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Copoly(p-phenylene terephthalamide/2,6-naphthalamide)aramid yarn

Image Number 5 for United States Patent #4698414.

Yarns of copoly(p-phenylene terephthalamide/2,6-naphthalamide) are disclosed which exhibit toughness and tenacity greater than the toughness and tenacity of yarns of poly(p-phenylene terephthalamide) having the same dimensions and made by the same process.

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