Spandex fiber compositions with reduced grin-through effect are provided. Also provided are methods for production and use of these compositions.

Spandex fiber compositions with reduced grin-through effect are provided. Also provided are methods for production and use of these compositions.

The disclosed technology relates to an article, such as a hose, tube, sheet, film, or filament made from a crystalline thermoplastic polyurethane composition, wherein the crystalline thermoplastic polyurethane composition comprises the reaction product of a polyisocyanate component, a polyester polyol component, optionally a chain extender component, and optionally a catalyst. The article is produced by melt or extrusion processes.

The disclosed technology relates to an article, such as a hose, tube, sheet, film, or filament made from a crystalline thermoplastic polyurethane composition, wherein the crystalline thermoplastic polyurethane composition comprises the reaction product of a polyisocyanate component, a polyester polyol component, optionally a chain extender component, and optionally a catalyst. The article is produced by melt or extrusion processes.

A dye composition and a dyeing method for an elastic fabric are provided. The dyeing method includes: (a) providing an elastic fabric which includes an elastic fiber; and (b) immersing the elastic fabric in a dye composition. The dye composition includes an ion modifier and a dye. The elastic fiber of the elastic fabric has a first ion by contacting the ion modifier, and the first ion has a first charge; the dye has a second ion, and the second ion has a second charge opposite to the first charge. The first ion of the elastic fiber and the second ion of the dye together form an ionic bonding.

A dye composition and a dyeing method for an elastic fabric are provided. The dyeing method includes: (a) providing an elastic fabric which includes an elastic fiber; and (b) immersing the elastic fabric in a dye composition. The dye composition includes an ion modifier and a dye. The elastic fiber of the elastic fabric has a first ion by contacting the ion modifier, and the first ion has a first charge; the dye has a second ion, and the second ion has a second charge opposite to the first charge. The first ion of the elastic fiber and the second ion of the dye together form an ionic bonding.

The present disclosure is relates to a TPU optical fiber and a manufacturing method thereof. The TPU optical fiber includes a TPU core layer and a TPU skin layer. The TPU core layer has a first refractive index. The first refractive index is between 1.5˜1.7. The TPU skin layer covers the TPU core layer. The TPU skin layer has a second refractive index. The second refractive index is between 1.4˜1.48. Therefore, the TPU optical fiber of the present disclosure may increase light guide distance, and has good softness, good flexibility, good extensibility, and a wide range for fiber fineness. In addition, the TPU optical fiber of the present disclosure may be easy to proceed for further process.

Non-round or shaped solution spun spandex filaments as well as methods and devices for production of these non-round or shaped solution spun spandex filaments are provided.

Non-round or shaped solution spun spandex filaments as well as methods and devices for production of these non-round or shaped solution spun spandex filaments are provided.

A fibre drawing method for forming a fibre from a low Young's modulus material.