A layer of PP film is coated on the surface of the ordinary non-woven fabric bags, and the main materials increased compared with ordinary non-woven fabric bag is PP film, printing ink, and film plastic.
A layer of PP film is coated on the surface of the ordinary non-woven fabric bags, and the main materials increased compared with ordinary non-woven fabric bag is PP film, printing ink, and film plastic. In terms of current technology, the weight of about 25 grams will be increased under normal conditions. PP woven film covered shopping bag has waterproof and moisture-proof function compared with the ordinary non-woven bag, and the color that can be printed is more bright and beautiful, and the service life is longer than an ordinary non-woven bag.
High tensile strength and good tension;
High transparency and good luster;
High softness and good touch;
Good oil and solvent resistance ability, heat sealing and printing ability;
Low air permeability and good air resistance;
It can be added with plastic daughter buckle or self-adhesive plastic bag;
First is look:
Whether the shape of the bag is full, whether the arc is natural, whether the paste is flat, whether the angle is symmetrical, whether the fabric has obvious defects, and whether it is clean.
Check whether there are empty stitches, missed stitches and skipped stitches.
Whether the manufacturer's name, address, and materials used for the products are indicated on the label.
Second is try:
Whether zipper closure is smooth
Whether the handle and strap are sewn firmly (you can use your hand to pull slightly)
Whether the handle is comfortable to hold
The supporting part on the back of the schoolbag should have soft and elastic buffer treatment, and the corner part with concentrated pressure should not appear when carrying.
The schoolbag belt should not clip the neck of the backpacker
The length of the schoolbag belt should be adjustable flexibly and locked firmly.
The third is the note:
The surface of the plastic and metal accessories installed on the schoolbag shall be free of sharp tips and burrs, so as to avoid injury to the human body or hook damage to clothing during use.
Black nylon zipper
Black ribbon handle