JP2006055003A - Synthetic-wood heat-insulating structural material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic-wood heat-insulating structural material comprising a raw material durable as the structural material for window frames of houses, posts, beams and/or window frames of greenhouses each directly exposed to the outside air, and having a small corrosion ratio and lower thermal conductivity so as to be improved in thermal effect. <P>SOLUTION: The synthetic-wood heat-insulating structural material has enough strength to be used as the structural material for the window frames of the houses or the greenhouses, a remarkably small corrosion ratio, rich in durability and having a coefficient of thermal conductivity of 1/1,000 times that of aluminum. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention is a technique for maintaining the heat retaining effect of the inner surface by minimizing heat transfer using a structural material having a low thermal conductivity with respect to the structural material in contact with the inner and outer surfaces of the structure where a temperature difference occurs between the indoor surface and the outer surface in a greenhouse and a house .

Structural materials such as pillars, beams, and windows that are frequently used in greenhouses and houses have aluminum, iron, and dry wood thermal conductivity as shown below.

乾燥木材はアルミニューム材及び鉄材に比して極めて熱伝導率が低いことが知られています。
大塚徳勝 著 「そこが知りたい物理学」 共立出版 株式会社

Dry wood is known to have extremely low thermal conductivity compared to aluminum and iron.
Otsuka Tokusatsu "Physics I Want to Know" Kyoritsu Publishing Co., Ltd.

The thermal conductivity of synthetic wood is 0.23 to 0.24 W / mk, so it is considered to be almost equivalent to dry wood.

  At present, aluminum is the mainstream for structural materials such as house window frames, greenhouse pillars, beams, and window frames, although the thermal conductivity is 1000 times that of synthetic wood.

Dried wood has the advantage of very low thermal conductivity, but has the disadvantage of poor durability due to corrosion and deformation

The thermal conductivity of iron is 370 times that of dry wood, which is lower than aluminum, but has the disadvantage of becoming a structural material that is heavy due to oxidation corrosion and high specific gravity.

Providing structural materials that can be used as structural materials for house window frames and greenhouse pillars, beams, and window frames that are in direct contact with the outside air, and that have a low degree of corrosion and low thermal conductivity to further increase the thermal insulation effect. Is it possible?

Synthetic wood is used as a material with extremely low corrosion degree, high durability, and low thermal conductivity as a window frame and greenhouse structural material

Comparison of heat conduction in synthetic wood and aluminum under certain conditions is as follows: Setting conditions, internal temperature 20 ° C, external temperature 0 ° C, time 1 minute Conduction heat is aluminum 94.4 calories, synthetic wood 0 .092 calories and synthetic wood has a heat conduction of 1/1000 that of aluminum.
At present, the greenhouses that are commercially available in 3.3 cubic meters are in contact with the inner and outer surfaces of the structural materials at 20% to 25% of the total area. It has the effect of greatly preventing loss and keeping warm.
1 tsubo greenhouse See Figure 1

It is a skeleton three-dimensional view of a 1 tsubos greenhouse. Show foundations, columns, beams, window frames, etc.

Claims (1)

Atypical material molded from synthetic wood mixed with plastics and wood powder should be used as a heat insulating structural material for greenhouse pillars, columns, beams, window frames, and window frames and door frames of general houses.

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