Regenerated Elastane rPET-based Chemically

2025-04-01News 360

Reasons for recommendation

The fiber expands the sources of raw materials; it contains 34%-36%

post-consumer recycled raw materials; it can reduce carbon emissions

by 60% when compared to traditional elastane; and it can be dyed at

low temperatures, which significantly lowers energy consumption and

environmental burden.

Preparative technique

Using waste polyester bottles as raw materials, polyester glycol is obtained through chemical alcoholysis. This polyester glycol is then used as the main raw material to undergo pre-polymerization and chain extension reactions to produce polyester-based polyurethane and

polyurethane-urea polymer compounds. Subsequently, the fiber is manufactured through a dry spinning.

Features of fibers and finished products

Main Specifications

Filament: 20D/1f, 30D/3f,40D/3f,70D/4f,150D/14f,300D/28f

Relative Standards

Elastane filament yarn (FZ/T54010-014)

Properties of fibers and features of finished products

· Post-consumer recycling provides a richer source of raw materials, and its physical indicators are basically the same as virgin elastane.

. Disperse dyes can be dyed at low temperature (100~110℃), with high soap washing fastness and sublimation fastness.

.Traceable products.

Performance indexes of rpet-based chemically regenerated elastane

Specifications	Breaking tenacity	Elongation at break(%)	Strength at 300% elongation (cN/dtex)	Elastic recovery rate at 300% elongation (%)	Solvent residual rate(%)	Content of post-consumer recycled material (%)	Acid dye dyeing rate (%)
40D	1.36	491	0.61	91.10	0.08	36	≥75

The downstream application guidance

Weaving: Same as conventional elastane.

Dyeing: Disperse dye is dyed at a low temperature of 100~110℃.

Examples of downstream applications of rpet-based chemically regenerated elastane

Terminal field	Raw material ration	Mail products and properties
Specilfication	86% 75D recycle polyester/10% 40D spandex/4% 40D rPET-based post-consumer recycle spandex	Used for business men’s trousers, coat, etc,with eco-friendly and crisp
Sports and leisure	96% 120D polyester/4%40D rPET-based post-consumer recycle spandex	Used for T-shirt, with moisture-wicking,breathable and wear-resistant
Sports and leisure	92%75D polyester/8% 40D rPET-based post-consumer recycle spandex	Used for sportswear, with moisture-wicking,wear-resistant and elastic

Application of fibers

Clothing textiles：Sportswear/Socks/Swimsuit/Yoga clothes

Q: What are the performance highlights and competitive advantages of

rPET-based chemically regenerated elastane?

A: This fiber is a recycled spandex product with part of its raw materials sourced from post-consumer waste PET, addressing the issues such as the instability and limited production of raw materials for pre-consumer recycled spandex.Meanwhile, compared to conventional elastane, this product has the advantage of easy dyeing with disperse dyes at low temperature(100~110℃).The production of 1 ton of rPET-based chemically regenerated elastane can consume 36000 waste PET bottles, and the production process has an significant carbon emission reduction effect, reducing carbon emissions by 60% compared to that of l ton of ordinary elastane.