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Author
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Topic: Wood Fiber or Flour?
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donaloriain
Senior Member Posts: 12
From:Ireland
Registered: Apr 2003
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posted April 28, 2004 11:52 AM
  
I am currently working on a new project involving the production of extruded profiles using Wood-Poly Composites. I am having difficulty however in finding out the pros and cons of using wood flour as opposed to wood fiber. I am aware of the reinforcement differences between the two in terms of the difference in aspect ratio. However is there any major differences in the compounding characteristics of flour and fiber?------------------
Woodie IP: Logged |
JeffroDoe
Member Posts: 1
From:North Myrtle Beach, SC, USA
Registered: May 2004
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posted May 07, 2004 06:29 PM
There really isn't a difference in the compounding characteristics, however, the method of extrusion must be chosen carefully, depending upon which form you decide on.Personally, my experience is in fiber and PE, using a heated die and a non heated barrel. The fiber composite is firmer and more stable as it exits the die, while a finer or more powdery wood produces something similar to oatmeal. In my experience, fiber is easier to deal with than flour. In addition, the strength of the extrusion seems to be better with the fiber. I suppose that the fiber particles, when most are lined up in the same direction during extrusion, create a type of girder-support system. This results in a stronger board when you are extruding at a thickness of 1" or more. [This message has been edited by JeffroDoe (edited May 07, 2004).] IP: Logged |
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