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Manufacture of pressed boards

阅读:392发布:2023-07-08

专利汇可以提供Manufacture of pressed boards专利检索,专利查询,专利分析的服务。并且Gaseous reactive or polymerizable compounds and a gaseous catalyst are incorporated into lignocellulosic particles or fibers, and the compounds are reacted or polymerized in the presence of the catalyst to form a binder during hot pressing of the particles or fibers to form a board.,下面是Manufacture of pressed boards专利的具体信息内容。

  • 2. The process of claim 1 wherein the binder constituents have a reactive group capable of a condensation reaction in the presence of the catalyst.
  • 3. The process of claim 1 wherein the binder constituents are phenol and formaldehyde, and the catalyst is ammonia.
  • 4. A process for manufacturing a board from particulate lignocellulosic material which comprises: a. suspending lignocellulosic material in a current of inert gas, the degree of fineness of the lignocellulosic material and the gas current speed being correlated to form a fluidized bed of the lignocellulosic material; b. incorporating a gaseous monomeric constituent of a resinous binder into the particulate lignocellulosic material by means of the current of inert gas; c. removing the particulate material from the fluidized bed of Step (b); d. incorporating a liquid monomeric constituent of a resinous binder into the particulate material of Step (c) by spraying; e. suspending the particulate material from Step (d) in a current of inert gas, the gas current speed being corRelated to form a fluidized bed of the said particulate material; f. incorporating a gaseous catalyst into the particulate material of Step (e); g. removing the particulate material from the fluidized bed of Step (f); and h. forming a binder of said materials incorporated into the particulate lignocellulosic material during hot pressing of the lignocellulosic material into a board.
  • 5. The process of claim 4 wherein the binder constituents have a reactive group capable of a condensation reaction in the presence of the catalyst.
  • 6. The process of claim 4 wherein the binder constituents are phenol and formaldehyde, and the catalyst is ammonia.
  • 7. The process of claim 6 wherein the phenol is applied in the gaseous state, the formaldehyde is applied in a liquid state, and the ammonia is applied in a gaseous state.
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