Medical LDPE(low-density polyethylene) antibacterial plastic and preparation method thereof

A technology of antibacterial plastics and raw materials, applied in the field of medical LDPE antibacterial plastics and its preparation, can solve the problems of antibacterial rate, low elongation and tensile strength of Staphylococcus aureus, etc.

Inactive Publication Date: 2015-03-11
SUZHOU BEC BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above technical problems, the present application provides a medical LDPE antibacterial plastic and its preparation method, which solves the technical problems of the existing medical new materials such as low antibacterial rate of Escherichia coli, antibacterial rate of Staphylococcus aureus, low elongation and tensile strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 100 parts of LDPE according to the ratio of parts by weight; 10 parts of magnesium hydroxide powder; 1 part of zinc sorbitol monostearate; 10 parts of sodium aluminate; 60 parts of LLDPE; 5 parts of magnesium sulfate; 5 parts of red phosphorus; 10 parts of EVA 2 parts of chitosan; 0.1 part of antioxidant 2002; 2.5 parts of titanate coupling agent; 3 parts of polybutene; 2 parts of styrene; 0.5 part of zinc stearate; 0.3 part of UV-531.

[0023] Put LDPE, magnesium hydroxide powder, zinc sorbitol monostearate, sodium aluminate and LLDPE into the reaction kettle and heat to 60°C, stir for 30 minutes at a stirring speed of 300 rpm, then add the remaining raw materials and heat up to 100°C , stirred for 40min, and the stirring speed was 200 rpm.

[0024] Put the mixed material into the extruder, barrel temperature 180°C, 195°C, 200°C, 205°C, 220°C, 235°C and 240°C, screw 40mm, L / D 20, compression ratio 3, main motor Power 5.5kW, screw speed 60 rpm, extrusion output 3...

Embodiment 2

[0027] Weigh 100 parts of LDPE according to the ratio of parts by weight; 30 parts of magnesium hydroxide powder; 5 parts of zinc sorbitol monostearate; 30 parts of sodium aluminate; 80 parts of LLDPE; 25 parts of magnesium sulfate; 25 parts of red phosphorus; 8 parts of chitosan; 2 parts of antioxidant 2002; 4.5 parts of titanate coupling agent; 17 parts of polybutene; 6 parts of styrene; 4.5 parts of zinc stearate; 0.7 parts of UV-531.

[0028] Put LDPE, magnesium hydroxide powder, zinc sorbitol monostearate, sodium aluminate and LLDPE into the reaction kettle and heat to 80°C, stir for 50 minutes at a stirring speed of 500 rpm, then add the remaining raw materials and heat up to 120°C , stirred for 60min, and the stirring speed was 600 rpm.

[0029] Put the mixed material into the extruder, barrel temperature 180°C, 195°C, 200°C, 205°C, 220°C, 235°C and 240°C, screw 50mm, L / D 25, compression ratio 5, main motor Power 5.5kW, screw speed 80 rpm, extrusion output 40kg / h, extr...

Embodiment 3

[0032] Take by weighing 100 parts of LDPE according to the ratio of parts by weight; 15 parts of magnesium hydroxide powder; 2 parts of zinc sorbitol monostearate; 15 parts of sodium aluminate; 65 parts of LLDPE; 10 parts of magnesium sulfate; 10 parts of antimony trioxide; 12 parts of EVA; 3 parts of chitosan; 0.5 parts of antioxidant 2002; 3 parts of silane coupling agent; 7 parts of polybutene; 3 parts of styrene; 1.5 parts of zinc stearate; 0.4 parts of UV-531.

[0033] Put LDPE, magnesium hydroxide powder, zinc sorbitol monostearate, sodium aluminate and LLDPE into the reactor and heat to 65°C, stir for 35min at a stirring speed of 350 rpm, then add the remaining raw materials and heat up to 105°C , stirred for 45min, and the stirring speed was 300 rpm.

[0034] Put the mixed material into the extruder, the barrel temperature is 180°C, 195°C, 200°C, 205°C, 220°C, 235°C and 240°C, the screw is 42mm, the L / D is 22, the compression ratio is 3.5, and the main motor The power...

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Abstract

The application discloses medical an LDPE(low-density polyethylene) antibacterial plastic and a preparation method thereof. The method comprises the following steps: weighing materials in parts by weight: LDPE, magnesium hydroxide powder, sorbitol single zinc stearate ester, sodium aluminate, LLDPE(linear low density polyethylene), magnesium sulphate, a fire retardant, EVA(ethylene-vinyl acetate), chitosan, an antioxidant 2002, a coupling agent, polybutylene, styrene, zinc stearate and a UV-531(ultraviolet absorbent); uniformly mixing the materials, and then extruding the mixed materials to make grains so as to obtain the plastic. The longitudinal tensile strength of products is 10-30 MPa, and the lateral tensile strength is 5-25 MPa; the antibacterial rate to enterobacteria is 90-95%, and the antibacterial rate to golden staphylococcocci is 99.5-99.9%; the longitudinal elongation rate is 250-350%, and the lateral elongation rate is 300-500%; the transparency is 85-90%.

Description

technical field [0001] The application belongs to the technical field of new medical materials, and in particular relates to a medical LDPE antibacterial 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. Generally speaking, clinical medicine has the following basic requirements for biomedical materials: non-toxic, non-carcinogenic, non-teratogenic, does not cause mutations in human cells and reaction of tissue cells; good compatibility with human tissues,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L5/08C08L23/20C08K13/02C08K3/22C08K5/1515C08K3/24C08K3/30C08K5/098B29C47/92B29C48/92
CPCC08L23/06B29C48/92B29C2948/9258B29C2948/92704C08L2205/035C08L2207/066C08L23/0815C08L23/0853C08L5/08C08L23/20C08K13/02C08K2003/2224C08K5/1535C08K3/24C08K2003/3063C08K5/098
Inventor 徐勤霞李苏杨
Owner SUZHOU BEC BIOLOGICAL TECH
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