http://remodeling.hw.net/industry-news.asp?sectionID=157&articleID=534415
Excuse me Germex,
I would add in the topic that conjunctive with rice straw from francis teo.,
hope it may bring more reference/information for both. Gracia Senior
http://resources.alibaba.com/topic/449531/Build_Green_with_Rice_Husk.htm
regards One Uni
maybe this topic will bring your interest ?
http://resources.alibaba.com/topic/449531/Build_Green_with_Rice_Husk.htm
thanks & rgrds
One Uni
Rice husks are indeed interesting as an insulation, but the technology involved and the uses for the material are totally different. Due to its protein contents, straw can readily be compressed into boards, while rice husks only make sense as a lose infill.
By Germex
Germax:
Rice husks are indeed interesting as an insulation, but the technology involved and the uses for the material are totally different. Due to its protein contents, straw can readily be compressed into boards, while rice husks only make sense as a lose infill.
there are lots of rice husk particle board selling in the market already.... all you need to d
go to google.com type in " rice husk particle board"
You see the patent for such, and also you see the INDIA research development board doing such...
Even Vietnam and China is producing such rice husk particle board.... bear in mind you can simply type in ALIBABA, and you find many manufacturer.
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While for Rice Straw Board... you can find the manufacturer information if you make use of google. google it :
"rice straw board" you can find the invention state that in 1997 manufactured in USA. and there is also straw board...
rice husk board is more readily marketed worldwide.not waterproof material... but usable and cheap. and it is a natural pest resistant material, need no pesticide or toxic chemical.
Quoting from [germex]:
Replying to [vshanker]:
Hi Vijay,
Any kind of particle board is much weaker than "wholsome" wood (and sometimes almost friable). They are also very hygroscopic (absorbing water). Both characteristics are consequence of the fact that in the sawing or cutting process the individual fibers are frayed and partially segregated from each other. The viscosity of the glue is too high to go in between and repair this damage.
The advantages of MDF are dimensional stability, low cost and reuse of "waste" material. As MDF panels for doors are covered with some kind of veneer, they are pretty resistant to impacts. On the other hand, where you attach hinges and locks to the door, you have to insert pieces of wood to which you can fasten these items. If not, they will easily break out.
That's more or less the pros and cons in a nutshell.
Sorry to add in the note... thanks for pointing out the technology drawback....for MDF. which is really a no brainer to create MDF using compression and glue or binder.
But there are new technology that is available that solve the moisture retention and the strength problem... MDF is old technology, and WPC and FRC is the newest available in the market. whereby moisture retention and strength weaknesses are removed, replace with waterproof and strong composite.
the market is growing daily for such new technologies.
Quoting from [acsboy]:Hi acsboy
Replying to [germex]:
I am looking for alternatives to process agricultural waste, particularly rice straws because they are plenty of those straws within my area. If you have any input, that will be great. But it seems that converting to strawboard might be one of the cheapest way to use those straws.
Any ideas are certainly welcome.
sorry to interrupt... cos we are the manufacturing that are producing board that is made from rice hull or husk but not straw...
More than 13 years research and development has been placed into the development of such board. google yourself for "rice husk timber"
Most of the fiber or wood flour are extract from virgin material. to ensure that the ingredient
is from non toxic origin... this is not about recycling. or using of waste resources.
While others took waste material from toxic ridden preservative wood saw dust, heavy metal, ... therefore the composite or board created will contain toxic as well.
the only way to ensure that the board is free from toxic, rice husk powder is great whereby no toxic is introduced. and it is a great resource in creating fiber board
CSR and James hardies manufacture commercial quantities of the various fibre boards and compressed materials their web sites have technical information regarding their use.
The major problem with them is that they all react to moisture even the supposed waterprooof materials . ie they at least warp over time . Generally they are only applicable to and best suited for interior use.
Exterior materials need to be a little better to have a longer life of the building. light framed buildings are only going to last 50 years max in timber. These days the design life of a lot of new commercil work is 10-12 years.
Concrete is actually cheaper in most markets.
The original low cost was cut the trees down . slab or mud. and straw.
We Are Mdf Producer from bagasse, Bagasse is the only plant residue that used now in this industry, silica content of rice price straw is realy a big probem , even you succeed to produce mdf from rice straw the product can not compete with the same made from other raw material.
In china they are using rice and wheet straw in particle board but using MDI glue instead Uf glue..
SOLIMAN
SOLIMAN