Fresh-keeping particles used for preparing film or blister sheet and preparation method of particles

A technology of particles and plastic sheets, which is applied in the field of fresh-keeping particles of films or blister sheets, can solve the problems of short shelf life of fresh-keeping films that cannot meet market demand, high cost of fresh-keeping films, difficult to promote, and unsatisfactory fresh-keeping effects, etc., to achieve the purpose of inhibiting bacteria The effect of breeding, prolonging the shelf life and prolonging the shelf life

Pending Publication Date: 2018-09-07
俞锃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, some plastic plastic wraps for fruits and vegetables on the market play a certain role in keeping freshness by adjusting the permeability of oxygen and carbon dioxide. Respiratory function lacks the ability to absorb harmful gases, so its real fresh-keeping effect is not very ideal. Some plastic wraps are difficult to promote due to high cost, and some plastic wraps cannot meet market demand due to their short shelf life.

Method used

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  • Fresh-keeping particles used for preparing film or blister sheet and preparation method of particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take by weighing 35kg natural clinoptilolite powder (particle diameter is 80nm), 8kg ZSM-5 molecular sieve (particle diameter is 80nm), 3kg silicon dioxide (particle diameter is 80nm), 1kg zinc oxide (particle diameter is 80nm), 1kg natural Trehalose (particle size is 100nm), 0.5kg of epoxy silane coupling agent Z6040 is added in the high-speed mixer, 3000r / min high-speed stirring at 110 ℃ for 10 minutes for activation treatment; then add 2kg of calcium stearate, 2.5kg N-phenylmaleimide and 40kg low-density polyethylene resin (LDPE, softening point temperature is 180 ℃) continue to stir for 10 minutes, pour in the twin-screw extruder after mixing evenly, pass through at 180 ℃ temperature After melting and kneading, extrude and granulate through granulation equipment at 210° C., and dry to obtain fresh-keeping granules with a total weight of 93 kg.

[0025] The prepared fresh-keeping particles are mixed with low-density polyethylene resin LDPE according to a weight ratio...

Embodiment 2

[0031] The fresh-keeping particles prepared in Example 1 were mixed with the low-density polyethylene resin LDPE at a weight ratio of 1:8, and melted and blown to obtain a blister sheet. The prepared plastic sheet is made into a fresh-keeping box after being blistered, and the application experiment is done under the same conditions as the ordinary blister box.

[0032] The cherries are divided into two portions, each portion of 2.5 kg, put into a common blister box and a fresh-keeping box of this embodiment respectively, cover the lids, and store at room temperature (15-20° C.). See Table 2 for visual observation and taste taste.

[0033] Table 2 Fresh-keeping status and mouthfeel changes of cherries during fresh-keeping

[0034] Storage time (days)

Embodiment 3

[0036] Take by weighing 30kg natural clinoptilolite powder (particle diameter is 80nm), 7kg ZSM-5 molecular sieve (particle diameter is 80nm), 2kg silicon dioxide (particle diameter is 80nm), 2kg zinc oxide (particle diameter is 80nm), 1.5kg Add natural trehalose (particle size: 100nm), 1kg epoxy silane coupling agent Z6040 into the high-speed mixer, stir in the high-speed mixer at 110°C for 10 minutes for activation treatment, the speed is 3000r / min, and then add 1kg Calcium stearate, 3.5kgN-phenylmaleimide and 30kg low-density polyethylene resin continued to stir for 10 minutes, poured in the twin-screw extruder after mixing uniformly, after melting and kneading at a temperature of 180°C, The granulation equipment extruded and granulated at 220°C, and dried to obtain fresh-keeping granules with a total weight of 78kg.

[0037] The prepared fresh-keeping particles are mixed with the low-density polyethylene resin at a weight ratio of 1:9, melted and blown to obtain a fresh-ke...

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Abstract

The invention discloses fresh-keeping particles used for preparing a film or a blister sheet. The fresh-keeping particles are prepared from the following raw materials in percentages by mass: 30%-45%of carrier resin, 25%-40% of natural zeolite powder, 3%-10% of a ZSM-5 molecular sieve, 1%-5% of silicon dioxide, 1%-3% of zinc oxide, 0.5%-2% of natural trehalose, 0.1%-1.5% of a coupling agent, 2%-6% of a heat stabilizer, and 0.5%-3% of a dispersant. The fresh-keeping particles disclosed by the invention can be added into resin such as PE, PP, PS, EVA and EPS to prepare the fresh-keeping film ora blister sheet product having the function of absorbing harmful gases; and the fresh-keeping film or the blister sheet product prepared from the fresh-keeping particles can continuously and effectively adsorb harmful gases such as ethylene and carbon dioxide generated during storage and transportation of fruits and vegetables, control moisture condensation in a bag, kill and inhibit bacteria, reduce bacterium breeding, inhibit postripeness of the fruits and the vegetables, and can significantly prolong shelf life of the fruits and the vegetables.

Description

technical field [0001] The invention belongs to the technical field of plastic packaging materials, and relates to fresh-keeping particles used for manufacturing films or plastic-absorbing sheets and a preparation method thereof, in particular to fresh-keeping particles used for manufacturing films or plastic-absorbing sheets for packaging fruits and vegetables. Background technique [0002] At present, some plastic plastic wraps for fruits and vegetables on the market play a certain role in keeping freshness by adjusting the permeability of oxygen and carbon dioxide. The respiratory function lacks the ability to absorb harmful gases, so its real fresh-keeping effect is not very ideal. Some plastic wraps are difficult to promote due to high cost, and some plastic wraps cannot meet market demand due to their short shelf life. Contents of the invention [0003] The purpose of the present invention is to provide a fresh-keeping particle and a preparation method thereof for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K13/06C08K9/06C08K7/26C08K3/36C08K7/24C08K3/22C08K5/098C08K5/1545C08J3/22B65D65/38
CPCB65D65/38C08J3/226C08J2323/06C08J2423/06C08K3/36C08K5/098C08K5/1545C08K7/24C08K7/26C08K9/06C08K13/06C08K2003/2296C08K2201/003C08K2201/011
Inventor 张伟霞俞锃
Owner 俞锃
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