卡塔尔石化LDPE FB3003|高透明原料

供应卡塔尔石化 LDPE 产品如下；
  Lotrène 卡塔尔石化 LDPE FB3003 无添加剂；接触食品的可接受的高耐环境应力开裂 农业应用电缆
  Lotrène 卡塔尔石化 LDPE FB5026 接触食品的可接受的良好的尺寸稳定性 袋；薄膜；工业应用；包装衬垫
  Lotrène 卡塔尔石化 LDPE FD0270 无添加剂；接触食品的可接受的良好的尺寸 袋；薄膜；泡沫材料；包装
  Lotrène 卡塔尔石化 LDPE FD0274 防粘连；接触食品的可接受的； 薄膜材料；食品包装；
  Lotrène 卡塔尔石化 LDPE FD0374 防粘连；接触食品的可接受的； 包装薄膜；
  Lotrène 卡塔尔石化 LDPE FD0474 接触食品的可接受的；良好的加工性能 流延薄膜；薄膜；食品包装；包装
  Lotrène 卡塔尔石化 LDPE FE3000 接触食品的可接受的；高强度；光学 农业应用；袋；工程应用
  Lotrène 卡塔尔石化 LDPE FE8000 无添加剂；接触食品的可接受的高强度 袋；膜材料；包装；包装；
  Lotrène 卡塔尔石化 LDPE FE8004 接触食品的可接受的介质刚度；光学； 袋；膜材料；包装；包装
  Lotrène 卡塔尔石化 LDPE LA0710 无添加剂；接触食品的可接受的良好的粘附 涂层的应用；
  Lotrène 卡塔尔石化 LDPE MG20 接触食品的可接受的；灵活性好；帽子；家居用品
  Lotrène 卡塔尔石化 LDPE MG70 接触食品的可接受的；灵活性好 薄壁零件
  LDPE 卡塔尔石化 FD0474 加工方式:吹塑成型.材料属性:薄膜级.食品接触级.

特性: 高清晰度.高光泽.用途:化妆品包装.媒介包装.食品包装应用.薄膜.流延薄膜.吹塑成型应用.添加剂:抗氧剂.芥酸酰胺润滑剂.
  LDPE可单独使用或与聚乙烯家族其它成员共混使用。广泛应用于包装。建筑、农业、工业和消费市场。挤出薄膜。LDPE的销路是制作薄膜(＜12毫时)。吹塑或铸压工艺生产出的单一和复合LDPE薄膜占LDPE国内消费总量的55%以上。LDPE制做的薄膜表现了良好的光学性能、强度、曲挠性、密封性以及缓慢的气味扩散性和化学稳定性。LDPE用来包装面包、农产品、快餐食品、纺织品、经久性消费品及一些工业制品。LDPE也可用作非包装薄膜，比如：一次性尿布、农用薄膜和缩水膜。
  挤压贴胶,它是LDPE的另一个主要市场。由于LDPE分子的结构特点，它是聚乙烯树脂家族中能够满足挤压贴胶加工工艺要求的树脂。贴胶提供了有助于成品包装密封的防护层，必不可少的优良的拉伸性能、持久的覆盖性和低的气味扩散性。典型的熔融指数范围为315克／1O分钟。LDPE贴胶可覆盖在很多基质上面，如：纸、板，布料和其它高分子材料。LDPE贴胶是保证基质热密封性和防湿性的一个经济而有效的手段。使用LDPE贴胶的市场有盛牛奶的盒子，无菌防腐包装，食品包装。胶带和纸制品。
  LDPE复合挤压广泛作为高阻隔复合层压板的一种组分。重要的要求就是防湿和密封。满足不同的要求，树脂的性能随之不同。它可用于无菌包装、药品与日用品的包装。
  低密度聚乙烯(LDPE)是高压下乙烯自由基聚合而获得的热塑性塑料。LDPE是树脂中的聚乙烯家族中最老的成员，二十世纪四十年代早期就作为电线包皮次商业生产。LDPE综合了一些良好的性能：透明、化学惰性、密封能力好，易于成型加工。这决定了LDPE是当今高分子工业中最广泛使用的材料之一。 乙烯是聚乙烯制品的基本结构单元。它是从炼油厂气、液化的石油气或液态烃中获得的无色气体。因为它是许多其它工业化学品和聚合物的成分，所以不断地存在乙烯供应的竞争。这种获得乙烯的竞争具有戏剧性地影响着聚乙烯的价格和有效价值。 物化性能 商业用的LDPE材料的密度为0.91~0.94g/cm3。LDPE对气体和水蒸汽具有渗透性。LDPE的热膨胀系数很高不适合于加工长期使用的制品。 如果LDPE的密度在0.91~0.925g/cm3之间，那么其收缩率在2%~5%之间；如果密度在0.926~0.94g/cm3之间，那么其收缩率在1.5%~4%之间。当前实际的收缩率还要取决于注塑工艺参数。 LDPE在室温下可以抵抗多种溶剂，但是芳香烃和氯化烃溶剂可使其膨胀。同HDPE类似，LDPE容生环境应力开裂现象。

  注塑工艺: 干燥：一般不需要 熔化温度：180~280C 模具温度：20~40C 为了实现冷却均匀以及较为经济的去热，建议冷却腔道直径至少为8mm，并且从冷却腔道到模具表面的距离不要超过冷却腔道直径的1.5倍。 注射压力：可到1500bar。 保压压力：可到750bar。 注射速度：建议使用快速注射速度。 流道和浇口:可以使用各种类型的流道和浇口。LDPE特别适合于使用热流道模具。 应用范围 LDPE可单独使用或与聚乙烯家族其它成员共混使用。广泛应用于包装。建筑、农业、工业和消费市场。挤出薄膜。LDPE的销路是制作薄膜(＜12毫时)。吹塑或铸压工艺生产出的单一和复合LDPE薄膜占LDPE国内消费总量的55%以上。LDPE制做的薄膜表现了良好的光学性能、强度、曲挠性、密封性以及缓慢的气味扩散性和化学稳定性。



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.