Consider quality consistency, certifications, delivery reliability, pricing, minimum order quantities, technical support, and the supplier's experience with your specific industry requirements.

Request certificates, audit reports, and references from existing customers. Many reputable suppliers participate in industry verification programs and are listed on trade exchanges.

MOQs vary by supplier, ranging from 5 tons for smaller suppliers to 50+ tons for larger operations. Negotiate terms based on your volume requirements.

Top suppliers implement rigorous quality control procedures including material testing, sorting, processing standards, and documentation tracking throughout the production cycle.

Pricing is usually based on polymer type, quality grade, volume, and current market rates. Suppliers offer tiered pricing for larger orders and long-term contracts.

Start with sample orders, verify quality consistency, negotiate favorable terms, and establish clear communication channels. Building trust through consistent business leads to better pricing and priority allocation.