Wet non-woven fabric

Wet-laid nonwoven technology is a new technology for producing non-woven products or paper-bond composites using papermaking equipment and technology. It has been widely adopted in countries with developed economies such as Japan and the United States, forming a large-scale industrialization advantage. The technology breaks through the traditional textile principle, avoids the complicated labors such as carding, spinning and weaving, which has high labor intensity and low production efficiency, and rationally utilizes the wet-laid technology of papermaking to make the fiber disposable on the paper machine. Forming the net to form a product. Greatly reduced labor intensity and increased labor productivity. The technology does not have repeated processing of the fiber raw material, and the fiber short product is directly copied into the fiber product, which can reduce energy consumption, save manpower and material resources, and reduce manufacturing cost. Compared with other fiber product manufacturing methods, it has the following characteristics:

First, it is conducive to small paper production and environmental pollution.

The wet non-woven fabric technology can make full use of the existing papermaking equipment, and can be converted into a non-woven product without major technical transformation. The technology does not generate dust and harmful gases from the feeding process to the whole process of product storage, and does not discharge waste liquid. It is a practical technology for small papermaking to control environmental pollution and develop new products.

Second, it is conducive to water resources protection.

Wet non-woven fabrics produce less water. Water is only used as a transport medium for fibers to be recycled inside the system. It does not discharge to the outside and does not cause damage and waste to water resources. The small paper production process is simple and does not have water recycling facilities, and the production water is directly discharged. The promotion and application of this technology can alleviate the excessive development of water resources by small papermaking and is conducive to water resources protection.

Third, the source of raw materials is extensive.

The wet-laid non-woven fabric has strong adaptability to raw materials due to the technical characteristics of its forming, and can be designed according to the final use requirements of the product, and the fiber raw materials are widely selected. In addition to plant fibers, polyester, polypropylene, vinylon, viscose, and glass fibers can be used. These materials can be used singly or in combination to give the product a special function. There are many manufacturers of raw materials in China, and the raw materials are widely used.

Fourth, the product variety, application fields are wide.

The new fiber products such as wet-laid non-woven fabrics are largely different from woven fabrics and knitted fabrics due to their structural characteristics, and are basically composed of a fiber network (non-yarn network)-like structure. By selecting different fiber raw materials, different processing methods and combining different finishing processes, it is possible to produce non-woven products with widely varying performances and wide applications. Widely used in many fields.

1. Medical hygiene and health care: surgical gowns, caps, masks; patient bed sheets, pillowcases; bandages, plaster cloths, etc.

2. Household decoration and clothing: clothing lining, dustproof clothing, labor protective clothing, dust mask, artificial leather, shoe bottom leather, vacuum cleaner filter bag, shopping bag, sofa cloth and so on.

3. Industrial fabric: speaker sound insulation felt, battery separator paper, glass steel reinforced base fabric, filter material, electrical insulation cloth, cable cloth, tape cloth, etc.

4. Civil engineering, construction: geotextiles, soundproofing materials, heat-proof materials, waterproof material base fabrics, oil felt base fabrics.

5. Automotive industry: vaporizer filter, air filter, insulation felt, anti-vibration felt, molded material, interior decorative composite.

6. Agriculture and gardening: mulch cloth, nursery cloth, pest control cloth, frost-proof cloth, soil insulation cloth.

7. Packaging materials: composite cement bags, grain packaging bags, luggage materials, and other packaging substrates.

8. Others: map cloth, calendar cloth, canvas, banknotes, etc.

5. The market potential is huge and the economic benefits are significant.

The wet-laid non-woven fabric has a fast web forming speed, a short process flow, high labor productivity, and low cost. Its labor productivity is 10-20 times that of the dry method, and the production cost is only 60-70% of the dry method. Has a strong market competitiveness and good economic benefits. At present, the production of wet non-woven fabrics in developed countries has accounted for more than 30% of the total output of non-woven fabrics, and continues to grow. The output of wet non-woven fabrics in China is relatively low, and the preliminary statistics are less than 5% of the total output of non-woven fabrics, which has a larger potential market compared with developed countries.

6. Conducive to resource regeneration and suppression of white pollution.

For disposable products and packaging materials that are prone to white pollution, biodegradability can be enhanced by adding additives, and functional materials can be used to improve their recycling performance and reduce recycling costs. In order to facilitate the recycling of resources and inhibit white pollution.

In short, the wet-laid non-woven technology in China is in the ascendant and has a good development prospect. The development and production of wet-laid non-woven products conforms to the national industrial policy and is in line with the sustainable development plan. It will help to improve overall labor productivity, reduce production costs, and have important economic and social benefits in controlling environmental pollution and rational use of resources.