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Fabrication Method Of Multilayer Composite

Jun 29, 2017

    Fluoropolymer is an industrially important material, such as cross-linked and cross-linked carbon fluoride elastomers and semi crystalline or glassy fluorocarbon plastics. Carbon fluoride elastomers, especially vinylidene fluoride and other ene-bonded unsaturated halogenated and non halogenated monomers such as propylene hexafluoride, are particularly suitable for high-temperature applications such as washers and linings. See for example R. A. Brullo "fluorine-containing elastomer rubber for automotive purposes", automotive elastomer and design,Multilayer Composite
   Fluorocarbon plastics (i.e. fluorine-containing plastics) usually have high thermal stability, so it can be used especially at high temperatures. They also have excellent toughness and flexibility at very low temperatures. Many of these fluorine-containing plastics are almost completely insoluble in various solvents, and they are usually chemical-resistant. Some fluorine-containing plastics have very low dielectric loss and high dielectric strength, and many fluorine-containing plastics have unique viscous and low friction properties. For example, see F. W. Billmeyer's Polymer Science textbook, 3rd edition, pp. 398-403, John Wiley & Sons, New York (1984).
Polymers containing siloxane are also important industrial materials. These polymers are known for their wide range of useful temperatures. See, for example, "elastomer, Synthesis", Kirk othmer, Encyclopedia of Chemical Technology, Volume 7th, pp. 698-699 (2nd edition, John Wiley & Sons, 1967), and "Siloxane", Kirk Othmer, Encyclopedia of Chemical Technology, vol. 221-260 (2nd, John Wiley & Sons, 1969). Polymers containing siloxane, such as elastomers containing Siloxane, are also known for their viscosity. This feature becomes a problem in the hope of combining elastomers containing siloxane with other materials.
   The advantages of both polymers are very useful in many product applications. For example, many automotive applications require higher performance standards for high and low temperatures, and require better chemical resistance. One example of these higher performance standards is the new requirement for a swirl supercharger hose for certain automotive or truck engines. These requirements can be met by the unique synthesis of composite structures from polymers containing fluorine-containing polymers and siloxane. However, the methods used to produce these composites are simply unsatisfactory. These methods include grafting of silane-containing layers onto existing solidified fluoropolymer substrates (European Patent No). 0492416. The unsaturated carbon fluoride is grafted onto polysiloxane (United States Patent No. 4,492,786), and a bonding layer is used to bind the peroxide-cured fluorine-containing elastomer to the polymer containing siloxane. These methods require a number of machining steps. Often these methods are complex and time-consuming.Multilayer Composite
   There is still a need for an easily manufactured composite material that is bonded directly to the siloxane polymers. The bonding strength of the composite structure is good at least equal to the bonding strength of the existing composite structure. Better the bonding strength is higher. In addition, the method of manufacturing the composite material should be able to discard the complex and time-consuming methods currently in use. The method and materials are better applied to the fluorine-containing elastomer cured by bisphenol-cured and peroxide, and the bonding layer is not needed. One-step or on-line processing (cross-references processing) is particularly needed.Multilayer Composite
   The two polymers are bonded to each other through a transition region that contains the reaction products of peroxide and (Shan) fluorinated polymers and (Shan) polymers containing siloxane. The amount of peroxide can effectively solidify components containing siloxane and provide a transitional region. Fluorine-containing polymers are selected from thermoplastic fluorinated polymers, fluorine-containing elastomers, and their mixtures.Multilayer Composite