Leather inspection

 

Overview

 

The leather industry covers the main industries such as tanning, shoemaking, leather clothing, leather goods, fur and its products, as well as supporting industries such as leather chemicals, leather hardware, leather machinery, and accessories. AGC Xinyuhuan testing is based on international standards ISO, American AATCC, ASTM and CPSC, British BS, German DIN, Japanese JIS, International Wool Bureau IWS and China GB and other relevant standards to test various properties of leather products.

 

Leather classification:

 

Raw leather: cowhide, goat, sheep, pig, raccoon, rabbit, fox, mink

Finished leather: shoe upper leather, shoe lining leather, garment glove leather, sofa leather, car seat leather, luggage leather, special/professional finished leather

Finished Leather Garments: Leather Coats Leather Jackets Leather Hats Fashion Leather Special/Professional Finished Leather Garments

Fur products: fur mattresses, fur clothing, fur hats, fur toys, mink fur products, fox fur products

Leather Accessories Leather Hardware: Molded Soles Artificial Leather Synthetic Leather Heels Lasts Shoe Laces Leather Hardware Accessories Special/Professional Leather Accessories

Ball leather: leather basketball, leather volleyball, leather soccer, special/professional leather balls

 

Standards and Regulatory Requirements

 

GB/T16799-2008 Leather for furniture

GB/T4689.21-2008 Determination method of water absorption of leather

GB/T4689.22-2008 Determination method of leather air permeability

GB/T4690-1984 Classification of finished leather parts

GB/T4689.20-2008 Determination method of adhesion fastness of leather coating

GB/T 19940-2005 Powdered chrome tanning agent - Determination method of hexavalent chromium ion

GB/T 19941-2005 Leather and fur-chemical test-Determination of formaldehyde content

GB/T 19942-2005 Leather and fur-chemical test-Determination of prohibited azo dyes

GB 20400-2006 Leather and Fur-Limits of Hazardous Substances

GB/T 22807-2008 Leather and fur-chemical test-Determination of hexavalent chromium content

GB/T 22808-2008 Leather and fur-Determination of pentachlorophenol content by chemical test

GB/T 22886-2008 Leather - Color fastness test - Water fastness

GB/T 22888-2008 Leather - Physical and mechanical tests - Determination of low temperature embrittlement temperature of surface coatings

GB/T 22889-2008 Leather - Physical and mechanical tests - Determination of surface coating thickness

 

Test items

 

Physical performance test:

Tensile strength, elongation, tear strength, tensile strength, shrinkage temperature, burst height, burst strength, leather apparent density, leather shoe try-on test, sensory quality, peel strength, outsole and outer midsole adhesion strength, Shoes folding resistance, wear resistance, heel adhesion, upper (belt) pull-out strength, shank bending stiffness, shank hardness, heel hardness, coating folding fastness (room temperature/low temperature), bottom leather Folding fastness, water absorption, heat resistance, oil resistance, fur flame retardancy

 

Chemical performance test: pH value, hexavalent chromium content, formaldehyde content, prohibited azo dyes, odor, fur volatile content, leather moisture content and volatiles, phthalate detection, isoaldrin (qualitative) detection , nickel release detection, carcinogenic dye detection, allergenic dye detection, lead detection, perfluorooctane sulfonic acid detection, cadmium detection, arsenic detection, free formaldehyde detection, formaldehyde content detection, tetrachlorophenol (artificial leather PU), five Chlorophenol (artificial leather PU), tetrachlorophenol detection, pentachlorophenol detection, dimethyl fumarate (DMF) detection, hexavalent chromium detection, banned azo dye detection

 

Color fastness: color fastness to rubbing, color fastness to water, color fastness to perspiration, color fastness to light

 

 

 

shoe test

 

Overview

 

With the increasing improvement of people's material living standards and the rapid development of science and technology, various new shoe materials continue to emerge in the market, and people's concept of ensuring the quality of footwear products is also increasing, seeking high-quality and cheap footwear. The product has also become an important factor to consider in the trade of footwear products in various countries. To this end, governments of all countries will regularly or irregularly review, revise old laws and regulations on footwear products or formulate new laws and regulations, methods and requirements for footwear products to monitor market footwear products meet their quality. requirements. In order to avoid footwear trade risks to the greatest extent and protect the interests of both footwear manufacturers and footwear consumers in international trade, it is necessary to understand the testing content of footwear product quality, its related requirements and its development trends. Very necessary.

 

Standards and Regulatory Requirements

 

QB/T 4329-2012 Cloth shoes

GB/T 6677-2008 Classification of Cloth Shoes

GB/T 22756-2008 Leather Sandals

GB 20096-2006 roller skates

GB/T 19706-2005 football boots

GB/T 15107-2005 travel shoes

GB 25038-2010 Technical Specification for Health and Safety of Rubber Shoes

GB 25036-2010 Cloth children's rubber shoes

GB 12011-2009 Foot protection Electrically insulating shoes

GB 21146-2007 Personal Protective Equipment Occupational Shoes

GB 21147-2007 Personal Protective Equipment Protective Shoes

GB 21148-2007 Personal Protective Equipment Safety Shoes

GB/T 3807-1994 PVC Microporous Plastic Slippers

GB/T 20991-2007 Personal protective equipment - Test method for shoes

GB/T 24129-2009 Test method for non-marking outsole of rubber shoes and sports shoes

GB/T 18204.8-2000 Microbiological test method for slippers in public places-Determination of mold and yeast

GB/T 22049-2008 Footwear Standard environment for environmental conditioning and testing of footwear and footwear components

GB/T 26713-2011 Footwear-Chemical test methods-Determination of dimethyl fumarate (DMF)

GB/T 28409-2012 Personal protective equipment Guide for selection, use and maintenance of foot protective shoes (boots)

 

Test items

 

Physical property testing

 

test site	Test items
sole	slip resistance   Abrasion resistance   bendability   hardness   Elongation   interlayer peel strength   split tear force
Help surface and inner	Bending resistance test   Color fastness   Tear and Tensile Testing   suture strength   degeneration   Thermal insulation   Friction resistant   Breathable and water permeable   aging treatment
insole	Thermal insulation   Abrasiveness   Color fastness

 

Chemical performance testing

Ban azo dyes	Dimethyl Fumarate
REACH 15 substances of very high concern in the regulations	Nickel release
Pentachlorophenol	Tetrachlorophenol
Eight heavy metals in toys	Eight heavy metals in textiles
formaldehyde	pH
total lead	cadmium
Organotin	Phthalates
polycyclic aromatic hydrocarbons	carcinogenic sensitizing dyes
Hexavalent chromium	Nonylphenol

Luggage test

 

Overview

 

With the development of the economy and the improvement of the quality of life, people have begun to increase the requirements for the comfort of luggage and accessories, as well as environmental protection and health. Due to the emergence of EU regulations, US CPSC and other regulations, the quality and safety of luggage and accessories products are more and more concerned by consumers in various countries, and the quality requirements are becoming more and more strict. Many countries and companies have established their own control requirements for luggage and accessories products. , manufacturers must ensure that their products comply with all relevant standards.

 

Standards and Regulatory Requirements

 

At present, the mandatory standards related to luggage products in my country are mainly mandatory standards related to the safety of textile and leather materials, mainly including:

GB18401-2010 "National Basic Safety Technical Specification for Textile Products"

GB20400-2006 "Limits of Harmful Substances in Leather and Fur"

GB19340-2014 "Adhesives for Shoes and Bags".

 

GB18401-2010 "National Basic Safety Technical Specification for Textile Products" is a mandatory national standard.

The textile products referred to in this technical specification include products made of natural fibers and chemical fibers as the main raw materials, which are made by spinning, weaving, dyeing and other processing processes or by sewing, compounding and other processes, such as yarns, fabrics and other products. Manufactured products, which stipulate the basic safety technical requirements, test methods, inspection rules, and implementation and supervision of textile products, applicable to textile products for consumption and decoration produced, sold and used in my country, on August 1, 2011 to be implemented. Therefore, this technical specification applies to luggage products.

 

The basic safety technical requirements stipulated in the technical specifications refer to the most basic requirements put forward to ensure that textile products are harmless to human health, and textile products are divided into three categories:

One is Category A products, namely textile products for infants and young children, which refer to textile products worn or used by infants and young children aged 36 months and below;

The second is category B products, that is, textile products that directly contact the skin, which refer to the textile products that most of the product area is in direct contact with human skin when wearing or using;

The third is Category C products, that is, textile products that do not really touch the skin, which refer to textile products that do not directly contact human skin, or that only a small area of ​​the product directly contacts human skin when wearing or using.

Luggage products belong to category C products, that is, textile products that do not come into direct contact with the skin. The technical requirements for Class C products specified in this technical specification include:

The free formaldehyde content is not more than 300mg/kg, the pH value is between 4.0 and 9.0, and it must not contain azo materials that can decompose 24 kinds of aromatic amines under reducing conditions, no odor, water resistance (discoloration, staining), acid and sweat resistance ( discoloration, staining), alkali perspiration (discoloration, staining) and color fastness to dry rubbing shall not be less than grade 3.

 

GB20400-2006 "Leather and Fur - Limits of Hazardous Substances" Mandatory National Standard,

The standard specifies the limits and detection methods of harmful chemical substances in daily leather and fur products, and divides leather and fur products into three categories:

The first is Class A products, that is, products for infants and young children, which refer to textile products used by infants and young children under 24 months. The technical requirements for Class C products include: free formaldehyde content not greater than 300mg/kg, pH value between 4.0-9.0 , must not contain azo materials that can decompose 23 kinds of aromatic amines under reducing conditions, no odor, water resistance (discoloration, staining), acid resistance and perspiration (discoloration, staining), alkali resistance (discoloration, staining) and resistance The color fastness to dry rubbing is not less than grade 3.

 

GB19340-2014 "Adhesives for Shoes and Bags" National Mandatory Standard,

This standard specifies the adhesive properties, limits of harmful substances and detection methods of adhesives for shoes and bags. The standard stipulates that, except for the adhesives used only for the positioning of bags, the peel strength of the adhesives for bags should not be less than 2.0N/mm. , the content of benzene is not more than 5.0g/kg, the content of toluene + xylene is not more than 200g/kg, the content of n-hexane is not more than 150g/kg, the content of total volatile organic compounds is not more than 750g/kg, dichloromethane, 1,2 The content of halogenated hydrocarbons such as dichloroethane, 1,1,2 trichloroethane and trichloroethylene is not more than 50.0g/kg, and the content of free toluene diisocyanate in the polyurethane adhesive is not more than 10.0g/kg

 

 

Test items

 

Static load test

Simulate the luggage under high load bearing conditions, and test the strength of the handle or shoulder strap of the luggage when it is suspended in the air.

    

Roller/Handle Test

Simulate the strength and durability of the rollers and handles when the luggage is under normal load.

    

drop test

Simulate the bags falling freely at a certain height several times under normal conditions, and then check the appearance and damage of the bags.

    

Tie rod durability test

Simulates the fatigue resistance of the drawbar during raising and lowering.

    

other tests

Material physical property testing

Luggage accessory test