PNG contact lenses in the origin of the organic silicone
patent occupy most of the market at present the preparation of hydrogels cornea contact lens material mainly hydroxyl ethyl methacrylate (
Vinyl pyrrolidone (
And so on, compared with the material of organic silicon material has better oxygen permeability.
People will have long silicone materials such as silicone rubber products used in contact lenses, at present, high in the air, good compatibility, silicone hydrogel contact lens became the research focus of many multinational companies.
To sum up, our country the development of organic silicon lenses level and the overall level of China's organic silicon industry is not match, should make full use of existing patent resources and huge market in China, the patent escort play a good role, the development of independent brand silicone contact lenses.
Recently, silica gel products industry in China is developing very rapidly, from organic silicon raw materials, intermediate products and the preparation and application has achieved great progress.
Unfortunately, our research lags behind in the field of organic silicon lenses, currently on the market of high oxygen organic silicon lenses almost monopoly by foreign companies.
Has been a steady rise in the number of patents from nearly 20 silicone lenses patent quantity change, from 1998 to 20, gel contact lenses number of patents in general is on the rise, and the peak of 20, 20 public of silicon gel contact lenses patent number is 71.
Between 20 ~ 25, organic silicon lenses are patents are down a bit, but the quantity is stable at a higher level, all public patent quantity is more than 40, visible, organic silicon technology development earlier contact lenses, but the technology is still far from mature, is still in a high-speed development period.
Patent layout disparity solution: inside and outside temperature sealant construction lowest temperature ℃ below the structure, sealing structure of structure adhesive joint base material in actual construction in low temperature environment to do adhesion test, confirm the felt good after construction.
Sealant, sealant factory make note structure can also be sealed by improving the structure silicone article using the environment temperature and humidity to accelerate structural sealant curing, at the same time also need to be appropriately extended maintenance time.
Silicone products, perhaps because the attack against insects is the difference between life and death, nature can produce latex plant very much, there are more than 12000.
Although a lot of plants can produce rubber, including all kinds of trees, but can use mass production plant is only a kind of rubber.
This plant is called hevea (
, we are often referred to as it rubber trees.
At present different gasket materials in rubber and plastic materials in the field of no use, such as silicone gaskets field is adopted by the environmental protection electronic accessories, and other fields, that if you want to apply to water, strong high and low temperature and different environment, how to choose?
The past, you should get what you want to choose!
Intermediate inspection is the key to find and solve the major quality problems.
Therefore, maintain the normal operation of the machine, mold good working state, strengthen the operation of the operator and qc personnel skills and quality consciousness training is the key to reduce production bad, is also the enterprise benefit.
From the raw material, the silica gel is a kind of amorphous material, with a strong adsorption.
The chemical formula for msio2 · nh2o;
In addition to the strong alkali, hydrofluoric acid does not react with any material, insoluble in water and any solvents, avirulent insipidity, stable chemical properties.
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