About Food Contact Testing of Nylon (Polyamide) Polymers

Nylon materials (and their copolymers) are used in a wide variety of food contact materials from storage containers to flexible packaging. The FDA requires that nylon resins intended for use in food contact applications must meet certain requirements for identity and extractable content.  

Approach

1.       Samples must be verified as a nylon type (6, 6.6, 6.10, 6.12, 12 or copolymers) by specific gravity, melting point and solubility in 4.2N HCl.

2.       Extractable content is measured in distilled water.  Extractable content shall not exceed 0.07 to 2.0 weight percent depending on the nylon type.

3.       Extractable content is measured in 95% ethanol.  Extractable content shall not exceed 0.2 to 2.5 weight percent depending on the nylon type.

4.       Extractable content is measured in ethyl acetate.  Extractable content shall not exceed 0.003 to 1.5 weight percent depending on the nylon type.

5.       Extractable content is measured in benzene.  Extractable content shall not exceed 0.00 to 1.5 weight percent depending on the nylon type.

Sample Considerations

30 grams of material are required to complete the testing.