New Cryogenic Label Material

All-Tek has tested and approved its CryoTek® label material on glass slides and plastic vials in liquid nitrogen at -196°C (-320° F).

From time to time we all have run into applications that require a label material that will need to withstand and perform well in a cryogenic environment.  In the past, we have had solutions but our new product, CryoTek®, has proven to be far superior.

CryoTek2® (2mil adhesive) and CryoTek1® (1mil adhesive) are 5 mil,vacutainers1 woven nylon material with a permanent pressure sensitive acrylic adhesive and high opacity matte white color topcoat. The nylon label is an ideal choice to adhere to vials, test tubes and other rounded surfaces due to its flexibility.
These two products also provide excellent chemical durability when exposed to harsh chemicals such as: Sulfuric acid solution, Sodium hydroxide solution and Mineral Spirits to name a few.  CryoTek2® & CryoTek1® are designed for thermal transfer, dot matrix or write-on printing.
CryoTek1® has been tested and recognized to meet UL969 and CUL standards.

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APPLICATIONS

• Vial labeling
• Glass slide labeling
• Cryogenic labels
• Test tubes
• Plate labeling
• Extreme low temperature applications

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TESTING RESULTS

Test Objective:

Attach nylon label samples to glass slides and polyethylene cryogenic tube vials and immerse in liquid nitrogen for a period of one hour to determine if they adhere to the substrate during and after immersion.

Sample Information:

A total of four samples had two label samples affixed to the substrate as shown below in Figure 1.  The materials used for evaluation were the CryoTek2® & CryoTek1® both 5 mil nylon cloth materials.  CryoTek® films with a high opacity, matte white colored topcoat specifically designed for thermal transfer, dot matrix or write-on printing. The samples were labeled as A, B, C and D.  Substrates for samples A and B were nunc™ polyethylene cryoTube™ vials.  Substrates for samples C and D were glass slides.

cryo-labels2

Figure 1

Testing Method:

The samples were immersed in liquid nitrogen (temperature is -196°C or -320°F).

The samples were monitored during immersion at 15 minute intervals until testing was completed.

The immersion period was for one hour.

Immediately after removal from the liquid nitrogen, each label was lightly probed with a stylus to determine if it was loose or easy to peel.

The samples were allowed to return to room temperature.

Test Results:

Samples A and B (plastic vials)

•  During testing: all labels held firm

•  Immediately after testing (still cold): all labels held firm

•  At room temperature after testing: all labels held firm

Samples C and D (slides)

•  During testing: all labels held firm

•  Immediately after testing (still cold): all labels held firm

•  At room temperature after testing: all labels held firm

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