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Cotton stalk artificial boards and its production method

A production method and wood-based panel technology, applied in the direction of manufacturing tools, other household appliances, and pretreatment of molding materials, can solve problems such as uneven glue mixing, more fiber damage, and poor shape, so as to avoid uneven glue mixing, Effect of improving waterproof performance and reducing production cost

Active Publication Date: 2009-09-30
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 production method of 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 skin core separator becomes a small section of 10-30 mm, which contains about 10% of impurities. Wind separation removes impurities and residual cotton husks to obtain cotton stalk cores with a purity rate of >93%. The moisture content of the cotton stalk core is controlled at 30-40%, and it is processed into fragments with a width of 4-5mm and a thickness of 0.2-0.5mm by a flaker, and the pulp core is removed by winnowing. The crushed material is dried, and the moisture content is controlled at 2 to 6%. Urea-formaldehyde resin is used as the adhesive, and the sizing amount is 20% of the weight of the cotton stalk core. The airflow paver is used to make use of its sorting capacity to f...

Embodiment 2

[0035]A production method of 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 skin core separator becomes a 10-30mm section containing about 10% of impurities. Wind separation removes impurities and residual cotton husks to obtain cotton stalk cores with a purity rate of >93%. The moisture content of the cotton stalk core is controlled at 30-40%, and it is processed into fragments with a width of 4-5mm and a thickness of 0.2-0.5mm by a flaker, and the pulp core is removed by winnowing. The crushed material is dried, and the moisture content is controlled at 2 to 6%. Adhesive is made of isocyanate, the sizing amount is 10% of the weight of the cotton stalk core, kraft paper is used as the bottom before paving, and the airflow paving machine is used to form a fine ...

Embodiment 3

[0037] A production method of cotton stalk fiberboard. It uses a cotton stalk skin core separator to separate cotton stalks into cotton stalk cores and cotton stalk skins, degumming the cotton stalk skins into cotton skin fibers, and use cotton skin fibers as raw materials to produce cotton stalk fiberboards. Collect the separated cotton stalk bark and use the technology and production line of "a cotton stalk bark fiber and its degumming processing method" published by Chinese Patent Application No. 200810031539.8. The process flow is cotton stalk bark→drying and softening→ultrasonic treatment→pressing Flat → scouring and bleaching → pressing dry → washing with hot water → pressing dry → oiling → pressing dry → drying → softening → ribbon-like refined fiber. Use a carding machine to comb the cotton stalk bark fibers into fiber bundles with a length of 80-100 mm, control the moisture content at about 4% after drying, use urea-formaldehyde resin as an adhesive, and sizing amount of ...

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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 and using 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 raw material artificial board, in particular to a production method of a cotton stalk artificial board. Background technique [0002] Wood-based panels are generally produced from plant fibers. The production process is essentially a process of separation and reorganization, that is, the raw materials are decomposed into certain units, and then recombined under the action of adhesives. Innovations in the technical field of wood-based panels are generally developed for the types of raw materials, unit shapes and adhesives. At present, there are a large number of open technologies in the production of wood-based panels using wood fibers as raw materials, and the research on non-wood fibers as raw materials is paying attention to those skilled in the art. Among them, crop stalks are one of the main raw materials, which are rich in resources and renewable. Resources are conducive to the development of c...

Claims

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Application Information

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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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