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hollow polyester filament

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Introduction

Hollow polyester filament is spun through a special spinneret so that each filament has a hollow center. Air trapped in that core lowers the weight of the yarn and improves insulation, because still air conducts heat far less than polyester.

In fabric, the effect is lightness, loft and warmth without extra weight. The yarn feels soft and full, and a fabric made from it often covers well at a lower gsm. The hollow ratio, the share of the cross-section that is empty, can be set to balance warmth against strength and crush resistance.

We develop this yarn to order. Typical customers are knitwear, bedding and outdoor brands, and mills making warm or lightweight fabrics. Spinneret design, hollow ratio, denier and filament count are agreed with you during development, with R&D support and inspection after each process.

Related products

Services

We insist on timely and fast service, the implementation of all-weather tracking service, adequate spare parts inventory, so that our customers have no worries.

  • Wide Variety

    Wide Variety

    Design & Manufacturing. In stock or customizable.

  • Sample and Catalog

    Sample & Catalog

    OEM/ODM available.

  • Production and Delivery

    Production & Delivery

    Flexible production and delivery policies

  • Business Experience

    Business

    Over 19 years of experience in eco-friendly textile products

Specification

ItemDetails
ProductHollow polyester filament yarn
Cross-sectionRound hollow; other hollow shapes by development
Hollow ratioSet per project, commonly in the range of about 10 to 30 percent
Yarn typesFDY or DTY, by order
Common counts75D/36F, 100D/48F, 150D/48F, 150D/96F; other counts by order
LusterSemi-dull or full-dull; bright on request
ColorRaw white or dope dyed; custom shades agreed before production
Test dataDenier, tenacity, elongation and shrinkage per lot on request
PackagePaper tube; cartons on pallets
Origin and portHaian, Nantong, Jiangsu, China; Shanghai seaport
CustomizationHollow ratio, denier, filament count, luster, color

Application

Hollow filament is chosen when warmth, loft or low weight is the selling point. Typical uses are:

  • Warm knitwear and underwear: lighter winter layers with good insulation.

  • Bedding and blankets: soft, warm throws, quilts covers and pillow fabrics.

  • Winter sportswear and outdoor linings: warm, lightweight jacket and glove linings.

  • Fleece-style and velour fabrics: bulky, soft surfaces at lower weight.

  • Sofa and home fabrics: warm-feeling, lightweight upholstery.

  • Blended yarns: combined with solid polyester or nylon for a tuned balance of warmth and strength.

For cool-touch summer products, a solid or HDPE filament is the better choice, so the end use should decide.

Advantages

  • Lower weight: the hollow core cuts density, so fabrics feel lighter.

  • Better insulation: trapped air reduces heat transfer for a warmer hand.

  • Bulk and softness: loft and cover at a lower yarn weight.

  • Adjustable design: hollow ratio and count tuned to the fabric.

  • Development support: R&D team and sample trials before bulk orders.

Hollow versus solid polyester filament

PropertyHollow filamentSolid filament
WeightLighterHeavier
InsulationHigherStandard
Bulk and loftHigherStandard
Crush resistanceLower; depends on hollow ratioHigher
Best forWarm and lightweight fabricsGeneral fabrics, strength-led uses

A higher hollow ratio brings more insulation but lower crush resistance, so we tune it to the product.

Payment and Shipping

Payment terms

  • T/T (bank transfer) is our standard method; L/C at sight is accepted for qualified orders.

  • Deposit and balance terms are written into the quotation, so there are no surprises at shipment.

  • Sample orders can be settled by bank transfer or other methods we agree on with you.

Shipping and lead time

  • Goods ship from our factory base in Haian, Nantong, Jiangsu, with Shanghai seaport as the usual port of loading.

  • Sea freight for production quantities, express (DHL, FedEx, UPS) or air freight for samples and urgent lots.

  • Trade terms such as EXW, FOB Shanghai and CIF can be quoted according to your forwarder setup.

  • Hollow filament is developed and produced by order. Lead time depends on spinneret design, count and quantity, and is stated in the quotation.

  • Export packing is done in cartons on pallets, with labels showing denier, lot number and net weight.

We export to the United States, Germany, Japan, Spain, Italy, the United Kingdom, South Korea, Australia, Canada and many other countries. Inquiries are answered within 12 working hours.

  • Q: What is hollow polyester filament?

  • A: It is polyester filament with an air-filled hollow center in each filament, which lowers weight and improves insulation.

  • Q: Why is hollow filament warmer?

  • A: The trapped air in the core conducts heat poorly, so the fabric holds warmth better at the same or lower weight.

  • Q: What hollow ratio should I choose?

  • A: It depends on the fabric. A higher ratio gives more lightness and warmth but less crush resistance. We suggest a ratio after you share your product.

  • Q: Is hollow filament as strong as solid?

  • A: Tenacity is usually somewhat lower per denier, because there is less polymer. We share lot data and advise on counts.

  • Q: Can hollow polyester be dyed?

  • A: Yes, with disperse dyes like standard polyester, though the hollow structure can make shades look lighter. Dope-dyed yarn is another option.

  • Q: Is it available as FDY and DTY?

  • A: Both can be developed to order. FDY gives smooth, light fabrics and DTY gives bulky, warm knits.

  • Q: Can you develop a custom hollow yarn?

  • A: Yes. Send your target weight, warmth and count, and our team replies within 12 working hours.

About
GC FIBER
GC FIBER has been a special textile factory in China since 2006 years. We are devoted to researching, developing, producing, and selling special and functional eco-friendly textile products.
Our products include Biodegradable Yarn, Low Melting Yarn, ECDP Yarn, Anti Static Yarn, HDPE Yarn, Bio-component Yarn, and Polyester Filament Yarn.
We are always interested in cooperating with our guests to develop new material.

WHY WE ARE SO TRUSTED

We have got a high reputation in both domestic and overseas markets.

Professional

We will communicate with customers professionally, listen to their opinions and give useful suggestions, and spend time and energy to solve every problem, no matter all the problems you encounter.

Quality

We have strict quality control requirements and the advanced testing equipment in the industry. Every process has professionals to conduct inspections to ensure product quality.

Cost

We have a number of production lines, a number of production machines, comprehensively improve product quality and production efficiency.

Design and R&D

We devote to research, development, production and sales of special and functional eco-friendly textile product.

Diversity

Our product includes PBS biodegradable product, recycled easy dyeing cationic yarn, PLA yarn, Low melting yarn, Anti-Static yarn ,PBS fiber, PLA fiber, FR nylon fiber etc.

Capacity

The company has sufficient production capacity and high control over raw material prices, quality and stable supply, which can meet the needs of customers with different procurement volumes.

Service

We insist on timely and fast service, the implementation of all-weather tracking service, adequate spare parts inventory, so that our customers have no worries.

Shipment

We are near Ningbo Port and Shanghai Port, and are very convenient and quick to transport cargo to other national capitals.

Diversified Professional Team

GC FIBER has unique sales, research and development, design, production departments and expertise to provide customers and stakeholders in various industries with specialty, functional and environmentally friendly textiles.

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