PET薄膜与光伏背板的拉伸强度、断裂伸长率与拉伸速度相关性分析

对聚对苯二甲酸乙二醇酯(PET)薄膜和光伏背板在不同拉伸速度下的拉伸强度、断裂伸长率性能进行测试、分析。结果表明,PET薄膜与光伏背板的拉伸强度随着拉伸速度的加快而降低,而其断裂伸长率变化不大。通过对检测结果的数据分析,探讨PET薄膜与光伏背板的拉伸强度、断裂伸长率与拉伸速度的相关性。     

太阳能电池背板用耐侯性PET技术

太阳能电池背板用氟膜价格居高不下,氟膜的替代材料——耐侯性PET薄膜成为研发热点。本文分析了主要专利申请人东洋纺、帝人杜邦与三菱3家公司耐侯性PET薄膜的专利技术,分析了耐侯性PET薄膜的耐紫外、耐水解和综合耐侯技术。     

太阳能电池背板市场

<正>Displaybank报道,2009年太阳能电池背板市场较2008年增长5%,达5000万平方米。在背板的技术动向方面,要求的水蒸气遮蔽性为结晶系(10-1 g/m2.d);薄膜系(10-2～3 g/mm2.d);有机系(10-5 g/mm2.d)以上。在多样化的提案上,提出的有以PVF夹PET的3层膜;All PET(复数积层或涂布)和PET+单种素材积层等。     

杜邦推新一代聚酯薄膜背板,传统光伏背板面临挑战

<正>伴随着我国作为光伏应用新兴大国的崛起,光伏产业的技术创新与市场竞争也空前激烈。近日,在北京举行的能源变革时代下光伏产业发展新趋势论坛上,美国杜邦帝人公司向与会者推介其最新一代创新型环保聚酯(PET)薄膜光伏背板,这从一个侧面也反映出相关领域技术竞争日趋激烈。据杜邦帝人背板中国唯一代理商——上海巨科电子科技有限公司总经理介绍,背板类型有两大类,即含氟聚合物     

杜邦推出新一代聚酯薄膜背板

<正>在近日北京举行的能源变革时代下光伏产业发展新趋势论坛上,美国杜邦帝人公司向与会者推介了其最新一代创新型环保聚酯薄膜(简称PET)光伏背板。据介绍,背板类型有两大类,即含氟聚合物的TPT结构背板和全PET结构背板。TPT结构背板由于该聚合物中含有卤素,在组件报废后,含氟聚合物回收再利用可能会存在一些困难。鉴于业内目前尚无有效的回收方案     

仪化20万t/a PET专用料项目开车成功

<正>2013年5月11日,仪征化纤公司20万t/a PET专用料项目一次投料开车成功,在做强PET主业、提升产品竞争力和市场份额方面又迈出新步伐。仪化膜用PET切片专用料,广泛应用于电子电器、食品包装、印刷、胶片、液晶显示器、太阳能电池背板材料等领域,占国内PET薄膜市场份额的30%以上。该项目建成投产后,仪化已拥有220万t PET聚合能力,进一步增加膜用和工业丝用PET切片产能,扩大优势产品竞争力和市场地位。     

光伏背板材料在湿热服役环境条件下的老化行为

选用7种不同类型的光伏组件用背板高分子材料为研究对象,在海南湿热环境条件下进行28个月的自然暴露试验,研究不同背板材料老化前后外观、力学性能、透水性和热性能等关键性能的变化。研究结果表明:背板C(PET/PET/PE)综合性能较稳定,耐高温高湿环境性能较好,是湿热环境中光伏组件背板材料的首选;含氟背板在透湿性及热性能上表现不稳定,不建议在湿热环境中使用。     

光伏背板用PET老化性能研究

利用湿热老化、热氧老化对PET及使用该PET为基材的光伏背板进行处理,测定了老化后PET及背板的力学性能,并利用红外、DSC、粘度测试等分析方法研究了PET在上述老化过程中官能团、结晶度、分子量以及断裂伸长率的变化情况,并探讨了这些物性的变化与PET微观结构变化之间的联系.     

可用于光伏背板的PP/PBT/Talc共混物薄膜的制备及探讨

针对聚对苯二甲酸乙二醇酯(PET)材料存在着水汽透过率过高和耐水解能力差的缺点,通过聚丙烯/聚对苯二甲酸丁二醇酯/滑石粉(PP/PBT/Talc)共混的方式制备得到一种薄膜材料应用于光伏制造业中的电池片背板,该材料具备了更加良好的电气绝缘性能,加强了背板对电池片的保护,保证了电池片的使用寿命。     

康维明2014年销量超3亿平方米跻身全球第三背板商

康维明宣布,2014年在全球背板行业竞争激烈的情况下,公司仍然发挥强劲势头,全球背板销量超过3亿平方米,晋升为全球第三大背板制造商。康维明全球太阳能光伏事业部销售总监Fabio Menicanti表示,“我们能够成为全球领先的PET背板生产商,与最专业的原料供应商的长期合作关系分不开。另外,我们的研发部门也一直致力于研发性能优异的PET背板。”     

瓶用聚酯薄膜气体渗透性能的比较

比较了PET聚合过程中加入1^#纳米添加剂和2^#纳米添加剂的瓶用聚酯薄膜以及热灌装瓶用聚酯薄膜与普通瓶用聚酯薄膜对氧气透气量的大小,试验表明加入2^#纳米添加剂的瓶用聚酯薄膜阻隔气体渗透性能较好,热灌装瓶用聚酯薄膜次之,加入1^#纳米添加剂瓶用聚酯薄膜阻隔气体渗透性能不佳。     

PET表面镀SiO_x薄膜的研究进展及应用

综述了采用磁控溅射技术和等离子体增强化学气相沉积技术制备SiOx/聚对苯二甲酸乙二醇酯(PET)薄膜的研究进展,探讨了SiOx/PET薄膜阻隔作用机理,此外还阐述了SiOx/PET薄膜的应用状况。     

Surface modification of PET films by a combination of vinylphthalimide deposition and Ar plasma irradiation

A new surface modification technique for PET films is proposed. This technique, called VPI modification technique, is a combination of two processes: The first step involves the deposition of vinylphthalimide (VPI) on the PET film surfaces, followed by Ar plasma irradiation of the VPI-covered film surfaces. The VPI modification technique led to large increases in the N/C atom ratio on the PET film surfaces. On the VPI-modified PET film surface, a new N_ls peak containing two components due to amide groups as well as imide groups appeared. The C_ls signal for the VPI-modified PET film surface also showed a new component due to ketone groups. These changes indicate that VPI reacted with the PET film surfaces to form nitrogen-containing groups. VPI modification made PET film surfaces hydrophilic. The VPI-modified film surfaces showed a decrease in water contact angle from 73 degrees to 48–56 degrees.     

少烟NEPE推进剂的动态力学性能

用动态力学分析方法研究了少烟NEPE推进剂及其黏合剂胶片的黏弹特性。结果表明,PET/N100胶片、PET/N100/NG-TEGDN胶片和推进剂样品在玻璃态的储能模量E′依次增大,PET/N100胶片的损耗模量E″最大,推进剂的E″最小;胶片和推进剂在玻璃化转变区的E′依次显著降低,E″和tanδ(β转变)依次达到最大值后逐渐降低,其中PET/N100胶片、PET/N100/NG-TEGDN胶片和推进剂的Tg分别为-82、-73和-65℃;在橡胶态,PET/N100胶片的E′和E″在-24℃附近出现峰值,PET/N100/NG-TEGDN胶片和推进剂的E′和E″随温度降低显著降低,且PET/N100胶片在-3℃出现明显的α松弛损耗峰,PET/N100/NG-TEGDN胶片和推进剂tanδ的α松弛峰温下降到-24℃。     

Surface modification of PET films by pulsed argon plasma

The rf power was modulated (discharge on‐time of 10 μs and discharge off‐time of 50–500 μs), for pulsed argon (Ar) and oxygen (O₂) plasmas used to irradiate PET film surfaces to modify the film surfaces. From data regarding the contact angle for the modified PET film surfaces and chemical analyses with XPS, effects of the rf power modulation on the surface modification are discussed. The pulsed Ar and O₂ plasmas are effective in modification of the PET film surface. There is no difference in the contact angle between the pulsed plasma and the continuous plasma. Furthermore, the pulsed Ar plasma is advantageous in formation of hydroxyl groups on the PET film surfaces. The rf power modulation has a possibility to modify into peculiar surfaces. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2845–2852, 2002     

Coating films prepared by photoreactions of the surface‐modified diamond powder and PET film with a binder agent

The surface‐modified diamond and PET film underwent photopolymerization rapidly with a binder agent to afford coating films of interpenetrating network (IPN) structure. The coating films thus formed exhibit higher tensile strength, thermal stability, and adhesion strength to the PET film. The inert surfaces of pristine diamond (PD) and PET film were modified by different chemicals and procedures to introduce epoxide and methacryloyl groups, respectively, on their surfaces. A coating agent consisting of an epoxide group containing modified diamond (called ED), a binder agent, and photoinitiators was prepared. After applying the coating agent to the substrate (a glass plate or a methacryloyl group containing PET film, MMA‐PET) and degassing under reduced pressure, the thin film of the coating agent was exposed to UV light (λ_max; 365 nm) at room temperature to yield a coating film of IPN‐structure. The tensile strength and thermal properties of the ED‐containing free coating film (called free film) increased with the amount of ED embedded, whereas the strength of the PD‐containing free film decreased with the amount of PD embedded. The adhesion strength of the coating film on the MMA‐PET improved significantly by the free radical polymerization of the methacryloyl groups on the MMA‐PET and the acrylate resin in the binder agent. The surface photoreactions of ED and MMA‐PET with the binder agent were confirmed by modeling. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Surface modification of polymers and improvement of the adhesion between evaporated copper metal film and a polymer. I. Chemical modification of PET

To improve the interfacial adhesion between evaporated copper film and poly(ethylene terephthalate) (PET), the surface of PET films was modified by treating with hydrazine monohydrate. The effect of the treatment time in the range of 5-20 min with 80 wt% hydrazine monohydrate at 60 °C on the number of polar groups created on PET was investigated. The surface topography of and water contact angle on the PET film surface, the mechanical properties of the PET film, and the adhesion strength of evaporated copper metal film to the PET film surface were also investigated. The introduction of polar groups on the modified PET film surface was examined by FT-IR and ESCA analyses. The amount of polar groups increased to the maximum value with increasing treatment time to 10 min, and thereafter it decreased markedly. The surface roughness increased with increasing treatment time up to 10 min and cracks occurred after 20 min. The water contact angle and tensile properties decreased with increasing treatment time. Using the scratch test, the adhesion between Cu film and PET was found to increase with increasing treatment time up to 10 min and thereafter there was a remarkable decrease in adhesion. From these results, it was concluded that the optimum treatment time with hydrazine monohydrate (80 wt%) at 60°C was about 10 min to improve copper-PET adhesion.     

Poly(vinyl alcohol) hydrogel fixation on poly(ethylene terephthalate) surface for biomedical application

A surface modification technique was developed for the covalent immobilization of poly(vinyl alcohol) (PVA) hydrogel onto poly(ethylene terephthalate) (PET) to improve the biocompatibility of the film. The PET film was first graft copolymerized with poly(ethylene glycol) monomethacrylate (PEGMA) in the presence of ethylene glycol dimethacrylate (EGDMA) as crosslinker, and then oxidized with a mixture of acetic anhydride (Ac₂O) and dimethyl sulfoxide (DMSO) to produce aldehyde groups on the PET surface. Finally, the prepared PVA solution was cast onto the film and covalently immobilized on the film through the reaction between the aldehyde groups on the PET film and the hydroxyl groups of PVA. The good attachment of the PVA layer to the PET film was confirmed by observing the cross-section of the PET-PVA film using scanning electron microscopy (SEM). Heparin was immobilized on the PVA layered PET using two different methods, physical entrapment and covalent bonding, to further improve the biocompatibility of the film. Attenuated total reflectance (ATR) FT-IR spectroscopy and X-ray photoelectron spectroscopy (XPS) were used to characterize the chemical composition of the surface modified films. The biocompatibility of the various surface modified PET films was evaluated using plasma recalcification time (PRT) and platelet adhesion.     

手机镜头遮光片的化学蚀刻消光方法

采用碱性蚀刻液与聚对苯二甲酸乙二醇酯(PET)发生水解反应的化学蚀刻方法对遮光片内孔壁进行消光处理,实验设置预实验和正交试验法,在高温条件下进行预实验对PET膜进行蚀刻,再对遮光片进行消光。通过分光光度计检测PET膜的透光率,扫描电子显微镜观察经过蚀刻后的遮光片是否呈现出凹凸雾面状态。结果表明,预实验中氢氧化钠溶液蚀刻后的PET膜较氢氧化钠与碳酸钠混合液蚀刻后PET膜透光率低,且氢氧化钠与碳酸钠混合液蚀刻的PET膜透光率较原PET膜的透光率相差不大,且经氢氧化钠蚀刻后的遮光片内孔壁呈现凹凸雾面状态。当蚀刻液为氢氧化钠溶液,反应温度为80℃,反应时间为15 min时,遮光片的内孔壁雾面程度越大,消光效果最佳。     

W18O49/PET-ITO柔性电致变色薄膜制备及其变色性能

采用溶剂热法制备W18O49纳米线电致变色材料，喷涂在聚对苯二甲酸乙二醇酯?氧化铟锡(PET?ITO)(方阻35 Ω)柔性透明导电基底上得到柔性电致变色薄膜。采用X射线衍射仪、扫描电子显微镜、高分辨场透射电子显微镜和X射线光电子能谱对W18O49的微观结构和价态等进行表征，用电化学工作站与紫外?可见光分光光度计对W18O49/PET?ITO柔性电致变色薄膜的光学调制范围、响应时间和循环稳定性等进行了表征和分析。结果表明，光谱扫描波长?=633 nm时，W18O49/PET?ITO柔性电致变色薄膜的光学调制范围ΔT=23%。薄膜透光率变化90%时，着色和褪色时间分别为12.8和10.6 s。W18O49/PET?ITO柔性电致变色薄膜具有优异的循环稳定性，连续着色褪色循环3000 s薄膜透光率仍达80.9%。