The core tip: plastic film and sheet processing plants use new processing technology to produce high-value-added daily-use consumer plastic products, while achieving higher product prices.
In general, new processing technologies are more economical than existing production processes. For example, at the K2004 exhibition, a certain type of processing system that was not successfully promoted in Japan was introduced to Europe to be promoted as a successful example. The marketing and product division of WEKOBiel, Switzerland, introduced that the coating system introduced by the company supplies a kind of ineffective road girl to the film manufacturer, that is, the coating of a single-layer film process instead of the co-extruded film, thereby throttling This material and reduce energy consumption.
In many environments, the use of co-extrusion for the production of plastic films with non-profile features is neither cost-effective nor necessary, as suggested by i. That new type of processing system utilizes multiple torsional sprayers to produce an average spray (anti-blocking agent, anti-fogging agent, antistatic agent) containing non-functional additives, and is coated in nanometer or micron order in tandem or offline. The layer thickness is sprayed. i said that the thickness of the coating is sufficient for most occasions.
After being rolled by a slippery roller and dried by hot air, the spray particles are further separated and coated on the base film. That type of film can be processed without the need for storage for a long time, and the cost is also reduced.
The number of plates on the torsion sprayer depends on the width to be coated. A cam-deflection with two-stage torsional speed can be stacked to ensure an even pattern of spray coating. The sprayed mist stream requires no viscosity coefficient of at most 200 mP. The deep-drawn sheet is prepared for thermoforming the film, or it may be coated with a coating film containing an unhelpful agent (such as an anti-adhesion agent for the inner layer and an anti-fogging agent for the inner layer). Reduce processing time.
The amount of coating liquid is very small (1 to 5 ml/m2), so the processing plant can significantly reduce the amount of additive consumption. Researchers at the Institute of Plastics Technology, Paderborn University, Germany, conducted tests at the Esde Extruder Manufacturing Company in Germany, using polyvinyl slip, polyester, polystyrene and poly-slurry by using slip agents, anti-fogging agents and antistatic agents. The results of wet coating of the ethylene base showed that the film could be coated without pre-treatment. There is no polyethylene film because it has no inert profile, and it is required to use corona treatment to spray the antistatic agent coating ineffectively.
i said that Japanese processors have found that the film-coating system has the advantages of no throttling cost at the latest, thus eliminating the need for internal and external functional film layers. In the same way, he said that German packager KlocknerPentaplast has not purchased two sets of WEKO production systems, and has not been removed from the factory in the Netherlands and North America. The presentation of the WEKO system gives a cost option for a processed product, that is, a five-layer coextruded film of 5 m thick is processed, and a film of three layers of 1 m thick functionalized spray layer is coated on a three-layer substrate for comparison. If we replace the two outer layers of the five-layer coextruded film (one layer with anti-fogging agent and one layer with slip agent), the processing plant may not change the film composition, but only change the co-extruded film layer. Count the film thickness by a few points. I suggest.
It is rumored that the company can save 524,000 euros per year through that type of production system. If the energy consumption required for co-extruded film production is added, the amount of throttling will reach 614,000 euros per year.
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Label: Adhesives Five-layer coextrusion Paderborn Thermoforming Functional additives
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