塑料毛細(xì)管流變儀  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.

塑料毛細(xì)管流變儀

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.

主要技術(shù)參數(shù)：

型號(hào)			BML-400
最大試驗(yàn)容量		5kN	10kN
測(cè)試速度		0.005-20 mm/min
負(fù)荷測(cè)試精度		?0.5%
負(fù)荷分辨率		100000碼
位移精度		?0.5%
變形精度		?0.5%
變形分辨率		0.01mm
動(dòng)態(tài)速度比		1:40,000
最高測(cè)試溫度		400?C
溫度控制		PID 控制，解析度0.1?C，誤差度<?O.5?C
升溫速率		1-10℃/min，連續(xù)可調(diào)，并可快速升溫
控溫精度		顯示<?0.5℃
溫度分辨率		0.1℃
料筒直徑		11.28mm：15mm：9.5 擇一
加熱料筒長(zhǎng)度		200mm
料筒材質(zhì)		碳化鎢
測(cè)試膛		電子加熱測(cè)試膛，抽換式料筒
壓力傳感器	容量擇一	1000bar		700bar			1400bar
	精度	< 0.25%
	材質(zhì)	不銹鋼、可抗腐蝕、耐高溫
毛細(xì)管	口膜材質(zhì)	碳化鎢
	尺寸（L/D）	5/0.5、10/1、20/1、40/1mm
塞頭直徑		φ11.28-0.012mm-0.05mm
塞頭面積		1cm2
測(cè)試模式		恒速、恒壓、等模式
控制軟體		BML系統(tǒng)
電源		220V，50/60Hz，8A
重量		180 kg
附件		手動(dòng)清潔工具一套

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

流變性能的儀器一般稱為流變儀，有時(shí)又叫粘度計(jì)。在測(cè)定和研究塑料熔體流變性的各種儀器中，毛細(xì)管流變儀是一種常用的較為合適的試驗(yàn)儀器，它具有多種功能和寬廣范圍的剪切速率容量。毛細(xì)管流變儀即可以測(cè)定塑料熔體在毛細(xì)管中的剪切應(yīng)力和剪切速率的關(guān)系，又可以根據(jù)擠出物的直徑和外觀或在恒定應(yīng)力下通過改變毛細(xì)管的長(zhǎng)徑比來研究熔體的彈性和不穩(wěn)定流動(dòng)（包括熔體破裂）現(xiàn)象。從而測(cè)其加工行為，作為選擇復(fù)合物配方、尋求最佳成型工藝條件和控制產(chǎn)品質(zhì)量的依據(jù)；或者為輔助成型模具和塑料機(jī)械設(shè)計(jì)提供基本數(shù)據(jù)。

毛細(xì)管流變儀可以測(cè)定高聚物的軟化點(diǎn)、熔點(diǎn)、流動(dòng)點(diǎn)、粘度粘流活化能，熱固性材料的固化溫度等性能指標(biāo)。這些數(shù)據(jù)對(duì)研究高聚物流變性能有重要的作用。

如果要尋找一臺(tái)精密的熔融指數(shù)儀，那么可以考慮使用毛細(xì)管流變儀。一般的熔融指數(shù)儀測(cè)量的只是剪切速率/黏度曲線上的一點(diǎn)，只能對(duì)材料的流動(dòng)性或平均分子量進(jìn)行的評(píng)估，而毛細(xì)管流變儀可以測(cè)定材料黏度隨溫度及壓力的變化。試驗(yàn)時(shí)，溫度恒定，活塞以幾種不同的速率移動(dòng)，這樣就能知道黏度與剪切速率和剪切力之間的關(guān)系。

在線流變儀的未來發(fā)展趨勢(shì)

高精度測(cè)試：將不斷提高測(cè)試精度和靈敏度，能夠更準(zhǔn)確地評(píng)估材料的流變性質(zhì)和變形行為。

多參數(shù)測(cè)試：將發(fā)展成為一種能夠同時(shí)測(cè)試多個(gè)參數(shù)的儀器，可以更全面地了解材料的流變特性。

數(shù)據(jù)分析與模型建立：隨著人工智能和大數(shù)據(jù)技術(shù)的發(fā)展，未來的在線流變儀將具備更強(qiáng)大的數(shù)據(jù)處理和分析能力，能夠構(gòu)建更精確的流變模型。

在線流變儀作為一種能夠?qū)崟r(shí)監(jiān)測(cè)材料流變性質(zhì)的先進(jìn)設(shè)備，在工業(yè)生產(chǎn)和科學(xué)研究中具有重要的應(yīng)用價(jià)值。未來，隨著技術(shù)的不斷發(fā)展，我們期待它能夠在材料研究、產(chǎn)品開發(fā)和工藝優(yōu)化等方面發(fā)揮更大的作用，為推動(dòng)工業(yè)領(lǐng)域的創(chuàng)新和發(fā)展做出貢獻(xiàn)。

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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