Butyl rubber stopper The film materials used in this technology are mostly poly ETFE film, Teflon film, polyethylene film and polypropylene film. Among them, the membrane is an inert material, and its technical products have been recognized by the US Food and Drug Administration (FDA) for use in the food and pharmaceutical industries. Its material characteristics are expressed as carbon-fluorine bonds with high bond energy in the molecular structure of fluorine-based resins. Due to the shielding effect formed by fluorine atoms outside the carbon chain, it has different chemical resistance; film ETFE (ethylene-tetrafluoroethylene) Vinyl fluoride copolymer) has very good physical and chemical properties, it is a kind of advanced material that not only has the different properties of PTFE, but also has polyethylene easy thermoplastic processing and low price. This film has strong flatness, single-sided activity Features a high level of handling. In summary, fluorinated polymers have different material properties that make them particularly useful for isolating pharmaceuticals, but their low surface makes them difficult to bond polymers. Therefore, it is particularly important to study the surface treatment technology of materials, which is a technology that can make fluorinated polymers strongly adhere to the surface of polymer elastomers.
The point of the film sticking technology is: the heat sealing process does not use any organic solvent and adhesive, so there is no chemical residue; the film in direct contact with the drug is not surface-treated, and the small surface tension can reduce the adsorption of the drug; the dense film It has good properties and can ensure good shielding performance and stability with drugs; the disadvantages are: it is prone to weak adhesion of the film material, the film is easy to fall off, the film material has poor elasticity, the hardness of the film-coated rubber plug is high, and self-sealing is easy to occur. Poor performance, poor acupuncture performance, etc., and the price is also more expensive.
klstopper.com