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硅溶胶和铝溶胶都是水溶性的无机粘合剂,它们运用于涂料工业,有良好的涂料固着性能,且抗污、防尘、防裂、耐火,是较好的涂料胶粘剂。硅溶胶:1.重氮型复写纸。以硅溶胶为主要成份的处理液在感光液涂布之前处理或与感光液混用,可使纸表面平滑,曝光范围宽,图象清晰.2.玻璃纸.在温度较高时容易发粘,给使用带来不便.若在生产的最后工序,使纸浸入硅溶胶和甘油单硬脂酸脂的混合液中,然后辊压干燥,可减少发 相似文献
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通过检测回流涂料、供应罐涂料和贮存罐涂料性质,并进行手工涂布实验,探讨涂料性质对涂布纸质量的影响,并提出解决措施。 相似文献
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在工厂的生产试验中,用工业帘式涂布机生产出了高光泽、不合磨木浆的单面涂布纸。研究了涂布量对成纸质量的影响。通过变化预压榨线压来改变原纸的粗糙度。生产试验前,通过中试涂布机确定了涂料的最佳固含量和黏度。生产出的卷筒纸经中试多压区压光机压光,再经刮刀涂布后进行胶版印刷,并将其作为参比样品。结果表明,用此技术生产的印刷纸与刮刀涂布纸质量相近,但预压光对成纸质量的影响很小。 相似文献
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目前涂布设备主要采用气刀涂布、辊式涂布或刮刀涂布的方式。其中,气刀涂布首先在原纸上涂上过量的涂料,再使用压缩空气形成的气刀计量的方法。该种方式是一种仿形涂布,具有更好的遮蔽性能。尤其适用于压敏性涂料的涂布,涂布量较大,涂布层比较均匀,涂布时不易发生断纸。但是该种形式的涂布机平滑度较低,表面平整性差,不能进行高固含量涂布,结构不紧凑,因气刀气流造成的涂料飞溅,会造成局部堵塞,以致引起涂层痕迹。 相似文献
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BTG公司介绍了一种具有新型现代化特点的凹面网辊预计量系统的应用。该“柔性印刷”的原理已成功地应用在BTG公司的Flexi-Flexo涂布机上,现在,又能很好地适用于Bill刮刀涂布机和TWIN-HSM涂布机。1凹面网辊系统的优点即使在非常宽的涂布量范围内,也能很容易地控制涂布量。对于给定的涂料,涂布量取决于凹面网辊的速度。具有适用高固含量涂料的涂布能力。当涂布量在5~6g/m2时,可使用固含量在65%以上的涂料。极佳的涂料分布和表面质量。测试表明,涂料分布非常好。凹面网辊赋予了优良的涂布表面质量。由于安装了凹面网辊系统,可使TWIN-… 相似文献
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从胶体化学理论出发,利用高分子溶液对溶胶的保护作用,往涂料体系中加入自制的聚丙烯酰胺,来控制低固含量彩喷纸涂料中胶粒的团聚。系统考察了保护剂聚丙烯酰胺的分子量,胶黏剂聚乙烯醇(PVA)的型号,以及两者与阳离子添加剂、聚乙烯蜡乳液助剂等的加入量对涂料体系稳定性的影响。通过单因素实验和正交试验确定了最佳的低固含量涂料配方为:硅溶胶(固含量30%)100g,聚丙烯酰胺(分子量1.11×104)0.6g,聚乙烯醇(型号PVA235)3g,固色剂(型号IJ-450,固含量30%)30g,聚乙烯蜡乳液(固含量35%)0.7g。 相似文献
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Highly dispersed silica nanoparticles used for fabric coating were synthesized via nonsurfactant template sol–gel reaction with tetraethoxysilane (TEOS) and γ-glycidyloxypropyltrimethoxysilane (GPTMS) in the presence of dodecanol, alkaline catalyzer, and ethanol. With the optimum conditions of 4 g of dodecanol, 3 mL of alkaline catalyzer, and 30 wt% GPTMS, the silica particle size was 305 nm and the polydispersity index was 0.022. FT-IR spectra confirmed that the alkyl chain and epoxy group of GPTMS had been bonded onto the surface of silica nanoparticles due to the characteristic peaks at 2980 and 910 cm?1. The GPTMS-modified silica nanoparticles presented higher dispersion compared with the unmodified particles from SEM micrographs. The anti-ultraviolet property and rubbing fastness of the coated fabrics were enhanced as the doped amount of modified silica nanoparticles were increased to 5 wt%. The nonsurfactant template sol–gel method presents simple, facile, and cost-effective potential on the promising application of preparing highly dispersed silica nanoparticles. 相似文献
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Silica sols, used as carriers to incorporate functional ingredients into textiles for obtaining desired functions, could also affect the properties of textiles. Thus, the effects of silica content, coating composition, and coating processes on the mechanical properties, wicking effect, water vapor transmission (WVT), moisture desorption, and handle of the coated cotton fabric were examined. The results indicated that coating cotton fabric using the tetraethoxysilane (TEOS)-derived silica sol with weak acidity was advantageous to the improvement of the tensile strength, especially at a higher curing temperature or longer curing time. Tearing strength, wicking height, and WVT rate of the coated cotton fabric all reduced in relation to the uncoated one, especially at a higher curing temperature, or longer curing time, or higher silica content, whereas the addition of (3-glycidyloxypropyl)-trimethoxysilane (GPTMS) weakened the negative effect, especially at lower molar ratios of TEOS to GPTMS. Bending length of the coated cotton fabric increased, especially at higher curing temperatures, or longer curing time, or higher silica content, whereas the addition of GPTMS reduced the negative effect, especially at lower molar ratios of TEOS to GPTMS. The moisture desorption rate of the coated cotton fabric decreased, especially at lower curing temperatures, or shorter curing time, or lower silica content, but the addition of GPTMS in this case did not have a remarkable effect. 相似文献
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A simple one-step superhydrophobic coating method for cotton fabrics based on a modified silica hydrosol is presented in this study. The modified silica hydrosol was prepared by the co-hydrolysis/co-condensation of methyl trimethoxy silane and a non-fluoro compound, hexadecyltrimethoxysilane, via water-based sol–gel reaction under alkaline condition in the presence of a surfactant. The as-obtained products were characterized by particle size analyzer, scanning electron microscopy, scanning probe microscopy, X-ray photoelectron spectroscopy, and thermal gravimetric analysis. Superhydrophobic cotton fabric with a water contact angle of 151.9° for a 5?μL water droplet and a water shedding angle of 13° for a 15?μL water droplet was successfully obtained. 相似文献
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改性硅溶胶在棉织物超拒水整理中的应用研究 总被引:1,自引:1,他引:1
利用溶胶-凝胶技术,以十二烷基三甲氧基硅烷和四乙氧基硅烷作为反应前驱体,在室温条件下制备无氟超拒水改性硅溶胶,并将其通过浸-轧-烘的方式在纯棉织物上应用.纳米粒度仪测试结果表明,制备的SiO2颗粒尺寸大多集中在5~8 nm;能谱仪测试结果表明,整理后棉织物表面有硅元素存在;接触角测试结果表明,纯棉织物对水接触角(5 μL)由整理前的0°变为整理后的151°;扫描探针显微镜测试结果表明,相比未处理棉纤维,处理后棉纤维表面粗糙度大大提高.粗糙度的提高和低表面能物质的引入是拒水性提高的主要原因,符合Wenzel模型. 相似文献
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为获得具有良好阻燃性能的蚕丝织物,在硅溶胶中加入磷酸硼阻燃剂,采用轧-烘-焙的方法对蚕丝织物进行阻燃整理。同时采用扫描电子显微镜、能谱仪、极限氧指数、红外光谱等手段对整理前后蚕丝织物的表观形态、元素分布和阻燃性能等进行测试和表征。结果表明:将100 mL 硅溶胶、50 mL 去离子水、30 g/L 磷酸硼、50 g/L 柠檬酸、40 g/L 酒石酸、45 g/L 次亚磷酸钠于80℃搅拌3 h 后制得掺杂改性硅溶胶,把蚕丝织物浸入制备的硅溶胶中一定时间后取出,于170℃ 焙烘3 min,此时得到的蚕丝织物具有最佳的阻燃性能,其极限氧指数LOI 值为30.6%,且具有较好的耐水洗性。 相似文献