Palace film processors are used to the market double every five years. Market demand has increased from 250 million pounds per year to 500 million pounds. Nearly five years ago, when the five -layer stretch membrane became popular in the market, resin demand stabilized at about 1.4 billion pounds. However, in the past two years, the demand for stretching membrane resin has stabilized at about 1.4 billion pounds. About 65-70%of the stretch membrane is a streaming film, most of which are used as machine packaging materials, while 30-35%are blowing membranes. Essence Competition in the film field is a cruel competition for market share. The profit of processing manufacturers is often only minimum per pound. Only those North American processing manufacturers that seem to be developing and invested are new thin films that are producing multi -layers. When the five -layer tensile membrane was introduced in the mid -1990s, it replaced a large number of single -layer or three -layer membranes composed of hypertrophic LLDPE. It requires the fourth squeeze machine and five -layer supply table to allow the use of cheaper butadiene LLDPE, which is enhanced by the support thin layer of Mao Metal LLDPE material. The typical five -layer structure may be the A -B -C -B -A mode, which contains 10%of the surface layer of the olene LLDPE, the lower layer of the 20%MLLDPE surface, and the 40%llped core layer. The film stretch has become larger, and the production speed increases with the number of layers. The standards of five years ago were five 20“ rollers and three layers. It is now six rollers and five layers. The fifth -layer stretching of all stretching membranes in North America accounts for 40%. The use of Mao metal resin has increased from gap in 1995 to 12%of all LLDPEs. However, MLLDPE is expensive, so most of the processors rely on seven or nine layers, and in some cases, they form a high -performance thin film. For example, the seven -layer stretch film producers believe that their products can replace the thick film with fewer layers without sacrificing the load to maintain their ability. In the past few years, all the extension film production lines installed in North America have been designed for five or more membranes. They create a record of the number of layers, PIPE EXTRUSION LINE first seven layers, and then nine layers. Now processors and machine manufacturers are talking about 11, 14, and even 70 floors. Some manufacturers realize the commercialization of micro -layer blocks to block the performance, but stretching membranes are also an application. They can produce the thickness of Er (1 Egypt \u003d 0.0001 microns) as a unit, or a thin layer of the membrane thickness. The processor is interested in this, but no one has tested it yet. More and more layers of many new multi -layer membrane production lines have been in the hands of new manufacturers of stretching membrane markets, and the market share has changed. Chaparral launched the first seven -layer film in 1994. Mexico Rafia launched the seventh floor production line in 1996 and added the second stage in 2001. Relying on enough extrusion machines and layers, processing plants can use Mao Metal to make JingjingThis is the market opportunity with high efficiency and excellent performance. Most old manufacturers in this field are unable to add higher technology. They do not intend to invest on the new seven -layer membrane. At the same time, Sigma Plastic Group, an important manufacturer of the film film, began to involve the stretch film market since 1994, and established the world’s first nine -story stretch production line in 2000. One reason for the increasing income of stretching membrane and resin is that the membrane has been thinned. The standard in 1995 was 0.0009“. Today it is 0.00065“ to 0.0008“. An important impact of a decrease in thickness is that it has lower efficiency of the old production line. In the past, equipment with a 0.001“ film of 3000IB/HR now manufactured 0.0007 “ thick membrane, so it lost 30%of the machine capabilities. The only way for the old machine can keep up with the formal form is to use a brand new roll -up machine, but the processor has already made such a large investment for the new machine. The number of cargo plate packaged with stretch membranes is still growing steadily. Today’s film is not only thinner, but it can pull further. In 1985, a 12 ounce film was used to wrap an ordinary cargo. This number dropped to 5 ounces in 1995 and 4 ounces in 2000. The amount of cargo entangled by weight plastic in the same year increased by 30 %. This means that there is still a lot of space to further reduce the thickness, especially in multi -layer membranes. The stretching of most membranes will eventually exceed 350%, but the average value on the tray may only be 165%to 180%. In many circumstances. The stretch membrane is better today than the extension equipment. The thin film that has appeared on the market can be wrapped more, and potentially forms more excess production capacity. Why are there more and more layers of thin film only applied to the stream extended film of the machine bandaging. The bandaging film has a LLDPE mixture of one to three layers, which contains the expensive attachment licking agent that is not used in the delay film. There are generally no different materials for thin films. Separate a resin flow to the thin slices that are stacked together, and an extra thin layer is generated in the feeding block. This technology is generally applied to squeeze out of the sheet to obtain a more uniform resin distribution. Squeezing the thin layer of the thin layer can increase the strength of the pinhole. Squeeze the Maomin resin even thinner, which actually makes them not easy to break, which is the same as glass. The nine -layer film like a sandwich plate has higher pre -stretching than the five -layer membrane, with pinhole strength and tear resistance. The thin layer of MLLDPE interaction also makes the low -price wide -type film more utilized and reduces the amount of MLLDPE. The metal content in the seven -layer membrane with three layers of MLLDPE will drop to 33%. When there are good reasons for the formation of a multi -layer from a resin stream, there are also controversy in using more extrusion machines. The thin layer of a resin with two extruders increases the production line production, but this will not affect the performance of the film. There are two 4.5“ extruders instead of a high yield of a 6“ extrusion machineThe production line is also flexible for the production of complex or simple products. The temperature control is much easier than the 4.5“ extruder than 6“. No stop, high output non -stop operation and high operating efficiency are the key to maintaining the profit of the stretch film. Online width adjustment binding to the feeding block is important for changing the order of each layer. The operation of the stretch membrane production line is also getting faster and faster to cope with competition. Several manufacturers can maintain a speed of 1700-1800ft/min at 4100IB/HR. High productivity in turn requires faster wounds and more automation. The latest stretch roll acquisition machine runs at a speed of 1400ft/min, while the traditional stretch film roll machine, the more 600ft/min, the more. The latest roll machine produces a set of 6 to 10 handworms every 50 to 60 seconds, and the same number of machines of the roll (large diameter) of the same number takes 3 to 5 minutes, which are different according to the specifications. Such a fast speed requires automated rolls to unload and remove the core. At least three American processors are also invested in the safe automation boxes of hand around the plastic film. The operation of the machine is slowly operated, generally the automation of the part. Completely automated packaging is more common in Europe, and artificially is higher. In the early 1990s, the stretch film production line also became wider to increase production. The processor uses the dual -chamber vacuum box and the edge to fix the film to fix the film on the cooling roller. The winding machine has become wider. When Black Clawson establishes a rolling roller with a width of 120“, it uses a dual core shaft with a central support. This makes a single volume with a diameter of 3 “ a single -volume function with a high -speed roll. on the other hand. The latest roll machines from BattenFeld Gloucesser and Davis -Stan -Dard are designed as a dual -rolled device. Each is equipped with a short axis, which is said to have better stability, although their equipment and maintenance overhead are high. Melldpe or multi -layer has not been used in blowing plastic stretching membranes in the stretching membrane. Although the directional progress can open the opportunity for more layers and performance. BattenFeld Gloucesser launched the same rail -to -tie stretcher, which stretched the membrane 200%to 300%. The output of blowing and stretching membranes is generally restricted by cooling, but this progress makes the extrusion function of the extrusion function two to three times higher than that of the stretch membrane. BattenFeld Gloucess’s machine -oriented positioning model device uses the S -shaped wound of the two preheat rollers to heat each side of the thin film. It also has two S -shaped wounds of two rubber pull rollers, and the speed is three to four times faster than the preheating roller of the stretching membrane. Two heating tough rollers restore part to stretch. The last two cooling rollers were closed at the remaining stretch. The iconic problem of the directional single -layer membrane is that a high degree of pre -stretching may have the effect on the surface of the film, and the high level of pre -stretching is sticky.The influence of multi -layer membranes on the attached layer is well known.Stretching and wound reservoirs and large volumes of waste are new areas where the application of stretching membranes in the past three years.The three -layer membrane is the first choice of storage to prevent decomposition. The double -axis stretch produces a better perforation performance than dry grass stalks.Anti -corrosion stretching film is called steam corrosion inhibitory products (VCI). It is a new product used to protect iron rods and other metal products without rust.Because inhibitory additives are corrosive, it is difficult to be produced by steam corrosion inhibitory products.The reduction of thickness and complex structures make today’s stretch membrane further.