How to Buy Functional gas-permeable Packaging material

Functional gas-permeable Packaging material is a desiccant packaging material, oil&water resistant packaging material and other packaging materials with air permeability are imported from Japan and ventilation processed by the special technology of our company, and then sold to the desiccant and oxygen absorber manufactures. Gas permeable contact lenses are rigid lenses made of durable plastic that transmits oxygen. These lenses also are called GP lenses, rigid gas permeable lenses, RGP lenses and oxygen permeable lenses. It is mainly used in Desiccant, oxygen absorber.
GP contact lenses are rigid, but they shouldn't be confused with old-fashioned hard contact lenses, which are now obsolete. Hard contact lenses were made of a material known as PMMA. Before 1971, when soft contact lenses were introduced, just about all contact lenses were made from PMMA. Though PMMA hard contacts had excellent optical qualities, they were not oxygen-permeable, and the front surface of the eye needs plenty of oxygen to stay healthy. Also, old-fashioned hard lenses were not as comfortable as modern GP lenses.
In fact, gas permeable contacts transmit more oxygen to the eye than do traditional soft contact lenses (although some silicone hydrogel soft lenses are comparable to GP lenses in oxygen transmission).

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