Shanghai Different Advanced Material Co., Ltd. is one of the leading manufacturers and suppliers of thermal fiber in China. With abundant experience, we are committed to providing high quality custom service for global clients. Welcome to wholesale premium thermal fiber made in China here from our factory.
Hollow Heat-Storage Fiber
Lightweight Insulation. Superior Loft. Lasting Resilience.
Our hollow PET staple fiber is engineered for thermal insulation and high-loft filling applications. Available in customizable 1-, 4-, and 7-channel structures, it offers flexible solutions for quilts, jackets, bedding and other thermal products. High-crimp and silicone-treated filling grades provide excellent loft and recovery to support long-lasting comfort and shape retention.
Product Overview
This hollow heat storage fiber is produced from PET raw materials with hollow spinnerets. Hollow cross-sections with 1, 4 or 7 channels can be customized as required. The product covers spinning grades and filling grades. Filling grades adopt high crimp and silicone treatment to deliver outstanding loft and resilience. Natural white is the standard color. Higher hollowness improves thermal insulation performance while slightly reducing fiber mechanical strength. Selection should be balanced according to end application requirements.
Technology Principle
1. Manufacturing this Hollow Heat Storage Fiber uses hollow spinnerets. PET melt is extruded, quenched into hollow filaments, then drawn, crimped, and cut, with a silicone finish added for filling grades. The channels close during the spinning path, sealing still air inside the fiber.2. Insulation works through the physics of air. Still air conducts at about 0.026 W/mK, far below the 0.14 of solid PET, so the trapped channels block the heat path along the fiber, and heat can only leak slowly by radiation and convection. Hollowness also lowers apparent density, so the same fiber weight builds a loftier wadding with thicker still-air gaps between fibers.3. Loft and recovery hold up over time. High crimp plus the silicone finish let filling batts rebound to 90% or better after repeated compression, so quilts and jackets keep their shape.
Core Advantages
1. Still-air heat retention. Static air trapped in the hollow cavities of this Hollow Heat Storage Fiber delivers thermal insulation and improves heat retention rate.
2. Lightweight and lofty. Low apparent density enables bulkier texture at the same weight, and the filling does not sag.
3. High resilience. Compression recovery rate ≥90%, resisting collapse after repeated use.
4. Complete specification range. Both spinning and filling grades are available.
Technical Specifications
|
Parameter |
Value |
|
Composition |
PET (hollow structure) |
|
Fiber type |
Staple (spinning / filling) |
|
Fineness (spinning) |
1.5D - 2.0D |
|
Fineness (filling) |
3D – 15D |
|
Cut length |
32 / 38 / 51 / 64 / 76mm |
|
Tenacity (spinning) |
≥3.8 cN/dtex |
|
Crimp |
High crimp, silicone-finished filling grades |
|
Color |
Natural white |
|
Packaging |
Standard bale ~250-300 kg |
Applications
Solutions for Every Industry
Note. Blended with radiation grades such as far-infrared or graphene fibers, the hollow heat storage fiber stacks structural insulation on radiative heat return for double warmth.
Quilts And Pillows
Down-like wadding for winter fills, light and lofty.
01
Garment Interlayers
Down-jacket liners, padded coats, and vest fills.
02
Warm Yarns
Hollow-spun fabrics plus socks and gloves.
03
Sleeping Bags And Outdoor Gear
Sleeping-bag fill and camping blankets.
04
Home And Toys
Cushion fills and plush toy stuffing.
05
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
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
Contact Us
For samples, thermal reports, or bulk pricing, contact the Different sales team. Share the end use, spinning, filling, or wadding, plus the loft and warmth targets, and technical advisors will match channel count, hollowness, and denier of the hollow heat storage fiber.
Tell us About Your Needs
Different is a trusted manufacturer and long-term partner for your business. Please contact us by filling out the form below, we'll get in touch with you shortly to discuss your specific needs.
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