半はん合ごう成せい繊せん維い

Meanings

1

noun

semi-synthetic fiber

Technical term for fibers made from naturally derived polymers that have been chemically modified, such as rayon or acetate.

slender, fine, thin kimono

維fiber, tie, rope

合ごう成せい繊せん維い
合成繊維 (synthetic fiber) is made entirely from synthetic polymers, while 半合成繊維 uses chemically modified natural polymers.
天てん然ねん繊せん維い
天然繊維 (natural fiber) is used directly from plants or animals without chemical modification, unlike 半合成繊維.

Compound of 半 (half, semi-), 合成 (synthesis, synthetic), and 繊維 (fiber). The term is a direct calque of English 'semi-synthetic fiber'.