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., and achieve the effect of detailed and reasonable preparation process

Active Publication Date: 2008-04-02
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent, the base material for the syringe is only carbon dioxide copolymer, and the prepara

Method used

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  • Degradation type disposable syringe and method of producing the same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The formulas adopted in the following examples are the formulas in the above-mentioned Table 1 and Table 2. Embodiment 1 Syringe jacket injection molding method

[0050]Using the degradable base material of formula 1 or formula 2, the injection molding method of the syringe jacket 4 is as follows:

[0051] 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.

[0052] 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;

[0053] Mold temperature: 30°C,

[0054] The injection pressure is: 110MPa,

[0055] Injection time: 16 seconds,

[0056] The holding time is: 3.0 seconds,

[0057] The screw speed is: 40 rpm,

[0058] The syringe jacket 4 ado...

Embodiment 2

[0059] Embodiment 2 Syringe jacket 4 injection molding method

[0060] Using the degradable base material of formula 3, the injection molding method of the syringe jacket 4 is as follows:

[0061] 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.

[0062] 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;

[0063] Mold temperature: 30°C,

[0064] The injection pressure is: 100MPa,

[0065] Injection time: 14 seconds,

[0066] The holding time is: 2.6 seconds,

[0067] The screw speed is: 30 rpm,

[0068] A syringe jacket 4 using the degradable base material of formula 3 was obtained.

Embodiment 3

[0069] Embodiment 3 Injection molding method of syringe needle seat 2

[0070] Using the degradable base material of formula 1 or formula 2, the injection molding method of the syringe needle seat 2 is as follows:

[0071] 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.

[0072] The second step of injection molding: Add the dried pellets of the degradable base material syringe jacket of formula 1 or formula 2 to the injection molding machine for injection molding. 180°C, metering section 185°C, nozzle 170°C;

[0073] Mold temperature: 30°C,

[0074] The injection pressure is: 95MPa,

[0075] Injection time: 8.5 seconds,

[0076] The holding time is: 1.6 seconds,

[0077] The screw speed is: 35 rpm,

[0078] 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 degradation disposable syringe and a method of preparing the syringe. The syringe includes an outer cover, a core pin, a needle seat and a needle cap, which can be degraded in the natural environment. The basic material for degradation is prepared with degradable polymer main material, plasticizer, stabilizer, stabilizing additive and filling compound, etc. The detailed injection molding process for all parts of the syringe is: the injection temperature for a feeding opening is 20 to 60 DEG C; the injection temperature for a compression section is 100 to 200 DEG C; the injection temperature for a measurement section is 130 to 240 DEG C; the injection temperature for a spray nozzle is 130 to 220 DEG C; the mold temperature is 20 to 50 DEG C; the injection pressure is 40 to 200MPa; the injection time is 8 to 90 seconds; the pressure holding time is 0 to 5 seconds; the screw speed is 20 to 180 r/m; all performances of the degradation syringe totally meet the national standard (GB15810-2001). After being abandoned, the syringe does not pollute the environment, prevents illegal recycling, and can totally replace the disposable polyolefin syringes.

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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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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