Heat resistance brick

The invention relates to an improved heat resistance brick, which comprises an upper board and a lower board, said upper board being made of solid polylone, said lower board being made of the mixture of wooden chips and urea by means of press molding process, said upper and lower boards being arranged to provide water outlets, and said lower board being arranged to provide well-shaped drainage canals at the bottom so as to match with said water outlets for water drainage. By means of the color change on the upper board, the bricks are arranged on the roof to provide preferred patterns to make the roof more attractive. By means of the utilization of waste material to produce lower board to reduce the manufacturing cost. By means of said arrangement to provide good heat resistance bricks for practical use.

BACKGROUND AND SUMMARY OF THE INVENTION 
During hot summer season, direct sunlight may radiate over the roof to 
incubate the houses. Therefore, there must be some heat isolating or 
resistance arrangement on the roof. Somebodies may build up a frame 
structure on the roof and arrange corrugated plate on the top of the frame 
structure to keep direct sunlight away from the roof. However, the build 
up frame structure on the roof may violate the provisions of the building 
code. Therefore, some other people may pave the roof with heat resistance 
bricks directly to isolate the heat. However, the heat resistance bricks 
that are commonly used are not very practicable in application, of which 
the cost is expensive, the installation is difficult. Because the 
conventional heat resistance bricks are quite heavy, they are not 
convenient for delivery. During installation, if the size can not fit, the 
protruding portion is knocked off. Since heat resistance brick is very 
hard, it is very difficult to knock off the protruding portion, or if the 
protruding portion is knocked off, the rest of the brick may become 
irregular in configuration and bad in outer appearance. Further, the heavy 
weight of the bricks may become a big burden to the roof to serious affect 
the structure of the whole building. Moreover, the manufacturing process 
for producing conventional heat resistance bricks is rather complicated, 
and therefore, the manufacturing cost is very expensive. In view of said 
reasons, there is a strong demand for improved and inexpensive heat 
resistance brick to provide good performance in most efficient way. 
The present invention is to provide an improved heat resistance brick, 
which is featuring in that: 
(1) The brick, according to the invention, comprises an upper board made of 
solid polylone, having water outlet for water drainage; a lower board made 
of wooden chips and urea by means of press molding process, having 
drainage canal to match with the water outlet of the upper board for water 
drainage. Therefore, when the upper and the lower boards are stuck 
together the whole assembly provides less weight, good heat isolating 
effect, and the water outlet and drainage canal are well arranged to 
provide good water drainage effect. 
(2) Since the upper board is made of solid polylone, it can be arranged to 
provide assortment of colors. When the bricks are surfaced on the roof, 
they may be arranged according to preferred pattern, to provide a 
beautiful appearance. 
(3) Because the lower board contains wooden chips which are mixed with 
thermo setting plastics (urea) for press molding, the manufacturing cost 
of the present invention is inexpensive and the production process is easy 
to operate. Therefore, the present invention provides high economical 
value. 
(4) The wooden chips contained in the lower board provide good water 
absorbing effect. During raining and windy days, the lower board is 
increased in weight due to water absorption, and therefore, it stabilizes 
the whole assembly of the brick. Further, during installation of the 
bricks according to the invention, the bricks are tightly arranged one 
another to provide high tension, such that at regular time, the bricks 
will not be blown away even by strong wind force. 
(5) The heat resistance brick according to the invention is very light and 
convenient for delivery. In case the size does not fit, it can be 
strainghtly sawed into a preferred size to provide neat appearance. 
The above and other objects, features and advantages of the present 
invention will be fully understood from the following description 
considered in connection with the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIGS. 1, 2 and 3, a heat resistance brick according to the 
invention, comprises an upper board 1 and a lower board 2. Said upper and 
lower boards are stuck together by means of adhesive agent. Said upper 
board 1 is made of solid polylone to provide good weather proof and heat 
resistance properties. The term "polylone" is used herein to mean any type 
of foamed plastic material, including thermosetting resins or plastics, 
such as polyurethane foams. Various additives can be included in the 
plastics material to improve its properties, such as heat resistance and 
weatherability. The upper board 1 has four water outlets 10 to match with 
the water outlets 20 of the lower board 2. The outlets 20 are arranged in 
the well-shaped drainage canals 21 at the bottom of the lower board 2. 
Said lower board 2 is made of the mixture of wooden chips and urea 
(thermosetting plastics), by means of press molding process. Therefore, 
the manufacturing process for the heat resistance bricks according to the 
invention is very simple. Because the cost for the upper board 1 and the 
lower board 2 is very cheap, the invention provides high economical value. 
Referring to FIG. 4, the heat resistance bricks according to the invention 
are directly surfaced on the roof 3. Due to light weight, the loading on 
the roof is minimized, and high security is thus achieved. During raining 
days, the rain water is draining off through the water outlets 10 of the 
upper board 1, and the water outlets 20 and drainage canals 21 of the 
lower board 2. The wooden chips contained in the lower board 2 can absorb 
the water to increase the weight so as to stabilize the brick and to 
protect the brick against strong wind force. During installation, the 
bricks are tightly surfaced on the roof to provide high tension force 
among the bricks such that the bricks will not be blown away by strong 
wind force during regular time. While paving, the bricks for the side line 
may not fit perfectly in size. In order to fit the size, the bricks 
according to the invention can be sawed into preferred and neat size 
without damaging the outer appearance. Further, during the production for 
the upper board 1, it can be arranged to provide assortment of colors. 
Therefore, the bricks according to the invention can be surfaced on the 
roof 3 to provide beautiful patterns and to make the roof more attractive.