Compreg

…Thin veneers are impregnated with phenolic resin and then heat-cured under high pressure to produce hardened laminated lumber, which shows extremely high strength, but is only used for special purposes today. There is also a type of compressed lumber called "compressed lumber" that uses the same principle, but is made by first impregnating wood with synthetic resin (mainly phenolic resin) and then compressing it under high pressure to reduce the cell voids and make the fibers denser, thereby increasing strength. Products that are impregnated with preservatives, insect repellents, or fire retardants, or that are mixed into the adhesive during manufacturing and heat-pressed, such as preservative-resistant lumber, preservative-resistant plywood, insect-resistant lumber, insect-resistant plywood, termite-resistant lumber, termite-resistant plywood, flame-retardant lumber, and flame-retardant plywood, will likely become important products in the future. …

*Some of the terminology explanations that mention "compreg" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…薄い単板にフェノール樹脂を含浸させ，高い圧力をかけて加熱硬化させた硬化積層材はきわめて高い強度を示すが，今日では特殊な用途にしか用いられない。また，これと同じ原理であるが木材に合成樹脂(おもにフェノール樹脂)をあらかじめ浸透させておき，これを高い圧力で圧縮して細胞空隙（くうげき）を縮小し，繊維を緻密（ちみつ）にして強度を高めた圧縮木材compregなどもある。防腐剤，防虫剤，防火剤を製品に含浸させたり，製造時に接着剤に混入して熱圧接着した防腐木材，防腐合板，防虫木材，防虫合板，防蟻木材，防蟻合板，難燃木材，難燃合板などは今後重要な製品となろう。…

※「compreg」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報