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Production process of MDF low-density high-strength board

A board production and high-strength technology, which is applied in the direction of wood processing equipment, manufacturing tools, and pretreatment of molding materials, etc., can solve the problem that the performance indicators of low-density fiberboard cannot meet the national standard of medium-density fiberboard, high cost, high density of medium-density fiberboard, etc. Problems, to achieve the effect of strong viscosity, stable performance, and improve the strength of the board

Inactive Publication Date: 2021-11-30
佳诺威集团(河南)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the density of medium density fiberboard is high in the prior art, the cost is relatively high in the process of processing, transportation and use, and the performance index of low density fiberboard cannot reach the national standard of medium density fiberboard, and the proposed A production process of MDF low-density high-strength board

Method used

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  • Production process of MDF low-density high-strength board

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Comparison scheme
Effect test

Embodiment 1

[0029] A kind of MDF low-density high-strength plate production technology proposed by the present invention comprises the following steps:

[0030] S1. Fiber preparation:

[0031] S11, adding the production raw material felling residue and the second-small fuelwood into the chipper for chipping to obtain a sheet material with a length of 20mm, a thickness of 2mm, and a width of 10mm;

[0032] S12. Place the flakes under steam at a temperature of 120°C and a pressure of 1.5 MPa for pre-cooking for 3 minutes, then add a treatment liquid of the same quality as the flakes, stir and mix evenly, grind and separate, and dry until the moisture content is 3%, get processed fiber material;

[0033] The above treatment solution is prepared by mixing the following raw materials in parts by weight: 15 parts of sodium hydroxide solution with a concentration of 5 mol / L, 4 parts of sodium hexametaphosphate, 2 parts of zinc acetate, 1 part of zirconia, and 2 parts of polyethylene wax;

[00...

Embodiment 2

[0045] A kind of MDF low-density high-strength plate production technology proposed by the present invention comprises the following steps:

[0046] S1. Fiber preparation:

[0047] S11, adding the production raw material crop straw and bagasse into a chipper for chipping to obtain a flake material with a length of 22 mm, a thickness of 3 mm, and a width of 12 mm;

[0048] S12. Place the flakes under steam at a temperature of 125°C and a pressure of 1.8 MPa for pre-cooking for 4 minutes, then add a treatment liquid of the same quality as the flakes, stir and mix evenly, grind and separate, and dry until the moisture content is 4%, get processed fiber material;

[0049] The above treatment solution is prepared by mixing the following raw materials in parts by weight: 16 parts of sodium hydroxide solution with a concentration of 6 mol / L, 5 parts of sodium hexametaphosphate, 3 parts of zinc acetate, 1.5 parts of zirconia, and 3 parts of polyethylene wax;

[0050] S2, adhesive prep...

Embodiment 3

[0061] A kind of MDF low-density high-strength plate production technology proposed by the present invention comprises the following steps:

[0062] S1. Fiber preparation:

[0063] S11. Adding the felling residues of production raw materials and crop straws to a chipper for chipping to obtain flakes with a length of 25 mm, a thickness of 4 mm, and a width of 15 mm;

[0064] S12. Place the flakes under steam at a temperature of 130°C and a pressure of 2 MPa for pre-cooking and pretreatment for 5 minutes, then add a treatment liquid of the same quality as the flakes, stir and mix evenly, grind and separate, and dry until the moisture content is 5 %, get the processed fiber material;

[0065] The above treatment solution is prepared by mixing the following raw materials in parts by weight: 18 parts of sodium hydroxide solution with a concentration of 8 mol / L, 5.5 parts of sodium hexametaphosphate, 3.5 parts of zinc acetate, 2 parts of zirconia, and 3.5 parts of polyethylene wax;...

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Abstract

The invention belongs to the technical field of artificial board production, particularly relates to a production process of an MDF low-density high-strength board, and solves the problems that in the prior art, a medium-density fiberboard is high in density and relatively high in cost in the processing, transporting and using processes, and the performance index of the low-density fiberboard cannot reach the national standard of the medium-density fiberboard. The production process of the MDF low-density high-strength board comprises the three steps of fiber preparation, adhesive preparation and fiberboard preparation. According to the invention, the fiber and the adhesive are respectively prepared and finally mixed with hollow filler for foaming to prepare the required board, the used raw materials are energy-saving and environmentally friendly, the preparation method is simple, the preparation conditions are mild, the obtained board is stable in performance and the density of the obtained board is as low as 0.28 g / cm<3> while the performance index requirements of the furniture type medium-density fiberboard used in a dry state in the national index (GB / T11718-2009) of the medium-density fiberboard are met.

Description

technical field [0001] The invention relates to the technical field of wood-based panel production, in particular to an MDF low-density high-strength board production process. Background technique [0002] Medium density fiberboard (medium density fiberboard, MDF) is made of wood fiber or other plant fiber as raw material, applied with urea-formaldehyde resin or other synthetic resin, and pressed under heat and pressure to a density of 0.50-0.88g / cm 3 range of plates, other suitable additives can also be added to improve the properties of the plates. MDF has good physical and mechanical properties and processing properties, and can be made into plates of different thicknesses, so it is widely used in furniture manufacturing, construction, and interior decoration. Medium-density fiberboard is a homogeneous porous material with good acoustic performance. It is a good material for making speakers, TV casings, and musical instruments. In addition, it can replace natural wood f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N1/02B27N3/00B27N3/04B27N3/18D21D1/20D21C3/00C08L63/00C08L1/14C08K5/5435C08K5/098
CPCB27N1/00B27N1/0209B27N3/002B27N3/04B27N3/18D21D1/20D21C3/00C08L63/00C08L1/14C08K5/5435C08K5/098
Inventor 梁殿伟陈勇余文彬
Owner 佳诺威集团(河南)新材料有限公司