1purpose：

XNR—400BThe melt flow rate meter meets the requirements《GB/T 3682The standard "Determination of Mass Flow Rate and Volume Flow Rate of Thermoplastic Melt" is used to determine the flowability of thermoplastic polymers at high temperatures, such as polyethylenePEPolypropylenePPResinABSPolycarbonatePCNylonPA6Measurement of the melt index of various plastic raw materials. the productWidely used in industries such as plastic raw material production plants, plastic product factories, petrochemical companies, as well as relevant colleges, research institutes, and quality inspection units.

IIfeature：

1The melt flow rate meter has quality（MFR）And（MVR）Two measurement methods with melt density testing capability.

2The instrument adopts Delta technologyPLCControl, XinjieOPThe series of LCD text displays and Chinese prompt buttons are easy and convenient to operate.

3It has two cutting methods: timed cutting and positioning device cutting.

4Separate DeltaDTC1000The temperature control module automatically controls the temperature, and after constant temperature, it can be tested multiple times without waiting.

5The displacement counting adopts high-precision photoelectric encoder for counting accuracy.

6It includes two testing methods: timed or positional cutting of materials, and can automatically calculate the melt volume flow rate and melt density after mass input.

7After the experiment is completed, press the result button to automatically calculate the volume flow rate of the melt.；

8It is a fully functional and cost-effective system that can be extended to print reports on computers。

IIIworking principle

XNR—400BThe melt flow rate meter is a plastic extrusion instrument. It uses a high-temperature heating furnace to bring the measured substance to a molten state under specified temperature conditions. The test substance in this molten state is extruded through a small hole of a certain diameter under a specified load. In plastic production, the melt index is commonly used to represent the physical properties such as flowability and viscosity of polymer materials in a molten state. The melt mass flow rate (MFR) refers to the average weight of each section of the extruded sample converted to10The extrusion rate per minute is g/10min; The melt volume flow rate MVR refers to the average volume of each extruded section of the sample converted to10The extrusion rate per minute is cm3/10 minutes.

III Test parameters

1. Temperature control range: room temperature -400℃ (control device) DeltaDVP12SS2

display device Wuxi XinjieOP320-A）

2. Temperature control accuracy:±O.5℃within(Temperature control device) DeltaDTC1000）

3. Temperature resolution:0.1℃ (Sensor)PT100Silver wire lead

4. Measurement range:O.1～240g／10min(MFR)

O.1～260cm³／10min(MVR)

5. Timing accuracy:O.lS

6. Weight: Level 7 full load

7Cutting method: automatic, time controlled

8Material of material cylinder:3Cr2Mo

9. Mouth mold: made of tungsten carbide materialΦ2.095mm

10．merit rate：450W

11Electricity Source:AC220V 、50Hz

4calculation formula

1. The quality method refers to the mass flow rate of the melt, which is converted into 10 minutes of extrusion volume based on the average weight of the material segments divided by unit time. The unit is (g/10min), expressed as MFR:

In the formula: MFR - melt mass flow rate, g/10min；

M - Take the average value of multiple sample segments, g；

T - sample cutting time interval, s；

600- Reference time (10 minutes), s.

2. The volumetric method is the flow rate of the melt volume, converted from the volume extruded per unit time to the extrusion volume in 10 minutes. The unit is (cm3/10min), expressed as MVR:

MVR=42.7×l÷t

In the formula: MVR - melt volume flow rate, cm3/10min；

L - piston movement predetermined measurement distance, mm；

T - sample cutting time interval, s；

42.7- Product of reference time (10 minutes) and piston area.