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Flame-retardant oriented strand board and preparation process thereof

A particleboard and flame retardant technology, applied in the field of flame-retardant oriented strand board and its preparation, can solve the problems of flame-retardant oriented Strong loss performance and improved flame retardant performance

Inactive Publication Date: 2019-11-05
TREEZO NEW MATERIAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The flame retardants used in the above preparation method are nitrogen-phosphorus compounds or borate compounds, but inorganic flame retardants such as nitrogen-phosphorus compounds or borate compounds have strong hygroscopicity and poor loss resistance, resulting in the obtained Flame-retardant oriented strand board is not suitable for use in environments with high relative humidity, and the flame-retardant life is short

Method used

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  • Flame-retardant oriented strand board and preparation process thereof
  • Flame-retardant oriented strand board and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A kind of phosphoric acid-activated chitosan / MPB composite flame retardant of the present embodiment, its preparation method comprises the following steps: (1) prepare phosphorylated chitosan: in 200g mass fraction, add 20g chitosan in the phosphoric acid aqueous solution of 85% Sugar, stir quickly and evenly, then heat up to 120°C, and react at 120°C for 2h to generate phosphorylated chitosan.

[0037] (2) Preparation of melamine borate phosphate:

[0038] (a) Add 20g of phosphoric acid and 6g of ammonium dihydrogen phosphate to 200g of water, react at 50°C for 20 minutes, add 20g of melamine, react for 2.5 hours, cool, vacuum filter, wash and dry to obtain a white solid, which is phosphoric acid Melamine (MP).

[0039] (b) Add 30g MP into 20mL 20% boric acid aqueous solution, react at 80°C for 2.5h, cool, vacuum filter and dry to obtain melamine phosphate borate (MPB).

[0040] (3) Slowly add 20 g of chitosan phosphate and 20 g of MPB into 300 g of water, and stir r...

Embodiment 2

[0042] This embodiment is a flame-retardant adhesive, and its preparation method comprises: adding 10 g of the phosphoric acid-activated chitosan / MPB compound flame retardant prepared in Example 1 into 50 g of urea-formaldehyde resin, stirring, and mixing evenly to obtain the present invention. The flame retardant adhesive A of the embodiment.

[0043] And, 10g of MPB was added to 50g of urea-formaldehyde resin, stirred, and mixed evenly to obtain the flame-retardant adhesive B of this embodiment.

Embodiment 3

[0045]In this embodiment, a flame-retardant oriented strand board includes a core layer and surface layers arranged on both sides of the core layer. The preparation process of the flame-retardant oriented strand board includes the following steps:

[0046] (1) Put 100 parts of coarse shavings (the length of coarse shavings is between 60-120mm, width 5-20mm, thickness 0.2-0.8mm), 20g of flame-retardant adhesive B into a mixer and stir well, continue to add The paraffin emulsion accounting for 0.35% of the mass of the coarse shavings and the ammonium chloride accounting for 1% of the mass of the flame-retardant adhesive B are stirred evenly to obtain the core layer slurry;

[0047] (2) Put 74 parts of fine shavings (the length of the fine shavings is less than 60mm, the width is 5-20mm, and the thickness is 0.2-0.8mm), 10g of sawdust, and 16g of flame-retardant adhesive A. 0.6% of the mass of coarse shavings of paraffin emulsion and 1% of ammonium chloride by mass of the flame-r...

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Abstract

The invention discloses a flame-retardant oriented strand board and a preparation process thereof. The strand board comprises a core layer and surface layers located on the two sides of the core layer, wherein flame retardants in the surface layers are compounds of phosphorylated chitosan and melamine phosphate borate; and a flame retardant in the core layer is melamine phosphate borate. The melamine phosphate borate is low in hygroscopicity and high in loss resistance, and can be used for performing a charring layer at the high temperature, and therefore high flame retardancy and the long flame retardancy life are achieved; the flame retardants in the surface layers further comprise the phosphorylated chitosan, hydroxyl and amino on the surface of the phosphorylated chitosan can react with formaldehyde, the release amount of free formaldehyde of the oriented strand board is reduced, the purpose of removing the formaldehyde is achieved, and the strand board is more environment-friendly; and moreover, the hygroscopicity of the melamine phosphate borate can be further reduced, and the flame retardancy of the oriented strand board is further improved.

Description

technical field [0001] The invention belongs to the technical field of particle board preparation, and in particular relates to a flame-retardant oriented structure particle board and a preparation process thereof. Background technique [0002] Oriented Strand Board (Oriented Strand Board, 0SB), also known as oriented strand board or Ozon board, is a kind of small-diameter wood, thinned wood, and wood core as raw materials, which are processed into long shavings (usually 40-100mm long) by special equipment. , 5-20mm wide, 0.3-0.7mm thick), a directional structure plate made by deoiling, drying, sizing, directional paving, hot pressing and other processes. [0003] In OSB, the surface flakes are arranged vertically and the core flakes are arranged horizontally. This criss-cross arrangement reorganizes the wood grain structure and completely eliminates the influence of wood internal stress on processing, which makes OSB have extraordinary features. Easy processing and moistur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/10B27N3/14B27N3/00C09J161/24C09J11/06C09J11/08
CPCB27N3/002B27N3/10B27N3/14C08L2201/02C09J11/06C09J11/08C09J161/24C08L5/08C08K5/34928
Inventor 沈亚伦王诚徐俊毕海明刘昊
Owner TREEZO NEW MATERIAL TECH GRP CO LTD
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