Transparent packaging, also known as porous plastic, is mainly made of resin and has numerous voids inside. Its structure resembles the combination of popcorn kernels. There are generally two types: hard and soft. The shape depends on the mold and is usually white. It has common characteristics such as lightweight, waterproof, thermal insulation, and shock absorption, and is particularly suitable for packaging fragile or liquid items. Due to its low thermal conductivity, it is also used for the preservation of fresh fruits and vegetables.

Transparent packaging can be divided into crystalline and amorphous types: crystalline type has an orderly arrangement of internal molecules and tight connections, resulting in good stability, heat resistance, and high strength; On the contrary, the indefinite rule states that the molecular chain arrangement is scattered and the mechanical properties are poor.




The mainstream transparent packaging box products on the market nowadays are generally soft, cheap, and have good elasticity, but most of them are flammable and pose potential fire safety hazards. The new flame-retardant transparent product has added flame-retardant ingredients, which have good fire resistance and greatly expand its application fields. However, due to its high price, its acceptance is not high at present. The development and promotion of this product still need to be strengthened by the fire prevention awareness of merchants.

Plastic is a synthetic polymer compound that can freely change its shape and style. It is a material synthesized or condensed from monomer raw materials, composed of Taiwanese resin and fillers, plasticizers, stabilizers, lubricants, pigments and other additives. Its main component is synthetic resin. The term resin originated from Named after lipids secreted by animals and plants, such as rosin, insect glue, etc. Currently, resin refers to high polymers that have not yet been mixed with various additives. Resin accounts for approximately 40% to 6-100% of the total weight of plastic. The basic properties of plastic packaging boxes are mainly determined by the nature of the resin, but additives also play an important role. Some plastics are essentially composed of synthetic resins with little or no additives, such as organic glass, polystyrene, etc. Therefore, the terms plastic and resin are often used interchangeably.

Plastics can be divided into two categories: thermosetting and thermoplastic. The former cannot be reshaped for use, while the latter can be repeatedly produced. There are basically two types of polymer structures for food tray plastics: the first is linear structure, and polymer compounds with this structure become linear polymer compounds; The second type is the bulk structure, where polymers with this structure combine to form bulk polymer compounds. Some polymers have branched chains, called branched polymers, which belong to linear structures. Some polymers have cross-linking between molecules, but less cross-linking, forming a network structure and belonging to the bulk structure.

The widespread application of transparent packaging boxes determines their irreplaceable position, and the above basic knowledge of plastics can better understand some professional knowledge of plastics, making it easy to master the types and methods of making transparent plastic packaging boxes.

The glossiness of transparent packaging boxes refers to the degree of mirror reflection on the surface of the packaging box, expressed as a percentage. The higher the glossiness of the PVC box, the more it can reflect light like a mirror on its surface, and the more it can display bright appearance characteristics. In fact, in addition to mirror reflection, there is also diffuse reflection on the surface of PVC boxes, which reduces the glossiness of PVC boxes. PVC boxes with high glossiness have brighter ink colors for printing, and the visual effect of ink colors is also better.

It can be said that the smoother the transparent packaging box, the higher the glossiness, and the higher the glossiness of the printed color. The glossiness and smoothness of PVC boxes are closely related, but glossiness is not smoothness. The glossy surface of PVC boxes does not necessarily mean a smooth surface. From the glossiness characteristics of PVC boxes, it is of practical significance to choose the appropriate PVC box for printing based on the printing characteristics.

The numerous advantages of transparent packaging boxes make us firmly committed to the future development prospects of transparent packaging boxes. Transparent packaging boxes will be the direction of future packaging box development!