Film of good tear property on impact

Details Film of good tear property on impact Film of good tear property on impact

1976-01-08

1977-08-30

Seccuro, Carman J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260897B, 264289, 264210R, C08L 2312, C08L 2308, C08L 2306, B29G 2700

Patent

active

040455157

ABSTRACT:
A film of excellent cutting property in the transverse direction which comprises a mixture of polypropylene and at least one ethylene polymer and satisfying the following requirements:
1. Ny - Nx = 6 .times. 10.sup.-3 .about. 25 .times. 10.sup.-3 :
Wherein Nx in the refractive index in the machine direction and
Ny is the refractive index in the transverse direction;
2. (Nx + Ny) .times. 0.5 - Nz .ltoreq. 0.012:
Wherein Nz is the refractive index in the vertical direction and Nx and Ny are each as defined above;
3. break elongation in the machine direction = 150 .about. 800%; and
4. no substantial necking is seen on the surface thereof.

REFERENCES:
patent: 3372049 (1968-03-01), Schaffhausen
patent: 3634553 (1972-01-01), Foglia et al.

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