The production principle of PP spunbond non-woven fabric

In recent years, my country's non-woven fabric processing industry has developed rapidly. Spunbond non-woven fabrics are used more and more widely, and their demand is also showing a trend of rapid growth.
1. General parameters:
Output: 1500～3000 t/a
Power consumption: 800 kw/t
Product quantitative: 10～230 g/m2
CV value: ≤5%
Aspect strength ratio: 1.5:1～1:1
Defects on the cloth surface: The cloth surface is in good condition, and there is basically no wire hanging or broken wire.

2. Equipment production process:

(1) The automatic suction device sucks PP slices from the low-level storage bin into the high-level storage bin.
(2) The PP raw materials and the masterbatch enter the main screw extruder together, and the electric heating device outside the main screw heats and melts the slices.
(3) The melt is filtered by the filter and output by the metering pump.
(4) The melt is ejected from the spinneret.
(5) The circulating cooling air draws the tow and sends it to the netting curtain.
(6) Consolidate the laid fiber net.

3. Introduction to some components

(1) Low-level storage bin: 3-4m3 (capacity), made of stainless steel.
(2) Suction tube: inner diameter 40mm, inner wall with metal support frame.
(3) High-position silo: 0.6m3 (capacity), made of stainless steel.
(4) Automatic suction device: 220~400 kg/hr
(5) Addition of masterbatch: ≤10%
(6) Main screw:Screw type: single screw type, automatic speed adjustment.
Heating mode: five temperature zones, electric heating package heating.
(7) Return material screw:
Screw form: single screw form.
Heating mode: five temperature zones, electric heating package heating.
(8) Metering pump: Drive: frequency conversion control.
Working capacity: 150～250cc/r
(9) Spinneret:
Aperture: φ0.42mm
Hole density: 3910 holes/m
(10) Circulating cooling air drafting system:
Drafting fineness can reach: 3dtex
The cooling temperature is controllable, the air volume is controllable, and the regulating valve controls the uniformity of the network.
(11) Rolling mill:
Heating form: heating by thermal oil.
Surface treatment: Nitriding treatment.
Flower stick embossing: one-word pattern, cross pattern, dot pattern.