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Preservative film padded with minerals and preparation method thereof

A fresh-keeping film and mineral technology, applied to flexible coverings, containers, sacks, etc., can solve the problems of perishable and aging fruits and vegetables, inappropriate air ratio, poor moisture permeability, etc., achieve good fresh-keeping effect, good moisture permeability, The effect of keeping fresh for a long time

Inactive Publication Date: 2011-11-23
YONG YU TAI TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a mineral-filled fresh-keeping film and its preparation method, which mainly solves the problem that the existing fruit and vegetable fresh-keeping film has poor air permeability, inappropriate air ratio, poor moisture permeability, easy internal condensation, and easy rot and aging of fruits and vegetables. and other issues in order to prolong the shelf life of fruits and vegetables

Method used

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  • Preservative film padded with minerals and preparation method thereof
  • Preservative film padded with minerals and preparation method thereof
  • Preservative film padded with minerals and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Weigh 6 kg of calcined diatomite and 4 kg of calcined kaolin, respectively, and put them into a muffle furnace for calcination respectively. Diatomite is calcined at 700°C for 6 hours, and kaolin is calcined at 850°C for 6 hours to obtain calcined diatom Soil and calcined kaolin;

[0051] (2) Put the above-mentioned calcined diatomite and calcined kaolin into a high-speed kneader, heat to 90-100°C and start stirring, add 0.1 kg of silane coupling agent KH-550, and stir at 90-100°C for 5-10 minutes , drying after discharge to obtain activated composite filler;

[0052] (3) Add 80 kg of low-density polyethylene (LDPE), 20 kg of ethylene-vinyl acetate resin (EVA), and 0.5 kg of stearic acid to the obtained composite filler, and mix all the ingredients evenly with a plastic particle mixer , pelletized on a twin-screw extruder at a temperature of 105°C to 140°C, and then blown into a 30um film by a single-screw extrusion blow molding machine at a temperature of 120°C to...

Embodiment 2

[0054] (1) Weigh 2 kg of calcined diatomite and 10 kg of calcined kaolin, respectively, and put them into a muffle furnace for calcination respectively. Diatomite is calcined at 700°C for 6 hours, and kaolin is calcined at 850°C for 6 hours to obtain calcined diatom Soil and calcined kaolin;

[0055] (2) Put the above-mentioned calcined diatomite and calcined kaolin into a high-speed kneader, heat to 90-100°C and start stirring, add 0.12 kg of silane coupling agent KH-560, and stir at 90-100°C for 5-10 minutes , drying after discharge to obtain activated composite filler;

[0056] (3) 75 kilograms of low-density polyethylene (LDPE), 25 kilograms of ethylene-vinyl acetate resin (EVA), 0.5 kilogram of paraffin, join in the composite filler that obtains, after all ingredients are mixed evenly through plastic particle mixer, in It is pelletized on a twin-screw extruder at a temperature of 105°C to 140°C, and then blown into a 30um film by a single-screw extrusion blow molding mac...

Embodiment 3

[0058](1) Weigh 10 kg of calcined diatomite and 2 kg of calcined kaolin, respectively, and put them into a muffle furnace for calcination respectively. Diatomite is calcined at 700°C for 6 hours, and kaolin is calcined at 850°C for 6 hours to obtain calcined diatom Soil and calcined kaolin;

[0059] (2) Put the above-mentioned calcined diatomite and calcined kaolin into a high-speed kneader, heat to 90-100°C and start stirring, add 0.06 kg of silane coupling agent KH-570, and stir at 90-100°C for 5-10 minutes , drying after discharge to obtain activated composite filler;

[0060] (3) Add 90 kg of low-density polyethylene (LDPE), 10 kg of ethylene-vinyl acetate resin (EVA), and 0.5 kg of polyethylene wax to the obtained composite filler, and mix all the ingredients evenly with a plastic particle mixer , pelletized on a twin-screw extruder at a temperature of 105°C to 140°C, and then blown into a 30um film by a single-screw extrusion blow molding machine at a temperature of 120...

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Abstract

The invention discloses a preservative film padded with minerals and a preparation method thereof. Components for producing the preservative film padded with minerals are as follows in parts by weight: 75-90 parts of low density polyethylene (LDPE), 10-25 parts of ethylene-vinyl acetate resin (EVA), 2-10 parts of calcined diatomite, 2-10 parts of calcined kaolin, coupling agent which accounts for0.5% - 1.5% of the mass sum of the calcined diatomite and the calcined kaolin, and 0.5-1 parts of dispersant. When the preservative film padded with minerals is utilized for storing and preserving various fruits and vegetables, the invention has stable controlled atmosphere index, strong two-way regulating ability of O2 and CO2, strong ability for replacing harmful gas generated by fruit and vegetable supersession, good moisture permeability and uneasy inner dewing, therefore, the preservation time of fruits and vegetables is long, the preservation effect is good, thereby enhancing economic effect of fruits.

Description

technical field [0001] The invention relates to a fresh-keeping film and a preparation method thereof, in particular to a mineral-filled fresh-keeping film and a preparation method thereof. Background technique [0002] After fruits and vegetables are picked, they are still a biological organism during storage, constantly undergoing metabolism and physiological decay, so the preservation of fruits and vegetables is very important. [0003] At present, there are many storage methods. Putting fruits and vegetables into polyethylene film packaging bags and sealing them in a controlled atmosphere storage is the most commonly used method. Due to the poor air permeability of the polyethylene film, the seal of each bag should be opened and vented regularly during the storage period, which increases the labor intensity and makes it difficult to ensure the storage quality. In order to solve this problem, a silicon window preservative film has appeared. Its structure is to open a cer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08K9/06C08K3/34B29C55/28B29C47/92B29B9/06B65D81/24B65D65/38B65D65/02B65D30/02B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/10B29C48/40B29C2948/92895
Inventor 韩永生刘秉镰刘彦平王英佩
Owner YONG YU TAI TIANJIN
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