50g/m² Non-Woven Glass Mat for Primary Backing and Dimensional Stability in Modular Carpet Tiles
2026-09-28 15:37
1. Technical Overview
SAXOBRAN SACT50 is a wet-laid non-woven fiberglass carpet tissue designed for continuous PVC, bitumen, and polyurethane carpet tile backing lines.
We manufacture this fiberglass tissue to lock modular floor tiles in place and stop edge doming or cupping under heavy foot traffic.
The 50g/m² matrix holds tight web tension during high-temperature PVC paste coating and hot bitumen impregnation up to 180°C.
Factory lines integrate SACT50 directly between secondary backing layers to stabilize modular tile geometry and eliminate field returns caused by dimensional shifting.
2. Technical Specifications Table (TDS)
| Technical Parameter | Metric Value | Test Standard | Workshop Function & Purpose |
| Unit Weight (Grammage) | 50 g/m² (±5%) | ISO 3374 | Controls exact fiberglass tissue mass to ensure balanced PVC or bitumen impregnation |
| Loss on Ignition (LOI) | ≤25% | ISO 1887 | Holds fiber network stability during hot PVC gelation ovens and molten bitumen baths |
| MD Tensile Strength | ≥ 150 N/50mm | ISO 3342 | Prevents web stretching and line snaps under high machine pull on continuous backing lines |
| CD Tensile Strength | ≥ 100 N/50mm | ISO 3342 | Stops edge tears and width shrinkage during continuous heat curing and die-cutting |
| Wet Tensile Retention MD | ≥ 60% | ISO 10542 | Retains tensile web strength when exposed to aqueous latex pre-coat or liquid adhesives |
| Moisture Content | ≤ 1.0% | ISO 3344 | Stops steam pinholes, voids, and poor layer adhesion during hot compound coating |
3. Key Features & Workshop Problem Solvers
Stops Carpet Tile Corner Curling and Edge Cupping
Modular carpet tiles expand and shrink under humidity changes and heavy rolling wheel loads. SACT50 fiberglass carpet tissue acts as an internal core stabilizer. The inorganic glass matrix locks thermal and moisture movement below 0.05%, keeping installed carpet tiles flat on commercial raised access floors.
High Pull Strength Across Hot PVC Gelation Ovens
Low-grade glass veils stretch or tear when moving through hot PVC gelation tunnels at 180°C. SACT50 fiberglass tissue maintains high longitudinal tensile strength (≥ 150 N/50mm). This high pull resistance prevents web breaks, stops line downtime, and maintains consistent tile squareness during high-speed cutting.
Superior Retention in Aqueous Pre-Coat Baths
Liquid latex and water-based pre-coat compounds can soften veil binders and cause web sag. SACT50 features a wet-tensile retention rate of ≥ 60%. The reinforced glass matrix keeps its structure intact when wet, ensuring smooth coating without web wrinkles or tearing.
4. Target Applications & Processing Lines
Modular PVC & Bitumen Carpet Tile Backing
Backing plant engineers feed SACT50 fiberglass carpet tissue into continuous coating lines between liquid PVC plastisol or hot-melt bitumen layers. The fiberglass tissue stabilizes the backing layer, locks dimensional tolerances, and prevents corner lifting on cut tiles.
Polyurethane (PU) Foam Cushion Backing
SACT50 functions as a reinforcement facing for carpet tiles with integral polyurethane foam cushion backings. The fiberglass carpet tissue allows PU foam chemicals to key into the veil surface without excessive bleed-through, creating a tough bond between face yarn pre-coat and cushion backing.
5. Frequently Asked Questions (Technical FAQ)
Q: How does SACT50 fiberglass carpet tissue prevent corner curling in finished carpet tiles?
A: SACT50 uses random wet-laid glass fibers bonded with thermosetting resin. Placed inside the PVC or bitumen backing layer, the fiberglass carpet tissue restricts thermal expansion and moisture movement, keeping individual tiles flat under traffic.
Q: Can SACT50 handle water-based latex pre-coating without losing web strength?
A: Yes. SACT50 fiberglass tissue is engineered with a water-resistant binder that maintains a Machine Direction wet tensile retention of ≥ 60%. It stays stable when passing through liquid latex dips or water-based pre-coat lines.
Q: Why is low moisture content (≤ 1.0%) essential for SACT50 on PVC backing lines?
A: High moisture in glass veils vaporizes into steam when contacting hot PVC plastisol or molten bitumen up to 180°C. Steam creates internal blisters and pinholes. SACT50 arrives sealed with ≤ 1.0% moisture content to ensure clean, bubble-free lamination.
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