One. material
The influence of materials on physical properties is very large. At present, China's vulcanized shoe additives have developed rapidly. In terms of general materials, it can basically reach the international level of the 1990s, but the quality of materials varies greatly among different dealers and manufacturers. For example, the white carbon black that everyone uses, some cost 7,000 yuan a ton, and some only 5000. If you want to make good physical products, please choose products from regular distributors and genuine manufacturers. What impressed me was that when I was in a foreign-funded enterprise, the testing room used to test the washing of finished shoes in the testing room had to use a brand of detergent from the United States for testing, and it was the same for ten years. Is the quality of washing powder in China bad? No, it's a stability that is being pursued. You may spend a little more for raw materials, but the abnormal reduction in production and fewer defective products is equivalent to saving money. General vulcanized shoe factories often spend the most attention and the most annoyance in solving the abnormal production. Everyone should have the experience of not sleeping at night to deal with the problem.

two. formula
What's missing from China's vulcanized shoe factories? technology! Everyone should feel the same way. In order to find a good master, they all require people. For a good formula, they also need to spend a lot of money! Please do not come full time, please part time.
An excellent vulcanized shoe formula must meet three basic requirements at the same time: the best balance of physical properties, cost and processability.
Only after several optimizations and mass production tests can the formula composition be finalized.
Formulation design is a very complicated task. The formulator needs to reasonably select the main glue and compounding agent according to the required physical properties. At the same time, the designer is required to be familiar with the characteristics of various operating machines to comprehensively consider, and also consider environmental protection And other factors. At present, China's overall formulation technology level is 30 to 40 years behind the international level. Because our technology industry was blank before liberation, and after the liberation, we suffered from the Cultural Revolution and other incidents. When we looked back, we found that we were far behind.