10 Questions and Answers about Adhesives

Ten Questions and Answers about Adhesives

 

1

Q: How do I remove a fixture that is “permanently” locked with thread lock adhesive?

A: It must be heated to a temperature above 32 5℉ (about 162.5℃) to separate it. Never use hand tools to remove the fixture.

2

Q: Will the adhesive hold my workpiece together for 20 years?

A: Testing the durability of adhesives is a difficult matter. Certain methods help test the service life of adhesives to determine the actual time that the workpieces can be bonded, such as high temperature, aging and high humidity. The most accurate way to determine the bonding time of 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 aging tests are known, so as to evaluate the bonding life of the new product. The longer the product's bonding life is required, the more important it is to test the aging of the product.

 

3

Q: How to deal with the water vapor and odor emitted by quick-drying glue?

A: The water vapor and odor emitted by quick-drying glue are irritating, so workers should not be exposed to them for a long time. Usually, "low volatility" or "low whitening" can control this irritating odor. It is necessary to provide good ventilation facilities and let workers wear masks.

 

4

Q: When using quick-drying glue, I found a white mist on the bonding area. Is it harmful? How can I eliminate it?

A: This phenomenon is commonly referred to as "blooming" or "frosting" and occurs during the curing process with quick-drying adhesives. Blossoming usually occurs during the summer when humidity is highest. It can also cause a strong curing reaction when excessive amounts of accelerators are used. In some cases, users do not fully cure the product before assembly in an enclosed area to prevent water vapor from evaporating.

 

5

Q: If cold temperatures crystallize the catalyst, how do I use it?

A: Heat it to 45-65℃ until the catalyst is dissolved, heat it to 45-65℃ until the catalyst is dissolved, mix well and cool it to 35℃ before use. 

 

6

Q: How to choose the right conformal coating material?

A: Heat it to 45-65℃ until the catalyst is dissolved. The following factors should be considered: the protection and reliability of the board and components in harsh environments, such as temperature range, pressure resistance, etc.; the equipment for sizing and the volume of the board to be coated; environmental and worker safety factors; compliance with the listed certifications or military standards; cost and configuration; and repair indicators.

 

7

Q: Will refrigeration extend the shelf life of the adhesive?

A: Before the instant adhesive is opened, refrigeration can extend its shelf life. Refrigeration is not effective in extending the shelf life of anaerobic adhesives. Please refer to the storage conditions on the product packaging label for specific conditions.

 

8

Q: How long does it take for anaerobic adhesive to cure?

A: As the name implies, anaerobic adhesives react chemically only when they are not exposed to air. The general curing time is from a few minutes to more than ten minutes. The curing rate varies depending on the material and primer. Heating can accelerate the curing speed.

 

9

Q: What preparation do I need to do on the surface before applying adhesive?

A: If there is a small amount of oil on the surface, thread lockers and sealants can be used without surface preparation. Thick grease films and contaminants must be removed for adequate bonding. For construction adhesives and instant adhesives, testing must be performed to determine the acceptance of the machined surface. Generally speaking, the end user should try the least complex machined surface.

 

10

Q: How to speed up the curing of silicone RTV sealant?

A: The curing speed of room temperature curing adhesives depends on the changes in room temperature and humidity. The higher the temperature and the greater the humidity, the faster the curing speed. Curing proceeds from the surface to the inside. In about 24 hours, a 1/8' thick section will become a rubber solid. The thicker the sealing part, the longer the curing time. Appropriate heating can shorten the curing time.


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Post time: 2024-06-07 16:18:52
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