导热塑料PA1011物性及加工条件表
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PA广州奥特工程塑料专业提供各种尼龙注塑件加工,如:尼龙垫圈,尼龙密封环,尼龙轴套,尼龙套筒,尼龙管,尼龙齿轮,尼龙支撑环,尼龙导向环,尼龙轴承,尼龙滑轮,尼龙绝缘套,尼龙滑块等。
尼龙参数:密度:1.14颜色:白色/黑色/绿色/透明UL等级:HB持续工作温度:100度最高短期工作温度:160度尼龙原料根据其不同的特点分为:尼龙6(PA6),尼龙66(PA66),PA610,PA612, PA11,PA12,PA1010 。
其次还有玻纤增强尼龙和碳纤增强尼龙。
增强尼龙材料:玻纤增强尼龙,石墨增强尼龙及碳纤维增强尼龙等。
尼龙具有很高的机械强度,软化点高,耐热,摩擦系数低,耐磨损,具有自润滑性,吸震性和消音性,耐油,耐弱酸,耐碱和一般溶剂。
电绝缘性好,有自熄性,无毒,无臭,耐候性好等。
尼龙的熔体流动性好,故其制品壁厚可小到1mm。
奥特工程塑料公司专业生产各种规格的PPA高温尼龙注塑件,其制品有:高温尼龙轴套、高温尼龙轴承、高温尼龙套筒、高温尼龙密封圈、高温尼龙支撑环、高温尼龙导向环、高温尼龙滑块、高温尼龙齿轮、高温尼龙螺丝、高温尼龙螺母、高温尼龙螺栓、高温尼龙垫片、高温尼龙绝缘套、高温尼龙滑轮、高温尼龙轴承座、高温尼龙皮带轮等。
参数颜色:白色工作温度:200度UL等级:V-0特性PPA-聚对苯二甲酰对苯二胺(Polyphthalamide)属于高刚性聚合物,其分子结构具有高度的对称性和规整性,大分子链之间有很强的氢键。
该聚合物具有高强度、高模量、耐高温、低密度、热收缩性小、尺寸稳定性好等特点,能制成高强度、高模量纤维(杜邦DUPONT公司的纤维商品名:Kevlar,是军备防弹服材料)奥特工程塑料公司专业生产各种规格的含油尼龙加工件,其制品有:含油尼龙轴套、含油尼龙轴承、含油尼龙套筒、含油尼龙密封圈、含油尼龙支撑环、含油尼龙导向环、含油尼龙滑块、含油尼龙齿轮、含油尼龙螺丝、含油尼龙螺母、含油尼龙螺栓、含油尼龙垫片、含油尼龙绝缘套、含油尼龙滑轮、含油尼龙轴承座、含油尼龙皮带轮等。
P ROVISIONAL D ATA S HEETG RIVORY HTG RIVORY XE 4027BLACK 9916Product descriptionGrivory XE 4027 black 9916 is a 30% glass-fibre reinforced flame retardant (UL 94 V-0) engineering thermoplastic material based on a semicrystalline, partially aromatic co-polyamide.Grivory XE 4027 black 9916 is free of halogens and red phosphorus.RoHS: Grivory XE 4027 black 9916 is in compliance with RoHS (2002/95/EC, Re-striction of Hazardous Substances). WEEE:Parts produced from Grivory XE 4027 black 9916 are not subject to "selec-tive treatment" according the Directive 2002/96/EC on Waste Electrical and Elec-tronic Equipment.ISO polymer designation: PA 10T/XASTM designation: PPA, polyphthalamide The main distinguishing features of Grivory HT-PPA, when compared to other poly-amides, are its good performance at high temperatures providing parts which are stiffer, stronger, have better heat distortion and dimensional stability as well as excel-lent chemical resistance and low moisture absorption.Grivory XE 4027 black 9916 is especially suitable for injection moulded components in electrical and electronic applications which require a flame class acc. UL 94 V-0. The material is suitable for lead-free SMT reflow soldering acc. i.e. JEDEC J-STD-020C (peak temperature 260°C). Compo-nents conforming to JEDEC MSL1 are achievable.PROPERTIESMechanical Properties Standard Unit State Grivory XE 4027black 9916Tensile E-modulus 1 mm/min ISO 527 MPa drycond.10'00010'000Tensile strength at break 5 mm/min ISO 527 MPa drycond.115110Elongation at break 5 mm/min ISO 527 % drycond.1.51.5Impact strength Charpy, 23°C ISO 179/2-1eU kJ/m2drycond.3535Impact strength Charpy, -30°C ISO 179/2-1eU kJ/m2drycond.3535Notched impact strength Charpy, 23°C ISO 1792-/1eA kJ/m2drycond.66Notched impact strength Charpy, -30°C ISO 179/2-1eA kJ/m2cond. 6Ball indentation hardness ISO 2039-1 MPa drycond.225225Thermal PropertiesMelting point DSC ISO 11357 °C dry 295 Heat deflection temperature HDT/A 1.80 MPa ISO 75 °C dry 265 Heat deflection temperature HDT/C 8.00 MPa ISO 75 °C dry 175 Thermal expansion coefficient long. 23-55°C ISO 11359 10-4/K dry 0.2 Thermal expansion coefficient trans. 23-55°C ISO 11359 10-4/K dry 0.65 Maximum usage temperature long term ISO 2578 °C dry 150Electrical PropertiesDielectric strength IEC 60243-1 kV/mmdrycond.3333Comparative tracking index CTI IEC 60112 - cond. 600Specific volume resistivity IEC 60093 Ω · m drycond.109109Specific surface resistivity IEC 60093 Ωcond. 1011General PropertiesDensity ISO 1183 g/cm3 dry 1.41 Flammability (UL 94) 0.4 - 3.2 mm ISO 1210 rating - V-0IEC GWFI IEC 60695-2-12 °C - 960 Glow wire temperature (3mm)IEC GWIT IEC 60695-2-13 °C 775 Water absorption 23°C/saturated ISO 62 % - 1.5 Moisture absorption 23°C/50% r.h. ISO 62 % - 0.6 Linear mould shrinkage long. ISO 294 % dry 0.3 Linear mould shrinkage trans. ISO 294 % dry 1.0 Product nomenclature acc. ISO 1874: PA 10T/X, MHF, 11-100, GF30Information on Injection Moulding ofGrivory XE 4027 black 9916This technical data sheet for Grivory XE 4027 black 9916 provides you with useful information on material preparation, machine requirements, tooling and processing.MATERIAL PREPARATIONGrivory XE 4027 black 9916 is delivered dry and ready for processing in sealed packaging. Pre-drying is not necessary.StorageSealed, undamaged bags can be kept over a long period of time in storage facilities which are dry, protected from the influence of weather and where the bags can be protected from damage.Handling and SafetyDetailed information can be obtained from the material safety data sheet (MSDS) which can be requested with every material order.Drying During its manufacturing process Grivory XE 4027 black 9916 is dried and packed with a moisturecontent of ≤ 0.10%. Should the packaging become damaged or the material is left open too long, then the material must be dried. A too high moisture content can be shown by a foaming melt and silver streaks on the moulded part. The drying can be done as follows:Temperature max. 80°CTime 4 - 12 hoursDew point -40°CTemperature max. 100°CTime 4 - 12 hoursDrying time If there is only little evidence of foaming of the melt or just slight silver streaks on the part, then the above mentioned minimal drying time will be suffi-cient. Material, which is stored open over days shows strong foaming, unusually easy flowing, streaks and rough surface on the moulded part. Then the maximal drying time is required.Silver streaks can also be caused by overheating of the material (over 350°C) or by too long melt residence time in the barrel.Drying temperaturePolyamides are affected by oxidation at tempera-tures above 80°C in the presence of oxygen. Visible yellowing of the material is an indication of oxida-tion. Hence temperatures above 80°C for desiccant dryers and temperatures above 100°C for vacuum ovens should be avoided. In order to detect oxida-tion it is advised to keep a small amount of granu-late (light colour only !) as a comparison sample.At longer residence times (over 1 hour) a hopper dryer (80°C) is useful.Use of RegrindGrivory XE 4027 black 9916 is a thermoplastic material. This allows recycling of sprues, runners and rejected components in the running processIt is recommended to add a maximum of 25% re-grind as long as the requirements on the final part allow the addition of regrind.To ensure a trouble free processing, special pre-caution has to be taken by the moulder. Followingpoints have to be kept in mind: • Avoid moisture absorption of the regrind (oth-erwise drying is necessary)Contamination by foreign material such as other polymers, dust or oil has to be avoided Property and colour changes of the part can be controlled with proper handling measures. MACHINE REQUIREMENTSGrivory XE 4027 black 9916 can be processed eco-nomically on all injection moulding machines suit-able for polyamides. Screw Wear and corrosion protected, 3-zone universal screws with check valves are recommended.Length 18 D - 22 D Compression ratio 2 - 2.5Screw Desiccant dryer Vacuum ovenShot VolumeThe metering stroke must be longer than the length of the check valve (without decompression dis-tance).Shot volume = 0.5 - 0.8 x (max. shot volume)HeatingAt least three separately controllable heating zones, able of reaching cylinder temperatures up to 350°C are required. A separate nozzle heating is necessary. The cylinder flange temperature must be controllable (cooling).NozzleOpen nozzles are simple, allow an easy melt flow and are long lasting. There is, however, the danger that during retraction of the screw after injection, air maybe drawn into the barrel (decompression). For this reason, needle shut-off nozzles are often used.Clamping ForceAs a rule of thumb the clamping force can be esti-mated using the following formula:TOOLINGThe design of the mould tool should follow the general rules for glass fibre reinforced thermo-plastics.For the mould cavities common mould tool steel quality (e.g. hardened steel) which has been hard-ened to level of 56 - 65 HRC is necessary. We recommend additional wear protection in areas of high flow rates in the tool (e.g. pin point gates, hot runner nozzles).Demoulding / Draft AngleParts moulded from Grivory HT are setting very quickly showing excellent dimensional stability. Asymmetric demoulding and undercuts are to be avoided. It is favourable to foresee high numbers of large ejector pins or a stripper plate. Demoulding draft angles between 1 to 5° are acceptable. The following values can be considered:(VDI 3400) 12 1518 21 24 27 Depth of roughness (µm) 0.4 0.6 0.8 1.1 1.6 2.2 Demoulding angle (%) 11 1.1 1.2 1.3 1.5(VDI 3400) 30 33 36 39 42 45 Depth of roughness (µm) 3.2 4.5 6.3 9 13 18 Demoulding angle (%) 1.822.5345VentingIn order to prevent burn marks and to improve the weld line strength, proper venting of the mould cav-ity should be provided. Venting channels on the parting surface with dimensions of depth 0.02 mm and width 2 - 5 mm are recommended.Gate and RunnerTo achieve an optimal mould-fill and to avoid sink marks, a central gate at the thickest section of the moulding is recommended. Pin point gate (direct) or tunnel gates are more economical and more com-mon with technical moulding.To avoid premature solidification of the melt and difficult mould filling, the following points should be considered:0.8 x thickest wall section of the injectionmoulding part1.4 x thickest wall section of the injection moulding part (but minimum 4 mm)PROCESSINGMould Filling, Post Pressure and DosingThe best surface finish and a high weld line strength are achieved with a high injection speed and when a sufficiently long post pressure is em-ployed.The injection speed should be chosen to be re-duced towards the end of the filling process in order to avoid overheating and burning. For dosing at low screw speed and pressure the cooling time should be fully utilised.Selecting the injection unit Gate diameterRunner diameterBasic Machine SettingsIn order to start up the machines for processing Grivory XE 4027 black 9916, following basic set-tings can be recommended:Flange 80°CZone 1 305 - 320°CZone 2 305 - 320°CZone 3 305 - 320°CNozzle 305 - 320°CTool 110 - 150°CMelt 300 - 330°CInjection speed medium - highHold-on pressure (spec.) 500 - 800 barDynamic pressure (hydr.) 5 - 15 barPeripheral screw speed 0.1 - 0.3 m/s Start-up and PurgingForeign materials in the cylinder should be removed with suitable purging materials. Hot-runner systems should be purged likewise. Glass fibre reinforced polyamide 66 is a suitable “bridging material”. Cylinder heating should start with a clean, product-free screw, starting from the temperature level of the “bridging material” of 300°C up to the required temperature level of 300-330°C (see processing data).After at least three full dosings (free-shots) - apply-ing the shortest possible residence time - the start up procedure can be implemented.After completion of production with Grivory HT the screw, cylinder and melt distribution system should be cleaned out thoroughly.ConditioningThe dimensions and the mechanical properties of Grivory HT products are only marginally influenced by moisture absorption. For testing purposes, parts can be stored in a climatic chamber until an in-crease in weight of 1 % has been achieved. In order to avoid stress through swelling, conditioning in hot water is to be avoided. CUSTOMER SERVICESEMS-GRIVORY is a specialist for polyamide syn-thesis and polyamide processing. Our customer services are not only concerned with the manufac-turing and supply of engineering thermoplastics but also provide a full of technical support program: • Rheological design calculation / FEA• Prototype tooling• Material selection• Processing support• Mould and component designWe are happy to advise you. Simply call one of our sales offices.The recommendations and data given are based on our experience to date, however, no liability can be assumed in connection with their usage and processing.Generated / updated: SEK / 07.2008This version replaces all previous product specific data sheets.Temperatures Speeds / Pressures。
尼龙(PA)材料的特性一尼龙简介尼龙(Nylon,Polyamide,简称PA)是指由聚酰胺类树脂构成的塑料。
此类树脂可由二元胺与二元酸通过缩聚制得,也可由氨基酸脱水后形成的内酰胺通过开环聚合制得,与PS、PE、PP等不同,PA不随受热温度的升高而逐渐软化,而是在一个靠近熔点的窄的温度范围内软化,熔点很明显,熔点:215-225℃。
温度一旦达到就出现流动。
PA的品种很多,主要有PA6、PA66、PA610、PA11、PA12、PA1010、PA612、PA46、PA6T、PA9T、MXD-6芳香醯胺等.以PA6、PA66、PA610、PA11、PA12最为常用.尼龙类工程塑料外观上都呈现为角质、韧性、表层光亮、白色(或乳白色)或微黄色、透明或半透明的结晶性树脂,它容易被著成任一种颜色。
作为工程塑料的尼龙分子量一般为1.5-3万。
它们的密度均稍大于1,密度:1.14-1.15g /cm3。
拉伸强度:> 60.0Mpa。
伸长率:> 30%。
弯曲强度: 90.0Mpa 。
缺口冲击强度:(KJ/m2) > 5。
尼龙的收缩率为1%~2%. 需注意成型后吸湿的尺寸变化。
吸水率 100% 相对吸湿饱和时能吸8%.使用温度可-40~105℃之间。
熔点:215-225℃。
合適壁厚2-3.5mm. PA的机械性能中如抗拉抗压强度随温度和吸湿量而改变,所以水相对是PA的增塑剂,加入玻纤后,其抗拉抗压强度可提高2倍左右,耐温能力也相应提高,PA本身的耐磨能力非常高,所以可在无润滑下不停操作,如想得到特別的润滑效果,可在PA中加入硫化物。
二 PA性能的主要优点有:1. 机械强度高,韧性好,有较高的抗拉、抗压强度。
比拉伸强度高于金属,比压缩强度与金属不相上下,但它的刚性不及金属。
抗拉强度接近于屈服强度,比ABS 高一倍多。
对冲击、应力振动的吸收能力强,冲击强度比一般塑料高了许多,并优于缩醛树脂。
2. 耐疲劳性能突出,制件经多次反复屈折仍能保持原有机械强度。
荷兰DSM PA6 1010C2物理特性及注塑工艺参数加工工艺物理特性参数数据来源:pom荷兰DSM PA6 1010C2物理特性及注塑工艺参数物理特性简介:加工方法:注射成型物理性能干燥调节后的单位制测试方法:密度1.14 -- g/cm³ ISO 1183熔流率(230°C/2.16 kg) 48 -- g/10 min ISO 1133溶化体积流率(MVR)(230°C/2.16 kg) 47.0 -- cm³/10min ISO 1133收缩率ISO 294-4横向流量: 3.00 mm 1.3 -- %流量: 3.00 mm 1.2 -- %吸水率(平衡, 23°C, 50% RH) 3.5 -- % ISO 62机械性能干燥调节后的单位制测试方法:拉伸模量3100 1000 MPa ISO 527-2拉伸应力(屈服) 80.0 40.0 MPa ISO 527-2拉伸应变(屈服) 5.2 21 % ISO 527-2断张率28 250 % ISO 527-2弯曲模量2900 -- MPa ISO 178弯曲强度113 38.0 MPa ISO 178冲击性能干燥调节后的单位制测试方法:简支梁缺口冲击强度(23°C) 3.0 31 kJ/m² ISO 179简支梁缺口冲击强度(23°C) 无断裂无断裂 ISO 179热性能干燥调节后的单位制测试方法:热变形温度0.45 MPa, 未退火167 -- °C ISO 75-2/B1.8 MPa, 未退火59.0 -- °C ISO 75-2/A线形膨胀系数ISO 11359-2流动0.000070 -- cm/cm/°C横向0.000080 -- cm/cm/°C电气性能干燥调节后的单位制测试方法:表面电阻率2.0E+14 -- ohms IEC 60093体积电阻率2.0E+15 -- ohm·cm IEC 60093相对电容率IEC 60250100 Hz 4.00 --1 MHz 4.00 --耗散因数IEC 60250100 Hz 0.011 --1 MHz 0.023 --漏电起痕指数600 -- V IEC 60112耐电强度(1.00 mm) 27 -- kV/mm IEC 60243-1”相关文献:防水材料其他原料的数据:日本东丽 PA6 塑胶原料 1056K48物理特性及加工工艺参数加工工艺物理特性参数美国首诺 PA66 塑胶原料 909物理特性及加工工艺参数加工工艺物理特性参数德国拜耳 PC 塑胶原料 DP9 9353物理特性及加工工艺参数加工工艺物理特性参数沙伯基础创新 PA6 NY6GP 沙伯沙伯基础创新(GE)(LNP)加工工艺及物理特性参数加工工艺物理特性参数PA46 塑胶原料 TE341 荷兰DSM 加工工艺参数加工工艺物理特性参数法国阿科玛 PA12 塑料原料 AMN P20TLD物理特性及电气特性加工工艺物理特性参数。
PA66101F杜邦DUPONT物性数据表:杜邦工程聚合物公司Zytel®101F NC010-PA66-美国美国杜邦工程聚合物公司134********久隆塑胶原料Zytel®尼龙树脂的共同特征为:包括机械和物理性能,如高的机械强度,硬度和韧性的平衡优异,良好的高温性能,良好的电和燃烧性能,良好的耐磨性和耐化学性。
Zytel®尼龙树脂通常用于要求苛刻的应用在汽车,家具,家用电器,体育用品和建筑行业。
ZYTEL®101F是一个注塑成型的润滑聚酰胺66。
这是适合快速的生产周期和高效率的应用程序。
典型应用:长流路径或要求的几何形状,如扎带,连接器,插头,齿轮和轴承的精密零件。
密度(73°F)1140公斤/立方米ASTM D792吸水率(24小时) 1.2%ASTM D570模塑收缩率(平行)140/*%ISO294-4,2577模塑收缩率(垂直)130/*%ISO294-4,2577拉伸强度83兆帕ASTM D638屈服应力83兆帕ASTM D638屈服伸长率4%ASTM D638断裂伸长率50%ASTM D638弯曲模量2800兆帕ASTM D790洛克硬度R113-ASTM D785悬臂梁缺口冲击强度(1/8)的0.053千焦耳/米ASTM D256低温悬臂梁缺口冲击强度(低温度)0.032千焦耳/米ASTM D256温度-40°C ASTM D256UL94燃烧性V-2的-UL94测试厚度 1.5毫米-DTUL@66PSI210°C ASTM D648DTUL@264磅65°C ASTM D648熔点263°C ASTM D3418电介质强度(短时)16.5千伏/毫米ASTM D149耗散因素(1兆赫)0.02-ASTM D150电介质常数(1兆赫) 3.7-ASTM D150表面电阻率1E14欧姆ASTM D257体积电阻率1E15欧姆·厘米ASTM D257吸水性8.5/*%类似ISO62吸湿性260/*%类似ISO62密度1140/-公斤/立方米ISO1183熔体密度970公斤/立方米-熔体0.16W/(M K)-熔体的比热2790J/(千克K)-有效导热率一5E-8平方米/秒-喷射温度190°C-PA66101F美国杜邦注塑成型参数:干燥推荐=是,如果水分含量超过了推荐的树脂干燥温度为80°C干燥时间,除湿机=2-4小时处理水分含量<0.2%熔体温度处理最佳=290°C的熔融温度范围=280模具温度-300°C的最佳=70°C模具温度范围=50-90°Ç螺丝最大切向速度:0.4米/秒的流量前速度:300毫米/秒,保持压力最佳:85兆帕保持压力范围:50-100返回兆帕压力:低压保压时间:4秒/毫米最大保持时间:15分钟。
注塑部材料性能总结(按供应商牌号归类)尼龙 PA旭化成Leona1.材料特性聚酰胺(PA),俗称尼龙,是一种综合性能较好的工程塑料,PA的品种繁多,包括PA6、PA66、PA12、PA46、PA6T等。
不同的PA结构上有一些差别,但都含有酰胺基团。
如:PA66:2.成型特性各个不同等级的Leona Pa的成型条件可参照下表:无增强型阻燃级无强型玻纤增强级玻纤增强特殊PA66阻燃级玻纤增强型非卤素阻燃级玻纤增强型等级1300S1302S1402S1402SH1300F1402F15001502S1700S17029400SFR200 FR370 13G1514G151300G1402G13G4313G2514G2514G3314G5054G3354G4393G3390G3390G5090G5590G6091G40FG170(15%GF)FG171(20%GF)FG172(25%GF)FG173(30%GF)FH772(25%GF)干燥条件温度:80℃~90℃时间:2~3小时成型条件熔体温度270~290℃250~260℃265~275℃275~295℃275~295℃270~280℃270~280℃模温75~85℃75~85℃75~85℃75~85℃85~95℃75~85℃75~85℃由于尼龙有较强的吸湿能力,故成型前一定要干燥,要求成型前水份含量在0.2%以下。
如果材料干燥不充分,在螺杆中会有打滑,熔不到胶的现象。
采用了铝薄密封包装的材料在包装完好的情况下水份都是达标的,可以直接使用。
一般的都应该在推荐的温度下成型,过高的成型温度将导致流涎、银纹、材料降解而使制品变脆等不良现象,过低的温度易形成塑化不良。
1. 工艺特性1)尼龙有着从空气中吸收水分的倾向,吸水的程度因品种不同而有差异。
2)除透明尼龙外,尼龙类塑料大都为结晶形聚合物,结晶度一般在20%~30%之间。
3)尼龙的流动性好,温度与压力对尼龙熔体的流动性都有明显的影响,在成型过程中应严格控制成型工艺参数,以防溢料或物料阻塞。
1、PA12 聚酰胺12或尼龙12化学和物理特性PA12是半结晶-结晶热塑性材料, PA12有很好的电气绝缘性,并且不会因潮湿影响绝缘性能,有很好的抗冲击性机化学稳定性,PA12对强氧化性酸无抵抗能力。
粘性主要取决于湿度、温度和储藏时间,它的流动性很好。
收缩率0.5-2%,主要取决于材料品种、壁厚及其它工艺条件。
典型用途水量表和其他商业设备,电缆套,机械凸轮,滑动机构以及轴承等。
注塑模工艺条件干燥条件:85℃/4~5小时,加工之前应保证湿度在0.1%以下;加工温度:240~300℃;普通材料不要超过310℃,阻燃材料不要超过270℃。
模具温度:未增强型材料为30~40C,薄壁、大面积元件及增强型材料为80~100C,精确地控制模具温度对PA12来说是很重要的。
注射压力:最大可到1000bar(建议使用低保压压力和高熔化温度)。
注射速度:高速(对于有玻璃添加剂的材料更好些)。
流道和浇口:未加添加剂的材料,流道直径应在3mm左右,增强型材料要求5~8mm的大流道直径,流道形状应当全部为圆形,注入口尽可能短,可以使用多种形式的浇口;大型塑件不要使用小浇口(这是为了避免对塑件过高的压力或过大的收缩率),浇口厚度最好和塑件厚度相等,如果使用潜入式浇口,建议最小的直径为0.8mm。
热流道模具很有效,但是要求温度控制很精确以防止材料在喷嘴处渗漏或凝固。
如果用热流道,浇口尺寸应当比冷流道要小一些。
2、PA6 Nylon6聚己内酰胺化学和物理特性PA6本色原料呈乳白色透明或半透明状颗粒,化学物理特性和PA66很相似,然而,它的熔点较低,而且工艺温度范围很宽。
它的抗冲击性和抗溶解性比PA66要好,但吸湿性也更强。
因为塑件的许多品质特性都要受到吸湿性的影响,因此使用PA6设计产品时要充分考虑到这一点。
为了提高PA6的机械特性,经常加入各种各样的改性剂。
玻璃就是最常见的添加剂,有时为了提高抗冲击性还加入合成橡胶,如EPDM和SBR等。
导热塑料配方设计分享到:0发布时间:2013/10/29 20:56:55大中小来源:作者:王文广教授级高级工程师深圳市高分子行业协会秘书长大多数金属材料的导热性较好,可用于散热器、热交换材料、余热回收、刹车片及印刷线路板等场合。
但金属材料的耐腐蚀性、成型加工性不好,限制了一些领域的应用,具体如化工生产和废水处理中的热交换器、导热管、太阳能热水器及蓄电池冷却器等。
导热塑料概述导热塑料是指具有较高导热系数的一类高分子材料,一般其导热系数大于1W/m.K。
大多数金属材料的导热性较好,可用于散热器、热交换材料、余热回收、刹车片及印刷线路板等场合。
但金属材料的耐腐蚀性、成型加工性不好,限制了一些领域的应用,具体如化工生产和废水处理中的热交换器、导热管、太阳能热水器及蓄电池冷却器等。
塑料的耐腐蚀性和加工性能都很好,但与金属材料相比,塑料材料的导热性能不好,导热性最好的HDPE导热系数也仅有0.44 W/m。
各类塑料的导热系数可具体参见表1所示。
塑料的低导热性,限制了其应用范围,如不可用于各类摩擦起热或需要及时散热的场合。
导热类塑料可用于中央空调系统、太阳能热水器、建筑供热管道、化工腐蚀介质的传热材料、土壤加热器、商业仪器、自动化设备、齿轮、轴承、垫片、移动电话、电子器件、发电机罩及灯罩等场合。
导热塑料主要用于换热工程中如散热器、换热管等,电子元器件的散热如线路板、LED封装材料等。
导热塑料配方设计导热材料的种类按照导热材料是否具有导电性能,将导热材料分为导电导热材料和绝缘导热材料两大类。
★导电导热材料凡是能够导电的材料都具有导热性能,只是导热程度大小的不同,目前常用的导电导热材料有:A 炭素材料炭素材料包括碳纤维、石墨、石墨烯、炭黑、碳纳米管,导热效果很好,是目前主要的导热材料,其中以碳纤维、石墨和炭黑应用最多,缺点为黑色。
石墨的种类很多,一般多选用导电和导热都高的石墨品种,具体如磷片石墨、可膨胀石墨、膨胀石墨等。
通用尼龙物性表尼龙(PA)材料的特性一尼龙简介尼龙(Nylon,Polyamide,简称PA)是指由聚酰胺类树脂构成的塑料。
此类树脂可由二元胺与二元酸通过缩聚制得,也可由氨基酸脱水后形成的内酰胺通过开环聚合制得,与PS、PE、PP等不同,PA不随受热温度的升高而逐渐软化,而是在一个靠近熔点的窄的温度范围内软化,熔点很明显,熔点:215-225℃。
温度一旦达到就出现流动。
PA的品种很多,主要有PA6、PA66、PA610、PA11、PA12、PA1010、PA612、PA46、PA6T、PA9T、MXD-6芳香醯胺等.以PA6、PA66、PA610、PA11、PA12最为常用.尼龙类工程塑料外观上都呈现为角质、韧性、表层光亮、白色(或乳白色)或微黄色、透明或半透明的结晶性树脂,它容易被著成任一种颜色。
作为工程塑料的尼龙分子量一般为1.5-3万。
它们的密度均稍大于1,密度:1.14-1.15g/cm3。
拉伸强度:>60.0Mpa。
伸长率:>30%。
弯曲强度:90.0Mpa 。
缺口冲击强度:(KJ/m2) >5。
尼龙的收缩率为1%~2%. 需注意成型后吸湿的尺寸变化。
吸水率100% 相对吸湿饱和时能吸8%.使用温度可-40~105℃之间。
熔点:215-225℃。
合適壁厚2-3.5mm. PA的机械性能中如抗拉抗压强度随温度和吸湿量而改变,所以水相对是PA的增塑剂,加入玻纤后,其抗拉抗压强度可提高2倍左右,耐温能力也相应提高,PA本身的耐磨能力非常高,所以可在无润滑下不停操作,如想得到特別的润滑效果,可在PA中加入硫化物。
二 PA性能的主要优点有:1. 机械强度高,韧性好,有较高的抗拉、抗压强度。
比拉伸强度高于金属,比压缩强度与金属不相上下,但它的刚性不及金属。
抗拉强度接近于屈服强度,比ABS 高一倍多。
对冲击、应力振动的吸收能力强,冲击强度比一般塑料高了许多,并优于缩醛树脂。
2. 耐疲劳性能突出,制件经多次反复屈折仍能保持原有机械强度。