zhiteng stretch film

  How to handle the surface of stretch wrapping film correctly? With the continuous emergence of various new materials, new equipment and new processes, the  stretch wrapping film  will develop towards the direction of diversification, specialization and multi-functional composite film.   The longest method for surface treatment of stretched film is corona treatment. The basic principle is: by applying high temperature between the metal electrode and the corona treatment roller (usually a high-temperature, ozone-resistant, and highly insulating silicone rubber roller). The high-frequency and high-voltage power supply generates electric discharge, which ionizes the air and forms a large amount of ozone. At the same time, high-energy electric sparks hit the surface of the film.   The magnitude of the wet tension on the surface of the corona treated stretched film is related to factors such as the voltage applied to the electrode, the distance between the electrode...

  PE stretch film made of what materials? Nowadays,   PE stretch film   is the most widely used in the logistics industry. It is a convenient and environmentally friendly packaging material. The use of PE stretch film is very common. It can also be used in food packaging, protection of products in transportation, storage, and processing. , Avoid damage during use. So what materials are made of PE stretch film?   1. PE stretch film is made by co-extrusion of polypropylene particles to form a sheet, and then stretched in two deflection directions. Because of the orientation of the stretched molecules, the transparency of polyethylene decreases with the addition of crystallinity. Under a certain degree of crystallinity, the transparency increases as the molecular weight increases. High-density polyethylene has a melting point scale of 132-135°C, while low-density polyethylene has a lower melting point (112°C) and a wide range.   2. PE stretch film is made of polyet...

  In the packaging industry, there is no shortage of stretch film products, and this year, there is a   black stretch film   in stretch film products. The total annual demand for black stretch film reaches about 60,000 tons, and the annual output of domestic stretch film is about 30,000 tons. The global demand for stretch film is increasing year by year, with an annual growth rate of about 6-7%.   Black stretch film products can greatly reduce the cost of use, packaging can also reduce labor intensity, improve packaging quality and packaging efficiency, and hope to become the main force in the packaging market in the future. Stretch film is strong, resistant to pulling, and self-adhesive. , Low temperature resistance and good shrinkage force. Generally, the stretch film is divided into single-sided adhesive and double-sided adhesive.   Even scattered small items can become a whole. The stretch film can tightly wrap the products with its own winding force and ret...