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Plastic PP Strapping Band Production Line/PP Strap Extrusion Machine/PP Strapping Extruder Machine
The Production Way about our machine:
Firstly, the temperature control of the extruder is generally
between 250 ℃ and 280 ℃. The next step is cooling. The temperature
of the strip is very high after it leaves the machine head, so it
needs to enter the water for cooling immediately, because isotactic
polypropylene is easy to generate the brew crystal structure in the
case of rapid cooling, and the molecular structure of the brew
crystal is loose. Easy to stretch orientation to obtain
high-quality products. Then there is stretching, which aims to
improve the longitudinal strength of the packaging belt and reduce
the elongation. The stretching must be carried out in boiling
water, typically using a single stretch. Finally, there is
embossing. After stretching, the packaging belt passes through two
embossed rollers and is embossed with patterns. Its function is to
increase friction during use, without slipping, and to look
beautiful and generous from the outside.
Production Flow:
Materials feeding -- Extruder melt -- Filter -- Melt metering pumb
-- Extrusion die -- Hot water tank --Five Pulling rollers --
Stretching Oven -- Stretching rollers -- Embossing --Annealing
treatment oven and water tank -- Three Pulling Rollers -- Winders
-- Packing
Name | Strap Cavities | Motor | Screw Diameter | Screw L:D | Output | Screw Speed |
SJ65/30 | 1-2 Cavities | 30kw | 65mm | 30:1 | 100kg/h | 94RPM |
SJ75/30 | 2 Cavities | 45kw | 75mm | 30:1 | 180kg/h | 74RPM |
SJ90/30 | 4 Cavities | 75kw | 90mm | 30:1 | 250kg/h | 74RPM |