Lab Testing

Test types & methods

  • What: Measuring the “quick stick” or instantaneous tack of a pressure sensitive adhesive tape. How: The tape is brought into contact with a standard polyester surface over a 25mm² area, and then removed at a specified speed.  The force is expressed in Newton [N] per 25mm² [area of tape].

  • What: Measuring the peel adhesion of a pressure sensitive tape. How: The tape is peeled from a standard test panel at a specified angle and speed.  The force is expressed in Newton [N] per 25mm [width of tape].

  • What: Measuring the weight of adhesive on a specified area of substrate. How: Samples are cut from the tape and weighed on highly sensitive scales. The measurement is expressed in grams per square meter [g/m²].

  • What: Determining the load-bearing capability of a pressure sensitive tape in a specific condition / temperature. How: The temperatures can either be set at 23 ±2°C or 70 ±2°C and at 50 ±5%.  The measurement is the time required for the bond area to fail and is expressed in minutes.

  • What: Determining the highest temperature load-bearing capability of a pressure sensitive tape. How: Measured by raising the temperature in specified increments until failure occurs. The measurement is the failure temperature at which the bond area fails, and is expressed in degrees Celsius.

  • What: Determining the force required to separate the release liner from a pressure sensitive tape. How: Release liner is removed at a specified angle and speed.  The force is expressed in Newton [N] per 50mm [width of tape].

  • What: Measuring the amount of residual solvent that remains in a coated film of pressure sensitive adhesive. How:  Via heat? The retained solvent is expressed as a percentage of the overall weight of the adhesive sample.

  • What: Measuring the loss of moisture vapour through the test substrate (also known as the permeability of the material) How: Loss is measured after the test sample has been kept for over 24 hours at 37°C.  The moisture vapour loss is expressed in grams [g] per square meter [m²] per 24 hours. There are two versions of this test: The first method is the standard upright cup MVTR which evaluates specifically the MVTR of a wound dressing when it is in contact with water vapour. The second is the inverted cup MVTR which measures specifically the MVTR of a material when it is in contact with a liquid.

  • What: Measuring the film shrinkage of a coated product due to the tensions exerted on it during the coating process.

  • What: Measuring the amount of curl that is present within a product. How: The curl is expressed in millimetres [mm].

  • What: This method is used to artificially accelerate the age of a testing sample and will relate to the ‘shelf life’ of the laminate prior to its use.

  • What: Determining the force required to separate the release liner from a pressure sensitive tape at a specified angle and speed. How: The force is expressed in Newton [N] per 50mm [width of tape].

  • What: Measuring the interface adhesion of a surface to determine its suitability to accept good adhesive adhesion using dyne inks.

  • What: The penetration measurement is the depths in tenths of millimetres to which a standard penetrant such as a cone or a needle sinks into a semi-solid substance under defined conditions of sample size, penetrant weight, geometry, and time. The softer the sample is then the deeper the penetrant will sink into the sample and thus the higher the penetration number will be.

OUR CONTACTS

Julian Watkins | Business Development Manager

Raleigh Hall Industrial Estate, Eccleshall,
Staffordshire, ST21 6JL, England

+44 (0) 1785 850 357
+44 (0) 7738 217984
sales@raleighcoatings.com