密封胶性能指标

POLYURETHANE SEALANTS聚氨酯密封胶HYBRID SEALANTS混合密封胶 Cures under the effect of atmospheric humidity湿气下固化 Good adhesion on a lot of substrates 对大多数材料具有很好的粘接强度 Surface treatment are often necessary (cleaner, primer) 经常需要表面处理（清洗剂，底涂剂） Sensitive to UV radiation (yellowing for white references) 对紫外线较为敏感（易黄变） Compatibility with paints与涂料兼容性 - carry out tests beforehand with solvent based (alkyde)溶剂型涂 料需做测试 - OK with water based paint水性涂料兼容 Contain free Isocyanate. Do not contain solvent or a small quantity of solvent含异氰酸酯自由基，不含溶剂或含少量溶剂 Application temperature : 5C 35C应用温度：5-35 Skin formation time 20 to 240 minutes表干时间20-240 Temperature resistances:耐温性 -30C / + 80C : 3M 525 / 3M 540 -30C / + 90C : 3M 550 / 3M 551 / 3M 560 / 3M 590 Reduction of mechanical performances after 50 at 160C.50-160会 降低其机械性能 Standards and quality质量标准 SNJF : 3M 525 / 3M 540 Roue Marine : 3M 540 3M 550 / 3M 551 Harmful : 3M 550 / 3M 551 / 3M 560 / 3M 590 PU can be formulated to reach higher mechanical resistance聚氨酯 具有更好的机械强度 Cures under the effect of atmospheric humidity湿气下固化 Good adhesion on a lot of substrates对大多数材料具有很好的粘 接强度 Surface treatment are limited (most hydrolysis sensitive ) 很少需要表面处理（对水解敏感） UV resistance抗紫外性能 Compatibility with paints - carry out tests beforehand with solvent based (alkyde)溶剂型涂 料需做测试 - OK with water based paint水性涂料兼容 Do not contain isocyanate, PVC, solvent 不含异氰酸酯，PVC，溶剂 Application temperature : 5C 35C应用温度 Lower skin formation time较短的表干时间 Temperature resistances耐温性 -40C / + 100C : 3M 760 / 3M 4000 UV -30C / + 90C : 3M 740 Mechanical performances are not degraded after 50 at 200C. 50-200内不会降低机械性能 Standards and quality 质量标准 Roue Marine - Marine Wheel 3M 760 / 3M 4000 UV Not classified as hazardous不含有毒物质 Hybrids are more expensive (process and raw material)混合密封 胶价格较高（过程和原材料） Sealant properties密封胶性能 Comparison对比: PU vs. Hybrids vs. Silicones 聚氨酯密封胶，混合密封胶，硅酮密封 胶 ?Overview: 3 Main Types of Sealants: Flexible Elastomers ?SiliconesPURsMS Hybrids ?GeneralFlexibleVery FlexibleRelatively stiff ?Movement?to 20%to 25%to 15% ?Paintable?NoGood*wet on wet ?Releaseacetic acid1CO2*Methanol CH3OH * ?Adhesionnot EPDM rubberNeed pre treating Wide range ?RemarksPricing !Auto industry!Market growing / Not classified * After skin has formed表干后 1.Neutralised on concrete- does not stick与混凝土不发生反应 2.CO2causes bubbles with fast curing, elevated temperatures 在升温快速固化中CO2会产生气泡 1.Methanol stops PUR curing- hybrids and PURs not cured together 甲醇会阻止聚氨酯胶的固化，导致混合胶和聚氨酯胶不能同时固化 PAINTABILITY可着色性 Hybrids / MS Sealants are compatibles with most water based paints混合型密封胶与水性涂料有很好的兼容性 carry out tests beforehand with solvent based (alkyde)溶剂型涂料需预先做兼容性测试 ?Overview回顾: 3 Main Types of Sealants: Flexible Elastomers三种密封胶：弹性体 ?Silicones硅酮PURs聚氨酯MS Hybrids混合胶 ?Shore A硬度15-3515-6025-60 ?Mod Brk黏度to 1,2 MPato 2,5 MPa*to 2,5 MPa ?Elongation延展性to 450%to 1000%to 400% ?Skin time表干时间10 min. up to 1,5 hr30 min. / 6 hr reduced bond strength Inconsistent bond line = compromised sealing 表面接触少，降低粘接强度 粘接不连续=降低密封效果 ?Negligible bubbling occurs at 23C; 50% RH- increase of either T!C or RH can produce bubbles- humid climates and wet environments increase probability of bubbling. ?23，50%条件下气泡很少；升高温度或湿度会增加气泡；潮湿的环境也会增加气泡 ?Products specially modified- reduced isocyanate (-N=C=O) content - to decrease bubble formation. “VLS”: Very Long Skinning” product for humid environments ?经特殊改性以减少氰基团数量，能有效降低气泡的形成 ?VLS是“非常长的表干时间”适合潮气环境的产品 ?Slower curing (often lower Shore A) = decreased bubbling ?固化时间慢（通常为较低硬度）=降低气泡 ?Other products with longer open times also made for humid environments and / or higher temperature applications which promote bubbling. Bubble-free products available for every TC / RH combination ?开放时间较长的产品也有利于潮湿环境下应用，而高温下应用却易于产生气泡。 无气泡产品适合任意温度湿度环境下应用。 OpenTime开放时间开放时间开放时间开放时间 ? Overview: Definition of terms- “Open Time” 概述：开放时间的定义 ?Open TimeSealant = Time between extrusion and bond assembly ?开放时间（密封胶）=挤出到粘接装配 ?Open TimeSealant = Skin Formation Time / 2 ?开放时间（密封胶）=表干时间/2 Rate of cure固化速度固化速度固化速度固化速度 Test to assess the thickness of the joint which is cured in a given time. 评估测试：在给定时间内测试接口固化厚度 The value is expressed in mm after 24h on the Technical Data Sheet. Example: 3 mm/24h (73F/50%RH) 技术参数中的测试结果用24小时后毫米数来表示 举例：3 mm/24h (73F/50%RH) On a thickness joint of 10mm, 24 hours after the sealant application, only the 3 first millimeters are cured at the surface of the joint. The 7 other millimeters are uncured 在一个10mm厚的密封接口中，24h后只有3mm厚已经 固化，而另外7mm没有固化 A measurement is carried out every day to follow the evolution in the time up to a complete curing 有一种测量方式是观察每一天 固化情况直至完全固化 Cured elastomer 已固化的弹性体 Uncured paste 未固化的胶糊 Cure rate after 24 hours: 4,0 mm Cure rate after 48 hours: 6,5 mm # 8,0 mm 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 05101520 3M 740 3M 760 Sprayable hybrid Days Cure rate (mm) CURE RATE EVOLUTION IN THE TIME固化固化固化固化 速度虽时间变化关系速度虽时间变化关系速度虽时间变化关系速度虽时间变化关系 Shore A hardness Measurement of hardness by means of a durometer hardness gauge.硬度一般用硬度计来测量 A thin sharp and hard piece is pressed against a sealant bead (or cord) specimen that is a 6 mm diameter After 3 seconds, a numerical reading is taken from the dial. 用一个较硬的锋利薄片压在密封胶上3s，该样品要 求是液滴状或条状，直径为6mm，显示结果即为硬度值 Scale 0 to 100. (Sealant example: Cured polyurethane sealant usually show a hardness in the 15 to 70 range) See DIN Method 53505.密封胶举例：通常固化完毕后的密封胶邵氏硬度在15至70范围内。 请见DIN 53505 Shore Hardness A : PU, hybrid and silicone sealants 邵氏硬度A： 聚氨酯，混合体，硅酮密封胶 Shore Hardness D : PU 1K and 2K glues 邵氏硬度D：聚氨酯 1K和2K胶水？ Tensile strength / Elongation at break / 100 % Modulus拉伸强度拉伸强度拉伸强度拉伸强度/拉伸率拉伸率拉伸率拉伸率/100%模量模量模量模量 Traction Test carried out according to ASTM D412 Method 拉伸试验标准采用ASTM D412 Tensile strength: the pulling force in pounds necessary to break a given sample divided by the area of the cross section in square inches. 拉伸强度：将一定横向面积的样品拉伸至断裂为止所需要的强度，LB/inch Results of tensile strength and 100% modulus are expressed in MPa or PSI.拉伸强度和100%模量单位MPa和PSI MPa: MegaPascal (1 MPa=1 N/mm)PSI: Pound Per Square Inch (145 PSI 1 MPa) Results of elongation at break are expressed in percent. 断裂延展率是以百分比来表述 Mechanical characteristics which help to compare the sealants together 机械载荷性能能很好比较这些密封胶的性能 Low modulus sealant : ex. 3M 525低模量密封胶 Medium modulus sealant : Ex 3M 540 / 3M 550中模量密封胶 High modulus sealant: 3M 560 / 3M 590高模量密封胶 Viscosity (not mentioned on TDS) / Specific gravity 粘度（TDS上没有提及）/比重 Brookfield viscosity布氏粘度布氏粘度布氏粘度布氏粘度 The test gives the viscosity of the product at different speeds and the thixotropic index. The unit is mPa.s - we can also find Poiseuille (PI) or Poise (Po).单位是 Apparatus HBT Spindle 7 该测试能反应密封胶在不同转速和触变指数下的黏度 3M 5253M5603M590 Viscosity at 5 Rpm800 0001 800 000 6 400 000 mPa.s 5RPM转速下黏度 Specific gravity or Density 比重比重比重比重/密度密度密度密度 Quantity of sealant per volume (kg/l) 单位体积内密封胶的数量 Extrusion rate (not mentioned on TDS)挤出率挤出率挤出率挤出率（TDS没涉及没涉及没涉及没涉及） This test method measures the volume of sealant (quantity in grams) extruded in a certain period of time at a given pressure (bars) and in a given extrusion diameter (mm)该测试方法能测量密封 胶的容量（用g表示，在一定时间内，在一定的压力下给定尺寸的挤出口所能挤出的数量 Hybrid or PU sealants (excepted windshield sealant)混合密封胶，聚氨酯胶（除了挡风玻璃胶 除外） Air pressure gun气压枪 Flow rate 3 bars / nozzle 6 mm 流动数率 3 Cartridge at 23C before the test PU windshield sealant 挡风玻璃用聚氨酯密封胶 Special device特殊设备 Extrusion rate 4 bars / 4 mm挤出率4bars/ Cartridge at 23C before the test Lap Shear Test (not mentioned on TDS)动态剪切测试动态剪切测试动态剪切测试动态剪切测试 This test gives the mechanical resistance of an assembly kept under a lap shear strength. The unit is Mpa (N/mm) or PSI 该测试能得出密封胶的抗剪切强度。单位是Mpa（N/mm2）或者PSI Important : 1 Kg (Kilograms) = 10 N (Newton). Important : The speed can change the value of this test (10 mm/min)测试速度能改变测试结果 Tested area: 250 mm / Thickness 2 mm测试面积：250mm2/厚度：2mm Test carried out before and after an internal ageing test在内部老化测试前后开始做该测试 Description of our internal ageing test内部老化试验测试 7 days at 60C 7天60 3 days at -40C 3天-40 4 days at 40C / 100% HR 4天40， 100%相对湿度 1 day at 23C / 50% HR 1天23，50%相对湿度 Over lap shear test (only for windshield sealant) / shearing resistance 搭接剪切测试（针对挡风玻璃）/抗剪切力 Test to check windshield sealants performances according to FORD TEST SEA J 1529根据Ford test Sea J1529 测试标准测试挡风玻璃性能 Speed of the dynamometer: 25 mm/minutes Result expressed in daN Final value in MPa or PSI 测试速度（夹头或者测力计）：25mm/minutes 结果单位以daN（十牛顿）表示 最终结果以Mpa或PSI表示 Over lap shear test after 5 hours and 7 days (minimum value after 7 days : 500 PSI) 5小时和7天后测试搭接剪切强度 （7天后最小强度为500PSI） Specific values to reach Failure at break have to be adhesive Specimen样品 painted steel coat涂漆钢板涂漆钢板涂漆钢板涂漆钢板windshield 挡风玻璃胶挡风玻璃胶挡风玻璃胶挡风玻璃胶glass玻璃玻璃玻璃玻璃 sealant Application of windshield sealant / Beads behavior 挡风玻璃胶的应用/胶条特性 Samples of all manufactured windshield batches are extruded to check the behavior of the bead.所有挡风玻璃用密封胶样品需要挤出后检查胶条性能 Triangular beads are applied vertically 通常采用三角形胶条 Passed the test 通过测试 Failed the test 测试失败 To meet the performance requirements of the particular application, two factors are important: 为了满足特殊应用的性能要求，有两个重要因素： Adhesionthe adhesive must bond with each substrate (sticking to them) so they can be held together. If the product will not adhere to one of the surfaces, then the materials cannot be joined. 粘接力：胶粘剂必须能够粘住每个表面，这样这两表面就能粘在一起。如 果该胶不能粘接其中一个表面，那么这两种材料就不能粘在一起。 Cohesionthe adhesive must have enough internal strength so that it holds together and does not break within the film of adhesive when force is applied to pull the two surfaces apart. 内聚力-该胶粘剂必须得有足够的内聚力，不会在外部拉力作用下胶层中间 破裂 Material failure材料破坏 Adhesive failure胶水失效 Cohesive failure内聚失效 Superficial Cohesive failure胶水 表层内聚失效 Peel test剥离测试剥离测试剥离测试剥离测试 Manual test to evaluate easily the adhesion of the sealant on the substrates to bond before and after different ageing tests (heat, humidity, cold, UV) 手工测试简单地评估老化测试前后密封胶粘接基 材的粘接强度（湿，热， 冷，紫外） Index for the appearance after the manual peeling test C.F.Cohesive failure. Failure in the sealant joint. Good adhesion 内聚失效。失效在胶层。良好的粘接强度 S.C.F