Measuring Cyclic Oligomer Content in Synthetic Filament Extracted Yarns
Solvent extraction coupled with liquid chromatography isolates synthetic yarn cyclic oligomers to set strict delivery specs and stop knitting deposit failures.
Needle Friction Spikes
Heat Accumulation
High speed sewing machines generate intense heat at the point of contact between the needle and the fabric. These needle friction spikes can reach temperatures above three hundred degrees Celsius in less than a second of operation. This heat is caused by the mechanical resistance of the yarns as the needle passes through the structure at several thousand stitches per minute.
Lubrication Solution
Application of silicone based lubricants to the sewing yarn is the standard method for reducing this thermal build up. These oils act as a barrier that lowers the coefficient of friction, which prevents needle friction spikes from reaching the melting point of synthetic fibers. Consistent lubricant pickup is verified in the lab before the yarn is sent to the garment factory.
Material Impact
Thermal damage often appears as small melted spots. If needle friction spikes are not controlled, the needle can become hot enough to fuse the layers together.
Quality Control
Monitoring the temperature of the needle during production allows for the adjustment of machine speed or the replacement of worn needles. Sensors that detect needle friction spikes can alert operators to a lack of lubricant or a change in fabric density. Maintaining a stable temperature is necessary for the production of high quality apparel.