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Polylactic acid bio-based special material for disposable syringe

A polylactic acid and syringe technology, applied in the field of biodegradable materials, can solve the problems of migration and precipitation of plasticizers, achieve good transparency, improve heat resistance, and improve toughness

Inactive Publication Date: 2016-06-01
江苏金扬子包装科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention adopts biodegradable VAc-VL copolymer to toughen and modify PLA, while maintaining the transparency and biodegradability of PLA, improves the toughness, melt strength and processing stability of PLA, and solves the problem of polylactic acid crystallization after plasticization. In addition, combined with transparent crystallization nucleation technology, the melt crystallization rate of VAc-VL copolymer modified PLA is controlled, and the size of spherulites is controlled to meet the transparency and heat resistance of bio-based disposable syringes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Add 5 parts of vinyl acetate-vinyl laurate copolymer and 0.1 part of N,N'-dicyclohexyl-2,6-naphthalene to every 100 parts by weight of polylactic acid (Ingeo? 3051D from NatureWorks Company) Diformamide and 0.2 parts of antioxidant 1010 are placed in a high-mixer and mixed evenly, and then the mixture is melted and blended by a parallel co-rotating twin-screw extruder for extrusion modification. 145°C, 155°C, 165°C, 175°C, 185°C, 185°C and 175°C in sequence, the screw speed is 100rpm. After the prepared modified material was dried, it was injection-molded into samples on an injection molding machine in a 100,000-class purification workshop. The injection temperature was 180°C, the injection pressure was 60MPa, the mold temperature was 110°C, and the holding time was 40s. The obtained product has uniform color and good appearance, tensile strength of 55.3MPa, elongation at break of 75.5%, light transmittance of 84.2%, heat distortion temperature of 68.2°C, and...

Embodiment 2

[0013] Example 2: Add 10 parts of vinyl acetate-vinyl laurate copolymer and 0.3 parts of N,N'-dicyclohexyl-2,6-naphthalene to every 100 parts by weight of polylactic acid (Ingeo? 3051D from NatureWorks Company) Diformamide and 0.4 parts of antioxidant 1010 are placed in a high-mixer and mixed evenly, and then the mixture is modified by melt blending and reaction extrusion of a parallel co-rotating twin-screw extruder. The temperature in zones 1 to 7 of the extruder 145°C, 155°C, 165°C, 175°C, 185°C, 185°C and 175°C in sequence, the screw speed is 100rpm. After the prepared modified material was dried, it was injection-molded into samples on an injection molding machine in a 100,000-class purification workshop. The injection temperature was 180°C, the injection pressure was 60MPa, the mold temperature was 110°C, and the holding time was 40s. The obtained product has uniform color and good appearance, tensile strength of 50.9MPa, elongation at break of 115.2%, light transmittanc...

Embodiment 3

[0014] Example 3: Add 15 parts of vinyl acetate-vinyl laurate copolymer and 0.5 parts of N,N'-dicyclohexyl-2,6-naphthalene to every 100 parts by weight of polylactic acid (Ingeo? 3051D from NatureWorks Company) Diformamide and 0.5 parts of antioxidant 1010 are placed in a high-mixer and mixed evenly, and then the mixture is melt-blended and modified by a parallel co-rotating twin-screw extruder, and the temperature in zones 1-7 of the extruder is 145°C, 155°C, 165°C, 175°C, 185°C, 185°C and 175°C in sequence, the screw speed is 100rpm. After the prepared modified material was dried, it was injection-molded into samples on an injection molding machine in a 100,000-class purification workshop. The injection temperature was 180°C, the injection pressure was 60MPa, the mold temperature was 110°C, and the holding time was 40s. The obtained product has uniform color and good appearance, tensile strength of 55.3MPa, elongation at break of 130.6%, light transmittance of 80.4%, heat di...

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Abstract

The invention discloses a polylactic acid bio-based special material for a disposable syringe. The polylactic acid bio-based special material is prepared from, by weight, 100 parts of polylactic acid (PLA), 5-30 parts of toughening agent, 0.1-2 parts of nucleating agent and 0.1-0.5 part of antioxidant. A degradable material vinyl acetate and vinyl laurate copolymer (VAc-VL) is adopted as the toughening agent, and N,N'-dicyclohexyl-2,6-naphthalenedicarboxamide (TMB-5000) is adopted as the nucleating agent. According to the polylactic acid bio-based special material for the disposable syringe, transparent crystallization nucleation and reaction blending modification technologies are adopted, the polylactic acid bio-based special material which is uniform in microstructure, friendly to environment, high in size stability, good in transparency, resistant to high temperature and capable of meeting the national standard GB15810-2001 for the disposable syringe is developed out, the polylactic acid bio-based special material is suitable for manufacturing the disposable syringes through precise injection molding, and important significance to solving of the white pollution caused by disposable medical products is achieved.

Description

technical field [0001] The invention belongs to the field of biodegradable materials, specifically a modified polylactic acid bio-based medical degradable composite material, which can improve the toughness, crystallization performance and heat resistance of polylactic acid, and has good light transmission It is specially designed for the production of disposable bio-based medical degradable syringes. Background technique [0002] At present, the substrates of disposable syringes are generally made of petroleum-based non-degradable plastics such as polypropylene (PP), high-density polyethylene (HDPE) or polyvinyl chloride (PVC), but decades of clinical practice have proved that petroleum-based plastics There are many problems with manufactured single-use medical plastic devices. The materials for this kind of syringes all come from non-renewable resource petroleum, which cannot be degraded by themselves after being discarded, polluting the environment and endangering human ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L31/04C08K5/134C08K5/20
CPCC08L67/04C08L2201/06C08L2201/08C08L2203/02C08L2205/24
Inventor 赵京东陈俊明邹俊
Owner 江苏金扬子包装科技有限公司
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