KR-722E Water Bath Explosion-Proof Constant Pressure Capillary Rheometer
This rheometer is a computer-controlled intelligent constant pressure capillary rheometer, through the computer to determine the role of various pressures of various specifications of the capillary tube at different heating rates, and different temperatures when the extrusion speed.
Due to the specificity of the specimen, the machine is heated by a water bath, and equipped with an explosion-proof design, man-machine operation is separated to increase the safety of the testers.
The machine is controlled by a computer to record the extrusion speed, pressure and heating temperature, automatically processed into the viscosity number, and draw curves and print the complete report form.
Product Details：
The KR-722E explosion-proof capillary rheometer is a dedicated computer-controlled flow testing instrument specially developed for flammable, volatile polymer raw materials and solvent-containing compound systems. Different from conventional electric heating rheometers, it adopts full circulating water bath constant temperature heating architecture, paired with complete explosion isolation circuit and separated human-computer operation layout to eliminate ignition risks in dangerous laboratory environments.
The equipment performs quantitative melt rheology testing under precise constant pressure loading. It automatically records extrusion displacement, real-time barrel pressure and accurate temperature data under multiple temperature rise gradients and various capillary die specifications. Supporting one-click automatic calculation of apparent melt viscosity, shear stress and shear rate, the system generates complete editable test curves and printable inspection reports, fully complying with ISO 11443 and ASTM D3835 polymer flow testing specificationsISO. It is widely deployed in chemical synthesis labs, solvent-based resin factories, flammable polymer R&D centers and explosion-proof third-party testing institutions.
Core Competitive Advantages
- Full Water Bath Constant Temperature & Intrinsic Safety Explosion-Proof Design
Uniform circulating water bath heating replaces open electric heating wires, avoiding local high-temperature hot spots that may ignite volatile organic gas. All control circuits, servo drive components and sensor modules adopt sealed explosion-proof structural design; power cabinet and test mainframe are physically separated to block flame propagation, meeting industrial explosion safety operation requirements for solvent-containing samples. Temperature control precision reaches ±0.5℃ with 0.1℃ display resolution, ensuring consistent melt state during long testing cycles.2.High-Stability Fuji Servo Constant Pressure Driving SystemEquipped imported Fuji servo motor and closed-loop servo controller, realizing ultra-wide adjustable piston moving speed ranging from 0.001 mm/min to 100 mm/min. The 500kg high-precision load sensor provides 0.01MPa pressure resolution with overall testing error controlled within ±1%, stably maintaining constant pressure extrusion state for low/medium/high viscosity flammable polymer melts. The piston rod surface is wrapped with PE buffer layer to eliminate rigid metal contact abrasion and particle contamination.3.Complete Multi-Spec Tungsten Carbide Capillary Die KitComes with a full set of 12 wear-resistant tungsten carbide extrusion dies covering 3 bore diameters (1.5/2.0/3.0mm) and 4 length sizes (5/10/20/40mm). Hard alloy die inner surface resists abrasion from filled flammable resins, supporting multi-die comparative testing to analyze shear thinning and melt fracture characteristics of different materials. Custom piston rod diameters (steel/copper optional) are available for special sample formulations.4.Intelligent PC Data Acquisition & Professional Rheology Analysis SoftwareDedicated matching test software synchronously collects all real-time test parameters, automatically drawing viscosity-temperature curves, pressure-displacement curves and shear rate characteristic graphs. It integrates built-in algorithms for apparent viscosity, bulk flow factor and extrusion swell calculation, supporting batch data storage, multi-group curve superposition comparison and one-click color printing of standardized laboratory test reports.5.Independent Separated Human-Machine Safe Operation LayoutTest heating barrel assembly and electrical explosion-proof control cabinet are placed in separate zones. Operators only conduct parameter setting and data viewing on the remote computer terminal, avoiding direct contact with high-temperature volatile sample area, greatly reducing personnel safety hazards during continuous batch testing of flammable raw materials.6.Compact Complete Matching Configuration, Ready-To-Use After UnpackingFull factory delivery includes main test host, explosion-proof control cabinet, industrial control computer and color inkjet printer, eliminating separate procurement of auxiliary equipment. Standard accessories contain multiple spare piston rods, precision temperature detection modules and dedicated cleaning tools, lowering early laboratory equipment investment cost.
Technical Parameters
| Temperature range: | room temperature～90℃±1℃ |
| Temperature rise rate: | 0.5 ~ 6 ℃ / min, continuously adjustable, and can be rapid temperature rise |
| Temperature accuracy: | computer display <±0.5℃, resolution: 0.1℃. |
| Plug diameter: | designed according to user requirements, plug rod can be steel or copper, plug to be covered with a layer of polyethylene plastic to prevent hard contact. |
| Total weight of specimen: | 15g |
| Special gravity of specimen: | 1.34g/cm3 |
| Area of plug head: | 1cm2 |
| Pressure range： | 1-50MPa±1% |
| Discharge port (D*L):(mm×mm) | ф1.5×5; ф1.5×10; ф1.5×20; ф1.5×40;
ф2.0×5; ф2.0×10; ф2.0×20; ф2.0×40; ф3.0×5; ф3.0×10; ф3.0×20; ф3.0×40 |
| Material of outlet: | tungsten carbide |
| Rated load value of sensor: | 500kg |
| Load measurement precision: | ±1% |
| Load resolution: | 20000 yards |
| Computer speed setting: | 100mm/min – 0.001 mm/min |
| Displacement measurement accuracy: | ± 0.5% |
| Power supply: | 220V, 50Hz, power <400W |
Standard Complete Test Operating Workflow
- Pre-Equipment Safety Inspection & Water Bath Preheating
Check explosion-proof cabinet sealing integrity and circulating water pipeline tightness; fill constant temperature water tank, power on and preheat the water bath system to preset target temperature, wait for full temperature stabilization.
- Sample Loading & Piston Installation
Weigh 15g fully dried flammable polymer sample and fill uniformly into the test barrel, install matched PE buffer wrapped piston rod and lock the barrel sealing structure to prevent volatile gas leakage.
- Test Program Parameter Setup
Open supporting rheology software on the separated control computer, select corresponding capillary die size, set target temperature, heating rate and constant extrusion pressure value, save custom test recipe for repeated batch testing.
- Automatic Constant Pressure Extrusion Test
Start the servo drive system; the piston pushes molten sample through tungsten carbide die under stable constant pressure. The system continuously collects pressure, displacement and temperature data in real time throughout the extrusion cycle.
- Rheology Data Calculation & Curve Export
After completing the full test cycle, the software automatically computes core rheology indicators including melt apparent viscosity and shear stress, supports overlapping comparison of multiple groups of test curves and one-click report printing.
- Post-Test Cleaning & Safety Shutdown
Cool the water bath and test barrel down to room temperature, disassemble piston and capillary die for thorough solvent cleaning; close gas/volatile exhaust pipeline, cut off power and water supply to finish daily testing workflow.
Widely Applicable Industrial & Laboratory Scenarios
Solvent-Containing Resin & Chemical Synthesis Labs
Flammable liquid modified resins, low-molecular polymer prepolymers, solvent-diluted coating raw materials; safe flow characteristic testing under explosion-proof working conditions.
Special Flammable Polymer Manufacturing Enterprises
Low-temperature thermoplastic elastomers, solvent-based adhesive raw materials, lightweight foam polymer compounds; evaluate melt viscosity and extrusion processing performance without explosion risk.
New Energy & Fine Chemical R&D Institutes
Volatile lithium battery polymer binders, flammable additive masterbatches, organic composite raw materials; formula rheology screening in explosion-proof lab environments.
Explosion-Proof Third-Party Material Certification Institutions
Compliance testing of flammable polymer raw materials per ISO 11443 and ASTM D3835 standards, providing official safety inspection reports for factory production approval.
University Chemical & Polymer Teaching Labs
Explosion-proof rheology teaching experiments for volatile polymer systems, student formulation safety performance research.
Standard Factory Full Delivery Kit
- KR-722E water bath explosion-proof capillary rheometer main test host
- Independent sealed explosion-proof electrical control cabinet with imported Fuji servo drive assembly
- Complete set of 12 tungsten carbide standard capillary dies
- 1 standard piston rod + 2 spare customizable piston rods
- Industrial control desktop computer + dedicated rheology analysis software installation U disk
- Color inkjet printer and matched printing consumables
- Full set of temperature circulation water pipeline fittings and cleaning tools
- Multilingual operation manual aligned with international capillary rheology testing standards
- Factory explosion safety calibration inspection certificate and electrical wiring schematic
Global Distributor & After-Sales Support
We provide one-on-one remote operation training and flammable material test parameter debugging guidance, with long-term stable supply of tungsten carbide dies, servo motors and temperature sensing spare parts. Custom special piston sizes and overseas 60Hz voltage conversion explosion-proof control cabinets are available for bulk purchase orders. Exclusive regional agent policies include priority production scheduling, OEM private brand labeling and full sets of high-definition product marketing image resources.
English Overlay Text For All Product Pictures
Main Banner Title: KR-722E Water Bath Explosion-Proof Constant Pressure Capillary Rheometer
Control Panel & Software Tags: TEMP RATE SET / CONSTANT PRESSURE MODE / DIE SELECT / CURVE SAVE / REPORT PRINT
Feature Overlay Tags: Circulating Water Bath Heating / Full Explosion-Proof Isolation / Fuji Servo Drive / 12 Tungsten Carbide Dies / Separated Safe Operation Layout
Safety Operation Tip: Ensure Complete Water Bath Circulation Before Heating Flammable Polymer Samples
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