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Pendulum Impact Tester - Electronic
STD-B Flexible Packaging Impact Tester
Focusing on packaging and material testing technology, we are committed to quality control in industries such as healthcare, pharmaceuticals, food, packaging, textiles, and new materials. Our products are widely used in enterprises, testing institutions, universities, and research institutes.
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- Commodity name: Pendulum Impact Tester - Electronic
STD-B Flexible Packaging Impact Tester
Pendulum Impact Tester for Plastic Films — ASTM D3420 & ISO 7765 Compliant
Overview
The LabStone Pendulum Impact Tester is a precision laboratory instrument designed to measure the impact resistance of plastic films, thin sheets, and flexible laminates. Using a calibrated pendulum arm with a hemispherical punch, the instrument determines the energy absorbed when a specimen ruptures under sudden impact — a key indicator of material toughness and resistance to handling damage.Widely trusted in flexible packaging, pharmaceutical films, food packaging, and industrial materials testing, this instrument delivers fast, repeatable results with minimal operator intervention.Key Functions
Determine impact energy absorption (in Joules) of single‑layer and multi‑layer filmsEvaluate toughness and ductile‑brittle transition behavior under impact loadingSupport quality control, incoming inspection, and R&D formulation for film manufacturers and convertersProvide rapid single‑specimen testing — no statistical stair‑case sequences requiredTest Principle
The pendulum arm is raised to a fixed starting angle and secured by a pneumatic latch. The film specimen is clamped between two annular rings with O‑ring cushioning. Upon release, the pendulum swings downward, converting potential energy into kinetic energy. A hemispherical punch strikes and penetrates the specimen. After rupture, the pendulum continues its upward swing. A high‑resolution photoelectric encoder records the return angle. The difference between initial potential energy and residual energy (derived from the angle change) equals the impact energy absorbed by the specimen.Compliant Standards
ASTM D3420 – 16(2021) — Standard Test Method for Impact Resistance of Plastic Film by the Free‑Falling Dart Method(pendulum adaptation)ISO 7765‑1:1988 — Plastics — Film and sheeting — Determination of impact resistance by the free‑falling dart method — Part 1: Staircase methodISO 7765‑2:1994 — Part 2: Instrumented puncture test(reference for energy calculation principles)GB/T 8809‑2015 — Plastics — Film and sheeting — Determination of impact resistance(equivalent to international methods)Key Features
Ultra‑High Resolution: Photoelectric encoder with 0.001 J energy resolution captures even minute energy differences — essential for thin, high‑barrier films.Fully Automatic Workflow: Pneumatic specimen clamping, pneumatic pendulum release, and automatic angle measurement. Zero manual intervention from clamp to result.Multi‑Range Design: Three selectable energy ranges — 1 J, 2 J, and 3 J — covering brittle mono‑layers to tough multi‑layer laminates.Precision Calibration: Built‑in centroid adjustment, bubble leveling, and rotational friction compensation ensure long‑term measurement accuracy.Dual‑Mode Operation: Standalone operation via the host controller with micro‑printer, or PC‑connected mode with professional software for database management, curve analysis, and customizable report generation.Quick‑Change Tooling: Interchangeable impact heads (Type A: 25.4 mm / Type B: 19 mm) and dual clamp diameters (Φ89 mm / Φ60 mm) adapt to diverse specimen geometries.Technical Specifications
Maximum Impact Energy: 1 J / 2 J / 3 J (via interchangeable weights)Energy Resolution: 0.001 JImpact Head Configurations:Type A: Φ25.4 mm diameter, SR12.7 mm radiusType B: Φ19 mm diameter, SR12.7 mm radiusClamp Diameters: Φ89 mm and Φ60 mm (both included with O‑rings)Clamping Mode: PneumaticPendulum Release: Pneumatic boltMinimum Specimen Size: 100 mm × 100 mmGas Supply Required: 0.6 MPa (user‑provided), Φ6 mm polyurethane tubingOverall Dimensions: 630 × 345 × 635 mm (L×B×H)Net Weight: 60 kgPower Supply: AC 220/110V, 50/60 HzStandard Configuration：
Main testing machine (host unit)1 J base pendulum assembly2 J supplementary weight3 J supplementary weightType A impact head (Φ25.4 mm / SR12.7 mm)Type B impact head (Φ19 mm / SR12.7 mm)Pair of Φ89 mm test clamps (with O‑ring)Pair of Φ60 mm test clamps (with O‑ring)Micro thermal printerProfessional PC softwareOperation manual and calibration certificateApplication Industries & Scenarios
Flexible Packaging & Converting
Snack Food Laminates (BOPP / BOPET / CPP): Verify impact toughness after metallization or coating.Stand‑Up Pouches: Test seal‑area film resilience against drop impact during filling and distribution.Shrink Sleeves & Labels: Evaluate tear‑propagation resistance under sudden stretching forces.Pharmaceutical & Medical Films
Blister Pack Forming Films (PVC / PVDC / PET‑PE): Ensure thermoformed cavities withstand automated filling line impacts.Transdermal Patch Release Liners: Validate backing film puncture resistance.Sterile Pouches (Tyvek® / Film): Confirm impact integrity for medical device packaging.Food & Beverage Packaging
Frozen Food Bags (LLDPE / mLLDPE): Test low‑temperature impact resistance at −18 °C storage conditions.Liquid Pouch Films: Evaluate burst resistance for aseptic brick‑pack structures.Vacuum Skin Packaging: Assess film stretch‑impact behavior around sharp‑edged proteins.Industrial & Specialty Films
Electrical Insulation (PET / PI films): Measure impact toughness for capacitor and motor winding applications.Agricultural Mulch Films: Simulate hail‑impact resistance in greenhouse covers.Geomembranes (HDPE / LLDPE): Assess puncture resistance during installation.R&D and Third‑Party Testing
New Resin Development: Compare impact modifiers (EVA, POE, elastomers) in polyethylene formulations.Accelerated Aging Studies: Correlate UV‑exposure time with retained impact energy.CNAS / ISO 17025 Accredited Labs: Issue globally accepted test reports referencing ASTM D3420 or ISO 7765.Frequently Asked Questions (FAQ)
Q1: What is the difference between pendulum impact and free‑fall dart (FDD) testing?A: Pendulum impact uses a swinging arm with a hemispherical punch to strike a clamped specimen — it measures absorbed energy from a single specimen in seconds. Free‑fall dart drops a weighted projectile from a fixed height and requires 20–30 specimens using a statistical staircase method (Bruceton) to determine 50 % failure mass. Pendulum testing is faster for QC screening; FDD provides a statistically robust failure probability curve. Many labs use both: pendulum for routine checks, FDD for final certification.Q2: Which ASTM or ISO standard should I reference for pendulum impact?A: The primary reference is ASTM D3420‑16(2021). For international work, ISO 7765‑1:1988 provides the foundational methodology. Always confirm with your customer or regulatory body which standard their specification calls out.Q3: How do I select the correct energy range (1J, 2J, or 3J)?A: Aim for the specimen to absorb 10–80 % of the selected range. For thin, brittle films (e.g., 12 µm PET), use 1 J. For standard packaging films (50–100 µm LDPE), 2 J is typical. For heavy‑duty laminates or co‑extruded structures, use 3 J. Starting too high will give poor resolution; starting too low may not rupture the film.Q4: Why does the clamp use an O‑ring?A: The O‑ring provides uniform, cushioned pressure around the specimen circumference. This prevents slippage during impact while avoiding crushing or pre‑stressing the film. Without it, energy readings would be artificially high due to friction losses at the clamp.Q5: Can this instrument test rigid plastic sheets?A: This tester is optimized for flexible films and thin sheets (typically ≤0.25 mm). For rigid plastics, an Izod or Charpy pendulum impact tester with notched specimens is the appropriate choice per ASTM D256 or ISO 179.Q6: How is impact energy calculated from the swing angle?A: The system uses the formula: Energy Absorbed = m × g × L × (cos θ₂ − cos θ₁), where mis pendulum mass, gis gravity, Lis pendulum length, θ₁is the release angle, and θ₂is the return angle. The photoelectric encoder measures both angles with 0.001 J resolution, and the embedded processor performs the calculation automatically.Q7: What compressed air supply is needed?A: The pneumatic clamp and release mechanism require 0.6 MPa (87 psi) clean, dry compressed air. Connection is made via a standard Φ6 mm polyurethane tube. An in‑line filter‑regulator is recommended to prevent moisture from entering the pneumatic system. -
Function：
Determination of the anti pendulum impact properties of plastic film, sheet, and composite film.
Principle：
The pendulum body is lifted to a fixed height; then release the pendulum body by a Pneumatic bolt, and let the swing downward freely. The potential energy is converted into kinetic energy. Hemispherical punch impact test specimen. A high-resolution photoelectric encoder records the angle of pendulum rotation. The angle of pointer rotation indicates the energy loss when the pendulum impacts the specimen, i.e. the impact resistance of the specimen.
Standards：GB8809-2015，ASTEMD3420-95。
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Characteristics
- High precision：High resolution photoelectric encoder, precise measurement of the pendulum rotation angle.
- Fully automatic：Pneumatic sample clamping, pendulum automatic release, angle automatic measurement, impact energy automatic calculation.
- Precise adjustment：Pendulum centroid adjustment, horizontal adjustment, rotation friction compensation.
- Range adjustable：Multi range design, support large range measurement.
- Dual control of host computer and computer software：Graphical operation, the use of database management test data, convenient query, and report printing.
- High precision：High resolution photoelectric encoder, precise measurement of the pendulum rotation angle.
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Specification:
- Maximum impact energy： 1 J；2 J；3 J（normal）.
- Energy resolution： 0.001 J.
- Impact head size： SR12.7 mm-25.4(A)；R12.7-19 (B).
- Specimen clamp diameter： Φ89 mm；Φ60 mm.
- Specimen clamp mode： Pneumatic.
- Swing release mode： Pneumatic.
- Size of specimen： 100 mm × 100 mm.
- Gas pressure： 0.6 MPa （Gas source provided by users）.
- Gas connector： Ф6 mm Polyurethane pipe.
- Size： 630×345×635(mm) (L×B×H).
- Power supply: AC220/110V 50/60Hz.
- Net weight: 60Kg.
- Maximum impact energy： 1 J；2 J；3 J（normal）.
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Configuration：
Principle machine，1J basic swing，2J weight, 3J weight，Ф25.4mm-SR12.7(type A) standard impact head，Ф19mm-SR12.7(Type B) standard impact head，a pair of Ф89mm Standard Test splint （include an O-ring）, a pair of Ф60mm Standard Test splint（include an O-ring）,micro printer, professional computer software.
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