卡塔爾石化LDPE FB3003|高透明原料
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(qiáng)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(qiáng)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(jí).食品接觸級(jí).
特性: 高清晰度.高光澤.用途:化妝品包裝.媒介包裝.食品包裝應(yīng)用.薄膜.流延薄膜.吹塑成型應(yīng)用.添加劑:抗氧劑.芥酸酰胺潤滑劑.
LDPE可單獨(dú)使用或與聚乙烯家族其它成員共混使用。廣泛應(yīng)用于包裝。建筑、農(nóng)業(yè)、工業(yè)和消費(fèi)市場(chǎng)。擠出薄膜。LDPE的銷路是制作薄膜(＜12毫?xí)r)。吹塑或鑄壓工藝生產(chǎn)出的單一和復(fù)合LDPE薄膜占LDPE國內(nèi)消費(fèi)總量的55%以上。LDPE制做的薄膜表現(xiàn)了良好的光學(xué)性能、強(qiáng)度、曲撓性、密封性以及緩慢的氣味擴(kuò)散性和化學(xué)穩(wěn)定性。LDPE用來包裝面包、農(nóng)產(chǎn)品、快餐食品、紡織品、經(jīng)久性消費(fèi)品及一些工業(yè)制品。LDPE也可用作非包裝薄膜，比如：一次性尿布、農(nóng)用薄膜和縮水膜。
擠壓貼膠,它是LDPE的另一個(gè)主要市場(chǎng)。由于LDPE分子的結(jié)構(gòu)特點(diǎn)，它是聚乙烯樹脂家族中能夠滿足擠壓貼膠加工工藝要求的樹脂。貼膠提供了有助于成品包裝密封的防護(hù)層，必不可少的優(yōu)良的拉伸性能、持久的覆蓋性和低的氣味擴(kuò)散性。典型的熔融指數(shù)范圍為315克／1O分鐘。LDPE貼膠可覆蓋在很多基質(zhì)上面，如：紙、板，布料和其它高分子材料。LDPE貼膠是保證基質(zhì)熱密封性和防濕性的一個(gè)經(jīng)濟(jì)而有效的手段。使用LDPE貼膠的市場(chǎng)有盛牛奶的盒子，無菌防腐包裝，食品包裝。膠帶和紙制品。
LDPE復(fù)合擠壓廣泛作為高阻隔復(fù)合層壓板的一種組分。重要的要求就是防濕和密封。滿足不同的要求，樹脂的性能隨之不同。它可用于無菌包裝、藥品與日用品的包裝。
低密度聚乙烯(LDPE)是高壓下乙烯自由基聚合而獲得的熱塑性塑料。LDPE是樹脂中的聚乙烯家族中最老的成員，二十世紀(jì)四十年代早期就作為電線包皮次商業(yè)生產(chǎn)。LDPE綜合了一些良好的性能：透明、化學(xué)惰性、密封能力好，易于成型加工。這決定了LDPE是當(dāng)今高分子工業(yè)中最廣泛使用的材料之一。 乙烯是聚乙烯制品的基本結(jié)構(gòu)單元。它是從煉油廠氣、液化的石油氣或液態(tài)烴中獲得的無色氣體。因?yàn)樗窃S多其它工業(yè)化學(xué)品和聚合物的成分，所以不斷地存在乙烯供應(yīng)的競爭。這種獲得乙烯的競爭具有戲劇性地影響著聚乙烯的價(jià)格和有效價(jià)值。 物化性能 商業(yè)用的LDPE材料的密度為0.91~0.94g/cm3。LDPE對(duì)氣體和水蒸汽具有滲透性。LDPE的熱膨脹系數(shù)很高不適合于加工長期使用的制品。 如果LDPE的密度在0.91~0.925g/cm3之間，那么其收縮率在2%~5%之間；如果密度在0.926~0.94g/cm3之間，那么其收縮率在1.5%~4%之間。當(dāng)前實(shí)際的收縮率還要取決于注塑工藝參數(shù)。 LDPE在室溫下可以抵抗多種溶劑，但是芳香烴和氯化烴溶劑可使其膨脹。同HDPE類似，LDPE容生環(huán)境應(yīng)力開裂現(xiàn)象。
注塑工藝: 干燥：一般不需要 熔化溫度：180~280C 模具溫度：20~40C 為了實(shí)現(xiàn)冷卻均勻以及較為經(jīng)濟(jì)的去熱，建議冷卻腔道直徑至少為8mm，并且從冷卻腔道到模具表面的距離不要超過冷卻腔道直徑的1.5倍。 注射壓力：可到1500bar。 保壓壓力：可到750bar。 注射速度：建議使用快速注射速度。 流道和澆口:可以使用各種類型的流道和澆口。LDPE特別適合于使用熱流道模具。 應(yīng)用范圍 LDPE可單獨(dú)使用或與聚乙烯家族其它成員共混使用。廣泛應(yīng)用于包裝。建筑、農(nóng)業(yè)、工業(yè)和消費(fèi)市場(chǎng)。擠出薄膜。LDPE的銷路是制作薄膜(＜12毫?xí)r)。吹塑或鑄壓工藝生產(chǎn)出的單一和復(fù)合LDPE薄膜占LDPE國內(nèi)消費(fèi)總量的55%以上。LDPE制做的薄膜表現(xiàn)了良好的光學(xué)性能、強(qiáng)度、曲撓性、密封性以及緩慢的氣味擴(kuò)散性和化學(xué)穩(wěn)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 perbance decreases or cracks. If a certain amount of antioxidant and ultraviolet absorbent are added, its perbance can be improved, and crossbing under chemical crossbing 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, thermobing, 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, thermobing and other products; blow molding hollow molding products, such as food containers, dairy products and jam, cosmetics, chemical products containers, tanks and so on.
