Dope-Dyed Polyester Staple Fiber

Shanghai Different Advanced Material Co., Ltd. is one of the leading manufacturers and suppliers of dope-dyed polyester staple fiber in China. With abundant experience, we are committed to providing high quality custom service for global clients. Welcome to wholesale premium dope-dyed polyester staple fiber made in China here from our factory.

 Product Overview

 

This dope-dyed polyester staple fiber is produced by mature melt spinning with in-melt coloration, compatible with conventional spinning and nonwoven production lines for smooth processing. Pigments are evenly distributed throughout the fiber matrix, featuring excellent high color fastness. High light-stable grades are available, with fiber resistance to sunlight exposure up to 1000 hours. Lot-to-lot shade variation is well controlled, making it suitable for long orders shipped in batches. We maintain a broad shade library and offer custom color matching against customer swatches. Cross-section and crimp profile are configurable, and both virgin and recycled PET grades are available. Downstream mills can spin and fabricate directly with this colored fiber, skipping dyeing and reduction clearing steps. It cuts water and steam consumption, shortens lead time and reduces wet-processing cost.

 

 Technology Principle

The masterbatch has three parts, pigment at 20% to 50%, a carrier resin, and a dispersing aid. Metered with the chips, it is sheared down to micron-scale particles that leave through the spinneret with the melt, so pigment spreads across the whole cross-section rather than sitting on the surface.Spinning Dope-Dyed Polyester Staple Fiber starts with chips dried below 30 ppm moisture, metered against masterbatch, then melt-extruded, spun, quenched, drawn, crimped, and cut. Masterbatch raises melt viscosity slightly, so temperature and filter fineness are adjusted accordingly.Fastness follows from where the pigment sits. Rubbing and washing reach only the surface, and the color is embedded inside. Selected pigments feature excellent light resistance, migration resistance and acid & alkali resistance. The high light-stable formulation can withstand 1000 hours of sunlight exposure.What disappears is the dyehouse step: no dye vessel, no reduction clearing, less water and steam consumption. The actual saving varies by fabric type and mill process, so manufacturers may calculate based on their own production lines.

1) Dope-Dyed PLA Staple Fiber avoids limitations of wet finishing: No disperse dyeing, alkaline treatment or reduction clearing required. It maintains good color fastness and fiber strength without PLA hydrolysis damage. It also solves PLA's inherent deep-dyeing difficulty: conventional high-temperature disperse dyeing cannot produce deep shades without causing hydrolysis, while dope dyeing delivers rich, uniform color across the full shade range.

2) Bio-based & industrially compostable: Derived from annual crops such as corn and sugarcane, it can degrade under industrial composting conditions (≥58℃) for low-carbon performance.

3) Lightweight with high loft: Density around 1.25 g/cm³, roughly 10% lighter than polyester. Products deliver better bulkiness at the same weight, ideal for pillow filling, cushion stuffing and plush toy fiber.

4) Low-energy spinning: Spinning temperature at 210–240℃, consuming less energy than dope-dyed polyester fiber.

5) Customizable options: Fineness, cut length, shade, profiled cross-section and 3D crimp can be tailored to your requirements.

Applications

1) Apparel & workwear: Outdoor garments, sportswear, uniforms and knitted fabrics. High light-stable grade resists fading under long-term sunlight exposure.
2) Home textiles: Curtains, upholstery fabrics, carpets, cushions, quilt and pillow filling, maintaining consistent color under sunlight.
3) Automotive interiors: Seat fabric, headliner, car carpet, acoustic felt and trunk trim, demanding reliable weather resistance and uniform shade.
4) Outdoor products: Outdoor furniture filling, awnings, tents, geotextiles and patio mats. The 1000h light-resistant grade is recommended here.
5) Nonwovens: Colored nonwoven fabric, acoustic felt, filter substrate, pet beds and plush toy filling.

 

Sustainability & Certifications

 

Global Standards & Audit

 

Working closely with international certifi ation bodies.

We cooperate with international certification bodies and independent third-party auditors to maintain full compliance with GRS, RCS and OEKO-TEX® Standard 100 requirements for our textile fiber materials.

GRS
Global Recycle Standard

RCS

Recycled Claim Standard

OEKO-TEX®

Standard 100

 

STATE-OF-THE-ART OPERATIONS

Shanghai Manufacturing Facility 

Our Shanghai manufacturing facility operates under strict ISO 14001 environmental management and ISO 50001 energy manag!ement systems. Recognized as a National Green Factory, we are committed to sustainableig throughout ourproduction, energy efficiency, and low-carbon manufacturi throughout our operations.

 

ISO 14001

Environmental Mgt

 

 

ISO 50001

Energy Mgt System

 

 

National Gree 

Factory Certified