Direct Answer: The Shrink Tension Tester measures shrink tension of plastic sheathing materials per ASTM D2838 using a sample holder, temperature bath, and software-driven electronic interface.

What is the Shrink Tension Tester?

The Shrink Tension Tester is a precision instrument designed to evaluate the shrink tension of plastic sheathing, shrink films, and related thermoplastic materials. Built to meet ASTM D2838 standards, it integrates hardware and software to provide consistent, traceable results.

Which standard does it follow?

• ASTM D2838 – Standard Test Method for Shrink Tension of Plastic Sheathing Materials

Main Components

• Sample Holder – clamps the specimen securely for accurate tension measurement
• Software & Electronic Interface – automates data capture, analysis, and reporting
• Temperature Bath – provides controlled, uniform heating for reliable test conditions

How It Works

The bath liquid is heated to the required temperature. The specimen is clamped in the sample holder and immersed in the bath, where the instrument measures the force generated as the material shrinks. The software records readings in real time, generates graphs, and automatically calculates shrink tension results.

Design Evolution

The STT-205 XP Series represents the next generation of DEK-TRON technology, evolved from earlier DCS-205 and CS-205 models. Enhancements include higher accuracy, faster calibration, and direct USB connectivity to desktop or laptop computers. The plug-and-play software (supplied on CD or digital download) enables calibration, unit selection (lbs, N, g), and easy report printing. Legacy models can be retrofitted to the new XP specification.

Technical Specifications

• Load Cell Capacity: 10 N (others available upon request)
• Sample Weight (Handheld Type): ≈ 2 lbs
• Bath Dimensions (L × H × D): 30 × 26 × 14 in
• Bath Weight: ≈ 45 lbs
• Power Supply: 115 V, 60 Hz, single phase (other options available)

Key Features

• Precision-machined parts and durable materials
• Expert craftsmanship by DEK-TRON instrument makers
• Plug-and-play software for calibration, analysis, and reporting
• Retrofit compatibility with older models

Applications

Ideal for quality control and research testing of shrink films, plastic sheathing, and packaging materials. The system ensures reliable performance evaluation under controlled heat conditions, making it essential for packaging, polymer research, and manufacturing environments.

Frequently Asked Questions

What materials can be tested?
Plastic sheathing materials and shrink films used in packaging and protective applications.

Can older DEK‑TRON testers be upgraded?
Yes, earlier DCS‑205 and CS‑205 models can be retrofitted to the new STT‑205 XP Series.

How is data recorded?
The software records shrink tension data, performs calculations, and can print graphs and reports.