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Formaldehyde-free flame-retardant plate and production method thereof

A production method and technology of flame-retardant boards, applied in the field of boards, can solve the problems of low flame-retardant performance of boards, potential safety hazards, poor environmental protection performance, etc., and achieve the effects of high bonding strength, good mechanical strength and low cost

Inactive Publication Date: 2021-09-03
山东千森木业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If conventional wood adhesives are used for straw-based boards, the strength is not high and the environmental protection performance is poor, and there are disadvantages such as brittle board texture and insufficient toughness.
In addition, the flame retardancy of the boards prepared from agricultural and forestry processing residues is low, and there are potential safety hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 A kind of production method of formaldehyde-free flame retardant board, comprises the following steps:

[0020] (1) Weeds and crop stalks are crushed, screened, dried, and mixed at a ratio of 0.5:1;

[0021] (2) Preparation of dialdehyde starch by solid-phase activation: Add starch and sodium periodate of 1.0% starch quality to a ball mill for ball milling, the amount of zirconium balls is 1 time of the starch volume, and 10% starch quality magnesium salt is added in the ball milling process , the temperature of ball milling is 20°C, the rotating speed is 200r / min, and the time is 10min, and dialdehyde starch is obtained after ball milling is completed;

[0022] (3) Preparation of dialdehyde starch adhesive: dissolve dialdehyde starch in water with 1 times the weight of dialdehyde starch, add dropwise sodium hydroxide solution to adjust the pH value to 8, add urea with 0.03 times the weight of dialdehyde starch, Stir at 200rpm for 10min for addition reacti...

Embodiment 2

[0026] Embodiment 2 A kind of production method of formaldehyde-free flame retardant board, comprises the following steps:

[0027] (1) Weeds and crop stalks are crushed, screened, dried, and mixed at a ratio of 0.5:1;

[0028] (2) Preparation of dialdehyde starch by solid-phase activation: starch and sodium periodate of 1.0% starch quality are added in a ball mill for ball milling, the amount of zirconium balls is 2 times of the starch volume, and magnesium salt of 10% starch quality is added in the ball milling process , the temperature of ball milling is 50°C, the rotating speed is 400r / min, and the time is 20min, and dialdehyde starch is obtained after ball milling is completed;

[0029] (3) Preparation of dialdehyde starch adhesive: Dissolve dialdehyde starch in water with 2 times the quality of dialdehyde starch, add dropwise sodium hydroxide solution to adjust the pH value to 9, add urea with 0.05 times the quality of dialdehyde starch, Stir at 300rpm for 20min for add...

Embodiment 3

[0033] Embodiment 3 A kind of production method of formaldehyde-free flame retardant board, comprises the following steps:

[0034] (1) Weeds and crop stalks are crushed, screened, dried, and mixed at a ratio of 0.5:1;

[0035] (2) Preparation of dialdehyde starch by solid-phase activation: starch and sodium periodate of 1.0% starch quality are added in a ball mill for ball milling, the amount of zirconium balls is 3 times of the starch volume, and magnesium salt of 10% starch quality is added in the ball milling process , the temperature of ball milling is 80°C, the rotating speed is 600r / min, and the time is 30min, and dialdehyde starch is obtained after ball milling is completed;

[0036] (3) Preparation of dialdehyde starch adhesive: Dissolve dialdehyde starch in water with 3 times the quality of dialdehyde starch, add dropwise sodium hydroxide solution to adjust the pH value to 10, add urea with 0.08 times the quality of dialdehyde starch, Stir at 500rpm for 30min for ad...

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PUM

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Abstract

The invention relates to a formaldehyde-free flame-retardant plate and a production method thereof. The production method comprises the following steps: firstly, crushing, screening, drying and mixing weeds and crop straws; adding starch and sodium periodate into a ball mill for ball milling, and adding magnesium salt in the ball milling process to obtain dialdehyde starch after the ball milling is completed; dissolving dialdehyde starch in water, dropwise adding a sodium hydroxide solution, adding urea, stirring for addition reaction, dropwise adding a hydrochloric acid solution to adjust the pH value, adding urea, and performing stirring and condensation reaction to obtain a dialdehyde starch adhesive; dissolving forage in the dialdehyde starch adhesive, adding paraffin, a flame retardant and a dye, and uniformly stirring to form a mixed solution; and drying the mixed solution in a drying oven, taking out the mixed material, placing the mixed material in a mold, and carrying out hot press molding in a press vulcanizer to obtain the formaldehyde-free flame-retardant plate. The formaldehyde-free flame-retardant plate has the advantages of low production cost, simple process, high adhesive strength, high solid content, low viscosity, environmental protection and safety.

Description

technical field [0001] The invention relates to the technical field of boards, in particular to a formaldehyde-free flame-retardant board and a production method thereof. Background technique [0002] The current wood board market mainly includes plywood, ecological board, multi-layer board, particle board and density board. Although these boards are all artificial non-natural wood boards, they have essential differences in structure, especially plywood Ecological boards and multi-layer boards are made of stacked or thick or thin solid wood boards, while density boards are made of wood fibers or other plant fibers, prepared from fibers, and applied synthetically. Resin, under the condition of heat and pressure, is pressed into a plate, which is essentially different from it in structure. Relatively speaking, particle board and density board have a slight similarity in structure, that is, neither is pressed from a block of wood, where particle board is made of wood or other ...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L3/04C08L91/06
CPCC08L97/02C08L2205/025C08L2205/035C08L2201/02C08L3/04C08L91/06
Inventor 郭永胜
Owner 山东千森木业集团有限公司