以质取胜 为发展中及新兴工业国家提供可持续物流解决方案

<正>由聚碳酸酯制成的五加仑循环使用水桶,确保饮用水的可靠供应勒沃库森,2010年7月——五加仑聚碳酸酯透明水桶是提供清洁饮用水的理想之选。来自拜耳材料科技的模克隆WB1239是一种针对水桶业的     

瓦克嘉奖超平硅片工艺研发人员

5加仑（18．93L）聚碳酸酯透明水桶是提供清洁饮用水的理想之选。来自拜耳材料科技的模克隆WB1239是一种针对水桶业的需求量身定制的独特产品。用该材料制成的大容量透明水桶可清洁和重新灌装多达50次以上。     

广东拟统一采用聚碳酸酯材料的饮用水桶

<正>广东省瓶装饮用水行业协会会长罗坦日前在2008年饮用水行业高峰论坛上说,协会已出台广东省食品级饮用水桶标准草案,拟统一采用聚碳酸酯材料制作饮用水桶,以规范目前质量参差不齐的饮用水桶市场。     

科思创与农夫山泉签署聚碳酸酯水桶回收增值再利用合作协议

正2020年1月10日,材料制造商科思创与农夫山泉和聚碳酸酯回收企业奥塞尔签署了一项19L聚碳酸酯水桶回收增值再利用三方合作协议。通过此次合作,三方将进一步优化农夫山泉19L聚碳酸酯水桶回收效率,提高回收过程的可追溯性与回收品质,赋予不再使用的水桶以第二次生命。签约仪式于今日在农夫山泉杭州总部举行。     

拜耳开发聚碳酸酯透明水桶

<正>日前,拜耳材料科技公司成功开发了5加仑聚碳酸酯透明水桶,可作清洁饮用水的包装材料。这种水桶的质量仅约750g,比同样大小的玻璃瓶要轻85%。与其他材料如聚对苯二甲酸乙二醇酯(PET)及聚丙烯(PP)、聚氯乙烯     

济三选煤厂粗煤泥截粗试验

通过分析济三选煤厂煤泥水系统工艺流程,说明煤泥水桶溢流量大,超粒度物料进入压滤循环系统,离心液中大量末精煤经筛网离心机处理后直接变成煤泥混入中煤,+0.1753 mm物料进入煤泥水系统后成为产品煤泥,损失了精煤等原因造成了选煤厂煤泥水系统跑粗,提出了解决系统跑粗问题的关键在于控制煤泥水桶溢流、斗子捞坑的入料粒度及旋流器溢流。通过在煤泥水桶四周建溢流堰,增加倾斜角度的筛板,建集料桶,安装煤泥振动筛和弧形筛,将进入捞坑的所有水全部打至煤泥水桶等措施对粗煤泥回收系统进行了工艺改造。最后对选煤厂改造效果进行了分析,结果表明:选煤厂改造完成后,减少了粗颗粒进入压滤系统,减轻了煤泥水系统压力,提高了精煤产率,降低了设备事故率,每年可回收末精煤3652.11 t,创造效益189.91万元。     

聚碳酸酯饮用水桶中回收料的鉴别及其质量安全

研究添加回收料的聚碳酸酯(PC)饮用水桶的鉴别方法,并以双酚A(BPA)的迁移为考察指标,分析回收料的添加对PC饮用水桶质量安全的影响。采用红外光谱(FT IR)、扫描电子显微镜(SEM)、紫外可见光谱(UV-Vis)方法对收集的5只PC饮用水桶(3只为原生料桶,2只添加有回收料)进行鉴别,并在食品模拟液(蒸馏水)中回流4h的浸泡条件下,采用高效液相色谱方法研究对比了5只饮用水桶中BPA的迁移行为。添加回收料的PC饮水桶(IV和V)断层表面存在大量疑似未塑化的团聚物(直径100μm),且UV-Vis特征吸收峰的吸光度1.0,与原生料饮用水桶I、水桶II和水桶III形成鲜明对比。并且,前者BPA的迁移量相当于后者的2~4倍。因此,FT IR、SEM结合UV-Vis方法可初步区分PC原生料与回收料,但仍需开发更有效的鉴别方法;添加回收料的PC饮水桶存在一定的安全隐患,应杜绝生产和使用。     

水力分级旋流器在葫芦素选煤厂的改造实践

分析了葫芦素选煤厂水力分级旋流器入料及产品粒度组成，在高浓度入料的情况下，入料中的高灰细泥形成了次生介质，在分级旋流器中出现了较强的分选现象，影响了分级效率。通过在水力分级旋流器入料煤泥水桶上增加液位—补水自动控制系统，降低旋流器入料浓度，可减弱旋流器内部分选作用，提高分级效率。同时将煤泥水桶的自动液位系统与旋流器入料压力匹配，有效提高了水力分级旋流器的分级效率。     

塑料包装材料主要产品发展方向

当前可发展塑料包装产品有热收缩包装薄膜、缠绕包装薄膜、塑料托盘、PC饱水桶、CJ软玻璃、PP流延包装膜、发泡PP片材、PP合成纸等。     

ANSYS在模具结构优化设计中的应用

通过对拖把水桶模具结构的有限元计算与分析，给出了该模具在工作状态下的位移和应力分布情况。为模具的设计和改进提供了理论依据。     

如何回收利用废聚酯瓶

介绍一种先进的废聚酯瓶回收利用的工艺过程。废聚酯瓶可用来制造聚酯长丝,生产DMT和EG,或直接转化为聚酯瓶-“瓶到瓶”的工艺过程。     

Separation of endocrine disruptors from aqueous solutions by pervaporation: Dioctylphthalate and butylated hydroxytoluene in mineral water

We examined the existence of endocrine disruptors in mineral water, ultrapure water, and tap water. GC/MS analysis revealed that dioctylphthalate (di‐n‐octylphthalate and di(2‐ethylhexyl)phthalate) in the water was found to be on the order of parts per billion. The dioctylphthalate concentration remained consistent for mineral water of the same brand, regardless of whether it was bottled in a PET bottle or a glass bottle. Therefore, the dioctylphthalate contamination in mineral water originated from the manufacturing line of the mineral water and not as a result of leaching from PET bottles. Butylated hydroxytoluene (BHT), an oxidization prevention agent in plastics, was detected at 2.05 ± 0.1 ppb in the mineral water bottled in glass bottles, but was not detected in the mineral water bottled in PET bottles. BHT contamination in the mineral water in the glass bottles is likely to have originated from the cap of the glass bottles, as the caps were sealed with polyethylene. We further investigated the feasibility of separating dioctylphthalate and BHT from the mineral water by pervaporation using hydrophobic polydimethylsiloxane membranes. We found that trace amounts (on the order of parts per billion) of organic chemicals such as dioctylphthalate and BHT in aqueous solutions can be removed and concentrated by the pervaporation using polydimethylsiloxane membranes. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 1737–1742, 2004     

Migration of organic compounds from PET/clay nanocomposites: influences of clay type, content and dispersion state

Polyethylene terephthalate (PET) bottles are widely used for packaging mineral water or soft drinks. Migration of toxic residual phthalate esters from PET could potentially change the quality of the bottled contents. The main purpose of this study is to control the migration of five different phthalate esters from PET bottles into the water they contained. To achieve this goal, three different types of nanoclay particles were added to PET to slow down the migration of the toxic phthalate esters. The concentration of phthalate esters in the water in contact with PET and PET/nanoclay was measured by gas chromatography (GC-FID) combined with the directly suspended droplet microextraction method. Good precision, accuracy and reproducibility over a wide linear range were achieved by the proposed technique under optimal conditions. The experimental results reveal that adding nanoclay fillers to the PET decreases the release of the above-mentioned chemicals from PET into the water considerably due to attainment of a tortuous diffusive path. Data also indicate the significant effect of nanoclay volume fraction and exfoliated morphology on obtaining efficient barrier properties. Furthermore the effects of parameters such as storage time, temperature, and amount and type of nanoclay inclusions were studied on the migration rate, as well.     

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。     

Investigation of the effect of hydrolysis products of postconsumer polyethylene terephthalate bottles on the properties of alkyd resins

Hydrolysis of waste polyethylene terephthalate (PET) flakes obtained from grinding postconsumer bottles was carried out at 200–230°C and molar ratios of PET/H₂O were taken as 1/5; 1/10; 1/20. The reaction products, when extracted with boiling water, yielded a water soluble crystallizable fraction (WSCF) and a water insoluble fraction (WIF). These fractions were characterized by acid and hydroxyl value determinations and DSC analysis. WSCF and WIF were used for preparation of alkyd resins. Five long oil alkyd resins were prepared from phthalic anhydride (PA) (reference alkyd resin) or hydrolysis products of the waste PET (PET‐based alkyd resin), pentaerithrithol (PE), soybean oil fatty acid (SOFA), and ethylene glycol (EG). Film properties and thermal degradation stabilities of these alkyd resins were investigated. Drying time, hardness, alkaline resistance, and thermal oxidative degradation resistance of the PET‐based alkyd resins are better than these properties of reference resin. The results show that hydrolysis products of waste PET obtained from postconsumer bottles are suitable for manufacturing of alkyd resins. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers     

PET瓶双向拉伸吹塑成型技术

简述了注拉吹和压拉吹成型PET瓶的生产工艺技术和PET瓶今后的发展趋势     

制造耐热聚酯瓶的新方法

在分析现有国内外热灌装聚酯瓶制造技术的基础上,提出一种制造耐热105℃聚酯瓶的新方法,给出了试验装置及样瓶的检测结果,该方法可用于减轻瓶质量和应用于100℃以上的灌装。该方法已授予发明专利,热灌装聚酯瓶的制造技术,可朝着更高温度灌装和广口热灌装的应用发展。     

PET瓶的常见质量缺陷分析

介绍了PET树脂的特点,叙述了性能各异的PET瓶的生产工艺流程。详细分析了冷灌装瓶和热灌装瓶的常见质量缺陷及处理措施。     

Synthesis and film properties of epoxy esters modified with amino resins from glycolysis products of postconsumer PET bottles

Glycolysis of waste polyethylene terephthalate (PET) flakes obtained from grinding postconsumer bottles was carried out at 225–250°C and molar ratios of PET/ethylene glycol were taken as 1/1, 1/1.5, 1/5, and 1/10. Reaction product was extracted by hot water for three times and water‐soluble crystallizable fraction and water‐insoluble fraction were obtained. These fractions were characterized by acid and hydroxyl value determinations, differential scanning calorimeter analysis, and ¹H‐NMR analysis. Glycolysis product was used for synthesis of PET‐based epoxy resin. This epoxy resin was used to prepare epoxy ester resins having 40% and 50% oil content. Epoxy ester resin having 40% oil content was modified with urea‐formaldehyde and melamine‐formaldehyde resins for synthesis of epoxy ester–amino resin. Physical and chemical film properties of epoxy ester and modified epoxy ester resins were investigated. All the epoxy ester and modified epoxy ester films were having excellent adhesion, water, and salt water resistance properties. Modification of PET‐based epoxy ester resins with amino resin has significantly improved hardness, impact resistance, and alkaline and acid resistance of resin films. As a result, PET oligomers obtained from glycolysis of postconsumer PET bottles are suitable for manufacturing of amino‐resin‐modified epoxy ester resins that have improved physical and chemical surface coating properties. POLYM. ENG. SCI., 55:2519–2525, 2015. © 2015 Society of Plastics Engineers     

PET瓶回收技术进展

介绍了目前国内外PETPET瓶的使用和回收概况。简述了PET瓶的解聚、扩链等化学回收方法以及简单回收、溶解／再沉淀法和熔融挤出法等物理回收方法的最新技术进展。