PP Sandwich Mat

PP Sandwich Mat Technical Data Sheet

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M3 is a combination of chopped strand mat stitched on both sides of a layer of polypropylene core. It’s compatible with UP, vinyl ester, epoxy and phenolic resin. This product is recommended for the production of composites in hand lay-up, RTM and other closed molding processes. It’s widely used in boat building and automobile industries. And its end products include FRP boats, automobile hulls, panels, refrigerators and profile material.

M3-M PP Sandwich Mats are designed to be compatible in UP, vinyl ester, epoxy and phenolic resin systems. Chopped fiber is laid up tightly, which helps lower resin usage and increase flow speed. Stitch-bonding a binderless mat allows the fabric to be made more simply and efficiently, thus increasing the job efficiency and lower the cost. To help ensure the quality of customers’ products, the quality management programs of manufacturing M3-M PP sandwich mats are controlled under the requirements of ISO 9001.


M3-M PP Sandwich Mat is wound into a roll on a cardboard inner tube with an inside diameter of 7.3cm (2.8"). All densities are 55cm (21.5”) in diameter. Each roll is wrapped with a plastic bag. For the bottom layer of a container, four (4) rolls are placed vertically on a pallet, which is stretch wrapped. For the top layers, three (3) rolls are placed horizontally on a pallet, which is also stretch wrapped.


Unless otherwise specified, it is recommended to store glass fiber products in a cool, dry area. Temperature should not exceed 35ºC (95ºF) and the relative humidity should be kept below 75%. Fiberglass products must remain in packaging material until just prior to its use. If these conditions are respected, the glass fiber product should not undergo significant changes when stored for extended periods of time.


To ensure safety and avoid damage to the product, skids should not be stacked more than two high. When stacking two pallets high, care should be taken to correctly and smoothly place the top pallet.