On November 25, 2020, law firm Keller and Heckman LLP (KH) reported that China approved expanded food contact use of the two polymers, polyethylene (CAS 9002-88-4) and carboxy styrene-butadiene latex (CAS 25085-39-6, also called 2-Propenoic acid, polymer with 1,3-butadiene and ethenylbenzene).
Polyethylene may now be added at a maximum level of 0.3 % to polyoxymethylene (POM) (CAS 66455-31-0), with processing temperatures below 121°C.
The second material may now be used in indirect food-contact pressure-sensitive adhesives where filling and long-term storage are at room temperature. The specifications include maximum permitted quantity (QM) set for 1,3-butadiene (CAS 106-99-0) at 1 mg/kg material and specific migration limits (SML) set at 6 mg/kg for acrylic acid (CAS 79-10-7) and at non-detectable (ND) for 1,3-butadiene, with detection limit equaling 0.01 mg/kg.
KH (November 25, 2020). “China Approves Expanded Usage for Food-Contact Substances.”