Promoted by Grasim Industries and local Thai entrepreneurs, Thai Rayon was incorporated in 1974. Thai Rayon is the pioneer as well as sole manufacturer of viscose staple fibre (VSF) in Thailand and is listed on the Thailand Stock Exchange since 1984.

Thai Rayon currently produces 110,000 tpa of VSF and has a 30,000 tpa VSF expansion project scheduled to be commissioned by mid 2008. Thai Rayon now has the capability to produce 13,000 tpa of next generation cellulosic fibre - modal fibre, besides regular VSF. Also scheduled for commissioning by mid 2008 is its 20,000 tpa natural gas based CS₂ project, meant to cater to its increased requirement of CS₂ as well as eliminating dependence on scarce woodcharcoal. With its four flexible VSF production lines, Thai Rayon caters to the demands of both textile and non-woven applications, producing VSF varieties in the range of 0.8 to 5.0 denier, staple lengths in the range of 32 mm to 101 mm, lustre of bright bleach, semi-dull or full-dull, and also for chlorine- free and anti-bacterial applications.

More than 50 per cent of Thai Rayon's VSF throughput is directly exported to more than 20 countries worldwide. The VSF marketed under the brand 'Birla Cellulose' meets the stringent quality expectations of customers in USA, Mexico, Europe, Turkey, Canada, Israel, Australia, South Korea, Philippines, Indonesia, Pakistan, Bangladesh, Sri Lanka and Middle-East.

Thai Rayon also produces about 85,000 tpa of Anhydrous Sodium Sulphate as its by-product, which is widely used by detergent, pulp, glass, leather and textile industries.

Thai Rayon has significant investments in backward and forward integration projects in Thailand, Indonesia, Laos, China and Canada, as well as several diversification projects in Thailand and Egypt.