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Degradation type disposable syringe and method of producing the same

A syringe, disposable technology, applied in the direction of syringes, hypodermic injection devices, infusion sets, etc., can solve the problems of undisclosed base material preparation, granulation and syringe molding process, etc., to achieve detailed and reasonable preparation process, fast degradation speed, production low cost effect

Active Publication Date: 2009-12-16
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the base material for the syringe is only carbon dioxide copolymer, and the preparation, granulation and injection molding process of the corresponding base material are not disclosed

Method used

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  • Degradation type disposable syringe and method of producing the same
  • Degradation type disposable syringe and method of producing the same
  • Degradation type disposable syringe and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 Syringe jacket injection molding method

[0051] Using the degradable base material of formula 1 or formula 2, the injection molding method of the syringe jacket 4 is as follows:

[0052] In the first step, the pellets of the degradable substrate of formula 1 or formula 2 were vacuum-dried at 80° C. for 8 hours, and then used.

[0053] The second step of injection molding: put the dried pellets of the degradable base material of formula 1 or formula 2 into the injection molding machine for injection molding. The barrel temperature is set as: feed inlet 30°C, compression section 195°C, metering section 200°C, nozzle 185°C;

[0054] Mold temperature: 30°C,

[0055] The injection pressure is: 110MPa,

[0056] Injection time: 16 seconds,

[0057] The holding time is: 3.0 seconds,

[0058] The screw speed is: 40 rpm,

[0059] The syringe jacket 4 adopting the degradable base material of formula 1 or formula 2 was obtained.

Embodiment 2

[0060] Embodiment 2 Syringe jacket 4 injection molding method

[0061] Using the degradable base material of formula 3, the injection molding method of the syringe jacket 4 is as follows:

[0062] In the first step, the pellets of the syringe jacket 4 of the degradable base material of the formula 3 were vacuum-dried at 60° C. for 24 hours, and then used.

[0063] The second step of injection molding: put the dried pellets of the syringe jacket 4 of the degradable base material of the formula 3 into the injection molding machine for injection molding. The barrel temperature is set as: feed inlet 30°C, compression section 145°C, metering section 165°C, nozzle 155°C;

[0064] Mold temperature: 30°C,

[0065] The injection pressure is: 100MPa,

[0066] Injection time: 14 seconds,

[0067] The holding time is: 2.6 seconds,

[0068] The screw speed is: 30 rpm,

[0069] A syringe jacket 4 using the degradable base material of formula 3 was obtained.

Embodiment 3

[0070] Example 3 Injection Molding Method of Syringe Hub 2

[0071] Using the degradable base material of formula 1 or formula 2, the injection molding method of the syringe needle seat 2 is as follows:

[0072] The first step is to vacuum-dry the pellets of the degradable substrate of formula 1 or formula 2 at 80°C for 8 hours before use.

[0073] The second step of injection molding: put the dried pellets of the degradable base material syringe jacket of formula 1 or formula 2 into the injection molding machine for injection molding. 180°C, metering section 185°C, nozzle 170°C;

[0074] Mold temperature: 30°C,

[0075] The injection pressure is: 95MPa,

[0076] Injection time: 8.5 seconds,

[0077] The holding time is: 1.6 seconds,

[0078] The screw speed is: 35 rpm,

[0079] A syringe needle hub 2 using a degradable base material of formula 1 or formula 2 is obtained.

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Abstract

The invention relates to a degradable disposable syringe and a preparation method. The syringe has a jacket, core rod, needle seat and needle cap, all of which can be completely degraded in the natural environment. The degradable base material used is composed of degradable polymer main materials, plasticizers, stabilizers, stabilizing aids and fillers. to make. The specific injection molding process of each part of the syringe is: feed inlet 20-60°C, compression section 100-200°C, metering section 130-240°C, nozzle 130-220°C; mold temperature: 20-50°C; injection pressure: : 40-200MPa; injection molding time: 8-90 seconds; holding time: 0-5 seconds; screw speed: 20-180 rpm, the performance of the obtained degradable syringe fully meets the national standards (GB 15810-2001). The syringe will not pollute the environment after it is discarded, and avoids being illegally reused, and can completely replace the disposable polyolefin syringe.

Description

technical field [0001] The invention relates to the field of degradable disposable medical devices, in particular to a degradable disposable syringe and a preparation method. Background technique [0002] At present, most disposable syringes are made of materials such as polyvinyl chloride, polyethylene, and polypropylene. Discarded syringes cannot be degraded or destroyed in the natural environment, thus becoming medical waste, polluting the environment, and endangering people's health. Usually, centralized incineration and destruction are used to dispose of discarded syringes, which not only violates the principle of sustainable resource development. Moreover, after treatment, a large amount of black smoke, hydrogen chloride gas, and highly toxic dioxins and other substances will be produced, seriously polluting the environment. On the other hand, due to poor management of some medical institutions or driven by profit, disposable syringes are illegally recycled, sold and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/178A61M5/315A61M5/32A61M5/34C08L67/00C08L101/16C08K5/57C08L5/10C08K3/36
Inventor 栾世方殷敬华姜国伟
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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