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Medical antibacterial masterbatch-modified LDPE (Low-Density Polyethylene) and preparation method thereof

An antibacterial masterbatch and modification technology, applied in the field of medical antibacterial masterbatch modified LDPE and its preparation, can solve the problems of low solution flow rate and tensile strength, etc.

Inactive Publication Date: 2015-03-04
SUZHOU BEC BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In response to the above technical problems, this application provides a medical antibacterial masterbatch modified LDPE and its preparation method to solve the problems of low antibacterial rate of Escherichia coli, Staphylococcus aureus, low melt flow rate and tensile strength of existing medical new materials. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take by weight 100 parts of LDPE; 0.2 part of SBS; 3 parts of nano zirconium phosphate silver-loaded antibacterial agent; 15 parts of HDPE; 0.2 part of lead stearate; 5 parts of LLDPE; 0.4 parts of zinc fatty acid; 0.1 parts of 2,6-di-tert-butyl-p-cresol; 3 parts of titanate coupling agent; 30 parts of acetylene carbon black; 0.1 part of DLTP; 25 parts of nickel powder; AC foaming The dosage is 2 parts.

[0023] Put LDPE, SBS, nano zirconium phosphate silver-loaded antibacterial agent, HDPE and lead stearate into the reaction kettle and heat to 80°C, stir for 20min at a stirring speed of 200 rpm, then add the remaining raw materials, heat up to 100°C, and stir for 60min , stirring speed 300 rev / min.

[0024] Put the mixed material into a twin-screw extruder, the barrel temperature is 160°C, 175°C, 190°C, 205°C, 220°C, 235°C and 250°C, the barrel diameter is 65mm, the screw length-to-diameter ratio is 20, and extruded Granulate.

[0025] The tensile strength of the pr...

Embodiment 2

[0027] Take by weight 100 parts of LDPE; 2 parts of SBS; 17 parts of nano zirconium phosphate silver-loaded antibacterial agent; 35 parts of HDPE; 0.8 part of lead stearate; 0.8 parts of zinc; 2 parts of 2,6-di-tert-butyl-p-cresol; 7 parts of titanate coupling agent; 50 parts of acetylene carbon black; 0.5 parts of DLTP; 45 parts of nickel powder; 8 servings.

[0028] Put LDPE, SBS, nano-zirconium phosphate silver-loaded antibacterial agent, HDPE and lead stearate into the reactor and heat to 100°C, stir for 40min at a stirring speed of 300 rpm, then add the remaining raw materials, heat up to 120°C, and stir for 90min , stirring speed 500 rev / min.

[0029] Put the mixed material into a twin-screw extruder, the barrel temperature is 160°C, 175°C, 190°C, 205°C, 220°C, 235°C and 250°C, the barrel diameter is 150mm, the screw length-to-diameter ratio is 26, and extruded Granulate.

[0030] The tensile strength of the product is 30MPa, the elongation at break is 700%; the antib...

Embodiment 3

[0032] Take by weight 100 parts of LDPE; 0.5 part of SBS; 7 parts of nanometer zirconium phosphate silver-loaded antibacterial agent; 20 parts of HDPE; 0.5 parts of zinc fatty acid; 0.5 parts of 2,6-di-tert-butyl-p-cresol; 4 parts of silane coupling agent; 35 parts of acetylene carbon black; 0.2 parts of DLTP; 20 parts of nickel powder; 3 copies.

[0033] Put LDPE, SBS, nano zirconium phosphate silver-loaded antibacterial agent, HDPE and lead stearate into the reaction kettle and heat to 85°C, stir for 25min at a stirring speed of 220 rpm, then add the remaining raw materials, heat up to 105°C, and stir for 70min , stirring speed 350 rpm.

[0034] Put the mixed material into a twin-screw extruder, the barrel temperature is 160°C, 175°C, 190°C, 205°C, 220°C, 235°C and 250°C, the barrel diameter is 80mm, the screw length-to-diameter ratio is 22, and extruded Granulate.

[0035] The tensile strength of the product is 35MPa, the elongation at break is 740%; the antibacterial ra...

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Abstract

The invention discloses a medical antibacterial masterbatch-modified LDPE (Low-Density Polyethylene) and a preparation method thereof. The preparation method comprises the following steps: weighting LDPE, SBS (Styrene Butadiene Styrene), nanometer zirconium phosphate silver-loaded antibacterial agent, HDPE (High-Density Polyethylene), lead stearate, LLDPE (Linear Low-Density Polyethylene), a lubricant, magnesium sulfate, zinc stearate, 2,6-butylated hydroxytoluene, a coupling agent, acetylene black, DLTP (Dilauryl Thiodipropionate), nickel powder and an AC (Activated Charcoal) foaming agent in parts by weight, uniformly mixing, extruding, sheeting and granulating. The product has tensile strength of 25-45MPa and elongation at break of 680-780%, surface tension of (4-8)*10<-4>N / m and right angle tear strength of 105-125kN / m; the antibacterial rate on escherichia coli is 99.4-99.8% and the antibacterial rate on staphylococcus aureus is 99.5-99.9%; the flow rate of a melt is 2.3-2.8g per10 minutes.

Description

technical field [0001] The application belongs to the technical field of new medical materials, and in particular relates to a medical antibacterial masterbatch modified LDPE 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. Medical silicone rubber (silicone rubber) is a biological material (tissue substitute) widely used in cosmetic surgery. It is a rubber-like solid form of high molecular organic compound polysilicone, also known as dimethyl siloxane. With the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L53/02C08L23/08C08K13/06C08K9/12C08K3/08C08K5/098C08K3/30C08K5/13C08K3/04C08J9/10B29C47/92B29C48/92
CPCC08L23/06B29C48/92C08J9/103C08J2323/06C08L2203/02C08L2205/02C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L53/02C08L23/0815C08L91/00C08K13/06C08K9/12C08K5/098C08K2003/3063C08K3/04C08L91/06
Inventor 徐勤霞李苏杨
Owner SUZHOU BEC BIOLOGICAL TECH
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