Question 1

Product Description

Accepted Answer

3M™ Polyester Label Material 7382 is a printable polyester label material designed for general industrial applications. This product uses 3M™ Adhesive 250E, which provides high adhesion to a variety of surfaces, including high surface energy (HSE) plastics and metals. 
Product designation / Shipping
Labeling: 7382 3M TT1 MS PET50-250E/21-90WG

Question 2

Physical properties

Accepted Answer

(Thickness specifications are target values)

Top material (film + coating): 55 µm polyester, matte silver
Adhesive: 19 µm 250E acrylate
Liner 90WG: 77 µm, 89 g/m² white, densified paper

Question 3

Key features

Accepted Answer

The top material is designed for use with standard printing processes such as screen printing, flexographic printing, and letterpress printing.
Variable information can be applied via thermal transfer printing.
VOID effect prevents label tampering.
Polyester top material offers good thermal stability and durability in harsh environments.
Densified glassine liner for consistent die-cutting.
UL MH18072 recognized.

Question 4

Application examples

Accepted Answer

Barcode labels and nameplates
Asset identification and inventory labels
Warning, operating, and service labels for durable goods

Question 5

Performance properties

Accepted Answer

Adhesion according to FTM1, 180° and 300 mm/min
(Standard conditions: 23 °C and 50% RH)

72 h RT (on stainless steel) → 6.0 N/cm
72 h RT (on ABS) → 6.9 N/cm
72 h RT (on polypropylene) → 5.3 N/cm
72 h at 70 °C (on stainless steel) → 7.6 N/cm
72 h at 40 °C, 98% RH (on stainless steel) → 6.8 N/cm
72 h at -40 °C (on stainless steel) → 5.8 N/cm

Temperature resistance
(on stainless steel, other substrates to be tested separately):

Operating temperature range (24 h, DIN 30646): -40 to +150 °C
Minimum application temperature (DIN 30646): 10 °C

Question 6

Processing

Accepted Answer

Printing:
Suitable for standard printing processes. Variable data via thermal transfer printing (resin ribbons recommended).
Confirm compatibility of ink systems and printing methods through real-process testing.
Die-cutting:
Rotary die-cutting recommended. Fan-folding not recommended. Carefully check small labels. Keep winding tension low to avoid adhesive bleed.
Packaging:
Store finished labels in plastic bags.

Question 7

Special notes

Accepted Answer

For maximum adhesion, the surface must be clean and dry.
Isopropyl alcohol is a typical cleaning agent (observe safety instructions).
For best adhesion, the application temperature should be room temperature or higher.
At temperatures below 5 °C, the adhesive may be too hard to achieve full contact.
Higher initial adhesion can be achieved by increased pressure.

Question 8

Storage and shelf life

Accepted Answer

Storage at 16–25 °C and 40–65% relative humidity
Shelf life: 24 months from date of manufacture

Question 9

UL certification

Accepted Answer

Individual materials and prints are recognized according to UL file MH18072.

Polyester Film VOID 7382