A321 Specialty Nylon is a new material newly developed in recent years. It is a polycondensation product of m-xylylenediamine and adipic acid. It is a semi-crystalline polymer. Its melting point is 20°C higher than that of PA6, and its gas barrier properties and thermal properties are better than PA6, has better transparency and puncture resistance, oxygen permeability is 10 times smaller than PA6, and moisture resistance is better than EVOH.
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