Extrusion molding method for medical catheter tube
An extrusion molding, medical catheter technology, applied in applications, household appliances, tubular articles, etc., can solve the problems of difficult production of precision medical catheters, dependence on imports of precision medical catheters, and the inability of processing equipment and processes to meet their production requirements. Achieve a high degree of automation in the production process, improve product surface quality and dimensional stability
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Embodiment 1
[0018] Such as figure 1 As shown, the medical resin is extruded first, then the tube blank is pre-cooled with a water ring, and finally vacuum sized to obtain a medical catheter tube.
[0019] Specifically, the polyethylene resin was dried at 70°C for 4 hours, and then extruded in an extruder, wherein the temperature of the first zone of the extruder was 205°C, the temperature of the second zone was 215°C, and the temperature of the third zone was 220°C , The temperature in the fourth zone is 220°C, and the temperature in the fifth zone is 225°C. After extrusion molding, the extruded tube blank is sprayed with water in the form of annular spray at a water temperature of 20°C to cool down, and then vacuum sized at 0Kpa. Under the preparation conditions, five groups of catheters were prepared in parallel, and the surface of the prepared medical tubing was smooth, and the dimensions of the tubing were shown in Table 1 below:
[0020] Table 1. Dimensions of each group of cathete...
Embodiment 2
[0023] A medical catheter tubing was prepared through the same steps as in Example 1.
[0024] Specifically, the polypropylene resin is dried at 90°C for 4 hours, and then extruded in an extruder, wherein the temperature of the first zone of the extruder is 203°C, the temperature of the second zone is 210°C, and the temperature of the third zone is 220°C , The temperature of the fourth zone is 220°C, and the temperature of the fifth zone is 220°C. After extrusion molding, the extruded tube blank is sprayed with water in the form of annular spray at a water temperature of 80°C to cool down, and then vacuum sized at -60Kpa. Under the preparation conditions, five groups of catheters were prepared in parallel, and the surface of the prepared medical tubing was smooth, and the dimensions of the tubing were shown in Table 2 below:
[0025] Table 2. Dimensions of each group of catheter tubing
[0026]
[0027]
Embodiment 3
[0029] A medical catheter tubing was prepared through the same steps as in Example 1.
[0030] Specifically, the polyethylene resin was dried at 80°C for 4 hours, and then extruded in an extruder, wherein the temperature of the first zone of the extruder was 195°C, the temperature of the second zone was 205°C, and the temperature of the third zone was 215°C , The temperature in the fourth zone is 220°C, and the temperature in the fifth zone is 223°C. After extrusion molding, the extruded tube blank is sprayed with water in the form of annular spray at a water temperature of 50°C to cool down, and then vacuum sized at -30Kpa. Under the preparation conditions, five groups of catheters were prepared in parallel, and the surface of the prepared medical tubing was smooth, and the dimensions of the tubing were shown in Table 3 below:
[0031] Table 3. Dimensions of each group of catheter tubing
[0032]
[0033] It can be seen from Examples 1 to 3 that the surface of the cathet...
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