**Labthink XLW (EC) Intelligent Tensile Testing Machine for Peel Strength Analysis of Jam Aluminum-Plastic Composite Films**
Peel strength is a critical physical and mechanical property that reflects the composite fastness of multi-layer materials, especially in packaging applications. It plays a vital role in ensuring the integrity and performance of composite films used in food packaging. This article explores the use of the Labthink Languang XLW (EC) intelligent electronic tensile testing machine to evaluate the peel strength of jam aluminum-plastic composite films, providing insights into testing methods, principles, and equipment parameters.
The XLW (EC) model is designed specifically for testing flexible packaging materials, offering high accuracy and versatility. It supports a wide range of tests, including peeling, stretching, tearing, and heat sealing, making it an ideal tool for quality control in the packaging industry.
**What is Jam?**
Jam is a fruit-based preserve made by combining fruits with sugar, allowing it to be stored for extended periods. To maintain its quality and freshness, jam is often packaged in glass jars or aluminum-plastic composite films. These materials not only help preserve the flavor but also protect the product from oxidation and nutrient loss.
Aluminum-plastic composite films contain layers of aluminum foil, which significantly enhance their barrier properties compared to standard plastic films. However, if the peel strength between layers is insufficient, delamination can occur after packaging, leading to reduced performance and potential product damage. Monitoring peel strength is therefore essential for maintaining the reliability of such packaging solutions.
**Testing Standards and Equipment**
According to GB 8808-1988, the standard test method for determining the peel strength of soft composite plastic materials involves using an intelligent tensile testing machine. The XLW (EC) model from Jinan Languang Electromechanical Technology Co., Ltd. is widely used for this purpose due to its advanced features and precision.
**Key Features of the XLW (EC)**
- Test capacities: 50 N and 500 N (user-selectable)
- High accuracy: Better than 0.5%
- Multiple test speeds: 50 mm/min, 100 mm/min, 150 mm/min, 200 mm/min, 250 mm/min, 300 mm/min, 500 mm/min
- Supports various test procedures: Peeling, stretching, tearing, heat sealing, and more
- Pneumatic sample clamping system to prevent slippage
- Safety features: Overload protection, limit protection, and automatic return
- Data management: Integrated with LabSystemâ„¢ for efficient data handling
**Test Procedure**
Five samples were prepared with dimensions of 15 mm × 200 mm, cut along both transverse and longitudinal directions. Each specimen was manually stripped for 50 mm before being clamped in the upper and lower grips of the testing machine. The test was conducted at a specified speed, and the peel strength was calculated based on the recorded force and displacement data.
**Test Results**
The transverse peel strengths of the samples ranged from 1.81 N/15 mm to 2.15 N/15 mm, while the longitudinal peel strengths varied between 1.85 N/15 mm and 2.21 N/15 mm. These results indicate that the peel strength of the composite layer is relatively low, which could contribute to delamination issues during storage or transportation.
**Conclusion**
The XLW (EC) intelligent electronic tensile testing machine proves to be a reliable and efficient tool for evaluating the peel strength of composite films. Its high precision and user-friendly design make it suitable for both research and industrial applications. For companies producing jam packaging, strengthening the monitoring of peel strength and other critical properties like barrier performance and heat seal strength is crucial to ensure product quality and safety.
Labthink continues to provide innovative testing solutions to customers worldwide, covering all aspects of flexible packaging material evaluation. For more information about our products and services, visit [www.labthink.com](http://www.labthink.com) or contact us directly. We look forward to collaborating with industry partners to advance packaging technology and quality assurance.
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