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What is "Wet-laid" - Definition & Explanation
Last Updated on: 01-Mar-2023 (1 year, 2 months, 28 days ago)
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Wet-laid

Wet-laid is a textile manufacturing process that involves the creation of nonwoven fabrics using a wet method. It is a versatile technique that allows for the production of fabrics with various properties and applications. Wet-laid fabrics are known for their strength, durability, and excellent uniformity.

History and Origin

The wet-laid process has its roots in ancient papermaking techniques, which date back thousands of years. The process involved creating a suspension of fibers in water, forming a wet sheet, and then pressing and drying it to obtain a flat, coherent material. Over time, the wet-laid method evolved and found applications in textile manufacturing.

Types of Wet-laid Fabrics

There are several types of wet-laid fabrics, each with its unique characteristics and applications:

  1. Pulp-based Wet-laid Fabrics: These fabrics are produced by suspending wood pulp or other plant fibers in water, forming a wet sheet, and then bonding the fibers together using mechanical or chemical methods. Pulp-based wet-laid fabrics are commonly used in products such as wipes, absorbent materials, and filtration media.
  2. Synthetic Fiber-based Wet-laid Fabrics: In this type, synthetic fibers such as polyester or nylon are dispersed in water, and then a wet sheet is formed and bonded. These fabrics find applications in industries such as automotive, geotextiles, and construction for their strength, durability, and resistance to chemicals and abrasion.
  3. Mixture of Fibers Wet-laid Fabrics: These fabrics are created by combining different types of fibers, such as natural fibers (cotton, flax) and synthetic fibers (polyester, polypropylene), in a wet-laid process. The resulting fabrics exhibit a blend of properties and are used in various applications, including apparel, home textiles, and industrial applications.

Tips in Handling Wet-laid Fabrics

When working with wet-laid fabrics, certain tips can help ensure successful handling and processing:

  • Proper Moisture Control: Maintain proper moisture levels during the manufacturing process to achieve consistent fabric properties and prevent issues like drying defects or uneven bonding.
  • Controlled Temperature and Humidity: Maintain an optimal temperature and humidity level in the production environment to prevent fiber clumping, improve sheet formation, and ensure uniformity in the resulting fabric.
  • Selection of Fiber Types and Blends: Carefully select the appropriate fiber types and blends based on the desired fabric properties and end-use applications. Consider factors such as strength, absorbency, and chemical resistance.
  • Optimization of Bonding Methods: Choose the most suitable bonding method for the wet-laid fabric, whether it's through mechanical means, chemical additives, or thermal processes. This will ensure proper fiber entanglement and fabric integrity.

Top International Users and Manufacturers

Several leading international companies are renowned for their expertise in wet-laid fabrics. Here are some of the top users and manufacturers:

  1. DuPont: DuPont, a global science and engineering company, produces wet-laid fabrics for various applications, including filtration, medical products, and industrial uses.
  2. Ahlstrom-Munksj: Ahlstrom-Munksj specializes in the production of high-performance fiber-based materials, including wet-laid fabrics used in applications such as filtration, food packaging, and industrial applications.
  3. Freudenberg Performance Materials: Freudenberg Performance Materials manufactures wet-laid fabrics for a wide range of industries, including automotive, construction, and hygiene products.
  4. SWM International: SWM International offers wet-laid fabrics for filtration, medical, and specialty applications, providing solutions for various industries and sectors.
  5. Lenzing: Lenzing is a global leader in the production of sustainable fibers and textiles, including wet-laid fabrics used in medical and hygiene applications.

Conclusion

Wet-laid is a versatile textile manufacturing process that produces nonwoven fabrics with exceptional strength, durability, and uniformity. Its origins in ancient papermaking techniques have paved the way for its evolution and widespread use in modern textile production. With various types of wet-laid fabrics available, the industry benefits from the ability to create customized fabrics for diverse applications. Effective handling and processing of wet-laid fabrics, along with the expertise of top international users and manufacturers, ensure the production of high-quality materials for a range of industries.


Wet-laid
Formation of a non-woven fabric by suspending fibers in water to disperse them evenly. The suspension is poured onto a moving screen allowing the water to pass through and leaving a fiber web, which is then dried to form the fabric.

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