Drum shape container for body fluid treatment device and body liquid treatment device

A processor and body fluid technology, applied in the direction of dialysis system, etc., can solve the problems of undeveloped strength and improvement, and achieve the effect of improving the assembly process and the forming production rhythm.

Active Publication Date: 2008-07-02
ASAHI KASEI MEDICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, since it is important to use a thin-walled container for a cylindrical container for body fluid treatment in terms of cost performance, it is not a good idea to simply increase the strength of the container by thickening it.
On the other hand, as mentioned above, for the weld line that appears in the molded product, only focus on improving its appearance defects, and there has been no research focusing on the improvement of the strength near the weld line, especially the improvement of the impact strength.

Method used

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  • Drum shape container for body fluid treatment device and body liquid treatment device
  • Drum shape container for body fluid treatment device and body liquid treatment device
  • Drum shape container for body fluid treatment device and body liquid treatment device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] As shown in Figure 1, a gate 2 is set at a central part of the circumferential surface of the cylindrical container 1, and a styrene-butadiene copolymer resin is injection molded to obtain a total length of 280mm, an outer diameter (tube portion) of 40mm, A cylindrical container for a body fluid treatment with a wall thickness of 2mm. In the mold part that abuts on the outer surface side of the weld line 3 that appears on the cylindrical container 1, three molds are installed at approximately equal intervals as gas discharge parts. The exhaust needle 6.

[0083] As a result of the impact test A, it was confirmed that the impact strength of the part not on the weld line was 20kg·cm / cm, while the impact strength on the weld line was 12kg·cm / cm, maintaining 60% of the impact resistance strength. The results are shown in Table 1.

Embodiment 2

[0085] As shown in Figure 2, gates 2 are set at two positions near both ends of the circumferential surface of the cylindrical container 1, and a styrene-butadiene copolymer resin is injection-molded using a mold to obtain a total length of 280mm and an outer diameter (tube portion) ) of 40 mm and a wall thickness of 2 mm for a cylindrical container for body fluid treatment. In this mold, the mold part on the outer surface side that abuts on the weld line 3 that appears on the cylindrical container 1 faces each other on the circumferential surface. Install two exhaust needles 6 as gas discharge parts.

[0086] As a result of the impact test A, it was confirmed that the impact resistance of the part not on the weld line was 20kg·cm / cm, while the impact resistance on the weld line was 11kg·cm / cm, maintaining 55% of the impact resistance strength. The results are shown in Table 1.

Embodiment 3

[0088] As shown in FIG. 3, except that the structure of the mold for obtaining the cylindrical container 1 with threads applied to both ends is used, the same mold as in Example 2 is used to install the gate and the exhaust needle, and the acrylonitrile resin is injection-molded. A cylindrical container for a body fluid treatment device having a total length of 280 mm, an outer diameter (cylindrical portion) of 40 mm, and a wall thickness of 2 mm was obtained.

[0089] As a result of the impact test A, it was confirmed that the impact resistance of the part not on the weld line was 16kg·cm / cm, while the impact resistance on the weld line was 10kg·cm / cm, maintaining 63% of the impact resistance strength. The results are shown in Table 1.

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Abstract

The present invention provides a cylindrical container for a body fluid treatment and a body fluid treatment. Even if the cylindrical container for a body fluid treatment is injection-molded with a plastic material with low impact resistance strength, the strength near the weld line can be reduced less, It is a cylindrical container for body fluid treatment with high impact resistance that is not easily broken even if it is knocked with tweezers during prefilling operation. The cylindrical container for the body fluid treatment is formed by injection molding a plastic material with an impact strength of 10 kg·cm/cm or less using a mold provided with a gas discharge portion in the mold portion abutting against the weld line of the molded product.

Description

technical field [0001] The present invention relates to a cylindrical container for body fluid treatment and a body fluid treatment using the same. More specifically, it relates to a cylindrical container for body fluid treatment having practical impact resistance even when it is injection molded from a plastic material having low impact strength, and a body fluid treatment using the same. Background technique [0002] In recent years, the patient's blood has been taken out of the body to remove wastes in the blood through dialysis or filtration, or to remove autoantibodies, immune complexes, low-density lipoproteins and other pathogenic substances through adsorption or filtration, and then return the purified blood to the patient. Extracorporeal circulation blood purification therapy for patients is becoming popular. For example, hemodialysis therapy for patients with chronic renal insufficiency, adsorption therapy, double-filtered plasma depletion therapy, and plasma exch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/34A61M1/14A61M1/16B29K25/00B29K23/00B29K33/20B29K55/00
Inventor 田中刚
Owner ASAHI KASEI MEDICAL CO LTD
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