GOTECH GT-7003-C Dart Impact Tester

Overview

The GOTECH GT-7003-C Dart Impact Tester is an engineered mechanical impact testing system designed for quantitative evaluation of the impact resistance and puncture toughness of rigid plastic films, sheets, laminates, and thin-walled packaging materials. Operating on the principle of free-fall impact energy transfer, the instrument delivers controlled kinetic energy to a standardized dart (typically 38 mm diameter hemispherical tip per ASTM D1709 or ISO 7765-1) dropped from a precisely adjustable vertical height onto a horizontally clamped specimen. The test determines either the critical impact energy required to cause failure (e.g., puncture or tear) or the pass/fail threshold at a specified drop height—enabling comparative assessment of material robustness under simulated shipping, handling, or consumer-use drop conditions.

Key Features

• Adjustable drop height range from 0.5 m to 2.0 m (standard configuration), calibrated with traceable linear scale and digital height indicator for ±1 mm repeatability.
• Stainless steel guiding column with low-friction linear bearing ensures vertical alignment and minimizes lateral deviation during free fall (<0.5° angular deviation).
• Dart assembly complies with ASTM D1709 Method A (38 mm hemispherical tip, 50 g mass) and supports optional dart configurations (e.g., 100 g, conical tips) for extended material characterization.
• Specimen clamping mechanism utilizes pneumatic or manual dual-clamp design to secure samples up to 200 mm × 200 mm without edge deformation or slippage.
• Integrated safety interlock system halts operation if chamber door is open or if dart release mechanism is improperly engaged—meeting CE machinery directive requirements (2006/42/EC).
• Robust structural frame constructed from powder-coated carbon steel with vibration-dampening base plate for stable operation in shared laboratory or QC environments.

Sample Compatibility & Compliance

The GT-7003-C accommodates flat, non-porous specimens with thicknesses between 0.025 mm and 3.0 mm, including polyethylene (LDPE, HDPE), polypropylene (BOPP), PET, PVC, and coextruded barrier films. It is routinely employed in quality assurance workflows aligned with ASTM D1709 (Standard Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method), ISO 7765-1 (Plastics — Film and Sheeting — Determination of Impact Resistance — Part 1: Free-Falling Dart Method, Type A), and GB/T 9639.1–2008 (Chinese national standard equivalent). Data generated supports GLP-compliant documentation when paired with validated procedural SOPs and operator training records.

Software & Data Management

While the GT-7003-C operates as a stand-alone mechanical tester, optional digital upgrade kits enable integration with PC-based data acquisition modules. These modules record drop height, dart mass, specimen identification, pass/fail outcome, and timestamp via USB or RS-232 interface. Exported CSV files are compatible with LIMS platforms and support audit trails compliant with FDA 21 CFR Part 11 when deployed with electronic signature-enabled software (e.g., GOTECH LabSuite v3.2, sold separately). Manual operation remains fully functional without software dependency—ensuring continuity during IT infrastructure maintenance.

Applications

• Pre-shipment validation of flexible packaging integrity for food, pharmaceutical, and consumer electronics industries.
• Comparative evaluation of resin formulations during polymer R&D—assessing effects of additives (e.g., impact modifiers, UV stabilizers) on film toughness.
• Process qualification of extrusion, calendering, or blow molding lines—monitoring consistency of impact performance across production batches.
• Root cause analysis of field failures attributed to transit damage, supporting corrective action reports (CARs) and FMEA updates.
• Educational use in materials science laboratories for teaching fundamental concepts of energy absorption, brittle-to-ductile transition, and strain-rate-dependent fracture behavior.

FAQ

What standards does the GT-7003-C comply with?
ASTM D1709, ISO 7765-1, and GB/T 9639.1–2008. Custom calibration certificates traceable to NIM (National Institute of Metrology, China) are available upon request.
Can the instrument be used for testing corrugated board or rigid containers?
No—the GT-7003-C is optimized for thin, flexible films and sheets. For rigid packaging, GOTECH offers complementary systems such as the GT-7007-A Compression Tester or GT-7010-B Edge Crush Tester.
Is third-party calibration service available?
Yes. GOTECH provides annual calibration services with certified uncertainty statements, and supports customer-performed verification using NIST-traceable height gauges and certified dart masses.
Does the unit require compressed air or external power beyond standard AC supply?
Pneumatic clamping models require 0.4–0.6 MPa clean, dry air; manual clamp variants operate without auxiliary utilities. All versions use 100–240 VAC, 50/60 Hz single-phase input.
How is specimen failure defined during testing?
Failure is defined as complete penetration (dart passes through) or formation of a visible tear ≥2 mm in length extending from the impact point—per criteria specified in the applicable test standard and documented in the test report.