For high-quality, persistent consumer goods used in our houses, food-grade silicone rubber has grown in popularity. The strength, purity, and reusability that are necessary for various food preparation and storage goods are provided by this particular type of silicone. It is perfect for use in gas and electric appliances since it can tolerate extremely hot and cold temperatures. In this article, we’ll look at the advantages and uses of liquid silicone rubber (LSR) that is appropriate to use in food products, in addition to how it could enhance their quality and safety.

What is Liquid Silicone Rubber (LSR)?

The material known as liquid silicone rubber (LSR) has no taste or odor and has been recognized for being mold and bacterium-resistant. It is simple to maintain and hydrophobic, indicating that it repels moisture. LSR is a safety barricade against unwelcome contaminants in items related to food by the aforementioned features. 

The two components of food-grade liquid silicone rubber, designated as component A and component B, are an addition-type silica gel. Silica gel makes up component A, whereas platinum catalyst is found in component B. White carbon black, silicone oil containing hydrogen, platinum catalyst, and 107 base gum make up the entirety of the addition-type two-component liquid silica gel. The platinum catalyst is one of the essential parts of this. Only a platinum catalyst can guarantee that the two components of AB are properly strengthened and developed.

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About LSR

Applications of Food-Grade LSR

Food-grade LSR is used in a wide range of products, from those used in homes and commercial institutions to hospitals and schools. It is commonly used in baby bottles, pacifiers, eating utensils, beverage bottles, and food storage products. These products require both safety and strength. LSR is also used in cooking utensils, oven mitts, baking cups, molds, ice cube molds, and other food-contact products that need to withstand extreme hot and freezing temperatures without degrading over time. Valves, membranes, gaskets, and seals that are exposed to food also utilize food-grade LSR. It is easy to sterilize, has a low creep and compression set, and maintains its integrity even in heavy-duty applications.

How Does Food Grade Silicone Rubber Benefit Production?

Over other materials, food-grade silicone rubber has an assortment of characteristics. Since it has absolutely no taste or odor, food and drink retain their original purity and essence. It is a dependable material that is capable of withstanding corrosive impacts and certain chemical solutions due to its mechanical stability and chemical inertness. Food-grade LSR is also difficult to absorb vibrations effectively and has the capability of resuming its former shape even in the face of drastic temperature changes. It conforms with the Food and Drug Administration’s recommendations and HACCP best practices, making it a safe and effective option. LSR also offers versatility in design and processing, facilitating the production of complicated parts and multi-material components. It is an excellent choice for food-grade products because of its numerous possibilities of uses and adaptability when combined across different substrates.

How to Identify Food Grade Silicone Rubber?

Next, let’s share tips about how to identify food-grade silicone rubber.
• Set apart from the food-grade silicone product scent
The average silicone has a strong, foul-smelling smell. Food-grade silicone has no odor and is non-toxic. It is a silicone that is kind toward the environment and has no odor.

Based on food-grade silicone products’ powerful resistance to temperature
The average high-temperature resistance of food-grade silicone is 250 degrees, while its highest possible short-term high-temperature resistance is 350 degrees. However, the maximum temperature for typical silicone is just about 150 degrees

• Based on silicone’s degree of stretch
Consider a silicone sheet with the same hardness as an illustration. Take a small piece of silicone sheet in your palms, stretch it out, then pull firmly on it with both hands. If it becomes white as you eliminate it and you smell anything strongly scented, it is likely simply ordinary silicone. On the other extreme Food-grade silicone with good stretchability does not turn white when pulled. It sometimes fails to turn white when pulled. There will be a faint perfume because the vulcanization process creates by-products for the manufacturer. However since the silicone is food-grade, there are unlikely to be any quality issues regarding the finished item, and the unpleasant smell will go completely on its own.

We could deduce from the methods employed for recognizing food-grade silica gel above that if you’re looking for food-grade silicone rubber, you should see if the item has been approved by the FDA (Food and Drug Administration) or another regulatory body in your country. This certification certifies that the silicone rubber satisfies the safety regulations required when in contact with food. To ensure the caliber of what you’re buying, you can also look for additional acknowledges like the ones from the NSF (National Sanitation Foundation) or BfR (Bundesinstitut für Risikobewertung). Furthermore, it’s important to ensure that the silicone rubber is devoid of any harmful substances or additional substances that might contaminate food.

How to Identify Quality of Food-Grade Silicone Rubber?

Considering the appearance first. The transparent, outstanding, and delicate food-grade silicone liquid is made of contemporary ones, along with excellent-quality components. The liquid silicone gel is exceptionally smooth and has excellent fluidity, as evidenced by its occurrence. The liquid silica gel made from scrap rubber fractured materials is opaque and yellow, and the silicone oil layer in the glue is not completely distinct from the liquid silica gel. When whipped around, poor liquid silicone exhibits readily apparent lumps and impurities and has low fluidity.
before taking appearance into account. The readily apparent superb, and delicate food-grade silicone liquid is manufactured using modern materials and exceptional components. Their occurrence illustrates the liquid silicone gel’s outstanding fineness and great fluidity. The silicone oil layer in the glue is not completely distinguishable from the liquid silica gel, because it’s opaque and yellow and formed from materials that were once scrap rubber that had been split. Poor liquid silicone displays restricted fluidity and easily identifiable lumps and impurities when turned about in general.

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