Plywood QC Inspection Checklist : Part 4 Number of Plies (Layers )

Plywood QC Inspection Checklist : Part 4 Number of Plies (Layers )

The quantity of the plywood plies normally affect the final quality of the plywood ,especially the Odd and even construction .As traditional manufacturing production ,plywood always have Odd plies ,for example ,18mm plywood has 11 plies or 9 plies ,5 plies or 13 plies ,not 10 or 12 plies …

In China ,some manufacturers in order to save manufacturing costs ,they Invented one way to make even number plies ,such as 10 plies ,8 plies ,or 12 plies to make plywood .

The difference of Odd and Even numbers ,only affect the warpping problems (also called balance ) .There is usually an odd number of plies, so that the sheet is balanced—this reduces warping. Becauseplywood is bonded with grains running against one another and with an odd number of composite parts, it has high stiffness perpendicular to the grain direction of the surface ply.

In China ,traditional production ,the inner core plies

18mm 11 plies ,13 plies ,9 plies

15mm ,9 plies ,11 plies

12mm ,7 plies

5.2mm 3 plies

2.7mm 3 plies and 4 plies

 

如无特殊说明,文章均为本站原创,转载请注明出处。If there are no special instructions, the articles are original, if you want to use or reproduce, please indicate the original source www.plywoodinspection.com,If you find that our articles infringe on your copyrights and interests, please email us at info@plywoodinspection.com in time and we will delete it at the first time.

Check Also

plywood complies with the following CE certification requirements

CE2+ CERTIFICATION plywood complies with the following CE certification requirements: i)       EN 636-3 S (Structural …

Leave a Reply

Your email address will not be published. Required fields are marked *