Water-based acrylic adhesive tape testing service

Water-Based Acrylic Adhesive Tape Testing Service – Comprehensive Performance and Reliability Validation for Brazilian Packaging, Construction and Industrial Applications

As an ISO/IEC 17025 accredited independent testing laboratory, we offer comprehensive testing services for water‑based acrylic adhesive tapes used across Brazilian packaging, construction, automotive, electrical, medical, and general industrial sectors. Water‑based acrylic pressure‑sensitive adhesives (PSAs) are increasingly favoured for their low VOC emissions, environmental compatibility, and excellent balance of tack, peel adhesion, and shear holding power. Our test protocols evaluate adhesive performance under various conditions, including temperature, humidity, ageing, and chemical exposure, using internationally recognised methods aligned with ABNT NBR standards, ASTM D3652 (Thickness), ASTM D3654 (Holding Power), ASTM D3330 (Peel Adhesion), ASTM D2979 (Tack), ASTM D3759 (Elongation), ISO 29862 (Peel adhesion), ISO 29863 (Shear adhesion), and PSTC (Pressure Sensitive Tape Council) test methods. Our reports are recognised by INMETRO (product certification), ABNT (technical compliance), ANVISA (medical device and food contact approvals), and major Brazilian manufacturers and converters for supplier qualification, quality assurance, and new product development.

Types of Water‑Based Acrylic Adhesive Tapes We Regularly Test

Our laboratory accommodates a wide variety of tape constructions, backing materials, and adhesive formulations. Typical test specimens include:

• Packaging tapes – carton sealing tapes, strapping tapes, and reinforced filament tapes
• Masking and painting tapes – crepe paper masking, flatback, and surface protection films
• Double‑sided tapes – tissue‑based, film‑based, and foam‑based transfer tapes
• Industrial mounting tapes – acrylic foam tapes for bonding and mounting applications
• Electrical and thermal insulation tapes – for wire harnessing and component fixing
• Medical and hygiene tapes – surgical tapes, wound dressings, and ostomy application tapes
• Label and graphic film tapes – with printable surfaces for signage and promotional use
• Specialty tapes – removable, repositionable, UV‑stable, and high‑temperature resistant grades

Physical and Dimensional Properties – Thickness, Width, Length and Weight

• Total tape thickness measurement (ASTM D3652 / PSTC‑33) – We measure the total thickness of the tape (backing + adhesive) using a calibrated dead‑weight thickness gauge with a 4.8 mm diameter foot and a 25 kPa dead‑load. The thickness is measured at five points across the tape width and at three locations along the length, and the average, standard deviation, and coefficient of variation are reported. A thickness variation exceeding ±5 % from the nominal value is flagged as a potential coating uniformity issue for Brazilian packaging tape applications.
• Adhesive thickness determination (by differential measurement) – The adhesive layer thickness is calculated by subtracting the backing thickness (measured after carefully removing the adhesive with a solvent) from the total thickness. We report the adhesive thickness, which directly correlates with peel adhesion and tack.
• Width measurement (ASTM D3652 / ISO 29862) – We measure the tape width at three points along a 1‑metre length using a calibrated steel rule (accuracy ±0.5 mm). The average width and the minimum width are reported. Any width below the stated nominal width (e.g., 48 mm vs. 50 mm) is noted, as it may affect the sealing performance on Brazilian cartons.
• Length verification (unwind test) – We unwind the entire tape roll on a calibrated length‑measuring machine to verify the total length. A variation of more than ±2 % from the declared length is reported, which is essential for commercial weight and cost calculations in Brazilian packaging operations.
• Grammage (weight per unit area) – ISO 536 / TAPPI T410 – For label and medical tapes, we measure the mass per unit area (g/m²) by cutting a 100×100 mm specimen and weighing it on an analytical balance (accuracy ±0.001 g). The grammage is used to estimate the raw material cost and to verify the coating weight consistency.

Adhesive Performance – Peel Adhesion, Tack and Shear Strength

• Peel adhesion – 180° test (ASTM D3330 Method A / ISO 29862 / PSTC‑101) – We apply the tape to a standard stainless steel plate (or other specified substrate, e.g., glass, HDPE, or cardboard) using a 2‑kg rubber‑covered roller, and then peel the tape at a 180° angle at a speed of 300 mm/min. The peel force (in N/25mm) is recorded at 10‑second intervals over a 100 mm peel length, and the average force is reported. A low peel adhesion (e.g., < 3 N/25mm) indicates a low‑tack tape, while a high value (> 10 N/25mm) indicates a strong‑bond tape suitable for heavy‑duty packaging.
• Peel adhesion at different dwell times (immediate, 24‑hour, 72‑hour) – We test the peel adhesion at three dwell times (1 minute, 24 hours, and 72 hours) to assess the building of adhesive contact over time. The ratio of the 24‑hour peel to the immediate peel is reported as the “wetting factor”. A low wetting factor (e.g., < 1.2) indicates a quick‑bonding adhesive, which is desirable for Brazilian high‑speed automated packaging lines.
• Quick stick (tack) – Loop tack or rolling ball tack (ASTM D6195 / ASTM D3121 / PSTC‑6) – For loop tack, we form the tape into a loop (adhesive side out), press it against a glass plate with a defined force, and measure the peak force required to separate the loop from the plate. For rolling ball tack, we release a steel ball of a specified diameter onto a sloped runway and measure the distance it rolls before stopping. A short rolling distance (e.g., < 50 mm) indicates a high tack. The results are reported as “very high,” “high,” “medium,” or “low” tack, which is essential for selecting tapes for Brazilian manual and automatic applicators.
• Shear adhesion (holding power) – static shear at elevated temperature (ASTM D3654 / PSTC‑107 / ISO 29863) – We apply the tape to a stainless steel plate with a 25×25 mm overlap, roll it down with a 2‑kg roller, and hang a 1‑kg weight from the free end. The test is performed at 23 °C and at 40 °C, and the time to failure (minutes) is recorded. A tape with a static shear time of more than 10,000 minutes at 23 °C is considered high‑performance, suitable for Brazilian automotive and mounting applications.
• Dynamic shear (friction shear) test (ASTM D1002 adapted) – We apply a tensile force at a crosshead speed of 1 mm/min to a joint formed by two plates bonded with the tape (25×25 mm overlap). The maximum shear force (in N or MPa) and the mode of failure (adhesive, cohesive, or substrate failure) are recorded. This test is particularly relevant for Brazilian structural bonding applications.

Environmental and Ageing Resistance – Temperature, Humidity, UV and Chemical Exposure

• Heat resistance (sustained temperature exposure) – ASTM D3655 / ISO 29864 – We condition tape‑to‑steel laminated specimens in an oven at 70 °C (or 100 °C for high‑temperature grades) for 168 hours. After conditioning, we measure the peel adhesion and shear holding power. The percentage retention is calculated; a retention below 80 % indicates that the acrylic adhesive has degraded or cross‑linked excessively. This is critical for Brazilian construction and transportation applications.
• Humidity ageing (simulating tropical climate) – ASTM D3833 / ISO 4611 – We place tapes (on steel and cardboard substrates) in a humidity chamber at 40 °C and 95 % RH for 168 hours, then test the peel adhesion and the visual appearance (blistering, whitening, adhesive transfer). The results are compared to non‑aged specimens; a drop of > 30 % in peel adhesion is considered a failure for Brazilian coastal and interior humid climates.
• UV weathering and lightfastness – ASTM G154 / ISO 4892‑3 – For tapes used in outdoor signage, windows, and automotive exterior applications, we expose specimens to UVA‑340 lamps (0.89 W/m², 60 °C, dry/condensation cycles) for 500 and 1,000 hours. We then evaluate the change in peel adhesion, visual discolouration, and any embrittlement of the backing. A peel retention below 70 % or a colour change (ΔE*) > 3.0 is reported, which is important for Brazilian architectural and advertising applications.
• Chemical resistance – solvent, acid, alkali and oil resistance (ASTM D543 / ISO 175) – We immerse tape‑covered panels in common solvents (ethanol, isopropanol, hexane), detergents (5 % solution), acid (5 % acetic acid), and alkali (5 % sodium hydroxide) for 24 hours. The adhesion and visual appearance are assessed. The results are rated as “excellent”, “good”, “fair”, or “poor” based on the degree of softening, swelling, or delamination. This is essential for Brazilian industrial tapes used in chemical plants and automotive workshops.

Adhesive Coating and Backing Properties – Release, Unwind and Adhesive Transfer

• Unwind force (adhesion to release liner) – ASTM D3811 / PSTC‑8 – We mount the tape roll on a test fixture that measures the force required to unwind the tape at a speed of 300 mm/min. The maximum and average unwind forces are reported. A high unwind force (> 10 N/25mm) can lead to problems in high‑speed Brazilian packaging lines, causing breakage and re‑work.
• Low‑temperature unwind (5 °C and 0 °C) – We condition the tape roll at 5 °C and 0 °C for 4 hours and then measure the unwind force. A significant increase in unwind force (e.g., > 100 % from 23 °C) is reported, as this can cause liner breakage in cold‑storage Brazilian facilities.
• Adhesive transfer (residue test) – PSTC‑16 / ASTM D3653 – We apply the tape to a standard test panel (stainless steel, glass, painted surface), peel it off after 24 hours, and inspect the panel for any adhesive residue. The residue is rated as “none”, “slight”, “moderate”, or “heavy”. A “heavy” residue is considered a failure for removable tapes used in Brazilian protective masking applications.
• Release liner peel force (liner release) – ASTM D3330 Method F – For transfer tapes and double‑sided tapes, we measure the force required to peel the release liner from the adhesive at an angle of 180°. The result is expressed in g/25mm. A release force that is too high (> 150 g/25mm) makes the tape difficult to apply manually; too low (< 20 g/25mm) may cause premature release during storage and transit.

Specialised Tests – Medical, Electrical and High‑Temperature Grades

• Medical tape skin adhesion test (ASTM F2225 / ISO 10993 adapted) – For surgical and medical tapes, we measure the peel adhesion from a synthetic skin substrate (or from a standard medical plate) at a speed of 300 mm/min, after a 30‑minute dwell. The maximum peel force and the pain‑free removal rating are reported. We also evaluate the residue after removal; any visible residue on the substrate is flagged.
• Electrical insulation and dielectric strength (ASTM D149 / IEC 60243‑1) – For electrical tapes, we measure the dielectric breakdown voltage (in kV) and the volume resistivity (in Ω·cm) before and after humidity conditioning (40 °C, 93 % RH, 168 hours). A dielectric strength of < 1,000 V/mil is considered unacceptable for Brazilian 220‑V and 380‑V wiring applications.
• Flame retardancy – UL 94 VTM‑0 / ABNT NBR 15123 – For tapes used in electrical and electronic equipment, we perform a vertical flame test on tape specimens (wrapped around a mandrel). The afterflame time and the ability to self‑extinguish are recorded. A UL 94 VTM‑0 or VTM‑1 rating is typically required for Brazilian electrical and telecommunications products.
• Outgassing and low‑VOC determination (ISO 16000‑6 / EPA 5021) – For tapes used in controlled environments (hospitals, laboratories, cleanrooms), we quantify the total volatile organic compound (VOC) emissions (in µg/g or µg/m²·h) using GC‑MS. A VOC level below 50 µg/g is considered acceptable for Brazilian healthcare and food‑processing facilities.

Report Acceptance & Compliance with Brazilian Packaging, Medical and Industrial Standards

All water‑based acrylic adhesive tape tests described above are conducted under our ISO/IEC 17025:2017 accreditation, using calibrated thickness gauges, peel testers, shear racks, environmental chambers, and analytical instruments, all traceable to INMETRO and international standards. Our final test reports include: a detailed description of the tape construction and test conditions, raw data tables (peel, tack, shear, thickness, etc.), calculated averages and standard deviations, ageing and environmental retention percentages, photographic evidence of any failure modes (residue, blistering, adhesive transfer), and a clear pass/fail verdict against your specified acceptance criteria (e.g., ASTM D3330 peel adhesion > 5 N/25mm at 24 hours). We also provide an expanded uncertainty (k=2) for key measured parameters. These reports are widely accepted by INMETRO for product certification of packaging, electrical and medical tapes, by ABNT for normative compliance, by ANVISA for medical device and food contact approvals, and by Brazilian tape converters, packaging houses, and automotive OEMs for quality assurance, supplier qualification, and new product development. Bilingual (Portuguese/English) versions are available to facilitate submissions to regulatory bodies and communication with your engineering, procurement and quality teams. With our rigorous and comprehensive testing service, you can confidently validate the performance, reliability and safety of your water‑based acrylic adhesive tapes, ensuring they meet the demanding requirements of the Brazilian market.