柔性版预印刷——瓦楞纸箱印刷的新潮流

瓦楞纸箱印刷在我国目前已成为一个独立的行业,尤其是在近几年中发展极快。以前瓦楞纸箱在人们的印象中是一种用于运输的包装产品,制造粗糙,印刷质量低,图案单调,以色块、单色、大字体为主调。近几年一些企业引进了国外的瓦楞纸箱柔性版印刷、模切、开槽机后,产品的档次有了较大的提高,一些企业已着手逐步向彩色网线版印刷方向迈进。瓦楞纸箱产品由运输型包装向瓦楞纸箱销售型包装发展。这样对纸箱行业的要求越来越高,同时加剧了纸箱行业之间的竞争,促使许多企业采用新工艺、新设备、新材料来满足日益发展的市场需求。同时市场也要求纸箱行业逐步向彩印化和彩色包装发展。目前瓦楞纸箱的彩印化和彩色包装,一些企业采用面纸先用胶版印刷,然后单机复裱瓦楞,这样解决了产品印刷的质量档次问题。但是也有一些问题,如工艺繁复、生产成本高、生产周期延长、纸箱强度降低、印刷材料受     

钢桶合格率下降原因初探：从《中国包装报》一篇文章谈起

《中国包装报》1994年第659期头版刊登了张鹏搏同志《浙江上半年质检工作结束》的文章,读来耐人寻味。该文章中有这样两段话:在这次包装产品抽检中,瓦楞纸箱的合格率比1993年提高了25.9个百分点。据分析,瓦楞纸箱生产企业的质量意识有所提高,在激烈的市场竞争中,产品质量和企业生存紧紧地联系在一起。另一方面,瓦楞纸箱产品正在实施生产许可证管理,促使产品质量得到较快地改进与提高。同时全省纸箱行业调整工价,在价格上保证纸箱生产有一     

加强纸箱行业管理促进质量效益提高

加强纸箱行业管理促进质量效益提高浙江省包协纸制品包装委员会秘书长张鹏搏近几年来，浙江省纸箱行业发展迅猛，成为包装行业中一个大的产业。在包装产品中，纸箱占６０％左右，成为本省包装产品中的支柱产品。据不完全统计，本省目前有生产瓦楞纸箱企业４０００余家，并...     

如何做好瓦楞纸箱产品质量的控制

提高瓦楞纸箱产品生产的合格率，是当前纸箱企业质量控制、生产管理中值得重视和关注的话题，从有关工厂自检的数据和有关技术监督部门的抽检报告情况来看。目前，纸箱产品确实有一些指标存在不合格情况，影响了商品包装的使用效果，这是客户所不能接受的．所以，提高纸箱生产的合格率．是工厂生产技术和质量控制的重要工作任务。根据笔者的质量控制和生产管理工作体会，提高瓦楞纸箱产品的质量．主要应从以下几方面入手进行技术控制，才能达到最大限度地降低纸箱的生产成本．提高企业的经济效益，使企业在市场竞争日益激烈的环境下立于不败之地。[编者按]     

低温瓦楞纸箱抗压性能试验方法研究

针对冷链运输包装对瓦楞纸箱的耐低温要求,通过对多家纸箱使用企业和生产企业的走访调查和试样采集,在深入研究分析普通瓦楞纸箱抗压性能试验方法的基础上,根据冷链运输物品的仓储、倒库实际状况对瓦楞纸箱抗压性能的要求,对低温包装瓦楞纸箱的抗压性能指标进行了试验方法论证,提出了适合冷链运输包装用低温瓦楞纸箱的抗压性能指标检测方法。     

浙江商检局关于杭州地区1995年包装纸箱质量情况的通报

1995年是浙江省出口包装纸箱生产企业较为困难的一年。上半年,纸箱原辅材料涨幅较大,导致纸箱生产成本上升,利润下降,致使不合格纸箱产品增加。为此,浙江进出口商品检验局陆续召开了“全省出口包装纸箱质量分析会”,“全省出口包装纸箱材料生产厂质量座谈会”,一方面支持纸箱厂团结协作,坚决执行有关部门制定的“质量保护价”,另一方面对质量不稳定和质量较差的工厂分别要求整改和实行暂不受理报验、停产改进的办法,定期公布物理性能检测结果和其他质量情况,下发了“关于加强对出口商品运输包装瓦楞纸箱用纸质量管理的通知”,强化了出口包装纸箱原材料用纸质量的监督管理,加强了“出口包装检测中心”的服务功能,与工厂共同研究加强从纸张落料程序开始到     

“东方之星”首届瓦楞纸箱质量评比活动通知(节选)

各相关企业: 随着人们生活水平日益提高,传统的销售方式正在发生新的巨大变革。商品的中包装日益被市场和最终消费者所接受,瓦楞纸箱的后道加工引起生产企业和设备制造商的高度重视,循环经济对纸箱行业的绿色环保和包装减量化提出了更高的要求。为努力适应市场和行业发展需求,改变当前个别瓦楞纸箱企业低水平价格竞争现象,提高瓦楞纸箱质量水平,倡导行业发展的新理念,经上海、浙江、江苏“两省一市”包装技术协会共同协高决定,从     

冷链食品运输包装用低温瓦楞纸箱研究

针对冷链食品运输包装对低温瓦楞纸箱的特殊需求,深入广州、深圳多家纸箱使用企业和生产企业进行了走访调查和试样采集,在深入分析普通瓦楞纸箱性能指标的基础上,采取低温条件下处理试样并对试样技术指标进行检测的方法,对低温包装瓦楞纸箱的各项性能指标进行了实验论证,提出了适合冷链食品运输包装用低温瓦楞纸箱的各项性能指标标准和检测方法,解决了冷链食品运输包装中常出现的塌箱、破损等问题。     

全系列瓦楞纸箱

上海市复建包装公司组建于1991年6月，发展至今有7个核心企业，5个控股企业。公司主要产品有各种规格的瓦楞纸板、纸箱、彩印、彩盒、制版和造纸。公司年产瓦楞纸箱5000万平方米，各种异型模切纸盒，纸箱2000万只，70％产品为外贸出口包装瓦楞纸箱。公司主要生产设备有1．8米三     

浙江纸箱行业应适度调控

浙江省纸箱行业近年来发展迅猛，据不完全统计，日前约有大小纸箱生产企业4000余家，其中85％以上仍属简陋、落后的单机生产，纸箱质量很差。至去年10月，全省已有自动瓦楞纸板生产线84条，加上400余台单面机生产设备，按70％运输率计算，全年可生产瓦楞纸板50亿平方米以上。浙江省出口瓦楞纸箱约占4O％左右，据省商检局提供的1996年全省出口瓦楞纸箱5亿平方米左右的数字，不难看到浙江省瓦楞纸箱生产供过于求的状况相当严重，以致造成企业间产生互相不正当的竞争，步履艰难。为此，包装界有识之士正在吁请有关部I］对浙江省的纸箱行业采取…     

检定和校准证书的异同与应用

本文介绍了检定和校准以及证书的两点相同、五点不同之处,说明了对检定证书和校准证书的正确应用。     

Heat and Mass Transfer and Modeling and Prediction of Environmental Catastrophes

Basic definitions and concepts of the physicomathematical theory of natural catastrophes are given. Possibilities of mathematical modeling of natural and technogenic catastrophes are discussed in the context of the theory of heat and mass transfer and the mechanics of reacting media. The importance of taking into account conjugate heat and mass exchange in modeling catastrophes is emphasized. A formula for evaluating the probability of a collisional catastrophe is given.     

Multi-ferroic and magnetoelectric materials and interfaces

The existence of multiple ferroic orders in the same material and the coupling between them have been known for decades. However, these phenomena have mostly remained the theoretical domain owing to the fact that in single-phase materials such couplings are rare and weak. This situation has changed dramatically recently for at least two reasons: first, advances in materials fabrication have made it possible to manufacture these materials in structures of lower dimensionality, such as thin films or wires, or in compound structures such as laminates and epitaxial-layered heterostructures. In these designed materials, new degrees of freedom are accessible in which the coupling between ferroic orders can be greatly enhanced. Second, the miniaturization trend in conventional electronics is approaching the limits beyond which the reduction of the electronic element is becoming more and more difficult. One way to continue the current trends in computer power and storage increase, without further size reduction, is to use multi-functional materials that would enable new device capabilities. Here, we review the field of multi-ferroic (MF) and magnetoelectric (ME) materials, putting the emphasis on electronic effects at ME interfaces and MF tunnel junctions.     

CellML and associated tools and techniques

We have, in the last few years, witnessed the development and availability of an ever increasing number of computer models that describe complex biological structures and processes. The multi-scale and multi-physics nature of these models makes their development particularly challenging, not only from a biological or biophysical viewpoint but also from a mathematical and computational perspective. In addition, the issue of sharing and reusing such models has proved to be particularly problematic, with the published models often lacking information that is required to accurately reproduce the published results. The International Union of Physiological Sciences Physiome Project was launched in 1997 with the aim of tackling the aforementioned issues by providing a framework for the modelling of the human body. As part of this initiative, the specifications of the CellML mark-up language were released in 2001. Now, more than 7 years later, the time has come to assess the situation, in particular with regard to the tools and techniques that are now available to the modelling community. Thus, after introducing CellML, we review and discuss existing editors, validators, online repository, code generators and simulation environments, as well as the CellML Application Program Interface. We also address possible future directions including the need for additional mark-up languages.     

Synthesis and luminescent properties of alkali-metal and ammonium fluorosulfatozirconates and fluorosulfatohafnates

We have synthesized a variety of alkali-metal and ammonium fluorosulfatometallates (titanates, zirconates, and hafnates). The alkali fluorosulfatozirconates and fluorosulfatohafnates have been shown to exhibit efficient roentgenoluminescence (RL) in the UV through visible spectral region, with a maximum at 390–440 nm. Their RL spectra depend significantly on their composition (cation, anion, and water content), coordination of KF and K₂SO₄, and relative amounts of fluorine and SO₄ groups. We have examined the effect of heat treatment on the RL of these compounds. The rubidium and cesium fluorosulfatozirconates Rb₃Zr₂F₉SO₄ · 2H₂O, Cs₂ZrF₂(SO₄)₂ · 2H₂O, Cs₈Zr₄F₂(SO₄)₁₁ · 16H₂O, and Cs₂ZrF₄SO₄ offer the most efficient RL.     

The shape and stability of wall-bound and wall-edge-bound drops and bubbles

The behavior of wall-bound drops and bubbles is fundamental to many natural and industrial processes. Key characteristics of such capillary systems include interface shape and stability for a variety of gravity levels and orientations. Significant solutions are in hand for axisymmetric pendent drops for a variety of uniform boundary conditions along the contact line with gravity acting normal to a planar wall. The special case of a wall-bound drop or bubble that is also pinned at an edge (i.e. a ‘wall-edge-bound’ drop) is considered here where numerical solutions are obtained for interface shape and stability as functions of drop volume, contact angle, fluid properties, and uniform gravity vector. For a semi-infinite zero-thickness planar wall (plate), a critical contact angle is identified below which wall-edge-bound drops are always stable. The critical contact angle is computed as a function of the gravity vector. The numerical procedure, which makes no account for contact angle hysteresis, predicts that such wall-edge-bound drops are unconditionally unstable for any gravity field with a component that is tangent to the wall while inwardly normal to the edge. Select experiments are conducted that support the conclusions drawn from the numerical results.