Introduction To Microcellular Foam Board

Microcellular Polypropylene foam, referred to as MPP, refers to polypropylene porous foam material with a cell size of less than 100 microns (more strictly defined as a cell size of less than 10 microns and a cell density greater than 10 to the 9th power/cm3). Due to the existence of a large number of micron-sized cells inside the material, MPP has excellent shock absorption, cushioning, heat insulation and sound absorption properties, and can be widely used in packaging, vehicles, bags, sports equipment and other fields. It is the traditional EVA, PU, The best substitute for PS foam material, EPE and EPP.

Performance and Application

Supercritical carbon dioxide technology (supercritical carbon dioxide) is used to prepare MPP. Carbon dioxide gas is introduced into the polypropylene material matrix under high temperature and high pressure, and its nucleation and foaming are induced to form a microcellular foam material containing a large number of micron-scale cells. The foaming process is clean and pollution-free, and the foamed products are hygienic and environmentally friendly. The PP material is not cross-linked during the foaming process, so it can be recycled and reused.

Polypropylene (PP) itself is a non-toxic material, and it is a commonly used material for baby feeding bottles and microwaveable lunch boxes. The clean and hygienic MPP is especially suitable for the fields requiring high hygienic level of packaging materials such as medical equipment and food. It can also be used in children's puzzles, toys and other fields with high product health requirements, replacing the commonly used cross-linked PE foam and EVA foam made of AC foaming agent.

PP is a semi-crystalline polymer, and its melting point is generally 150~170°C. Compared with PE, PS, and PU foam materials whose temperature resistance is only 70~80°C, MPP can be used at a temperature up to 120°C, so MPP is especially suitable for high-temperature packaging, high-temperature insulation and other fields.

MPP integrates reinforcement, heat insulation and noise reduction, and is especially suitable for fields with high requirements for lightweight materials, such as automobiles, rail transit, ships, and fan blades.

Lightweight and high-strength MPP thick boards are used as structural foams to replace traditional structural foams such as PVC/PU interpenetrating structural foams, PET structural foams, etc., especially as core materials for sandwich composite materials.

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