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塑料毛细管流变仪  Capillary rheometer

Rheological properties:

Capillary rheometer

It can study the viscoelastic properties of substances, including viscosity, elastic modulus, shear stress, etc. Viscosity refers to the degree to which a substance resists shear deformation and can reflect its viscosity. Elastic modulus is the ability of a substance to recover its original shape when subjected to external forces, which can reflect the elasticity of the substance. Shear stress is a force caused by relative motion within a substance, which can reflect the fluidity of the substance.

塑料毛细管流变仪

Rheological behavior:Capillary rheometer

It can study the rheological behavior of substances, including shear rate, yield stress, flow curve, etc. Shear rate refers to the magnitude of the rate of material shear deformation, which can be divided into two situations: shear stability and shear rate variation. Yield stress is the minimum stress at which a substance begins to undergo plastic deformation or flow, and can be used as an indicator of material strength. The flow curve is used to describe the relationship between material shear stress and shear rate, and common types of curves include Newtonian fluids, shear thickening fluids, etc.

主要技术参数：

型号			BML-400
最大试验容量		5kN	10kN
测试速度		0.005-20 mm/min
负荷测试精度		?0.5%
负荷分辨率		100000码
位移精度		?0.5%
变形精度		?0.5%
变形分辨率		0.01mm
动态速度比		1:40,000
最高测试温度		400?C
温度控制		PID 控制，解析度0.1?C，误差度<?O.5?C
升温速率		1-10℃/min，连续可调，并可快速升温
控温精度		显示<?0.5℃
温度分辨率		0.1℃
料筒直径		11.28mm：15mm：9.5 择一
加热料筒长度		200mm
料筒材质		碳化钨
测试膛		电子加热测试膛，抽换式料筒
压力传感器	容量择一	1000bar		700bar			1400bar
	精度	< 0.25%
	材质	不锈钢、可抗腐蚀、耐高温
毛细管	口膜材质	碳化钨
	尺寸（L/D）	5/0.5、10/1、20/1、40/1mm
塞头直径		φ11.28-0.012mm-0.05mm
塞头面积		1cm2
测试模式		恒速、恒压、等模式
控制软体		BML系统
电源		220V，50/60Hz，8A
重量		180 kg
附件		手动清洁工具一套

Capillary rheometerData processing

1. Start operating the application software.

2. Enter experimental report information.

3. Add data files and input experimental parameters to perform experimental operations.

4. Filter data. View the filtered data and check its validity and rationality.

5. Display curves and data.

6. After the experiment is completed, print and save the data and curves.

7. Shut down the system.

Experimental raw materials

Thermoplastic materials such as PE, PP, PS and their composite powders, granules, strip films or molded blocks; Before the experiment, corresponding treatments such as drying should be carried out according to the material category and properties.

When the plastic melt passes through the capillary die, the pressure and temperature of the melt are measured by pressure sensors and thermocouples installed at the capillary die, and the microcomputer records the values of the melt pressure and temperature.

Features and advantages:

1、 The maximum load of the device can be selected as 5 kN or 10kN test force, providing a larger range of test force space to meet more testing requirements; And provide 8 types of experimental discharge port films for selection, providing more complete accessories for various materials research. High control accuracy (constant temperature, constant force, constant speed), minimizing control errors and providing customers with accurate test data.

2、 The real-time acquisition system adopts imported core chips from the United States for more efficient data collection, with a large amount of data transmission per unit time, ensuring delicate and accurate curves.

3、 This instrument uses imported American Shiquan sensors to achieve more accurate force values and more precise measurement results.

4、 The instrument is a desktop computer; Exquisite appearance, using imported servo motors, servo systems, and imported ball screws make the transmission noise extremely small, the displacement accuracy more precise, and efficient. It can be comparable to imported machines from abroad.

5、 The storage of proprietary format files is superior to traditional methods of storing data in small amounts. The interface design is user-friendly and the layout of each functional area is clear, making it easy for users to operate.

6、 Users can edit suitable testing methods based on specific samples, making it very convenient to complete the testing function

7、 Multiple combinations of curves can be used to achieve the "displacement" and "viscosity" curves of different polymer materials at the same temperature. Users can communicate and customize the control software

8、 Equipped with overload protection and limit protection, providing safety assurance for the smooth operation of the equipment.

Application areas:

用途

流变性能的仪器一般称为流变仪，有时又叫粘度计。在测定和研究塑料熔体流变性的各种仪器中，毛细管流变仪是一种常用的较为合适的试验仪器，它具有多种功能和宽广范围的剪切速率容量。毛细管流变仪即可以测定塑料熔体在毛细管中的剪切应力和剪切速率的关系，又可以根据挤出物的直径和外观或在恒定应力下通过改变毛细管的长径比来研究熔体的弹性和不稳定流动（包括熔体破裂）现象。从而测其加工行为，作为选择复合物配方、寻求最佳成型工艺条件和控制产品质量的依据；或者为辅助成型模具和塑料机械设计提供基本数据。

毛细管流变仪可以测定高聚物的软化点、熔点、流动点、粘度粘流活化能，热固性材料的固化温度等性能指标。这些数据对研究高聚物流变性能有重要的作用。

如果要寻找一台精密的熔融指数仪，那么可以考虑使用毛细管流变仪。一般的熔融指数仪测量的只是剪切速率/黏度曲线上的一点，只能对材料的流动性或平均分子量进行的评估，而毛细管流变仪可以测定材料黏度随温度及压力的变化。试验时，温度恒定，活塞以几种不同的速率移动，这样就能知道黏度与剪切速率和剪切力之间的关系。

在线流变仪的未来发展趋势

高精度测试：将不断提高测试精度和灵敏度，能够更准确地评估材料的流变性质和变形行为。

多参数测试：将发展成为一种能够同时测试多个参数的仪器，可以更全面地了解材料的流变特性。

数据分析与模型建立：随着人工智能和大数据技术的发展，未来的在线流变仪将具备更强大的数据处理和分析能力，能够构建更精确的流变模型。

在线流变仪作为一种能够实时监测材料流变性质的先进设备，在工业生产和科学研究中具有重要的应用价值。未来，随着技术的不断发展，我们期待它能够在材料研究、产品开发和工艺优化等方面发挥更大的作用，为推动工业领域的创新和发展做出贡献。

Capillary rheometers are widely used in fields such as materials science, chemical engineering, and food industry. In materials science, it can be used to study the rheological properties of polymer materials, liquid crystal materials, etc., and understand their deformation behavior during processing and application. In chemical engineering, it can be used to evaluate parameters such as viscosity, fluidity, and reaction rate of fluids, optimizing and controlling chemical processes. In the food industry, it can be used to study the rheological properties of food, such as viscosity, flowability, and chewing sensation, to analyze and improve food quality and taste.

In summary, capillary rheometer is an important experimental instrument that studies the rheological properties and behav

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ior of substances by applying external forces and measuring deformation. It has broad application prospects in materials science, chemical engineering, food industry and other fields, providing strong support for research and technological development in related fields.

Function Introduction

1. The luxury interface testing software under Windows XP operating system can achieve constant speed and constant force control mode, which can meet different testing requirements.

2. Data zeroing function: It can reset the actual measurement separately.

3. During the testing process, the viscosity displacement curve can be displayed in real-time, and any actual measurement curve can be customized according to customer needs.

4. Modular design of sample data editor with one-time input permanent call: providing users with the freedom to set the required application sample data.

5. The test results can be stored in proprietary format data files for output, avoiding the problem of excessive data volume in traditional formats such as Excel

purpose

The instrument for rheological properties is generally called a rheometer, sometimes also called a viscometer. Among various instruments for measuring and studying the rheological properties of plastic melts, capillary rheometer is a commonly used and suitable testing instrument, which has multiple functions and a wide range of shear rate capacity. The capillary rheometer can measure the relationship between shear stress and shear rate of plastic melt in the capillary tube, and can also study the elasticity and unstable flow (including melt fracture) of the melt by changing the aspect ratio of the capillary tube under constant stress or based on the diameter and appearance of the extruded material. Thus measuring its processing behavior as a basis for selecting composite formulations, seeking optimal molding process conditions, and controlling product quality; Or provide basic data for auxiliary molding molds and plastic machinery design.

Capillary rheometer can measure performance indicators such as softening point, melting point, flow point, viscosity, viscous flow activation energy, and curing temperature of thermosetting materials of polymers. These data play an important role in studying the rheological properties of polymers.

If you are looking for a precise melt index analyzer, you may consider using a capillary rheometer. A typical melt index meter only measures a point on the shear rate/viscosity curve and can only evaluate the flowability or average molecular weight of materials, while a capillary rheometer can measure the changes in material viscosity with temperature and pressure. During the experiment, the temperature remains constant and the piston moves at several different rates to determine the relationship between viscosity, shear rate, and shear force.

The Future Development Trend of Online Rheometers

High precision testing: will continuously improve testing accuracy and sensitivity, enabling more accurate evaluation of the rheological properties and deformation behavior of materials.

Multi parameter testing: It will develop into an instrument that can simultaneously test multiple parameters, allowing for a more comprehensive understanding of the rheological properties of materials.

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