The most important quality of film faced shuttering is the core type. It decides basically how many times the marine plywood can be used in the concrete formwork. The worldwide plywood industry use hardwood birch or softwood pine to make the base of phenolic ply board.
Due to the climate difference, Chinese plywood manufacturers use hardwood or poplar to produce the shuttering panel.
This article will make some short explanations on the industry standards now in China.
1. Finger Joint Core
Finger joint core is recycled formwork plywood laminated with a few layers of new poplar veneers. Its surface is rough. But have the best prices. Finger joint core marine plywood can only be used 2 times. 1 time for each face.
2. Poplar Core
Poplar is the most widely spread plantation in mainland China. It is the main material to produce plywood, chipboard, OSB board in China. The film faced plywood in China usually comes in 12mm, 15mm and 18mm. The density of poplar core is normally 530 kgs/m3 around. Poplar ply with high pressure can reach at most 550 kgs/m3.
3. COMBI Core
It is an innovation by plywood manufacturers. It combines with the advantages of hardwood and poplar. A good choice for those requires good quality and reasonable prices. COMBI plywood core veneers are poplar and hardwood mixed layer by layer.
4. Hardwood Core
Hardwood is a general range for wood material. It can be birch, eucalyptus, general hardwood etc. It has better strength than poplar and you need to pay a higher price to buy this type of phenolic faced panel. The density is 600-700 kgs depending on the wood species. Chinese hardwood is normally eucalyptus plywood.
|Core Types||Reuse Times in Formwork||Price Level|
|Finger Joint Core||2||A|