Formaldehyde-free adhesive for furniture as well as preparation method thereof

A technology of adhesives and formaldehyde, which is applied in the field of formaldehyde-free adhesives for furniture and its preparation, can solve the problems of formaldehyde volatilization, health damage of residents, and exceeding standards, and achieve the effect of enhancing strength

Inactive Publication Date: 2018-05-18
王静龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of "trialdehyde glue" to prepare plywood will release formaldehyde during production and use. The release period of formaldehyde in plywood can be as long as 3 to 15 years, resulting in long-term indoor air formaldehyde in newly built houses. harm
Many manufacturers use formaldehyde masking, adsorption, sealing and other means to make the release of formaldehyde reach the standard of E2 (≤5.0mg / L), E1 (≤1.5mg / L) or barely reach E0 (≤0.5mg / L) Grade standard, but when the conditions are met, this part of formaldehyde will still volatilize

Method used

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  • Formaldehyde-free adhesive for furniture as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A formaldehyde-free adhesive for furniture, comprising the following components by weight percentage:

[0027] Cornstarch 25%

[0028] Acid Alpha-Amylase 3%

[0029] Guar Gum 4%

[0030] Diatomaceous earth 6%

[0031] Bamboo fiber 0.7%

[0032] Corning Hydropalat 875 0.2%

[0033] Beta-cyclodextrin 7%

[0034] water balance.

[0035] A preparation method of formaldehyde-free adhesive for furniture, comprising the following steps:

[0036] A. First adjust the starch with water to a solution with a concentration of 40%, ultrasonically treat it at 65°C for 17min, the ultrasonic frequency is 25kHz, the ultrasonic power is 125w, and filter;

[0037] B. Add acid α-amylase and adjust the pH value to 4.0-4.5, enzymolysis for 30 minutes;

[0038] C. Adjust the pH value to 7.0-7.5, add dispersant and β-cyclodextrin, and stir for 30 minutes;

[0039] D. Add the remaining raw materials and stir for 55 minutes.

Embodiment 2

[0041] A formaldehyde-free adhesive for furniture, comprising the following components by weight percentage:

[0042] Cornstarch 20%

[0043] Acid Alpha-Amylase 5%

[0044] Guar Gum 2%

[0045] Diatomaceous earth 8%

[0046] Bamboo fiber 0.5%

[0047] Corning Hydropalat 875 0.3%

[0048] Beta-Cyclodextrin 10%

[0049] water balance.

[0050] A preparation method of formaldehyde-free adhesive for furniture, comprising the following steps:

[0051] A. First adjust the starch water to a solution with a concentration of 35%, ultrasonically treat it at 70°C for 15min, the ultrasonic frequency is 30kHz, the ultrasonic power is 120w, and filter;

[0052] B. Add acid α-amylase and adjust the pH value to 4.0-4.5, enzymatic hydrolysis for 35 minutes;

[0053] C. Adjust the pH value to 7.0-7.5, add dispersant and β-cyclodextrin, and stir for 15 minutes;

[0054] D. Add the remaining raw materials and stir for 60 minutes.

Embodiment 3

[0056] A formaldehyde-free adhesive for furniture, comprising the following components by weight percentage:

[0057] Cornstarch 30%

[0058] Acid Alpha-Amylase 2%

[0059] Guar Gum 5%

[0060] Diatomaceous earth 3%

[0061] Bamboo fiber 1%

[0062] Corning Hydropalat 875 0.1%

[0063] Beta-Cyclodextrin 3%

[0064] water balance.

[0065] A preparation method of formaldehyde-free adhesive for furniture, comprising the following steps:

[0066] A. First adjust the starch water to a solution with a concentration of 45%, ultrasonically treat it at 60°C for 20 minutes, the ultrasonic frequency is 20kHz, and the ultrasonic power is 150w, and filter;

[0067] B. Add acid α-amylase and adjust the pH value to 4.0-4.5, enzymolysis for 25 minutes;

[0068] C. Adjust the pH value to 7.0-7.5, add dispersant and β-cyclodextrin, and stir for 25 minutes;

[0069] D. Add the remaining raw materials and stir for 45 minutes.

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PUM

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Abstract

The invention provides formaldehyde-free adhesive for furniture. The formaldehyde-free adhesive for the furniture comprises the following raw materials: corn starch, amylase, guar gum, diatomite, bamboo fiber, beta-cyclodextrin and water. The adhesive does not contain formaldehyde and is harmless for a human body. The bamboo fiber and the beta-cyclodextrin are added, so that the effect of enhancing the strength of the adhesive is achieved; furthermore, the bamboo fiber has certain antibacterial, bacteriostatic and insect-preventing effects, so the prepared furniture has certain mildew-proof and moth-proof effects.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a formaldehyde-free adhesive for furniture and a preparation method thereof. Background technique [0002] The wood processing industry has a great demand for adhesives, and the annual consumption of adhesives accounts for about 60% of the total adhesive dosage. The wood adhesives on the market are mainly "trialdehyde glues" (urea-formaldehyde glue, phenolic glue, etc.) , Melamine-formaldehyde glue), especially urea-formaldehyde glue. Urea-formaldehyde resin has the characteristics of simple production process, low raw material price, high initial viscosity, high bonding strength, colorless and transparent, and does not pollute wood products. Its consumption once accounted for about 80% of the total glue consumption in the wood processing industry. However, the use of "trialdehyde glue" to prepare plywood will release formaldehyde during production and use. The release period of formald...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/02C09J105/00C09J105/16C09J11/04C09J11/08
CPCC08L2205/02C08L2205/035C08L2205/16C09J11/04C09J11/08C09J103/02C08L5/00C08L97/02C08L5/16C08K3/346C08K3/34
Inventor 王静龙
Owner 王静龙
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