Measures to Ensure the Physical Strength of Tubular Glass Vial
Tubular glass vials are the main inner packaging containers used in small doses (2 ml to 30 ml) of medicine in the world. Tubular glass vials are made by the glass tube after the flame processing, the main process has a burning mouth, burning bottom, annealing, inspection, packaging and so on.
There are many advantages of tubular glass vials, such as lightweight, uniform wall thickness, stable chemical properties and so on. In the use of tubular glass vial, the problems that are easy to occur are physical strength problems such as crushing and falling etc. How to ensure the physical strength of tubular glass vial is a factor that glass vials manufacturers always need to focus and control.
Taian Youlyy Industrial Co., Ltd. has been constantly exploring and studying how to improve the physical strength of glass vials. At present, it is mainly achieved by the following measures:
一. Control of Raw Material for Glass Tubes
The physical strength of the glass tube itself directly determines the physical strength of the tubular glass vials. It is mainly reflected in three aspects.
1. Expansion Coefficient of Glass Tube
The bigger the expansion coefficient, the lower the physical strength, otherwise the stronger the physical strength. Taian Youlyy Industrial Co., Ltd always chooses smaller expansion coefficient among the glass tubes of the same grade.
2. Composition of Glass Tube
In the raw materials used in the production of glass tubes, some ingredients can enhance physical strength, of which B2O3 is particularly obvious. Taian Youlyy Industrial Co., Ltd has always chosen a glass tube with high content of B2O3 .
3. Wall Thickness of Glass Tube
The thicker the wall thickness of the glass tube, the greater the physical strength of the glass tube, and the greater the physical strength of the corresponding tubular glass vials. Taian Youlyy Industrial Co., Ltd. always choose bigger-thickness glass tubes with a controllable production process.
二. Control of Production Process
Under the same raw material conditions, Control production process of tubular glass vials is the main factor to ensure and improve the physical strength of tubular glass vials. The production process determines the size and shape of the glass vials, surface structure, stress and other factors that affect the physical strength of the glass vials. Taian Youlyy Industrial Co., Ltd. focuses on the control of production processes:
1. Thickness of Bottom
The thickness of tubular glass vial has a reasonable range, too thin and fragile, too thick the structural stress at the bottom is too big, will also affect the physical strength of the bottom of vial, It must be reasonable according to the wall thickness of the vials body.
2. Chamfering of The Vials Bottom
The size of the chamfer transition from the body to the bottom will also affect the physical strength of the bottom. If the chamfer is too small, the structural stress will be too large, and the chamfer will be too large, which will affect the appearance of the glass vials. So it is very important to control this chamfer within a reasonable range.
3. Annealing Process
To control the production process of glass vials, the local temperature will exceed 700 degrees Celsius (the critical value of the softening temperature of medical glass), and the part without flame burning generally will not exceed 300 degrees Celsius (the fired part conducts heat), This temperature difference causes permanent internal stress in the glass vials. To eliminate this permanent internal stress, the glass vials must be annealed. The annealing temperature is generally controlled between 520 degrees Celsius and 600 degrees Celsius. The reasonable annealing temperature should be selected according to the size of the glass vials, the wall thickness, and the speed of the annealing furnace mesh belt. Once the annealing temperature setting is unreasonable, the permanent internal stress of the glass vials cannot be eliminated or not completely eliminated, thereby reducing the physical strength of the glass vials.
During the annealing process, the relationship between the time the glass vials enters the annealing furnace and the temperature, the heating time, the holding time, the cooling time, and even the posture of the glass vials on the mesh belt of the annealing furnace (horizontal lying, standing, reclining) It will also affect the effectiveness of permanent internal stress relief.
Only the above annealing process of the details of the process are controlled in place, the internal stress of the glass vials be completely eliminated and the physical strength of the glass vials can be improved. Taian Youlyy Industrial Co., Ltd. always pay attention to the summary of these quantitative data, according to the order requirements, the use of glass bottles, the size of the size of the glass vial and other factors to set the most reasonable annealing process, to ensure that the glass vial has a better physical strength.
三. Control of Packing
For normal glass vial packaging, the glass vial is put in the inner box (corrugated cardboard material or PP plastic material) and then heated with a heat shrink film (POF material). Taian Youlyy Industrial Co., Ltd. always selects good packaging materials to protect the glass vial, reducing the temporary stress caused by the collision between the glass vial and the glass vial during transport.
In order to avoid the direct collision of glass vials and glass vials, Taian Youlyy Industrial Co., Ltd. launched a nest inner box packaging, each glass vial is fixed in a separate hole, so as to effectively protect each glass vial.
The improvement and perfection of technology is endless. Taian Youlyy Industrial Co., Ltd. focus on the production and R&D of tubular glass vials, committed to improving the physical strength of tubular glass vials, and strive to provide customers with high quality tubular glass vials.
Contact Person: Ms. Sophia