Liaoning heat shrinkable film label manufacturer supply quotation and profit

Liaoning heat-shrinkable film label manufacturers supply quotations to profit release time: 2019-12-31 Liaoning heat-shrinkable film label manufacturers supply quotations to profit, Wuhan Packaging Materials Co., Ltd., as a large distributor in Hubei Province, has always used products to speak , You can buy cheap heat shrinkable film labels, ops heat shrinkable film labels with one phone call, hurry up and call to order! Earn when you buy it! In the production process of heat shrinkable film, pay attention to the following points. The die should be cleaned accordingly, and no burnt plastic should fall into it. If it can be found by the naked eye, it needs to be cleaned immediately. The paper tube should be aligned accordingly, not one side long and the other short. When packing, be careful not to collide and cause quality problems such as edge breakage. Try to minimize the appearance of surface wrinkles and white pressing lines in the middle, so as not to affect the appearance. The edge material should be cut neatly, and the stretched film that is cut unevenly cannot be shipped as a finished product. In order to achieve shrinkage of the oriented crystalline molecular chain, the crystal lattice needs to be destroyed, which requires raising the temperature to near the melting point, and the relaxation time of the molecular chain is longer, which is impossible to achieve during the use of shrink film. For the heat shrinkable film made of the same material, the higher the proportion of amorphous area, the greater the shrinkage rate and the greater the shrinkage force. A heat shrinkable film with a larger amorphous area has a lower shrinkage temperature. Heat shrinkable film is a kind of thermoplastic film that is stretched and oriented during the production process, and shrinks by heat during use. The parameter to measure heat shrinkable film is shrinkage, shrinkage, tension, and shrinkage temperature. Considering the above three parameters, to obtain a film with a higher shrinkage rate, it is better to use a polymer resin with low crystallinity or low crystallinity. After the amorphous resin is biaxially oriented, although the molecular chains are oriented, there is no crystallization. When receiving the second preheating, all the oriented chains can shrink, and only the non-crystalline oriented molecular chains will be heated lower. It shrinks after a short processing time. The heat shrinkage of the film was applied as early as 1936, and the rubber film was mainly used to shrink packaging perishable food. Nowadays, heat-shrinking technology has been developed to almost use plastic heat-shrinkable film to package various commodities. In addition, shrink packaging is also used to make shrink labels and shrink bottle caps, so that containers that are not easy to print or have complex shapes can be labeled. The heating temperature is affected by the material. The heating temperature will affect the strength of the heat shrinkable film, thereby affecting its quality. Generally speaking, the temperature should be controlled at about 160 degrees Celsius during the actual heating process; if it is too high or low, it will be It has varying degrees of impact. Under the premise of temperature and pressure, the longer the heating time, the stronger the bond between the seal layers, and the better its performance; but if the length of time is not accurately grasped, problems such as poor flatness of wrinkles will occur; ：Heat shrinkable film cannot produce holes