Infrared heat optimally dries silicone coatings on plastic fabrics, ensuring that an airbag deploys quickly in an emergency.
Infrared heat optimally dries silicone coatings on plastic fabrics, ensuring that an airbag deploys quickly in an emergency. Carbon infrared emitters from Heraeus Noblelight help to significantly reduce the reject rate in the production of airbags.
By using medium wave carbon emitters, the heating of the airbag fabric is solved so efficiently that the system pays for itself after the tenth roll of fabric has been coated.
Heraeus Noblelight is presenting infrared emitters and systems that transfer heat in a particularly energy-efficient manner at the ICE trade fair in Munich.
Fabrics for airbags and other safety materials are often made of nylon. A coating of silicone makes the surface more slippery and means that the material can later unfold in a fraction of a second.
However, nylon is hygroscopic, so it attracts water from the environment and can reach a moisture content of between 3 and 5%. It is essential to reduce this moisture before coating to ensure good adhesion of the silicone and optimum surface quality of the fabric.
The drying and preheating processes required for this are solved with carbon infrared systems from Heraeus Noblelight, which are individually controlled and regulated. Optical pyrometers measure the surface temperature of the fabric and then a controller adjusts the power of the infrared emitters so that the material dries optimally without suffering heat damage.
Infrared modules require little additional space and can therefore be retrofitted very easily in coating plants. Medium-wave infrared radiation heats water faster than the fabric. The fast response time of the carbon emitters ensures that no damage occurs to the coated fabric even in the event of a possible belt stoppage.
Optimally pre-dried fabrics noticeably reduce the reject rate. At a British manufacturer, it has been shown that equipping the airbag fabric with infrared emitters solved the heating problem so efficiently that the installation of an infrared system paid off after the tenth roll of fabric had been coated.
Heraeus Noblelight offers the entire range from UV to infrared for drying or curing processes, carries out tests with the materials and advises on the selection of the optimum emitters for the process in question.
Heraeus, the technology group headquartered in Hanau, Germany, is a leading international familyowned portfolio company. The company“s roots go back to a family pharmacy started in 1660. Today, the Heraeus group includes businesses in the environmental, electronics, health and industrial applications sectors. Customers benefit from innovative technologies and solutions based on broad materials expertise and technological leadership. In the 2021 financial year, the FORTUNE Global 500 listed group generated revenues of EUR29.5 billion (US$34.9 billion*) with approximately 16,200 employees in 40 countries. Heraeus is one of the top 10 family-owned companies in Germany and holds a leading position in its global markets. (* calculated with 2021 average exchange rate, 1EUR = 1.1827 US$)
Heraeus Noblelight with its headquarters in Hanau and with subsidiaries in the USA, Great Britain, France and China is one of the technology- and market-leaders in the production of specialty light sources and systems. The organization develops, manufactures and markets infrared and ultraviolet emitters, systems and solutions for applications in industrial manufacture, environmental protection, medicine and cosmetics, research, development and analytical measurement techniques.
Heraeus Noblelight GmbH
Phone: +49 6181/35-8547
Fax: +49 6181/35-16 8547
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