How to use glueless glue

The curing principle of the shadowless glue is UV (photoinitiator in the curing material generates reactive free radicals or cations after absorbing ultraviolet light under the irradiation of ultraviolet rays, initiates monomer polymerization, cross-linking and bridging chemical reactions, and makes the adhesive in several seconds The clock is transformed from a liquid state to a solid state. Then, how can the use of shadowless glue be used? Let's learn how to use shadowless glue right away.

[How to Use Shadowless Glue]
1. One of the two objects to be bonded is transparent and the surface is clean, dry and free of grease;
2. Apply UV shadowless glue on one of the surfaces and close the two planes. Use a UV lamp with a suitable wavelength (usually 365nm-400nm) and energy or a high-pressure mercury lamp for lighting. Light from the center to the periphery. , and confirm that the light can really penetrate to the bonding site;
3. It is recommended to remove the remaining glue on the workpiece and re-illuminate it until it is completely cured.
4, the curing time should be based on different preparation materials, plastic thickness, UV intensity and different. It is recommended that users purchase an ultraviolet intensity tester and test the light intensity before bonding to reduce the reject rate.
5, the temperature of the glue has a little effect on the activity, when the temperature is low, the curing time should be appropriately extended;
6, do not use force to squeeze and repeatedly rub the material to be bonded, and recommend the use of fixed tools;
7. When plastics are glued, the content of UV absorbers in plastics should be taken into consideration. High levels of content will seriously affect the transmittance of UV light, which will also have a significant impact on the curing efficiency of the glue and even lead to the failure of the glue to cure.
8. It is recommended to use low viscosity products when bonding large areas. When conditions are available, it is advisable to purchase vacuum equipment and stick it in a vacuum environment in order to remove air bubbles and increase the yield;
9, the above instructions are for reference only, the specific operation requires the customer to make appropriate adjustments according to specific circumstances.

【No shadow adhesive curing speed】
The curing speed of the adhesives, especially the positioning speed, has always been a data that consumers care about. There are many aspects to measure the quality of adhesives: location time, depth of cure, strength, and flexibility of the film are all aspects of assessing the quality of adhesives. We believe that the faster the positioning speed, the greater the internal stress generated when the glue cures. This may cause the aluminum plate to fall off. The general positioning speed is preferably 6 to 10 seconds. Therefore, judging the quality of the shadowless glue alone is not correct.
Is it better to apply more glue when bonding?
In the case of adhesives, no more sizing is better. Experiments show that the thinner the adhesive layer, the higher the strength. In general, the thickness of the film does not exceed 0.2 μm.
【Whitening phenomenon without shadow glue】

The phenomenon of whitening of shadowless glue is a universal problem, but because the whitening phenomenon is not serious and the film is thin, it is generally difficult to find. Glassless sticky metal glues on the market have more or less this problem. Take a glass plate, place the glue on it, and then light it for 12 minutes. Take out the observation. This can quickly detect the whitening of the shadowless glue. The degree of whitening is directly related to the thickness of the film. The extent of glue whitening is not related to the intensity!
Xiao Bian concludes: The use method of the shadowless glue is introduced here for everyone, because the shadowless glue has a certain irritancy, it is recommended that the operator must wear protective clothing, glasses, masks, gloves or fingertips.

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