Wacker Chemie AG will be presenting its new liquid silicone rubber line ELASTOSIL LR 5040. These grades feature excellent mechanical properties after curing even without thermal post-treatment. They contain only a few volatile components making the liquid silicone rubber (LSR) compliant with regulatory specifications governing sensitive applications in baby-care, food-contact and medical sectors.
Silicone parts intended for use in the baby-care sector and the food industry in Europe must contain no more than 0.5 percent volatile substances. To ensure compliance with this limit, thermal post-treatment is often necessary. That entails heating the cured parts to temperatures of 200 degrees Celsius for several hours in a ventilated oven. This process step, which specialists also refer to as “post-curing”, accomplishes two things: it eliminates volatiles from the elastomer and improves its mechanical properties.
This laborious and expensive procedure will soon be obsolete.
Rubber parts made of ELASTOSIL LR 5040 are translucent with a delicate blue shimmer. Their volatiles content – without thermal post-treatment – is below the required 0.5 weight percent. Even in its non-post cured state, the silicone rubber already exhibits a high level of tear resistance equivalent to that of a post-cured high-tear-strength standard LSR. As a result, it can withstand even high mechanical stresses as may occur during the usage of baby bottle nipples or pacifiers, for example.
These properties make ELASTOSIL LR 5040 the material of choice when manufacturers of baby-care, food-contact or medical products want to do without thermal post-treatment. Typical applications include feeding teats and pacifiers, teething rings, anti-colic valves, bottle tops and seals for food cans, but also respirator masks.
Wacker Chemie AG will be presenting its new liquid silicone rubber line ELASTOSIL LR 5040. These grades feature excellent mechanical properties after curing even without thermal post-treatment. They contain only a few volatile components making the liquid silicone rubber (LSR) compliant with regulatory specifications governing sensitive applications in baby-care, food-contact and medical sectors.
Silicone parts intended for use in the baby-care sector and the food industry in Europe must contain no more than 0.5 percent volatile substances. To ensure compliance with this limit, thermal post-treatment is often necessary. That entails heating the cured parts to temperatures of 200 degrees Celsius for several hours in a ventilated oven. This process step, which specialists also refer to as “post-curing”, accomplishes two things: it eliminates volatiles from the elastomer and improves its mechanical properties.
This laborious and expensive procedure will soon be obsolete.
Rubber parts made of ELASTOSIL LR 5040 are translucent with a delicate blue shimmer. Their volatiles content – without thermal post-treatment – is below the required 0.5 weight percent. Even in its non-post cured state, the silicone rubber already exhibits a high level of tear resistance equivalent to that of a post-cured high-tear-strength standard LSR. As a result, it can withstand even high mechanical stresses as may occur during the usage of baby bottle nipples or pacifiers, for example.
These properties make ELASTOSIL LR 5040 the material of choice when manufacturers of baby-care, food-contact or medical products want to do without thermal post-treatment. Typical applications include feeding teats and pacifiers, teething rings, anti-colic valves, bottle tops and seals for food cans, but also respirator masks.
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