ESD T-Shirt short sleeve white, 150 gsm compact cotton, conductive rib collar - A1-ESD

In cleanroom ante-areas and measurement rooms the single fibre often causes more trouble than the voltage does. One piece of lint on a populated board distorts an optical inspection, sits in the solder paste image or lands exactly where the probe is about to touch down. Workwear that sheds while the operator reaches and bends is already working against the process before anyone mentions charging.

This T-shirt starts there. Combed compact cotton yarn at 150 gsm releases fewer fibres than softly spun goods, because the short fibre ends are removed before spinning and the remaining ones sit tightly in the yarn. The 4 % share of conductive yarn is knitted in across the surface, and the conductive rib collar pulls the neckline into the same path to ground.

White adds a check that anyone can make in passing. Soiling shows up early, the shirt goes to the laundry sooner, and the amount of particles carried in on clothing stays low.

Your benefits

• Low fibre release at the bench: Combed compact yarn locks short fibre ends into the yarn body. Noticeably less ends up on the populated assembly under the microscope in ante-areas and at inspection stations.
• Soiling shows up early: On white, every trace of solder paste, cleaning agent or glove powder is obvious at once. The garment is swapped in time instead of carrying contamination through the production area.
• Tested surface resistance: 10⁵ to 10⁸ ohms, measured by the STFI test institute to DIN EN 61340-5-1:2016 at 23 °C and 25 % relative humidity, so under deliberately dry and therefore critical conditions.
• 150 gsm across a full shift: Cotton at this weight takes up moisture and stays more comfortable at an eight-hour soldering or test bench than a dense synthetic fabric of the same thickness.
• Conductive rib collar: The collar sits close to the neck and ties the upper edge of the garment into the dissipative path, rather than leaving an uncontrolled zone where the wearer moves most often.
• Clear contrast under magnifiers: Under magnifying lamps and cool white bench lighting the contrast to components, tools and boards stays high, which keeps the operator's own hands easy to follow.
• Twelve sizes from 3XS to 6XL: Production, laboratory, service and visitor demand can be covered from one range. From 3XS to 6XL it stays the same version, the same colour and a single order line.

Linting behaviour and particle load

Particles come from fibre ends that are free to move. The yarn used here is combed, short fibres are taken out before spinning, and what remains is held more firmly in the compact yarn. Reaching, bending and placing components therefore release less material than with softly spun goods. In measurement rooms and cleanroom ante-areas that difference decides whether an assembly passes or goes back for rework.

White adds a visual check that needs no instrument. Oil, glove powder and cleaning residue stand out immediately, the shirt is replaced earlier, and during audits or customer visits the shop floor presents a clean picture. White is not more dissipative than any other colour. The dissipative behaviour comes from the knitted-in conductive yarn alone.

• Combed compact yarn with a reduced share of short fibres
• Cotton instead of synthetics, so less charge builds up in the fabric
• White makes soiling visible early and shortens the change interval

Material and fabric

96 % cotton and 4 % conductive yarn, made up to a weight of 150 gsm. Cotton charges less readily than synthetic fibres, absorbs moisture and is less prone to odour, which matters across a full shift at the test bench. The yarn is ring spun and therefore evenly twisted, which is what gives the fabric its dimensional stability over many wear and wash cycles.

Reactive dyeing means the dye forms a chemical bond with the fibre instead of merely resting on it. Together with the combed compact yarn the result is a soft, smooth handle that does not scratch on the skin. Anyone who rubs the fabric between two fingers will feel the difference to openly spun standard goods straight away.

• 96 % cotton, 4 % conductive yarn
• Fabric weight 150 gsm
• Combed compact cotton yarn, ring spun
• Reactive dyed

Construction in detail

The crew neck is finished with a conductive rib collar. Rib knit pulls back into shape after the shirt is put on, so the neckline does not stretch out, and the dissipative path does not stop at the top edge of the body panel. A neck tape covers the shoulder seam on the inside, which prevents chafing when the wearer leans over an assembly for long periods.

A pocket on the left chest holds a pen, a travel card or an ID badge within reach without leaving the workstation. The ESD logo on the left sleeve stays visible even when the wearer is seated, so membership of the EPA can be read at a glance by auditors and supervisors.

• Conductive rib collar at the crew neck
• Neck tape covering the shoulder seam
• Left chest pocket
• ESD logo on the left sleeve

Lasting dissipation and wash resistance

The conductive yarn is worked into the fabric at a share of 4 %, not applied as a coating. Its effect therefore does not disappear with the first laundry cycle but is retained over many washes. High-grade silver yarn is processed in a method developed for this purpose.

For purchasing this is a question of service life. A shirt whose values stay inside the window after twenty washes does not consume half a batch every quarter. The garment is suitable for industrial laundering, and the binding statements on temperature and process are printed on the care label inside the garment.

Fit and size range

Twelve sizes running 3XS, 2XS, XS, S, M, L, XL, XXL, 3XL, 4XL, 5XL and 6XL cover an entire workforce, from a slim build in the laboratory to oversize requirements in logistics. Anyone kitting out a whole site needs no second supplier for the edge sizes. All twelve sizes come from the same series and the same construction.

The size chart takes the guesswork out of the assignment and is available as a PDF in the Downloads tab. For a first order covering a full team, a sample set in two or three sizes pays off, so that the repeat order runs without returns and without a second round of measuring.

Technical data

Applications

• Placement and soldering benches in electronics manufacturing
• Measurement and test rooms with optical inspection under magnifiers
• Cleanroom ante-areas and airlock zones of an EPA
• Semiconductor and assembly stores with daily order picking
• Rework and repair stations with frequent component changes
• Training and visitor areas where clothing signals who belongs where

Care and service life

The T-shirt is suitable for industrial laundering. The conductive yarn is knitted in rather than applied, so the dissipative behaviour is retained over many wash cycles. Ring spun compact yarn holds the shape, and the rib knit neckline stays in form. Binding details on temperature and process are printed on the care label inside the garment.

Finishing and custom versions

Printing up to 160 °C and embroidery are possible, a sample print in advance is recommended. On white, coloured logos and area markings come out well. Equipment options, contrast versions, sleeves with conductive knit cuffs, a long sleeve version with conductive rib cuffs and special colours outside the catalogue range are available on request.

Standards and testing

Surface resistance is 10⁵ to 10⁸ ohms, tested by the STFI test institute to DIN EN 61340-5-1:2016. The test climate was 23 (+/-1) °C at 25 (+/-5) % relative humidity, that is under dry conditions in which charging is most likely to occur. Further ESD standards were not part of this test, and no certification beyond it exists for the garment.