Alkali Free Fiberglass Yarn

TDS of Fiberglass Yarn：

TDS D450 1-0.pdf

Video of Fiberglass Yarn:

E-Glass Fiberglass Yarn for Weaving and Electrical Insulation:

E-glass fiberglass yarn is produced from continuous glass filaments with a controlled filament diameter. A defined number of filaments are gathered, treated with an appropriate sizing system and twisted to form a stable yarn.

The sizing protects the glass filaments during winding, weaving, braiding and other textile processes. Different sizing systems can also be selected according to the required processing performance and compatibility with the final application.

JLON supplies E-glass twisted fiberglass yarn in single and multi-ply constructions. Different tex, filament diameters, Z- or S-twist directions, twist levels and bobbin sizes are available.

The yarn is suitable for manufacturing fiberglass fabrics, electrical insulation textiles, braided sleeves, insulation tapes, coated fabrics and other industrial glass-fiber products.

Key Benefits of JLON Fiberglass Yarn:

• Consistent filament diameter for stable weaving performance

• Excellent compatibility with epoxy, polyester, and vinyl ester resins

• Low fuzz and high tensile strength for high-speed processing

• Uniform sizing ensures good bonding with matrix materials

• Available in multiple tex and twist options for different applications

Packages of Fiberglass Yarn:

Our normal packing is 24 bobbins/ctn,ctn size:49*33*29.5CM,640ctns/20GP without pallets.About 13t/20GP.

Product Types

Twisted Fiberglass Yarn

JLON supplies twisted fiberglass yarn in both single and multi-ply constructions. Different tex, Z- or S-twist directions, twist levels and sizing systems are available for weaving, braiding, insulation tapes and other industrial textile applications.

Single Twisted Fiberglass Yarn

Single twisted fiberglass yarn consists of continuous glass filaments gathered, sized and twisted into one yarn.

It is commonly selected for weaving fine fiberglass fabrics, electrical insulation textiles, tapes and braided products. The appropriate filament diameter, tex, twist and sizing should be selected according to the production equipment and final application.

Multi-Ply Twisted Fiberglass Yarn

Multi-ply twisted fiberglass yarn is produced by combining two or more single yarns.

It provides higher linear density and improved yarn integrity and stability for industrial weaving, fiberglass tapes, braided sleeves and other textile applications.

Available constructions include 1/2, 1/3, 1/4, 1/5 and 1/6, subject to specification and production availability.

Specification of  Fiberglass Yarn:

How to Read Fiberglass Yarn Specifications:

• Example: EC9 68 Z28

• • E: E-glass composition
  • C: Continuous filament
  • 9: Nominal filament diameter in micrometres
  • 68: Nominal linear density in tex
  • Z: Twist direction
  • 28: Approximately 28 twists per metre

• Example: EC9 136×1×2S112

• • EC9: E-glass continuous filament with a nominal filament diameter of 9 μm
  • 136: Linear density of the single yarn
  • 1×2: Two single yarns combined into one plied yarn
  • S: Final twist direction
  • 112: Twist level expressed according to the applicable designation system

Application of Fiberglass Yarn:

• Fiberglass Fabric Weaving

• E-glass twisted fiberglass yarn is used as warp or weft yarn in the production of lightweight and medium-weight fiberglass fabrics.

• Stable yarn tension, low fuzz and consistent twist help improve weaving efficiency and fabric appearance.

• Electrical Insulation Textiles

• Fine twisted fiberglass yarn can be woven or braided into electrical insulation fabrics, tapes and sleeves.

• The exact yarn specification and sizing should be selected according to the insulation system and downstream treatment process.

• Braided Sleeves and Tubing

• Fiberglass yarn can be braided into sleeves and tubes for thermal protection and electrical insulation.

• Yarn tex, twist, ply structure and sizing should match the braiding equipment and required sleeve construction.

• Fiberglass Tapes

• Single or multi-ply twisted fiberglass yarn can be used to manufacture woven and braided fiberglass tapes for insulation, wrapping and industrial reinforcement.

• Coated and Laminated Fabrics

• Fiberglass yarn can be woven into base fabrics for subsequent coating or lamination. The sizing and fabric treatment must be selected according to the coating system and end-use requirements.

• Composite Reinforcement Fabrics

• Selected fiberglass yarn specifications can be used to produce woven reinforcement fabrics for pipes, tanks, marine components and other composite products.

• Compatibility with the intended resin system should be confirmed according to the sizing used on the yarn.

How to Choose the Right Fiberglass Yarn

1.Filament Diameter

Finer filaments are generally selected for lightweight fabrics and applications requiring better flexibility. Larger filament diameters may be suitable for heavier industrial textiles.

2.Linear Density

Tex indicates the weight in grams per 1,000 metres of yarn. A higher tex means a heavier yarn. The required tex depends on the fabric weight, construction and processing requirements.

3.Single or Multi-Ply Construction

Single twisted fiberglass yarn is commonly used for fine fabrics and insulation textiles.

Multi-ply twisted fiberglass yarn provides higher linear density and improved yarn stability for heavier industrial textiles, tapes and braided products.

4.Twist Direction and Twist Level

Z-twist and S-twist must match the fabric design and processing equipment. Twist level affects yarn integrity, flexibility, weaving behaviour and surface appearance.

5.Sizing System

Sizing protects the glass filaments during processing. It should be selected according to the weaving or braiding process and, where applicable, the resin, coating or impregnation system.

6.Package Format

Bobbins are suitable for many standard weaving and braiding operations. Beams may be supplied for customers requiring prepared warp systems.

Why Choose JLON Composite?

• Multiple E-glass twisted fiberglass yarn specifications from qualified manufacturing partners
• Specification matching based on the customer’s application
• Quality documentation and batch traceability
• Pre-shipment specification confirmation
• Flexible packing and supply arrangements
• Support for customized yarn and sizing requirements
• Export experience serving international composite and industrial-material customers

JLON is a composite-material supplier working with qualified manufacturing partners. We help customers select suitable fiberglass yarn specifications, coordinate production, verify quality requirements and manage export delivery.

FAQ of Fiberglass Yarn:

1. What is twisted fiberglass yarn?

Twisted fiberglass yarn consists of continuous glass filaments that are gathered, sized and twisted to form a stable yarn. Twisting improves yarn integrity and makes it suitable for weaving, braiding and other textile processes.

2. Is alkali-free fiberglass yarn the same as E-glass yarn?

Alkali-free fiberglass yarn generally refers to E-glass continuous filament yarn with a low alkali content. The exact glass composition and applicable standard should be confirmed in the product specification.

3. What is the difference between fiberglass yarn and fiberglass roving?

Fiberglass yarn generally has a smaller linear density and controlled twist, making it suitable for weaving, braiding and insulation textiles.

Fiberglass roving consists of larger bundles of continuous strands and is commonly used for heavier reinforcement fabrics, pultrusion, filament winding and other composite processes.

4. What is the difference between single and multi-ply twisted fiberglass yarn?

Single twisted yarn consists of one gathered and twisted yarn structure. Multi-ply yarn is produced by combining two or more single yarns, providing higher linear density and improved processing stability.

5. Can you supply both single and multi-ply fiberglass yarn?

Yes. JLON supplies single and multi-ply E-glass fiberglass yarn in different filament diameters, tex, twist levels, sizing systems and package formats.

6. How do I select the correct tex?

The required tex depends on the target fabric weight, fabric construction, weaving or braiding equipment and end-use performance. Please provide an existing specification or product sample where possible.

7. Can the sizing be selected for different resin systems?

Different sizing systems are available for different processing and end-use requirements.

Please advise whether the yarn will be used for weaving, braiding, coating or composite reinforcement and identify the intended resin or coating system.

8. Can you provide fiberglass yarn on beams?

Yes. Fiberglass yarn can be supplied on bobbins or beams, subject to the specification, required beam construction and order quantity.

9. Can you provide samples?

Samples can normally be arranged after the yarn specification, sizing and application have been confirmed. Sample availability and preparation time depend on the requested product.

10. What is the typical lead time?

Typical lead time is approximately two to three weeks after order confirmation. The final delivery schedule depends on the specification, quantity and production schedule.