Colorless transparent glass container 0 with the h

2022-09-19
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Colorless transparent glass containers that block ultraviolet rays

glass containers are different from other cans or paper containers in that they can clearly see the transparency of their contents. But because of this, external light is also easy to pass through the container, "said an Limu, which leads to the deterioration of the contents

for example, if beer or other drinks are exposed to the sun for a long time, they will produce peculiar smell and discoloration. Among the light that causes the deterioration of contents, the most harmful is ultraviolet light with a wavelength of 280-400nm

in the use of glass containers, the contents clearly show their true colors in front of consumers, which is an important means to show the characteristics of their goods. Therefore, the users of glass containers very much hope to have a new product that is colorless and transparent and can block ultraviolet radiation

in order to solve this problem, a colorless transparent glass called UVA f Lin t that can absorb ultraviolet rays (UVA means absorbing ultraviolet rays) has been developed abroad recently. The production method is that on the one hand, by adding metal oxides that can absorb ultraviolet rays to the glass, and using the color complementary effect, and then adding some metals or their oxides, the colored glass will fade. At present, the commercialized UVA glass is generally added with vanadium oxide (V2O5) and cerium oxide (CeO2)

since the ideal effect can be obtained by adding only a small amount of vanadium oxide with overload protection and other functions, it should be tightened in time; If the machine is not used for a long time after the experiment, only a special additive feeding tank is needed in the melting process, which is especially suitable for small batch production

the random sampling test of light transmittance at 330nm for UVA glass and ordinary glass with a thickness of 3.5mm shows that ordinary glass is 60.6%, while UVA glass is only 2.5%

in addition, the fading test was carried out by irradiating the blue pigment samples encapsulated in ordinary glass and UVA glass containers with ultraviolet light with an irradiation amount of 14.4j □. The result was that the color residual rate in ordinary glass was only 20%, while there was almost no fading in UVA glass. The comparative test confirmed that UVA glass has the ability to effectively suppress fading

the sunlight exposure test of wine canned in ordinary glass bottles and UVA glass bottles also showed that the discoloration degree and taste deterioration degree of the former wine were much higher than the latter

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