Up to now, silicone products usually need to be re vulcanized to achieve the desired performance. In recent years, Wacker has introduced liquid silicone rubber products with low VOC content and no need for secondary vulcanization, which can meet the strict regulatory requirements in sensitive applications.
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Learn about wacker's new liquid silicone rubber
Elastosil? LR 5040 series!
One
VOC content decreased
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In order to meet the needs of customers, we have greatly reduced the VOC content of liquid silicone rubber products produced by European factories. In this process, we upgraded the Wacker liquid silicone rubber series to a low VOC product series.
——Dr. by Wolfgang schattenmann, business team leader, silicone rubber solutions, Wacker
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As for the proportion of VOC content in organosilicon, organosilicon products used in food and baby care products must be of high purity, and the VOC content shall not be higher than 0.5%. In addition, organosilicon products used for technical applications are generally required to be free of volatile organosilicon components.
Wacker's approach can meet these different needs: on the one hand, Wacker changed its entire liquid silicone rubber product line to a low VOC one; on the other hand, it launched elastosil? LR specifically for the unique requirements of the food, infant care, medical technology and pharmaceutical industries 5040 series - this is by far the lowest volatile, extractable or migrating component in the Wacker liquid silicone rubber portfolio. In addition, this series of products also meet the regulatory requirements of VOC content in sensitive applications.
Two
No need for secondary vulcanization
For silica gel products manufacturers, secondary vulcanization will not only lead to a large number of energy consumption, increase emissions, but also affect production efficiency. For manufacturers like ricogroup, a global provider of all-round customized polymer solutions, the elastosil? LR 5040, which has many advantages, ultimately saves a lot of costs.
"With the help of elastosil? LR 5040, we do not need to carry out secondary vulcanization at all, and can directly carry out final packaging after production. This will not only reduce related processes, but also save valuable resources and human costs. " Rico group said.
Three
Suitable for injection molding
At present, elastosil? LR 5040 products range in hardness from shore A20 to shore A70, including a product with a hardness of shore A45 suitable for many baby care applications. Different from the hardness of traditional silicone rubber, the hardness here refers to the hardness of the material without secondary vulcanization.
The hardness deviation of elastosil? LR 5040 series products is very small, only 3 degrees (Shore A). Thanks to this, the manufacturer can meet the hardness requirements of customers with high accuracy.
Four
High purity tear resistance
One of the key reasons why the new liquid silicone can claim high purity is its appearance: translucent and light blue luster. The molding parts produced by this liquid organosilicon have excellent quality and high purity. In addition, secondary vulcanized liquid silicone rubber products are prone to yellowing during storage, and the yellowing tendency of new liquid silicone products has been minimized.
In addition to purity, many sensitive applications require high mechanical properties. The tear strength of Wacker vulcanized rubber products can be up to 50N / mm (measured in accordance with ASTM D 624b) without secondary vulcanization.
Five
New processing methods
Elastosil? LR 5040 brings new possibilities for silicone product manufacturers. Because there is no need for secondary vulcanization process, component manufacturers can greatly simplify production and improve efficiency, thus paving the way for the implementation of full-automatic lean production process. If necessary, the whole production process can be completed in the dust-free room. In addition, the safety of the production process is improved by eliminating the secondary vulcanization process and no need to worry about the formation of explosive air mixture.
In addition to baby care products, the application of silicone products without secondary vulcanization also includes products in contact with food and products used in medical and pharmaceutical technologies, ranging from kitchen appliances, coffee machines and storage containers to metering valves and respirators.