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How to choose desiccant in plastic tube vials

Apr 15 , 2020

The plastic tube vials produced by test paper barrel manufacturers are mostly used in the packaging of blood glucose test paper, urine test paper packaging, and other test strips packaging. Common test papers have high requirements for moisture-proof packaging and sealing oil. Therefore, placing the desiccant in the bottle cap can effectively prevent the test strip from getting wet, extend its shelf life, and also avoid direct contact between the test strip and the desiccant.


How to choose desiccant in plastic tube vials

test strip packaging

Test paper tubes manufacturers generally choose silica gel desiccant and molecular sieve when choosing desiccant. Silica gel desiccant is a kind of highly active adsorbent material, usually made by reacting sodium silicate with sulfuric acid, and after a series of post-treatment processes such as aging and acid bubbles. Silica gel is an amorphous material, and its chemical formula is mSiO2. nH2O.

Molecular sieve desiccant is a synthetic desiccant product with strong adsorption to water molecules. The pore size of the molecular sieve can be controlled by different processing techniques. In addition to adsorbing water vapor, it can also adsorb other gases. Under the high temperature above 230 ℃, it can still hold water molecules well.

The proportion of desiccant in the bottle cap of the test strip tube manufacturers is mostly (4: 6), but it can also be reasonably adjusted according to some special conditions of the test paper to achieve a better moisture proof effect.

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