White pet film

When sourcing White PET (Polyethylene Terephthalate) film, you must prioritize thickness uniformity, opacity levels, and surface tension. Standard thicknesses range from 12 to 250 microns; ensure the supplier provides a tolerance within ±3%. For printing applications, a dyne level of 38 or higher is essential for ink adhesion. Additionally, verify the whiteness index (WI) to ensure color consistency across different production batches.

For food packaging applications, the film must be FDA compliant or meet EU Food Contact regulations (EC No. 1935/2004). For electronics or industrial use, ensure the product is RoHS and REACH certified to guarantee the absence of hazardous substances. If your brand focuses on sustainability, look for suppliers offering GRS (Global Recycled Standard) certified films containing post-consumer recycled content.

The choice depends heavily on the end-use: Labeling requires high-gloss or matte finishes with excellent die-cutting properties. Electrical insulation demands high dielectric strength and thermal stability. For solar backsheets, the film must have superior UV resistance and low moisture vapor transmission rates (MVTR). Always specify if the film needs to be corona treated or chemically coated for specific bonding requirements.

High-quality film should exhibit a tensile strength of at least 150 MPa in the machine direction and a shrinkage rate of less than 1.5% at 150°C for 30 minutes. Optical density should be consistent to prevent light leakage in backlit applications. Request a COA (Certificate of Analysis) for every lot to verify these mechanical and thermal properties.

Always request a pre-production sample and a small trial roll before committing to a full container. Utilize third-party inspection services (like SGS or Intertek) to conduct a Loading Check and verify that the rolls are free from wrinkles, gels, or black spots. On Made-in-China.com, prioritize Audited Suppliers who have undergone comprehensive on-site verification of their manufacturing capabilities.

PET film pricing is closely tied to raw material (PTA and MEG) market fluctuations. Negotiate a formula-based pricing model for long-term contracts. While standard MOQs are often 1 to 5 tons, you can negotiate lower volumes for specialized coatings by offering to pay a small-batch surcharge. Mentioning your growth potential on Made-in-China.com can often help in securing more flexible terms.

PET film is sensitive to pressure and moisture. Ensure rolls are wound on heavy-duty paper or plastic cores (3-inch or 6-inch) and packed with suspended end-boards to prevent flat spots (flat-sided rolls). Use desiccant silica gel inside the moisture-proof wrapping and specify horizontal palletization to ensure stability during sea freight and prevent telescoping of the film.

Use Secured Trading Services provided by platforms like Made-in-China.com to protect your payment until the goods are shipped. For large orders, consider Letter of Credit (L/C) or a 30% deposit / 70% balance against Bill of Lading (B/L). Avoid transferring funds to private bank accounts; always ensure the beneficiary name matches the company name on the proforma invoice.