Analytical Instruments and Methods for Adhesive Tape Testing

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Adhesive Tape Testing in Laboratory.
The Various Properties and the Test Methods are described

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Analytical Instruments and Methods for Adhesive Tape Testing

  1. 1. Ichemco Sales Meeting Milano23-24-25June2014 Analytical instruments and methods
  2. 2. Main characteristicsof an adhesive Tack Peel Shear
  3. 3. TACK The property of an adhesive that enables it to bond immediately to a surface. Methods: PSTC-6 (RBT) ; ASTM D3121 (RBT); ASTM D2979 (PROBE); TLMI (LOOP). Temperature: 23 ± 2°C Factors that have an influence on the result: Loop Tack LT-1000 Probe Tack PT-1000 Factors that have an influence on the result: o Temperature of the test o Grammage of adhesive o Speed test o Type of backing Rolling Ball Tack RBT-100
  4. 4. PEEL PA-1000-180 Method: AFERA 5001, ASTM D1000 Speed: 300 mm/min Angle: 180° Pressure: 2 kg roll weight for four times A material's ability to resist forces that attempt to pull an adhesive apart by separating flexible surfaces. Pressure: 2 kg roll weight for four times Dwell time: within 1 minute Panel: Steel Factors that have an influence on the result: o Temperature of the test o Grammage of adhesive o Speed test o Type of backing o Dwell time o Angle o Pressure
  5. 5. SOLACRIL 758 15.0 20.0 25.0 Peel adhesion 0.0 5.0 10.0 0 5 10 15 20 25 30 35 40 45 50 Peel adhesion (N/in) coating weight (g/m2) peel steel after 24 hrs peel steel after 20 minutes peel steel within 1 minute
  6. 6. SOLACRIL 758 20.0 25.0 30.0 Solacril 758 0.0 5.0 10.0 15.0 0 5 10 15 20 25 30 35 40 45 50 coating weight (g/m2) peel steel after 24 hrs (N/in) peel HDPE after 24 hrs (N/in) peel glass after 24 hrs (N/in) RBT (cm)
  7. 7. SHEAR A material's ability to resist forces that attempt to pull an adhesive apart by separating flexible surfaces. Method: AFERA 5012 Panel: Standard Steel Test area: 24mm x 24 mm Weight: 500g or 1000g Pressure: 2 kg roll weight for four times Static shear at 23°C RT-30 • SAFT «Shear Adhesion Failure Temperature» SOSI-8 Integrated SO-8 Oven & HT-8 • Static shear at 70°CFactors that determine the properties: o Temperature of the test o Grammage of adhesive o Weight o Area o Pressure Pressure: 2 kg roll weight for four times Dwell time: within 1 minute
  8. 8. TECHNICAL SPECIFICATIONS In our Technical data Sheets and in the Certificate of Analysis, the following parameters are always shown: • TOTAL SOLIDS • VISCOSITY • pH (for waterborne products) • MELTING POINT (for solids) • SOFTENING POINT (for HM) 8
  9. 9. TOTAL SOLIDS Definition: The total content of suspended and dissolved solids in water/solvent • Test Method n. 1 Total Solids • MU: % • Procedure: A clean tinplate dish is weighed to the nearest mg (W1). 2-3 g of the sample are quickly weighed into the dish and the sample weight recordered to the nearest mg (W2). The content of the dish are spread as evenly as possible over the bottom of the dish by tilting. The dish and its content are then placed in the oven for one hour at 110°C. After the specified time the dish is removed from the oven, allowed to cool in 2-3 minutes, and weighed to the nearest mg (W3). Two determinations shall be carried out and the result reported as the mean of oven, allowed to cool in 2-3 minutes, and weighed to the nearest mg (W3). Two determinations shall be carried out and the result reported as the mean of two, provided the two determinations do not differ more than 2%. Total solids content: (W3-W1)/W2*100 %. If the sample total solids content is less than 5%, 10- 15 g must be weighed and the two determinations must not differ more than 0,03%. • Instruments: Analitic balance with 1mg accurancy. Oven, thermostatically controlled at 110°C. Flat bottomed tinplate dish 75 mm diameter and 10 mm deep. • Recordings: Report the Total solids content value in % with the sample identifying data. • References: ASTM D 1644 9
  10. 10. BROOKFIELD VISCOSITY Definition: It is the measure of fluid friction which can be considered as the internal friction resulting when a layer of fluid is made to move in relationship to another layer. Viscosity is a measure of the ratio of shearing stress to rate of shear. • Test Method n. 3 Brookfield Viscosity 25°C • MU: mPa.s • Procedure: Obtain a 500 ml representative specimen of the liquid, bring to a constant temperature of 23± 2°C. Avoid the collection or formation of foam and skin. Depending on the expected viscosity range, attach an appropriate spindle to the viscometer. Insert the spindle into the specimen in the center of the container to the immersion mark and avoid entrapping air. Insert the thermometer probe into the specimen. Level the viscometer, start the motor, and observe thethermometer probe into the specimen. Level the viscometer, start the motor, and observe the display. Allow the viscometer to operate for at least 30 s after the display comes to a constant value. Report viscosity and temperature values. Remove and clean carefully the spindle used. Instruments: Brookfield Viscometer Mod. RDV- II+ for medium and high viscosities, or LVDVI+ for low viscosity (<100 cps). Beakers 600 ml. References: TAPPI T 666, ASTM D 1417, ASTM D 2196, CEN TC193 N 224 10
  11. 11. pH Definition: Measure of the acidity or alkalinity level of a solution. • pH > 7 alkaline solution • pH < 7 acidic solution • pH = 7 neutral solution • Test Method n. 8 pH • Procedure: From the set of standard buffer solutions, take the one closest to the expected pH value of the test sample, bring it to theclosest to the expected pH value of the test sample, bring it to the standard temperature (20-25°C), and set the pH meter to the exact pH value. Wash the glass electrode in the deionized water and dry it with filter paper. Place the electrode in the sample and measure the pH value. Remove the electrode, wash it carefully with deionized water and place it into the preserver solution. • Instruments: Glass electrode pH meter. Set of standard buffer solutions of known pH. Thermometer, graduated to 0,1°C. Glass beakers. • References: CEN EN WG1/56, ASTM E70
  12. 12. MELTING POINT • Definition: The temperature at which a solid becomes a liquid at a fixed pressure, usually standard pressure. For polymers, there is not an exact melting temperature, but a melting range. Test Method n. 5. Melting Range • MU: °C • Procedure: Take the sample used for the determination of residual• Procedure: Take the sample used for the determination of residual humidity, crush about 1 g of material in a mortar to grain size of about 0,1 mm. Then fill the substance into the capillary tube to about 5-10 mm by taking up the sample with tube and filling it up to the prescribed level by knocking (or dropping in a glass tube) the sealed end on a solid base. Introduce the filled capillary tube into the melting point apparatus and set the heating up at a rate of 6 °C/min. The change from solid to liquid state is visually observed and the melting start and end is noted. • Instruments: Melting point apparatus. Glass capillary tubes. Agate mortar and glass tube.
  13. 13. SOFTENINGPOINT Definition: the temperature or range of temperatures at which a substance softens without becoming liquid Test method n. 4. Softening Point, Ring & Ball • MU: °C • Procedure: Put the rings on a siliconed paper sheet and pour the melt product into each ring, trying to avoid air bubbles . Let the product cool and became solid, levelling the surface with a blade, then let at room temperature for 30 minutes. Put the rings on the structure and thetemperature for 30 minutes. Put the rings on the structure and the structure into the glycerol bath. The rings must be at 5 cm below the glycerol level Insert the thermometer in the bath, start stirring (speed 500 rpm) and heating. At 30 °C put the steel spheres in the middle of the rings and wait for some minutes (spheres conditioning). Then start heating (temperature gradient = 5 °C/min, check with a cronometer). Read the temperature when the spheres reach the bottom of the structure. • Instruments: Brass rings and structure for R&B measurement, 600cc becker filled with glycerol, Stirrer, Siliconed paper, blade • References: ASTM D36

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