Borracha de silicone para MOLDES, Diferenças entre elas e qual é a melhor? (AULA COMPLETA)

What are the differences between silicone erasers? Silicone Rubber Manual https://www.redelease.com.br/downloads Materials Mentioned: White Silicone Rubber (https://bit.ly/3XTyOET) Blue Silicone Rubber (https://bit.ly/2HPnO3r) Green Silicone Rubber (https://bit.ly/3kIPK28) Pink Silicone Rubber (https://bit.ly/2JhP6Bt) Red Silicone Rubber (https://bit.ly/3Y5qDoH) Black Silicone Rubber (https://bit.ly/2NYJr4N) Platinum Semi-Crystal Silicone Rubber (https://bit.ly/3jeixLE) RX32 Silicone Rubber (https://bit.ly/2I3kPGX) BX3 8001 Silicone Rubber (https://bit.ly/3kU8XOD) Today we will Let's talk a little about silicone rubbers and their differences. Well, basically, folks, we have two types of silicone rubber: heat-curing rubbers and room-curing rubbers. The most well-known here in Brazil are the room-curing ones, which are called RTV silicone rubber. For over 30 years, Redelease has distributed silicone rubbers from this family for a wide variety of applications: Decorative items: Molding of sculptures and figurines; Furniture: Molding of furniture or decorative elements; Construction: Pre-fabrication of decorative elements and restoration; Jewelry: Molding and replacement of parts in polyester, acrylic, epoxy, etc.; Toolmaking and prototyping: Reproduction of industrial molds and dies; Crafts: Molds for composing figures in biscuit, soaps, candles, plaster pieces, etc.; These are rubbers with a tin-based catalyst. Within this family, you have different types of performance in the rubbers, varying in their hardness, elasticity, and tear resistance. From most flexible to most rigid, we have the following rubbers: White, Blue, Green, Pink, Black, and Red, all of which have the same Shore A. Oh, and what is the difference between the elasticities of silicone rubbers? The more flexible the rubber is, in theory, the better it will reproduce details, precisely because you can bend it more when demolding. However, the more flexible the rubber is, for example, the thicker the mold wall you have to make so that it doesn't lose the squareness of the mold. For example, for soap molds, people use white a lot, for 3D plaster molds many use blue, for sculptures they use pink, and so on. In the case of the red and black rubbers, which are quite rigid, they have the characteristic of being highly resistant to temperature, making them capable of producing some castings such as lead, tin, zamak, and other metals that have a melting point close to 400 degrees Celsius. We also have high-performance rubbers, such as the RX32 and BX3 silicone rubbers. With these, you can produce MANY more parts, up to 4 times more than "entry-level" rubbers. These are widely used in: Encapsulation of electronic components; Manufacturing of parts; High-resistance leather molds for the footwear industry; High-frequency molding. But it's important to understand that nothing is set in stone; you can conduct your own tests and adapt any of them to your application. Within the ambient curing process, we also have semi-crystalline platinum rubber, which is considerably more expensive. These rubbers are typically 1:1 and tend to have greater tear resistance, higher chemical resistance, better finish, and durability. Furthermore, platinum rubbers can be completely non-toxic, making them suitable for confectionery molds, orthopedic prostheses, sex shop items, etc. Obviously, this requires passing tests to obtain the necessary certifications for medical and food-grade approval. Platinum-based silicones have a slightly more delicate characteristic that can often be a problem: their susceptibility to contamination. Some materials, such as those listed below, can easily contaminate rubber: Tin derivatives (e.g., tin system catalysts, etc.) Amine derivatives (e.g., epoxy resin catalysts, etc.) Sulfur derivatives (e.g., vulcanized rubbers, certain dyes, etc.) Therefore, you end up needing a more sterile environment. Now, let's talk a little about HTV, which are heat-curing silicones. This type of silicone is also called high-consistency silicone; it is a gum that is pressed into a mold while hot, and its catalyst is peroxide-based. The main disadvantage is that its production is done only by machinery, and in order to reduce costs, the molds are extremely thin and produced on a gigantic scale. Precisely because of the thin walls, the molds have a very short lifespan and lose their squareness quickly. Follow us on all social media: @redelease Where to buy: http://www.redelease.com.br Visit a Redecenter: https://www.redelease.com.br/lojas-fi...