Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for measuring the open time of formaldehyde-free adhesive

A technology of formaldehyde-free adhesives and open time, applied in the field of adhesives, can solve problems that have not been paid attention to, and achieve the effect of improving product quality

Active Publication Date: 2020-09-18
东营市盛基环保工程有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, when the performance of the adhesive is measured, the glue strength, pot life and other indicators are generally measured, and no attention is paid to the opening time of the adhesive when preparing plywood and blockboard.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for measuring the open time of formaldehyde-free adhesive
  • A method for measuring the open time of formaldehyde-free adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Under the conditions of an ambient temperature of 25°C and a humidity of 40%, a 5-layer model of 30 cm×30 cm was made from eucalyptus veneer with a thickness of 1.7 mm and a moisture content of 10%. YJ-2132 formaldehyde-free adhesive produced for Dongying Shengji Environmental Protection Engineering Co., Ltd., with a coating amount of 160 g / m 2 , for gluing and assembling, after assembling, use 0.05 kg / cm 2 The weight is flattened and pressed (principle: the billet is generally 1-1.2 meters high and weighs about 500 kg / m in conventional billet assembly 2 ), and then according to 15min, 25min, 35min, 45min, 55min, 65min, etc., send a part of the billet for pre-pressing at intervals of 10 minutes (pre-pressing pressure 8kg / cm 2 , time 30 min); the pre-pressed plate after pre-pressing is hot-pressed every 30 min (the time for core repair after pre-pressing in conventional production) (hot-pressing temperature 105°C±5°C, pressure 9 kg / cm 2 , time 9 minutes); After the hot...

Embodiment 2

[0044]Under the conditions of an ambient temperature of 25°C and a humidity of 40%, a 9-layer model of 30 cm×30 cm was made from eucalyptus rotary-cut veneer with a thickness of 1.5 mm and a moisture content of 10%. Produced YJ-2133 formaldehyde-free adhesive for Dongying Shengji Environmental Protection Engineering Co., Ltd., with a coating amount of 150 g / m 2 , for gluing and assembling, after assembling, use 0.08 kg / cm 2 The heavy objects should be flattened and pressed, and then according to 15 minutes, 35 minutes, 55 minutes, 75 minutes, 95 minutes, 115 minutes, etc., send a part of the blanks for pre-pressing at intervals of 20 minutes (pre-pressing pressure 9 kg / cm 2 , time 20 min); after the pre-pressing is completed, the billet is hot-pressed every 30 min (the time for core repair after pre-pressing in conventional production) (hot-pressing temperature 105°C±5°C, pressure 9kg / cm 2 , time 15min); after the completion of the hot-pressing, the sample was cured for 72 ho...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for measuring the open time of the formaldehyde-free adhesive. The method for measuring the opening time of the formaldehyde-free adhesive comprises the following steps: 1) Embryo formation after the veneer is glued; 2) Embryo formation composite board is covered and pressed; 3) The laminated board is pre-pressed; 4) After the pre-pressing is completed, hot-press the pre-pressed board at an interval of 30 minutes; 5) saw the sample after 72 hours of curing, and test the bonding strength of the sawed sample; 6) The bonding strength of the sample is not lower than that of the fast operation 70% of the benchmark bonding strength, and 90% of the test pieces are not lower than the corresponding material strength in GB / T 9846-2015, which is the open time of the formaldehyde-free adhesive. The method for measuring the open time of the formaldehyde-free adhesive provided by the invention can effectively determine the performance of the adhesive, so that the composite board can be produced qualifiedly according to the performance of the adhesive in the actual production process.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a method for measuring the open time of formaldehyde-free adhesives. Background technique [0002] With the improvement of people's living standards, home decoration has become a necessity. In the wood product processing industry, the production of plywood and blockboard solves the problem of utilization of forestry residues. Because of their uniform color, compact structure, suitable hardness, and no natural defects, they are widely used in construction and decoration. , furniture manufacturing, transportation and other industries. In the production of plywood and blockboard, urea-formaldehyde resin with formaldehyde as the main component is mostly used as an adhesive for gluing. The residual and unreacted formaldehyde in the board will be gradually released to the surrounding environment, forming the main source of formaldehyde pollution. [0003] With the increasing aware...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/08G01N19/04G01N1/28
CPCB27D1/08G01N1/28G01N1/286G01N19/04
Inventor 杨奠基石延芳
Owner 东营市盛基环保工程有限公司