JPS6189002A - Manufacture of symthetic-resin injecting treating wood in block material - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Various attempts have been made to produce synthetic resin injection-treated wood, but no perfect method has existed for thick block materials.

In other words, in block materials, the injection infiltration rate of synthetic resin decreases in proportion to the thickness of the wood, so wood species with a good injection rate are limited, such as birches, maples, beech, and other broad-leaved boreholes. Although methods of injecting synthetic resin into high-density materials and coniferous trees with low injection immersion rates through high-pressure treatment have been considered, uneven injection occurs and a huge amount of damage is caused. Currently, this method is far from practical use due to the high cost of injection equipment.

In addition, even for the above-mentioned wood species with a good injection infiltration rate, when synthetic resin is injected into the entire block material, the synthetic resin is expensive, so the injection-treated wood must also be extremely expensive. 1. Its uses are limited and it lacks versatility. For this reason, PL (Polymer
Lordi! Lg) Injection-treated wood with low injection infiltration of about 5 to 30% or injection-treated wood injected only to the surface are considered, but such methods do not allow compression, which is the combined effect of synthetic resin injection-treated wood. Only a small part of the strength, bending strength, shear strength, hardness, decay resistance, weather resistance, dimensional stability, etc. can be utilized.

The present invention is capable of solving such problems at once, and its structure is as follows: holes are formed in the cross section of a cut wood block with a hole diameter and a hole size determined according to the vA type and cross-sectional shape. is set perpendicular to the cross section, then professional, /
Synthetic resin monomers or oligomers are injected into the recycled material by a reduced pressure or reduced pressure-pressure method, and then cured by heating or other methods.

According to the method according to the present invention, (11) a hole made perpendicular to the cross section causes a situation similar to that in which the distance between the outer wall surface of the wood and the hole wall surface is shortened and the thickness of the wood becomes thinner; This makes it possible to uniformly inject synthetic resin throughout the entire wood, even for wood species with low injection infiltration rates. , and to prevent polymerization heat from remaining inside the wood due to polymerization, conventionally,
Internal cracks in the wood due to uneven injection that occurred when pouring into thick boards are resolved (3) By creating holes in the wood, the actual volume of the block material is reduced, so the amount of synthetic resin injected is reduced. (4) By reducing the actual volume of the block material, the weight of the wood can be reduced. I am convinced that this is an invention.

[Brief explanation of drawings]

FIG. 2 is a perspective view of a block material provided with holes according to the present invention.

Claims (1)

[Claims] A hole is made in the cross section of the block material (end surface and straight grain surface or board surface), a synthetic resin monomer or oligomer is injected into the hole and infiltrated into the wood, and the hardening effect produces synthetic resin injection treated wood. It's a method.