Uses.
This unit is suitable for blowing high-density polyethylene (HDPE), low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) plastic films, which are widely used in the packaging of food, clothing, textiles, daily necessities and other civilian and industrial products. The raw materials can be formulated to produce pearlescent film and degradable film.
Features.
1、The die head is plated with hard inscription and its structure is spiral mandrel type, the extruded molten material is uniform and the blown film has good finish; the structure of air-cooling device is labyrinth type, the air output is uniform. The traction device adopts lifting type and can be adjusted according to different process requirements.

2、The winding device adopts pressure friction winding or center winding, and adopts torque motor to adjust, which makes the winding smooth and easy to change the winding.

Main technical parameters
Model：SJ-50
Screw diameter：Ф50mm
Screw length to diameter ratio: 28:1(L/D)
Screw speed：10-120rpm
Die specification：Ф50-Ф60
Product thickness：0.004-0.08mm
Product folding width: 200-600mm
Main motor power：7.5KW
Heating power: 12KW
Output: 20-30kg/h
Weight of the whole machine≈1.8t
Overall dimension (L×W×H): 6000×2000×3500mm

When producing undershirt bags, bag-making machine and punching machine are the necessary machinery. Usually can produce undershirt bags bag-making machine is divided into two kinds, heat sealing cold cutting bag-making machine and heat sealing hot cutting bag-making machine.