橡胶-骨架油封制造质量的网络控制

介绍橡胶骨架油封制造质量的网络控制.橡胶骨架油封制造质量控制网络的重点是原材料质量、模具质量、混炼胶质量、金属骨架表面处理和胶粘剂涂覆质量、硫化质量、唇口切削质量、入库出厂前产品质量的控制.采取制造质量网络控制大幅度提高了橡胶-骨架油封产品质量.     

橡胶与金属骨架黏合失效的原因及解决方法

橡胶与金属骨架粘合失效的原因有很多,包括骨架仓存期的表面污染、抛丸法除锈的问题、胶粘剂问题、涂胶工艺问题、胶粘剂及金属骨架受到污染的问题、橡胶与胶粘剂之间的问题等。本文就浅谈橡胶与金属骨架粘合失效的原因分析及解决方法。     

保证胶粘剂RM-1粘合效果的措施

胶粘剂ＲＭ 1是一种无毒胶粘剂 ,其粘合强度高 ,价格低廉 ,应用范围也很广 ,但它有一个缺点 ,就是季节变化常导致其粘合效果不稳定而出现粘合脱胶问题。在此便讨论一下保证胶粘剂ＲＭ 1粘合效果的措施。1　金属骨架表面处理的影响金属骨架在与橡胶进行粘合前 ,必须先进行喷砂 (     

鞋底和鞋帮的粘接

鞋底和鞋帮间粘接破坏的原因已为人们所知—约有一半是鞋帮粘合表面处理不妥所至,继之为内聚力不足(胶粘剂的薄膜未能熔合在一起),鞋底粘合表面未处理好和胶粘剂未充分涂覆等原因。关于鞋底和鞋帮粘合“链型连结”这一论点能形象地阐明开胶的原因(见图1)。链的各环节都必须强而有力,只要存在一个薄弱环节就会导致粘接提前破坏。对回修鞋的检查,有助于发现粘接破坏的新趋势。最新检查表明,回修鞋中约21％为鞋     

提高某型硅橡胶隔振器粘接性能的研究

以苯基乙烯基硅橡胶为橡胶主体,不锈钢为骨架材料,通过调整不锈钢处理工艺,研究了提高硅橡胶与不锈钢粘接性能的工艺。结果表明,骨架材料涂覆胶粘剂后,单一无污染的干燥环境及等离子体处理不锈钢骨架材料表面,能有效提高硅橡胶与不锈钢的粘接性能。     

单轨止挡橡胶开裂故障分析及改进措施

针对单轨止挡橡胶开裂的故障问题,从止挡橡胶受力、刚度性能、轨道不平顺以及胶料性能、金属骨架表面处理、脱脂涂胶硫化等生产过程和加工工艺因素等方面进行原因分析,并提出添加补强剂、加大金属骨架表面机械喷砂力度、改进模具结构等改进措施。     

钛合金/氢化丁腈橡胶粘合性能的研究

研究了硫化体系(硫黄和过氧化物)、补强体系(炭黑N774、炭黑N550和沉淀法白炭黑)、骨架处理方法(机械喷砂法和人工砂纸打磨法)和涂覆胶粘剂种类分别对钛合金/氢化丁腈橡胶粘合性能的影响。结果表明,配方胶料1(硫黄硫化体系)焦烧时间长,操作安全性好,力学性能优,但压缩永久变形明显偏大;配方胶料2(过氧化物硫化体系)门尼粘度(ML)和焦烧时间均适中,力学性能与配方胶料1相当,压缩永久变形明显较小。配方胶料5(硫化体系基于配方胶料2,采用炭黑N774+炭黑N550+沉淀法白炭黑补强)力学性能提高,压缩永久变形基本保持不变。采用2种不同处理工艺(机械喷砂法和人工砂纸打磨法)所得剥离强度基本一致,即金属骨架表面处理工艺对钛合金/HNBR粘接强度的影响不明显。涂覆罗门哈斯MEGUM3276的剥离强度最大,涂覆开姆洛克CH252+KH550组合或英国西邦24C的次之,涂覆开姆洛克CH252的剥离强度最小。     

橡胶与金属或其他基材粘接时其表面处理方法

Chemosil胶粘剂是德国生产的一种橡胶与金属粘接用热硫化胶粘剂．文章介绍了用该胶粘剂粘接橡胶与金属等物体时其表面处理方法。     

谈谈氯丁胶粘剂的生产和使用

氯丁橡胶胶粘剂具有工艺简便、粘合力强、价格低廉等特点,在制鞋工业中特别是冷粘鞋中得到了广泛的应用。但目前在生产和使用氯丁胶粘剂方面存在一些问题,导致冷粘鞋开胶等质量问题。本文根据自己的经验谈谈氯丁胶粘剂的生产和使用。     

ZSM-5分子筛的表面涂覆及吸附甲苯研究

为解决颗粒状催化剂反应床层阻力与压降大等问题,采用溶胶-浆液法在三种刚性基材(堇青石蜂窝陶瓷、金属蜂窝基、单晶硅片)表面涂覆ZSM-5活性涂层,依次考察基材表面预处理方式、混合浆料的表观粘度等因素对表面涂覆的影响。结果表明,单晶硅片与金属蜂窝基的临界涂覆量均为8.3%,堇青石蜂窝陶瓷的临界涂覆量为42%;由ZSM-5涂覆后基材的疏水性略微下降,吸附甲苯性能得到提高。     

表面处理对硅橡胶胶粘剂胶接性能的影响

本文着重研究了不同表面处理条件下硅橡胶胶粘剂的粘接性能。有机硅烷偶联剂对提高硅橡胶胶粘剂的粘接性能有显著效果,其中以GPJ－43的处理效果为最佳。铝合金试样机械打磨后采用不同溶剂清洗对粘接性能也有影响,其中以三氯乙烯的效果为最好。磷酸阳极化是很有效的表现处理方法。对铝－铝粘接界面的分析发现,硅橡胶胶粘剂粘接接头的破坏一般为胶粘剂的内聚破坏或胶粘剂与偶联剂界面的粘附破坏。     

熟化硅橡胶与金属粘接的探讨

介绍了利用自制的Ｂ－４表面处理剂解决熟化硅橡胶与金属粘接中的问题。     

聚酯帘子线与橡胶粘合的研究进展

探讨了浸胶液在聚酯帘子线与橡胶之间的作用机理以及增粘作用。总结了聚酯一浴、二浴浸胶液、纺丝后加工浸胶处理、等离子体及共聚改性、纺丝技术的发展等对提高聚酯与橡胶粘接强度的影响。     

Surface modification of Kevlar® fiber by a combination of plasma treatment and coupling agent treatment for silicone rubber composite

To improve the adhesion between poly(p-phenylene terephthalamide), PPTA, fiber and silicone rubber, the surface modification of PPTA was investigated. Combining plasma treatment and coupling agent treatment with the silicone adhesive was found to be effective in improving adhesion. The combination process made the pull-out force of the PPTA yarn/silicone rubber composite 2.5 times higher, compared with the plasma treatment or the coupling agent treatment alone. The plasma treatment led to the elimination of carbonized layer from the PPTA yarn surface and the formation of oxygen functionalities including C-O and C=O groups. The elimination of the carbonaceous deposits from the PPTA surface and the interaction between the silicone adhesive and the oxygen functionalities created by the plasma treatment contribute to the improvement of adhesion with silicone rubber.     

铝合金与硅橡胶的粘接

进行铝合金表面处理工艺、胶粘剂粘接与硫化工艺对粘接强度影响的研究,结果表明采用化学氧化处理方法,可以使铝合金与硅橡胶的粘接强度稳定在３．０ＭＰａ以上。     

Enhancing adhesive joints between commercial rubber (SBS) and polyurethane by low-pressure plasma surface modification

The paper presents research on the two-stage process of low-pressure plasma surface modification of a commercial SBS rubber, improving its adhesion to both the polyurethane adhesive in an organic solvent (PU) and the aqueous polyurethane adhesive dispersion (ADPU). The plasma surface modification process was carried out in a flow reactor with parallel plate electrodes, in which plasma was generated by an RF glow discharge (13.56 MHz). In the first stage of the process, the Ar or O₂ plasma was used, and then, as the second stage of the modification process, the treatment was performed in H₂O plasma. The adhesive properties of the plasma-modified SBS rubber surface were determined using the 180^o-peel strength test (PS). These results were correlated with surface properties investigated using contact angle (CA) measurements, FTIR-ATR spectroscopy, XPS spectroscopy and scanning electron microscopy (SEM). The observed improvement in wettability of the plasma modified surface was attributed to the formation of hydroxyl groups, which was confirmed by spectroscopic methods (FTiR-ATR and XPS). The results of the 180^o-peel strength test showed, in turn, a clear relationship between the capacity of adhesive bonding and the amount of oxygen groups (mainly the hydroxyl groups) as well as the surface roughness, determined by SEM microscopy. It was also found that the effects of the plasma surface modification of the SBS rubber were stable for at least 72 h. The results of this work prove that cleaning and etching of the commercial SBS rubber surface in the first stage of its plasma treatment, followed by chemical modification in the second stage, lead to very strong adhesive joints.     

室温硫化硅橡胶胶粘剂粘接增强改性研究进展

室温硫化(RTV)硅橡胶胶粘剂具有很多优异的性能,因而在电子电器、汽车、机械、建筑和医疗等行业中得到广泛应用。但由于其对各种基材的粘接性能较差,因此对其进行粘接改性的研究很多,主要包括交联剂、聚硅氧烷物理化学增强和粘接面的表面处理等方面的改性研究。从交联剂的选择、树脂的增强改性和粘接面的表面处理方面综述了RTV硅橡胶胶粘剂的增强改性机理和国内外的研究进展,并提出了未来的研究方向。     

橡胶减振制品与骨架表面处理黏结的探讨

试验研究了橡胶减振制品骨架材料(金属与非金属)的表面处理工艺中脱脂、喷砂、磷化、水洗等环节及胶黏剂厚度等因素对橡胶与骨架材料的黏合效果的影响,得出了最优的黏合工艺,对实际生产具有指导意义。     

UV treatment of synthetic styrene-butadiene-styrene rubber

The effectiveness of the treatment with ultraviolet light (UV) on several polymeric surfaces has previously been established. In this study, a low pressure mercury vapour lamp was used as a source of UV radiation for the surface treatment of a difficult-to-bond block styrenebutadiene-styrene rubber (S6), the treatment time ranging from 10 s to 30 min. The UV-treated S6 rubber surfaces were characterized by contact angle measurements (ethylene glycol, 25°C), ATR-IR spectroscopy, XPS, Scanning Electron Microscopy (SEM), and Atomic Force Microscopy (AFM). T-peel tests on UV-treated S6 rubber/polyurethane (PU) adhesive/ leather joints (before and after ageing) were carried out to quantify adhesion strengths. The UV treatment of S6 rubber produced improved wettability, the formation of C—O, C=O and COO^- moieties, and ablation (removal of a thin rubber layer from the surface). The extent of these modifications increased with increasing treatment time. The extended UV treatment produced greater surface modifications, as well as the incorporation of nitrogen moieties at the surface. Furthermore, noticeable ablation of S6 rubber surface occurred. Peel strength values increased with increased treatment time of UV treatment of S6 rubber. Also, with increasing treatment time, the adhesive joints showed different loci of failure: adhesional failure for the as-received and 2 min-UV treated S6 rubber/polyurethane adhesive/leather joints changed to mixed failure (cohesive in the treated S6 rubber + adhesional failure) for the 30 min-UV treated S6 rubber/polyurethane adhesive/leather joint.     

Ultrasonic cleaning of SBR rubber to improve the performance of subsequent plasma torch treatment

Paraffin wax and other moieties in sulfur vulcanized styrene-butadiene rubber formulations may migrate to the surface, reducing the adhesive strength in joints produced with polyurethane adhesive. In this study, with the aim to remove paraffin wax and other anti-adhesion moieties on the rubber surface to improve adhesion, prior to plasma torch treatment, a methyl ethyl ketone (MEK) cleaning in an ultrasonic bath has been carried out. The surface modifications produced on the rubber surface have been analyzed by contact angle measurements, ATR-IR spectroscopy, XPS and SEM. The adhesion properties have been evaluated by T-peel strength of treated rubber/polyurethane adhesive joints. Ultrasonic cleaning in MEK resulted in partial removal of paraffin wax on the rubber surface and, thus, lower contact angle values, decreased relative intensity of the infrared bands due to hydrocarbon moieties and lower percentage of carbon assessed from XPS spectroscopy were obtained. The ultrasonic cleaning in MEK of the rubber increased the effectiveness of the atmospheric pressure plasma torch treatment, and surface oxidation was produced. However, the oxidation degree decreased with time after plasma torch treatment, likely due to ageing of the surface treated rubber.