Sam Weller have over 75 years’ experience working with, and supplying decatising wrappers to, leading companies in the cloth finishing industry – including all the finishing companies processing World renowned Fine Worsted fabrics from Huddersfield.
Based on the American word decating (originally applied to open blowing machines where the fabric was wrapped around a steam cylinder to press it) decatising is a process where the application of steam under pressure is used to impart a permanent finish on high-quality wool and woollen-blend fabrics. By this process fabrics acquire important physical and aesthetic qualities like dimensional stability, flowing drape, fine handle, crease resistance and a discreet glaze finish.
Satin Decatising Wrappers
Made with special cotton/synthetic blended yarn for extended life and therefore providing a more economical decatising process. Extra fine qualities are manufactured to make the finishing of fine woollen worsteds and mohair trouble free.
Raised Satin Decatising Wrappers
Raised on both sides they produce soft, dull, low-lustre finishes on the highest quality fine worsteds.
Molleton Decatising Wrappers
Ideally suited for producing volatized, soft finishes on heavy woollen fabrics.
| Product Code | Description | Weight (Linear Meter) of Processed Fabric | Features & Benefits |
|---|---|---|---|
| Q130000 | KB35 Quality | < 100g or heavier | Finest wrapper quality, with very dense weave and fine yarns, suitable for very high as well standard wrapper tension. “No Moiré” no “Wrapper Marks” with correct machine settings. |
| Q130005 | N35 Quality | > 100g | Very dense weave for fine fabrics. Higher absorbency for reduced risk of water marks. “No Moiré” no “Wrapper Marks” with correct machine settings. |
| Q130007 | N25 2/1 Raised Quality | > 100g | Raised finish for soft, dull, finish on light weight fabrics. “No Moiré” no “Wrapper Marks” with correct machine settings. |
| Q130010 | TC/N35 Quality | > 130g | PES/CO blend in warp direction. Fully heat-set. Suitable where acid pH is present in finishing operations. No Moiré” no “Wrapper Marks” with correct machine settings. |
| Q130015 | W3 Molleton Quality | > 350g | Very Heavy wrapper for processing heavy woollen fabrics. |
| Q13---- | Customer's own specification | As required | As required |
| Product Code | Description | Construction | Ends/cm | Picks/cm | Weight (g/M²) | Air Perm (lm²/sec/ 20cm²/100Pa) | Tensile Strength (N) | Dimensional Stability to Steam (%) |
|---|---|---|---|---|---|---|---|---|
| * Loom State | +/- 10/M2 | BS EN ISO 9237 | BS EN ISO 13934-1: 2013 | BS 4323: 1979 (1995) | ||||
| Q130000 | KB35 | Warp & Weft 65% Cotton/35% Polyamide | 31 | 123 | 375 | 43 | Warp: 930 Weft: 1540 | Warp: -2.4 Weft: -0.4 |
| Q130005 | N35 | Warp: 65% Cotton /35% Polyamide Weft: 75% Cotton /25% Polyamide | 31 | 120 | 368 | 43.5 | Warp: 1085 Weft: 1615 | Warp: -1.2 Weft: -0.4 |
| Q130010 | TC/N35 | Warp: 67% Cotton /33% Polyester Weft: 65% Cotton /35% Polyamide | 28 | 125 | 370 | 53 | Warp: 1875 Weft: 1550 | Warp: -1.2 Weft: -0.8 |
| Q130015 | W3 Molleton | Warp: 65% Cotton /35% Polyamide Weft: 100% Cotton | 20 | 42 | 685 | 18.5 | Warp: 860 Weft: 1315 | Warp: -2.9 Weft: 0.0 |
Achieving the required dimensional stability and the correct appearance requires a combination of the correct machine settings with the correct quality of wrapper. By fine adjustments of machine settings, variations in the finish can be achieved using the same type of wrapper. For some significant changes though, or when the fabric being processed is changed, a different type of wrapper may be required.
The specifications below are some example guidelines for the machine settings required to process different types of fabric. Individual machine manufacturers will provide further setting advice, which may need slight adjustments to suit specific customer requirements and fabric compositions/constructions.
| Parameter / Construction | 55% PES – 45% Wool | 55% PES – 45% Wool | 100% Wool |
|---|---|---|---|
| Wrapper Tension Beginning – End | 70kg – 110kg | 70kg – 110kg | 70kg – 110kg |
| Wrapper Pressure Roller | 90kg | 80kg | 80kg |
| Temperature | 123°C | 127°C | 120°C |
| Steaming | Inside to outside | Inside to outside | Inside to outside |
| Cooling time | 40 sec. (standard) | 30 sec. | 30 sec. |
| Weight of fabric | 340g m/linear | 320g m/linear | 260g m/linear |
| Atmospheric time | 2.5 minute | 2.5 minute | 2.5 minute |