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Fresh-keeping container and fresh-keeping method

A technology for fresh-keeping containers and container covers, which is applied to chemical instruments and methods, synthetic resin layered products, and packaging, and can solve problems affecting the fresh-keeping performance of food to be stored, poor air permeability of fresh-keeping containers, and short fresh-keeping period, etc., to achieve Inhibit the reproduction and growth of bacteria, good fresh-keeping performance, and long-term fresh-keeping effect

Active Publication Date: 2013-06-26
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing fresh-keeping containers are usually kept fresh at room temperature by utilizing the heat insulation performance of the fresh-keeping container material itself. If it encounters summer and the climate is hot, it is extremely easy to cause corrosion and lose its original flavor. Therefore, the fresh-keeping period is not long
In order to prolong the fresh-keeping period, some fresh-keeping containers with good thermal insulation performance of the container itself have also been developed in the prior art, such as fresh-keeping containers made of ceramics as materials, but the air permeability of this type of fresh-keeping containers is relatively poor, and there is also a certain To a certain extent, it affects the fresh-keeping performance of the food to be stored

Method used

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  • Fresh-keeping container and fresh-keeping method

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0063] This example is used to illustrate the preparation of the waterproof and breathable particles provided by the present invention.

[0064] Heat 100 grams of quartz sand with an average particle diameter of 0.25mm to 50°C, then add 5 grams of liquid polyvinyl alcohol tert-butyraldehyde modified epoxy resin, stir well, then add 1 gram of polyamide curing agent, and stir evenly. The epoxy resin is coated on the surface of the quartz sand; then, cooled to room temperature, crushed and sieved to obtain waterproof and air-permeable particles, calculated by weighing method, based on the total weight of the waterproof and air-permeable particles, The content of the coating layer was 6% by weight.

preparation Embodiment 2

[0066] This example is used to illustrate the preparation of the waterproof and breathable particles provided by the present invention.

[0067] Heat 100 grams of ceramsite with an average particle diameter of 0.23mm to 50°C, then add 4 grams of silicone resin, stir thoroughly, then add 0.5 grams of dibutyltin dilaurate curing agent, and stir evenly to make the silicone resin Coating on the surface of quartz sand particles; then, cooling to room temperature, crushing and sieving to obtain waterproof and air-permeable particles, by weighing method, calculate, based on the total weight of waterproof and air-permeable particles, the content of the coating layer of hydrophobic substances is 4.3% by weight.

preparation Embodiment 3

[0069] This example is used to illustrate the preparation of the waterproof and breathable particles provided by the present invention.

[0070] Mix 50 grams of quartz sand with an average particle diameter of 0.25 mm and 50 grams of glass microspheres with an average particle diameter of 0.31 mm and heat to 50 ° C. After that, add 2 grams of liquid polyurethane resin, stir well, and then add TDI trimer 0.2 grams of solid curing agent, stir evenly, so that polyurethane resin is coated on the surface of quartz sand and glass beads; then, cool to room temperature, break and sieve to obtain waterproof and breathable particles. Based on the total weight of the granules, the content of the hydrophobic substance coating is 2.2% by weight.

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Abstract

The invention provides a fresh-keeping container and a fresh-keeping method. A main body of the fresh-keeping container is in a dual-layer structure. A cavity for containing heat-insulating materials is formed between an inner layer and an outer layer. The inner layer and the outer layer of the fresh-keeping container and a container cover are all formed by waterproof air permeable particles and hydrophobic bonding agents in a bonding mode. A pore is formed between adjacent waterproof and air permeable particles, and the pore allows a gaseous state molecule to pass through and prevents a liquid water molecule from passing through. The heat-insulating materials comprise one or more of hydrophilic light puffing material, light thermal insulation foaming particles or natural sand. According to the fresh-keeping container and the fresh-keeping method, the main body of the fresh-keeping container is in the dual-layer structure comprising the inner layer and the outer layer, the cavity capable of containing the heat-insulating material is formed between the inner layer and the outer layer, the heat-insulating material is used so that a low-temperature state of the fresh-keeping container is effectively ensured, and breeding and growing of bacteria can be effectively restrained, and therefore a cooling function and a fresh-keeping function are achieved.

Description

technical field [0001] The invention belongs to the field of food fresh-keeping, and in particular relates to a fresh-keeping container and a method for using the fresh-keeping container to keep food fresh. Background technique [0002] With the improvement of people's living standards, residents put forward higher requirements for the freshness of food, especially vegetables, fruits and meat, and simple fresh-keeping containers widely used for food preservation have become a must for people's daily use at home. It is not only convenient and practical, but also can store food in different categories. Most of the existing daily fresh-keeping containers are dense and uniform films made of polyethylene homopolymer, which have good transparency, mechanical properties, toughness and elasticity, and are impermeable to gas and water vapor, which can well prevent water vapor The distribution can play a certain fresh-keeping effect. However, the existing fresh-keeping containers ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D81/36B32B27/08
Inventor 秦升益张丹丹
Owner BEIJING RECHSAND SCI & TECH GRP
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