Chaoran Packaging shares with you the structure of the insulated lunch bag . How to improve its insulation effect is as follows:

Insulation bags, as the name suggests, are bags with cold / heat preservation functions, suitable for packaging various temperature-sensitive products such as food, fresh food, and medicine. Also known as ice pack in the industry, it is often used in conjunction with phase change cold storage materials (refrigerants) to achieve the purpose of keeping cold / heat.

Insulation package structure

Insulation packs generally consist of three layers of structures, namely the outer surface layer, the heat insulation interlayer and the inner and inner layers. The outer surface layer is made of Oxford cloth or nylon cloth, which is strong and abrasion-resistant. The heat-insulating interlayer is made of EPE pearl cotton insulation material for cold and heat insulation function. This layer determines the heat insulation efficiency of the heat preservation bag. Cleaning.

Insulation package innovation

At present, there is a large amount of insulation packs in the domestic and foreign markets. Food, fresh produce, and other short-distance cold / heat preservation can use insulation pack devices to solve the problem of heat preservation aging. Compared with thermal insulation devices such as thermal insulation boxes, thermal insulation bags are light and easy to fold, which can save space and reduce costs in transportation and storage. Insufficient thermal insulation time limit of the insulation bag is limited. The currently used pearl cotton material has general heat insulation performance and is not easy to be made too thick. We can consider other aspects to optimize the heat preservation time of the insulation bag. The following are for reference:

1. Material innovation

The most important material is of course the heat insulation layer. At present, pearl cotton is used as the heat insulation medium for the heat insulation layer of domestic thermal insulation packages. Due to the high thermal conductivity of pearl cotton, its thermal insulation efficiency is limited. Foreign SOFRIGAM companies use polyurethane foam as the insulation layer, which greatly improves the insulation duration of the insulation bag. The nano-based thermal insulation material developed by Green Cold Chain Packaging Center replaces pearl cotton, and its thermal insulation performance is comparable to common XPS thermal insulation boxes.

Structural innovation

Starting from the optimization of the insulation bag structure, it is necessary to consider the structural factors that affect the insulation performance of the insulation bag, such as no insulation material at the joints of the adjacent sides of the insulation bag body, and no windproof structure at the zipper of the bag mouth, etc. These parts also generate a lot of air convection Heat exchange results in reduced insulation performance.

Therefore, the structural design of the thermal insulation package can be optimized. An integrated thermal insulation package body design is used. The soft characteristics of the thermal insulation layer are used to reduce the joints and improve the thermal insulation performance. The corresponding tongue windproof structure can be designed around the pocket zipper, and the double-layer protection is provided at the zipper. In addition, when designing the insulation layer structure, a double-layer insulation material filling design can be performed. A first insulation layer is formed between the outer surface layer and the inner layer, and a second insulation layer is formed between the inner and outer layers. Insulation materials such as pearl cotton, environmental protection EVA, wool felt are filled.

In short, the application of thermal insulation packs has involved people's daily life. People can use thermal insulation packs to solve the cold, heat preservation and freshness of food in shopping, picnics and picnics. In the future, the insulation pack industry will pursue more lightweight, convenient, environmentally friendly and efficient. The product.