About Freeword: "plywood"

List  | Prev.  | Next

---

PDF :	09030102.pdf
title(En) :	Studies on Testing of Surface-Treated Plywood. II. Adhesive Strength of Coat Film to Base of Printed and Pre-Finished Plywoods by Peeling Test
author(En) :	Shinji Hirai, Yoji Kikata, Hiroyuki Honda
information :	Mokuzai Gakkaishi 9(3), 102-106 (1963)
assort :	Original Article
summary(En) :	The authors experimented and studied a peeling test of coat film of printed and finished plywoods. Applying a part of veneer (Betula Maximowiziana REGEL) on the finished surface of plywood with an epoxy resin adhesive for a width of 10 cm, the plywood was slit 1 cm wide through the veneer and coat.    Gripping the free edge, the veneer strip was peeled with the coat film from the plywood at 15°, 20°, 25°, 30°, 35° angles (α), and the peeling force (P) was measured (Fig. 1).    Both the perpendicular component of the force Psinα and the moment effect P1/2sinα/2 vary lineally in relation to a respectively, so these are indicated by the following form:              Psinα + aP1/2sinα/2 = b                              (1)  here, a and b are constants.    On the other hand, regarding the veneer strip on the plywood as the elastic beam on the, elastic floor, the following formula is derived from the elastic equation:              σt = (4k/EI)1/4Psinα + 2k1/2P1/2sinα/2                   (2)  here, σt is adhesive strength of veneer strip with coat to plywood, E is YOUNG's modulus of strip, I is moment of inertia of strip and k is a constant.    Putting eq. (1) and (2) equivalent, k = a4/4EI, σt = (4k/EI)1/4 · b = ab/(EI )1/2. Thus the adhesive strength is calculated from experimental results, and these are shown in Table 2. Table 1 indicates the results on the veneer-overlaid plywood by the same method.