新型快速固化胶粘剂研究

本文主要介绍了新型复合薄膜用快速固化聚氨酯胶粘剂的制备和性能。该胶粘剂粘度低。初粘力强，剥离强度高，适用于高速复合薄膜生产线。     

蒸煮食品包装复合袋用胶粘剂

复合薄膜包装材料是将不同特性的薄膜以专用胶粘剂复合在一起,以克服单一薄膜固有的缺陷。该材料自上世纪50年代问世以来,     

聚氨酯胶粘剂在软包装复合薄膜中的应用研究

文中重点阐述了层压复合中主要使用的溶剂型、低溶剂型、水基型、和100％反应型的聚氨酯胶粘剂的应用状况，并对国内复合薄膜用胶粘剂的研究开发、国产化替代进口提出建议。     

中国TPU市场分析(下)

我国的TPU产品应用领域众多,其中包括鞋材、融法氨纶、合成革、胶粘剂、薄膜、薄片、管材、棒材、滚轮、电缆及汽车用品等众多领域,其下游细分市场呈现不同态势。上期已就TPU在鞋材、熔纺氨纶、合成革、胶粘剂行业的应用进行了分析,本期就薄膜等行业进行分析,并对今后TPU市场的发展趋势作简单分析。     

不使用胶粘剂的印刷线路用薄膜

日本东丽公司研制成功,并将开始出售不使用胶粘剂,可用于精密印刷线路加工的薄膜。这种薄膜是该公司以从美国杜邦公司购进的“Kapton”耐热聚酰亚胺薄膜作底基的。在薄膜的表面予先经钯金属的特殊处理,不使用胶粘剂,把铜箔或镍箔贴附于薄膜上,可用于印刷线路加工。在世界上该公司是研制出这种新产品的第一家。制作精密印刷线路,目前有两种方式,一种是在合成树脂制的底板上贴附上铜箔;另一种是在耐热性薄膜上贴附上铜箔。最近使用薄膜作底基的柔性印刷线路,趋向发展更快。     

水性复膜胶发展的春天来临

复合薄膜软包装是通过胶粘剂把不同基材（塑料膜、铝箔、纸等）粘接在一起、做成统一整体的复合材料,因为它能够提供商品包装要求的多样化、方便化、高档化、美观化而得到迅猛发展。通常将这种胶粘剂称为复膜胶。     

对843复合薄膜的剖析

843复合薄膜是常规武器用的一种包装材料。剖析的目的,主要想了解复合薄膜每一层材料的成分和各层之间胶粘剂的成分,以便为我所用。     

胶粘剂在粘接接头内热分解动力学的计算

为了研究粘接接头内胶粘剂的耐热性能,采用X射线能谱分析确定了不同条件下粘接接头内胶粘剂的元素组成及其变化行为,利用X射线能谱计算了胶粘剂的热失重率,进而计算出聚酰亚胺薄膜粘接接头内胶粘剂的热分解动力学,并与空气环境下胶粘剂热分解活化能进行了比较.计算结果表明,粘接接头内胶粘剂的热分解速率低于空气环境下胶粘剂热分解速率,这种分析测试方法为原位表征粘接接头内胶粘剂耐热性能提供了一种新的分析方法.     

聚乙烯薄膜粘接用热熔型压敏胶的研制

本文系统研究了用于PE薄膜粘接的热熔型EVA、丁基橡胶压敏胶粘剂中主体聚合物、增粘树脂、稳定剂及填充剂等组分的选择及不同用量对粘接性能的影响 ,通过实验研究了各组分的作用原理及胶粘剂的生产工艺条件。这二种压敏胶粘剂具有较好的耐老化及低温性能 ,也可用于其它低表面能材料的粘接。     

高透明复合薄膜用聚氨酯胶粘剂的制备

以混合低分子二元酸、多元醇为原料,采用一步聚合法制备了高透明复合薄膜用双组分聚氨酯胶粘剂的主剂,研究了对苯二甲酸(PTA)、低分子多元醇A、低分子多元醇B、醇酸比和催化剂对胶粘剂性能的影响.结果表明:当醇酸比为1.15, PTA的用量为所用低分子二元酸物质的量的37.5%,低分子多元醇A的用量为所用低分子多元醇物质的量的1.5%,低分子多元醇B的用量为所用低分子多元醇物质的量的15%时,可以制得满足复合薄膜工艺要求的高透明聚氨酯胶粘剂主剂.     

Bioinspired Composite Microfibers for Skin Adhesion and Signal Amplification of Wearable Sensors

A facile approach is proposed for superior conformation and adhesion of wearable sensors to dry and wet skin. Bioinspired skin‐adhesive films are composed of elastomeric microfibers decorated with conformal and mushroom‐shaped vinylsiloxane tips. Strong skin adhesion is achieved by crosslinking the viscous vinylsiloxane tips directly on the skin surface. Furthermore, composite microfibrillar adhesive films possess a high adhesion strength of 18 kPa due to the excellent shape adaptation of the vinylsiloxane tips to the multiscale roughness of the skin. As a utility of the skin‐adhesive films in wearable‐device applications, they are integrated with wearable strain sensors for respiratory and heart‐rate monitoring. The signal‐to‐noise ratio of the strain sensor is significantly improved to 59.7 because of the considerable signal amplification of microfibrillar skin‐adhesive films.     

包装复合膜用松香改性水性聚氨酯胶粘剂

利用松香改性水性聚氨酯胶粘剂,研究了二羟甲基丙酸(DMPA)用量、NCO/OH值、松香用量对乳液性能的影响,比较了改性前后该胶粘荆对多种塑料薄膜的粘接性能.实验结果表明改性后的胶粘剂对多种塑料薄膜具有较强的粘接能力.     

Resistivity and adhesive strength of thin film metallizations on single crystal quartz

Resistivity and adhesive strength were measured for the thin films 450 A Cr-1800 A Au, 450 A Cr-1000 A Mo-1800 A Au, 450 A Cr-1000 A Ni-1800 A Au, 450 A Mo-1800 A Au, 1800 A Au, and 2000 A Al on z-and AT-oriented single crystal quartz substrates in the as-deposited condition as well as after thermal annealing at 380 degrees C and 450 degrees C for 30 min in air or vacuum. The Cr-Au films exhibited significant resistivity increases after thermal annealing which were caused by the interdiffusion of Cr and Au. Barrier layers of Mo or Ni limited such increases after heat treatment. The Mo-Au, Au, and Al films exhibited resistivity decreases following thermal annealing. The mean adhesive strengths of the Cr-Au, Cr-Mo-Au, and Cr-Ni-Au films were excellent in the as-deposited and annealed conditions, ranging from 41 MPa to 70 MPa. The Mo-Au and Au films maintained relatively poor adhesion under all circumstances. Heat treatment improved the poor adhesive strength of the as-deposited Al films to values exceeding 63 MPa. Resistivity and adhesive strengths did not differ significantly between the z- and AT-oriented substrates.     

A simple way to achieve tunable adhesion in superhydrophobic nanostructured Co3O4 films

Tunable adhesive forces on the superhydrophobic nanostructured Co₃O₄ films have been achieved by simply rubbing the as-prepared films. Rubbing makes the change of morphologies of the films and leads to the tuning of adhesion. This morphology-dependent adhesive property is attributed to the difference in kinetic barriers resulting from the contact-state change. This simple and practical method can provide an important strategy for the adhesion adjustment on superhydrophobic surfaces.     

Oxygen-ion-assisted deposition of thin gold films

Thin gold films have been deposited on glass and silicon substrates using ion-assisted deposition techniques. The adhesion of the films to the substrates is assessed by a scratch test. Deposition assisted by 100 eV-1 keV oxygen ions yields highly adhesive films that can only be removed by damaging the substrate. Argon and hydrogen ions produce films with relatively poor adhesion. The results show that the reflectance of oxygen-assisted films is reduced by trapping of the oxygen in the gold but no bulk chemical or structural changes are detected. It is proposed that a thin stable layer of gold oxide is formed during film growth and diffuses into the substrate, providing a strong bond for subsequent film deposition. Highly adhesive films with bulk optical properties are deposited on glass and silicon using oxygen-ion assistance only to the point of continuous film formation.     

Roles of discontinuities in bio-inspired adhesive pads.

Morphological intricacies of the biological attachment pads generate considerable interest owing to their remarkable ability to control adhesion to various surfaces. Motivated by the adhesive microstructures of insects, we examine the behaviour of adhesion and crack propagation in patterned adhesive films. These films are made of silicone elastomers that were patterned with lateral, longitudinal or crosswise incisions from which a thin silanized glass plate was removed in a displacement-controlled peel experiment. The behaviours of crack propagation on these patterned adhesive films are controlled by simple incision patterns, their depths and spacing. With the crosswise incisions, significant enhancement (x10-20) of fracture energy has been achieved. These findings point towards an important mechanism by which of biological organisms might enhance adhesion, and provide a simple design principle for manipulating the interfacial fracture in a variety of artificial attachment devices.     

H13钢离子渗氮(PN)与类金刚石(DLC)复合处理的摩擦磨损性能研究

采用阳极层流离子源与非平衡磁控溅射结合的沉积方法在H13钢基体表面沉积出类金刚石膜(DLC),并对H13钢经不同表面预处理对后沉积的DLC膜的摩擦学性能进行了对比研究.结果表明:DLC膜结构致密,且DLC膜与梯度过渡层及基体三者之间结合牢固;H13钢经离子氮化后,梯度过渡层与氮化层间结合紧密,提高了膜与基体的承载能力;在保持相同摩擦速率的条件下,摩擦系数随着载荷的增加先增大后减小;H13钢离子渗氮处理后沉积的DLC膜其摩擦系数远小于未采用离子渗氮处理沉积的DLC薄膜.     

The adhesion of thin plasma-polymerized organic films to metal substrates

The direct pull method was used to study the adhesion of thin (<1 μm) plasma-polymerized films on metal substrates. Application of this method provides information on the cohesive, as well as the adhesive, properties of these films. After breakage of the films by the pull method, the interface was analyzed by scanning electron microscopy to determine the nature of the breakage at the interface. Electron spectroscopy for chemical analysis was used to determine whether any chemically adsorbed layers of organic films remained after the films had been pulled from the metal substrate. The adhesive or cohesive strengths of plasma-polymerized tetrafluoroethylene and chlorotrifluoroethylene films on 304 stainless steel, aluminum and silver were measured by the pull method. Adhesive strength was found to be higher than cohesive strength for plasma-polymerized tetrafluoroethylene films on the various substrates. The result for plasma-polymerized chlorotrifluoroethylene films was not as expected, indicating that considerable care is required in the interpretation of tensile tests of laminates such as those conducted in this study.     

The influence of drug-excipient and drug-polymer interactions on butt adhesive strength of ranitidine hydrochloride film-coated tablets

The influence of fillers and polymeric films on adhesive strength of hydroxypropyl methylcellulose (HPMC) and Eudragit E100® films coated on ranitidine HCl tablets containing either spray-dried rice starch (SDRS) or lactose monohydrate as fillers after storage at 45°C/75% RH for four weeks was investigated by the use of butt adhesion technique. The adhesive strength of film-coated tablets of fillers without drug was found to slightly decrease after storage. In contrast, the adhesive strength of drug-containing film-coated tablets significantly reduced, the degree of which was higher for Eudragit E100® than HPMC. Physicochemical characterization by employing differential scanning calorimetry (DSC) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) revealed that the drug was obviously incompatible with lactose and possibly mild interaction with Eudragit E100® was suggested. The results indicated that the adhesive strength of film-coated tablets would be affected not only by the drug-excipient interaction, but also by the drug-polymeric film interaction.     

Effect of angle of incidence during deposition on Ti-Pd-Au conductor film adhesion

The influence of a number of the preparation conditions on the adhesive properties of the Ti-Pd-Au metallization on Ta₂N film resistors was investigated. Test samples consisted of a filament-evaporated conductor film on an unpatterned Ta₂N film on glass, sapphire and Al₂O₃ ceramic substrates. The adhesive properties of the Ti-Pd-Au films were examined as a function of the angle of incidence at which the Ti and Pd atoms were deposited. In addition the adhesive properties were examined after heat treatment in air and after electroplating gold. Transmission electron microscopy and density measurements established that at higher angles of incidence (&#62;60°) Ti and Pd films became increasingly porous and that adhesion at the Ti-Pd interface degraded rapidly upon exposure to air. Both evaporated and plated Au layers appear to offer little protection for films evaporated under these conditions. Good adhesion was found to be independent of the substrate material and of the method used for gold deposition when the Ti-Pd films were evaporated at angles of incidence of 48° or less.