Plywood is a composite of wood veneer, glue and water. Thin sheets of wood veneer are glued together to make plywood with flexible, inexpensive, workable and re-usable.
Softwood ply is used in construction such as walls, roofs and floors.
Hardwood ply is used in furniture such as floors, kitchen units and some furniture.
Plywood is divided into 3 main kinds
Packing plywood
Furniture plywood
Construction plywood
The production process of plywood:
A log is softened with steam and then mounted on a lathe
A thin layer of wood is peeled off in a continuous veneer sheet.
Several layers of veneer are glued together alternating between the different layers.
The stack is heated and pressed to form a rigid panel.
Glue:
According to the usage purpose, the plywood is used indoors or outdoors that manufacturers use MR or WBP glue.
Plywood for indoor uses the less expensive urea-formaldehydeMR glue, which has limited water resistance
Outdoor and marine-grade plywood are designed to withstand rot, and use a water resistant phenol-formaldehyde glue to prevent delamination and to retain strength in high moisture.
Grade:
A
Face and back free from all defects.
A/B
Face veneers free from all defects. Reverse veneers with only a few small knots or discolorations.
B
Both side veneers with only a few small knots, not smooth.
BB
Both sides permitting jointed veneers, large knots, plugs, etc.
BB/CC
Little knots, no decay, wormholes or tear mended skillfully.
GradeA
gradeB
Best Regards
Mr.Tung
THUY LINH PLYWOOD PRODUCTION AND EXPORT CO., LTD
No. 12 Lane 2, Doi Nhan Street, Vinh Phuc Ward, Ba Dinh District, Hanoi City, Vietnam
Tel: +84 4 6682 7331
Mobile: +84 1664 528 331
Skype: Takayamajin1