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Preparing method of flame retardant plywood

A technology of plywood and flame retardant, which is used in the joining of wooden veneers, manufacturing tools, wood treatment, etc., can solve the problems of single, not achieving flame retardant effect, etc. tight and stable effect

Inactive Publication Date: 2018-05-04
黄桂凤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current flame retardants and flame retardant treatment methods are relatively simple and have not achieved a good flame retardant effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method for flame retardant plywood, comprising the following steps:

[0021] 1) Log processing: sawing off the logs, cooking and peeling them, and cutting the peeled wood segments into chips.

[0022] 2) Primary drying: put the ring-cut wood chips into the drying room, and control the temperature at 55°C for 23 hours.

[0023] 3) Impregnation treatment: the flame retardant is made into an impregnation solution with a solution concentration of 5%, and the once-dried veneer is immersed in the impregnation solution for 6 hours.

[0024] 4) Gluing: Coating adhesive on each layer of wood chips;

[0025] 5) Pre-pressing: Assemble the wood chips, and then put them into a hot press for pre-pressing. The pre-pressing temperature is 52°C, the pressure is 4.5 MPa, and the pre-pressing time is 1.8 hours to obtain a raw board;

[0026] 6) Trimming and hot pressing: cut the rough board into a standard board, and then hot press, the hot pressing temperature is 103°C, t...

Embodiment 2

[0033] A preparation method for flame retardant plywood, comprising the following steps:

[0034] 1) Log processing: sawing off the logs, cooking and peeling them, and cutting the peeled wood segments into chips.

[0035] 2) Drying: put the ring-cut wood chips into the drying room, and control the temperature at 63°C for 15.5 hours.

[0036] 3) Impregnation treatment: the flame retardant is made into an impregnation solution with a solution concentration of 8%, and the once-dried veneer is immersed in the impregnation solution for 4 hours.

[0037] 4) Gluing: Coating adhesive on each layer of wood chips.

[0038] 5) Pre-pressing: Assemble the wood chips, and then put them into a hot press for pre-pressing. The pre-pressing temperature is 71° C., the pressure is 8.1 MPa, and the pre-pressing time is 0.8 hours to obtain a raw board.

[0039] 6) Trimming and hot-pressing: cut the rough board into a standard board, and then hot-press at a temperature of 107° C., a pressure of 15...

Embodiment 3

[0046] A preparation method for flame retardant plywood, comprising the following steps:

[0047] 1) Log processing: sawing off the logs, cooking and peeling them, and cutting the peeled wood segments into chips.

[0048] 2) Drying: Put the ring-cut wood chips into the drying room, and control the temperature at 80°C for 12 hours.

[0049] 3) Impregnation treatment: the flame retardant is made into an impregnation solution with a solution concentration of 10%, and the once-dried veneer is immersed in the impregnation solution for 3 hours.

[0050] 4) Gluing: Coating adhesive on each layer of wood chips.

[0051] 5) Pre-pressing: Assemble the wood chips, and then put them into a hot press for pre-pressing. The pre-pressing temperature is 75° C., the pressure is 10 MPa, and the pre-pressing time is 0.5 hours to obtain a raw board.

[0052] 6) Trimming and hot-pressing: cut the raw board into standard boards, and then hot-press. The hot-pressing temperature is 110° C., the pres...

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PUM

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Abstract

The invention discloses a preparing method of flame retardant plywood. The method comprises the steps of log machining, primary drying, immersion treatment, secondary drying, gluing, pre-pressing, hotpressing and edge cutting and sanding; according to immersion treatment, a fire retardant is prepared into an immersion solution, the solution concentration ranges from 5 to 10%, a single board obtained after primary drying is immersed in the immersion solution to be immersed, the immersion time ranges from 3 hours to 6 hours, and the fire retardant comprises, by weight part, 30 to 40 parts of phosphoric acid, 10 to 20 parts of ammonium dihydrogen phosphate, 8 to 15 parts of squinamide phosphate, 10 to 20 parts of melamine phosphate, 10 to 20 parts of aluminum dihydrogen phosphate, 3 to 5 parts of phosphorus-contained polysiloxane and 2 to 4 parts of methyl phenyl silicone resin. When the fire retardant is heated, phosphorus and silicon synergistic effect is generated, the stable carbon layer is formed in the system, the residual carbon amount reaches above 60%, heat stability is good, heat isolation, oxygen isolation and smoke restraining are generated, and the molten drop preventionaim is achieved.

Description

technical field [0001] The invention relates to the technical field of plywood production, in particular to a method for preparing flame-retardant plywood. Background technique [0002] my country's plywood industry is developing rapidly, and it is widely used in construction, decoration, packaging and other fields. The flame-retardant board is a three-layer or multi-layer plywood made of logs that are cut into wood chips or sliced ​​into small wooden squares. The wood chips are flame-retardant treated and then glued with adhesives. The fiber directions of adjacent layers of wood chips are glued perpendicularly to each other. Because the treatment process of flame-retardant plywood is to carry out flame-retardant treatment on the veneer and then glue the subsequent section, in the flame-retardant treatment, the wood board is usually dipped in the flame retardant to improve the flame-retardant performance of the plywood . The current flame retardants and flame retardant tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04
CPCB27D1/04B27K2240/30
Inventor 黄桂凤
Owner 黄桂凤
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