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High-efficiency electron beam irradiation-resistant composite polypropylene material

An electron beam irradiation and composite material technology, which is applied in the field of medical radiation-resistant polypropylene composite materials, can solve the problems of limited effect, fast cycle, short electron beam irradiation wavelength, etc.

Active Publication Date: 2015-02-25
上海新上化高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antioxidants improve the radiation resistance of materials by inhibiting the oxidative degradation of materials. UV absorbers delay the degradation of materials by absorbing the energy of light in a certain band, but most of the absorption bands are located in the ultraviolet region, but for the near-ultraviolet region with shorter wavelengths And shorter wavelength gamma rays, X-rays, electron beams, etc., the effect of protecting polypropylene materials is not good
Electron beam irradiation has a short wavelength and a fast cycle, and the effects of both are relatively limited

Method used

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  • High-efficiency electron beam irradiation-resistant composite polypropylene material
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  • High-efficiency electron beam irradiation-resistant composite polypropylene material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]

[0039]

[0040] Randomly copolymerized polypropylene powder, toughening agent POE, radiation resistance additive, antioxidant 264, transparent nucleating agent bis(3,4 dimethylbenzylidene) sorbitol, calcium stearate and Oleamide was added to a high speed mixer and mixed for 5 minutes to obtain a premixed resin. Then add the premixed resin to the twin-screw for melt blending and extrusion. The temperature of each zone of the extruder is set as follows: the temperature from the feeding section to the die is 130-215°C, the temperature of the head and the die is 220°C, and the screw speed of the main engine It is 200r / min. The blend is extruded through a die, cooled, and granulated to obtain a polypropylene composite material. The obtained materials were tested for physical properties, chemical properties, and biological properties, and the results are listed in Table 1.

Embodiment 2

[0042]

[0043]

[0044]Randomly copolymerized polypropylene powder, toughening agent POE, radiation resistance additive, antioxidant, transparent nucleating agent bis(3,4 dimethylbenzylidene) sorbitol, calcium stearate and oil The acid amide was added to a high speed mixer and mixed for 5 minutes to obtain a premixed resin. Then add the premixed resin into the twin-screw for melt blending and extrusion. The temperature of each zone of the extruder is set as follows: the temperature from the feeding section to the die is 130-215°C, the temperature of the head and the die is 220°C, and the screw speed of the main engine It is 200r / min. The blend is extruded through a die, cooled, and granulated to obtain a polypropylene composite material. The obtained materials were tested for physical properties, chemical properties, and biological properties, and the results are listed in Table 1.

Embodiment 3

[0046]

[0047] Randomly copolymerized polypropylene powder, toughening agent SEBS, radiation resistance additive, antioxidant 264, transparent nucleating agent bis(3,4 dimethylbenzylidene) sorbitol, calcium stearate and Oleamide was added to a high speed mixer and mixed for 5 minutes to obtain a premixed resin. Then add the premixed resin to the twin-screw for melt blending and extrusion. The temperature of each zone of the extruder is set as follows: the temperature from the feeding section to the die is 135-220°C, the temperature of the head and the die is 225°C, and the screw speed of the main engine It is 200r / min. The blend is extruded through a die, cooled, and granulated to obtain a polypropylene composite material. The obtained materials were tested for physical properties, chemical properties, and biological properties, and the results are listed in Table 1.

[0048] Table 1 Physical properties, chemical properties, biological properties of materials

[0049] ...

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Abstract

The invention discloses a high-efficiency electron beam irradiation-resistant composite polypropylene material which is characterized by taking polypropylene resin as a base material and containing the following components in parts by weight: 0.05-0.3 part of irradiation screening agents and 100 parts of polypropylene resin, wherein the irradiation screening agents are compound mixtures of trans-1,2-diphenyl ethylene oxide and acenaphthylene, and the weight ratio of trans-1,2-diphenyl ethylene oxide to acenaphthylene is 1:(0.2-0.5). The high-efficiency electron beam irradiation-resistant composite polypropylene material disclosed by the invention has yellowing-resistant property, is capable of keeping the molecular transparency and ensuring that the transparency of the material can not be reduced, and can achieve the yellow index less than 1 by reducing the integrated mechanical property of the material within 5% and achieve the yellow index less than 1.3 by being naturally aged at normal temperature for 6 months. According to the prepared medical irradiation-resistant composite polypropylene material, the impact resistant property of a base material is enhanced before and after irradiation; and the physical property, chemical property and biological property can completely meet the requirements of an international YY / T0242-2007 'special material for polypropylene for medical transfusion, blood transfusion and syringes'.

Description

technical field [0001] The invention relates to a medical radiation-resistant polypropylene composite material. Background technique [0002] At present, ethylene oxide is widely used to sterilize medical devices. The advantage of this method is that it can kill all microorganisms. EO does not corrode plastics, metals and rubbers, does not make objects yellow and brittle, and can penetrate different shapes. Regular items can be sterilized, and can be used to sterilize items that cannot be sterilized by soaking in disinfectants, steam and other chemical gases. However, ethylene oxide is a highly flammable, petroleum-based gas, mutagenic and carcinogenic. It not only poses a great safety hazard in the production and processing process, but also pollutes the environment and remains harmful to the human body. Disadvantages such as long cycle time. [0003] The use of electron beam irradiation to sterilize medical devices has the advantages of no pollution, no residue, and a sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/08C08L53/02C08K5/00C08K5/1515C08K5/01C08K5/098C08K5/20B29C47/92B29C48/92
CPCB29C48/92C08L23/14C08L2201/08C08L2203/02C08L2205/02C08L23/0815C08K5/0008C08K5/005C08K5/1515C08K5/01C08L53/02
Inventor 卞俭俭唐艳芳徐晓辉王芹
Owner 上海新上化高分子材料有限公司
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