Different Types of Yarn Knots
Dept. of Textile Technology
Sarvajanik College of Engineering & Technology, Surat, India
The ends of yarn joined by knots is called knotting & the end of yarn joined by knotless join is called splicing.
So, there are four methods of yarn joining:
What is Knotting?
- Knotting is tying two threads to each other or to tie thread to any other object.
- The joint between one thread to another or object is called Knot.
Hitches – used when attaching rope, cord and yarn to an object or when an object is used as an anchor for the knot.
There are two main purpose of introducing knots in textile.
- Continuity knots: are used for continuity of yarn.
- Clearing knot: are to substitute yarn faults during yarns clearing.
A knot should satisfy various requirements for different uses in textile industry which areas under:
- It should be easy to tie.
- It should Have good resistance to slippage.
- It should be of size & shape that gives a little chance of catching or jamming from warp beam to cloth fell.
Different types of yarn knots:
Dog knot: Tying of dogs knot is simple and quick but it is bulkier than weaver’s and fisherman’s knot. It is only suitable for creeling and these knots will not be incorporated into the fabric.
Fisherman’s knot: It is most popular but it is not at all convenient to lie by hand. They have a diameter 3-4 times that of parents yarn and are popular for filament, cotton, woolen, worsted and blends.
There are 3 verities of fisherman’s knot i.e.
With S&L denoting the direction of 2 ends with the component over knots.
The reef knot can be considered an unsafe knot when human life depends on it. If used to tie two ends of any rope or cord together this knot will spill easily when any of the ends are tugged.
The knot will spill into reversed half hitches and will then continue to slip resulting in the two joined ends coming apart.
- The weavers knot has a number of variations which for ease of classification are called weavers knot.
- The method of tying each knot is similar and they are usually started with both strands to be joined held in the left hand. The knot is then worked with the right hand to bring it into shape.
- It has very less slippage.
- Weaver’s knot is specially used in cotton threads.
- Weavers knots are a vital part of the textile industry. Without them all traditional woven materials would undone.
Factors affecting quality of yarn knots
1. Resistance to slippage: – most of the knot fail in downstream process is due to slippage. Degree of slippage depends on fiber type blend, composition, linear density.
2. Size of knot: – A bigger knot causes serious obstruction as it passes through small path like heald eyes, reed dent and knitting needles etc. it leads to uneven tension and results in breakage.
3. Knot tail ends: – the tail length should basically be judged from the linear density and rigidity. For yarn of lower D and rigidity, the tail length should be short and vice versa for greater LD and rigidity.
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Founder & Editor of Textile Learner. He is a Textile Consultant, Blogger & Entrepreneur. He is working as a textile consultant in several local and international companies. He is also a contributor of Wikipedia.