Avon Foods (Beijing) produces rainbow juice sugar, which uses triangle plastic soft bags and is attractive and colourful. During the purchase process, although for branded foods, the price of mini-packages is not high, thereby expanding the product's consumer base. Shanghai Shenfeng's heart-producing elastic chocolate, mainly in red and gold colors, adopts an independent small package of triangular bags to be inflated and translucent. It refracts a dynamic and brilliance, and has novel taste and convenient consumption. Generally, in the process of manufacturing the ordinary rectangular bags in this type of packaging, the unit foods are separated by a certain distance, the inside of the two layers of the SP film around the food is heat-sealed and sealed on the bar-shaped packaging machine, and the tooth marks are pressed between the foods to form a unit package form. The units form small packages in rows. This type of packaging is continuously operated on a packaging machine and is particularly suitable for large-volume automated packaging. When eating, tear the SP film along the tooth marks, so that taking a packet of food at one time does not affect the reuse of other food packaging. According to the company's technical personnel, the production of triangular-brown packaging is slightly different. It is first set on a computer with a fixed size. The machine rotates one opening per mouth. The material used is PET with CPP or PET with aluminum plating. CPD, SP film is also available. When it is required that the moisture proof performance is very high, KOP can be used, that is, a film is covered on the plastic, but the material is relatively expensive. Company technicians revealed that all inks and solvents used by Shenfeng were food grade, and for chocolate, benzene-containing solvents penetrated into the chocolate, causing the food to become paralyzed and toxic to the human body. Therefore, strict use of benzene-free Solvents. In addition, during the packaging process, the gas filling in the bag can be completed on the production line without additional treatment.