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Antibacterial food box

A food box, polylactic acid technology, applied in the field of food boxes, can solve the problems of easy deformation, degradation, poor preservation, etc., and achieve the effect of high mechanical strength and high tensile resistance

Inactive Publication Date: 2019-02-01
刘辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although paper food bags are easy to degrade, paper food bags are easily deformed or even degraded when exposed to fluids such as water and oil, thereby contaminating the packed food.
Existing plastic food bags generally use biaxially oriented polypropylene or polylactic acid materials. Although they can meet the requirements of mechanical properties, they have poor antibacterial properties, poor preservation for some special foods, and are not biodegradable. Therefore, it is of great significance to develop a packaging box that can not only guarantee the mechanical properties, but also achieve antibacterial and biodegradable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] An antibacterial food box, in terms of parts by mass, first, weigh 45 parts of polylactic acid, 10 parts of graphene, 14 parts of chitosan, 14 parts of polyvinyl alcohol, 11 parts of starch, and 6 parts of calcium carbonate for later use. Then, add the polylactic acid into the mixer and heat and stir, the stirring speed is 1500rad / min, the heating temperature is 70°C, after stirring for 5min, add the weighed starch, graphene, chitosan, calcium carbonate and polyethylene in turn Alcohol, after being mixed evenly, a mixture is formed. Next, add the mixture into the extruder, and control the temperature of the extruder to 200-220°C, wherein the heating section of the extruder is divided into 4 zones, the temperature of the first zone is 205°C, and the temperature of the second zone is 210°C. °C, the temperature in the third zone is 215°C, and the temperature in the fourth zone is 220°C. After 30 minutes, the molten material is extruded through the extruder, dragged and coo...

Embodiment 2

[0016] An antibacterial food box, in terms of parts by mass, first, weigh 40 parts of polylactic acid, 12 parts of graphene, 16 parts of chitosan, 12 parts of polyvinyl alcohol, 12 parts of starch, and 8 parts of calcium carbonate for later use. Then, add the polylactic acid into the mixer and heat and stir, the stirring speed is 1360rad / min, the heating temperature is 75°C, after stirring for 8min, add the weighed starch, graphene, chitosan, calcium carbonate and polyethylene in turn Alcohol, after being mixed evenly, a mixture is formed. Next, add the mixture into the extruder, and control the temperature of the extruder to 200-220°C, wherein the heating section of the extruder is divided into 4 zones, the temperature of the first zone is 205°C, and the temperature of the second zone is 210°C. °C, the temperature in the third zone is 215°C, and the temperature in the fourth zone is 220°C. After 30 minutes, the molten material is extruded through the extruder, dragged and coo...

Embodiment 3

[0018] An antibacterial food box, in terms of parts by mass, first, weigh 50 parts of polylactic acid, 8 parts of graphene, 12 parts of chitosan, 10 parts of polyvinyl alcohol, 14 parts of starch, and 6 parts of calcium carbonate for later use. Then, add the polylactic acid into the mixer and heat and stir, the stirring speed is 1200rad / min, the heating temperature is 80°C, after stirring for 10min, add the weighed starch, graphene, chitosan, calcium carbonate and polyethylene in turn Alcohol, after being mixed evenly, a mixture is formed. Next, add the mixture into the extruder, and control the temperature of the extruder to 200-220°C, wherein the heating section of the extruder is divided into 4 zones, the temperature of the first zone is 205°C, and the temperature of the second zone is 210°C. °C, the temperature in the third zone is 215°C, the temperature in the fourth zone is 220°C, and the temperature in the fifth zone is 220°C. After 30 minutes, the melt is extruded thro...

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PUM

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Abstract

The invention discloses an antibacterial food box, which can be used as a lunch box. According to the invention, polylactic acid, graphene, chitosan, polyvinyl alcohol, starch and calcium carbonate are respectively weighed, and sequentially added to the extruder, wherein the temperature of the extruder is controlled to be 200-220 DEG C, after 30 minutes, a melt is extruded through the extruder, drawn and cooled, and cut to form an extrudate, and the extrudate is injected into an injection molding machine for injection moulding to form the food box. The food box prepared by the invention not only has biodegradability, but also has high mechanical strength and tensile strength, has antibiosis and bacteriostasis effects, and is safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of food boxes, in particular to an antibacterial food box. Background technique [0002] The food box is in direct contact with the packaged food, and it has been widely valued because it will affect the safety of the food and then affect the safety of the human body. Food boxes bring great convenience to people in life. According to the classification of materials, they can be divided into plastic food bags and paper food bags. Although paper food bags are easy to degrade, paper food bags are easily deformed or even degraded when exposed to fluids such as water and oil, thereby contaminating the packed food. Existing plastic food bags generally use biaxially oriented polypropylene or polylactic acid materials. Although they can meet the requirements of mechanical properties, they have poor antibacterial properties, poor preservation for some special foods, and are not biodegradable. Therefore, it is of gr...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L5/08C08L29/04C08L3/02C08K3/04C08K3/26B65D65/46
CPCB65D65/466C08K2003/265C08L67/04C08L2201/06C08L2205/035C08L5/08C08L29/04C08L3/02C08K3/042C08K3/26Y02W90/10
Inventor 刘辉
Owner 刘辉
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