从China供应商批量进口A4 Pvc Book Cover 14c 21x29.7cm

The A4 PVC book cover from Yiwu Joinus Stationery Co., Ltd. is a 14c thickness clear protective sleeve sized at 21x29.7cm, matching the A4 paper standard. The 14c gauge corresponds to approximately 0.14mm thickness, a common commercial grade for document covers that balances flexibility with puncture resistance. The clear PVC material is free of clouding, allowing full visibility of the contents while shielding against moisture, dust and abrasion.

This cover variant uses standard PVC formulation with UV inhibitors to reduce yellowing over time, typical for archival and educational use. The edges are heat-sealed to prevent splitting, and the sleeve accommodates up to 200 sheets of 80gsm paper without stretching. Industry practice for such covers includes a tolerance of ±0.5mm on dimensions, with a standard bursting strength of 1.2MPa for this thickness class.

Schools and offices in China commonly use these covers for textbooks, manuals and presentation folders, as the A4 size aligns with local printing standards. Buyers source in bulk cartons, with each cover weighing about 45g. The supplier’s address in Yiwu, Zhejiang places it in a major stationery manufacturing hub, where such products are produced in high volume for domestic and export markets.

Yiwu Joinus Stationery Co., Ltd. operates from 423 Suxi Road, Xufeng Village, in Yiwu, Zhejiang, a region known for its concentration of stationery manufacturers and wholesalers. The company holds a harbor trust tier, indicating a baseline level of verification on the platform, though its response rate and average response time are currently unrecorded.

The supplier’s profile does not specify production capacity, certifications, or export history, but its location in Yiwu suggests access to established supply chains for PVC-based stationery products. Buyers should verify manufacturing capabilities and quality control processes directly, as the listing provides no additional details on factory size, workforce, or annual output.