What is singeing? Type of singeing.

Singeing

Singeing

Singeing is a process, which removes protruding fiber from the fabric surface by lighting a gas fire, or a deliberate method of treatment.

Objectives of singeing

1. Singeing increased wettability and better dyeing characteristics.

2. It improved reflection and no "frosty" appearance.

3. It gives a smoother surface and better clarity in printing.

4. It improved visibility of the fabric structure, less pilling, and decreased contamination through the removal of fluff and lint from cotton fabrics.

Singeing Process

A singe is a slight scorching, burn, or treatment with flame. This may be due to an accident, such as scorching one's hair when lighting a gas fire, or a deliberate method of treatment or removal of hair or other fibers. In the textile industry, loose fibers protruding on the surface of textile goods are singed to remove them. The process is usually to pass one or both sides of fabric over a gas flame to burn off the protruding fibers. Infrared or heat is used for thermoplastic fibers. Singeing of yarns is called "gassing". It is usually the first step after weaving or knitting, though the fabric may be brushed first to raise the surface fibers. Then passes over the heated copper plate or open gas flame. This is done very rapidly, otherwise fabric burns.

Type of singeing

1. Plate singeing

2. Roller singeing

3. Gas flame singeing

Plate singeing

The fabric goes over and over with one or two heated curved copper panels in this type of singeing machine. The plate thickness ranges from 1 and 2 inches. Suitable combustion of gas mixed with air is used to heat the plates. The plates are heated to light redness and the fabric fills the plates at a speed of from 155 to 260 meters per minute and is in contact with it.

Roller singeing

The fabric moves through and into contact with a heated cylindrical cylinder made of copper or cast iron with this kind of singeing machine. With internal firing, the rotary cylinders turn slowly, and a cool surface of the roller constantly comes into contact with the fabric. This type of machine is perfect for velvet and other pile fabrics to be singed.

Gas flame singeing

The singeing process where a gas burner is used for removing protruding fiber is called gas flame singeing. A perfect mixture of gas and air under pressure is used as the source of heat in gas singeing. This mixture is fed into a combustion slot burner. It is possible to use coal gas, petrol gas, or butane gas as fuel. The width of the burner can be adjusted to different widths of the fabric. The flame height and consequent heat intensity for different fabrics can vary by changing the pressure or mixture gas and air ratio of the mixture.

Conclusion

Cellulose fibers such as cotton are easily singed because the protruding fibers burn to light ash which is easily removed. Thermoplastic fibers are harder to singe because they melt and form hard residues on the fabric surface.



Reactions

Post a Comment

0 Comments