| 摘要 |
A wall plank structure composed of an upper panel, a lower panel and an interconnecting layer interconnected therebetween and made of PU foaming agent. Two lateral sides of the upper and lower panels are respectively formed with left and right side walls which are continuously bent and respectively formed with a projection and a recess in the same direction for inserting with each other. The inner sides of the opposite left and right side walls of the upper and lower panels are disposed with adjoining layers formed of films for adjusting the distance between the upper and lower panels as necessary in the manufacturing procedure so as to obtain various thicknesses of the wall plank.
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