Table 1.

Details of the yarn specimens used in this study.

Yarn No.	Yarn Type	BlendRatio (%)	Spinning Method	Yarn No. ( dtex)	Twist		Fiber (Filament) Used	Period of Biological Decay in Soil (Month)
					TM tpi/$\sqrt{\mathbf{N}\mathbf{e}}$)	Spindle (rpm)
(1)	PP/Tencel S/C	PP: 39.3/ T: 60.7	Sheath/core	147.5	4.53	7000	PP DTY 30d/24f and Tencel S/F	PP: no decay T: 3-4
(2)	PET/Tencel Siro-fil	P: 44.4/ T: 55.6	Siro-fil	147.5	4.12	9000	PET DTY 55d/216f and Tencel S/F	P: no decay T: 3-4
(3)	Tencel Siro-spun	T: 100	Siro-spun	147.5	4.42	11,000	Tencel S/F	T: 3-4
(4)	Coolmax/TencelS/C	C: 39.3 T: 60.7	Sheath/core	196.7	4.34	9000	Coolmax 50d/36f and Tencel S/F	C: no decay T: 3-4
(5)	Coolmax/ BambooSpun	C: 48.6/ B: 51.4	Ring-spun	196.7	3.82	12,000	Coolmax/bamboo S/F	C: no decay B: 3-4
(6)	PET/Tencel Siro-fil	P: 44.4/ T:55.6	Siro-fil	196.7	4.12	9000	PET DTY 55d-216f and Tencel S/F	P: no decay T: 3-4
(7)	Bamboo spun	B: 100	Ring-spun	196.7	3.82	12,000	Bamboo S/F	B: 3-4
(8)	* Hi-multi PET	P: 100	-	83.3	-	-	PET DTY 75d/144f	no decay
(9)	* PP filament	PP: 100	-	111.1	-	-	PP DTY 100d/48f	no decay

Note: S/F: staple fiber, T: Tencel, *: existing filament. PP: polypropylene, C: Coolmax. P: PET, B: bamboo, DTY: draw textured yarn.