General Knowledge of Industrial Adhesives - How to...
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How to remove a fixed device that is "permanently" locked by thread locking adhesive?
It is necessary to heat it. When the heating temperature exceeds 230°C, it can be separated. Do not use hand tools to remove the fixed device.
Can the adhesive bond my workpieces for 5, 10, or 20 years?
Testing the durability of the adhesive is a difficult task. Certain methods are helpful for testing the service life of the adhesive, thereby determining the actual time that the workpieces can be bonded, such as high temperature, aging, and high humidity. The most accurate method to determine the bonding time of the workpieces is to let the workpieces age for a certain period of time. The best way to estimate the bonding time is to compare the new product with a product whose service life and performance ratio in the aging test are already known, so as to evaluate the bonding life of the new product. The longer the bonding life required for the product, the more important the aging test of the product will be.
How to deal with the water vapor and odor emitted by the instant adhesive?
The water vapor and odor emitted by the instant adhesive are irritating, and workers should not be exposed to them for a long time. Generally, the "low-volatile" or "low-blooming" type can control this irritating odor. It is necessary to install good ventilation facilities and let the workers wear masks.
When using the instant adhesive, a white mist is found in the bonding area. Is it harmful? How to eliminate it?
This phenomenon is commonly referred to as "blooming" or "frosting", which occurs during the curing process of the instant adhesive. Blooming usually appears in summer when the humidity is the highest, and it can also occur when an excessive amount of accelerator is used, causing a strong curing reaction. In some cases, if the user assembles the product in an enclosed area before it is completely cured, it will prevent the water vapor from volatilizing.
The catalyst has crystallized due to the cold temperature. How can I use it?
Heat it to 45-65°C until all the catalyst is dissolved, mix it evenly, and cool it to 35°C before use.
How to select the appropriate conformal coating material?
The following factors should be mainly considered:
A. The protection performance and reliability of the circuit board and components in harsh environments, such as the temperature range, pressure resistance, etc.;
B. The gluing equipment and the volume of the board surface to be coated;
C. Environmental and worker safety factors;
D. Cost and configuration;
E. Repair indicators.
How many gluing methods are there for conformal coating materials?
The four most commonly used methods are spraying, dipping, brushing, and flow coating (pouring).
How long does it take for the anaerobic adhesive to cure?
As the name implies, the anaerobic adhesive undergoes a chemical reaction only when it is out of contact with air. Generally, the curing time is a few minutes to more than ten minutes, and the curing rate varies due to different materials and primers. Heating can accelerate the curing speed.
Why is the anaerobic adhesive only filled half a bottle?
To prevent the anaerobic adhesive from solidifying due to lack of oxygen.
Do I need to use a primer to cure the anaerobic adhesive?
A primer is not required for most metal surfaces. A primer is recommended for use on non-metal surfaces with anaerobic adhesive to accelerate the curing.
How long do I need to wait for the bonded parts to function?
It depends on the adhesive and the substrate. It takes 15-20 minutes to cure the thread locking adhesive, and it can resist vibration for one hour. The instant adhesive usually only takes a few seconds.
When should I use a primer or a surface accelerator?
When dealing with substrates with low surface energy activity, such as plastics, it is usually required to enhance the adhesion to achieve sufficient bonding strength. The selection of the primer type depends on the specific application.
Does the primer need to be applied on both sides?
In most cases, it only needs to be applied on the side with poor adhesion. If a very fast curing time is required or the gap in the bonding area is larger than 0.15, it is usually necessary to apply the primer on both sides. When using the primer, it is better to use a small amount.
