Manufacturing Defects of film faced plywood ,Quality checking
When your QC found these defects,what they did in the past ?Repair,or just put them outside rejected ?Or packed them and shipped them out of China ?
1.Color difference of each face ?
2.Broken,double and overlap film ?
3.Blisters or mended blisters?
4.Surface contaminations ?
5.Scratches and imprints of face and back
6.adhesive tape convexities
7.frosting and water marks
8.insect holes in the plywood
9.thickness of each core sheet or core veneer layers
10.face and back wavilness
12,film lumping ,carbonization and burning
13.edge qualtiy ,seal paint contamination
|Category of defects||Permissible amount of defects|
|1. Film crumbling on the edges||Not allowed|
|2. Inserted parts of the same type of film||Allowed by area of 0,1 cm2 in amount not more than 1 pc. on the board side surface|
|3. Inserted parts of another type of film||Allowed by area of 0,1 cm2 in amount not more than 1 pc. on the board side surface|
|4. Lack of film||Allowed by wigth not more than 2 mm in case of its painting|
|5. Paint leaking onto board surface||Allowed by wigth not more than 2 mm|
|6. Hollows out of film||Allowed by area of 0,1 cm2 inamount not more than 1 pc. on the board side surface|
|7. Separation, blisters||Not allowed|
|8. Film cracks and deflections||Not allowed|
|9. Stains out of open knots in inner plies of plywood panel (in case of strong film polymerization)||Not allowed|
|10. Stains out of cracks in inner plies of plywood panel||Not allowed|
|11. White stains and stripes on film, fired film||Allowed with limitations|
|12. Burnt film (burnout)||Not allowed|
|13. Film scratches||Not allowed|
|Note: 1. Defected places are covered with water-proof paint of the same film color.|