Bruckner's BOPET Film Extrusion Line

In technology research and development, Markus Gschwandtner also revealed that the company has developed an engineering program to improve the quality of the film and extend the normal operating time of the production line. To improve the quality of the output film, they developed "Direct Drive" and "Pull Control Systems," which were numerically controlled and wound up to protect the film surface from damage when it was running a machine orientation (MDO) program. As the equipment shutdown due to the difference in pulling force can be effectively reduced, the uptime of the equipment can also be extended. The company also developed a "production management system" (MMS) to control "direct drive" to manage and optimize production, enhance the effectiveness of slitting processes, reduce waste, and increase film transparency. In market applications, Karlheinz Weinmann, marketing communications manager, believes that in addition to the general packaged film and co-extruded packaging film, the market demand for the following applications is increasing: ultra-thin laminated film (18μm and below); multilayer structure film (For example, 5 layers) to supply labels and paper film application market; PP/PS/PET shrink film to supply shrink labels or other shrinkage applications; Professional BOPET film to make hybrid motors in capacitor supply cars; or thick film (200μm ) To supply LCD LCD market. She added: “At the Chinaplas, we signed the largest order of the company with Jiangsu Shuangliang Company, which is to provide four BOPP production lines for Jiangsu Shuangliang.” Composite co-extrusion

Wood-plastic composite (WPC) processing technology is widely used in the North American market, but its history in Europe and Asia is relatively short. In WPC processing technology, Reifenhäuser announced its latest R&D results.

According to Hubert Graef, General Manager of Reifenhauser Suzhou Plant, and Zhuang Youdong, General Manager of China Sales, China Trading Division, Jebsen & Partners, the company recently demonstrated “WPC – Kovalex engineering” with the German company Kosche at the Ligna exhibition in Hannover, Germany. Complex co-extrusion solutions, where Reiffenhauser offers a twin-screw extruder “Bitruder” developed specifically for the co-extrusion of wood and fiber materials.

The "Bitruder" screw diameter is 75mm-133mm and the output rate is 120-650kg/h. According to reports, this machine has excellent plasticization and homogenization performance, and also has excellent cost performance. The most important is that "Bitruder" uses a gearless extrusion process based on REItorque technology.

For the overall extrusion application market, they believe that 5 or even 7-layer blown film technology has become a basic requirement for some high quality packaging materials. They pointed out that in addition to the general CPP application, the future trend is to make the structure of the film more multilayered to enhance the barrier properties, thereby prolonging the storage life of the food. In packaging applications, molding-filling-sealing (FFS) devices are the trend, and large-capacity food and beverage packaging will also develop in this direction.

Speaking of the market development of shrink/stretch films, Hubert Graef said: “The shrink/stretch film is very important to protect the goods on the pallet. Because shrink/stretch film brings more freedom and convenience for logistics transportation, we It is expected that this trend will be gradually strengthened in the next few years. At present, the application of shrink/stretch film in China's transportation sector still lags behind, which also means that this market has a lot of room for development." But the application of BOPP and CPP On the other hand, he believes that due to the excessive investment in the market over the past few years, the supply of the current market is oversupplied.

In terms of market competition, Zhuang Youdong believes that the Chinese market is highly competitive: “The profit margin of domestic film suppliers, especially general film, is already very small, and because of this, our strategy is to focus on the production and sales of high-quality film extrusion equipment to produce higher quality or Special-purpose film to open up market space."

They are particularly optimistic about China's packaging market, and are expected to continue to grow at a double-digit pace in the next few years; the building materials market is booming, supply and demand are booming; the thermoforming and sheet market will grow steadily; and the agricultural film market has also steadily increased over the past 15 years. The future will be dominated by high quality and special agricultural films.

Hubert Graef also specifically mentioned the fiber extrusion technology: "The fiber extrusion technology has been widely used in other fields in addition to its wide application in the building materials field. One of the advantages of this technology is its ability to replace wood; in fact, if Domestic building materials suppliers can maintain the quality of wood-plastic composite materials before the high-grade wood-plastic composite materials are introduced into the domestic market so as not to affect the image of wood-plastic composite materials. The market potential is very considerable.

Dr. Collin has accumulated considerable experience in the field of multi-layer co-extrusion technology. During the exhibition, he introduced the company's new technologies in the pharmaceutical field: "Extrusion lines for medical catheters" and "Water-cooled blown film production lines."

Specifically, the "extrusion line for medical catheters" has the following characteristics: the diameter of the extrusion catheter can be as small as 0.5-5mm; the wall of the tube is as thin as 0.07-0.5mm; the dimensional tolerance is low; the number of layers is 1-3 layers; Up to 100 meters per minute; replacement period is short; the production line is designed according to the dust-free standard; the central control system can directly complete the collection, recording and confirmation of relevant parameters. The entire production line includes extruder, melt pump, die, true air conditioning school and cooling, diameter control, traction, winding, cutting, preheating system, process control system and so on. The diameter of the extruder can be 16, 20, 25, 30, 45mm, and the extrusion range is very wide (0.05-40 kg/h). Through the precise control of feeding speed and temperature, the stability of the product quality and the continuity of production can be guaranteed; through the special design of the feeding device, it can be used for polymer processing of different shapes.

In addition, the "water-cooled blown film production line" is Dr. Collin's latest medical multi-layer film production line (3/5/7 co-extruded film production line) for the production of large infusion bags and secondary packaging materials.

In the field of large infusion bags and secondary packaging, PE, PP, PA and other applicable materials have gradually replaced PVC. However, a single-layer polyolefin film does not completely replace PVC in performance, so a 3, 5 or even 7-layer multi-layer co-extrusion system is required to solve this particular problem. Dr. Collin's production system can be used to produce multi-layer coextruded films.

When the coextruded film thickness ranges between 170 and 300 μm, the water-cooled down-blowing method is the most effective and can guarantee higher and more accurate product quality. When several extruders of the same type are fed into the co-extrusion die at the same time, the bubble is guided through the die into the water cooling ring, and then pressed flat and dried by the herringbone; if necessary, the dimension calibration procedure is entered; Then trim and rewind.

This method of operation has the following advantages: in the production process, from the film to the bag, the bag is kept highly clean; the vibration of the water-cooled PP composite improves the transparency of the PP composite; the isotropic properties of the film are balanced; suitable materials can be applied for different structural layers. Twin screw extruder

Leistritz company specializes in the development, production and sales of plastics processing and laboratory/medical extrusion equipment. At the show, the company introduced its ZSE series twin-screw extruder to the Chinese market. ZSE models use a combination of screw and barrel structure, the maximum speed of the screw up to 1,200 rpm. In addition, the company also introduced the ZSE MAXX series (with optimal volume and torque ratio), while the ZSE FLEXX series combines the advantages of the MAXX series with the process quick-change system.

The company's latest development in extrusion technology, the new shaft element adapter named “maXXshaft,” is said to increase extruder performance at an optimized volume/torque ratio. According to Gunther Rduch, executive director of Leistritz, this patented technology has been carefully designed in terms of transmittable torque and groove depth, with a conservative estimate of efficiency improvement of 25-35%. The ZSE MAXX and ZSE FLEXX series apply this patented technology. Customers can customize this series of products according to special needs.

Another German twin-screw extrusion equipment supplier, Berstorff, introduced the company's new ZE-type twin-screw extrusion series at the show. According to Bettina Wagner, executive/marketing manager of Berstorff, since the components of the ZE series are highly standardized, this series of equipment has an excellent price/performance ratio and is particularly suitable for general-purpose compounding applications.

Taking ZE Basic as an example, its various screw components complement each other in processability, and is particularly suitable for general-purpose compounding applications. These uses include: alloying; enhanced modification; filled modification; blending of polyolefins or engineering plastics with natural fibers; This model has six screw diameter specifications (26-77 mm) and standard screw speeds of 600, 900, and 1200 rpm. The output rate depends on the specific application, the size of the machine and the screw speed, generally between 3-2,800 kg/h. Like the ZE UTX series, the ZE Basic model is also equipped with a second-generation enhanced BPC control system. Extrusion Blow Molding

Kautex's KCC series of extrusion blow molding machines includes KCC10, KCC20 and KCC30 single station equipment, and KCC10-D and KCC20-D duplex machines with up to 10 chambers. KCC blow molding machines can produce plastic containers from 5ml to 30 litres; can be equipped with single-chamber, double-chamber or multi-cavity blanks for the production of single, double, triple or four-layer coextrusions; this series The uniqueness of the equipment is that it can also be equipped with a liquid level line device and a process of up-and-down blowing and on-line fluorination. All machines are equipped with advanced control systems and are manufactured to a high standard to ensure that the machines operate stably and reliably.

KCC10D is a double station extrusion blow molding machine with a clamping force of 10 tons. It is equipped with HKS2/50-CD125 4-cavity blank head and 4 main extruders with a length of 25D. This device can produce a circular 4-layer plastic bottle with a capacity of 1,000ml, suitable for packaging in the food, medicine, beverage, cosmetics, agriculture, printing and chemical industries. Produce plastic bottles with EVOH or PA barrier layer, with anti-oxidant, anti-vapor and other properties. At the exhibition, the company demonstrated on-site a one liter bottle weighing 75-90g, with an output rate of 720 bottles/hour.

Foaming board extrusion

The most commonly used material for the production of foamed panels is PS, and its polyolefins (such as LDPE), PET, and PVC. Foamed boards have good mechanical properties and insulation properties and are widely used in the fields of insulation, food packaging, fragile packaging, cushioning components, and exterior boards. More than 10 years ago, CFCs were generally used as blowing agents, but nowadays the most commonly used are butane, pentane or CO2; or additives are added at the time of board extrusion.

There are three basic processes for the production of general foamed boards, including the addition of a chemical blowing agent and the injection of a blowing agent in the form of a gas on a single extruder/double extruder. Gneuss is specialized in producing the melt filtration system required for the molding of such foamed sheet to remove soft and hard particles; maintaining even pressure to ensure that the honeycomb structure of the foamed sheet is uniform, etc.; Foaming during webbing; and preventing gas leakage during extrusion.

According to Gneuss company Andrew Prangnell, the melt filtration system has been successful in the field of foamed panels. The main reason for this is that the process technology and pressure are stable during the process, which results in a stable and consistent quality product. He stated that its filtration system has a high level of automation, and that there is no problem even with recycled materials with high levels of impurities. He stated that the advantages of the system lie in economy and safety: “Plastic foams use more gas blowing agents, and our products can effectively prevent gas leakage; in a fully controlled situation, the right amount of gas is injected evenly.”

Gneuss' filtration system models include RSFgenius, SFXmagnus, SF and KSF. Andrew Prangnel suggested that the press manufacturer should select the appropriate model according to the desired function of the product; and all of the company's filters can basically produce stable foamed products, reduce the thickness tolerance to reduce waste, avoid the impact of the screen change process, and more. Heavy use of back feeds and safer changeover procedures.

Multi-wall sheet extrusion

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