Plastic film thickness gauge, did you choose right?

Whether the thickness of the film is uniform or not is the basis for detecting various properties of the film. Obviously, if the thickness of a batch of monolayer film is not uniform, it will not only affect the tensile strength and barrier properties of the film, but also affect the subsequent processing of the film. In addition, taking reasonable control over the thickness of the product not only improves product quality, but also reduces material consumption and increases production efficiency. Therefore, whether the film thickness is uniform, whether it is consistent with the preset value, and whether the thickness deviation is within the specified range are all important prerequisites for whether the film can have certain characteristics. Film thickness measurement is one of the basic inspection items in the film manufacturing industry.

However, there are a wide variety of thin film thickness measurement devices on the market. Did you choose the right thickness gage for your purchase?

The thickness test of plastic films The earliest measure of film thickness was the laboratory thickness measurement technique. In the laboratory, the film was sampled and the thickness was measured to obtain the thickness data of the film. After that, with the continuous development of technology, online thickness measurement equipment that can be used on thin film production lines was gradually developed. Online thickness gauge technology and off-line thickness measurement technology are totally different in testing principle. In general, on-line thickness gauges mostly use non-contact measurement methods such as ray technology, while non-line thickness measurement techniques generally use mechanical contact type measurement. The method is based on the eddy current, electromagnetic induction principle of measurement methods, but also the use of optical thickness measurement, ultrasonic thickness measurement technology.

Faced with such a large number of thickness measurement methods, when choosing a thin film thickness inspection device, what choice should the company make?

1, beam thickness gauge
The ray technology is mostly used in on-line thickness measurement equipment, and the requirement for the measurement object is not high. However, since the on-line thickness gauge needs to be installed on the film production line, due to changes in the ambient temperature, atmospheric pressure, and fluctuations in the film appearing on the production line, the requirements for the ray thickness gauge are very high, so the price of the equipment and the subsequent maintenance cost will be quite big. For businesses, the cost will be high.

2, mechanical contact thickness gauge
The mechanical contact thickness gauge is essentially different from the non-contact thickness measurement method. The device applies a certain pressure (point contact force or surface contact force) on the measurement surface of the specimen during testing, so that it can be avoided Contact thickness gauges may exhibit large fluctuations in data when measuring materials with a certain degree of compression and uneven surface. The mechanical contact thickness gauge uses the most traditional and basic thickness measurement method. The data is stable and reliable, and there is no selectivity to the sample. Since the measurement accuracy of this thickness gauge mainly depends on the accuracy of the thickness measurement sensor, the test accuracy of the mechanical contact thickness gauge on the market is currently uneven. Labthink's CHY-C2 and CHY-CA thickness gages are developed and manufactured using ultra-high resolution 0.1μm sensors, which have high test accuracy and excellent data stability. They can be applied to a variety of materials such as thin films, composite films, and sheets. Thickness detection. Equipment complies with GB 6672 (Determination of plastic film and sheet thickness - mechanical measurement method), GB/T 451.3-2002 (Determination of paper and board thickness), GB/T 6547, ASTM D645, ASMT D374, ASTM D1777, TAPPI T411 , ISO 4593, JIS Z1702, BS 3983, BS 4817 and other test standards. If the company needs to purchase a non-in-line thickness gage, it may consider the thickness gauge equipment of Jinan Languang Electromechanical Technology Co., Ltd.

3, eddy current thickness gauge, magnetic thickness gauge
Eddy current thickness gauges and magnetic thickness gauges are generally small portable devices that utilize the eddy current principle and electromagnetic induction principle, respectively. The device can be used for a variety of specific coating thickness measurements, but it can be used to measure the thickness of the film, paper, there may be errors. For enterprises with very high test accuracy requirements, considerations need to be taken when purchasing, and the accuracy is not high enough and errors are likely to occur, which may cause unnecessary trouble for the company.

4, ultrasonic thickness gauge
Ultrasonic thickness gauges are also mostly small portable devices that use the principle of ultrasonic reflection to measure the thickness of metals, plastics, ceramics, glass, and any other supersonic waveguides. Can work at high temperatures, which is not available with many other types of thickness gauges, but is selective for the type of test specimen.

The above information is published by Jinan Languang Electromechanical Technology Co., Ltd. Jinan Languang Electromechanical Technology Co., Ltd. specializes in R&D and production of mechanical contact film thickness gauges . For more information, please feel free to contact us.