Shanghai Daoqin Plastics Co., Ltd.

线 property low density polyethylene (PE) （LLDPE）
线 property low density polyethylene (PE) in structure upper different generally low density polyethylene (PE), is in long 支链. LLDPE plastics raw materials property degree 取决于LLDPE and LDPE different production processing process. LLDPE usually in more low temperature degree and pressure lower, ethylene and high grade a烯烃如丁烯, or copolymer combined formed. copolymer process formed LLDPE polymerization material tool has ratio generally LDPE more narrow molecular weight separation 布, meanwhile tool has property structure make its has different features. LLDPE melt flow features 适l应 new process requirements, especially is use film extrusion process, can high LLDPE product. LLDPE应 used for polyethylene (PE) has market. reinforcement resistant 伸, resistant 穿透, impact resistant and resistant property can make LLDPE适于 as film. it excellent resistant ring force cracking property, resistant low temperature impact property and resistant warpage property make LLDPE for pipe/tube, sheet/plate 材挤塑 and has application has force. LLDPE most new application is as is film used for waste 渣填埋 and waste liquid 池 衬层.
production and features
LLDPE production 起始于 渡 metal catalytic agent, especially is 齐格勒（Ziegler） or 飞利 浦（Phillips） type type. ring metal material catalytic agent new process is LLDPE production selection solution/scheme. polymerization reaction can in solvent liquid and gas versus reaction device in 进行. usually, and ethylene in solvent liquid versus reaction device in copolymer, 丁烯. and ethylene in gas versus reaction device in polymerization. in gas versus reaction device in formed LLDPE resin is pellets 形式, can powder material or 进一步 processing formed material 出售.
以己烯 and is new generation ultra- LLDPE already ratio 尔, combined carbon material. Novacor and plastics and other company launch. this material tool has very large tough property 极限, in 自动取出 bag application in has new force.
very low density PE resin （ density low 于0．910g/cc. ）也 in year 出现. VLDPES tool has flexible soft degree is LLDPE达不 to.
resin features generally in melt flow index and density. melt flow index can 反映出 resin molecular weight main/primary reaction temperature degree control. molecular weight and molecular weight distribution （MWD）无关. catalytic agent selection effect/influence MWD.
density copolymer use mono in polyethylene (PE) in concentrated degree 决定. copolymer use mono concentrated degree control short 支链数目（ its long degree 取决于 copolymer use mono type type ） from control resin density. copolymer use mono concentrated degree high, resin density low.
in structure upper, LLDPE in 支链 数目 and type type upper and LDPE different, high pressure LDPE has long 支链, property LDPE tool has short 支链.
in structure upper, LLDPE in short 支链数目 upper and HDPE different. HDPE short 支链数目 relatively less, therefore, is has more high density material.
LLDPE material features 受控于 it molecular weight, MWD and density.
LLDPE excellent 于LDPE, 归根结底取决 its applications. usually, in has application in use LLDPE production rigid property more strong/high product, although according to ATSM for low density material standards, LLDPE and LDPE density in 0．91?0．925 between.
LLDPE形 formed more high crystallization structure, is in long 支链. LLDPE relatively large crystallization property generate relatively high rigidity product. this type of relatively high crystallization degree make LLDPE and LDPE versus ratio, melting point improve/increase 10～15℃.
more high resistant strong/high degree, resistant property, resistant property and elongation increase is LLDPE features, make its especially suitable for made film. if use or 辛烯代替丁烯 as copolymer mono 体甚至连 impact resistant force and resistant property can to relatively large 改进. for/regarding same melt and density lower to resin, and 辛烯LLDPE resin in impact and property can upper improve/increase to 300％. and resin more long in between to 象“绳结” separation 子一样 function, 改进 化 combined material tough property.
use ring metal material catalytic agent production resin will tool has property can. more narrow MWD, copolymer mono distribution, has more good film transparent degree, property and impact strong/high degree, this and use 齐格勒 catalytic agent production LLDPE versus 似. in transparent degree this features upper, LLDPE tool has and LDPE versus disadvantages O LLDPE film degree and gloss degree is good, main/primary is it more high crystallization property formed film surface coarse degree. LLDPE resin transparent degree can through and a small amount of LDPE blending improvement.
processing
LDPE and LLDPE都 tool has good property or melt flow property. LLDPE has more small 剪切敏感 property, is it tool has narrow molecular weight distribution and short 支链.
in process in （例如挤塑）, LLDPE maintain more large viscosity, ratio same melt flow index LDPE difficult processing. in in, LLDPE more low 剪切敏感 property make polymer separation 子链 应 force more fast, and material property for ratio 改变 敏感 property decrease small.
in melt in, LLDPE in various speed rate lower usually tool has relatively low viscosity. is it will 不会象LDPE一样 in tensile generate hard 化. polyethylene (PE) rate increase ．LDPE显示出 viscosity increase, this is separation 子链缠结引起.
this type of phenomenon in LLDPE in 观察不出, is in LLDPE in less long make polymer 不缠结. this type of property can for film application important ．因 is LLDPE film in maintain high strength and tough property lower easy made more thin film. nLLDPE property can is “剪切时 rigid property ” and “延伸时 soft/flexible ”.
当 use LLDPE substitute/replace LDPE时 film equipment and conditions must 做修改. LLDPE high viscosity requirements machine has more large rate ．并 provide more high melt temperature degree and pressure.
模口隙距必 must add wide 以避免 due to generate high back pressure and melt fracture reduce output/production volume. LDPE and LLDPE generally 模口隙距 dimensions separation is O． 024～0． 040 in． and 0． 060－0． 10in.
LLDPE “延伸时 soft/flexible ” features in film process in is disadvantages. LLDPE blow molding film film 泡不象 LDPE that stability.
generally mono ring for LDPE stability use ．LLDPE has film requirements more di ring stability. use di ring cooling internal film can increase film stability property, meanwhile in high production rate lower improve/increase film production can force. remove film more good cooling outer, very more film production using/adopting and LDPE blending methods reinforcement LLDPE solvent upper, LLDPE can in has LDPE film equipment upper formed, 当LDPE blending material in LLDPE concentrated degree 达 50％时. processing 100％ LLDPE or LLDPE and LDPE blending material 时, using/adopting generally LDPE挤塑 machine, 必需改进 equipment.
according to machine lifespan, requirements can can is add wide 模口隙距, 改良风 ring, screw design more good extrusion, necessary increase electrical machine rate and 转矩. for/regarding injection molding application, generally 不需改进 equipment, processing conditions most 佳化.
rotational molding processing requirements LLDPE研 abrasion formed uniform pellets （35筛孔）. processing process use powder 末状LLDPE填满 mold, add hot di toward mold make LLDPE uniform distribution. cooling rear product from mold in 移出.
application  
LLDPE already to polyethylene (PE) large more 数传统 market, film, 模塑, pipe/tube and electrical cable. anti film is new development LLDPE market. film, types large type extrusion sheet/slice 材, used as waste 渣填埋 and waste material 池衬垫, anti 止渗漏 or 污染周围 区.
LLDPE film market, production bag 子, waste bag, elastic property packaging material, industrial use sleeve/set, 巾式衬 sleeve/set and material bag, this is utilizing strong/high degree and tough property rear this type of resin advantages. transparent film, 例如面包 bag, 一直由LDPE占统治 位, is it has more good degree. however, LLDPE and LDPE blending material will strong/high degree. resistant property and LDPE film rigid degree, significantly effect/influence film transparent degree.
injection molding and rotational molding is LLDPE most large 两 模塑 application. this type of resin excellent tough property and low temperature, impact strong/high degree upper waste material 箱, toys and cold device tool.
another, LLDPE high resistant ring force cracking property make its suitable for injection molding and type food contact cover/cap 子, rotational molding waste material container, material and chemical product 槽罐.
in pipe/tube and electrical cable coating in application market relatively small, in this 里LLDPE provide high strong/high degree and resistant ring force cracking property can meet/satisfy requirements. currently, LLDPE 65％－ 70％ used for made as film.
MITSUI CHEMICALS
ARLENTM Modified Polyamide 6T
特 color
极 good high temperature degree rigid hard:
due to its high 玻璃转变 temperature degree (125℃),ARLEN甚至 can in types high temperature degree gas in maintain high rigid hard, engine internal.
极 good chemical resistant
ARLEN显示 has polyamide (PA) resin most good chemical resistant.
very less dimensions to absorption need water:
to absorption need water ARLEN dimensions is PA66,which in less 于1/2 in has polyamide (PA) resin in most low.
injection molding
铸造 machine:
1.The铸造ARLEN requirements 一台铸造 machine electrical retardant (火焰抑 made agent and other grade) 腐蚀抵 resistant.
2. small machine by selection, this injection shot 一 卷 will is most large degree 插入容 amount in less 于10%.
mold:
1.A钢材 material resistant (火焰抑 made agent and other grade) 腐蚀抵 resistant for ARLEN mold construction material is need.
2.An large 约10μm孔 by requirements.
front drying:
in bag by again one-time dry rear, absorption wet gas 任何ARLEN resin.
drying conditions:110℃, 2～6hr.
ARLEN polyamide (PA) by by Mitsui chemical product development 6T, Inc.,taking铅 in world upper.
and ultra- grade engineering plastics that versus ratio high melting point (320℃) and high rigid hard water by 芳香 圆 ring to basic structure in achieve. meanwhile, water absorption 结果, this is polyamide (PA) low 点, already by decrease/reduce to most small.
三 series can use to application requirements:
A series: machine and structure separation;
AE series: for/regarding tribological application;
C/E series: electrical and electronics separation.
electrical and electronics separation application 例子:
SMT electronics separation, 诸如: connectors, 千斤顶, 开关, electrical 源终端,Various情况.
machine and structure application 例子:
as is engine 房间部 separation shch: 圆筒头 cover/cap 子, temperature device 情况, 油抽吸住房, liquid pressure system active 塞, make system separation cooling.

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