to 15% by mass based on a mass of the cellulose ester.

8 . The method of claim 1 , wherein a length of the long length roll film is 100 to 10000 m.

9 . A method of producing a polarizing plate comprising the step of:

winding back the long length roll film of claim 1 and laminating a polarizer film to form the polarizing plate.