Economic rationality is to select the fundamental basis for seal packing materials. The choice of Sealing Material during the sealing, not only to consider the character of a packaged product, but also should consider the value of a packaged product, for the high-end products or products with high added value should be used in price, higher performance sealing packaging materials.

 For affordable products, in addition to aesthetic considerations, but also give more consideration to economy, they use materials should be equal and opposite reaction. Products for lower prices, in ensuring its security, while maintaining its protective function, should focus on benefits of, the choice of lower price sealed packaging.
Sealed packaging materials used should be fully taken into account flow conditions, weather conditions. Flow conditions around a large extent, the choice of packaging materials, flow conditions, including climate, transportation, distribution and circulation cycle, and other objects.

Climatic conditions is sealed packaging material should be adapted to the regional distribution of temperature, humidity, temperature and so on. Seal also depends on the choice of packaging materials is expected to save on packaging, re-open the closed image needs and product requirements. Some properties of packaging materials is known, these properties and data on our great selection of guidance materials. If a sealed package is designed to be used repeatedly, then the flexibility of plastic materials becomes very important, especially for the kind of casting-type pop-up lid and a body especially the hinge cover. The choice of packaging materials and decoration will also directly affect the image of products in the market, so we often have to take into account the effect of decoration materials.

Designers have to consider the environment is also another important factor, to meet the product requirements of the premise, as far as possible use will not cause pollution to the environment, packaging waste easier to handle the material.