In tape peel strength testing, sample preparation, environmental conditions, and testing speed are the three critical factors that influence the test results. These factors directly determine the accuracy and reliability of the test data. Below, we will elaborate on each of these aspects, providing a detailed analysis of their importance and key considerations.
Today, we will focus on discussing sample preparation.

1. Sample Preparation: Details Determine Success

Sample preparation is the first step in peel strength testing and is also the most error-prone stage. A qualified sample must meet the following conditions:

• Adhesion Quality Between the Tape and the Substrate: The tape must be evenly adhered to the substrate surface, avoiding bubbles, wrinkles, or incomplete adhesion. Bubbles or gaps can significantly reduce test results, leading to distorted data.

• Sample Dimensions and Shape: The width and length of the sample must comply with testing standards. Typically, the width is 25 mm, and the length is determined based on testing requirements. Irregular sample dimensions can affect force distribution, resulting in inconsistent test results.

• Substrate Surface Treatment: The substrate surface must be clean, dry, and free of oil, dust, or other contaminants. If necessary, sanding or corona treatment can be performed to enhance the tape's adhesion.

• Curing Time: After the tape is applied, it must be left to rest for a period to ensure the adhesive fully cures. Insufficient curing time may result in incomplete bonding, affecting the test results.

Precautions: Sample preparation must strictly follow testing standards to ensure consistent adhesion quality for each sample and avoid human error.