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Food Blister Packaging Forming Method
Sep 26, 2017

Food Blister Packaging Forming method

Blister tray is usually:  vacuum plastic molding; injection molding; blow molding; extrusion molding method. According to different blister packaging products to choose the appropriate molding methods.

A, vacuum plastic molding method: the molding method of the production of plastic tray is divided into single-sided and double-sided type. Single-sided plastic tray is widely used in electrical, electronic products and other packaging, and to the main private. Double-sided plastic tray are assembled, divided into two forms: the upper half of the extrusion for the fixed length, the width of plastic sheet, the lower half of the large vacuum plastic products.

B, extrusion molding Blister way: The molding method of the production of plastic pallets are assembled. That is, the extruder, the head and other equipment, respectively, as the upper and lower panels for the connection and support as a support with the wing of the I-shaped connecting plate, and then assembled. In the four molding methods, the method of production equipment, mold investment at least, the lowest cost, the best cost performance.

C, injection molding: injection molding method of the production of plastic tray products smooth, smooth, dense, product design freedom, divided into double-sided type of plastic tray and double-sided assembly-type plastic tray. Double-sided integral plastic tray general product weight in 15 kg / block or more, the shape is more complex, requiring clamping force of more than 2,500 tons of injection molding machine production. Double-sided assembly-type plastic tray is the double-sided type of plastic tray is divided into two pieces, respectively, after injection molding and then assembled. General plastic processing plants are able to do. So this form of plastic production may become the mainstream of plastic tray production.

D, extrusion hollow blow molding method: the extrusion of plastic tray - hollow blow molding and general hollow blow molding method is similar to its larger, and double-sided type, the need for a larger squeeze Machine, mold and die. General blow molding plastic tray life can reach 5 to 10 years, at the same time in the -40 ~ 40 ℃ environment stable work. The dynamic load of its products can reach more than 3t, bending strength have reached a higher level. Is the need for long life, high strength use of the preferred plastic tray. Blister sheet is called hard film or film, thickness greater than 2mm called plate, commonly used are: PET (polyethylene terephthalate) hard film, PVC (polyvinyl chloride) hard film, PS (polystyrene Ethylene) hard, ABS (engineering plastic). PS hard chip low density, poor toughness, easy to burn, burning will produce styrene gas (a harmful gas), it is generally used to produce a variety of industrial plastic tray. PVC hard film toughness is moderate, not easy to burn, burning will produce chlorine, the environment caused a certain impact, PVC easy heat, can be used sealing machine and high frequency machine edge, is the production of transparent plastic products, the main raw material.

PET hard film toughness, transparency, easy to burn, do not produce harmful gases when burning, are environmentally friendly materials, but the price is high, suitable for high-end plastic products, European and American blister blister generally require the use of PET hard film, but In order to solve this problem, people in the PET surface composite layer of PVC film, named PETG hard film, but the price is higher. Thick materials used by the main plate are: ABS, acrylic (plexiglass), PS, PC, PVC and so on.