Synthetic filament-reinforced polymer material sheet and process for producing the same
AssigneeTeijin Limited
InventorsYoshiyuki Sasaki, Tetsuo Okamoto
Life of this patent
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Abstract
A synthetic filament-reinforced polymer material sheet having a very small thickness of 0.25 mm or less and a large specific tensile strength of 3.4.times.10.sup.6 cm or more is composed of a reinforcing sheet in which a number of straightened individual synthetic polymer filaments are arranged in parallel to each other and are spaced from each other at an average interval not larger than the average thickness of the filaments, and which has a width W anmd a thickness T satisfying the relationship W/T.gtoreq.40 and a coefficient of variation of thickness of 30% or less, and a polymer material impregnated in the spaces between the individual filaments.
Claims7
A synthetic filament-reinforced polymer material sheet having a thickness of 0.25 mm or less and a specific tensile strength of 3.4.times.10.sup.6 cm or more, and comprising:
- a reinforcing sheet comprising a number of individual synthetic polymer filaments straightened and arranged substantially in parallel to each other and spaced from each other at an average interval equal to or smaller than the average thickness of the individual filaments, and having a width W and a thickness T thereof satisfying the relationship:
- W/T.gtoreq.40
- and a coefficient of variation in the thickness thereof of 30% or less;
- and
- a polymer material impregnated in the reinforcing sheet to fill the spaces among the individual filaments.
Dependencies are inferred from the claim text.