| TDS No. B-521 |
Effective Date: 21-Feb-2000
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Description:
B-521 is a woven glass cloth with a silicone pressure sensitive adhesive and a non-printable topcoat available in green, red, white, purple and yellow.
B-521 is recommended for high temperature work in process identification.
B-521 adheres strongly to glass and a variety of metal surfaces. The flexible label is designed to withstand harsh temperatures, and acidic and alkaline environments often encountered in manufacturing processes. The label is pressure sensitive at room temperature and becomes permanently affixed to objects at temperatures above 400°C.
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Details:
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PHYSICAL PROPERTIES
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TEST METHODS
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AVERAGE RESULTS
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| Thickness |
ASTM D 1000
-Total |
0.003 inch (0.076 mm)
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Adhesion to:
-Glass
-Stainless Steel |
ASTM D 1000
20 minute dwell
20 minute dwell |
40 oz/in (44 N/100 mm)
55 oz/in (60 N/100 mm)
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| Tack |
ASTM D 2979
Polyken™ Probe Tack
1 second dwell, 1cm/sec separation |
7 oz (200 g)
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| Tensile Strength and Elongation |
ASTM D 1000
-Machine Direction
-Cross Direction |
28 lbs/in (490 N/100 mm), 5%
24 lbs/in (420 N/100 mm), 9%
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PERFORMANCE PROPERTY
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FURNACE RAMP STUDY
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B-521 labels were applied onto glass microscope slides and placed in a high temperature oven. The oven ramps up to 450°C, where it dwells for 45 minutes. During this time, the B-521 label becomes fused (ceramicized) to the glass. The ramp rates were varied and the end result of the firing process was recorded.
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OVEN RAMP-UP RATES
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RESULT
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| Ramp = 6°C/minute |
pass, firing is good |
| Ramp = 8°C/minute |
pass, firing is good |
| Ramp = 10°C/minute |
pass, firing is good |
| Ramp = 12°C/minute |
fail, moderate blisters |
| Ramp = 14°C/minute |
fail, moderate blisters |
In order to form a permanent bond between the label and the glass, the recommended heating rate is less than 12°C/minute. Rapid temperature increases may result in label failure.
Testing was performed on both nonfired and ceramicized labels. Ceramicized labels were fired with the 8°C/minute ramp cycle.
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PERFORMANCE PROPERTIES
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TEST METHODS
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TYPICAL RESULTS
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| Long Term Low Service Temperature |
30 days at -85°F (-65°C)
-nonfired
-ceramicized |
No visible effect
No visible effect |
| Humidity Resistance |
30 days at 100°F (37°C),
95% R.H.
-nonfired
-ceramicized |
No visible effect
No visible effect |
| UV Light Resistance |
30 days in UV Sunlighter™ 100
-nonfired
-ceramicized |
No visible effect
No visible effect |
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PERFORMANCE PROPERTY
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CHEMICAL RESISTANCE
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Test performed on both nonfired and ceramicized labels. Testing consisted of a three minute immersion in the specified chemical reagent followed by 10 light brush strokes with a soft bristled brush. All reagents were tested at room temperature. Ceramicized labels were fired with the 8°C/minute ramp cycle.
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CHEMICAL REAGENT
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SUBJECTIVE OBSERVATION OF VISUAL CHANGE
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NONFIRED LABEL STOCK
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CERAMICIZED LABEL STOCK
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| Methyl Ethyl Ketone |
Moderate label removal |
No visible effect |
| Isopropyl Alcohol |
Slight fade |
No visible effect |
| 6% Hydrofluoric Acid |
No visible effect |
Moderate fade |
| 15% Nitric Acid |
No visible effect |
No visible effect |
| 4% Ammonium Bifluoride |
No visible effect |
No visible effect |
| 3% Alconox® Detergent |
No visible effect |
No visible effect |
| 10% Sodium Hydroxide Solution |
No visible effect |
No visible effect |
| 10% Sulfuric Acid Solution |
No visible effect |
No visible effect</ td> |
| ASTM #3 Oil |
No visible effect |
No visible effect |
Product testing, customer feedback, and history of similar products, support a customerperformance expectation of at leastsix months from the date of receipt for this product as long as this product is stored in its original packaging in an environment below 80 degrees F and 60% RH . We are confident that our product will perform well beyond this time frame. However, it remains the responsibility of the user to assess the risk of using such product. We encourage customers to develop functional testing protocols that will qualify a product's fitness for use, in their actual applications.
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Trademarks:
Alconox® is a registered trademark of Alconox Co.
Polyken™ is a trademark of Testing Machines Inc.
Sunlighter™ is a trademark of the Test Lab Apparatus Company
ASTM: American Society for Testing and Materials (U.S.A.)
All S.I. Units (metric) are mathematically derived from the U.S. Conventional
Units.
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Note: All values shown are averages and should not be used for specification purposes.
Test data and test results contained in this document are for general information only and shall not be relied upon by Brady customers for designs and specifications, or be relied on as meeting specified performance criteria. Customers desiring to develop specifications or performance criteria for specific product applications should contact Brady for further information.
Product compliance information is based upon information provided by suppliers of the raw materials used by Brady to manufacture this product or based on results of testing using recognized analytical methods performed by a third party, independent laboratory. As such, Brady makes no independent representations or warranties, express or implied, and assumes no liability in connection with the use of this information. |
WARRANTY
Brady products are sold with the understanding that the buyers will test them in actual use and determine for themselves their adaptability to their intended uses. Brady warrants to the buyers that its products are free from defects in material and workmanship, but limits its obligation under this warranty to replacement of the product shown to Brady's satisfaction to have been defective at the time Brady sold it. This warranty does not extend to any persons obtaining the product from the buyers. This warranty is in lieu of any other warranty, express or implied, including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose, and of any other obligations or liability on Brady's part. Under no circumstances will Brady be liable for any loss, damage, expense, or consequential damages of any kind arising in connection with the use, or inability to use, Brady's products. |
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Material may not be reproduced or distributed in any form without written permission. |
