Composite chemical indicator for pressure vapour sterilization and its preparing process and application

Abstract

A composite chemical indicator for high-pressure steam sterilization in hospital is prepared from adhesive, colouring reactant, reactant and solvent. It can be printed on the object or made into indicating card, label, adhesive tape or disposable sterilization bag.

Description

technical field [0001] The invention belongs to the field of sterilization chemical indicators, and also belongs to the field of packaging materials for disposable medical supplies or sterilization packaging materials for medical instruments. Background technique [0002] Pressure steam sterilization is one of the most common and widely used sterilization and disinfection methods. It is widely used in daily sterilization work in hospitals and is also used in many industries such as pharmaceuticals, medical devices, food, beverages, and feed. Main sterilization and disinfection methods. Now the chemical indicators used to test the sterilization effect are made into indicator cards, strips, self-adhesive labels, self-adhesive tapes, etc. The above products are formed by printing the indicators on paper through the traditional screen printing process or made by other special techniques, such as: CN1034393, CN1063898, CN1079550, CN1036262, CN2314...

AI Technical Summary

Problems solved by technology

[0003] 1. The operation is cumbersome;

[0004] 2. The material of the bag is used repeatedly, which is easy to cause infection;

[0005] 3. Put the indicator directly into the bag and directly contact with the equipment. Harmful substances in the formula, such as lead, will pollute the equipment and endanger human health.

[0006] 4. The indicator contains a lot of sulfur, which will produce a lot of corrosive gas, corrode equipment and sterilization equipment

Moreover, because the thickness of the printing layer cannot be accurately fixed during the printing process, the yellow color after printing is relatively light, so the thickness has little effect on the color, and the color of the end point after sterilization can be dark or light, which cannot effectively indicate the end point, and the initial color is the same , the color of the end point after sterilization is brown, black, brown, or gray, which is easy to cause false impressions to the observer. Therefore, when the color after sterilization is indicated in some foreign products that use gravure or flexographic printing, some of them are black ( black), some are dark (dark), some are brown or brown (brown), etc.

[0017] 2. When this kind of indicator is used to make printing materials, due to the poor coloring effect of the reactants, in order to improve the coloring effect, the amount of lead carbonate and sulfur must be increased. The addition of a large amount of these inorganic substances still cannot give the indicator proper printing performance , so it can only be used for screen printing, and cannot realize industrial printing

For example, in the "sulfur-lead" method ink, more than 100 grams of lead carbonate and sulfur must be added to 100 grams of 20% resin solution to make the end point black; Viscoelasticity, the addition of these inorganic substances should not exceed 50%, so it does not have printability

[0018] 3. This formula contains lead, and this indicator is placed in the sterilization package and directly contacts the sterilized equipment, causing heavy metal pollution and endangering human health

[0019] 4. Due to the large amount of sulfur used, a large amount of acid gas is produced, such as: SO 2 、H 2 S, CO 2 Corrosion and sterilization equipment and instruments, and produce unpleasant smell