The WPF-JXPX is a discontinuous open-width washing machine: the whole piece is sewn end to end into a loop and stays in open width throughout the wash, never gathered into rope form. Kept in open width throughout and never gathered into rope form, it avoids the creases rope scouring presses in, leaving the fabric evenly treated; washing itself is carried by two nip pairs in series and high-pressure side sprays. QL offers this open-width washing machine on worsted and woollen routes, as the alternative to the rope scouring machine, the WPF-XN.
Where this machine sits in the line, and what comes before and after
This washing machine sits at the scouring stage, taking over after fabric inspection, or after wool milling on the WPF-1S and scutching. It stands alongside the rope scouring machine, the WPF-XN, as one of two choices at the same decision point — take the open-width route and the scutched fabric goes straight onto this machine, with no need to rope it up. Once washed, the fabric passes in open width directly to crabbing, on the WPF-ZN batch crabbing machine or the crabbing section of the WPF-LXZH continuous crabbing and drying line, and on to dyeing.
What it changes in the fabric, top or yarn: handle, dimensional stability, lustre, cleanliness
This washing machine sews the whole piece end to end into a loop and runs it in open width throughout the wash, never gathered into rope form, removing the creases rope scouring leaves behind. Washing itself is carried by two pairs of squeeze rollers in series: ahead of each pair, high-pressure sprays play on the face and back of the fabric, rinsing off surface soil and dust. On every circuit the fabric passes both nips, each one pressing out the liquor held within the fabric, now laden with dissolved oily soil — spinning oil, size and general soil are washed out this way, and the same wash removes soap liquor left over from wool milling. High-pressure spray pipes at either side spread the fabric flat, the spreader roller opens it out and the guide roller keeps it centred, so the fabric comes out free of curled selvedges.
Why this machine is necessary: what happens without it, or with another method
Because this washing machine keeps the whole piece open and circulating rather than roped, it avoids the permanent creases and uneven treatment that rope scouring can press into some fabrics, even though rope scouring cleans just as thoroughly. After wool milling, fabric that skips open-width washing has to be roped up again just to rinse out the soap liquor. Washed open-width instead, the soap liquor comes out directly, with no need to rope it, and the fabric goes straight on to crabbing without scutching. Washing that falls short has its own cost: spinning oil and size left in the fabric carry through to dyeing and finishing, and affect how the dye takes and how later finishing performs.
Setting the parameters: temperature, tension, speed, time
Speed is adjustable from 0 to 100 m/min. The two nips run in series, and roller pressure is adjustable. The liquor is heated directly by steam and temperature-controlled automatically. The exact temperature is set by trial on each quality — ask QL for the process sheet. Maximum batch load is 180 kg, on a working width of 2,000 mm.
The questions customers ask most
- Should scouring be rope-form (WPF-XN) or open-width (WPF-JXPX)?
- Can the WPF-JXPX open-width washing machine be used on knitted fabric?
- What about curled selvedges, and wet fabric being stretched?
- Does open-width washing get the fabric clean?
- Rope scouring presses in creases and washes unevenly — can the fabric stay unfolded?
- After milling, we want to wash out the soap liquor in open width — how?
Which process routes it appears on
This washing machine appears on the worsted top-dyed and piece-dyed process routes, and the woollen stock-dyed and piece-dyed process routes. Get in touch with QL about the WPF-JXPX: WhatsApp +1 380 900 2442, or +86 189 2110 8080.