纸板的挺度

主要用作包装材料的纸板,其挺度是特别重要的质量参数。对于单位宽度的均质纸板,挺度随弹性模数E和厚度立方乘积的增加而增加。多层纸板中每层纸对挺度的作用与该纸层到纸板中性层距离的平方和它本身抗张强度成正比。这说明整个纸板的挺度主要是外层纸挺度值的函数。纸板的中心部分使纸板松厚,起填充作用,并增加了面层和底层对纸板挺度的作用。     

瓦楞纸板装饰加工技术面面观

纸板是瓦楞纸箱、纸盒等产品生产的主要原材料,它的性能直接或间接影响产品的内在质量和使用性能。对瓦楞纸箱、纸盒等包装产品来说,具有耐磨、防水和防潮性能,并且具有较高的强度和较好的气密性,是纸板使用特性的基本质量要求。但是,纸厂生产出来的普通纸板,往往不具备良好的耐磨性、防水性和防潮性能等。纸板的强度和气密性则因纸板的质量等级不同而有所差异。     

废旧箱纸板生产皮克隆纸板若干质量问题及其控制

本文介绍了一种低档鞋用纸板——皮克隆纸板的生产工艺流程、质量要求及其产生内在质量与外观质量问题的分析。     

纸板涂布机的发展现状

纸板涂布机在近20年中发展很快,传统的计量棒涂布加气刀涂布已不能满足日益提高的涂布纸板的印刷质量要求。Combi-Blade组合刮刀涂布和Vari-Bar可调刮棒涂布的开发成功,纸板涂布工艺也从二次涂布增加到三次涂布,大大改善了涂布纸板的质量。     

纸板涂布机的发展现状

纸板涂布机在近20年发展很快,传统的计量棒涂布加气刀涂布不能满足日益提高的涂布纸板的刷质量要求。Combi-Blade组合刮刀涂布和Vari-Bar可调刮棒涂布的开发成功,纸板涂布工艺也从二次涂布增加到三次涂布,大大改善了涂布纸板的质量。     

谈灰纸板生产质量控制问题

谈灰纸板生产质量控制问题莫慧心一、前言灰纸板（ＧＲＡＹＣＨＩＰＢＯＡＲＤ）是近年发展起来的中档工业用纸板，灰纸板的主要质量要求有定量、厚度、挺度、水份等几个重要指标（见表一）。灰纸板主要用途是高定量多层复合纸板加工、制盒、制箱、制袋（作内衬）及玩具生...     

印刷纸张及纸板的储存保管

纸张及纸板是印刷的主要原料之一。我国加入世贸组织后,书刊质量标准和国际接轨,彩色包装印刷品增多,对纸张和纸板的质量要求越来越高。随着胶印的迅猛发展,我国造纸业质量标准化也在逐步提高。但是,到目前为止,有许多印刷厂对印刷纸张和纸板的储存保管工作做得并不理想,已不适应今后快速发展的印刷形势的要求。因此,印刷纸张及纸板的储存保管实行正规化、科学管理已势在必行。     

应用新型脱水机构提高纸板质量

随着印刷包装业的迅速掘起，发展和集约，其对高档涂布白纸的质量要求越来越高，其中纸板的挺度，纸板的适印性能为最关键的两类质量指标。众所周知，纸板挺度对制盒、包装强度质量直接有关，而纸板的适印性能是多方面的，主要有油墨吸收性、油墨干燥速度和Ｚ向强度。由于印刷机档次的普遍提高，印刷速度亦大幅度提高。随之而来的，对纸反的印刷适印相应地提出了更高的要求。对于涂布白纸板生产厂家来说，如何在原料结构不变，基于生     

喷雾淀粉与纸板的层间结合强度

一、前言众所周知，纸板是一种重要的产品包装装璜材料，其质量的好坏，对被包装产品的档次和“身价”起着重要的作用。因此，纸板产量和质量与一个国家的国民经济发展有着密切的关系。国民经济日趋发展，商品数量不断增加，质量不断提高，所需的包装装璜材料也相应增加，要求也更高。近年来，随着我国国民经济的快速发展和人民文化生活水平的不断提高，产品的包装日益趋向于高档和精美。所以，对产品包装的主要原材料──纸板本身的质量要求也越来越高。特别是对于像单面涂布白纸板这种要求既能适应多色高速和自动先进印刷设备印刷，又能满…     

高强纱管纸板的开发与研制

本文介绍了高强纱管纸板的质量要求，并阐述了用AOCC废纸生产高强纱管纸板在工艺上的可行性，同时介绍了生产高强纱管纸板时一些工艺参数的控制情况，以及与国外同类产品的比较情况。     

高光泽箱纸板加工的探讨

介绍了箱纸板加工整饰方法及影响高光泽度的要素,展望了高光泽度箱纸板的前景.     

新型包装技术——纸板封盖

<正> 配备有纸板封盖的圆柱体或非圆柱体纸筒,采用全纸板材料包装,使用方便,而且成本低,可与折叠式纸盒或组合罐相媲美。完整的双切痕纸板盖开启便利和可靠,配备有防盗拉链条或拉条。产品的提取方便快捷,并能完好地保护产品。     

瓦楞纸板、纸箱的发展动态

本文综述了国内外在瓦楞纸板、纸箱制造业及相关技术方面的近期进展。文中论及了瓦楞原纸成形工艺、瓦楞纸板机的关键部件以及新型瓦楞纸板的开发等进展状况,并对提高瓦楞纸箱的抗压强度问题进行了探讨。     

Analysis of Direct Contact Paper and Paperboard Food Packaging for N-nitrosomorpholine and Morpholine

Analytical methods were developed to estimate the nitrosatable morpholine and apparent N-nitrosomorpholine content of paper and paperboard direct contact food packaging. Examination of 34 different paper or paperboard food packages indicated 9 to be contaminated with detectable levels of apparent N-nitrosomorpholine. All 12 packages analyzed for nitrosatable morpholine were positive with an average level of 380 μg/kg. Migration of apparent N-nitrosomorpholine and morpholine to food was demonstrated when paper or paperboard and dry food were incubated in a closed container for 3 days at 100°C.     

包装卡纸性能指标分析与控制

通过对市场上销售的白卡纸在印刷包装过程中出现的问题进行总结和分析,得出用于卡纸质量评价的几个重要指标,并对其影响因素做了分析,提出了提高白卡纸印刷质量的造纸工艺要求。     

Influence of packaging material on pomegranate juice colour and bioactive compounds,during storage

Pomegranate juices were assessed after pasteurisation and storage in different packaging materials: transparent and green glass, and paperboard carton with polyethylene layers (Minibrik‐200). The main objective was to establish the influence of the container on the stability of colour and bioactive compounds (anthocyanins, ellagic acid and other non‐coloured phenols). Results showed that non‐coloured phenols and ellagic acid were quite stable during the storage period. In contrast, anthocyanins degraded, to an extent directly proportional to colour loss, less for those juices stored in glass bottles than for those stored in Minibrik. These results indicated that these paperboard carton containers are oxygen permeable, and that oxygen has a greater influence on anthocyanin, and consequently on colour degradation, than light on pomegranate juice during storage. Nevertheless, the antioxidant activity was not influenced by the packaging material employed. Copyright © 2004 Society of Chemical Industry     

阅读类印刷品产品质量安全分析

对小学教科书、儿童读物类阅读印刷品的产品质量安全指标进行测试分析,重点关注耐摩擦色牢度、可迁移性元素、挥发性有机化合物、荧光增白剂等安全性能。结果表明,该类幼儿及儿童阅读印刷品存在一定的质量安全问题。     

Chemical and microbial stability of fluid milk in response to packaging and dispensing

Chemical and microbiological stability of milk packaged in one litre pouches, a two litre paperboard box (with plastic liner) or a one gallon plastic jug were compared. The cardboard box gave the greatest protection against light induced lipid oxidation while significantly higher microbial populations were found in the larger containers (gallon jug and paperboard box) than in the smaller containers (one litre pouches) after one week of storage. Microbial populations were also greater in milk whose package had been opened and dispensed from previously than from milk found in an unopened package. These microbial data would suggest that one gallon of milk would remain fresher for the consumer when packaged in multi-unit packages than if packaged in one single container.     

Water and Oil Resistance of Special Paperboard for Petroleum Packaging

The influence of different coating formulas and times on the water and oil resistance of paperboard was studied.The water and oil resistance of paperboard coated with a modified butadiene-styrene copolymer latex and fluorinated anion grease-proof agent was better than that coated with modified butadiene-styrene copolymer latex,where the modified butadiene-styrene copolymer latex was used as the pre-coating substrate and the F1516 fluorinated grease-proof agent was used as the top coating material.By coating modified butadiene-styrene copolymer latex with 30％ solid content and F1516 fluorinated grease-proof agent with 24％ solid content,the oil resistance of paperboard could reach anti-oil grade 12 and the water resistance could increased by 98.64％ (compared with the base paperboard without any coating treatment).     

Migration of bisphenol A and benzophenones from paper and paperboard products used in contact with food

Migration of bisphenol A (BPA) and benzophenones, i.e., benzophenone (BZ), 4-(dimethylamino)benzophenone (DMAB), Michler's ketone (MK) and 4,4'-bis(diethylamino)benzophenone (DEAB), from 21 paper and paperboard products (15 recycled paperboard boxes and 6 virgin paper products) used in contact with food was examined. Migration levels of compounds from recycled paperboard were compared under various food-simulating conditions. BPA showed the highest migration into 20% ethanol and benzophenones into 95% ethanol. No compounds migrated from virgin paper products, but compounds did migrate into food simulants from recycled paperboard food boxes. BPA migrated into 20% ethanol from all recycled paperboard food boxes between 1.0 and 18.7 ng/mL. Into 95% ethanol, migration of BZ was observed in 8 samples (1.0-18.9 ng/mL), DMAB in 12 samples (1.2-3.7 ng/mL), MK in 13 samples (1.9-9.0 ng/mL), and DEAB in 13 samples (1.0-10.6 ng/mL). The highest migration level was 27.2 ng/mL and most of the migration levels were below 10 ng/mL. These values are sufficiently low compared with the TDI and NOAEL levels. Moreover, the amount of food in daily meals that comes into contact with paperboard products is relatively small. Consequently, it was concluded that there was no safety concern regarding the tested compounds in recycled paperboard food boxes.