Beijing North Guang Precision Instruments BWN Series Universal Testing Machine for Plastic Film and Polymer Materials

Overview

The Beijing North Guang Precision Instruments BWN Series Universal Testing Machine is an electromechanical static testing system engineered for high-reproducibility mechanical property characterization of polymeric films, elastomers, composites, and metallic/non-metallic specimens. Based on servo-controlled linear motion architecture and precision load cell transduction (±0.5% full-scale accuracy), it performs uniaxial tensile, compression, flexural, peel (90°/180°), tear, shear, and puncture tests in strict accordance with international standard methodologies—including ISO, ASTM, GB/T, DIN, and JIS protocols. Its modular force measurement system (0–10 kN configurable range), 24-bit A/D resolution (1/100,000 full scale), and closed-loop pulse-command speed control (0.01–500 mm/min) ensure traceable, repeatable data acquisition across diverse material classes—from sub-millimeter-thick plastic films to structural metal components. Designed for laboratory and QC environments requiring GLP-compliant documentation, the system supports audit-ready test execution and result archiving.

Key Features

• High-accuracy dual-range load measurement: 0–10 kN capacity with automatic 7-segment range switching and ±0.5% FS linearity per ISO 7500-1 Class 1 calibration.
• Precision displacement sensing: 2500 P/R optical encoder with 0.001 mm resolution and ±0.5% accuracy; LINE DRIVE interface ensures immunity to electromagnetic interference.
• Adaptive crosshead drive: Servo-motor + precision ball screw assembly enables ultra-low-speed testing (0.01 mm/min) and rapid positioning (500 mm/min), with coarse/fine adjustment modes.
• Integrated safety architecture: Dual-limit mechanical travel stops, overload emergency shutdown, leakage current protection, automatic return-to-origin, and programmable break-point halt.
• Modular fixture compatibility: Standard 350 mm test width and 950 mm vertical travel accommodate ASTM D882 film grips, pneumatic clamps, peel fixtures, bending jigs, and custom tooling per ISO 20795-2 or GB/T 2792.

Sample Compatibility & Compliance

The BWN Series accommodates a broad spectrum of specimen geometries and mechanical behaviors: isotropic thermoplastics (e.g., PET, PE, PP films), anisotropic composites (carbon fiber laminates), viscoelastic elastomers (silicone, natural rubber), fibrous textiles, biomedical polymers (PCL, PLA sutures), and metallic foils (aluminum, copper). All test configurations comply with mandatory mechanical testing standards including ASTM D882 (tensile properties of thin plastic sheeting), ISO 1184 (tensile testing of plastics), GB/T 1040.3 (plastics—tensile testing—film and sheet), and EN ISO 1798 (flexible cellular polymeric materials). The system’s hardware and software architecture support full traceability required under ISO/IEC 17025 accredited laboratories and FDA 21 CFR Part 11–compliant electronic records when paired with optional audit-trail-enabled software modules.

Software & Data Management

The UTM107 Windows-based control and analysis platform delivers full compliance with regulatory data integrity requirements. It features:

• Standardized test method library: Pre-configured templates for >400 test standards (GB, ASTM, ISO, DIN, JIS, BS), editable via intuitive GUI without scripting.
• Multi-language interface: Real-time switching between Simplified Chinese, Traditional Chinese, and English.
• Dynamic unit management: Automatic conversion among force units (N, kN, kgf, lbf) and displacement units (mm, cm, inch) with user-defined decimal precision.
• Real-time visualization: Auto-scaled stress–strain, load–displacement, load–time, and multi-curve overlay plots; live switching during active test execution.
• Comprehensive reporting: Export to Excel (.xlsx) or Word (.docx); customizable report templates with embedded logos, metadata, and statistical summaries (UTS, YS, E-modulus, elongation at break, peel strength avg./min./max.).
• Data governance: Automatic timestamped archiving, manual save-on-demand, encrypted local storage, and backup to any mapped network or external drive.

Applications

This system serves as a primary mechanical characterization platform in R&D labs, quality control departments, and contract testing facilities. Typical use cases include: tensile modulus and yield strength validation of biaxially oriented polypropylene (BOPP) packaging films; 180° peel adhesion assessment of pressure-sensitive adhesive tapes per PSTC-107; tear resistance evaluation of medical-grade PVC tubing per ISO 10993-12; compressive modulus determination of polyurethane foam cushions; and cyclic fatigue testing of polymer-based orthopedic fixation devices. It also supports advanced analyses such as hysteresis energy loss quantification, creep compliance modeling, and non-proportional extension (NPE) calculations per ISO 6892-1 Annex G.

FAQ

Does the system support ASTM D882-compliant film testing?
Yes—the BWN Series includes dedicated film grips, auto-calibration routines for low-force ranges (<100 N), and preloaded D882 test templates covering gauge length, crosshead speed, and data sampling criteria.

Can test data be exported for third-party statistical analysis?
Yes—raw force/displacement time-series data and processed parameters export directly to Excel (.xlsx) with column headers compliant with Minitab, JMP, and Python pandas ingestion protocols.

Is the software validated for regulated environments?
The base software meets functional requirements for ISO/IEC 17025; optional 21 CFR Part 11 add-ons provide electronic signatures, audit trails, and role-based access control upon installation and IQ/OQ documentation.

What maintenance is required for long-term accuracy?
Quarterly verification using certified reference load cells and displacement standards is recommended; annual recalibration by an ISO/IEC 17025-accredited provider ensures continued compliance with GB/T 16491 Class 1 requirements.

Are custom fixtures available for non-standard specimens?
Yes—North Guang Precision Instruments provides engineering consultation and CNC-manufactured fixtures for specialized geometries (e.g., micro-tensile dogbones, tubular burst clamps, textile loop testers) under NDA.