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Method for preparing low-formaldehyde melamine plates

A melamine board and low-formaldehyde technology, which is applied in the direction of manufacturing tools, flat products, and pretreatment of molding materials, can solve the problems of high energy consumption, large investment, and various types of equipment, so as to protect the environment, reduce investment, The effect of reducing energy consumption

Inactive Publication Date: 2018-06-05
贺州宝兴新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common plate processing uses different equipment and processes to process different raw materials. The disadvantage is that there are many types of equipment, large investment, and the energy consumption caused by turning on multiple equipment is also high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a. hammer the wheat straw with a hammer mill;

[0021] b. adding wet retting treatment to the wheat straw after hammering until the wheat straw fibers are completely soaked, then adding a melamine solution with a concentration of 8%, the amount of which is 8% of the weight of the material, and the holding time is 5h;

[0022] D. adding glue to the material after step c processing, the added glue is melamine modified urea-formaldehyde glue, and its add-on is 190kg / m3;

[0023] e. Drying, paving, hot pressing, cooling, trimming and sanding of the board after adding glue.

[0024] The measured formaldehyde content is 1.2mg / 100g, which is lower than the national standard of 8mg / 100g.

Embodiment 2

[0026] a. Slice the cotton stalk with a slicer;

[0027] b. Adding a concentration of 10% melamine solution to the sliced ​​cotton stalks, the amount added is 10% of the weight of the material, and the holding time is 8h;

[0028] c. heat grinding and adding glue to the material after step b treatment, the added glue is melamine modified urea-formaldehyde glue, and its addition is 170kg / m3;

[0029] d. Drying, laying, hot pressing, cooling, edge trimming and sanding of cotton stalk fibers after adding glue.

[0030] The formaldehyde content is 1.8mg / 100g, which is lower than the national standard of 8mg / 100g.

Embodiment 3

[0032] a. Slice the wood chips with a slicer;

[0033] b. Adding a concentration of 12% melamine solution to the sliced ​​wood chips in an amount of 12% of the weight of the material and keeping it for 10 hours;

[0034] c. heat grinding and adding glue to the wood chips after step b treatment, the added glue is melamine modified urea-formaldehyde glue, and its addition is 150kg / m3;

[0035] d. Drying, paving, hot pressing, cooling, trimming and sanding of the board after adding glue.

[0036] The formaldehyde content is 1.5mg / 100g, which is lower than the national standard of 8mg / 100g.

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PUM

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Abstract

The invention relates to a method for preparing low-formaldehyde melamine plates, in particular to a method for preparing low-formaldehyde melamine plates. The method for preparing the low-formaldehyde melamine plates includes steps of raw material pretreatment, glue adding, drying, laying, hot-pressing, cooling, edge cutting and sanding. The method is characterized in that hammer-milling is carried out on wheat straw by smashing machines in pretreatment procedures, the hammer-milled wheat straw is humidified and degraded, and then cyanurotriamide solution is added into the wheat straw; cottonstalk and wood chips are sliced, and then cyanurotriamide solution is sprayed on the cotton stalk and the wood chips. The method has the advantages that the wheat straw, the cotton stalk and the woodchips are processed, accordingly, the contents of formaldehyde in plates can be reduced to a great extent, and environments can be protected; the equipment input further can be reduced, accordingly,energy consumption can be lowered, and the cost can be saved.

Description

technical field [0001] The invention relates to a preparation method of a low-formaldehyde melamine board, in particular to a preparation method of a low-formaldehyde melamine board. Background technique [0002] At present, most of the boards on the market are products obtained by ordinary production methods, and their formaldehyde content is relatively high, generally above the national standard of 8mg / 100g. The finished boards need to be ventilated and aired for a long time. Even so, formaldehyde cannot Disperse completely. If the formaldehyde content in the board is high, it will cause serious harm to human health. In recent years, relevant technical personnel in the field of boards have been studying how to reduce the formaldehyde content in boards, but have not found a suitable method. [0003] In addition, in the production of various boards, a single wheat straw, straw, cotton stalk or wood chip is usually used as a raw material, and they are processed by processes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/02B27N1/00B27L1/00B27N3/00C08G12/38C09J161/30
CPCB27N3/02B27L1/00B27N1/00B27N1/003B27N3/002C08G12/38C09J161/30
Inventor 张万龙
Owner 贺州宝兴新材料股份有限公司