Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Application of a longan fresh-keeping paper

A technology of preservative paper and longan, applied in the application, fruit and vegetable preservation, food preservation and other directions, can solve the problems of decreased capacity, increased residues, intensified browning reaction, etc., to extend storage and transportation period and shelf life, prolong storage and transportation and shelf life, the effect of improving market acceptance

Active Publication Date: 2018-03-16
SOUTH CHINA AGRI UNIV
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Release SO slowly in a fresh-keeping bag or plastic wrap 2 During the process, if the long-term low concentration acts, the cell structure will be damaged, which is not enough to inhibit the continuation of oxidation, and even cause the browning reaction to intensify due to the destruction of the cell structure; at the same time, due to the long-term slow release, the fruit will degrade itself SO 2 Capability declines, resulting in SO 2 Accumulates intracellularly, residues may increase substantially
This is also SO 2 During the use of the release agent, the reasons for the aggravated browning and poor fresh-keeping effect caused by insufficient dosage; in addition, SO 2 The gas is heavier than air, and the diffusion in the fruit pile is mainly downward movement, while the upward and surrounding diffusion ability is weak
Use one fresh-keeping bag or multi-point fresh-keeping bags to store some fruits far away from the preservative. Not only will they not get the fresh-keeping effect, but also because the dosage is too low, the browning will aggravate and quickly decay.

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
  • Application of a longan fresh-keeping paper
  • Application of a longan fresh-keeping paper
  • Application of a longan fresh-keeping paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation process of the fresh-keeping paper is as follows: the first layer is ordinary non-woven fabric, and the second layer of acrylic pressure-sensitive adhesive (thickness is 0.01mm) is smeared or sprayed on the first layer. Protect it with special release paper, or spray compound SO immediately 2 Release agent powder (third layer), SO for third layer 2 The release agent powder is made of sodium pyrosulfite as the main release agent and oxalic acid as the release agent (the mass ratio of sodium pyrosulfite to oxalic acid is 1:0.10), mixed and crushed to a size above 200 mesh to make release agent powder, and sprayed evenly on the second layer Top; the fourth layer is made of tea bag non-woven fabric as the sealing material, which is covered on the release agent powder, and pressure is applied, and the sealing material can be bonded to the acrylate through the powder gap. The thickness of the whole fresh-keeping paper is 0.03mm, and the prepared The cling wra...

Embodiment 2

[0032] The experimental method is the same as in Example 1, except that the first layer of the fresh-keeping paper prepared in this embodiment is cotton paper, the second layer is self-adhesive, the third layer uses sodium sulfite as the main release agent, and citric acid It is a release accelerator (the mass ratio of sodium sulfite to citric acid is 1:0.15), and the fourth layer uses environmentally friendly nylon paper as the sealing material. The thickness of the entire fresh-keeping paper is 0.04mm, and the prepared fresh-keeping paper is marked as S2.

Embodiment 3

[0034] The experimental method is the same as in Example 1, except that the first layer of the preservative paper prepared in this embodiment is kraft paper, the second layer is commercially available 3M glue, and the third layer is based on sodium dithionite as the release agent. Malic acid is used as the release agent (the mass ratio of sodium dithionite to malic acid is 1:0.20), the fourth layer is made of vegetable starch paper, and the thickness of the whole fresh-keeping paper is 0.05mm. The prepared fresh-keeping paper marks for S3.

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an application of longan fresh-keeping paper. The longan fresh-keeping paper is formed through sequentially packaging a base material, a coating and loading layer, an SO2 releasing agent and a packaging material, the base material and the packaging material are made of breathable and permeable materials, and the coating and loading layer is selected from an acrylate pressure-sensitive adhesive, a non-setting adhesive and a 3M adhesive; and the SO2 releasing agent is formed through mixing a main release agent with a release accelerant according to a mass ratio of 1:0.10-0.25. When the longan fresh-keeping paper is used, fruits are covered with the fresh-keeping paper, water vapor goes through the packaging material at the top of the fresh-keeping paper and enters the fresh-keeping paper in the fruit fresh-keeping process, the releasing agent absorbs water and then releases SO2, and the density of SO2 is greater than the density of air, so released SO2 sinks, uniformly diffuses in a fruit pile from top to bottom, and is uniformly absorbed by the fruits; and when the fresh-keeping paper is used to carry out fresh keeping, the good fruit rate of fruits stored at 1-5DEG C for 30d is 90-100%, and the shelf life in a 15-25DEG C air conditioning room is 3-5d.

Description

technical field [0001] The invention relates to the technical field of fruit fresh-keeping, and more particularly, relates to the application of longan fresh-keeping paper. Background technique [0002] Longan is one of the four major fruits in the southern subtropical region of my country. In the past two decades, the planting area and output of longan have reached a historically high level. Because longan fruit is sweet in flavor, rich in nutrition and has certain health care functions, it is deeply loved by consumers at home and abroad. However, longan in my country is generally matured in the hot summer season, with strong respiration, difficult to store and transport, easy browning of the pericarp, prominent problem of autolysis of the flesh, and the loss rate after reaching the northern market is as high as 30%. Short, browning of the pericarp occurred in more than ten days, and autolysis of the pulp occurred after more than twenty days. [0003] Domestic existing lon...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B32B5/26B32B5/02B32B27/02B32B27/10B32B27/34B32B29/00B32B29/02A23B7/152
CPCA23B7/152A23V2002/00B32B5/022B32B5/26B32B29/005B32B29/02B32B2250/20B32B2250/26B32B2255/02B32B2255/12B32B2255/26B32B2260/025B32B2262/0261B32B2264/104B32B2264/12B32B2307/724B32B2307/726A23V2200/048A23V2250/02A23V2250/1624A23V2250/1614A23V2250/032A23V2250/044A23V2250/1876A23V2250/16
Inventor 吴振先韩冬梅
Owner SOUTH CHINA AGRI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products