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Laser Markable Label Stock 7847

Product Data Sheet

Updated : July 2000

Supersedes : November 1994

Product Description

ScotchMark 7847 laser markable label stock is a two layer film designed for the

production of labels in laser marking facilities.

Due to a special production process the black top layer and the white base layer form a

homogeneous unity.

The acrylic film is halogen-free and highly resistant to chemical substances, temperature

and other environmental influences.

ScotchMark Laser markable Label stock 7847 is coated with a modified acrylic adhesive

and shows good primary adhesion as well as a high final adhesion even on low energy

surfaces such as polypropylene.

Depending on specific application ScotchMark Laser markable Label stock 7847 can

also be used for tamper-evident identification. In most cases labels cannot be

transferred without damage once they have been applied to a surface.

Physical Properties

Not for specification purposes

Construction

White base film (caliper approximately 50 μm) with black

surface coating (caliper approximately 10μm).

Material

Acrylate

Adhesive

Modified (high-performance) acrylic adhesive of 350 series

(caliper ca. 30μm).

Permanent low-temperature adhesive.

Liner

Densified Kraft paper, caliper 80μm, weight: 94 g/m²

Shelf Life

24 months from date of manufacture by 3M if stored at

room temperature condition in cool, dry and sun protected

room.

Features:

·

Markable with all Nd-YAG laser marking equipment available on the market.

·

High contrast of the markings (especially with BARCODES).

·

Very good abrasion resistance, temperature resistance as well as resistance to

chemical substances.

·

No corrosive emissions during the laser marking process.

·

Very good weathering resistance.

·

UL-approval : File No. MH16411

·

CSA-approval : File No. 99316

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Date : July 2000

Laser Markable Label Stock

7847

Product Availability

ScotchMark Laser markable Label stock 7847 is available as endless roll material. If

pre-die-cut labels are requested 3M will recommend several converters specialising in

the production of various different formats. If no equipment for laser marking is

available, 3M can name, if desired, companies which quickly and reliably do laser

marking according to customer specification.

3M also names appropriate laser equipment manufacturers if in-house marking is

required.

Physical Properties

Not for specification purposes

Minimum Application

Temperature

+ 4°C

Weight per m² (film &

adhesive)

90 - 100 g/m²

Elongation at Break

approx. 13 %

Tensile Strength

min 25 N/25.4mm

Elongation at Break and Tensile Strength have been tested according to DIN 53455/ISO

527, 300 mm/min.

Spraying with Salt Water

168 h / 5% concentration / 35°C - No Change

Adhesive Performance /

Bond Strength

Not for specification purposes

Measured according to DIN 306-46, part 1 (jaw separation speed 300mm/min., at 180°C

angle, film width: 25.4mm). Adhesive performance for the individual case can depend on

the texture of the substrate surface. The above adhesive values are average values.

They are not appropriate for specifications.

Substrate N/25.4 mm

Afera Steel 30

Aluminium 30

Polypropylene 20

Polyethylene 18

Polycarbonate 25

ABS 28

PVC 30

Resistance to

Environmental

Conditions

(according to automotive specification DCC 654A-Europe)

(applied to aluminium)

72 h 80°C

7 h 80oC

24 h 38°C (98% relative humidity)

24 h 38oC (98% RH)

7 h -30°C (98% relative humidity)

17 h -30oC

17 h 38°C (98% relative humidity)

No Change

No Change

No Change

No Change

No Change

No Change

No Change

No Change

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Date : July 2000

Laser Markable Label Stock

7847

Resistance to

Chemicals and

Substance Exposure Time Result

Solvents

Distilled Water @ 65°C 390 hours No Change

SAE 20 motor oil at 25°C 250 hours No Change

Sodium hydroxide solution 200 hours No Change

Sulphuric Acid (30%) 300 hours No Change

Petrol (lead free ordinary) 1 hour No Change

95% Relative Humidity @

38°C

250 hours No Change

Xylene 0.5 hours No Change

N-Heptane 0.5 hours No Change

Isopropanol 0.5 hours No Change

Resistance to Abrasion

·

Abrasion test Tabor/Abrader (applied to Aluminium), CS 10 wheels, 500g per wheel

up to 300 cycles : No Change

·

Crock Meter Test (1) 200 cycles.

·

SAE 20 motor oil at 25°C

·

Gasoline for cleaning

·

1% Pril in H2O

·

Percentage Isopropanol/water - 50:50

·

N-Heptane

·

1,1,1 Trichloroethane

·

Crock Meter Test (2), FAM test liquid according to DIN 51604, part 1,

·

12 cycles, Part A (50% Toluene, 30% Isoctane,

·

15% Diisobutylene, 5% Ethanol) - no change.

·

UL Recognised as Printing Materials Component - UL 969 under File No. MH 16411

(N)

·

CSA Accepted as Class 7924 under File No. 99316 - indoor and outdoor use.

Weather Resistance

(Thermal Cycling)

Acceleration test in the Xenon device 2000 hrs according to DIN 53387 (equivalent to 4-5

years outdoor exposure to weather) : No change

Temperature

Resistance

300°C for 1 min.

250°C for 7 days

150°C for 14 days

Dimensional Stability :

No Change

Low Temperature

Resistance

Without Stress -60°C

With Stress -30°C

(tested according to Gardner Impact

Test)

No Change

No Change

Humidity Resistance

3 days at 32ºC (90ºF) and 90% relative

humidity

No Change

3 days at -40ºC (-40ºF) No Change

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Date : July 2000

Laser Markable Label Stock

7847

Processing

Marking/Cutting:

ScotchMark Laser markable Labelstock 7847 can be marked and cut with all Nd-Yag

laser marking equipment on the market.

In order to optimise optical results we recommend to individually adjust marking

parameters (power, pulse rate, speed) to your requirements depending on the kind of

label to be produced (BARCODES or characters).

When laser marking, you should always ensure that the emissions at the laser beam

work area are extracted by the combination of a suitable encapsulation and an adequate

exhaust system. Additional filtration is not required.

For more information about emissions arising during the laser marking process with

ScotchMark 7847, please contact our division Safety, Security, Environmental Protection

and Product Assurance in Neuss, Germany (Phone : 49-2131-14-2042).

Printing:

Screen printing with weather resistant inks.

Die-Cutting:

When weed-stripping the inflexibility of the material has to be considered. Therefore the

use of "rounded" corners is recommended.

Warranty & Liability

All information above is based in our present experience with the material. Prior to the

use of the product by the customer it is his responsibility to test whether it is suitable for

the intended application, always considering all relevant factors that might affect this

application.

All warranty and liability issues including the warranty period for this product will be

settled on the basis of our general trade conditions valid at the time, except if there are

legal regulations which stipulate different proceedings.

3M does not assume warranty and liability for the converting of the films.

3M is a trademark of the 3M Company.

Values presented have been determined by standard test methods and are average values not to be used for specification purposes.

Our recommendations on the use of our products are based on tests believed to be reliable but we would ask that you conduct your own tests to

determine their suitability for your applications.

This is because 3M cannot accept any responsibility or liability direct or consequential for loss or damage caused as a result of our

recommendations.

Tapes & Adhesives Group

Ó

3M United Kingdom PLC 2000

3M United Kingdom PLC

3M House, PO Box 1,

Market Place,

Bracknell, Berkshire,

RG12 1JU

Product Information :

Tel 0870 60 800 50

Fax 0870 60 700 99

3M Ireland

3M House, Adelphi Centre,

Upper Georges Street,

Dun Laoghaire, Co. Dublin,

Ireland

Customer Service :

Tel (01) 280 3555

Fax (01) 280 3509