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Plastic bag making machine (view source)

Revision as of 02:01, 26 November 2009

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'''Plastic Bag Making Machines''' is used by the plastic converting industry to manufacture plastic film. Plastic converting is usually referred to the manufacturing process whereas plastic resins are processed to plastic packaging material like plastic bags, plastic geomembrane film, or flexible packaging. Extrusion is the first step of the plastic conversion, whereby the resins are processed to rolls of plastic film. One of the technologies used for plastic converting is the blown film extrusion.  
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'''Plastic Bag Making Machines''' are part of the [[plastic converting line]]s, which are used for manufacturing plastic packaging material from polythene resins. As the last unit of the converting line, bag machines process the printed and slitted plastic roll-film.  
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Blown film extruder is recognized by the wider public by it's several meter tall tower. The tower is the part of the equipment where the film blowing takes place. The resin is melted at the bottom of the equipment and than transformed to film. Then the film is led up through the tower. The main function of the tower is while the film is run through the tower from the bottom to the top, there is a controlled cooling airflow, air-blow applied to the film. The controlled cooling of the film is essential to produce consistent homogeneous quality.
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Plastic bag making machines produce bags that are either side sealed, or bottom sealed (sometimes referred to as bottom weld / bottom welded.) For both the bottom sealed bag and the side sealed bag, the main input material of the bag making process is two-layer roll-film. For the bottom sealed bag machines the input film is tubular shaped. On the other hand, for the side sealed bag machines, the input film is a single-layer roll film that is folded up to two layers by a v-shaped banding frame at the front end of the bag machine.  
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Blown film equipments can be categorized depending on the number of the layers of the film the given machine produces. Plastic film is commonly used for packaging and insulating goods that are sensitive to light, heat and other external factors. The properties of the plastic film can be greatly engineered by layering plastic films together, (this is what the co-extrusion term refers to) creating the so called barrier films. In some barrier film technologies plastic film is co-extruded with non-plastic material.
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There are three-side sealed plastic bags beyond the bottom- and side sealed bags. These bags have usually different properties from the later types and are manufactured by machines that have different process steps than the regular bag making machines. The machines producing three-side sealed bags are discussed in a separate article titled [[Plastic pouch bag making machine|Pouch bag machine]].
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There are three main technological process steps of the bag making machine. First one is the gusseting, as far as the corresponding bag has bottom or side gusset(s). The next step is the sealing or welding that is done by pressing certain points of the two-layer film to a heating unit as the film runs through the machine welding together the two layers of the film at the required points. The last process step is cutting up the-two layer film into the right size.
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Very important part of the whole technology is the process that controls the speed of the film running through the machine. The main process steps are repeated at an even pace, so the speed of the film needs to be very accurately controlled in order have the process steps applied at the required points and length of the film.
    
==Examples==
 
==Examples==
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* [http://www.peccanada.com/plastic-processing-equipment/extruders/monolayer-blown-film-line.html Mono-layer extruder equipment] for producing plastic film for food and agricultural packaging using mLLDPE, LLDPE, LDPE, and HDPE.
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*[http://www.peccanada.com/plastic-processing-equipment/bag-making-machines/bottom-sealing-dual-channel-bag-machine.html Bottom sealing bag making machine] for producing dual channel bags.
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*[http://www.peccanada.com/plastic-processing-equipment/extruders/three-layer-co-extrusion-blown-film-line.html Three-layer extruder equipment]
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*[http://www.peccanada.com/plastic-processing-equipment/bag-making-machines/self-sealing-zip-lock-fastener-bag-machine.html Side sealing poly bag making machine]: for the production zip lock fastener bags.
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*[http://www.peccanada.com/plastic-processing-equipment/extruders/multilayer-co-extrusion-blown-film-line.html five to nine -layer extruder equipment]: for the production of transparent symmetrical and unsymmetrical barrier film.
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* [http://www.peccanada.com/plastic-processing-equipment/bag-making-machines/drawstring-insert-bag-machine.html Side sealing plastic bag making machine] for the production of drawstring insert bags.
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*[http://www.peccanada.com/plastic-processing-equipment/extruders/multilayer-downward-water-cooling-co-extrusion-blown-film-line.html five to eight -layer downward facing extruder equipment]: for the production of symmetrical and unsymmetrical high mechanical strength transparent barrier film  used in food, farming, chemical, and medical packaging.
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*[http://www.peccanada.com/plastic-processing-equipment/bag-making-machines/flower-and-irregular-shaped-bag-machine.html Side-sealing poly bag making machine]: for the producing irregular shaped bags like flower bags..
    
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==Market info==
 
==Market info==
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One of the North American [http://www.peccanada.com/plastic-processing-equipment/extruders.html blown film extruder suppliers is Plastic Equipment Co.]
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One of the North American [http://www.peccanada.com/plastic-processing-equipment/bag-making-machines.html poly bag making machinery suppliers] is '''Plastic Equipment Co.'''
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See also [[Directory:PEC_-_Plastic_Equipment_Co._/_Blown_Film_Extruder_Lines| Blown Film Extruder Lines by Plastic Equipment Co.]] in MyWikiBiz.
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See also [[Directory:PEC_-_Plastic_Equipment_Co./Bag_Making_Machines| Plastic Bag Making Machines by Plastic Equipment Co.]] in '''MyWikiBiz'''.
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<ref>{{Cite book| url=http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2FPetroleum-Refining-Technology-Economics-Fifth%2Fdp%2F0849370388%2Fsr%3D8-3%2Fqid%3D1166735153%3Fie%3DUTF8%26s%3Dbooks&tag=omnimediaguid-20&linkCode=ur2&camp=1789&creative=9325| title=Petroleum Refining: Technology and Economics | publisher=Marcel Dekker| pages=19/488| format=hardcover| accessdate=2006-12-21}}</ref>
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Businesses related to Blown Film Extruders will identify themselves by the following 5-digit [[NAICS]] codes:
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Businesses related to Poly Bag Making Machines will identify themselves by the following 5-digit [[NAICS]] codes:
    
* '''[[NAICS_Code1:=33322]]''' - Plastic manufacturing equipment manufacturers
 
* '''[[NAICS_Code1:=33322]]''' - Plastic manufacturing equipment manufacturers
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[[Keyword:=blown film extruder]]
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[[Keyword:=plastic bag making machinery]]
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[[Keyword:=polythene film extruder]]
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[[Keyword:=poly bag machine]]
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[[Keyword:=multi-layer co-ex plastic film extruder]]
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[[Keyword:=side-sealing poly bag machinery]]
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[[Keyword:=plastic film extruder]]
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[[Keyword:=bottom-weld poly bag machinery]]
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[[Keyword:=barrier film manufacturing equipment]]
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[[Keyword:=zip-lock poly bag machine]]
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[[Keyword:=draw-sting poly bag making machine]]
 
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