Rolling Ball Tack Tester
Rolling Ball Tack Tester - ToronRBTT™ 3121
Adhesive Tack Tester (Rolling Ball Method)
ToronRBTT™ 3121 is a rolling ball tack tester that measures the initial tack of pressure-sensitive adhesives and tapes by the rolling-ball method. A steel ball rolls down an inclined ramp onto a horizontal adhesive surface, and the distance it travels before stopping gives a measure of tack. A shorter distance means a tackier surface.
The ToronRBTT™ 3121 uses an inclined plane with an adjustable angle from 0 to 90°, so the ramp can be set to suit different adhesives. A range of steel balls, from 1/32 inch to 1 inch, covers different tack levels. The method is simple, quick, and most appropriate for comparing low-tack adhesives.
The ToronRBTT™ 3121 (Adhesive Tack Tester, Rolling Ball Method) suits pressure-sensitive tape, label, and adhesive labs that check initial tack. The compact benchtop unit needs no power to run the test, and a set of steel balls and a storage box come with the instrument. It offers a repeatable way to rank the tack of coated adhesive surfaces.
Rolling Ball Tack Tester - ToronRBTT™ 3121 Applications
The ToronRBTT™ 3121 measures the initial tack of coated adhesive surfaces across tape and label production.
- Pressure-Sensitive Tapes: measures the initial tack of adhesive tapes for consistent grab.
- Self-Adhesive Labels: checks the tack of label adhesives before and during production.
- Low-Tack Adhesives: ranks the tack of low-tack and removable adhesives, where the method fits best.
- Adhesive Development: compares tack across adhesive formulations during development.
- Protective and Masking Films: measures the tack of protective films and masking tapes.
- Coating and Converting QC: verifies adhesive tack in coating and converting operations.
- Incoming Inspection: checks the tack of incoming adhesive materials against specification.
- Quality Control: ranks adhesive tack batch to batch for consistent performance.
Standards
The ToronRBTT™ 3121 is designed to align with internationally recognized standards for rolling-ball tack testing of pressure-sensitive adhesives.
- ASTM D3121 - Standard Test Method for Tack of Pressure-Sensitive Adhesives by Rolling Ball
- JIS Z0237 - Testing Methods of Pressure-Sensitive Adhesive Tapes and Sheets
Rolling Ball Tack Tester - ToronRBTT™ 3121 Key Features
The ToronRBTT™ 3121 uses a simple inclined-plane rolling-ball setup for fast, comparative tack testing.
- Rolling-Ball Method: measures initial tack from the distance a steel ball rolls across the adhesive.
- Adjustable Ramp Angle: the inclined plane sets from 0 to 90° to suit different adhesives.
- Range of Steel Balls: balls from 1/32 inch to 1 inch cover different tack levels.
- Best for Low-Tack Adhesives: the method is most appropriate for comparing low-tack surfaces.
- Wide Test Plate: a 130 mm plate with a 100 mm test width holds the adhesive strip.
- Simple Operation: the test is quick and needs no force measurement or power.
- Compact Benchtop Design: a light, compact frame fits any bench.
- Complete Ball Set: a set of steel balls, a storage box, and tweezers come with the instrument.
Theory and Method
Tack is the property that lets an adhesive grab a surface on light, brief contact. The rolling-ball method gives a simple, comparative measure of that initial grab. A clean steel ball is released from the top of an inclined ramp and rolls down onto a horizontal strip of the adhesive under test.
As the ball reaches the adhesive, the tack slows it down, and it comes to rest after a short distance. The distance the ball travels across the adhesive is the rolling-ball tack value. A tackier adhesive stops the ball sooner, giving a shorter distance, while a less tacky surface lets it roll farther.
The ramp angle sets the speed and energy the ball carries onto the adhesive, and a steeper ramp or a heavier ball suits higher-tack surfaces. Because the test is quick and needs no force measurement, it is well suited to ranking and comparing adhesives, and it works best on lower-tack materials.
Rolling Ball Tack Tester - ToronRBTT™ 3121 Technical Specifications
| Parameter | Specification |
|---|---|
| Adjustable Angle | 0 to 90° |
| Plate Width | 130 mm |
| Test Width | 100 mm |
| Ball Size | 1/32 inch to 1 inch |
| Dimensions | 372 mm (L) × 167 mm (W) × 90 mm (H) |
| Net Weight | 6 kg |
Standard Delivery
| Item | Description |
|---|---|
| Main Unit | Inclined-plane rolling-ball tack test stand |
| Steel Balls | Set of steel balls in graduated sizes |
| Steel Ball Box | Storage box for the steel balls |
| Tweezers | Tweezers for handling the balls |