Amorphous Polyamides

Amorphous polyamides are designed to give no crystallinity to the polymer structure. 

The tertiary butyl group attached to the amine molecule is bulky and disrupts this molecule’s ability to crystallize. This particular amorphous polyamide is sometimes designated as Nylon 6-3-T. Amorphous polymers can have properties that differ significantly from crystalline types, one of which is optical transparency. 

Some of the amorphous polyamide characteristics are as follows: 

• Crystal-clear, high optical transparency,

• High mechanical stability, 

• High heat deflection temperature, 

• High impact strength, 

• Good chemical resistance compared to other plastics, 

• Good electrical properties, 

• Low mold shrinkage. 

Another amorphous polyamide is called Nylon 6I/6T and is a mixture of the two polyamide segments. Blending even low percentages (20%) of Selars PA (PA 6I/6T) with nylon 6, nylon 66, and polyamide copolymers will result in a product that behaves like an amorphous polymer. These blends retain all of the advantages of the Selars PA resin with some of the mechanical property advantages of semicrystalline polyamide. Applications and Uses: Used as a monolayer or as a component of multilayer flexible films in meat and cheese packages as well as rigid packaging. Multilayer or monolayer types are used in transparent hollow vessels (bottles), packaging films, and deep-drawn plates.

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