Composite flame retardant and method for preparation of flame retardant fiber board from the same

[0034] Example 1: Setting of compound flame retardant ratio scheme

[0035] In this test, the flame retardant addition amount was kept at 13%, and the L9 (34) orthogonal test was performed with the percentage of aluminum hydroxide, borax, and sodium silicate in the fiber content of the fiberboard as three test factors. Among them, the additive amount of aluminum hydroxide takes 3 levels: 4%, 5%, 6%; Borax takes 3 levels: 3%, 4%, 5%; Sodium silicate takes 3 levels: 2%, 3%, 4%. In order to avoid systematic errors caused by human factors, the factor level values ​​are not arranged from small to large or from large to small, but the three levels of each factor are "randomized".

[0036] Table 1 Factor level table

[0037]

[0038]

[0039] Table 2 Header design

[0040]

[0041] According to the design principle of the orthogonal experiment, 9 orthogonal experiment schemes are obtained, each scheme is a different ratio of aluminum hydroxide, borax, and sodium silicate. For example, the No

[0044] Example 2: Preparation of flame retardant fiberboard

[0045] 2.1 Test materials

[0046] Wood fiber: It is eucalyptus wood fiber, obtained from the production line of Guangxi Haolin Artificial Board Co., Ltd. without sizing, with a moisture content of 5-8%.

[0047] Urea-formaldehyde resin adhesive: taken from Guangxi Haolin Artificial Board Co., Ltd., viscosity 16.94s (coated-4 cups), pH 8.5.

[0048] Aluminum hydroxide: analytically pure, molecular formula Al(OH) 3 , Molecular weight 78, produced by Tianjin Bodi Chemical Co., Ltd.

[0049] Borax: analytically pure, molecular formula Na 2 B 4 O 7 ·10H2O, molecular weight 381.37, produced by Tianjin Bodi Chemical Co., Ltd.

[0050] Sodium silicate: analytically pure, molecular formula Na 2 SiO 3 ·9H 2 O, molecular weight 284.22, produced by Tianjin Bodi Chemical Co., Ltd.

[0051] 2.2 Pressing process

[0052] Medium density board density: 750kg / m 3 ;

[0053] Board specification: 50cm×50cm×1cm;

[0054] Sizing amount: 18%;

[0055] A

[0076] Example 3: Test of oxygen index and mechanical properties of flame-retardant fiberboard

[0077] 3.1 Main equipment

[0078] Precision circular saw machine, produced by Zhejiang Shunxin Machinery Co., Ltd.

[0079] JF-3 oxygen index tester, produced by Nanjing Jiangshi Analytical Instrument Factory.

[0080] Stopwatch, provided by the laboratory.