Method for producing formaldehyde-free artificial boards from hemp stalks

A manufacturing method and technology of wood-based panels, applied in the direction of manufacturing tools, flat products, and pretreatment of molding materials, etc., can solve problems affecting large-scale industrial applications, high manufacturing costs of wood-based panels, and heavy boards, and achieve improvement Pasting effect, improving adhesive effect, improving the effect of weak acidity

Inactive Publication Date: 2019-03-19
上海世崛资产管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These wood-based panels made of formaldehyde-containing adhesives will release formaldehyde during the service life of the panels, which will affect human health
In addition, the use of this type of formaldehyde-containing adhesive glue requires a large amount of glue in the wood-based panel manufacturing process.
In addition, the wood-based panels made of wheat and corn stalks, due to the characteristics of these crops, even if other formaldehyde-free adhesives are used, there is still the problem of a large amount of sizing, which leads to high production costs of wood-based panels. The defect of its own heavy quality affects its large-scale industrial application

Method used

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  • Method for producing formaldehyde-free artificial boards from hemp stalks
  • Method for producing formaldehyde-free artificial boards from hemp stalks
  • Method for producing formaldehyde-free artificial boards from hemp stalks

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In the first step, the collected jute stalks are coarsely crushed, then compressed and packaged for storage. Coarsely crushed jute stalks are dried by a tumble dryer so that their moisture content is within the range of 9% to 17%. The dried jute stalks are then passed through wind selection and other equipment to remove impurities such as iron and stones, and then enter the fine grinder to be crushed to a fineness of 20-50 meshes. Sorting jute stalks according to fineness and removing dust. The jute stalks are sieved into 20-30 mesh fineness and 30-50 mesh fineness according to the fineness, and sent to the core layer silo and surface layer silo accordingly.

[0029] Step 2: Weigh the crushed jute stalks in different silos, measure their moisture content with a moisture tester, and send them to different mixers respectively, and use PLC to control the glue spraying device to spray glue, and control according to the corresponding weight Glue spraying amount, control th...

Embodiment 2

[0036]In step one, the collected kenaf stalks are coarsely crushed, then compressed and packaged for storage. Coarsely crushed kenaf stalks are dried by a tumble dryer so that the moisture content is within the range of 9% to 17%. The dried kenaf stalks are then passed through wind selection and other equipment to remove impurities such as iron and stones, and then enter the fine grinder to be crushed to a fineness of 20-50 meshes. Sorting kenaf stalks according to fineness and removing dust. The kenaf stalks are sieved into 20-30 mesh fineness and 30-50 mesh fineness according to the fineness, and sent to the core layer silo and surface layer silo accordingly.

[0037] Step 2: Weigh the crushed kenaf stalks in different silos, measure their moisture content with a moisture tester, send them to different mixers respectively, and use PLC to control the glue spraying device to spray glue, according to the corresponding weight Control the amount of glue sprayed, and control the...

Embodiment 3

[0044] In the first step, the collected kenaf stalks and flax stalks are coarsely crushed, and then compressed and packaged for storage. The coarsely crushed mixed hemp stalks are dried by a tumble dryer so that the moisture content is within the range of 9% to 17%. The dried mixed hemp stalks are then passed through wind selection and other equipment to remove impurities such as iron and stones, and then enter the fine grinder to be crushed to a fineness of 20-50 mesh. Sorting the mixed hemp stalks according to the fineness and removing the dust. The mixed hemp stalks are sieved into 20-30 mesh fineness and 30-50 mesh fineness according to the fineness, and sent to the core layer silo and surface layer silo accordingly.

[0045] Step 2: Weigh the crushed and mixed hemp stalks in different silos, measure their moisture content through a moisture tester, and send them to different mixers respectively, and use PLC to control the glue spraying device to spray glue, according to ...

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Abstract

The invention provides a method for producing formaldehyde-free artificial boards from hemp stalks. The method for producing the formaldehyde-free artificial boards from the hemp stalks is characterized in that hemp crop stalks are used as raw materials and crushed to the fineness of 20-50 mesh, polymeric MDI adhesive with a weight of 2%-8% of the hemp crop stalks and a non-formaldehyde modifier with a weight of 2%-5% of the hemp crop stalks are added, and artificial boards are produced through mixing and stirring, pressing formation and post-processing. The method for producing the formaldehyde-free artificial boards from the hemp stalks utilizes the excellent structural characteristics of the hemp crop stalks, and realizes the technical method of large-scale production of the formaldehyde-free artificial boards from the hemp crop stalks.

Description

technical field [0001] The invention relates to the technical field of formaldehyde-free wood-based panels, in particular to a method for manufacturing formaldehyde-free wood-based panels using hemp crop stalks as raw materials. Background technique [0002] Traditional wood-based panels are made of wood, such as plywood, fiberboard, particleboard, blockboard, oriented structure board, etc. With the development of the economy, people's demand for wood has increased sharply. Large-scale felling of trees has seriously damaged the ecological environment, and also led to a sharp decline in wood resources, affecting the source of raw materials for wood-based panels. At present, the existing technology realizes the use of crop straws such as wheat and corn to replace wood to make wood-based panels, but when manufacturing such wood-based panels, urine-formaldehyde glue or phenol-formaldehyde glue is required, or direct use of formaldehyde and other adhesives. Synthetic glue. Thes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N3/00B27N3/08B27L11/08C08G18/76
CPCB27L11/08B27N1/00B27N1/003B27N3/002B27N3/007B27N3/08C08G18/7664C08G18/7671
Inventor 忻维钟陈冬冬
Owner 上海世崛资产管理有限公司
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