Acrylic film for punching, surface light-source device and process for manufacturing optical member
AssigneeMitsubishi Rayon Co., Ltd.
InventorsYuuhei Konokawa, Yoshiaki Satou, Kousuke Fujiyama, Yasuhiko Nabeshima, Tomoyoshi Yamashita
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Abstract
Provided is an acrylic film for punching excellent in transparency and free from breakage or whitening even if it is punched. The present invention is an acrylic film for punching containing a polymer (C) containing a di(meth)acrylate (A) unit represented by general formula (1) below and a mono(meth)acrylate (B) unit: —CH2—CR1—COO—(X)n—COCR1—CH2— (1) wherein (X) represents at least one repeat unit selected from C2H4O, C3H6O and C4H8O; the molecular weight of (X)n is 500 or more; and R1 represents H or CH3.
Claims20
An acrylic film comprising a polymer comprising (i) a mono(meth)acrylate unit and (ii) a di(meth)acrylate unit of formula (1):
- —CH2—CR1—COO—(X)n—COCR1—CH2— (1)
- wherein
- (X) represents at least one repeat unit selected from the group consisting of C2H4O, C3H6O and C4H8O;
- (X)n has a number-average molecular weight of 500 or more;
- and
- R1 represents H or CH3.
A surface light-source device emitting planar light by converting light from a single or a plurality of light-sources into planar light, the device comprising
- a light guide body, a light-source arranged adjacent to an edge surface of the light guide body, a light deflection device arranged in contact with a surface of the light guide body, and a reflector arranged in contact with a rear surface of the light guide body,
- wherein the light guide body comprises a polymer comprising (i) a mono(meth)acrylate unit and (ii) a di(meth)acrylate unit of formula (2):
- —CH2—CR1—COO—(X)n—COCR1—CH2— (2)
- wherein
- (X) represents at least one repeat unit selected from the group consisting of C2H4O, C3H6O and C4H8O;
- (X)n has a number-average molecular weight of 500 or more;
- and
- R1 represents H or CH3.
A light guide body comprising a polymer comprising (i) a mono(meth)acrylate unit and (ii) a di(meth)acrylate unit of formula (3):
- —CH2—CR1—COO—(X)n—COCR1—CH2— (3)
- wherein
- (X) represents at least one repeat unit selected from the group consisting of C2H4O, C3H6O and C4H8O;
- (X)n has a number-average molecular weight of 500 or more;
- and
- R1 represents H or CH3.
Dependencies are inferred from the claim text.