Lamination film is essential for office, educational, catering, and document protection applications. For wholesale customers, choosing reliable lamination film is crucial. Below is a detailed explanation of how to evaluate lamination film quality.
1. Film Thickness
Thickness Standard: Lamination film thickness generally ranges from 60–250 microns (per side).
Thickness Impacts Quality:
Too Thin → Wrinkling, Delamination, and Poor Protection.
Moderate Thickness → Secure Edge Sealing and Prevents Documents from Warping.
Purchasing Recommendation: Choose the appropriate thickness based on the intended use. For office documents, choose 60–80 microns; for long-term storage or menus, choose 150–250 microns.
2. Surface Finish
Glossy Film: Highly transparent and vibrant colors, suitable for displaying photos, documents, and more.
Frosted Film: Anti-glare and writable, suitable for teaching cards, menus, and document labeling.
Qualified film is considered acceptable if its surface is smooth, free of bubbles, and free of particles.
3. Edge Sealing Quality
The edge sealing is the seal around the film after hot pressing and directly affects its durability:
Good edge sealing: Smooth, secure, and waterproof and dustproof.
Poor edge sealing: Prone to warping, delamination, and moisture.
Purchasing Tips: Check whether the edge sealing width is ≥2.5–3 mm and whether the edge sealing is uniform.
4. Matching Hot Melt Adhesive and Film Material
High-quality lamination film: A combination of PET film and EVA hot melt adhesive offers strong adhesion, fold resistance, and high transparency.
Poor-quality film: Thin or uneven hot melt adhesive can easily delaminate and crack.
Identification Method: Use a hot laminator to seal a test piece of paper to check for secure edge sealing and uniform transparency.
5. Packaging and Craftsmanship
Regular packaging: Clear labeling with clear dimensions, thickness, and specifications.
Craftsmanship Standards: The film surface is free of scratches and creases, and the curl is uniform.
Purchasing Tips: Wholesale customers should choose a reputable manufacturer to ensure standardized packaging and stable supply.