C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
C10L 5/06 (2006.01) C10L 5/44 (2006.01)
Patent
CA 2277086
Processes are provided herein for making a combustible article. One such process involves mixing finely-divided plant-fibre particles and finely-divided synthetic polymer, namely finely divided polyethylene particles or finely-divided polypropylene particles, to form a substantially-uniform mixture. The finely-divided, synthetic plastic materials are of a size which is small enough to be distributed in the substantially-uniform mixture so as to have great surface contact with the plant-fibre particles and to improve the bonding strength of the substantially-uniform mixture. The proportion of the finely-divided, plant-fibre to the finely- divided synthetic polymer is sufficient to provide a combustible article and to produce a structurally-solid composite without the use of any binder. The process further comprises heating the substantially-uniform mixture to a temperature below a flash paint of the mixture to form a pressable hot mixture. The flash point is defined as being a temperature which is sufficient to ignite, or at least to cause the substantially-uniform mixture to begin smoldering, at a temperature which is below the melting point of the synthetic plastic at one atmosphere pressure. The process further comprises pressing the pressable hot mixture in a briquette press at a pressure between 200 and 250 Kg/cm2, thereby to cause penetration of the finely-divided synthetic polymer particles into voids of the plant-fibre particles. This produces a structurally-solid composite (or log) without the use of binders. Such log has been found to burn longer and better than a comparable wood log, with less evolution of particulate matter. Such logs produce any power ashes, do not produce sparks, and burn well when mixed with other fuels.
La présente invention concerne un article combustible comportant des copeaux de bois agglomérés et une matière polyéthylène/polypropylène en partie recouverte de paraffine. La matière polyéthylène/polypropylène agit comme un combustible et comme un liant; on utilise de la paraffine pour faciliter l'inflammation. La bûche combustible composite est produite en mélangeant du bois et des copeaux de la matière polyéthylène/polypropylène dans un mélangeur; en mélangeant le tout pour produire un agrégat sensiblement uniforme et en chauffant à une température inférieure au point d'ébullition la matière polyéthylène/polypropylène; en compressant dans une presse le mélange chaud de manière à former une briquette ou une bûche combustible de forme préétablie; et en plongeant le bas de la bûche résultante dans de la paraffine fondue.
Beyer Curtis D.
Borden Ladner Gervais Llp
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