Footwear Inspection---Analysis of Footwear Defect Types
As a professional third-party inspection company in China, footwear inspection has become a good job of NBN. We provide quality control and inspection services for our clients from all around the world in Wenzhou, Hangzhou, Putian, Quanzhou, etc., which the main footwear producing areas in China.
Although there are many types of footwear, all products have similar common defects, such as degumming, stains, and untrimmed materials. This article discusses some of the most critical defects that are easily overlooked during the inspection process.
1. Loose insole
No glue applied during production: the insole can slide freely when the insole is loaded into the shoe
The area of the glue is too small: the glue area is less than 2/3 of the insole
The glue coating is too thin: when the product is sold, it may be a few months after production, during which time the glue is ineffective due to water loss in the glue.
Poor quality of glue: can cause the insole to be not strong enough, or the glue to be permanently ineffective
During the inspection process, the insole should be tested for adhesion to ensure that the insole and the shoe are firmly bonded, the rubberized area is normal, and the quality of the glue is checked. The number of samples tested is at least S2.
2. Product information error
The product information of the shoes will generally be on the shoe box, tag, label, and the information includes specifications, shoe size, color, materials, barcodes, etc. Any error in information can lead to serious consequences.
Product information printing error
Other errors in the tag installation or packaging process (such as 24 yards of shoes loaded in a 25-yard shoe box)
The inspector must check all product information against the specifications provided by the customer, based on at least S3 sampling. In addition, a barcode scan test must be performed to ensure that the barcodes are readable.
The production process of shoes includes a large amount of manual processing, so appearance defects are inevitable.
Due to the difference in the method of operation of each worker, the difference in the cutting and bonding of the fabric is caused. In addition, the placement methods and environment of semi-finished and finished products will also have an impact on product quality.
The inspector must randomly select a certain number of outer boxes from the packaged finished products in strict accordance with the sampling criteria, and then sample from each outer box and perform visual inspection in strict accordance with the AQL standard.