The role of purification and anti-static clothing and anti-static wrist straps in electronic processing enterprises
Anti-static clothing and anti-static wrist straps are an important part of the anti-static system to eliminate the human body, which can eliminate or control the generation of static electricity in the human body, thereby reducing the static electricity generated in the manufacturing process. The role of anti-static clothing and anti-static wrist straps in the workshop
Human body protection products in electronic processing workshops include anti-static coveralls, anti-static split clothing, anti-static gowns, anti-static shoes, hats, anti-static gloves, anti-static finger cots, anti-static wrist straps, etc. Anti-static work clothes are made of anti-static cloths of different colors. The fabric yarn contains a certain proportion of conductive yarn, and the conductive yarn is made of a certain proportion of stainless steel fiber or other conductive fibers mixed with ordinary fibers. Eliminate static electricity on clothing through corona discharge and leakage of conductive fibers. As stainless steel fiber is a metal fiber, the anti-static fabric woven from it has stable conductivity, but it does not change with the number of washing clothes. The role of anti-static clothing and anti-static wrist straps in the workshop
Anti-static clean clothing is a special protective clothing worn in a dust-free environment. It has the characteristics of anti-static and dust-proof. It is widely used in electronics, pharmaceuticals, food, biological engineering, optics, aerospace and other industries. The role of dust-free clothing and anti-static wrist straps in the workshop
Anti-static clean clothes (GMP/HACCP certified clean clothes) are made of ** polyester filament, warp or warp and weft interweaving of Belltron® 9R series conductive fiber from Japan Kanebo, which is woven by the * process. There are a variety of colors and specifications suitable for different anti-static or clean environments, including 100D×100D conductive silk suitable for 10,000-300,000 dust-free environment, and 75D×100D small for 1000 dust-free environment Grid, 75D×75D strips, 75D×75D grid conductive silk.
Adding a small amount of 9R1 can fully prevent the generation of static electricity, and has excellent static control ability.
Good washing resistance, bending resistance, abrasion resistance and other properties.
has the characteristics of sweat-absorption, dust-proof, anti-static, no fiber removal, smooth and soft, good air permeability, and the surface resistivity is 10 to the 6th power.
gown type, split type (jacket type), one-piece type (two-piece type, three-piece type, four-piece type). The selection criteria are: CLASS300000 (choose gown-style clean clothes); CLASS100000 (choose split clean clothes), CLASS10000 (choose two-piece clean clothes, three-piece clean clothes), CLASS1000 above (choose three-piece clean clothes or four-piece clean clothes) One-piece clean clothes), of course, it is also related to the selection of conductive fibers, which is also mentioned above. In addition, many pharmaceutical and food companies now adopt the four-piece type, thinking that this kind of dustproof effect is good. In fact, there is a problem in it. It is not very convenient to work. When you bend over, you will feel the back being pulled, which leads to the employees. Uncomfortable at work. It is recommended to use three-piece + a pair of soft-soled boots or hard-soled boots, the dustproof effect will not have any influence.
Anti-static wrist strap is the most important anti-static product when the operator touches electronic components. Through the grounding path, the static charge of the human body can be safely discharged. It is composed of anti-static elastic band, movable snap buckle, spring cord, protective resistor and plug or chuck. The inner layer of the elastic band is woven with anti-static yarn, and the outer layer is woven with ordinary yarn.
Anti-static wrist straps are divided into corded wrist straps, cordless wrist straps and smart anti-static wrist straps. According to the structure, they are divided into single loop wrist straps and double loop wrist straps. They are used to discharge static electricity from the human body. It is composed of elastic bands, movable snaps, spring cords, protective resistors and plugs or chucks. The inner layer of the elastic band is woven with anti-static yarn, and the outer layer is woven with ordinary yarn.
Anti-static wrist straps are also called anti-static bracelets, bracelets, etc.
main indicators: spring cord maximum length 250cm. Leakage resistance 10^6Ω (protection resistance 10^6Ω).
Anti-static wrist strap classification According to the ground wire material classification: PVC/PU/silver-plated/carbon-containing materials.
According to the material of the bracelet: metal, dust-free silicone, rubber band. Classified according to the discharge method: ordinary type / double loop / corona discharge.
Detailed introduction of anti-static wrist strap The role of dust-free clothing and anti-static wrist strap in the workshop
1. Wireless electrostatic wrist strap: It is developed based on the physical principle of (static voltage balance), based on the principle of "electrostatic engineering" that static electricity is transferred by the push method between ions. The feature of pushing from high potential pushes the electrostatic ions of the human body into the (collection area) of the drought body design, through the [charge induction principle], the front and back surfaces of the conductive plate will have "equal charges of opposite sex"-skin effect, Since the zone has built-in ion exchanger <utilizing its low free energy characteristics>, it can easily provide the introduced electrostatic ions with the same amount of opposite charges to neutralize, so the effect of electrostatic discharge can be achieved. In addition, a screw is installed outside the machine , Connect with the internal conductor loop.
(1) It can be used as an instantaneous introduction of a large amount of electrostatic charge due to improper contact with the high static power source. When the ion neutralization cannot be completed, the external air water molecules can be used to provide ion neutralization (for the Corona discharge effect). Effectively eliminate static electricity, and achieve the ultimate goal of static discharge (static voltage balance).
(2) This screw can be used for potential return to zero function (just touch the screw to the ground).
(3) It can be used as a loop detection terminal.
2. Wired wrist strap: It is the most basic of anti-static equipment, and it is also a must-have item for a commonly used production line. It is not only very convenient in erection and operation, but also economical in terms of price. The reason is The wrist strap and the grounding wire discharge the static electricity from the human body to the ground. Therefore, the wrist strap must be in contact with the skin when in use, and the grounding wire must also be directly grounded. Ensure that the grounding wire is unimpeded in order to achieve great effect.
The anti-static wrist strap electrostatic ring is a device that is worn on the human wrist to discharge the accumulated electrostatic charge of the human body. It is divided into wired type and wireless type, with metal ring and elastic conductive wire mixed ring. This product belongs to one of the anti-static wrist straps with buckle adjustment wired type, which can effectively protect the zero-resistance parts from the interference of static electricity, and is used to discharge the static electricity of the human body. It is composed of anti-static elastic band, movable snap buckle, spring cord, protective resistor and chuck. The inner layer of the elastic band is woven with anti-static yarn, and the outer layer is woven with ordinary yarn. The principle of the anti-static wired wrist strap is to conduct the static electricity of the human body to the earth through the wrist strap and the grounding wire. When in use, the wrist strap is in contact with the skin, and the grounding wire is directly grounded, so that it can exert its maximum effect. Wearing this anti-static wrist strap, it can safely remove the static electricity generated in the human body within 0.1 second. The grounded wrist strap is the most basic of anti-static equipment, and it is also *commonly used.
The product is equipped with a snap button on the outer side of the plastic block. The snap button passes through the plastic block through a metal connector and is connected with the conductive webbing on the inner side of the plastic block to form two independent circuit loops. The plastic block is divided into left and right Two pieces, two plastic pieces are hingedly connected to each other, and the snap buckles on the outer side of the two plastic pieces are respectively connected with their respective grounding wire end buckles; compared with the existing traditional wrist straps, when the wearer of the wrist strap is unconscious Even if one circuit fails, the other circuit can continue to work, reducing the probability of the insulation layer of electronic components being broken down by static electricity, avoiding mass scrapping or quality degradation of products, low cost of use, and extending the service life of the wrist strap. It is suitable for use by more * customers.
Product features and parameters of dual loop wrist strap:
1. Double loop electronics;
2. Wrist ring: elastic adjustable;
3. Material: two plastic sheets (PA6);
4. Color: red and blue;
5. Wrist ring resistance: ≤103Ω;
6. Winding line: PU outer skin, inner bag
7. Core copper platinum wire, 1MΩ resistance, equipped with two sets of grounding wires, all copper plugs;
First of all, the life of an anti-static wrist strap is closely related to its quality. Non-artificial normal work wear is the root cause of product damage. During work, the continuous bending of the wire of the wrist strap will eventually cause the metal fiber in the wire to be disconnected, resulting in the failure of the anti-static function of the wrist strap.
Foreign wrist straps have undergone strict bending tests for hanging heavy objects. The product technology, quality and process are strictly monitored to ensure that the product can meet the specified number of bending times, and the service life is 1-2 years. There are also some high-quality products, almost no damage caused by normal wear and tear, to provide customers with a lifetime quality guarantee.
The current status of domestic products is low quality and low price. So that the standard is only for the performance of the product, there is no standard for quality. As long as the product can reach a resistance of 1MΩ, it is qualified. No standard or guarantee can be provided for the service life.
There are many anti-static packaging products, such as anti-static shielding bags, anti-static packaging bags, anti-static sponges, anti-static IC packaging tubes, anti-static component boxes, anti-static turnover boxes, anti-static bubble films and anti-static transport vehicles. Most of these packaging products are made of static dissipative materials, and some of them are made of anti-static materials. The purpose is to protect the installed circuit or device and printed circuit from static electricity.