GORE® RASTEX® Weaving Fiber for Filtration Applications
Our High Temperature and Industrial Weaving Yarn has exceptional strength, maintaining its dimensional stability better than other synthetic and PTFE fibers.
Exceptional Strength: Dimensional Stability
GORE® RASTEX® Weaving Yarn is made from a unique form of expanded PTFE. It has exceptional strength, maintains its dimensional stability better than other synthetic and PTFE fibers, is resistant to elevated temperatures and is chemically inert. Products woven with GORE RASTEX Fibers are well-suited to filtration of aggressive materials and high temperature fluids or gases.
Proven Performance for High Temperatures and Aggressive Materials
Key Features
- 30 years of proven performance
- Low shrinkage at elevated temperatures
- High tenacity at room and elevated temperatures
- Low elongation at elevated temperatures
- Non-contaminating
- Made from 100% expanded PTFE
- Non-aging
- Generally chemically inert
Key Benefits
- GORE RASTEX Fibers Weaving Yarn offers up to 20% material savings due to higher yield/kg compared to competitive yarn
- Higher tenacity provides more construction options that use less yarn
- Reduced breakage leads to fewer weaving interruptions
- Lower elongation means less damage from heavy dust load in filter bags
- Does not degrade in chemicals, high temperatures or moist environments
- Longer life for filter bags, cartridges, fabrics and scrims
GORE RASTEX Fibers Weaving Yarn is used in numerous applications, including:
- Support scrims for felts
- Fine filtration media for gas or liquid filtration
- Fabric for thermal insulation
Technical Information
What happens to supporting scrims during felt manufacturing?
Needle-felting processes can abrade and weaken supporting scrim fibers, and yet it is the supporting scrim that contributes most to the felt's strength. The unique structure of GORE RASTEX Fibers Weaving Yarn makes it stronger and able to retain more strength after felting than other PTFE fibers. The result is stronger felts. Manufacturers can even use a looser scrim weave or smaller fiber to attain the same strength compared to other PTFE fibers, especially when GORE RASTEX Fibers Weaving Yarn is used.
Why is shrinkage important?
Manufacturers must compensate for weaving yarns that will shrink excessively during processing or in the eventual application. This process is time consuming and unpredictable, resulting in products that do not meet specifications. GORE RASTEX Fibers Weaving Yarn shrinks less at high temperatures, so filter media are more dimensionally stable, providing higher processing yields and more consistent felts and fabrics. End users will appreciate the dimensional stability because their bags and cartridges will last longer.
Why is performance at operating temperature so important?
Not all PTFE yarns perform the same as the temperature rises. Shrinkage, elongation and tenacity change as the operating temperature increases. These factors are critical for performance of filter bags and cartridges. The high tenacity available in GORE RASTEX Fibers Weaving Yarn means scrims will be stronger at operating temperatures compared to other PTFE yarns. At elevated temperatures, Gore's higher tenacity yarns also maintain more of their strength to resist the mechanical damage from high elongation forces more than other PTFE yarns. GORE RASTEX Fibers Weaving Yarns shrink less at high temperatures, so filter media are more dimensionally stable, providing higher processing yields and more consistent felts and fabrics.
Can I use GORE RASTEX Fibers Weaving Yarn for precision woven fabrics?
GORE RASTEX Fibers Weaving Yarn is available in fine, precise, round cross-section fibers that are ideal for weaving into very fine filtration media and for liquid filtration processing. Contact us for more information.
Where can I buy fabrics and scrims made with GORE RASTEX Fibers Weaving Yarn?
Ask your weaver or contact us for a list of suggested weavers.
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FOR INDUSTRIAL USE ONLY
Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.
PTFE is most appropriate for high temperature and or filtration processes with aggressive chemical, acids, strong base solutions. PTFE woven fabric also provides great thermal insulation production in various industrial settings.
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