Other

Lintec Corporation

Asahi Kagaku Kogyo Co., Ltd.

Etsuo Matsui

Masahiro Nakamura

A thermoplastic acrylic resin brittle film which has a tensile strength at break of 1.0 to 3.0 kg/mm,and an elongation at break of 2.0 to 20.0%, and is prepared from a resin composition which comprises (A) 100 parts by weight of a thermoplastic acrylic resin, (B) 10 to 70 parts by weight of a filler and, optionally, up to 30 parts by weight plasticizer. The filler can be (a) fused silica aggregates of particles having an average diameter of the particles in the range of 5 to 20 &mgr;m and diameters of the particles in the range of 0.5 to 100 &mgr;m, (b) aluminum hydroxide aggregates of particles having an average diameter of the particles in the range of 1 to 20 &mgr;m and diameters of the particles in the range of 0.2 to 50 &mgr;m, (c) barium sulfate aggregates of particles having an average diameter of the particles in the range of 1 to 20 &mgr;m and diameters of the particles in the range of 0.2 to 50 &mgr;m, and (d) calcium carbonate aggregates of particles having an average diameter of the particles in the range of 0.5 to 20 &mgr;m and diameters of the particles in the range of 0.1 to 50 &mgr;m.

Thermoplastic acrylic resin brittle film

A transparent brittle film prepared from a resin composition comprising (A) 100 parts by weight of a vinyl chloride resin, (B) 20 to 200 parts by weight of an acrylic resin, (C) 20 to 250 parts by weight of fused silica comprising aggregates of particles having an average particle diameter in the range of 5 to 20 .mu.m and individual particle diameters in the range of 0.5 to 100 .mu.m or aluminum hydroxide or barium sulfate comprising aggregates of particles having an average particle diameter in the range of 1 to 20 .mu.m and individual particle diameters in the range of 0.2 to 50 .mu.m, (D) 0 to 40 parts by weight of a plasticizer, and (E) 0.5 to 10 parts by weight of a stabilizer. The film is brittle, easily torn, and transparent, has a suitable degree of flexibility and hardness, and can be produced inexpensively and easily.

Growing community of inventors

Yamanashi-ken, Japan

Etsuo Matsui