Hot Sales Custom Printing RPET 600D Waterproof School Backpack Bag
- Category: School Bags >>>
- Supplier: Huizhou Hongfeng Technology Development Co. Ltd.
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Product Overview
Description
Brand | WIN |
Style | WATERPROOF SCHOOL BACKPACK BAG |
Model | BP354XL |
Material Type | RPET 600D PVC FREE |
Whether the folding | Foldable |
Whether waterproof | Waterproof |
Dimension information | 30*12*45 CM |
Usage | Dual purpose ( you can take it by hand or you can carry it on your back) |
Function and use: | STYLIZED PRINTING BACK TO SCHOOL BACKPACK FOR KIDS IS OUR HOT SELLING PRODUCT to keep one for everyday using makes you and kids happy. CARRY YOUR BACK TO SCHOOL ITEMS WITH YOU! Advantage： 1. Durable and strong fabric 2. Large capacity design 3. Multi-functional use, can be picked up by hand or on the back 4. Water resistant fabric is dirty and easy to wash 5. The whole bag is made of TPU reinforced fabric |
Waterproof Material
Our marvellous waterproof quality is based on selected materials that are developed for specific applications. Such materials include polyester, nylon, PVC free, Cordura fabrics etc. that are coated on one or both sides. Winfung's TPU Backing Coating Technology meet extremely high waterproof specifications and are far superior than commercially available coatings method in the market.
Superior Bonding Methods
he coated fabric used by Winfung - including all welded seams - continues to resist leaking when exposed to 20,000pa coloumn of water! This professional degree of waterproofing is achieved using a process known as high frequency welding (HFW). Instead of applying heat from the outside, HFW involves the application of high frequency voltage to the objects that need to be welded. The voltage causes the molecules within the various materials to vibrate and, essentially, to generate heat. Softened from within by the heat, the materials are then bonded under high pressure, leaving the welded seam at least as stong as the surrounding material.
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