LDPE塑料|卡塔爾石化|FB3003 擠出吹膜 農(nóng)膜料

供應(yīng)卡塔爾石化 LDPE 產(chǎn)品如下；
  Lotrène 卡塔爾石化 LDPE FB3003 無添加劑；接觸食品的可接受的高耐環(huán)境應(yīng)力開裂 農(nóng)業(yè)應(yīng)用電纜
  Lotrène 卡塔爾石化 LDPE FB5026 接觸食品的可接受的良好的尺寸穩(wěn)定性 袋；薄膜；工業(yè)應(yīng)用；包裝襯墊
  Lotrène 卡塔爾石化 LDPE FD0270 無添加劑；接觸食品的可接受的良好的尺寸 袋；薄膜；泡沫材料；包裝
  Lotrène 卡塔爾石化 LDPE FD0274 防粘連；接觸食品的可接受的； 薄膜材料；食品包裝；
  Lotrène 卡塔爾石化 LDPE FD0374 防粘連；接觸食品的可接受的； 包裝薄膜；
  Lotrène 卡塔爾石化 LDPE FD0474 接觸食品的可接受的；良好的加工性能 流延薄膜；薄膜；食品包裝；包裝
  Lotrène 卡塔爾石化 LDPE FE3000 接觸食品的可接受的；高強度；光學(xué) 農(nóng)業(yè)應(yīng)用；袋；工程應(yīng)用
  Lotrène 卡塔爾石化 LDPE FE8000 無添加劑；接觸食品的可接受的高強度 袋；膜材料；包裝；包裝；
  Lotrène 卡塔爾石化 LDPE FE8004 接觸食品的可接受的介質(zhì)剛度；光學(xué)； 袋；膜材料；包裝；包裝
  Lotrène 卡塔爾石化 LDPE LA0710 無添加劑；接觸食品的可接受的良好的粘附 涂層的應(yīng)用；
  Lotrène 卡塔爾石化 LDPE MG20 接觸食品的可接受的；靈活性好；帽子；家居用品
  Lotrène 卡塔爾石化 LDPE MG70 接觸食品的可接受的；靈活性好 薄壁零件
  LDPE 卡塔爾石化 FD0474 加工方式:吹塑成型.材料屬性:薄膜級.食品接觸級.


By Huayun plastic raw materials Co., Ltd. raw materials agent, low density polyethylene molecular chain has long and short branched chain. Low crystallinity, molecular weight of 50 ~ 50 million, it is a milky white translucent wax solid resin, non-toxic. It can work at 60 ℃ ~ - 80 ℃ and has electrical insulation (especially high-frequency insulation). LDPE has poor mechanical strength, low heat resistance, poor environmental stress cracking resistance, adhesion, adhesion and printability, and needs to be processed on the surface The adhesion and printability can be improved after chemical erosion and corona treatment. Water absorption is very low, almost no water absorption, chemical stability, such as acid, alkali, salt, organic solvents are more stable. It has high permeability to CO2 and organic odor, but poor permeability to water vapor and air. It is easy to burn and looks like paraffin when burning; it is easy to be aged and degraded under sunlight and heat, and changes color from white to yellow to brown, and finally turns black, and its performance decreases or cracks. If a certain amount of antioxidant and ultraviolet absorbent are added, its performance can be improved, and crosslinking under chemical crosslinking agent or high-energy irradiation can improve softening point, temperature resistance, rigidity, solvent resistance, etc.

According to the types of comonomers, LLDPE can be divided into three types: C4 (butene-1), C6 (Hexene-1) and C8 (octene-1). Among them, butene copolymer is the LLDPE resin with high production, while hexene copolymer is the LLDPE variety with fast growth. In LLDPE resin, the typical amount of comonomer is 5% - 10% by weight, and the average amount is about 7%. Metallocene based LLDPE plasticizers (mLLDPE) have an average comonomer content of more than three times that of conventional LLDPE.

Linear low density polyethylene (LLDPE) is a copolymer of ethylene and a small amount of higher α - olefins (such as butene-1, Hexene-1, octene-1, tetramethylpenten-1, etc.) by high pressure or low pressure polymerization in the presence of catalyst. The density is between 0.915 and 0.940 g / cm3. However, according to ASTM d-1248-84, the density range of 0.926-0.940 g / cm3 is medium density polyethylene (MDPE). The new generation LLDPE has expanded its density to plastic (0.890-0.915 g / cm3) and elastomer (< 0.890 g / cm3). However, the American Plastics Industry Association (SPI) and the American Plastics Industry Council (APC) only extended the scope of LLDPE to plastids, excluding elastomers. In the 1980s, Union Carbide and Dow chemical called their early plastic and elastomer resins very low density polyethylene (VLDPE) and ultra low density polyethylene (ULDPE).

The molecular structure of conventional LLDPE is characterized by its linear main chain, with little or no long branches, but some short branches. The absence of long branched chains makes the polymer more crystalline.

Generally, LLDPE resins are characterized by density and melt index. Density is determined by polymer

Low density polyethylene (LDPE) is suitable for various molding processes of thermoplastic molding. It has good molding processability, such as injection molding, extrusion, blow molding, rotary molding, coating, foaming process, thermoforming, hot air welding, hot welding, etc. LDPE is mainly used for film products, such as agricultural film, ground covering film, agricultural film, vegetable greenhouse film, etc.; packaging film such as candy, vegetables, frozen food, etc.; liquid packaging film (milk, soy sauce, juice). The main products are: bean curd, soybean milk; heavy packaging bag, shrink packaging film, elastic film, lining film; construction film, general industrial packaging film and food bag. LDPE is also used for injection molding products, such as small containers, lids, daily products, plastic flowers, injection stretch blow molding containers. Medical appliances, medicine and food packaging materials, extruded pipes, plates, wire and cable cladding, profiled materials, thermoforming and other products; blow molding hollow molding products, such as food containers, dairy products and jam, cosmetics, chemical products containers, tanks and so on.