Poly(vinyl alcohol) polymer film and process for producing same

[Problem] To provide a thin PVA film which is less apt to break when stretched. [Solution] A poly(vinyl alcohol) polymer film which has a thickness of 50 [mu]m or less and a curl angle, shown below, of 200degrees or less. Curl angle: a rectangular film strip cut out of the poly(vinyl alcohol) polyme...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	KATSUNO RYOJI, KAZETO OSAMU, INOSHITA SHOHEI, HIKASA SHINTARO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	[Problem] To provide a thin PVA film which is less apt to break when stretched. [Solution] A poly(vinyl alcohol) polymer film which has a thickness of 50 [mu]m or less and a curl angle, shown below, of 200degrees or less. Curl angle: a rectangular film strip cut out of the poly(vinyl alcohol) polymer film and having dimensions of 42 cm (length direction) * 4 cm (width direction) is examined by attaching a weight to a portion ranging from one length-direction end (a0) to a linear part (a1) having a width-direction dimension of 4 cm and located 1 cm inside the end (a0), so that the linear part (a1) is fixed, clipping a portion ranging from the other length-direction end (b0) to a linear part (b1) having a width-direction dimension of 4 cm and located 1 cm inside the end (b0), so that the linear part (b1) is fixed, immersing the film strip in this state in 30DEG C water for 30 seconds so that the end (a0) is below the end (b0) and the length direction is vertical, and then measuring the curl angle at a linear part (c) having a width-direction dimension of 4 cm and located at the center in the length direction.