BothwellSpinin

Theme by Anders Norén

Category: Spinning, Material

July 28, 2020

Combed Yarn

What was once an arduous process done by hand is now a highly specialized industrial technique. Combing the raw fibers that are used to make a thread or yarn is industry in and of itself. In this sector, the short fibers that carry unwanted plant material are removed, small impurities that still remain after the caring are separated and the fibers are processed.

This might seem like a waste, but these impurities are not beneficial to the

All this improves the uniformity of fiber length which is essential to achieve very fine yarns of good quality and strength.

The short fibers removed give rise to the sub product which is transported pneumatically to a press.

With regard to the production values stops achieved with state-of-the-art equipment fully automated, the order of ~70-75 kg per hour is reached, corresponding to about 500 strokes of the comb with a density of 80 gr/m. This high production is achieved thanks to computer synchronization throughout the line.

Costs today have been reduced dramatically compared to previous-generation machines, as significant energy savings have been achieved, fewer minor styling erasers thanks to excellent fiber selection and high machine efficiency and short machine downtime, among other improvements.

The fully automatic roll changer and thread splicer produce the best splice quality and the automatic roll transport system complete the features in the modern styling systems. Through these innovations the modern system was able to improve over the past machines

June 26, 2020

Classifying Fibers

The spinning is based on mechanical procedures and unlimited length with unlimited raw materials.

These materials or elements can be divided into 3 classes:

  1. Short filaments (short fiber) such as cotton, wool etc.
  2. Intermediate length filaments such as hemp, jute and wool.
  3. Filaments of determined length such as silk.

In the process we will first work with machines called flap, card, which is reduced to cleaning the fiber. The following machines of the process to regularize the base of the fiber for further processing..

When talking about yarn or yarns, or even of simple fibers twisted with each other, we talk about the base material (this is important no matter what the desired output is) and since ancient times, it has been marketed based on its quality, with a measure of length, thickness and weight.

Cotton yarns, wool, silk, etc., even if they are apparently cylindrical there is more variation, and still lack a lot of what we have come to expect in modern life, uniformity, since it does not have a regular diameter, therefore its thickness cannot be determined as a wire, etc.

Where it turns out that it can only be based on length and weight.

The classification of the fibers are in two groups:

  1. Constant Weight System
  2. Constant Length System

When it is necessary to refer to the thickness of a yarn or thread it is clear that it is difficult measuring it due to the small size and by the irregularity due to the twisting and tension of the yarn especially in the natural fibers.

An indirect system of expressing thickness was then used and the concept of numbering and title arose.

In spinning systems there are several forms of holder or numbering of yarns whether the source material is cotton, wool or synthetic.

There are several methods for numbering threads. The coexistence of all of them is due to the inertia of the custom, since with some only of them would be sufficient.

Numbers that describe the characteristics of a thread are called the title, and must be preceded by the technique that was used.

Numbering systems are classified into two groups well differentiated by their opposing approaches: Direct Systems and Reverse Systems.

April 26, 2020

The Many Fibers of Spinin

The most enjoyable aspect of spinning is that you get to work with many different types of fiber. Each one brings with it its own properties that make it challenging to work with. Each one has its own unique character when it is completed.

Natural fibers, without exception, require several successive processes to obtain clean and uniform fiber, suitable for yarn. This short fiber, (a few centimeters), has a rough or twisted surface that facilitates its cohesion with similar fibers.

Natural fibers can be:

Of animal origin.

  • Wool
  • Silk
  • Mohair
  • Cashmere
  • Angora

Plant-based.

  • Cotton
  • Linen
  • Jute
  • Hemp

And artificial fibers.

Chemical fibers are obtained by extrusion: regenerated cellulose in the case of artificial fibers or synthetic polymers in the case of synthetic fibers. These fibers are long, i.e. they are already spun to be able to manufacture fabrics with them, but they can also be cut to spin them as if it were natural fiber.

The wool of the sheep is easily synthesized, as it is curled by nature, but can also spin the hair of other animals, such as yak, goat, angora rabbit, and alpaca, among others.