输送带热硫化胶接技术应用情况总结

通过多年来对输送皮带热硫化胶接技术的应用实践,对热胶接工艺进行分析总结,介绍了胶带接头尺寸的确定、硫化胶接的程序、接头热硫化工艺程序及硫化三要素,提出皮带热硫化胶接中的有关质量要求、需注意的问题及建议.     

橡胶与金属热硫化粘结剥离方向性研究

对以天然橡胶为基料，硫黄硫化的三种硫化体系的胶料进行金属样板及圆柱型金属同橡胶的粘接实验。实验表明配合胶料的硫化体系不仅影响橡胶同金属的粘结强度而且是产生其粘结剥离方向性差异的主要原因。     

橡胶—金属硫化粘接用单涂层粘合剂

综述了橡胶－金属硫化粘接用单涂层粘合剂的组成、制备、制备和应用。介绍了粘合剂的成膜剂、增粘剂、粘接促进剂、偶联剂、固化剂、填料和溶剂等组分的主要品种和作用。     

飞机修补胶的研制

飞机修补胶是一种可在较低温度固化具有耐高温性能的环氧酸酐型胶粘剂。该胶在100℃固化3h，常温剪切强度为30．6MPa、175℃剪切强度为12．8MPa、板剥离强度为4．1kN／m、蜂窝剥离强度为3．3kN／m；具有良好的耐介质浸泡、耐热老化、耐湿热老化等综合性能。该胶对表面采用不同方法处理的多种金属和非金属材料均有较好的粘接强度。在-60℃～175℃范围内，用于板—板和板—芯各种胶接部件的修补粘合。     

输送带热硫化胶

由湖北省宜昌市葛洲坝粘合剂开发公司推出的输送带热硫化胶，该产品是由硫化胶浆和硫化胶片组成，具有阻燃性、粘接强度高，流动性好、易涂刷、干燥速度快等特点。该胶广泛用于各种橡胶输送带，钢芯输送带、整芯输送带、尼龙、帆布、聚酯输送带接头硫化胶接，特别适应上述输送带在高温环境下接头硫化胶接。     

模压温度对天然橡胶与金属的胶接强度的影响

用半有效硫黄硫化天然橡胶硫化胶为研究,研究分析了压温度对胶接接头剥离强度的影响。发现模压温度较高时,剥离力也较大。     

金属有机涂层与丙烯酸酯橡胶的直接硫化粘合

文中介绍了丙烯酸酯橡胶(ACM)与铁、镍或不锈钢(SUS304)等金属材料在硫化时直接粘合的新技术，通过6—烯丙基胺—1．3．5—三嗪—2．4—二硫醇单钠(DAN)的电化学聚合在金属表面形成聚合物薄膜，然后直接与丙烯酸酯橡胶进行硫化粘合。为了与历来的金属电镀相区别，上述对金属表面的改性也称之谓聚合物电镀，聚合物薄膜的厚度会明显影响聚合物电镀金属与丙烯酸酯橡胶粘接的剥离强度。即薄膜厚度在25nm以内，剥离强度随厚度的变化急剧增大，且在超出这一厚度值时仍能保持足够高的剥离强度，呈现出完全是橡胶表面层的内聚破坏。粘接件的剥离强度虽会因硫化剂用量的增加而残小，但在正常的配合剂用量下仍呈现出橡胶表面层内聚破坏。橡胶的硫化温度和硫化时间对粘接件的剥离强度的影响不大。用该方法制得的粘接件具有优异的耐老化和耐油性能。     

环境友好型底胶的研究进展

在航空工业中的胶接领域,为了降低底胶中含有的大量挥发性有机溶剂（VOC）和铬酸盐,促进了环保型底胶的研发。对于水基底胶、无机底胶以及不合铬酸盐的底胶的胶接耐久性试验表明,一些新型的环保型底胶的性能与传统的溶剂型底胶处于同一水平甚至更好。新型底胶也同样能够提高复合材料的胶接强度和耐久性能,但应该寻找更环保、更简便的方法来获得耐久性的胶接。磷酸阳极化作为铝合金胶接中最好的表面处理方法本身具有很好的耐久性,使用耐久性较好胶粘剂获得耐久胶接是较好的方案之一。     

硫化时间及硫化体系对粘土胶热氧老化性能的影响

用热空气老化试验和热分析法讨论了硫化时间和硫化体系对粘土胶热氧老化性能的影响。结果表明,粘土胶由于热氧性能敏感,在硫化曲线允许的范围内,硫化时间以２０ｍｉｎ为宜。采用有效硫化体系和半有效硫化体系硫化粘土胶可以使其具有较好的热氧老化性能。     

天然橡胶与金属双涂层胶接体系的研究

采用机械共混和胶料成膜工艺制备了一种酚醛-橡胶型膜状胶黏剂,探讨了主要组份对胶黏剂胶接性能的影响。该膜状胶黏剂与制备的底胶构成的双涂层胶接体系满足天然橡胶与金属的热硫化粘接,扯离强度达到4.0MPa以上,180°剥离强度达到3.0kN/m以上,且试件大都为橡胶内聚力破坏。热失重(TGA)测定膜状胶黏剂固化产物的明显热失重温度达到了350℃以上,其热稳定好。该胶接体系不仅适用于天然橡胶与金属的热硫化粘接,还适用于天然橡胶与树脂基复合材料的热硫化胶接,目前该胶接体系已成功应用于天然橡胶与碳/聚酰亚胺复合材料胶接构件的制造中。     

橡胶金属粘合剂耐热性能研究

本文研究了不同种类的粘合剂在100℃至150℃温度下,预固化5分钟至15分钟对于天然橡胶金属复合件的粘合强度的影响。结果表明：预涂在金属表面的粘合剂经过适当的预固化处理后,对于成品取得高强度粘接性能是有帮助的。最佳的预固化温度不宜高于120摄氏度,时间不超过10分钟。     

MRP管道镀锌钢带与热熔胶之间粘接性能研究

钢带增强聚乙烯螺旋波纹管(MRP)中钢带与热熔胶之间的粘接对管道质量有很大的影响。本文主要从原材料选择、制样工艺条件和钢带表面处理3个方面对热熔胶与镀锌钢带之间的粘接性能进行了研究。不同型号的热熔胶和镀锌钢带对粘接性能有很大的影响;压力升高到5 MPa时热熔胶与钢带之间的粘接性有一定的提高,一定范围内升高温度对材料的粘接性有一定的提高;对镀锌钢带表面进行Zn系磷化能很好地提高界面粘接效果。     

紫外光固化胶粘剂的粘接强度研究

以二官能团PUA(聚氨酯丙烯酸酯)为基体树脂、四氢呋喃丙烯酸酯为稀释单体、γ-缩水甘油醚基丙基三甲氧基硅烷(KH-560)为偶联剂、HCPK(1-羟基环己基苯基甲酮)为光引发剂和nano-SiO2(纳米二氧化硅)为填料,成功制备出一种UV(紫外光)固化胶。将UV固化胶用于PC(聚碳酸酯)塑料片材的胶接,并以该胶接件的T型剥离强度作为考核指标,采用单因素试验法优选出制备UV固化胶的较佳配方。结果表明:当w(二官能团PUA)=64%、w(HCPK)=3.0%、w(KH-560)=1.00%、w(四氢呋喃丙烯酸酯)=30%和w(nano-SiO2)=2.0%时,UV固化胶的剥离强度达到甚至超过市售同类产品(loctite3106)。     

Epoxidized natural rubber as a dry adhesive for metal to metal bonding

Epoxidized natural rubber with an epoxide content of 50 mol% was found to be a novel adhesive for bonding aluminium to aluminium. The conditions for obtaining maximum joint strength were optimized by varying the mastication time and moulding conditions such as time, temperature, and pressure.     

高硬度橡胶-金属黏接体的黏结性能

采用热硫化黏接工艺制备了天然橡胶(NR)/溶聚丁苯橡胶(SSBR)-圆形金属黏接体,考察了硫化体系、增强体系对NR/SSBR-圆形金属黏接体界面黏结性能的影响。结果表明,高填充量炭黑增强NR/SSBR与圆形金属界面的最低黏接强度明显低于低填充量炭黑增强NR/SSBR;增加促进剂NOBS用量降低了橡胶与圆形金属界面的最低黏接强度;用3份预处理短纤维代替15~20份炭黑,不仅保持了被黏橡胶的邵尔A硬度及拉伸强度,而且明显改善了与圆形金属的黏结稳定性。     

The effect of different bonding protocols on the repair microshear bond strength of water-stored CAD/CAM resin composite

This study evaluated the repair microshear bond strength (μSBS) of water stored CAD/CAM resin composite under eight different surface treatments using a silane-containing universal adhesive in etch-and-rinse and self-etching modes. In total, 48 CAD/CAM resin composite slices were prepared from Lava Ultimate CAD/CAM blocks and stored in water for 6 months. The slices were assigned into 8 main groups, according to surface treatments (no treatment, no-treatment/silane, surface grinding, surface grinding/silane, sandblasting, sandblasting/silane, silica coating and silica coating/silane). Each main group was divided according to the universal adhesive application mode (either the etch-and-rinse mode or the self-etch mode). Each slice received 6 resin composite micro-cylinders (0.8 × 1 mm). Micro-shear bond strength was run at 0.5 mm/min crosshead speed until failure. Treated surfaces were examined using SEM. Bond strength data were statistically analyzed using Two-Way ANOVA/Tukey HSD post hoc test. Only ‘surface treatment’ significantly affected the repair μSBS (p ? 0.001). Parameters ‘Adhesive application mode’ and ‘surface treatment × adhesive mode’ showed no significant effect on μSBS (p = 0.458 and p = 0.286 respectively). Regardless of the adhesive application mode, silica coating showed the highest μSBS (21.6 ± 6.8 MPa), while sandblasting/silane showed the lowest μSBS (13.0 ± 6.1 MPa). Regardless of adhesive application mode, the use of silica coating to treat the water-stored CAD/CAM resin composite surfaces is crucial to improve the repair bond strength.     

金属与橡胶粘接用双组份胶液的研制

研制了一种酚醛-丁腈橡胶型双组份胶液,主要应用于橡胶与金属之间、橡胶与橡胶之间及橡胶与其他非金属材料之间的胶接。该胶既可以冷粘、又可以热硫化粘接;且粘接强度较高、耐介质、耐老化等综合性能优良。     

粘接型CR244粉末橡胶在溶剂型氯丁粘合剂中的应用研究

研究了包覆凝聚法制备CR244粉末橡胶中,高分子树脂包覆剂组分、用量及2402树脂对所制备胶粘剂粘接性能的影响,同时对CR244粉末胶及片胶的溶解时间进行了比较。结果表明,M1、M2可提高胶粘剂的粘接强度;M3则会对粘接性能起到破坏作用。用包覆凝聚法制备的CR244粉末橡胶制备胶粘剂时仍可加入2402树脂,但用量应相对降低。用粉末胶代替传统片胶可大大缩短胶料溶解的时间,从而达到节能增效的目的。     

The effect of MDP-based primer on shear bond strength of various cements to two different ceramic materials

The aim of this study was to determine the effect of 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-based primer on the shear bond strengths of thermally aged self-adhesive and conventional adhesive resin cements and zinc phosphate cement to zirconia and lithium disilicate substructures. Sixty zirconia (Z) and 60 lithium disilicate (L) disk specimens were cut from ceramic blocks. Each group was divided into six subgroups (n = 10). Half of the specimens of each ceramic group were treated with primer (P) and the other half was remained untreated. Three types of cement were applied: zinc phosphate cement [(ZPC) (Hoffmann Harmonic Shades)]; self-adhesive resin cement [(SAC) (RelyX U200)]; conventional adhesive resin cement [(CAC) (C&B)]. The specimens were subjected to thermal aging procedure for 1 week under 37 °C water bath. Shear bond strength (SBS) was determined using a universal testing machine at a crosshead speed of 1 mm/min. Data were analyzed with three-way (ANOVA). Pairwise comparisons and interactions between groups were analyzed by using Tukey’s simultaneous confidence intervals. There was no significant difference between the SBS values of SAC-Z (11,47 ± 0,47) and SAC-ZP (11,39 ± 0,42) (p > 0.05). However, the SBS values of SAC-L (12.34 ± 0,55) and SAC-LP (12,50 ± 0,49) were significantly higher than those of SAC-Z and SAC-ZP (p < 0.00). The use of primer significantly increased the SBS value of CAC-ZP (8,05 ± 0,55) when compared to the SBS value of CAC-Z (3,53 ± 0,41) (p < 0.00). Resin cement that contains methacrylate monomers with phosphoric ester functional groups exhibited reliable bond to zirconia. However, the use of an MDP-based primer may not further improve its bond strength.