国产真人无码作爱免费视频,国内自拍视频青青在线视频,性久久久久久,最新精品国偷自产在线美女足,97国产精华最好的产品亚洲,日本一区二区三区免费高清,中文字幕欧美人妻精品一区,麻豆AV一区二区三区久久

The hollow board has a flexible design structure

 2017-11-04 num:

The top layer of the hollow board is made of wood veneer, which can basically eliminate the bamboo RIPS, but try to use melamine resin coated to increase wear resistance and surface hardness, whole sex and finish. Used for steel box corrugated board templates panel, should use modified melamine resin or alcohol soluble phenolic resin impregnated paper, impregnated paper number visible on the surface roughness and smoothness of the requirements.


Compared to the injection molding products, the hollow plate has the shockproof, flexible design structure, no need to open injection mold and other advantages. At the same time, the plate can be added by the control of flexible material antistatic, conductive masterbatch, etc., to produce which has the function of conductive, antistatic plastic hollow sheet plate, anti-static plate surface resistivity can be controlled between 106 ~ 1011. The resistivity of the conductive plate surface can be controlled between 103 and 105.