EN 1945:1996

Overview

EN 1945:1996 (adopted in national versions such as SIST EN 1945:1997) is a CEN standard that specifies a laboratory method to measure the quick stick (initial tack) of self-adhesive tapes. The test evaluates the tape’s ability to adhere to a substrate when only a very light pressure is applied, characterizing the instantaneous grip or tack that users experience at first contact.

Key Topics

• Scope and purpose: Defines the objective of measuring initial adhesion rather than long-term peel or shear performance.
• Test principle: A controlled procedure to quantify how readily a tape adheres under very light pressure (commonly referred to as quick stick or initial tack).
• Specimen handling: Requirements for sample preparation and conditioning (ambient conditions, surface cleanliness) to ensure reproducible results.
• Substrate and surface: Specification of the test surface or substrate type to reflect intended application or to provide standardized comparison.
• Test equipment and procedure: Use of an appropriate quick-stick tester or equivalent apparatus to apply tape with minimal pressure and record adhesion performance.
• Reporting: Clear reporting of test conditions, results, and any deviations so results are comparable across labs.
• Limitations: Emphasizes that the method measures initial adhesion only and does not substitute for peel, shear or ageing tests.

Applications

• Material selection and formulation: Compare tack levels of different adhesive chemistries and backing materials to optimize product feel and performance.
• Product development: Rapid screening of prototype tapes for desired instant adhesion properties.
• Quality control: Routine batch inspection to ensure consistent initial tack across production runs.
• Supplier comparison and procurement: Objective data to select tapes with the required quick-stick behavior for a given application.
• Performance specification: Inclusion in technical datasheets and tender documents when initial grab is a critical requirement.

Who Uses This Standard

• Tape manufacturers (R&D and QC laboratories)
• Independent testing laboratories and certification bodies
• OEMs and specifiers in industries such as packaging, automotive, electronics assembly, construction, and medical devices
• Procurement teams and quality engineers evaluating adhesive products

Related Standards

• Other CEN/ISO test methods for adhesive tapes (peel, shear, tack-related tests) - useful to consider alongside EN 1945 when a full adhesion profile (initial tack plus long-term adhesion) is required.

Keywords: EN 1945:1996, self-adhesive tapes, quick stick, initial tack, adhesive tape testing, CEN standard, quick-stick measurement.