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FAQ on Dyne Pens
Author：Guangzhou Huayuan Scientific Instruments Co., Ltd.
Click：
Time：2025-09-01 22:03:01
Q1: What is the difference between 40 and 44?
A: The values 40 and 44 represent surface tension in millinewtons per meter (mN/m). A higher value indicates higher surface energy, which improves printability and adhesion in processes such as printing or laminating.
Q2: What is the purpose of dyne pens, and which materials are they suitable for?
A: Dyne pens are used for pretreatment in processes including vacuum electroplating, vacuum coating, sputter coating, PVD, physical vapor deposition, printing (pad, screen, gravure, flexographic), adhesive bonding, and coating.
Applications include: mobile phone housings, mobile phone buttons, P+R buttons, notebooks, computers, automotive lights, automotive interior parts and other components, eyeglass lenses, home appliances, cosmetic packaging containers, detergent packaging containers, various material sheets and films, paper, textiles, synthetic leather, and metals — particularly for pretreatment before painting or printing.
Q3: What precautions should be taken when using dyne pens?
A: Store in a well-ventilated, cool, and dark place. Avoid direct sunlight and do not store in a refrigerator. The optimal storage conditions are 20–25°C and 40–60% relative humidity.
Q4: What is the testing principle and method for dyne pens?
A: Also known as surface tension test pens, corona pens, or printing pens, dyne pens use a test fluid with known wetting tension applied to the material surface. The wetting behavior is observed to determine the surface tension. This method allows simple and effective analysis of slight variations in surface energy, hydrophilicity, and wettability of different solids. Merely drawing a line on the substrate provides quick and accurate results. These pens are designed for production-line use and should be operated by trained personnel.
To test, begin with an intermediate value such as 40 mN/m. If the line remains continuous for 2 seconds, the surface energy is greater than or equal to the selected value. A higher value pen should then be used. Repeat until the line retracts into droplets within 2 seconds. The previous value is taken as the surface energy of the substrate and used for comparative analysis.
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