EMMA改性MCPP薄膜性能研究

采用三层共挤流延法成膜工艺,在镀铝层树脂中物理共混人乙烯一甲基丙烯酸甲醋(EMMA)进行改性,制备了镀铝级流延聚丙烯(MCPP)薄膜。研究了EMMA树脂的共混含量对MCPP薄膜的挺度、雾度以及真空镀铝后对铝层附着牢度的影响。结果表明,在镀铝层原料树脂中共混人20%的EMMA,所制备的改性MCPP薄膜机身方向(MD)的1%正割模量为568 MPa,雾度值为7. 40%,薄膜镀铝后的铝层附着牢度达到1. 38 N/15mm。改性后的薄膜能满足镀铝工艺要求,且大大提高了薄膜对铝层的附着牢度。     

真空镀铝CPP薄膜的生产与应用

本文主要介绍了真空镀铝用ＣＰＰ五层共挤流延聚丙烯薄膜的生产工艺及其在包装上的应用，并对镀铝前后其主要性能进行了比较。     

真空镀铝薄膜清漆用水溶性丙烯酸树脂的研制

采用溶液自由基聚合方法合成了水溶性丙烯酸树脂,将其配成清漆涂覆在真空镀铝薄膜表面,研究了丙烯酸酯单体种类以及混合单体反应浓度对清漆涂膜的耐盐雾性、附着力以及光泽度的影响,通过红外光谱对较佳条件下合成的丙烯酸树脂进行了表征。结果表明,随着丙烯酸酯单体酯醇碳链长度的增加以及混合单体中丙烯酸用量的减少,清漆涂膜对真空镀铝薄膜的防护作用逐渐增强。以丙烯酸十八酯(SA)和丙烯酸(AA)复配,当m(AA)∶m(SA)为1∶3,混合单体体积浓度为20%时,所制备的水溶性丙烯酸树脂清漆对真空镀铝薄膜的金属光泽影响较小,涂膜的耐盐雾性为1级,附着力为0.82N/mm2,能够满足真空镀铝薄膜的防护要求。     

高效环保高速9层共挤高阻隔膜生产线

本文对高阻隔薄膜的性能、用途和结构进行说明，分析高阻隔薄膜的工艺控制要点以及介绍了最新研究成果九层共挤高阻隔流延薄膜设备。     

汽车镀铝后视镜片腐蚀案例分析

汽车镀铝后视镜片易发生氧化腐蚀，油漆保护层是镀铝层抗氧化腐蚀的关键。本文通过对发生氧化腐蚀的镀铝后视镜片进行观察和分析，将生产到使用全过程中可能导致腐蚀的原因逐一进行分析并排除，然后结合企业内部质量要求和相关国家标准要求，针对性地进行试验验证，明确了镀铝层发生腐蚀的主要原因在于漆膜保护层的耐水性存在问题，最后提出了相应的措施和建议，为企业发现问题、解决问题提供依据。     

镀铝玻璃镜镜背涂料研究的进展

镀铝玻璃镜具有比镀银玻璃镜更环保的生产工艺，但由于镀铝层的耐碱性不及镀银玻璃镜，所以在开发水性镀铝玻璃镜镜背涂料时，要特别注意提高其耐碱性。本文梳理了历年镀铝玻璃镜镜背涂料的研究进展，讨论了溶剂型镀铝玻璃镜镜背涂料发展过程中树脂和耐腐蚀剂选型的变化，探讨了水性镀铝玻璃镜镜背涂料中树脂和耐腐蚀剂选择的原理，认为在水性树脂中增加磺酸盐基团的含量是提高水性镀铝玻璃镜镜背涂料耐碱性的关键，水性单涂层是水性镀铝玻璃镜镜背涂料的发展方向。     

高阻隔型双向拉伸共挤薄膜的制备及性能研究

研究了薄膜阻隔性能的机理,并对薄膜配方进行设计,通过多层共挤双向拉伸工艺,实现高阻隔薄膜的量产.同时,研究了薄膜配方及成型参数对薄膜厚度均匀性、雾度等性能的影响.     

电沉积Al/Fe/Cu多层薄膜的固态扩散研究

采用AlCl3-NaCl熔融盐镀铝、FeSO4溶液镀铁、CuSO4溶液镀铜得到了结构完整、界面清晰的Al／Fe/Cu多层薄膜。研究了电流密度、时间、温度对镀铝层性能及电流效率的影响。采用X-射线衍射仪对该多层薄膜热处理前后进行了表征，并用金相显微镜对其结构与形貌进行了分析。结果表明，该多层薄膜致密均匀且各层之间结合力良好；通过热处理后得到了一面心立方结构的新相，该新相基本结构与Cu大致相同，且多层薄膜中铁铜质量比越低，越有利于该新相的生成。     

七层共挤高阻隔薄膜吹塑机组

介绍了七层共挤高阻隔薄膜吹塑机组。     

车灯塑料件真空镀铝缺陷分析与对策

讲述了车灯镀铝和镀层性能测试的基本要求,对镀铝的缺陷类型进行分析,重点分析了注塑毛坯件缺陷、镀铝工序缺陷、包装与运输缺陷、试验件报废等4种情况,分享了部分对策。指出还应从灯具设计源头进行优化,尽量采用遮挡等方式掩盖镀铝缺陷,以减少镀铝件报废。     

纳米片状铝浆料的研制及其对镜面银油墨的性能影响

介绍了物理气相沉积法(PVD)制备纳米片状铝浆料的工艺流程。重点研究镀铝层厚度、PET(聚酯)薄膜与镀铝层之间的剥离层用树脂的黏度、纳米片状铝浆料中的防沉剂和溶剂对镜面银油墨镜面效果的影响。     

渗铝Q235钢的渗层组织和抗高温氧化性能

分析了Q2 3 5钢热浸渗铝和铝硅合金层的显微组织 ,并对其抗高温氧化性能进行了研究。热浸渗层由镀层 (表层 )和化合物层 (内层 )两层组成 ,金相和X射线能谱分析 (EDS)结果表明纯铝渗层的化合物层呈厚齿状 ,由η相 (Fe2 Al5)组成 ;铝硅合金渗层的化合物层呈薄带状 ,由Si合金化的η相即Fe2 (Al Si) 5组成。热浸渗层经扩散退火后 ,表面镀层消失 ,渗层由表及里依次出现 η相、ζ相、β2 相、β1相和固溶体α相等过渡组织。 80 0℃高温氧化试验结果表明 ,渗纯铝Q2 3 5钢的抗高温氧化性能优于 1Cr1 8Ni9Ti不锈钢 ,硅的加入可以改善热浸工艺性能 ,但降低了渗层的抗高温氧化性能。     

Nanocrystallization of aluminized surface of carbon steel for enhanced resistances to corrosion and corrosive wear

Aluminizing is often used to improve steel's resistances to corrosion, oxidation and wear. This article reports our recent attempts to further improve aluminized carbon steel through surface nanocrystallization for higher resistances to corrosion and corrosive wear. The surface nanocrystallization was achieved using a process combining sandblasting and recovery heat treatment. The entire surface modification process includes dipping carbon steel specimens into a molten Al pool to form an Al coat, subsequent diffusion treatment at elevated temperature to form an aluminized layer, sandblasting to generate dislocation network or cells, and recovery treatment to turn the dislocation cells into nano-sized grains. The grain size of the nanocrystallized aluminized surface layer was in the range of 20–100 nm. Electrochemical properties, electron work function (EWF), and corrosive wear of the nanocrystalline alloyed surfaces were investigated. It was demonstrated that the nanocrystalline aluminized surface of carbon steel exhibited improved resistances to corrosion, wear and corrosive wear. The passive film developed on the nanocrystallized aluminized surface was also evaluated in terms of its mechanical properties and adherence to the substrate.     

Underwater detonation performance of the aluminum film explosive

A new aluminized explosive is proposed, and the approach is to replace the aluminum powder in the traditional aluminized explosive with an aluminum film. The purpose is not only to improve mechanical properties and lower the impact sensitivity of traditional aluminized explosives, but also to reduce environmental pollution in the aluminum particle production process. The pressure-time curves of the aluminum film explosive and RDX are measured in underwater explosion experiments. The peak pressure, impulse, shock wave energy, and bubble energy are obtained by analyzing the curves. The results of the study indicate that the peak pressure of the aluminum film explosive is lower than that of RDX. However, the aluminum film explosive maintains a high pressure for a longer period of time. The large amount of energy is found to liberate by subsequent reactions of the Al film with the primary detonation products. The increase in the explosion energy of the aluminum film explosive is based mainly on the increase in the bubble energy.     

热浸镀铝钢抗高温氧化腐蚀性能研究

在实验室条件下通过900℃、100h的不连续氧化增重试验研究了热浸镀铝钢的抗高温氧化腐蚀性能,结果表明,热浸镀铝钢单位面积氧化增重量为普通碳钢的1/4,其中浸镀层由表面的氧化膜、母体和扩散区组成,氧化膜具有优良的抗高温氧化性能。     

Lower temperature aluminizing and its effect on improving corrosion resistance of iron treated by surface mechanical attrition treatment

An ultrafine-grained surface layer with the average grain size of about 28 nm in the surface layer was fabricated on a pure Fe plate by the surface mechanical attrition treatment (SMAT). Lower temperature aluminizing treatments of the SMAT samples were investigated by scanning electron microscope and X-ray energy dispersive spectroscope. The electrochemical corrosion behavior of the aluminized SMAT sample was studied in 0.05 mol/L Na₂SO₄ + 0.05 mol/L H₂SO₄ solution, in comparison with the original SMAT and the coarse-grained sample. The results showed that SMAT had a negative effect on the corrosion resistance of Fe. An aluminized surface layer was formed on SMAT sample by aluminizing treatment at 400°C, which was much lower than that of the conventional aluminizing treatment. A successive lower temperature aluminizing process made the aluminized layer thicker and continuous. The SMAT sample treated by a successive lower temperature aluminizing had much higher corrosion resistance and exhibited passive behavior, which was due to the formation of a protective passive film.     

Nature of the passive film on nickel

The passive film formed anodically on nickel in borate buffer solution in both the passive and transpassive regions is found to be p-type in electronic character, corresponding to a preponderance of metal vacancies (over oxygen vacancies and nickel interstitials) in the barrier layer. However, at high anodic potentials, some n-type character was detected by Mott-Schottky analysis, which is probably due to the presence of free charge carriers (electrons) from the evolution of oxygen and/or the oxidative ejection of Ni³⁺ at the barrier layer/outer layer interface. The p-type character of the film is consistent with the diagnostic criteria obtained from the Point Defect Model for a passive film, in which the majority defect in the NiO barrier layer is the metal vacancy. The transpassive state is postulated to comprise a thick, porous oxide film on the surface, with the current probably being due to the oxidative ejection of Ni³⁺ species from the barrier layer and oxygen evolution within the pores, or both.     

自交联丙烯酸乳液改性BOPET薄膜表面

针对双向拉伸聚对苯二甲酸乙二酯（BOPET）电晕薄膜表面张力衰减效应和镀铝膜耐沸水蒸煮性能差的缺点,采用乳液聚合法合成自交联丙烯酸树脂乳液。使用该乳液涂覆BOPET薄膜,烘干交联后形成均匀、透明的涂覆层。测试结果表明,BOPET涂覆膜具有很好的抗表面张力衰减能力;镀铝涂覆膜具有很好的耐沸水蒸煮性能;涂覆层对BOPET薄膜的机械性能影响不大。     

RDX基铝薄膜炸药与铝粉炸药水下爆炸性能比较

为了减少铝粉炸药在生产过程中因铝粉对环境污染,降低铝粉炸药的撞击感度,提高含铝炸药的成型性及力学性能,将RDX用铝薄膜分层包裹得到新型的铝薄膜混合炸药。将铝薄膜混合炸药与铝粉炸药进行水下爆炸实验与爆速实验,得到两种炸药的爆速与压力时程曲线,经过分析计算得到两种炸药的压力峰值、冲量、冲击波能、气泡脉动周期与气泡能。结果表明：铝薄膜炸药药柱的轴向为RDX与铝薄膜独立贯通的结构,有利于降低混合炸药中添加物对基体炸药爆轰波传播的影响,从而使铝薄膜混合炸药的爆速高于铝粉炸药,导致铝薄膜炸药的冲击波损失系数高于铝粉炸药,使铝薄膜混合炸药的总能量、比气泡能与铝粉炸药相当情况下,其比冲击波能却降低了10.16%～10.33%,计算过程说明铝薄膜混合炸药的C-J压力计算公式具有合理性。