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Cotton stalk artificial boards and its production method

A production method and technology for wood-based panels, applied in the direction of manufacturing tools, other household utensils, pretreatment of molding materials, etc., can solve the problems of uneven mixing, poor shape, and many fiber damage, so as to avoid uneven mixing, The effect of reducing production cost and improving waterproof performance

Active Publication Date: 2012-09-12
姜景文 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem existing in the current production method of cotton stalk particleboard is: the cotton stalk is directly crushed as raw material, because the cotton stalk bark is not selected or the selection is not clean, resulting in bast fiber agglomeration and fire during the production process, In the process of sizing, due to the existence of bast fiber, uneven glue mixing is easy to occur. Due to the existence of wax and silicon in the cotton stalk skin, the glue force decreases, and the product quality has insufficient strength, high moisture absorption expansion rate and Problems such as large warpage
The main problems existing in the current cotton stalk fiberboard production method are: because the fiber cell structure and chemical characteristics of the cotton stalk core are not the same as those of wood, the fiber yield after thermal grinding is low, the shape is poor, and the fiber damage is much, that is, the fiber The quality is not high, so the production of crop straw fiber-based panels at home and abroad is still in the laboratory stage
[0006] At present, the cotton stalk skin core is separated by a mechanized method, and the method of producing cotton stalk wood-based panels with cotton stalk core and cotton stalk skin fibers as raw materials has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for producing a cotton stalk particle board. It uses a cotton stalk skin core separator to separate cotton stalks into cotton stalk cores and cotton stalk skins, and uses cotton stalk cores as raw materials to produce particle boards. The cotton stalk core separated by the cotton stalk sheath core separator becomes a 10-30mm small section, containing about 10% impurities. Air separation removes impurities and residual cotton husks to obtain cotton stalk cores with a purity rate > 93%. Control the moisture content of the cotton stalk core at 30-40%, process it into pieces with a width of 4-5mm and a thickness of 0.2-0.5mm through a flaker, and remove the pith core by winnowing. The crushed material is dried, and the moisture content is controlled at 2-6%. The adhesive adopts urea-formaldehyde resin, and the sizing amount is 20% of the weight of the cotton stalk core. The air paving machine is used to form slabs by using its sorting ability. The pavement thic...

Embodiment 2

[0035]A method for producing a cotton stalk particle board. It uses a cotton stalk skin core separator to separate cotton stalks into cotton stalk cores and cotton stalk skins, and uses cotton stalk cores as raw materials to produce particle boards. The cotton stalk core separated by the cotton stalk sheath core separator becomes a 10-30mm segment containing about 10% impurities. Air separation removes impurities and residual cotton husks to obtain cotton stalk cores with a purity rate > 93%. Control the moisture content of the cotton stalk core at 30-40%, process it into pieces with a width of 4-5mm and a thickness of 0.2-0.5mm through a flaker, and remove the pith core by winnowing. The crushed material is dried, and the moisture content is controlled at 2-6%. The adhesive is isocyanate, and the glue amount is 10% of the weight of the cotton stalk core. Before paving, kraft paper is used as the bottom, and the air-flow paving machine is used to make use of its sorting abil...

Embodiment 3

[0037] A production method of a cotton stalk fiberboard. It uses cotton stalk sheath core separator to separate cotton stalks into cotton stalk core and cotton stalk sheath, degumming cotton stalk sheath to produce cotton husk fiber, and using cotton husk fiber as raw material to produce cotton stalk fiberboard. Collect the separated cotton stalk husks, and use the technology and production line of "a cotton stalk husk fiber and its degumming processing method" published in Chinese Patent Application No. 200810031539.8. Smoothing→boiling and bleaching→pressing and drying→rinsing with hot water→pressing and drying→oiling→pressing and drying→drying→softening→ribbon-shaped fine-dried fibers. Use a carding machine to comb the cotton stalk skin fibers into fiber bundles with a length of 80-100 mm. After drying, the moisture content is controlled at about 4%. Urea-formaldehyde resin is used as an adhesive, and the amount of glue is 10% of the weight of the cotton stalk skin. The di...

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Abstract

The present invention relates to a cotton stalk artificial board and its production method. Its raw materials are the separated cotton stalk bast and cotton stalk core. After the cotton stalk bast is degummed, cotton stalk bast fiber will be generated. Cotton stalk particle boards and cotton stalk fiberboards are produced by using cotton stalk core and cotton stalk bast fiber as raw materials andusing MDI or UF resin as adhesive. The beneficial effect of the present invention: in current production of cotton stalk boards, cotton stalk is pulverized and directly used as raw material, and agglomeration, fire and other defects may happen during production. In comparison, the present invention eliminates these defects and solves the problems of low product strength, and has high moisture regain and low fiber quality.

Description

technical field [0001] The invention relates to a production method of a non-wood material-based panel, in particular to a production method of a cotton stalk-based panel. Background technique [0002] Wood-based panels are generally produced from plant fibers. The production process is essentially a process of separation and recombination, that is, the raw materials are decomposed into certain units, and then reassembled under the action of adhesives. Innovations in the technical field of wood-based panels are generally carried out for raw material types, unit forms and adhesives. At present, there are a large number of open technologies for the production of wood-based panels using wood fibers as raw materials, and the research on non-wood fibers as raw materials is attracting the attention of those skilled in the art. Among them, crop straw is one of the main raw materials, and its resources are abundant and renewable. resources, which is conducive to the development of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/02B27N1/00B27N3/08B27N3/04C09J161/24
Inventor 姜景文凌受明李漫文
Owner 姜景文
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