Glass fiber net factory

When evaluating glass fiber nets, you must prioritize weight per square meter (gsm), typically ranging from 45g to 160g, as this determines strength. Ensure the mesh size (e.g., 4x4mm or 5x5mm) aligns with your application. Crucially, for construction use, the mesh must be alkali-resistant, treated with a polymer latex coating to prevent degradation when embedded in cement or plaster.

A reputable factory should hold ISO 9001 for quality management. For the European market, look for ETAG 004 certification or CE marking, which are vital for External Thermal Insulation Composite Systems (ETICS). In the US, compliance with ASTM D578 for glass fiber strands is a key indicator of material integrity.

Request a tensile strength test report showing both initial strength and strength retention after alkali immersion (should be >50%). You can perform a simple field test by folding the mesh tightly; high-quality net will not snap or leave a permanent white crease, indicating a high resin content and proper coating flexibility.

Lightweight nets (45g-75g) are ideal for internal wall plastering to prevent micro-cracks. Medium-weight nets (110g-160g) are the industry standard for EIFS/ETICS (External Insulation Finishing Systems). Heavy-duty nets (above 300g) are used for stone reinforcement or specialized industrial filtration.

The most significant risk is alkali-resistance fraud, where suppliers use low-cost urine-glue instead of acrylic emulsion, leading to mesh dissolving inside walls after 6 months. Always use Made-in-China.com's Secured Trading services to hold payment until third-party inspection confirms the chemical composition.

Fiberglass pricing is highly sensitive to raw glass yarn and resin market rates. Negotiate based on total weight (tonnage) rather than just roll count. For customized widths or private labeling, expect a Minimum Order Quantity (MOQ) of 50,000 to 100,000 square meters. Ask for a tiered pricing structure where a 20GP container vs. a 40HQ container yields a 5-8% price difference.

Fiberglass rolls are susceptible to edge deformation. Ensure the factory uses thick cardboard tubes and wraps each roll in shrink-film. For sea freight, insist on vertical palletization with corner protectors to prevent the bottom rolls from being crushed, which renders them unusable for automated dispensing machines.

Be aware of anti-dumping duties (AD). Certain regions, like the EU and Turkey, have previously imposed high duties on Chinese fiberglass mesh. Always check your local Harmonized System (HS) Code (typically 7019) against current trade barriers. Sourcing through verified gold suppliers on Made-in-China.com can help you find factories with experience in navigating these specific customs documentations.