按制品壓縮強度p和表皮分為以下十類:
序號 | 名稱 | 表皮分類 |
a | X150-p>-150 kPa | 帶表皮; |
b | X200-p>200 kPa | 帶表皮; |
c | X250-p>250 kPa | 帶表皮; |
d | X300-p>300 kPa | 帶表皮; |
e | X350-p>350 kPa | 帶表皮; |
f | X400-p>400 kPa | 帶表皮; |
g | X450-p>450 kPa | 帶表皮; |
h | W500-p>200 kPa | 帶表皮; |
o | W200-p>200 kPa | 不帶表皮; |
j | W300--p>300 kPa | 不帶表皮; |