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2.8D*32MM PBT PET Composite Staple Fiber, Latent Crimp High Elastic Fiber for Knitting Apparel Excellent Spinnability filling Fiber

Name: 2.8D*32MM PBT PET Composite Staple Fiber, Latent Crimp High Elastic Fiber for Knitting Apparel Excellent Spinnability filling Fiber
Brand: Guangzhou Octopus Fiber Co.,Ltd.
SKU: 2.8D*32MM
Availability: InStock

Brand Name:	Octopus fiber
Model Number:	2.8D*32MM
MOQ:	Starting from 1 ton
Price:	Free samples sent
Payment Terms:	D/P,L/C,D/A
Supply Ability:	Customized according to the quantity required by your company

Detail Information

Product Description

Detail Information

Place of Origin:

China

Certification:

113255628

Name:

PBT Mixed PET Composite Fiber

Specification:

2.8D*32MM

Native/Regenerative:

Native

Color:

White

More Sizes:

Customizable

Siliconized/non-silicified:

Silicified

Packaging Details:

bundle

Product Description

2.8D×32MM PBT PET Composite Staple Fiber

PBT mixed PET composite fiber
2.8D×32MM
Specifications can be customized

Product Overview

Our 2.8D×32MM PBT PET side-by-side bicomponent composite staple fiber is a mature cost-effective elastic functional textile raw material, engineered to combine PBT's superior soft stretch and PET's stable durable performance in one fiber structure. It solves three major industry points: high cost of spandex, poor elasticity of ordinary PET, and low dimensional stability of pure PBT fiber, becoming a mainstream stretch raw material for global knitting and weaving factories.

The core side-by-side melt-spun design locks PBT and PET tightly at the molecular interface without delamination or splitting during drawing, spinning and post-processing. Latent crimp is activated simply via standard heat-setting after spinning, forming uniform compact 3D curls that create fluffy bulk and consistent stretch across every yarn batch.

Technical Specifications

Product Item	Detailed Parameter
Product Name	Side-by-Side PBT PET Bicomponent Composite Staple Fiber
Spec	2.8D × 32MM fixed uniform cut length
Spinning Structure	Side-by-side bicomponent melt-spun, PBT & PET dual polymer bonded structure
Raw Material	100% virgin PBT & virgin PET polymer chips, no recycled mixed scraps
Natural Color	Pure bright white, free of impurities, spots and residual processing agents
Core Mechanism	Latent thermal crimp from different thermal shrinkage rates of PBT and PET
Elastic Recovery Rate	≥90% after stretching, stable resilience dry & wet condition
Dyeing Feature	Normal pressure boiling dyeable, no carrier needed, bright full color shade
Breaking Tenacity	≥3.4 cN/dtex, stable tensile strength for high-speed spinning
Boiling Water Shrinkage	Controllable crimp shrinkage via heat setting, finished fabric low deformation
Crimp Performance	Heat activated dense three-dimensional crimp, fluffy bulky hand feel
Processing Adaptability	Ring spinning, open-end spinning, blended spinning, nonwoven production
Package	25kg moisture-proof woven bag, pallet stacked for bulk sea shipment
Main Application	Elastic knitwear, faux wool sweaters, stretch socks, sportswear, home textile, upholstery fabric

Core Advantages

1. Latent Self-Crimp Bicomponent Structure, Permanent High Resilience

Made by side-by-side co-extrusion spinning of PBT and PET with different thermal shrinkage coefficients. After heat setting, natural dense 3D crimp forms automatically, delivering lasting stretch and rebound performance. Elastic recovery above 90%, far superior to ordinary single PET fiber; serves as economical spandex replacement without yellowing or aging defects of spandex.

2. Balanced Softness & Structural Strength, Perfect PBT+PET Synergy

PBT component brings ultra-soft, silk-like hand feel, excellent flexibility and wear resistance similar to nylon; PET reinforces dimensional stability, heat resistance and tensile strength to offset PBT's high-temp weak rigidity. The composite fiber combines the best of both polymers: fluffy soft touch, tough tensile performance, wrinkle-free and shape-retention for finished garments.

3. Normal Pressure Easy Dyeing, Bright Color & Stable Color Fastness

Unlike pure PET requiring high-pressure high-temp dyeing, PBT PET composite fiber achieves vivid, saturated color under atmospheric boiling water with regular disperse dyes, no expensive carrier additives needed. Color fastness to washing, rubbing and sunlight reaches Grade 4-5; dyed fabrics maintain consistent shade batch to batch.

4. Standard 32MM Uniform Cut, Excellent Full-Scale Spinnability

Precision fixed 32mm cotton-type cut with neat incision, ultra-low broken filament and flying waste during high-speed carding and spinning lines. Fiber bundle holds good cohesion and fluidity, runs smoothly on all mainstream spinning equipment with low yarn breakage rate, boosting production yield and lowering factory loss cost.

5. Cost-Effective Stretch Solution, Lower Total Production Cost

Much more affordable than pure PBT fiber and spandex; delivers 70-80% of spandex's elastic performance at far lower raw material price. No extra spandex covering or core-spun steps required; one-step spinning of PBT PET staple directly makes stretch yarn, simplifying production workflow.

6. Abrasion, Mildew & Light Resistant, Long Service Life

Inherits polyester's strong chemical stability, resistant to mildew, moth, chlorine bleach and UV light exposure. Garments woven from this fiber resist yellowing, brittleness and strength drop under long-term sunlight and repeated washing, ideal for outdoor sportswear, daily wear and long-use home textiles.

Application Scenarios

Elastic Knit Apparel: Stretch sweaters, faux wool pullovers, fitted leggings, long-sleeve base layers, dance tights
Footwear Textiles: High-stretch casual socks, sports running socks, compression hosiery, thick winter thermal socks
Active & Outdoor Wear: Fitness training suits, hiking stretch tops, cycling jerseys, ski outer layer lining
Home Textile Goods: Elastic bed sheet fabric, stretch cushion covers, plush blanket filling, upholstery sofa cloth
Fashion & Decor Fabric: Faux fur knit fabric, decorative stretch weaving yarn, gift craft textile raw material
Blended Functional Yarn: Mixed yarn with cotton/viscose for mid-range stretch casual wear and uniform fabrics

Frequently Asked Questions

Q1: How does PBT PET fiber create elasticity without spandex?

A1: Side-by-side dual polymers have different thermal shrinkage rates; heat setting triggers natural 3D latent crimp inside each fiber to deliver lasting stretch and rebound.

Q2: Is elastic recovery stable after repeated washing?

A2: Yes, crimp structure is inherent to the bicomponent fiber, resilience does not degrade after dozens of standard laundry cycles.

Q3: Can it be dyed under normal atmospheric pressure?

A3: Definitely, PBT component enables boiling dye with regular disperse dyes, no high-pressure equipment or carrier chemicals required.

Q4: What is the advantage vs pure PBT fiber?

A4: PET boosts dimensional stability, heat resistance and lowers raw material cost; composite balances soft stretch and structural toughness better than single PBT.

Q5: Does it work with regular ring spinning machines?

A5: 32mm standard cotton cut length fits all mainstream spinning lines, low breakage rate, no equipment modification needed.

Q6: Can blend with cotton, viscose or ordinary polyester?

A6: Excellent blending compatibility, adjust stretch, softness and production cost via custom mixing ratios freely.

Q7: Are samples available for crimp and spinning testing?

A7: Small test samples are supplied free of charge for lab performance verification and production line trials.

Q8: Can I adjust PBT proportion for higher/lower stretch?

A8: Custom PBT/PET blending ratios to tune elastic strength available for large volume bulk orders.

Tags:

Polyester Staple Fiber

Fire Retardant Polyester Staple Fiber

Low Melting Polyester Fiber

Hollow Conjugated Polyester Staple Fiber

Viscose Staple Fiber & Flame Retardant Viscose Polyester Fiber

Flame Retardant Acrylic Fiber

Polypropylene Staple Fiber

Colored/Dope Dyed Polyester Fiber

Microfiber

Ultra Short Fiber

Functional Staple Fibers

Conductive Polyester Fiber

Eco Friendly Biodegradable Fiber

Soybean Protein Fiber

Aloe Fiber

Alginate Fiber

Kapok Fiber

Bamboo Fiber

ES Fiber For Sanitary Products

Conductive Nylon Fiber

Loycell Fiber

Cooling Fiber

PTT Fiber

Concrete Fiber

Polylactic Acid Fiber

Acrylic Staple Fiber

Graphene Fiber

Polyester Staple Fiber

Fire Retardant Polyester Staple Fiber

Low Melting Polyester Fiber

Hollow Conjugated Polyester Staple Fiber

Viscose Staple Fiber & Flame Retardant Viscose Polyester Fiber

Flame Retardant Acrylic Fiber

Polypropylene Staple Fiber

Colored/Dope Dyed Polyester Fiber

Microfiber

Ultra Short Fiber

Functional Staple Fibers

Conductive Polyester Fiber

Eco Friendly Biodegradable Fiber

Soybean Protein Fiber

Aloe Fiber

Alginate Fiber

Kapok Fiber

Bamboo Fiber

ES Fiber For Sanitary Products

Conductive Nylon Fiber

Loycell Fiber

Cooling Fiber

PTT Fiber

Concrete Fiber

Polylactic Acid Fiber

Acrylic Staple Fiber

Graphene Fiber

products details

2.8D*32MM PBT PET Composite Staple Fiber, Latent Crimp High Elastic Fiber for Knitting Apparel Excellent Spinnability filling Fiber

2.8D*32MM PBT PET Composite Staple Fiber, Latent Crimp High Elastic Fiber for Knitting Apparel Excellent Spinnability filling Fiber