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May 14, 2021

Environmentally friendly soles shoe footwear,polyurethane

It breaks the shortcomings of traditional rubber and EVA soles. It has the advantages of lightweight and environmentally friendly recycling. It can also use 3D printing to achieve customized and personalized design of shoes, helping the PU shoe industry to enhance the competitiveness of the industry. It is the PU midsole application that Zhejiang Huafeng New Materials Co., Ltd. under Huafeng Group has been researching and developing with great concentration in recent years.

Recently, Huafeng New Materials brought PU (polyurethane) midsole application innovation trend program to the 2019 Fourth International Footwear Innovation Summit (F.I.S), which has attracted the attention of many footwear brands from all over the world. At the moment, many footwear brands such as New Balance, Anta, and Peak are offering Huafeng an olive branch. It is reported that the F.I.S summit is a key channel connecting footwear brands and manufacturers, and fills the gap between different industries.

Overcome PU weight

The sole is "light as a feather"

According to reports, Huafeng New Materials combines PU materials with PU midsole lightweight, 3D printing, and environmentally friendly recycling technology, and proposes a development plan for the innovative trend of PU midsole applications, which will make up for the gap in the development of the downstream PU shoe industry. Two years later, PU midsole applications will achieve preliminary mass production.

"Rubber and EVA are commonly used in the global shoe industry, while PU only accounts for 9% of the total global production of shoes, which shows that the market share is extremely low." Huafeng New Materials Marketing Manager Xu Xu said, the reason is PU material It is heavier than EVA, which reduces the comfort level. This shortcoming makes PU unable to make a big splash in the footwear market.

However, PU has hydrolysis properties, and its environmental protection performance is unmatched by rubber and EVA. In other words, as long as the PU midsole is lightweight, PU midsole applications will have unlimited market space.

Three years ago, Huafeng New Materials formed a R&D team of more than 30 people and overcome this problem in the second half of last year.

"Our team has developed suction film negative pressure technology, which reduces the molding density of PU midsole by 20% compared with traditional technology." Xu Xu said, the density of PU midsole was gradually reduced from 0.35g/cm3 to 0.25g/cm3, to 0.23g/ cm3, the weight of PU is realized; and the rebound rate is 65%, which is much higher than EVA; the compression set rate is 5%, which is much lower than EVA. This means that the PU midsole is more comfortable than EVA and the appearance is more stable.

Install "accelerator" for PU

Realize recycling and 3D printing

If lightweight makes PU and EVA stand on the same starting line, Huafeng's research and development of environmentally friendly recycling and 3D printing applications for PU midsoles is like installing an "accelerator" for PU, which greatly enhances the competitiveness of the PU shoe industry. , So that it outperforms the competition in the shoe material industry.

In Huafeng New Materials, the reporter saw a pair of colorful PU soles. "This is the PU midsole produced from PU waste." When the reporter took the PU soles handed over by Xu Xu, the first feeling was "light as a feather." Xu Xu said that the production process must always pay attention to the filling rate, resilience and density of the waste. The most important thing is the coordination of the particle size and the pouring speed of the pouring system on the machine.

At the same time, Huafeng New Material combines the PU midsole with 3D printing technology to realize the customized and personalized design of shoes. According to reports, this technology is based on digital model files and uses adhesive materials to construct objects through layer-by-layer printing. Through 3D printing technology, PU midsole manufacturing speed will be much faster than traditional manufacturing.

Technological innovation drives development

Add power to the PU shoe industry

"PU midsole application innovation trend program is the innovative masterpiece of Huafeng New Materials based on the concept of corporate responsibility and sustainable development." Huafeng New Materials R&D Manager Zhao Yebao said that the introduction of this program has further enriched PU footwear products The matrix adds new impetus to the development of the PU shoe industry, helping the PU shoe industry to enhance its competitiveness in the industry, so as to create more new business opportunities and new development.

Technological innovation is Huafeng Group's "winning magic weapon" for optimizing existing industries, making full supply of industry chain articles, and building an efficient and collaborative industrial system. At present, Huafeng Group has 1 national enterprise technology center, 1 national postdoctoral workstation, 1 provincial key enterprise research institute, 2 provincial research institutes and 8 R&D sub-centers. As of the end of 2018, Huafeng's 10 leading products had 330 national authorized patents, 120 international national industry standards were issued and implemented, and more than 100 internationally advanced, domestically leading and provincial new product certifications.

In the future, Huafeng Group will continue to strengthen the training of technological research and development capabilities with a multi-level and open technological innovation system of "one point, multiple cores, open collaboration", and is committed to the success of customers innovating, increasing differentiation, high-end and The research and development of environmentally friendly products will continue to enhance the core competitiveness of the company and drive the high-quality development of the industry.

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