Grain bags are suitable for any form of nature

The shape element of grain packaging bag is the shape of the product packaging display surface, including the size, size and shape of the display surface. There are three kinds of shapes we see in daily life, namely natural shape, man-made shape and accidental shape. However, when we study the shape composition of products, it is necessary to find a shape suitable for any nature, that is, pull out the common regularity, which is called general shape.

Shape composition is the shape element, or called shape element, which is a variety of ever-changing shapes formed by certain methods and laws. Shape is composed of points, lines, faces and bodies. The shapes of packaging mainly include: cylinder, cuboid, cone and various shapes, as well as the combination of relevant shapes and various shapes formed by different cutting. The novelty of packaging shape composition plays a very important role in customers' visual guidance, and the unique visual shape can leave a deep impression on customers. It is necessary for packaging designers to be familiar with the characteristics of shape elements and their expressions, which can be used as the material to express the beauty of form.

There are many kinds of practical plastic films for packaging. In the application of many plastic films, there are often mutual penetration and mutual substitution, but the characteristics of various plastic films can not be ignored. Therefore, the correct selection and application of plastic packaging film is not easy. This requires the professional personnel of packaging materials to understand some of the corresponding basic functions of plastic packaging film, mainly the product maintenance function, promotion function, adaptability to packaging machinery and other special needs in application.

It is also necessary to consider economic rationality and adaptability to environmental maintenance. The commonly used method to show the barrier of plastic film is to measure the amount of a certain substance per unit area of film at a certain time under a certain temperature and humidity. The barrier of plastic film to aroma. Generally, after the aroma substance is sealed in a film bag, the time required for the aroma to pass through the film bag is measured (the plastic bag is placed in the dryer, opened regularly, and the time when the aroma can be perceived is the aroma retention time). The longer the aroma retention time is, the better the barrier of the film to the aroma.

Food packaging can also reduce the possibility of food being eaten secretly. Some food packages are strong and have anti-counterfeiting marks to protect the interests of businesses from loss. The packaging bag can have laser logo, special color, SMS certification and other labels. Other retailers put electronic monitoring labels on food bags to prevent theft, waiting for customers to take them to the outlet of the store for degaussing. The quality of food packaging bags, especially the hygienic quality, in the flexible packaging industry is directly related to the safety of packaged food. Therefore, it is necessary to ensure that the raw materials and additives used meet the quality requirements.

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