Low borosilicate glass bottle and medium borosilicate glass bottle in cosmetic packaging material factory

Low borosilicate glass is a product developed in the last century to meet the rapid development of the domestic pharmaceutical industry and basically meets the requirements of drug use at that time. Because this type of glass material is suitable for domestic production equipment and processes, and has low cost, The high output basically met the needs of my country's drug output at that time, so this type of product has been used in my country to this day, but in essence, low borosilicate glass can only be a substitute for cosmetic neutral glass to reduce the grade, quality and performance.


Neutral borosilicate glass was first proposed in ISO's guidelines for the classification of glass by composition and its test methods for normal mass production in 1999, and my country was the first to adopt it in the draft standard for the classification of glass by composition and its test methods formulated in the year. Because this glass has good chemical stability and low softening point, it is the first choice for cosmetic glass. Through the joint efforts of the cosmetic glass industry, my country not only imports a large number of neutral borosilicate glass tubes to make various cosmetic packaging bottles, but also has its own neutral borosilicate glass pharmaceutical packaging materials. For this reason, the neutral borosilicate glass pharmaceutical packaging material product standards and the high borosilicate glass pharmaceutical packaging material product standards were established separately, which is conducive to the development of high-quality pharmaceutical packaging materials in China.


At present, the vials used by domestic pharmaceutical factories are generally low borosilicate glass, which does not meet the requirements of international neutral glass. The quality is poor, there are many glass chips and there is a phenomenon of peeling, and sometimes it will affect the drug. Medium-boron glass is relatively high in price due to its good material. However, it has very little impact on drugs. Foreign countries have already eliminated low-borosilicate glass containers and choose medium-boron glass containers. The amount of BO contained in low borosilicate glass is u0026#;.%, <.% (gg), and the linear expansion coefficient is .-.; the content of BO in medium borosilicate glass is -% (gg), and the linear expansion coefficient is- .Compared with low borosilicate glass, neutral borosilicate glass has excellent chemical stability and heat resistance. For example, when passing through a high-temperature sterilization tunnel, the vial made of medium borosilicate glass is less likely to be broken.


The difference between low boron and medium boron:


. The most important difference is its chemical properties: the national standard for water resistance of the inner surface of the low borosilicate vial is .mm, and the national standard for water resistance of the inner surface of the medium borosilicate vial is .mm, simply 'water resistance' is The vial is adsorbed on the inner wall of the vial during the subsequent processing of harmful alkaline oxides such as potassium and sodium. The less the oxide, the better the water resistance. The water resistance is good for the PH, pH, clarity, and stability of the drug. This indicator is very good.


.Physical properties: The tolerance of medium boron vials is very small, such as the tolerance standard of tube outer diameter is plus or minus .mm, the color is crystal clear, the strength is very good, and the production equipment is better matched; the low borosilicate tolerance is large and batches For example, the tolerance of the outside diameter of the tube is .mm, and the color is darker and greenish. It is difficult to match imported equipment or high-end equipment.