white plastic bottles and wooden spoons

There are many different types of adhesives, and they are all supposed to stick very well. But how strong are they really? Professionals use apparatus which clamps test strips that have been glued together and slowly pulls them apart. A machine then measures the force needed to tear the glue joint apart. This measuring principle can be reproduced by hanging progressively heavier weights on a glued test strip until the glue joint tears. 

You will need

  • Strong paper (e.g. folder dividers) for test strips or smaller wooden sticks
  • Glue
  • Duct tape for reinforcement
  • Hooks
  • Cord 
  • Empty PET bottles as weights
  • Construction materials for frame (or broomstick placed over 2 chairs)
  • Scissors

Let’s get started!

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