Plastic Flexural Strength and Flexural Modulus Test

Abstract Summary: This article introduces the use of the Kunpeng BOYI 2025 electronic universal testing machine, combined with a three-point bending fixture, to conduct plastic three-point bending tests according to "GB/T 9 341-2008 Plastics   Determination of bending properties," presenting an example of a plastic three-point bending test. The test results show that the Kunpeng BOYI 2025 electronic universal testing machine can fully accommodate plastic bending tests. 。

Keywords: Kunpeng BOYI 2025 electronic universal testing machine     Plastic   Polymer   Polymer   Bending test

Plastic raw materials Defined as a material that is synthetic or natural high molecular polymer that can be molded into various shapes and retain the shape permanently, or plastic material products. Plastics are important organic synthetic polymer materials. Due to their excellent physical and chemical properties and processing characteristics, they are widely used in daily work and life. According to different usage characteristics, plastics are generally divided into general-purpose plastics engineering plastics and specialty plastics three types. This application selects the 5 most common plastics in daily life for testing, allowing a direct comparison of the mechanical property differences among various plastics. The electronic universal testing machine is one of the most important physical performance testing devices for analyzing the mechanical properties of plastics. The Kunpeng testing machine is equipped with a three-point bending fixture with high rigidity, ensuring accurate force analysis during bending. It also features quick connectors and adjustable supports for fast installation and support adjustment. Additionally, the specimen centering limit device allows quick placement of samples and ensures consistent positioning each time, guaranteeing result reproducibility. Besides the fixture, the main testing machine's high precision and data acquisition frequency exceeding 1000Hz can fully record all characteristic data during bending, providing users with accurate and reliable test data. Coupled with intelligent testing software, it can simultaneously provide various test curves such as single specimen, multiple specimens, and dual coordinates, offering a good interactive experience for different users and supporting enterprise R&D, quality, and product control.

1. Test Section

1.1 Instruments and Fixtures

BOYI 2025-010

Electronic Universal Testing Machine   Three-point bending fixture

Smartest software

1.2 Analysis Conditions

Test temperature: approximately 22°C room temperature

Load sensor: 10kN (0.5 grade)

Loading test speed: 2mm/min  

Span: 64mm

Diameter of indenter and supports: 10mm

1.3 Samples and Treatment

In this test, 5 injection-molded plastic samples were selected, including raw materials or reinforced plastics, with materials being PP, PP+EPDM+TD20, ABS, PC, PA+30GF. All samples measure 80mm×10mm×4mm, with 5 pieces each.

2. Test Introduction

The test was conducted using the BOYI 2025-010 electronic universal testing machine. Samples were placed flat on the lower support, and the middle indenter applied force at a rate of 2mm/min. Force and displacement data were measured during the process and bending test curves generated.

Figure 6

Test system diagram (main machine, fixture)   3. Results and Conclusions

3.1 Test Results

The specific test results are shown in Table 1.

Table 1. Test Results  

Figure 12 - Test curve PP

Figure 13 - Test curve PP+EPDM+TD20

Figure 14 - Test curve ABS

Figure 15 - Test curve PC

Figure 16 - Test curve PA+30GF

From above

(Table 1 data and test curves show that during the continuous downward pressing of the indenter, the sample's force increases continuously to the maximum force point, then slowly decreases or fractures. The software can record the complete test curve throughout the process and obtain data such as maximum force, stress, ) displacement stroke, and other parameters for analysis. It can accurately identify and automatically calculate results and curves for both tough and brittle fracture samples. Each group of 5 samples shows good reproducibility, meeting standard requirements. The test results reflect the high precision and stability of the Kunpeng BOYI 2025-0 . Conclusion 10  Three-point bending fixture The above test results indicate that the Kunpeng

4. combined with the three-point bending fixture can fully meet the requirements of "GB

  上述试验结果表明，鲲鹏 Conclusion 10  Three-point bending fixture 配合三点弯曲夹具可以完全满足《GB According to the standard /T 9341-2008 "Determination of Bending Properties of Plastics", the test is completed efficiently and with high quality. Through a high-precision, high-sampling-rate testing system, various mechanical data of plastic materials can be obtained reliably and stably. This is very important for the technological development of plastic materials and can provide data support and technical assurance for enterprises' product research and development, quality management, as well as the standardization and regulation of the industry.