May 31, 2021
Toray Industries, Inc.
Highly Breathable Model of LIVMOA™ Disposable Personal Protective Clothing Proven to Reduce Heat Stress
|Tokyo, Japan, May 31, 2021 – Toray Industries, Inc., announced today that evaporative thermal resistance testing has confirmed that the fabric in LIVMOA™3000, a highly breathable model of disposable personal protective clothing, reduces heat stress (see note 1). The company designed this apparel to optimize safety and comfort. Assistant Professor Tomonori Sakoi of Shinshu University’s Faculty of Textile Science and Technology supervised this testing.|
Protective clothing normally increases such stress because it shields the body from the surroundings, impeding heat release. Hot environments in which the risks of heat stroke are high make it hard to dissipate body heat from temperature differences with surroundings, so perspiration becomes the prime means for cooling.
Evaporative thermal resistance testing looks at the ease with which perspiration evaporates and the impact on heat stress. The test found that the Wet Bulb Globe Temperature (WGBT) index, a benchmark for heat stress (see note 2), showed a corrected value of 0° for LIVMOA™3000, the same as for regular clothing, and that this Toray fabric lowers heat stress more during work than general-purpose protective clothing The company accordingly believe that its apparel can help guard against heat stroke.
|LIVMOA™3000 offers greater air permeability than items with equivalent dust protection capabilities. Testing also confirmed that this product is better than counterparts at lowering heat stress when work movements generate air flows inside the garment.|
Project AP-G 2022, Toray’s medium-term management program, has prioritized the Life Innovation Business Expansion Project. That undertaking aims to help boost the quality of medical care, longevity, and public health around the world.
Toray will endeavor in view of the test findings to help materialize safer and more comfortable work environments by marketing LIVMOA™3000 to the manufacturing and construction sectors, where heat protection is essential in summer.
*1: JIS L 1096 measurement using Frazier Method
Gap between sample and wet fabric
Evaporative thermal resistance
This is a general term for the health impacts of high temperatures. The WBGT value evaluates heat stress from hot environments. Exceeding the standard value increases the possibility of heat stroke, necessitating measures to lower that figure.
|2.||Wet Bulb Globe Temperature (WGBT) index|
This benchmark for heat stroke prevention, and is derived from temperature, humidity, and radiation from light. This index is recommended for occupational safety and environmental management in the Outline of Basic Measures to Prevent Heat Stroke in Workplaces, which the Labor Standards Bureau of Japan’s Ministry of Health, Labor and Welfare formulated. WBGT correction values are required according to the clothing worn.
Clothing correction values added to WBGT values according to clothing combinations (JIS Z 8054:2021)
(°C – WBGT)
|Work Clothes||Standard combination garments for woven workwear|
|Single Layer SMS Nonwoven Fabric Binder||SMS used generally to create nonwoven fabrics from polypropylene|
|Single Layer Polyolefin Nonwoven Fabric||Fabrics manufactured from polyethylene through special technique|