under high temperature and pressure, inject the PPR into wood material base board such as HDF, to unite with the floor together to form a perfect locking floor .
Advantages of frame floor:
1. Separate the core board and air, water resistant and moister resistant . Shrinkage, expand, out of shape are not problems here .
2. Frame surrounding the core, formaldehyde emission is almost zero .
3. In warm areas, frame floor will not go moldy like normal floors.
4. Frame protect the core board from colliding, more durable .
5. No squeaking .
Frame material: PPR = polypropylene random.
1. main component are H and C, poisonless .
2. heat and pressure resistance, under 20 centi degrees can use over 100 years .
3. heat preservation, only 1/200 of steel .
4. not expand, moister resistant, density is about 0.9g/cm3; very steady .