Unlock instant, AI-driven research and patent intelligence for your innovation.

Composite preservative film containing polylactic acid, and preparation method thereof

A composite fresh-keeping and polylactic acid technology, applied in the field of fresh-keeping, can solve the problems of difficult fresh-keeping, high use cost and high price of fresh food, and achieve the effects of improving the fresh-keeping period, high porosity and small pore size

Inactive Publication Date: 2020-12-04
安徽同光邦飞生物科技有限公司
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It is difficult to keep fresh food fresh, and the existing fresh-keeping methods are mostly controlled atmosphere, freezing, and cold storage
These common fresh-keeping methods need to invest in expensive equipment, so the cost of use is relatively high, and strict cold chain conditions are required in storage and transportation
If you use general packaging materials and methods for storage, transportation and sales at room temperature, it will deteriorate immediately.
Especially the bagged and bottled packages that are common at present are not only easy to rot, but also have serious bag swelling and top cover phenomenon in bagged and bottled packages.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite preservative film containing polylactic acid, and preparation method thereof
  • Composite preservative film containing polylactic acid, and preparation method thereof
  • Composite preservative film containing polylactic acid, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of a composite plastic wrap comprising polylactic acid,

[0023] 1. Preparation of outer layer particles (titanium dioxide modified polylactic acid layer):

[0024] Pour 4kg of polylactic acid, 0.4kg of titanium dioxide, 0.1kg of sulfur dioxide, 0.8kg of n-butyl acetyl citrate, and 0.1kg of calcium stearate into a mixing machine, disperse and mix at 1000rpm for 1 hour, and dry in an oven at 50°C for 3 Hours, the mixed material is granulated in a twin-screw extrusion granulator, the temperature of the granulator is 120-180°C, the temperature of the head is 160°C, the screw speed is 200rpm, and processed into pellets with a diameter of 1-3mm;

[0025] 2. Preparation of inner layer particles (polycaprolactone-chitosan-tea polyphenol composite material layer):

[0026] Pour 4kg of polycaprolactone, 1kg of chitosan, 0.3kg of tea polyphenols, 0.8kg of acetyl-n-butyl citrate, and 0.1kg of calcium stearate into a mixing machine, disperse and mix at 1000rpm...

Embodiment 2

[0030] The difference between this example and example 1 is that "in this example, 1, the amount of polylactic acid added in the preparation of the outer layer particles (titanium dioxide-modified polylactic acid layer) is 4.5kg." Other places are the same as example 1 exactly the same.

Embodiment 3

[0032] The difference between this embodiment and Example 1 is that "in this embodiment, 1, the amount of polylactic acid added in the preparation of the outer layer particles (titanium dioxide-modified polylactic acid layer) is 5kg", and other places are the same as in Example 1 exactly the same.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of preservation, and particularly relates to a composite preservative film containing polylactic acid. The composite preservative film comprises a two-layer structure, the outer layer of the composite preservative film is a polylactic acid layer modified with titanium dioxide, and the inner layer of the composite preservative film is a polycaprolactone-chitosan-tea polyphenol composite material layer. The composite preservative film containing polylactic acid has the beneficial effects that 1, the composite preservative film containing polylactic acid solves the problem of packaging fresh-keeping of some fresh foods, such as juicy peaches, and the fresh-keeping period of the juicy peaches can be greatly prolonged; and 2, after the juicy peacheswhich are not subjected to any treatment are stored for 8 days, the sensory score is 1.3, the fruits are soft, rotten, aggravated in browning and rotten in a large area; after the juicy peaches sold on the market and stored for 8 days, the sensory score is 3.3, the fruits are locally withered, the fruity flavor is lost, and mildewing points exist slightly; and after the juicy peaches adopting thecomposite preservative film disclosed by the invention are stored for 8 days, the sensory score is 4.2, the fruits slightly wither, the color is slightly dark, the fruity flavor is slightly light, andthe juicy peaches are mould-free. The fresh-keeping period of the juicy peaches is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of preservation, and in particular relates to a composite preservation film containing polylactic acid and a preparation method thereof. Background technique [0002] It is difficult to keep fresh food fresh. Most of the existing fresh-keeping methods are controlled atmosphere, freezing and cold storage. These common fresh-keeping methods need to invest in expensive equipment, so the use cost is relatively high, and strict cold chain conditions are required in storage and transportation. If use general packing material and method to carry out storage and transportation and sale at normal temperature, can go bad immediately again. Especially the bagged and bottled packages that are common at present are not only easy to rot, but also have serious swelling bags and top covers in bagged packages and bottled packages. Contents of the invention [0003] In order to solve the above problems, the present invent...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B32B27/36B32B27/08B32B27/18C08L67/04C08K13/02C08K3/22C08K3/30C08L5/08C08K5/1545C08J5/18B29D7/01
CPCB32B27/36B32B27/08B32B27/18C08J5/18B29D7/01C08J2367/04C08J2405/08C08K2003/2241C08K5/1545C08K3/30C08K13/02B32B2307/7145B32B2307/7242B32B2307/728B32B2553/00
Inventor 孙跃军闫静鲍红王秦峰
Owner 安徽同光邦飞生物科技有限公司