SACM450-M MARINE & TRANSPORTATION TISSUE (450g/m²)
Raw mat takes too long to soak resin and warps under heat during paint curing. SACM450-M uses a dense 450g/m² matrix to mask heavy structural glass, speed resin wet-out, and deliver smooth auto body panels with lower scrap rates.
SACM450-M MARINE & TRANSPORTATION TISSUE (450g/m²)
Fast Wet-Out. Zero Surface Read-Through.
SAXOBRAN® Our team designed SACM450-M because we saw auto body plants scrap composite hood panels when heavy glass fibers show print-through on glossy gelcoats. We found that raw mat takes too long to soak resin, leaves trapped air pockets, and warps under heat during paint curing. SACM450-M uses a dense 450g/m² matrix to mask heavy structural glass, speed resin wet-out, and deliver smooth auto body panels with lower scrap rates.
Industrial Pain Points Solved
Fiber Read-Through on Glossy Auto Panels
Heavy glass fibers telegraph through thin gelcoats during post-bake curing. Surface waves force worker teams to do costly hand sanding before paint application.
Built with a dense 450g/m² surface barrier layer that completely hides underlying heavy roving.Delivers a Class-A surface finish that cuts panel hand-sanding time by up to 40%.
Slow Resin Wet-Out and Trapped Air Blisters
Heavy mats trap air during resin injection in RTM molds. Dry spots create internal voids that snap under vehicle flex stress on the road.
Engineered with a fast-dissolving silane binder formulation for rapid resin flow (≤30s wet-out).Allows polyester and vinyl ester resins to flood the mold evenly, driving out air pockets.
Engineered Characteristics
Surface Masking & Class-A Finish
Blocks coarse glass fiber telegraphing so auto body parts stay smooth and paint-ready after oven baking.
Fast Resin Wet-Out
Soaks up polyester, vinyl ester, and epoxy resins in under 30 seconds without washing fibers under resin pressure.
Mold Layup Flex & Hold
Conforms tight around sharp body contours and truck cab corners without spring-back or corner tearing.
Technical Specifications Table
| Technical Parameter | Standard Value | Testing Basis | Engineering Purpose |
| Unit Weight (Grammage) | 450 g/m² (±5%) | ISO 3374 | Secures heavy surface coverage to block fiber read-through on body parts |
| LOI(Loss on Ignition) | ≤5.5% | ISO 1887 | Controls binder balance for fast resin wet-out and high mold conformity |
| MD Tensile Strength | ≥500 N/50mm | ISO 3342 | Prevents mat tearing when pulled into deep-draw auto body molds |
| Wet-out Speed | ≤55 s | ISO 3374 (modified) | Ensures fast resin flow in RTM and hand lay-up to stop dry spot formation |
Processing, Packaging & Logistics Quality
1
Temperature Range
Store rolls in dry indoor rooms kept between 10°C and 30°C.
2
Humidity Limits
Keep relative humidity below 65% so silane binders stay fresh.
3
Stacking Security
Do not stack pallets more than 2 layers high to keep cardboard cores round.
Global Supply Chain Securement
Roll & Core Construction: Wound tight on heavy-duty 3-inch solid paper cores to prevent core collapse under weight.
Sealed Barrier Packaging: Sealed in thick PE shrink film to block moisture, dust, and sea air during transit.
Anti-Shifting Loading: Fixed on sturdy wooden pallets with protective corner boards and tight plastic strapping.
Technical Q&A
Q: What is the fundamental difference in design logic between this model and the standard or general-purpose models within this category?
A: Standard surface veils (like 30g/m² or 50g/m²) are built only for light print-through protection. SACM450-M is a heavy-duty 450g/m² structural surface tissue engineered specifically for automotive body panels. It combines high surface masking with fast resin wet-out (≤30s), allowing it to replace multi-layer thin veils in RTM and press molding lines.
Q: In actual operation, how can this model be utilized to achieve optimal performance?
A: Lay SACM450-M directly behind your gelcoat layer before adding structural roving mats. Spray or inject resin at steady pressure to avoid washing the surface fibers. Keep mold temperatures between 40°C and 60°C during initial resin fill so the binder dissolves cleanly and releases trapped air before curing.
Q: What are the shelf life and storage limitations after opening the original packaging?
A: Once you open the PE film seal, use the roll within 48 hours. Heavy glass mat absorbs workshop moisture fast in humid plants. If mat moisture rises, resin wet-out slows down, leading to dry spots and surface pinholes on finished body panels. Wrap open rolls back in plastic wrap.