Development of Non-electronic Moisture Adaptive Smart Textile Materials

At present, non-electronic smart textile materials for clothing which have undergone higher degree of commercialization include Temperature. Adaptive material and Moisture Adaptive materials. Moisture Adaptive smart textile materials. can dynamically adjust corresponding functions according to changes in body and humidity in the environment to increase the level of comfort and safety of the wearer in specific usage situations. Moisture Adaptive smart textile materials mostly consist of fiber products, where Japan Mitsubishi Corporation, Teijin Limited and Taiwan Fu Hsun Fiber Industries Co., Ltd. are the representative manufacturers for this type of materials.

Mitsubishi Corporation: VENTCoolTM Dynamic Conditioning Fiber

Source: Mitsubishi Corporation
Mechanism of Mitsubishi VENTCoolTM Moisture Adaptive Fiber

VENTCoolTM is a Moisture Adaptive fiber launched by Mitsubishi Corporation, which is made by spinning diacetate (strongly hydrophilic) and triacetate (weakly hydrophilic) in a side-by-side bicomponent structure. Under dry conditions, the natural curl of the fiber can reduce the size of pores in fabric and inhibit breathability. When the fiber becomes wet due to sweat, it is temporarily elongated to increase breathability ; This material has been sold in the market for over 10 years, and is, at present, mainly used in skin tight layers of products manufactured by underwear brands (e.g., Wacoal, B.V.D., etc.).

Teijin Limited: Fibaliver® Fiber

Fibaliver® Fiber is another type of Moisture Adaptive fiber launched by Teijin Limited, which is made using the nylon-and-polyester bi-component structure, instead of one-component fiber structure. Fibaliver® Fiber also experiences length differences when it comes into contact with moisture, creating the ability to adjust the size of tissue pores. This material was previously supplied to sports brand Nike and was used in the Nike Aeroreact sportswear series.

Source: Nike, Inc.
Yarn area increases and pores become large when sweating

Source: Nike, Inc.
Pores shrink after sweat evaporates and yarn becomes dry

Moisture Adaptive Smart Textile Materials Launched by Fu Hsun Fiber Industries Co., Ltd. In collaboration with Taiwan Textile Research Institute