Polymers and resins

Polymers are traded on grade data sheets rather than on chemical identity alone. Two polyethylenes with the same CAS number can behave very differently, so buyers compare melt flow index, density, molecular weight, comonomer, additive package and the processing method a grade is designed for, such as injection moulding, film blowing or extrusion. For resins, viscosity, solids content and functional group content such as epoxy equivalent weight or hydroxyl value matter most.

When you request quotes, give the polymer type, the producer grade you want to match or the key properties, the processing method, and any approvals you need, such as food contact compliance under EU Regulation 10/2011 or US FDA rules, medical grade testing, or UL flammability ratings. Ask about prime versus off-grade or wide-spec material, and about recycled or bio-based alternatives if sustainability targets apply.