Beijing 0.4-thick polyethylene isolation film Co., Ltd., 0.3 polyethylene film, 0.2 thick polyethylene film franchise

Description :

　　The polyethylene PE film produced by our company is also known as polyethylene plastic film.

　　This product is also known as polyethylene isolation film, polyethylene waterproof film, polyethylene anti-seepage film, polyethylene moisture-proof film, PE isolation film, PE moisture-proof film, PE waterproof film

　　Product thickness: various thicknesses such as 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, etc,

　　Product size: Regular size: 6 meters wide * 50 meters long (roll)

　　1、 Introduction to Beijing Polyethylene Film Products:

　　PE films are mainly divided into two categories: high-density polyethylene (HDPE) films and low-density polyethylene (LDPE) films. Polyethylene native resin is selected. The main component is 97.5% of high-density polyethylene, about 2.5% of carbon black, anti-aging agent, antioxidant, ultraviolet absorber, stabilizer and other auxiliary materials. The current automatic polyethylene film production equipment is made by three-layer co extrusion technology.

　　2、 Performance characteristics of Beijing polyethylene film:

　　1. Suitable viscosity: easy to stick and tear;

　　2. Stable peeling force: small changes over time, that is, the smaller the increase in peeling force, the better;

　　3. Good weather resistance: Under sunlight exposure conditions, the service life can last up to six months to one year;

　　4. Long storage period: stored in the warehouse for more than one year without any change in quality;

　　5. Non polluting and non corrosive: The adhesive is inert and will not undergo chemical reactions with the surface of the adhered material;

　　6. Mechanical properties: tensile strength, elastic modulus, elongation, etc. that meet user requirements.

　　Beijing Polyethylene Film Manufacturing and Wholesale Co., Ltd.:

　　Beijing is one of the centers of China's railway network, mainly including the Beijing Kowloon Railway from Beijing to Hong Kong Kowloon, the Beijing Shanghai Railway from Beijing to Shanghai, the Beijing Guangzhou Railway from Beijing to Guangzhou, the Beijing Harbin Railway from Beijing to Harbin, the Beijing Baotou Railway from Beijing to Baotou, and the Beijing Yuanping Railway. Beijing polyethylene film, abbreviated as PE film, is divided into 0.2mm PE film, 0.3mm polyethylene PE film, 0.4mm polyethylene plastic film, and 0.5mm polyethylene isolation film according to thickness. The product is applied to various types of construction sites in Beijing, including top polyethylene isolation film, bottom polyethylene moisture-proof film. Understand the price market of polyethylene film in Beijing and find polyethylene film manufacturers in Beijing. For more information on Beijing polyethylene film, please contact the manufacturer. The Beijing Guilin high-speed railway (Beijing Guangzhou high-speed railway ->Hunan Guangxi high-speed railway), the Beijing Tongliao railway from Beijing, and the Beijing Chengde railway from Beijing to Chengde. In terms of international railway transportation, trains to various cities in Russia, the Mongolian capitals of Ulaanbaatar and Pyongyang, and to the Vietnamese capital of Hanoi all depart from Beijing. Beijing 0.4-thick polyethylene isolation film Co., Ltd., 0.3 polyethylene film, 0.2 thick polyethylene film franchise

　　3、 Application of Beijing polyethylene film:

　　High density polyethylene (HDPE) film, as a new type of material, has the characteristics and functions of anti-seepage, anti-corrosion performance, good chemical stability, and can be processed according to actual engineering needs. It has been widely used for anti-seepage of embankments, dams, and reservoirs in water conservancy projects. At the same time, it is also used as an isolation, anti-seepage, anti-corrosion, leak proof, and moisture-proof material in channels, reservoirs, sewage pools, swimming pools, building construction, underground buildings, garbage dumps, environmental engineering, and other aspects. This technology has been widely used since the 30th century, and gradually promoted the use of HDPE film in various projects since the 1980s.

　　4、 Common specifications of polyethylene film in Beijing:

　　Thickness: 0.15mm-0.5mm, width: 6m-10m, roll length: 50 meters per roll, 300 square meters or 400 square meters.

　　5、 Selection of Film Materials for Polyethylene Film Blowing Process Manufacturing in Beijing:

　　The selected raw materials should be blown film grade polyethylene resin particles containing an appropriate amount of lubricant to ensure the openness of the film.

　　2. The melt index (MI) of resin particles should not be too high. If the MI is too high, the viscosity of the molten resin will be too low, the processing range will be narrow, the processing conditions will be difficult to control, and the film-forming properties of the resin will be poor, making it difficult to process into a film; In addition, the melt index (MI) is too high, the relative molecular weight distribution of the polymer is too narrow, and the strength of the film is poor. Therefore, resin raw materials with lower melt index (MI) and wider relative molecular weight distribution should be selected to meet the performance requirements of the film and ensure the processing characteristics of the resin. Blow molded polyethylene film generally uses polyethylene raw materials with a melt index (MI) ranging from 2 to 6g/10min. Beijing 0.4-thick polyethylene isolation film Co., Ltd., 0.3 polyethylene film, 0.2 thick polyethylene film franchise

　　6、 Key points for production control of Beijing polyethylene film and polyethylene plastic film blow molding process:

　　The process flow of blown film is roughly as follows:

　　The material is fed into the hopper and undergoes plasticization and extrusion, followed by inflation and traction, air ring cooling, herringbone clamp, traction roller traction, corona treatment, and film winding. However, it is worth noting that the performance of blown film is closely related to production process parameters. Therefore, in the process of blown film, it is necessary to strengthen the control of process parameters, standardize process operations, ensure smooth production, and obtain high-quality film products. In the production process of polyethylene blown film, the main focus is on controlling the following process parameters:

　　1. Extruder temperature

　　When blow molding low-density polyethylene (LDPE) film, the extrusion temperature is generally controlled between 160 ℃ and 170 ℃, and it is necessary to ensure uniform head temperature. If the extrusion temperature is too high, the resin is prone to decomposition, and the film becomes brittle, especially causing a significant decrease in longitudinal tensile strength; If the temperature is too low, the resin plasticization will be poor, and it will not be able to expand and stretch smoothly. The tensile strength of the film will be low, and the surface gloss and transparency will be poor. Even patterns like wood rings and unmelted crystal nuclei (fish eyes) may appear. Beijing 0.4-thick polyethylene isolation film Co., Ltd., 0.3 polyethylene film, 0.2 thick polyethylene film franchise

　　2. Inflation ratio

　　The inflation ratio is one of the key control points in the production process of blown film, which refers to the ratio between the diameter of the film bubble after inflation and the diameter of the tube ring without inflation. The inflation ratio is the transverse expansion multiple of the film, which is actually a transverse stretching of the film. Stretching will have a certain degree of orientation effect on plastic molecules, increasing the inflation ratio and thus improving the transverse strength of the film. However, the inflation ratio should not be too high, otherwise it may cause instability of the film bubbles and the film is prone to wrinkling. Therefore, the inflation ratio should be appropriately matched with the traction ratio. Generally speaking, the inflation ratio of low-density polyethylene (LDPE) film should be controlled between 2.5 and 3.0. Beijing 0.4-thick polyethylene isolation film Co., Ltd., 0.3 polyethylene film, 0.2 thick polyethylene film franchise

　　3. Traction ratio

　　Traction ratio refers to the ratio between the traction speed of the film and the extrusion speed of the pipe ring. Traction ratio is the longitudinal stretching ratio that gives the film a directional effect in the pulling direction. As the traction ratio increases, the longitudinal strength will also increase, and the thickness of the film will become thinner. However, if the traction ratio is too large, the thickness of the film is difficult to control, and it may even break the film, causing film breakage. The traction ratio of low-density polyethylene (LDPE) film is generally controlled between 4 and 6. Beijing 0.4-thick polyethylene isolation film Co., Ltd., 0.3 polyethylene film, 0.2 thick polyethylene film franchise

　　4. Dew point

　　Dew point, also known as frost line, refers to the boundary between the viscous flow state and the highly elastic state of plastic. During the blown film process, low-density polyethylene (LDPE) is in a molten state and has good transparency when extruded from the mold. After leaving the mold, the expansion zone of the film bubble needs to be cooled by a cooling air ring. When the cooling air is blown at a certain angle and speed towards the plastic film bubble just extruded from the machine head, the high-temperature film bubble comes into contact with the cooling air, and the heat of the film bubble will be carried away by the cooling air. Its temperature will significantly drop below the viscous flow temperature of low-density polyethylene (LDPE), causing it to cool, solidify and become blurry. On the blown film bubble, we can see a boundary between transparency and blurring, which is the dew point (or frost line).

　　During the blown film process, the dew point has a certain impact on the performance of the film. If the dew point is high and located above the inflated film bubble, the film is inflated in liquid state, and inflation only thins the film without stretching the molecules. At this point, the performance of the inflated film is close to that of a cast film. On the contrary, if the dew point is relatively low, the inflation is carried out in the solid state. At this time, the plastic is in a high elastic state, and the inflation is like transverse stretching, causing molecules to undergo orientation, thereby making the performance of the inflated film close to that of the oriented film.

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• 0.4mm thick polyethylene isolation film