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For manufacturers crafting large, complex composite parts—from boat hulls to industrial tanks—speed, consistency, and strength are non-negotiable. At Hebei Yuniu Technology Co., Ltd., we’ve spent 20 years refining the solution that checks all three boxes: fiberglass spray up roving. Trusted by 3,162 customers across 128 countries (including a top U.S. company we’ve partnered with for over a decade), our spray up roving transforms the spray-up molding process—cutting production time, reducing waste, and delivering composites that stand the test of time. Whether you’re a manufacturer scaling production, a trader sourcing reliable materials, or an engineering firm demanding precision, our spray up fiberglass roving is the reinforcement that elevates your end products.
The spray-up process (also called chopper gun molding) relies on one critical material: fiberglass spray up roving. Unlike traditional woven fabrics or chopped mats, this roving is a continuous strand of high-strength glass fibers, engineered to be fed through a chopper gun, cut into short lengths (typically 12–50mm), and sprayed directly onto a mold—along with resin— to form a composite layer.
Nothing slows production like roving that tangles, breaks, or clogs the chopper gun. Our spray up roving is wound onto precision spools with consistent tension, ensuring it feeds evenly through any standard chopper gun (from 1.5mm to 3mm orifices). It also has a low-fuzz surface—reducing fiber loss and waste to less than 2% (compared to 5–8% with generic roving). For manufacturers, that translates to lower material costs and fewer production halts.
Whether you use polyester, epoxy, or vinyl ester resin, our glass fiber spray up roving bonds seamlessly. It’s treated with a proprietary sizing agent that enhances resin wet-out—meaning fibers absorb resin quickly, eliminating air bubbles and ensuring full reinforcement. This compatibility makes it ideal for cross-industry use: from aerospace (lightweight interior panels) to construction (composite pipes, architectural cladding).
In response to the special needs of pipes, Niumaterial has developed high modulus and low elongation yarn products to ensure that the pipes maintain stable performance under long-term loads. Its yarn uses an advanced sizing agent formula, which is closely combined with the resin matrix to improve the interface strength of the composite material.
Composites made with our fiberglass spray up roving don’t just look good—they last. The E-glass fibers resist UV degradation (no fading or brittleness in sunlight), moisture absorption (prevents mold or rot), and chemical corrosion (stands up to acids, alkalis, and solvents). For outdoor or industrial applications, this means fewer repairs, longer part lifespans, and happier end customers.
No two production lines are the same. We offer spray up fiberglass roving in customizable strand counts (1200tex to 9600tex), spool weights (10kg to 50kg), and sizing agents (for specific resin types). Need a roving optimized for high-speed chopper guns? Or a flame-retardant variant for fire-rated parts? Our R&D team works with you to tailor the product—just like we did for our U.S. partner, who saw a 20% boost in production efficiency after switching to our custom roving.
We know production stops cost money. With our integrated manufacturing, sales, and logistics team (and strategic facilities to serve global markets), we ensure 98% of orders ship within 72 hours. Whether you’re in Europe, Southeast Asia, or the Americas, your glass fiber spray up roving arrives on schedule—so your line keeps running, and deadlines stay met.
Our commitment to you continues after you receive your order. If you have questions about setup (e.g., chopper gun speed, resin mixing ratios), our technical team is available 24/7 to help. For traders, we offer competitive bulk pricing and flexible payment terms to support your business growth. And if issues arise? We work with you to resolve them fast—no runaround, just solutions.
If you have any questions
Please contact us for free consultation and product quotation
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