塑料啤酒瓶的开发、应用进展与前景

近年来 ,国外采用各种现代化改性手段提高PET瓶的气体阻透性 ,使之用于一次性啤酒容器。本文综述了新型阻透材料PEN用于可重复使用 /重复灌装啤酒瓶的研究开发、测试和推广应用方面取得的突破性进展。预测塑料啤酒瓶将迅速、稳步增长 ,但不会取代玻璃和金属容器     

PET塑料啤酒瓶的开发现状与前景展望

啤酒是世界上消费量最大的饮料之一,长期以来,玻璃瓶为啤酒的主要容器,但其抗冲性及耐压性较差,存在安全隐患,开发廉价而适用的替代品极具市场价值。PET塑料啤酒品作为新型的啤酒包装容器,其开发成为全球研究的热点。本文介绍了塑料啤酒品的存在价值,国内外开发现状,并对研究开发前景进行展望。     

塑料啤酒瓶前景看好

啤酒是全球范围较受欢迎的饮料之一。长期以来,绝大部分啤酒采用玻璃瓶包装。玻璃瓶具有阻气性好、盛装啤酒存放时间长、透明、易回收再用等优点,但生产中能耗大、瓶体重、易碰碎,有时还会发生爆炸伤人等事故。因此,目前国外正在大力研究开发塑料啤酒瓶,并成为一个已经启动并具有巨大发展潜力的市场。 　　目前开发的主要品种有聚对苯二钾酸乙二醇酯 (PET)瓶、聚对萘二钾酸乙二醇酯 (PEN)瓶、 PET涂层改性或多层复合瓶及 PET和 PEN共混瓶等。 PET瓶价较廉、不易碰碎,在软饮料方面已获广泛应用,但阻气性较差,盛装啤酒存放期…     

塑料啤酒开发与应用进展

概括世界各国的塑料啤瓶的研究开发与应用情况，并对我国的技术开发作了展望。     

日本开发出PAИ塑料啤酒瓶

日本扎幌啤酒、古野工业所和孟山都化成合作,开发出可回收再灌装的PAN塑料啤酒瓶。PAN是丙烯腈、苯乙烯共聚物,制作啤酒瓶时的配比是丙烯腈占70%,苯乙烯占30%。制成的啤酒瓶的特点是:气密性好,在环境温度23℃的大气压条件下,透气率为氧气每平方米0.4ml/d,二氧化碳每平方米1.2ml/d,其阻气性能优于PET;耐药性好,可用热碱水清洗,即使装过农药、油、香料污染性强的PAN塑料啤酒瓶,也可用热碱水洗净;对化学物质和臭味物质吸收量小,且有较高的耐热     

值得大力开发的产品--塑料啤酒瓶

随着社会的发展和我国改革的进一步深化,作为一个连续多年经济增长率保持在7%以上的发展中的大国,人们的生活发生了根本性的变化,生活习惯和理念已起了明显的变化.追求时尚、追求健康、追求卫生安全、以及环境保护意识越来越强,高质量、高品位的消费随处可见.而作为大众消费增长最快之一的物品啤酒的包装,尽管有广大的研制机构在研发以及广大人们的呼声要求有新的包装形式,但仍停留在原有的基础上,几乎无什么大的变化和改进.作为一种大众产品的包装,我国有能力开发新型的产品--塑料啤酒瓶.     

国内外应用冰蓄冷空调的广阔前景与发展趋势(续)

七、低温送风空调——冰蓄冷系统之星与灵魂 当代冰蓄冷系统与低温送风空调紧密结合在一起,被誉为蓄冷技术凤冠上的一颗明珠,更显示出了冰蓄冷技术的优越性与竞争力,被称为暖通空调工程中继变风量空调系统之后最重大的变革。     

塑料(加工)工程的进展

本文就塑料成型加工领域内近年来的主要发展情况作了较为详细的介绍,重点在塑料的共混、增强改性及塑料的混合工艺,挤出成型和注射成型三个方面。     

我国汽车用工程塑料的现状、前景与开发应用进展

我国汽车用工程塑料的现状、前景与开发应用进展黄嘉（北京市化工研究院）汽车工业历来是工程塑料的主要应用市场之一。本文概述了国内外汽车用工程塑料的现状，尝试对本世纪末或下世纪初我国车用工程塑料的发展前景进行初步的预测，并简要介绍了北京市化工研究院车用工程...     

纳米PVC的开发与应用进展(上)

全文介绍了纳米PVC的性能,生产的主要技术路线与最佳的操作条件及有关进展情况。对现工业化运行的主要纳米PVC生产工艺的技术特点进行了具体的分析和总结,阐述了国内外研究开发的现状与发展趋势。并探讨了扩大应用范围等的前景与市场需求。     

浅谈啤酒瓶存在的问题和改进前景

进入旅游旺季以来,餐饮业生意火爆,啤酒产销也随之供不应求。然而在人们购销啤酒时都会关心会不会发生啤酒瓶爆炸伤人事件。前不久,各种媒体也先后报道了啤酒瓶由于质量问题伤害消费者的事件。笔者近日从有关部门得悉:1999～2001年仅浙江省各级消协调解处理的啤酒瓶爆炸而引起的投诉案已达到903起,其中,造成伤人     

Using waste plastic bottles as additive for stone mastic asphalt

Currently, polymer modified asphalt mixture is a relatively costly mixture for paving roads. One way to reduce the cost of such constructions and rendering them more convenient is by using inexpensive polymers, i.e. waste polymers. The main purpose of this research is to determine the effect of incorporating waste plastic bottles (Polyethylene Terephthalate (PET)) on the engineering properties of stone mastic asphalt (SMA) mixture. The volumetric and mechanical properties of asphalt mixes that include various percentages of PET (0%, 2%, 4%, 6%, 8% and 10%) were calculated and assessed with laboratory tests. The appropriate amount of PET was found to be 6% by weight of bitumen. The outcomes were statistically analysed and the determination of the significance at certain confidence limits was performed with the two factor variance analysis (ANOVA). Moreover, some studies conducted on polyethylene modified asphalt mixture have also been taken into consideration in this paper. The results show that the addition of PET has a significant positive effect on the properties of SMA and it can promote the re-use of waste material in industry in an environmentally friendly and economical way.     

Development of plastic bottles resistant to lateral deformation

Plastic bottles are sensitive to lateral wall deformation (panelling) owing to the pressure difference between the inside and the outside. Parameters involved in plastic bottle deformation have been reviewed. A quick laboratory test for measuring bottle resistance to deformation was set up and evaluated vs. real life conditions. Round 1–l bottles with various geometries and wall thickness distributions were designed, produced and tested.     

Lateral deformation of plastic bottles: experiments,simulations and prevention

Mass reduction of plastic bottles containing non-carbonated liquids calls for advanced design approaches. Weight reduction of bottles consequently influences the mechanical performance of the bottle. This performance involves top load, vacuum and impact resistance. The present paper studies the lateral deformation of a bottle due to an internal vacuum. Similar studies have been carried out before, but until now the allowable deformation has never been related to the initial headspace of the bottle. If a bottle design is able to compensate for a potential vacuum in an aesthetic manner, then panelling will not occur. Changing the vacuum resistance of a bottle will result in a different top load. Current computational techniques enhance our understanding of the problem and provide tools to achieve solutions to it. © 1998 John Wiley & Sons, Ltd.     

Effect of waste plastic bottles on the stiffness and fatigue properties of modified asphalt mixes

Nowadays, the use of recycled waste materials as modifier additives in asphalt mixes could have several economic and environmental benefits. The main purpose of this research was to investigate the effect of waste plastic bottles (Polyethylene Terephthalate (PET)) on the stiffness and specially fatigue properties of asphalt mixes at two different temperatures of 5 and 20 °C. Likewise, the effect of PET was compared to styrene butadiene styrene (SBS) which is a conventional polymer additive which has been vastly used to modify asphalt mixes. Different PET contents (2–10% by weight of bitumen) were added directly to mixture as the method of dry process. Then the resilient modulus and fatigue tests were performed on cylindrical specimens with indirect tensile loading procedure. Overall, the mix stiffness reduced by increasing the PET content. Although stiffness of asphalt mix initially increased by adding lower amount of PET. Based on the results of resilient modulus test, the stiffness of PET modified mix was acceptable and warranted the proper deformation characteristics of these mixes at heavy loading conditions. At both temperatures, PET improved the fatigue behavior of studied mixes. PET modified mixes revealed comparable stiffness and fatigue behavior to SBS at 20 °C. However, at 5 °C the fatigue life of SBS modified mixes was to some extent higher than that of PET modified ones especially at higher strain levels of 200 microstrain.     

Proposed method to test the relative seal strength of plastic bottles and its use in optimizing sealing parameters

A test method for measuring the strength of the seal on a flexible bottle is proposed. The method measures seal strength as the compression force applied to the side of the bottle required to make the seal fail. The technique has the advantage of using standard equipment and reproduced failure conditions as closely as possible. The method was used to compare the seal strengths of a foil laminate heat-seal on a retortable gamma bottle under various sealing conditions. The results for various sealing pressures, temperatures and times are reported and optimum conditions are identified.     

无人水下航行器的现状与发展趋势

无人水下航行器是当前海军装备发展的热点,其分为非自主式（ROV）和自主式（AUV）2类,本文分别介绍了ROV和AUV的分类与发展特点,比较了ROV与AUV的优势与劣势。     

我国塑料热稳定剂生产现状与发展趋势

本文介绍了国内塑料热稳定剂生产现状、发展方向及与国外先进水平存在的差距。