"Two-component spunbonded nonwoven technology seminar" held in Nanhai

In recent years, driven by the demand of the downstream market, spunbonded nonwoven fabric enterprises actively adjust the product structure to diversified, differentiated and proprietary development, and the two-component spunbonded nonwoven fabric has received widespread attention.

According to the development trend of domestic two-component spunbonded nonwoven fabric technology, under the support of the Nanhai District Medical and Health Products Industry Association of Foshan City, Guangdong Province and the China Medical and Health Weaving Products Demonstration Base, on January 20, 2019, the Chinese industry The textile industry association spunbond non-woven fabrics branch teamed up with the US representative office of Hills in the South China Sea in Foshan to hold the "bicomponent spunbond nonwoven technology seminar", on the domestic and international two-component spunbond technology The topic of the dynamics, current situation and various problems in practice was discussed.

Chen Lidong, president of the spunbond non-woven fabric branch of China Industrial Textiles Industry Association, Deng Weiqi, president of Foshan Nanhai District Medical and Health Products Industry Association, attended the meeting, Jiujiang Town Government Investment Promotion Bureau, Guangdong Nonwovens Association, China Medical and Health Weaving product demonstration base, as well as foreign companies such as Reifenhauser Plastics Machinery (Suzhou) Co., Ltd., Berry Group Nanhai Nanxin Company, Dongguan Meiya Company, etc. were present. More than 20 representatives from 18 enterprises including Dalian, Liaoning Tai'an, Hubei Xiantao, Jiangxi Ji'an and Guangdong, and equipment manufacturing and coil production attended the meeting.

At the symposium, Zheng Gongwei, a senior engineer at the China representative office of Hills, USA, introduced the main features of the two-component composite spinning technology, equipment technical requirements and bicomponent spunbonded nonwoven products at home and abroad. An overview of the field of application.

Hills' two-component technology has entered China in 1994. Since 2005, many domestic two-component key production equipment have adopted Hills technology. According to Zheng Gongwei, in addition to the two-component technology, the current three-component and four-component technologies have entered the practical stage. He demonstrated the shape and use of various fiber cross-sections on-site, and even used patterns with anti-counterfeiting marks in banknotes. He said: "In the development of this technology, imagination is more important than experimentation, and any shaped cross-section that can be imagined The structural multi-component fibers can be designed and manufactured, and the variety of products is sufficient to meet the requirements of various fields."

In addition to a variety of domestically produced models, equipment manufacturers and coil companies participating in the symposium also include equipment using German, American and Japanese technologies. The product types include sheath core type, side-by-side type, split type, etc. The main polymer raw materials used are PP, PE, PET, PA and related modified polymer raw materials, which basically reflect the two-component spunbond nonwovens in China. The status quo in the field of cloth.

Participants exchanged ideas and experiences on the development of two-component technology or the application of two-component technology.

At present, China's two-component spunbond nonwoven products are mainly used in: sanitary, medical products, wipes, filter materials, leather fabrics, beauty masks, new energy, automotive interiors, carpet base fabrics, wallpaper and other fields.

According to the requirements of the drafting speed of different polymer raw materials, the spinning system adopts three technologies of "wide slit low pressure drafting", "tube drafting" and "wide slit positive pressure drawing". According to the application field of the product, the consolidation methods of the fiber mesh are: hot rolling, hydroentanglement, needle punching, hot air and other processes, and some production lines are also equipped with two kinds of fiber mesh consolidation equipment.

Since the defective products of the two-component products are not suitable for recycling, and some raw materials are subjected to drying treatment, a positive pressure drafting process with higher energy consumption is also used, and the manufacturing cost of the products is also high. These are all negative factors that affect the competitiveness of the product market. Therefore, entering the two-component field does not necessarily have to enter the health products market. Relevant enterprises must avoid the homogenization market and develop differentiated market segments that meet the characteristics of their products.

According to statistics, after nearly two decades of industrialization development, about 19 companies in China currently have two-component spunbond production lines, and there are 28 production lines with 12 brands (including complete sets of introduction and under construction). Among them, sheath-core type (S/C) accounted for 32.2%, side-by-side (S/S) accounted for 28.6%, split type (SP) accounted for 32.1%, and mixed fiber type accounted for 3.6%.

Of the 28 production lines, 11 are under construction and it is expected that a production capacity of 175,000 tons will be formed in 2019 or the first half of 2020. Among them, 36.3% were two-component sheath core type, 36.3% were side-by-side type, 18.2% were two-group split type, and 9.1% were three sets of split pieces. It can be seen that the new production line has not been used to squeeze the “single bridge” for side-by-side products for sanitary products.

At the meeting, it was generally believed that China has achieved remarkable results in the softening technology of ordinary spunbond products, and has strong viability in the field of hygiene products. In terms of production capacity, product cost, and market segment requirements, two-component products, staple fiber hot air products, and pure cotton spunlace products do not have the ability to fully cover and replace the traditional spunbond product market. Therefore, there will be no two-component products, especially the side-by-side product "out of the box" situation.

Although China's two-component technology has achieved considerable development and domestic equipment has improved, it still needs to be in the core technology and equipment, such as bicomponent spinning box, spinning assembly, wide slit positive pressure drafter. Breakthrough, key equipment needs to be imported from the United States, Germany, Japan and other countries. Secondly, most of the two-component coil producers still lack basic knowledge of chemical fiber spinning, and the corresponding technological strength is weak. It is difficult to achieve “professional problems” in the production process and become a technological advancement and win. The "bottleneck" of economic efficiency.

China's two-component spunbonded non-woven fabric equipment has both a full set of imported equipment, a product that digests and absorbs foreign technology, and a model developed independently from other technologies. Not only in equipment technology, but also has patents registered abroad. In this respect, two-component products have also registered patents abroad. All of these will be protected by the corresponding patents.

Therefore, at the symposium, we specifically talked about the issue of intellectual property protection. We must make full use of existing regulations and protect ourselves. Also remind some domestic enterprises, or some sensitive items in related projects, do not touch this "high-voltage line", pay attention to and avoid these risks, and create a safe and harmonious development environment for enterprises.

At the symposium, everyone realized that technological innovation is the development trend, and eliminating backward production capacity is also the inevitable development, and the coexistence of different technology iterations will be a long-standing normal phenomenon. Two-component spunbonded nonwovens have a wide range of applications, and the development of differentiated, distinctive, and even customized, personalized products is a measure of their own characteristics and avoiding structural overcapacity.

During the meeting, delegates visited Nanhai Bideford's 7-meter-wide SMS two-component production line construction site and other production sites.