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Medical antibacterial EVA foam plastic and preparation method thereof

A technology of foam plastics and raw materials, applied in the field of new medical materials technology, can solve the problems of Staphylococcus aureus antibacterial rate, low tear strength and elongation at break

Inactive Publication Date: 2015-03-25
SUZHOU BEC BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present application aims at the above-mentioned technical problems, provides a kind of medical antibacterial EVA foam plastics and preparation method thereof, solves the technical problems such as low antibacterial rate of Escherichia coli, staphylococcus aureus, tear strength and elongation at break of existing medical new materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 100 parts of EVA according to the ratio of parts by weight; 0.3 parts of PVA; 2 parts of nano-active zinc oxide; 0.1 part of aluminum powder; 5 parts of POE; 5 parts of silicone oil; 1 part of EAA; 5 parts of barium metaborate; 2.5 parts of borate surface treatment agent; 10 parts of PA6; 5 parts of LLDPE; 1 part of PA66; 1.5 parts of talcum powder.

[0023] Put EVA, PVA, nano-active zinc oxide, aluminum powder and barium metaborate into the reaction kettle and heat to 80°C, stir for 10 minutes at a stirring speed of 200 rpm, then add the remaining raw materials, heat up to 110°C, stir for 4 hours, and stir at a speed of 200 rpm. 400 rpm.

[0024] Put the mixed material into the twin-screw extruder, the barrel temperature is 150°C, 160°C, 170°C, 185°C, 195°C, 205°C and 210°C, the screw speed is 80 rpm, extrusion granulation, granulation The material was dried at 60°C.

[0025] The relative density of the product is reduced by 14%, and the elongation at break is ...

Embodiment 2

[0027] Weigh 100 parts of EVA; 0.7 parts of PVA; 8 parts of nano-active zinc oxide; 2 parts of aluminum powder; 25 parts of POE; 0.8 parts of organosiloxane; 15 parts of silicone oil; 20 parts of EAA; 25 parts of barium metaborate; 4.5 parts of silane surface treatment agent; 30 parts of PA6; 15 parts of LLDPE; 10 parts of PA66; 3.5 parts of talcum powder.

[0028] Put EVA, PVA, nano-active zinc oxide, aluminum powder and barium metaborate into the reaction kettle and heat to 100°C, stir for 30 minutes at a stirring speed of 600 rpm, then add the remaining raw materials, heat up to 130°C, stir for 8 hours, and stir at a speed of 600 rpm. 600 rpm.

[0029] Put the mixed material into a twin-screw extruder, the barrel temperature is 150°C, 160°C, 170°C, 185°C, 195°C, 205°C and 210°C, the screw speed is 120 rpm, extrusion granulation, granulation Dry the material at 80°C.

[0030] The relative density of the product is reduced by 15%, and the elongation at break is increased by...

Embodiment 3

[0032] Weigh 100 parts of EVA; 0.4 parts of PVA; 3 parts of nano-active zinc oxide; 0.5 parts of aluminum powder; 10 parts of POE; 0.3 parts of organosiloxane; 8 parts of silicone oil; 5 parts of EAA; 10 parts of barium metaborate; 3 parts of silane surface treatment agent; 15 parts of PA6; 7 parts of LLDPE; 4 parts of PA66; 2 parts of talcum powder.

[0033] Put EVA, PVA, nano-active zinc oxide, aluminum powder and barium metaborate into the reaction kettle and heat to 85°C, stir for 15 minutes at a stirring speed of 300 rpm, then add the remaining raw materials, heat up to 115°C, stir for 5 hours, and stir at a speed of 300 rpm. 450 rpm.

[0034] Put the mixed material into the twin-screw extruder, the barrel temperature is 150°C, 160°C, 170°C, 185°C, 195°C, 205°C and 210°C, the screw speed is 90 rpm, extrusion granulation, granulation The material was dried at 65°C.

[0035] The relative density of the product is reduced by 16%, and the elongation at break is increased by...

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Abstract

The invention discloses a medical antibacterial EVA foam plastic and a preparation method thereof. The EVA foam plastic is prepared through the following steps: weighing the following components: EVA, PVA, nanometer activated zinc oxide, aluminum powder, POE, organic siloxane, an antioxidant, methyl phenyl silicone oil, EAA, barium metaborate, a surface treating agent, PA6, LLDPE, PA66 and talcum powder in parts by weight, uniformly mixing the weighed components, and extruding and pelleting the uniformly-mixed components so as to obtain the EVA foam plastic. The EVA foam plastic has the advantages that the relative density is reduced by 14-18%, the breaking elongation rate is increased by 50-90%, the antibacterial rate for escherichia coli is 99.5-99.9%, the antibacterial rate for golden staphylococcus is 99.5-99.9%, the tear strength is improved by 30-40%, the tensile strength is 22-28 MPa, the falling ball impact strength is 47-53 MPa / mm, and the vicat softening point is 80-100 DEG C.

Description

technical field [0001] The application belongs to the technical field of new medical materials, and in particular relates to a medical antibacterial EVA foam plastic and a preparation method thereof. Background technique [0002] Biomedical materials refer to a class of materials with special properties and special functions, which are used for artificial organs, surgical repair, physiotherapy rehabilitation, diagnosis and treatment of diseases, and do not have adverse effects on human tissues. Now various synthetic materials and natural polymer materials, metal and alloy materials, ceramic and carbon materials, and various composite materials, the products made of them have been widely used in clinical and scientific research. With the development of biotechnology, scientists from different disciplines have cooperated extensively, so that the manufacture of artificial organs with complete biological functions has shown a bright prospect. Research on medical polymer materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L77/06C08L77/02C08L83/04C08K13/02C08K3/22C08K3/34C08K3/38C08K3/08B29C47/92B29C48/92
CPCC08L23/0853B29C48/92B29C2948/9259B29C2948/92704C08L2205/035C08L29/04C08L23/0815C08L83/04C08L23/0869C08L77/02C08L77/06C08K13/02C08K2003/2296C08K2003/0812C08K5/541C08K3/38C08K3/34
Inventor 徐勤霞李苏杨
Owner SUZHOU BEC BIOLOGICAL TECH
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