A rolling ball tack tester is a specially designed machine for assessing the tackiness of PSAs such as adhesives found in adhesive tapes, labels, films, and medical bandages.
This apparatus measures the initial tack (the stickiness that develops at the point of contact) of the adhesive when it comes into contact with another material without any pressure being applied.
How it works
Operating Principle
The principal rolling ball tack test method includes the following standard procedure:
- Generation of Kinetic Energy: The steel ball is allowed to roll down from the highest point of the inclined plane that has a groove for the steel ball. The ball gains its maximum speed when it reaches the lowest point on the inclined plane.
- Resistance of Adhesion: At the contact point, which is the end of the ramp, the ball lands on a horizontal test base on which the adhesive sample is mounted sticky-side up.
- The Stopping Distance: While rolling along the adhesive-coated surface, friction occurs between the ball and the adhesive until the former stops completely.
How to Conduct the Test
- Preparation: Ensure that the inclined ramp and the industrial tack tester ball are properly cleaned before proceeding using a solvent such as Ethyl Acetate or Isopropyl Alcohol.
- Verify that the apparatus is well levelled using the built-in 3-axis spirit level to prevent the ball from going off track.
- Specimen Mounting: The adhesive tape or film is placed on a flat glass surface parallel to the track. Ensure that the adhesive side is facing upwards while pressing the two ends tightly.
- The Roll: The ball can be placed on the starting mechanism using the tweezers or the lint-free stick. Let go of the spring lever.
- Data collection: The distances will be measured using an engineer’s square and the built-in scale when the ball comes to a halt. The distance should be taken from where the ball touched the ground and measured to the middle of the stationary ball.
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Q : What is a Rolling Ball Tack Tester?
A : The Rolling Ball Tack Tester is a specific piece of equipment used in a laboratory that measures the initial tack or the instantaneous adhesion of pressure-sensitive adhesives (PSAs). Pressure-sensitive adhesives (PSAs) are utilized in adhesive tapes, stickers, and protective films.
Q : Which industries use Rolling Ball Tack Testers?
A : Industries that use the rolling ball tack tester are Tape manufacturers, Label converters, Surgical tape manufacturers, Wearable medical device industries, and electronics and semiconductor industries.
Q : What materials can be tested using a Rolling Ball Tack Tester?
A : The rolling ball tack tester can be used for testing different types of adhesive tapes, product labels, surgical tapes, transdermal patches, protective films, and filters.
Q : What standards are followed in Rolling Ball Tack Testing?
A : Some international standards are followed in a rolling ball tack tester, which include ASTM D3121, PSTC6, GB/T 4852, and JIS Z0237.
Q : Why is tack testing important?
A : It should be understood that tack testing is a crucial test because it assesses the “first impression” made by the adhesive. As opposed to peel and shear tests, which measure the durability and resistance to loads of a tape after application, the tack test measures how fast the tape bonds with the surface.
