Metal fiber blended conductive principle:

Update:10 Dec 2018
Summary:

  There are three kinds of conductive mechanisms f […]

 

There are three kinds of conductive mechanisms for metal fiber blended conductive yarns: conductive channel mechanism, tunneling mechanism and field emission mechanism.
1. Conductive channel mechanism

When the metal fibers can overlap each other in the conductive yarn, the probability of forming a chain-shaped conductive channel is large, and the conductive mechanism of the conductive channel plays a leading role;

2. Tunneling mechanism

3. Field emission mechanism

In the conductive yarn, the metal fibers cannot overlap each other, but the pitch is small, and the chain-shaped conductive channel cannot be formed. When the applied voltage is low, the tunneling conductive mechanism plays a leading role; when the conductive yarn is in the conductive yarn The metal fibers cannot overlap each other, but the spacing between the metal fibers is small, and the chain-shaped conductive channels cannot be formed. When the applied voltage is high, the field emission conductive mechanism plays a leading role.

Since the metal fiber blended conductive yarn is the dominant component non-uniform conductive yarn, this determines that the electrical conductivity of the metal fiber blended yarn is a combined result of the three conductive mechanisms.

Problems in detection and countermeasures taken

When the metal fiber bundles are mixed in the head, it is like the electronic strip dry quality inspection of the raw strips. However, since the electronic strips are capacitive, they are not suitable for the metal fiber medium coefficient, so the head and the second are no longer dry. The detection includes the roving and the spun yarn without the detection of the electronic strip.

Problems to be aware of during use

1. Effect on fabric density

Since the metal fiber blended yarn contains metal fibers, the diameter and unit volume vary with the content of the metal fibers. Compared with the purely spun product, the yarn containing the metal fiber material has an increased density and a smaller diameter, which is for the fabric density. Will have an impact and should be noted when designing the fabric;

2. Detection

In view of the difference in the dielectric coefficient between the metal fiber of the current capacitive electronic strip dryer and the conventional conventional fiber, the current capacitive electronic strip dryer cannot be used, and thus the relevant detection data is lacking;

Due to the different media, in the capacitive electronic yarn clearer, the yarn of the metal fiber blended yarn is immediately cut off when placed in the detector, so the capacitive electronic yarn clearer cannot be used to remove defects in the metal fiber blended yarn. . Therefore, the electric clearing must use the photoelectric electronic yarn clearer, and the photoelectric clearing device medium coefficient setting needs to be slightly larger than the ordinary yarn, specifically according to the condition of the broken pipe.

Semi-finished products for the detection of semi-finished products of metal fiber blended yarns can also control the quality of semi-finished products. For example, the strips are dried using a "Sachs bar" and the yarns are checked using a black strip.

Due to the high strength of the metal fiber blended yarn, it is easy to pull the finger when the value is broken. Therefore, the value of the turner, the use of white tape to wrap the fingers inspire us, the operation needs to pay attention to this detail.