Extrusion Asia Edition 1-2020

次由考特斯和原材料厂商合作研发的技术使通过吹塑工艺生 产工业应用规格的氢气内胆成为可能。 “目前能够生产的内胆尺寸对我们而言只是开始。我们有 信心，未来利用这种新工艺还能生产出更大的氢气压力容 器。”Abdellah El Bouchfrati 先生说。 考特斯机械制造有限公司研发的用于生产大容量氢气瓶 内胆的技术，意味着为运输需求和基础建设需求提供经济有 效的解决方案变得触手可及。专家一直认为，仅仅依靠电池 技术的发展来解决未来的出行问题不足以长远实现“碳中和”的 目标。 乘用车领域的燃料电池技术目前由于生产成本高和基础 设施缺乏，尚无经济可行性，而氢气驱动系统和生产技术已 在其他领域成功应用。目前，这项技术在重型载货运输业、 地方公共交通运输业、造船业和航空业引发了特别关注。对 上述行业而言，最基本的要求是安全、轻便和密封的容器系 统。 CPV 这类容器不仅重量明显轻于钢罐，而且完全耐腐 蚀。 氢气是一流的储能介质，由可再生能源生产的氢气尤其 表现突出。同样的，能够承受相应压力，且安全存储极轻气 体的容器系统也是必须的。 除了为包装和汽车产品设计的高科技机器外，考特斯机 械制造研发热塑性塑料压力罐的生产设备，服务包括研发和 生产样品和小批量产品以及打造完整的复合压力罐生产线 。 考特斯与客户和材料制造商合作，坚持不懈地致力于发展 CPV 技术，目前首次推出的氢气瓶内胆正是合作的最新成 果。 H ydrogen presents considerable challenges in relation to the liner material’s permeability. Being the smallest molecule in the periodic table, hydrogen can diffuse through virtually every plastic material. Special polyamides (PAs) have the best barrier properties. However, due to their low melt rigidity and com- plexity, they have previously been difficult to process on this scale by blow molding. Newly developed polyamides and a spe- cial extrusion technique have now made this possible. “Producing a liner of this size from polyamide has been a major challenge. The work we are doing here is truly pioneering”, said Abdellah El Bouchfrati, Head of Kautex’s Composite Business Development, where the new hydrogen liner was developed. For some time now, Kautex has been putting its efforts into on- going development of composite pressure vessels (CPV) for va- rious applications such as hydrogen, CNG and LPG tanks. Com- posite tanks consist of a thermoplastic liner, a boss part, to which the valve is connected, and a fiber winding which adds mechani- cal strength. The internal liner is produced by blow molding. CPV high-pressure containers for hydrogen are generally de- signed for an operating pressure of 700 bar and a burst pres- sure of 1750 bar. The liner is a core component of the con- tainer. It is the inner skin of the tank. It absorbs the gas, sur- rounding the contents and sealing them off from the outside. The liner is subjected to high mechanical stresses and tempera- ture ranges from -60 °C to +120 °C. Now, for the first time, the method developed by Kautex in cooperation with a plastics ma- nufacturer enables hydrogen liners in sizes with industrial appli- cations to be produced by blow molding. “The liner size we have now achieved is just the start. We are confident that, in future, we will also be able to use this method to produce considerably larger liners for hydrogen pressure vessels”, said Abdellah El Bouchfrati. The technology develop- ed by Kautex Maschinen- bau for producing large- volume liners for hydro- gen containers means that a cost-effective solu- tion for transport and in- frastructure requirements is now within reach. Ex- perts have long conside- red sole reliance on bat- tery technologies to pro- vide a solution to tomor- row's mobility problems Kautex KBS241 挤出吹塑机 Kautex KBS241 extrusion blow molding machine 52 吹塑 Extrusion Asia Edition 1/2020