To provide a kenaf board capable of suppressing emission of formaldehyde.
This kenaf board is formed by bonding kenaf fibers obtained by opening the kenaf with an adhesive containing formaldehyde. An adsorbent for adsorbing formaldehyde and binding is stuck on the surface of the board. It is possible thereby to adsorb formaldehyde in the kenaf board by reacting and binding formaldehyde with the adsorbent. Especially, as the kenaf fibers have a large fiber diameter, relatively large and communicating gaps are formed among the kenaf fibers, and it is possible therefore to easily adsorb formaldehyde in the kenaf board through these gaps with the adsorbent.
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