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Preparation method of antibacterial weather-resistant PE/PP plastics

A plastic and weather-resistant technology, which is applied in the field of antibacterial and weather-resistant PE/PP plastic preparation, can solve the problems of polypropylene plastic brittleness, poor impact resistance, single plastic variety, poor heat resistance, etc., and achieve strong heat resistance and enhanced antibacterial performance , good heat resistance

Inactive Publication Date: 2018-10-19
汪向喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor heat resistance and easy aging of traditional polyethylene plastics, poor brittleness and low-temperature impact resistance of polypropylene plastics, and single types of plastics, the invention provides a preparation method of antibacterial and weather-resistant PE / PP plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing antibacterial and weather-resistant PE / PP plastic, which is characterized in that it comprises the following steps:

[0021] (1) After adding citric acid 1.5 times the content of silver nitrate to 0.02mol / L silver nitrate solution, slowly dripping 0.2mol / L sodium borohydride solution, and react for hours at room temperature at 500-700rpm / min stirring speed After the solution was concentrated under reduced pressure, the concentrated solution was washed 2-3 times with water, and then freeze-dried to obtain silver nanoparticles;

[0022] (2) After mixing 97 parts of polyethylene, 0.5 parts of silver nanoparticles, and 2.5 parts of nano-silica uniformly, the screw rod temperature range of the co-extruder is 150-170℃, the head temperature is 160℃, and the main engine speed is The antibacterial polyethylene masterbatch is prepared by an injection molding machine under the condition of 100-rpm / min;

[0023] (3) After mixing 60 parts of antibacterial polyethyle...

Embodiment 2

[0026] A method for preparing antibacterial and weather-resistant PE / PP plastic, which is characterized in that it comprises the following steps:

[0027] (1) After adding citric acid with twice the content of silver nitrate to 0.015mol / L silver nitrate solution, slowly dripping 0.25mol / L sodium borohydride solution, and reacting for hours at room temperature at 500-700rpm / min stirring speed After the solution was concentrated under reduced pressure, the concentrated solution was washed 2-3 times with water, and then freeze-dried to obtain silver nanoparticles;

[0028] (2) After mixing 97 parts of polyethylene, 1 part of silver nano particles, and 2 parts of nano silica, the screw rod temperature range of the co-extruder is 150-170℃, the head temperature is 170℃, and the main engine speed is The antibacterial polyethylene masterbatch is prepared by the injection molding machine under the condition of 150rpm / min;

[0029] (3) 62 parts of antibacterial polyethylene masterbatch, 36.3 ...

Embodiment 3

[0032] A method for preparing antibacterial and weather-resistant PE / PP plastic, which is characterized in that it comprises the following steps:

[0033] (1) After adding citric acid with twice the content of silver nitrate to 0.025mol / L silver nitrate solution, slowly drip 0.2mol / L sodium borohydride solution, and react for hours at room temperature at 500-700rpm / min stirring speed After the solution was concentrated under reduced pressure, the concentrated solution was washed 2-3 times with water, and then freeze-dried to obtain silver nanoparticles;

[0034] (2) After mixing 96.5 parts of polyethylene, 1 part of silver nano particles, and 2.5 parts of nano silica, the screw rod temperature range of the co-extruder is 150-170℃, the head temperature is 160℃, and the main engine speed is The antibacterial polyethylene masterbatch is prepared by the injection molding machine under the condition of 150rpm / min;

[0035] (3) 55 parts of antibacterial polyethylene masterbatch, 43.8 part...

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Abstract

The invention relates to a preparation method of antibacterial weather-resistant PE / PP plastics. According to the preparation method, firstly, a silver nitrate reduction method is used for preparing antibacterial sliver nanometer particles; then, polyethylene, silver nanometer particles and nanometer silicon dioxide are mixed; an injection molding machine is used for preparing antibacterial polyethylene masterbatch; finally, the antibacterial polyethylene masterbatch, polypropylene, silver nanometer particles, natural antioxidants and ultraviolet absorbents are mixed; melting is performed; after the injection, cooling and sterilization, the heat-resistant antibacterial anti-tendering PE / PP plastics are obtained through preparation. The plastics prepared by the method have the advantages ofgood heat resistant performance, strong anti-impact performance, difficult aging and good antibacterial effects.

Description

Technical field [0001] The invention relates to the technical field of plastic preparation, in particular to a preparation method of antibacterial and weather-resistant PE / PP plastic. Background technique [0002] Plastic has the advantages of wide application, good formability and low price, and has been widely used. However, plastics have serious long-term aging and single functions, and general plastics have poor heat-resistant and antibacterial effects. Therefore, the development of functional plastics will have a huge market prospect. [0003] At present, the plastic containers on the market are mainly composed of thermoplastics such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylic blue-butadiene-styrene copolymers. manufacture. Among such plastics, polypropylene (PP) has the advantages of small specific gravity, outstanding stress crack resistance and wear resistance, better heat resistance and chemical stability, but it has p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08K13/02C08K3/08C08K3/36C08K5/00C08K5/132C08K5/3475C08K5/5399
CPCC08K2003/0806C08K2201/011C08L23/06C08L2201/08C08L2205/02C08L23/12C08K13/02C08K3/08C08K3/36C08K5/005C08K5/132C08K5/3475C08K5/5399
Inventor 汪向喜
Owner 汪向喜
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