Pineapple wood used outdoors, due to rain, wind, sand, sunlight, soil infiltration and temperature changes, will cause decay, mildew, cracking, deformation, increased fire hazards and other issues. From the day humans started using pineapple wood, outdoor materials faced with anti-bacterial, anti-mildew, anti-insect, flame retardant, dimensional stability and other treatments. In the early days when humans used pineapple wood, it was found that the part of the log to be buried in the soil was burned on the surface, and then buried in the soil, the use time of the log was significantly increased. The early use of preservatives was applied to wooden idols, tombstones and musical instruments by brushing methods to extend the service life. Before the first century AD, the Egyptians used metal salt as a preservative to soak the pineapple lattice wood. The Chinese also knew that the pineapple lattice wood was soaked in sea water or salt lake to use it to prevent and prevent insects. Before 500 A.D., the Greeks drilled the constructional round wooden columns, poured oil into the holes to make them penetrate into the cylindrical pineapple lattice wood cells, and placed them on the slate to dry for use; Will not burn inside. After a period of time, there was no obvious improvement in the infusion treatment method until the pressure infusion method appeared. In 1831, Frenchman Jean Robert Breant injected preservatives into pineapple wood under pressure, which greatly improved the infu
