Adhesion peel strength of COVID-19 tapes and stickers

In the wake of the Covid-19 lockdown, there have been clear guidelines issued to businesses on keeping staff and customers safe. These include wall signs encouraging people to follow hygiene guidelines through to purpose-made floor tape to help enforce social distancing rules.

For successful long-lasting application to surfaces, they all rely on the stickiness provided by the humble self-adhesive.

Safety Distancing Tape, for example, comes on rolls and is easily cut to the required length. The self-adhesive backing allows for easy fitting and damage-free removal. As with most common pressure sensitive adhesive (PSA) tapes there is a composite consisting of a stiff backing layer (eg PVC,vinyl) and a soft adhesive layer. The adhesives used are typically thermoplastic – they soften when heated and become more brittle when cooled.

Floor tapes may be scuff- and break-resistant but can have drawbacks of tearing, peeling or failing to adhere to some surfaces thus creating trip hazards. Testing the adhesive strength characteristics of tapes and signs is an important factor in quality control assessment.

Mecmesin's Solution

ISO 29862, ISO 29862, AFERA 5001 and ASTM D3330 test standards both describe methods for determining the peel adhesion properties of self-adhesive tapes. They allow manufacturers and users of tapes to assess the uniformity of the adhesion within a single roll of tape, between different rolls or between production batches.

A sample of tape is kept in standard conditions for temperature and humidity and then cut to a specified width and length. The tape is then applied to a test panel in a uniform manner by using a roller of a fixed weight. This ensures that there is minimum variation in the test pieces.

The tape is then held in dedicated peel jigs which are attached to a tensile testing machine. The tensile tester moves at a constant rate of extension (CRE) to gradually separate the adhesive from the tape whilst the tester software calculates the bond strength and peel adhesion characteristics. The angle of peel and test plate are determined by the test method.

  • Method 1 - 90°and 180° peel adhesion of tape from a stainless steel plate
  • Method 2 - 90°and 180° peel adhesion of tape from its own backing
  • Method 3 - 90°and 180° peel adhesion of double-sided and transfer tapes
  • Method 4 - 90°and 180° peel adhesion of tape from its liner

Test equipment

Mecmesin peel testers are ideally suited to perform these tests. They can be easily configured to fit the appropriate peel jig and the software is simple to use even for unskilled operators. Test reports including peel adhesion graphs are available in standard templates or you can customize them to your exact requirements.

MultiTest 2.5-i software-driven peel tester
FPT (Friction Peel Tear) horizontal peel tester
90 degree and 180 degree Peel Jigs

See also

Cosmetic packaging pull-off test

A bench-top testing system was required to repeatably test the pull-off force on a variety of cosmetic containers. The system needed to allow a relatively high volume of containers to be tested with the minimum level of training required for users. Mecmesin's solution avoided the risk of damaging the loadcell by excessive torque on tightening the collet grip, and the lipstick barrel was first inserted in the grip and then connected to the gauge by a flexible chain-link.

Food packaging made from thermoformed plastics and intended for freezing, requires testing to ensure optimum functionality when closing and sealing the container. The closing effort of the lid is measured by using a motorised force tester controlled by software together with a custom-designed fixture to hold standard-sized ice cream tubs. In addition the ‘top-load’ crush strength of the container itself can also be tested on the same machine to guarantee it is rigid enough to avoid buckling and spillage when the lid is applied.

Mecmesin develops Combi Cork-i Extraction Tester for leading Scottish whisky

To improve the quality and storage of a premium product, the R&D team at a leading Scottish whisky maker needed to optimise the design of their bottle stoppers. They decided that the strength and performance of their reusable stoppers could be ensured by systematic testing of the characteristics of both portions of the stoppers. Working closely with the R&D team, Mecmesin developed the Combi Cork-i Extraction Tester, an innovative multi-function cork extraction testing system that tests both phases of de-corking synchronously.

Greek beauty product manufacturer guarantees production quality by updating to Mecmesin's digital torque testers

A manufacturer of a wide range of skin, hair-care, make-up and sun-care products based in Greece needed to replace their outdated torque testers with up-to-date digital torque testers to guarantee production quality and to ensure their products remained sealed. Mecmesin supplied the company with two Tornado 10N.m digital torque testers, which have the ability to test tamper-evident closures, an intrinsic part of their specification.

  • Jo Webb
  • Product Info
  • English
  • Created 16 Sep 2020
  • Modified 17 Sep 2020
  • Hits 241