Standard For Leather Sandals

The standard for testing leather sandals is QB / T 2, 30 - 7 "leather sandals". The standard specifies the marking, appearance, thickness of the band, peel strength, folding resistance, wear resistance, the thickness of the sole, the hardness of the heel, the pull-out strength of the leather, and the bending rigidity of the hook.

sign

Each pair of shoes should be marked with manufacturer's name or trademark shoe number; the inside package (shoe box) should have obvious factory name, factory site, trade mark and zip code; the inside package (shoe box) must have the product name (must indicate the upper material: natural leather, imitation leather material, etc.). Natural leather should be marked with leather made from natural materials such as cattle, pigs and sheep.

In the process of leather processing, thicker animal skins, such as cattle and pigs, need to be split into several layers by means of a split machine to obtain thick and thin leather. The first floor is called two or three floors.

Synthetic leather is made of non-woven fabrics, polyurethane and other substrates. Artificial leather is made of fabric based chemical raw material.

The inside package (shoe box) also has the number and shoe number (the Chinese shoe number based on the millimeter system, the foot length as the benchmark), the grade, the color of the shoes, and the standard number of the execution.

Appearance quality

Band: the color, thickness, pattern and thickness of the same parts of the same shoes should be basically the same. Slight defects are allowed, but no cracks or cracks are allowed. The chisel must be thorough, and the chisel shall allow one place.

Bandage: upright and uniform. The same parts of the shoes are basically the same. Don't shrink the belt. Gouging and knitting are not deformed. The difference between the same parts of the same pair of shoes is not more than 2.5mm.

Main and internal: hardness is appropriate, no shrinkage deformation.

Heel: firm, upright and symmetrical. Size, height, color and consistency.

Adhesion: no glue and no glue.

Hook heart: Not soft (not deformed), continuous, not loose, and heel height exceeding 8mm.
There must be a hook.

Inside and outside shoes: neat, smooth, and non decolorizing inside shoes.

Hem edge: basically neat and even, no crack edges.

Accessories: assembly is firm and basically symmetrical.

Upper stitches: neat lines, uniform needle, bottom line tightness is basically the same, the main parts are not allowed to have jumpers, minor parts jumper, heavy needle allows one needle, each shoe should not exceed two. No break is allowed in rush lane.

Outsole: the color, pattern and thickness of the same shoe outsole are basically the same. The skin bottom allows slight defects.

peel strength

The peel strength is a test index for evaluating the bonding process of adhesives and production enterprises, which directly reflects the bonding fastness of the bottom and the bottom. Peel strength men's shoes are equal to 70N / cm, women's shoes are equal to 50N / cm. A kind of