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Formaldehyde-free membranous wood adhesive and preparation and using methods thereof

A wood adhesive, formaldehyde-free film technology, applied in chemical instruments and methods, film/flake adhesives, adhesives, etc., can solve the problems of stability, difficulty in promotion, complicated processes, etc., and reduce energy. , The effect of obvious economic benefit and simple process

Active Publication Date: 2015-01-07
FUZHOU HANYANG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the industry has also successively developed formaldehyde-free bio-protein glue, polyurethane glue, isocyanate and other glue types, but due to factors such as complex process, stability problems, and high prices, it is difficult to promote them.

Method used

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  • Formaldehyde-free membranous wood adhesive and preparation and using methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of formaldehyde-free film adhesive

[0022] Raw materials: polyethylene (PE) film, itaconic acid, acetone, chlorine

[0023] Operation steps: Take a certain amount of PE film (film thickness, for example, 2.5s), dilute itaconic acid with acetone to a concentration of 3% (weight percentage, the same below), and evenly spray the itaconic acid solution on the PE film; Stop for a while or dry at about 50°C; place the film in a 500ml quartz flask with a thermometer and a gas inlet and outlet, feed chlorine, and react under ultraviolet radiation. The reaction temperature is 50±3°C. After the reaction time was 30 minutes, the reaction was stopped, and the chlorine flow was stopped. The product is a film adhesive for wood-based panels without formaldehyde and other volatile organic toxic substances.

Embodiment 2

[0025] Preparation of formaldehyde-free film adhesive

[0026] Raw materials: polyethylene (PE) film (film thickness, eg 2.5s), maleic anhydride (MAH), water, chlorine

[0027] Operation steps: Take a certain amount of PE film, dilute maleic anhydride (MAH) with water to a concentration of 3%, spray the MAH aqueous solution evenly on the PE film; place the film on a 500ml quartz glass with a thermometer and gas inlet and outlet Chlorine was introduced into the flask, and the reaction was carried out under ultraviolet radiation. The reaction temperature is 50±3°C. After the reaction time was 30 minutes, the reaction was stopped, and the chlorine flow was stopped. The product is a film adhesive for wood-based panels without formaldehyde and other volatile organic toxic substances.

Embodiment 3

[0029] Gluing and strength of formaldehyde-free plywood

[0030] Raw materials: Eucalyptus gigantea veneer (3 pieces of 1.5mm×250mm×250mm), film adhesive

[0031] Operation steps: Take a veneer as the surface board, spread film adhesive on it, take another veneer as the core board, overlap the first veneer vertically according to the fiber direction, and spread the film again Shaped glue, take the third veneer according to its fiber direction perpendicular to the core board and overlap the loose side with the rubber side of the core board, the combination is completed, and then hot-pressed.

[0032] Hot pressing conditions: 160°C, 1.6-2.5MPa, 10min;

[0033] Cold pressing conditions: room temperature, contact pressure, 5min;

[0034] Then prepare samples according to GB / T9846.7-2004 standard

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Abstract

The invention discloses a formaldehyde-free membranous wood adhesive and a preparation method and using method thereof. According to the preparation method, surface grafting modification is carried out on a polymer resin membrane so as to graft various polar groups on a molecular chain, thus obtaining the formaldehyde-free membranous wood adhesive. The adhesive has the advantages of no formaldehyde pollution, simple process, high adhesive strength and the like, is easy to spread, easy to transport and store, and has remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the field of adhesives, and in particular relates to a formaldehyde-free film-like wood adhesive and a preparation and use method thereof. Background technique [0002] At present, the adhesive used for plywood in my country is basically a thermosetting resin synthesized from formaldehyde. Due to the presence of free formaldehyde in this resin, it is easy to release and escape during the production and use of plywood, pollute the environment, and cause harm to the human body. With the improvement of people's living standards and the enhancement of environmental protection awareness, people pay more and more attention to the impact of living environment on health. The problem of excessive free formaldehyde released in wood-based panels has become a "home decoration killer", and many people even "talk about aldehyde discoloration". Over the years, the industry has continued to tackle key problems, and has developed low-free form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/16C08J7/18C09J7/00C09J151/06C09J151/08B32B37/12B32B37/10B32B21/13
Inventor 赵季若冯莺杨学震赵季志赵同兴
Owner FUZHOU HANYANG ENVIRONMENTAL PROTECTION TECH CO LTD
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