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  How to detect the quality of wrapping film? Wrapping film  is widely used in the packaging and transportation of various products. Wrapping film is also called stretch film. Toughness and shrinkage are the criteria for measuring the quality of stretch film. If the quality is not good, then you will not accept it after the packaging is completed. , Can not play the role of protection as it should be. So how to check the quality of stretch film? 1. A micrometer can be used to detect stretched film. It is not easy to grasp accurately by visual inspection. Because the diameter of a hair is about 7 filaments, the sensitivity of the hand feel is unattainable. Someone uses a scale to weigh the weight of each roll. In fact, the film is maintained. The thickness of the bottom paper and the glue are different, so it is difficult to accurately grasp. The thickness of the 9-thread mask is also coated with a layer of glue, so it should reach 11 threads instead of the total amount of stre...

  How to distinguish between stretch film and plastic wrap Many people don't know how to distinguish the difference between plastic wrap and  stretch wrap film , or even how to distinguish their uses. Today, ZHX stretch stretch film manufacturers will tell you how to distinguish stretch film and cling film. Many people have a misunderstanding about stretch film. Artificial stretch film is a poor quality cling film, and cling film is divided into PE and PVC. PE is a bit like a plastic bag with cheaper material, and PVC bag food looks brighter. PVC is used for packaging fresh fruits and vegetables. Like stretch film, it is usually a low-quality PVC film. If there are too many impurities or opaque and bright, it cannot be used on packaged food. In fact, stretch film has higher tensile strength and transparency, but it cannot be used for food packaging. Transparent food-grade packaging can package food with slightly higher tensile strength, while cling film is more expensive. Stre...

  Principle and characteristics of PE stretch wound film PE stretch wrap film  can be called stretch film, stretch film, stretch wrap film and so on. With the help of the super-strength winding force of the stretched film, the product can be compactly bundled into a unit. And there are no sharp edges and stickiness. There is no looseness and separation of the product even in unfavorable environments. Stretch film has the characteristics of strong toughness, high elasticity, tear resistance, high viscosity, thin thickness, cold resistance, heat resistance, pressure resistance, moisture and dust resistance, oil resistance, single-sided and double-sided adhesive. In use, it can save materials, labor, and time. In use, in order to make the stretch film tightly wrap the packaged items, the film needs to be stretched first, and then wrapped around the object. The stretch film has the following characteristics: 1. Strong tensile strength, not only has super tensile strength, but also...

  Explanation of tensile film properties Tensile film  is also called stretch film and heat shrink film. It was originally produced with PVC as the base material and DOA as the plasticizer to play a self-adhesive role. Due to environmental protection issues, high cost (relatively large proportion of PE, less unit packaging area), poor stretchability and other reasons, when China began to produce PE stretch film in 1994-1995, it was gradually eliminated. PE stretch film first uses EVA as the self-adhesive material, but its cost is high, and it has a taste, and then develops to use PIB, VLDPE as the self-adhesive material, and the base material is mainly LLDPE, including C4, C6, C8 and metallocene PE ( MPE). Stretch film series: manual stretch film, machine stretch film. Product introduction: Stretch film is also called elastic film, self-adhesive film, packaging stretch film, boxing film, and packing film. When in use, the film itself can be stretched and wrapped with self-visc...

  Stretch wrapping film  is a winding method in which an elastic film is stretched around a wrapper, wrapped tightly, and sealed at its top end at room temperature. Assembling the stretch film for pallet winding can save energy, reduce winding costs, reduce transportation losses and improve logistics efficiency. So, what is the classification of stretch film? Classification of stretch film: 1. Manual stretch film, which is a kind of stretch film that is manually wound. Generally, the stretch film has relatively low quality requirements, and the winding weight is about 4KG, which is convenient for operation. 2. Machine resistance stretch film. This kind of stretch film is a mechanical stretch film, which drives the film roll under the movement of the goods. It has certain requirements for the extension of tensile strength. Generally, the elongation rate is about 300%. The volume and weight are generally 15KG. 3. Machine pre-stretched stretch film, this stretch film is wound by ...

  How to detect the quality of   stretch wrapping film , stretch wrapping film is widely used in the sales and transportation of various products, stretch wrapping film is also called stretch film, toughness and retraction force are two major standards for measuring the quality of stretch film If the quality is not good, the protection effect will not be achieved after the packaging is completed. So how should the quality of stretch film be tested? 1. A micrometer can be used to detect stretched film. It is difficult to accurately grasp by visual inspection alone. Since the diameter of a hair is about 7 filaments, the sensitivity of hand feel is difficult to reach. Some people use a scale to weigh the weight of each roll. In fact, the thickness of the bottom paper of the maintenance film and the glue are different, so it is difficult to accurately grasp the thickness of the 9-filament film because a layer of glue is applied to the reverse side, so it should reach 11-filament i...

  Zhanhuixin is a professional   stretch film manufacturer . The surface tension of the stretch film depends on the free energy of the plastic film, and the surface energy of the stretch film depends on the molecular structure of the film itself. There are many factors influencing the surface tension, so what are the factors that affect the surface tension of the stretch film? 1. Non-polar polymer, its surface free energy is small, the surface wet tension is low, generally 30 dyne/cm effect. Theoretically, if the surface tension of the object is lower than 33 dyne/cm, ordinary inks or adhesives cannot adhere firmly, so the surface must be treated. 2. The transfer of the aluminized layer will occur when aluminizing, and the transfer of the glue layer will occur when applying glue. The main measure to prevent corona on the reverse side of the film is to adjust the pressure of the rubber pressing roller before the corona treatment roller. The pressure at both ends must be the sam...