The True Nature of Sealing Tape
The double-sided adhesive tape used for sealing plastic bags is scientifically called pressure-sensitive tape. Its special feature is that it's sticky on both sides, with a release paper sandwiched in the middle. This tape uses acrylic adhesive, and it only becomes sticky under pressure, like an invisible zipper on a plastic bag. Common widths are 1.5cm and 2cm. A 10-meter roll can seal approximately 200 medium-sized food bags.
Three Key Differences from Ordinary Tape
Adhesive Design: Ordinary tape is single-sided adhesive, while sealing tape is double-sided.
Material Characteristics: Made with food-grade base material, it's softer and more durable than ordinary tape.
Usage Scenarios: Specifically developed for PE/PP plastic films, improving adhesion by 40%.
Buying Guide to Avoiding Pitfalls
When choosing, pay attention to the transparency of the tape base material; high-quality products can have a light transmittance of up to 90%. When testing adhesion, after applying, let it sit for 10 minutes before tearing it off; if the residual adhesive is less than 5%, it's a qualified product. Preheat with a hairdryer for 3 seconds before use in winter to quickly restore stickiness. Avoid direct sunlight when storing; shelf life is typically 2 years at 25℃.
