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Method for manufacturing high-strength environmentally-friendly binderless particle board

A manufacturing method and particleboard technology, which can be applied to flat products, household components, household appliances, etc., can solve the problems of use limitation, restricting the development of glue-free particleboard, poor mechanical properties and dimensional stability of glue-free particleboard, etc. Significant market and environmental advantages, the effect of improving dimensional stability

Inactive Publication Date: 2011-11-23
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the similar adhesive components produced in the hot pressing process of conventional glue-free particleboards are relatively small, and there are problems such as poor mechanical properties and dimensional stability of glue-free particleboards, which restrict the use of glue-free particleboards, which seriously restricts the development of glue-free particleboards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Firstly, the wood-based panel sanding powder was re-crushed to obtain 100-mesh sanding powder, and then the sanding powder was immersed in papermaking black liquor for 30 minutes and then air-dried to obtain a sanding powder with a moisture content of 25%.

[0016] The sanding powder with a moisture content of about 25% obtained in the previous step and the shavings with a moisture content of about 25% are fully stirred and mixed according to the ratio of 1:9, and then paved into a 10mm thick slab. The design density of the slab is 0.8g / m 3 . Then adopt conventional glue-free particleboard hot-pressing process to press, hot-pressing temperature 190 ℃, hot-pressing time 13 minutes.

[0017] According to the conditions of this example, the parameters of the obtained glue-free particleboard are: the static bending strength reaches 10.2MPa, the internal bonding strength reaches 0.52MPa, and the 24h water absorption thickness expansion rate reaches 13.7%.

Embodiment 2

[0019] Firstly, the wood-based panel sanding powder is re-crushed to obtain 100-mesh sanding powder, and then the sanding powder is immersed in papermaking black liquor for 30 minutes and then air-dried to obtain a sanding powder with a moisture content of about 25%. .

[0020] The sanding powder with a moisture content of about 25% obtained in the previous step and the shavings with a moisture content of about 25% are fully stirred and mixed according to the ratio of 1:9, and then paved into an 8mm thick slab. The design density of the slab is 0.9g / m 3 . Then use the conventional glue-free particleboard hot-pressing process to press, the hot-pressing temperature is 200 ℃, and the hot-pressing time is 10 minutes.

[0021] Under the conditions of this example, the parameters of the obtained glue-free particle board are: the static bending strength reaches 11.7 MPa, the internal bonding strength reaches 0.59 MPa, and the water absorption thickness expansion rate reaches 10.2%...

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Abstract

The invention provides a method for manufacturing a high-strength environmentally-friendly binderless particle board. In the method, paper-making black liquor is applied to a particle board preparation process, abundant lignin, hemicellulose and other chemical components in the paper-making black liquor are utilized to prepare the high-strength environmentally-friendly binderless particle board; in the particle board hot-pressing process, the lignin and the hemicellulose in the black liquor and a part of lignin and hemicellulose of wood shavings perform a chemical reaction under the action of thermal moisture to generate massive components similar to binders, therefore the mechanical performance of the particle board is remarkably increased, and the size stability of the particle board is improved.

Description

technical field [0001] The invention belongs to the field of artificial board manufacturing, in particular to a method for manufacturing high-strength environment-friendly glue-free particle board. Background technique [0002] Particleboard is one of the important members of the wood-based panel family and can be widely used in furniture and interior decoration and other fields. Particleboard can be divided into glued particleboard and glueless particleboard. Adhesive particleboard refers to the particleboard with adhesives such as urea-formaldehyde resin glue added during the preparation process, which will release a certain amount of formaldehyde and other toxic gases during the preparation and use of the particleboard. Adhesive-free particleboard refers to a kind of particleboard that does not add any adhesive in the process of board preparation, and only relies on the similar adhesive components produced by the chemical changes of wood or non-wood particles in the proc...

Claims

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Application Information

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IPC IPC(8): B27N3/08
Inventor 郑霞徐剑莹李新功陈卫民
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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