Chinese and foreign footwear industry's severe market environment

Chinese and Foreign Footwear Kyushu Looks Around National Light Industry Bureau Leather and Shoemaking Machinery Quality Supervision and Inspection Center Launched “Leather and Shoemaking Machinery Quality Tracking” activities In recent years, with the improvement of people’s living standards and the transfer of developed countries’ leather industry to developing countries, China's leather and leather products processing industry has rapidly developed and matured. In particular, the footwear industry has become the "kingdom of the footwear industry" with international emphasis on "foot". Driven by these industries, the progress of technology, variety, quality, precision, stability and reliability of related enterprises and products in leather and shoemaking machinery in China is changing with each passing day, and the comprehensive technical performance of many leather machines and shoe machines has been improved. Close to the technical level of similar foreign products. The practice of extracting benefits at the expense of children's foot health will certainly be condemned by the public. We hope to pay attention to this issue from the research, design, production and sales of shoes, respect science, raise awareness, and improve laws and regulations.

For a long time, China's leather and shoe manufacturing industries have been plagued by uneven and unregulated competition and have seriously hampered the development of the entire industry. At the same time, users have become overwhelmed when choosing domestic equipment. Therefore, in addition to further improving the quality and technical content of China's leather and shoemaking machinery, we establish the user's confidence in the quality of domestically produced equipment and after-sales protection, further improve the market competition environment, carry out promotional activities such as packaging and publicity, and properly guide The purchasing consciousness of users is an urgent issue for the leather and shoe making machinery manufacturing industry in China.

China’s final WTO entry is a foregone conclusion, and the trade barriers to China’s light textile products entering the WTO will soon be eliminated, while the measures taken by the Chinese government to impose tariffs on imported goods (including leather shoemaking machinery) to protect ethnic products will gradually cancel. The potentially huge market makes foreign leather and shoemaking machinery manufacturers actively plan marketing strategies including quality, service, promotion and price factors in order to expand China’s market share. Therefore, the meaning of WTO is an opportunity and a challenge for China's leather and shoemaking machinery industry. However, although China's leather machine and shoe machine products have absolute superiority in price performance, they are far from competitors in foreign counterparts.

The “National Light Industry Bureau Leather and Shoemaking Machinery Quality Supervision and Inspection Center” is the sole and most authoritative professional quality inspection and appraisal agency in China's leather and shoemaking machinery industry. It actively responds to Zhu Rongrong’s current severe market environment and new opportunities. Premier Ji launched the "brand strategy" spirit of instruction and the National Quality and Technical Supervision Bureau's work policy of "fighting and assisting others". He decided to promote the "quality tracking of leather and shoe-making machinery" activities throughout the country and will continue the activities for a long time. , And then based on this survival of the fittest, resulting in "made of leather, shoe-making machinery quality products."

Supporting national industries, publicizing and promoting national brands, enabling users to understand the technical performance of domestic brands, in order to achieve the domestic high-quality brands to become the user's preferred product, to meet the "WTO accession" challenge.

The cold sticking process cold sticking process includes the manufacture of the bottom and the rib and the assembly of the parts into a whole shoe. Bonding two materials or components into a unit is called bonding, and bonding with a glue under non-heated conditions is called cold-sticking, and the bonding targets are the bottom and the bottom. The penetration of the adhesive into the adhered body is called anchoring. The anchoring can be regarded as physical fixation. At the same time, the glue reacts with the surface of the adherend to form a chemical bond. Therefore, cold sticking is a combination of both physical and chemical processes.

Adhesive materials Adhesives, hardeners, and surface treatment agents are used in the cold glue process. Adhesives Adhesives, commonly known as glues, act as an adhesive interposer in the adherend (bottom-bottom or cleave-bottom). Adhesives are divided into two major categories based on chemical composition: CR and PU. The ideal adhesive should have good wettability to the adherend, high cohesive force to form a strong bond, meet the adhesive force requirements, and have the flexibility and rigidity at the adhesive interface to form a bond, water resistance, Resistant to oil, weather, etc.; Has certain resistance to ester plasticizers that migrate from the substrate, achieving no discoloration, no pollution, stable storage, easy spreading, high initial tack, fast drying, non-toxic or low Poison and longer tack retention and other performance requirements.

CR adhesives are traditional adhesives with a wide range of applications. CR molecular structures have strong negative chlorine atoms that can provide the polarity needed for bonding. With the participation of isocyanate curing agents, CR adhesives are at room temperature. Can complete the bonding. The main material of CR adhesive should be adhesive CR. These varieties have the characteristics of fast crystallization and fast curing.

In addition to the adhesive CR in CR adhesive formulations, other components include cross-linking agents, accelerators, antioxidants, and tackifying resins. Commonly used solvents are **. In the pulping process, the hardly dispersible components such as zinc oxide, magnesium oxide, and white carbon black are added first, and after mixing, they are cut into strips, dissolved in a pulper, and then added with other components, and then stirred. Pulp.

CR/methyl methacrylate (MMA) graft adhesive adhesive graft copolymer, its appearance was transparent yellow, viscosity 23Pa # s. CR/MMA grafted adhesives have a wider range of application than CR adhesives. They can be used in PVC and ethylene vinyl acetate (EVA) in addition to rubber and leather. If the third component SBS (styrene-butadiene block copolymer) is introduced, the resulting CR/MMA/SBS ternary graft adhesive can also be used for SBS bottom bonding. Due to the presence of PM-MA (polymethyl methacrylate) branches in the CR/MMA molecular structure, it can be transesterified with ester plasticizers in PVC to produce higher-grade polyesters that are soluble in rubber and suppress the growth. The plasticizer migrates to the bonding interface.

PU adhesives are generally two-component, a component of the binder is a chain-extended terminal hydroxyl linear molecule; B component is an isocyanate, such as methylene diphenyl diisocyanate (MDI) and diisocyanate ** ester (TDI).

The role of curing agent curing agent is to crosslink the macromolecule chain of the adhesive and eventually become a cohesive and heat-resistant adhesive layer. The curing agent for footwear is a solution with 34 isocyanate group compounds. The solvent is a chlorohydrocarbon (dichloroethane) substance that can effectively crosslink at room temperature. The amount of curing agent is 5% of the amount of glue used. Common curing agents are JQ-1 (triphenylmethane triisocyanate) and other varieties.

Surface Treatment Agent The surface treatment agent is referred to as a treatment agent and is an intermediate layer that helps the adhesive and the adhered object come into contact with the surface of the adherend before the adhesive is applied. Commonly used surface treatment agents are classified into two types: solids and solids-free. The latter is a good solvent for adherents. It is generally a mixed solvent and can effectively clean the surface of the adherend and remove grease. The former is not only free from solids. In addition to the characteristics of the physical treatment agent, it also has the function of enhancing the reaction activity and preventing the migration of the plasticizer, and it can form a chemical bond with the adhesive and the adhered material as a transition layer. The selectivity of the treatment agent is very strong and should be selected according to the different types of materials to be adhered. The solids-containing treatment agents include chlorine-containing polymers and synthetic resins, and the supplier will not disclose its chemical composition.