*Appearance of the product:
1,Appearance of packing: pie form, middle rolled as a round; 200m/piece; diameter 0.8 - 1.3m; thickness 0.1m.
2,Section: harmonica form, cross-core structure.
1,1. The core boards are made of mixture from PP and PE, so it combines the rigidity of PP and the flexible and weather-resistant capabilities of PE.
2,filtration membrane is made of non-woven fabrics, permeability and water logging ability enjoying good
3,filtration membrane are firm together when wrapping the core board by ultrasound