The thickness of a product - be it film, paper or nonwoven - has a direct influence on its quality. In the case of packaging material, for example, parameters such as air permeability and tear resistance must be exactly right. Otherwise it cannot fulfil its task of protecting products from external influences and guaranteeing their integrity. However, this can only be achieved if the material thickness is exactly as specified - and this for each individual production margin.
While homogeneous, reliable and functional products are a necessity for the quality standards required by customers, they have another advantage. High quality goods that exactly meet the specifications reduce production costs. You save raw material and energy by measuring and controlling the web thickness of the material.
Thickness measurement of fabric webs
Web thickness measurement
Our thickness measurement solutions guarantee our customers high quality goods while increasing the efficiency of the production process. The traversing quality measuring system Qualiscan QMS records the desired parameters and provides real-time feedback on the values. Thus, defects can be corrected immediately. Depending on the application and condition of the product, we provide the appropriate sensors.
Sensors for thickness measurement
Gravimat FMI
Control of basis weight / thickness
The beta sensor determines basis weight and thickness by the attenuation of radioactive rays through the substrate located in the measuring gap.
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Transmission of beta rays
The weight monitoring and control system measures the weight continuously, without contact, destruction-free and on moving product. The measurement is based on the attenuation of rays from a radioactive isotope through the substrate located in the measuring gap. This attenuation in intensity is an indication of the weight of the product.
Product Highlights
- Highest repeatability ofthe measured values
- Non-contacting measurement
- Digital signal processingTemperature compensation
- Source ageing compensation
- Gap compensation
Customer benefits
- Material saving
- Quality assurance
- Increased production
- Comprehensive quality documentation
| Specification | Value | Unit | |
|---|---|---|---|
| Isotope | Krypton-85 (Kr-85) | Strontium-90 (Sr-90) | |
| Activity | 3,0 / 9,62 | 0,5 | GBq |
| Measuring range | 10 - 1400 | 100 - 6000 | g/m² |
- Coating of textiles
- Carpet coating
With the common basis weight measurement is based on the attenuation of radioactive rays through the substrate located in the measuring gap. This attenuation in intensity is an indication of the weight of the product. The basis weight is hereby determined without contact and continuously at high accuracy.
For very different weight ranges, such as pile carpeting or coated textile bases, different nuclides are available. Differential measurements with two measuring points are normally made to control a coating process. The coating weight is continuously recorded in the process and the application or coating unit of the machine is automatically adjusted. This allows immediately responding even to short frequency changes of the incoming basis weight.
The coating weight is continuously recorded in the process and the application or coating unit of the system is automatically readjusted. In this way, even short-frequency changes in the incoming basis weight are reacted to immediately.
- Krypton-85
- Strontium 90
- Gap cleaning
- Module of the process control Optipac VMC-15
- Stand-alone device
