GBPI GBD-L – Falling Dart Impact Tester (ASTM D1709 Method A & B)
- Precision laboratory falling dart impact tester for plastic films, sheets, and laminated barrier foils
- Full testing compliance with ASTM D1709 (Methods A & B), ISO 7765-1, JIS K7124, and GB/T 9639
- Supports drop heights of 0.66 m ± 10 mm (Method A) and 1.50 m ± 10 mm (Method B)
- Automated pneumatic specimen clamping ring eliminating film slippage and operator-induced tension bias
- Electromagnetic dart suspension and instant release mechanism with foot-pedal activation switch
- Complete modular dart weight set with precision increment weights from 50 g to 2000 g
- Integrated microcomputer computing 50% failure mass (F50 value) and standard deviation automatically
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The GBPI GBD-L is a high-precision free-falling falling dart impact tester engineered to determine the mechanical impact failure resistance, puncture toughness, and energy absorption properties of plastic films, composite laminates, sheets, and heavy-duty packaging webs. Manufactured in strict conformity with premier international packaging standards including ASTM D1709 (standard test methods for impact resistance of plastic film by the free-falling dart method), ISO 7765-1, JIS K7124, and GB/T 9639, this instrument serves as the benchmark quality control apparatus for blown film extrusion and industrial pouch conversion.
During transportation, shipping drop shocks, and automated high-speed bagging operations, flexible packages undergo abrupt localized mechanical impacts. Inadequate film impact strength causes catastrophic bag ruptures, puncture pinholes, and product leakage. Operating as a standardized falling dart impact tester, the GBD-L clamps a circular test specimen tautly within an annular pneumatic ring and releases a hemispherical-headed missile from a specified height onto the specimen center. Utilizing the standardized staircase testing technique, the system systematically alters dart loading mass based on individual strike outcomes to accurately derive the 50% impact failure mass.
Dual Method A & B Capabilities
The testing column accommodates both standardized testing methodologies seamlessly. Method A employs a 38.1 mm diameter hemispherical phenolic or composite dart dropped from a height of 0.66 meters for lightweight polyethylene and polypropylene films. Method B utilizes a 50.8 mm diameter stainless steel dart head released from a height of 1.50 meters, accommodating tough agricultural geomembranes, barrier laminates, and heavy-duty shipping sacks.
Pneumatic Clamping & Electromagnetic Release
To ensure flawless test reproducibility, the GBD-L features pneumatic clamping jaws controlled via an ergonomic foot pedal, delivering uniform circumferential grip without surface slippage or edge stress concentrations. An electro-magnetic release chuck holds the dart securely without mechanical friction, guaranteeing a clean, vertical trajectory upon triggering.
Widely adopted by petrochemical polyolefin resin manufacturers, flexible packaging converters, agricultural film suppliers, and third-party testing laboratories, the GBD-L delivers reliable, objective puncture resistance verification for demanding packaging applications.
GBPI GBD-L Falling Dart Impact Tester – Technical Specifications
| Technical Parameter | Specification Details |
|---|---|
| Test Principle | Free-Falling Hemispherical Dart Staircase (50% Impact Failure Mass F50) |
| Applicable Standards | ASTM D1709 (Method A & B), ISO 7765-1, JIS K7124, GB/T 9639.1 |
| Testing Methods | Method A (0.66 m Drop Height) & Method B (1.50 m Drop Height) |
| Dart Head Diameter | Method A: Φ38.1 ± 0.13 mm | Method B: Φ50.8 ± 0.13 mm |
| Impact Mass Range | Method A: 50 g to 2000 g | Method B: 300 g to 2000 g (Accuracy: 1 g) |
| Dart Release Mechanism | Electromagnetic Suspension Chuck with Instant Zero-Friction Release |
| Specimen Clamping System | Pneumatic Annular Clamp (Inner Diameter: 125 ± 2 mm) with Foot Pedal |
| Pneumatic Supply Pressure | 0.6 MPa (Clean Dry Compressed Air) |
| Specimen Dimensions | > 150 mm × 150 mm or Circular Discs > Φ150 mm |
| Instrument Dimensions | Method A: 500 mm (L) × 450 mm (W) × 1320 mm (H) Method B: 500 mm (L) × 450 mm (W) × 2160 mm (H) |
| Instrument Net Weight | Approximately 70 kg |
| Power Supply | AC 220V ± 10%, 50 Hz / 60 Hz Single Phase |
Key Performance Features of the GBPI GBD-L
- Dual Standard Method A & B Flexibility: Easily converts between Method A (0.66 m drop height) and Method B (1.50 m drop height) using quick-mount modular guide columns and matched dart assemblies.
- Zero-Friction Electromagnetic Release: Eliminates mechanical trigger drag and tilt, ensuring true free-fall trajectory and repeatable perpendicular dart impacts on the specimen center.
- Uniform Pneumatic Annular Clamping: Heavy-duty pneumatic cylinder clamping ring applies constant circumferential gripping force, preventing sample creasing, distortion, or edge slippage.
- Ergonomic Foot-Pedal Control: Hands-free sample clamping operation allows the operator to accurately align and tension thin, delicate film samples prior to test execution.
- Automated Statistical Analysis: On-board digital processing unit automatically tracks pass/fail tallies, calculates delta mass increments, and computes 50% failure energy (F50) with standard deviation.
- Durable Aluminum Alloy Structural Column: Precision-extruded structural alloy tower with etched height graduation scales provides rigid alignment and resistance to laboratory wear.
Standard Package & Accessories
| Item | Description | Quantity | Type |
|---|---|---|---|
| 1 | GBD-L Falling Dart Impact Tester Base Mainframe with Control Panel | 1 Set | Standard |
| 2 | Method A Guided Fall Tube & Structural Extension Column (0.66 m) | 1 Set | Standard |
| 3 | Method A Hemispherical Dart Head (Φ38.1 mm) & Modular Weight Set | 1 Set | Standard |
| 4 | Pneumatic Specimen Clamping Assembly & Foot-Pedal Actuator | 1 Set | Standard |
| 5 | Electromagnetic Dart Release Mechanism with Safety Cushion | 1 Set | Standard |
| 6 | Method B Column Extension (1.50 m) with Φ50.8 mm Dart Assembly | 1 Set | Optional |
| 7 | Factory Calibration Certificate and User Instruction Manual | 1 Set | Standard |
Primary Testing Applications
Polyethylene & Polyolefin Blown Films
Puncture and impact resistance verification for LDPE, LLDPE, HDPE, and metallocene polyethylene films used in commercial food packaging and shrink wrap.
Heavy-Duty Shipping Sacks & Geomembranes
Method B high-energy impact qualification for industrial fertilizer bags, resin pellet valve sacks, agricultural mulch sheets, and civil landfill liners.
Flexible Packaging Laminates & Pouches
Impact screening for multi-layer coextruded and adhesive laminates (PET/PE, OPA/PE, PET/Alu/PE) utilized in frozen food, retort, and liquid packaging.
Polymer Resin R&D & Film Formulation
Comparative impact evaluation for polymer resin producers optimizing melt flow index, co-monomer content, and blending formulations.