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| 简介： 商用的塑料加工设备需要快速、高效以及廉价的清机手段，特别是在其加工一系列的聚乙烯产品的时候，这些聚乙烯的熔融指数、密度或者颜色的差别非常大。 UNIPURGE™ DFDB-0964 Natural 7 是一种粒料化的聚乙烯基清机料，它具有优异的清洗特性，气味小。UNIPURGE DFDB-0964 Natural 7 为快速、经济地清理诸如挤出机和注塑机等塑料加工设备提供了一种实用的解决方案。在正常使用该产品时，您可以将清机停机时间降低至最低，加快品种转换之间的过渡。UNIPURGE DFDB-0964 Natural 7 可以应用于薄膜挤出设备、异型材挤出、电线涂覆、注塑模塑和共混线。在过去的20多年时间里，UNIPURGE 清机料已经成为业界的主力军，首次解决了快速、经济地清理挤出机的老问题。UNIPURGE DFDB-0964 Natural 7 具有优异的清洗功能，可以高效地清理机器设备。 该产品是如何工作的? 将几种清理剂加入聚乙烯基的产品，制得一种具有优异的清洗性能和清除功能的化合物。DFDB-0964 Natural 7 清机料用于在用电较小的情况下进行挤出。这种清机料特别适宜于在需要停机一段时间时用于挤出机的清机。这种清机料的刚性可以清除比较坚硬的聚乙烯牌号产品，使其与较软牌号的产品一同被冲洗出来。 为什么要清机? 恰在设备拆卸清理之前使用DFDB-0964 Natural 7 清机料可以显著地减短清理停机时间。该清机料可以有效地清除挤出机料桶和机头处降解的聚乙烯。由于在挤出机关闭干燥时，挤出机内尚有最小量的DFDB-0964 Natural 7 清机料，这样就方便了取出挤出机螺杆。可以容易地将DFDB-0964 Natural 7 清机料从机头、连接件和机头模穴中清除。由于可以减少因为清理而停机的频次和停机时间，因此定期地使用DFDB-0964 Natural 7 清机料进行清机是一种很好的预防性维护措施。同理，DFDB-0964 Natural 7清机料的高效清机能力可以在从一种低熔融指数材料转换为一种高熔融指数材料以及转换颜色的时候，显著地减少废料。 类似例子举不胜举，它们说明减短设备停机时间和/或减少废料量完全可以抵消DFDB-0964 Natural 7 清机料适中的价格成本。 何时使用： 除了此前描述的几种情形，建议在以下情况下使用 UNIPURGE： 1. 机头的筛网出现过度磨损(处方：使用清机料，无需改变加工条件，然后再使用标准的物料) 2. 从较大的厚度转换到较小的厚度（等于或者小于0.75 mil (19 microns)）时， (在减低厚度之前清机) 3. 恰在停机之前清机。 (在停机期间，DFDB-0964 Natural 7 清机料会留在挤出机里以保护内部零件，可以在开机的时候使用标准材料将其快速清出。) 如何使用： 为了达成满意的清理效果，DFDB-0964 Natural 7 清机料的使用量应视污染的程度和设备的规格而定。在UNIPURGE的正常使用情况下，第一次清机的效果越好，在后续的清理操作中所需要的清机料就越少。 例如，使用了很长一段时间的挤出机和机头会积累大量的降解树脂。在这种情况下，当进行清机操作时，建议先拿掉网叠，以防止严重的阻塞或对造成机头断裂。网叠后面的挤出机压力的增高意味着堵塞，在这种情况下，建议考虑更换网叠。一旦连续、定期地使用了 DFDB-0964 Natural 7 清机料一般就不再需要在清机操作时或者清机操作完成之后移去网叠了。 建议使用的加工温度上限为250°C。应该避免在超过建议的加工上限温度的情况下长时间地使用，因为这样会产生废气或者造成树脂降解。不开动机器，将产品放置在闲置加热的机器中也是需要避免的，建议将机器总是处于螺杆开动的状态。 DFDB-0964 Natural 7 清机料可被用于清理所有的标准聚乙烯挤出物料。一般情况下，无需更改设备的物料温度设置。但是，为了达成更有效的清机效果，建议使用中性螺杆，而且反复地降低和升高螺杆转速，并相应地调整收卷或者引出装置的速度以避免断料。如果遇到螺杆过度打滑的情况，可以使用原色聚乙烯树脂与DFDB-0964 Natural 7 按照50:50的比例进行稀释，这样就可以使DFDB-0964 Natural 7 发挥全效。可以随后使用标准材料轻易地将DFDB-0964 Natural 7 冲洗出来。在这个步骤之中将原色树脂与DFDB-0964 Natural 7一同使用降低了螺杆打滑的可能性，以一般性的成本代价实现了快速清理。 本产品对于美国食品和药物管理局法规的合规性： DFDB-0964 Natural 7中的聚乙烯树脂符合食品添加剂法规21 CFR 177.1520 中有关烯烃聚合物par (c) 2.1部分的要求。该产品中的添加剂受相应的食品添加剂法规的管制。 DFDB-0964 Natural 7的用途是作为清理挤出机的一种清机料。DFDB-0964 Natural 7 不用于食品包装材料。这种清机料满足美国食品和药物管理局有关接触食品的聚烯烃材料的法规要求，使其更宜于作为一种清机料应用于食品包装制造和其他接触食品的物品的加工过程。从法律角度来讲，DFDB-0964 Natural 7 不能用于制造那些在烹调过程中盛装食物的器具。 Introduction Commercial plastic processing equipment requires fast, effective, and inexpensive means of purging, particularly when processing a series of polyethylene compounds that vary widely in melt index, density, or in color. UNIPURGE™ DFDB-0964 Natural 7 is a pelletized polyethylene-based purge compound with excellent scrubbing characteristics and low odor. UNIPURGE DFDB-0964 Natural 7 provides a practical method of rapidly and economically cleaning plastic processing equipment, such as extruders and injection molders. When used on a regular basis, you can minimize downtime for cleanups and in facilitating transition from one resin to another. UNIPURGE DFDB-0964 Natural 7 can be utilized in film extrusion equipment, profile extrusion, wire coating, injection molding and compounding lines. UNIPURGE purge compounds have been the industry workhorse for over twenty years and have provided the first practical method of rapidly and economically cleaning extruders. UNIPURGE DFDB-0964 Natural 7 has been found to provide exceptional scouring activity, thus yielding efficient cleaning of the equipment. How Does It Work? Several cleaning agents have been incorporated in a polyethylene-based composition to produce a compound with excellent scrubbing and scavenging properties. DFDB-0964 Natural 7 purge compound is designed to extrude with low power requirements. This compound is highly suitable for introduction into extruders and dies when a shutdown period is required. The compound has the rigidity needed to purge out stiff grade polyethylenes, yet can be flushed out in turn by soft grades. Why Use Purge? The use of DFDB-0964 Natural 7 purge compound just prior to equipment dismantling can reduce cleanup downtime significantly. The compound effectively removes degraded polyethylene from the extruder barrel and die. Because a minimum amount of DFDB-0964 Natural 7 remains in the extruder when the extruder is run dry, the ease of extruder screw removal is increased. DFDB-0964 Natural 7 will also strip easily from the die, adapter, and head cavities. Periodic cleaning with DFDB-0964 Natural 7 purge compound is good preventive maintenance, because it decreases both the frequency and duration of shutdowns needed for cleanup. Similarly, the purging efficiency of DFDB-0964 Natural 7 purge compound dramatically reduces the amount of scrap generated when changing from a lower melt index material to a higher melt index material or from one color to another. These examples are just a few of the many instances in which the moderate cost of DFDB-0964 Natural 7 purge compound is more than offset by reduced equipment downtime and/or reduced scrap. When To Use In addition to the conditions described previously, the use of UNIPURGE is advisable in the following circumstances: 1. Excessive web tears at the die. (To remedy: introduce purge compound, do not change conditions, and return to the standard compound.) 2. Shifting production from thicker to thinner gauges of 0.75 mil (19 microns) and under. (Purge before reducing the gauge.) 3. Immediately before shutdown. (DFDB-0964 Natural 7 purging compound remains in extruder during shutdown period to protect interior, and is rapidly flushed out by standard compound on startup.) How To Use The amount of DFDB-0964 Natural 7 purge compound required to do a satisfactory cleaning job varies with the degree of contamination and the equipment size. When UNIPURGE is used on a regular basis, the equipment reaches a higher state of cleanliness, and less purge compound is required in succeeding cleaning operations. For example, an extruder and die that have been in constant use over a long period will have accumulated a considerable amount of degraded resin. In this instance, it would be advisable to remove the screen pack to prevent severe plugging and possible head rupture while purging. An increase in extruder pressure behind the screen pack is an indication of clogging, and, under such circumstances, a screen pack change is considered advisable. Once DFDB-0964 Natural 7 purging compound has been used on a continuing periodic basis, the screen pack will not normally need to be removed during or after the purging operation. The recommended upper processing temperature limit is 250°C. Prolonged exposure to temperatures in excess of the recommended upper processing temperature should be avoided in order to prevent off-gasing or resin degradation. Allowing product to sit in an idle heated extruder should also be avoided. It is recommended that the extruder screw be turning at all times. DFDB-0964 Natural 7 purging compound may be used to purge any standard polyethylene extrusion compound. Normally, it is not necessary to change the compound temperature on the equipment. For more effective cleaning, however, it is advisable to use a neutral screw and to vary screw speed repeatedly from high to low and back to high. Winding or take-off equipment speed should be adjusted correspondingly to prevent breakage. If excessive slippage in the screw is encountered, DFDB-0964 Natural 7 can be diluted 50:50 with natural polyethylene resin, and then by DFDB-0964 Natural 7 full-strength. DFDB-0964 Natural 7 can then be flushed out simply by introducing the desired standard compound. The use of natural resin with DFDB-0964 Natural 7 in this procedure minimizes the chance of slippage in the screw and provides rapid cleaning at a nominal cost. FDA Status The resin content of polyethylene DFDB-0964 Natural 7 complies with Food Additive Regulation21 CFR 177.1520 for Olefin Polymers par (c) 2.1. The additives present are sanctioned by appropriate Food Additive regulations. The intended use for DFDB-0964 Natural 7 is as a purge compound for cleaning extruders. DFDB-0964 Natural 7 is not intended for food packaging use. This purge compound meets the FDA requirements for polyolefins intended for food contact applications to facilitate its use as a purge compound in facilities manufacturing food packaging and other food contact articles. DFDB-0964 Natural 7 cannot be used legally for holding food during cooking. |
产品描述 Product Description
用途：电线电缆应用;清洗复合物;
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2015-12-08 随着一家德国初创企业和美国模具生产商和零件供应商重新开始生产新的乙烯基唱片压印机，黑胶唱片的生产能力在约30年来首次呈现增长。 生产的第一批乙烯基唱片压印机中有8台将被送到美国底特律，在这座陷入困境的制造业重镇里，它们将为受到音乐产业热爱的黑胶唱片的复兴做出贡献。 |
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