Fully Automatic DMA
Model : VR-7130
- Rubber and Plastics
- DYNAMIC PROPERTIES
- Viscoelasticity (DMA)
VR-7130 Automatic DMA was designed to minimize possible causes of measurement errors and variability by adopting the full automatic system and the unique temperature sensor. In combination with THERMO JETTER, it can measure viscoelasticity down to -90°C (-100°C as an option) without using liquid nitrogen.
A high-polymer material is a viscoelastic material, unlike elastic materials such as metals. In the case of elastic body, strain (response) comes up simultaneously to the given force (input). On the contrary, in case of a high polymer material, time lag will occur between input and response. These relations are different by the sample components and also dependent on temperature, velocity and strain. High polymer materials are used for various uses in various fields by using such characteristics.
As these properties are mainly treated as material properties, response to very minute input (force or strain) will be mainly measured. (Strain is measured to force or force to strain.) The VR-7130 has minimized possibility of human errors and realized excellent precision in viscoelasticity measurement of high-polymer materials.
-
Possible to load 100 max. samples automatically
-
Sample chucking, measurement and discharge are automated, thus minimizing human errors.
-
The temperature difference between the sample and the measurement point was solved by using a thermocouple with a rubber coating of the same thickness as the sample and adopting the step temperature control method.
-
In the measurement of viscoelasticity, minute deformations such as several μm to several tens of μm are measured, so the rigidity (deflection) of each component affects the test results. The DMA adopts a piezoelectric load cell to minimize deflection of the load cell itself, realizing more precise load measurement.
-
The compact body minimizes the influence of resonance and realizes accurate measurements within the measurement frequency of 0.1 to 200Hz (except for the character frequency of the sample).
-
Thermo Jetter cooling system enables measurement at low temperature down to -90°C(-100 °C as an option) without using liquid nitrogen
-
Direct calculation of the phase realizes improve measurement accuracy.
-
Master curve is available optionally.
-
Frequency: 0.1 to 200Hz (Variable)
-
Maximum load: 200N (with Load cell ±450N)
Catalog downloadAPPLICATIONS
Simulation of product property by test pieces
Tire: Abrasion/Friction/Rolling Resistance/Evolution of heat etc.
Car: Ride/Vibration-proof performance/noise
Other Vibration control and/or suppression/Sealing ability………
Molecular structure/degradation level etc.
MEASUREMENT MODES
Fixed point measurement
Temperature dispersion
Frequency Dispersion
Strain dispersion
MEASUREMENT ITEMS
Absolute complex modulus［E✽］
Storage modulus E’
Loss Modulus E’’
Tangent delta tanδ
SOFTWARE
Database software
Management of testing conditions
Management of testing results
Management of equipment conditions
Data backup
Measurement software
Test Condition Input Screen
Choice of testing mode：Fixed point measurement, Temperature dispersion, Frequency dispersion, Strain dispersion etc.
Setup of testing conditions：Testing temperature, frequency and strain
Sample conditions：Thickness, Breadth
Testing Screen
Real time indications while testing（Graph and numeric display）
Present conditions are available by status display. Error handling is easy also
Reporting output and text conversion（CSV form） after testing are possible
Master curve software
Viscoelasticity at high-frequency, under impossible conditions for actual testing, can be estimated by experimental formula
Low temperature property ⇒ High-frequency property
High temperature property ⇒ Low-frequency property
SPECIFICATION
| Name | Fully Automatic DMA |
|---|---|
| Model | VR-7130 |
| Sample dimensions | Rectangular shape 40(L) x 4(W) x 2(t) mm |
| Testing method | Vertical tensile method |
| Sample convey system | Automatic: 100 samples max. |
| Distance between chucks | 20mm （Option: 10mm） |
| Load detection | （1）Load detector: Piezoelectric type load cell(Choose rating:±45N or±450N) （2）Maximum load: 200N(with Lod cell ±450N) （3）Resolution: 1% F.S. |
| Displacement detection | （1）Displacement sensor: Optical fiber, non-contact type small displacement sensor （2）Maximum displacement: 1,000μm （3）Resolution: 0.3μm |
| Vibrator | （1）Vibration system: Electric vibrator (Lower chuck drive) （2）Vibration waveform: Sinusoidal wave （3）Vibration frequency: 0.1 to 200Hz continuously variable （4）Vibration amplitude (strain): ±0.1 to ±2.5% (40 to 1,000μm p-p) continuously variable (±0.2 to ±5% in case of 10-mm chuck distance) |
| Initial tension | （1）Mechanism: Lower side chuck tension by the vibrator （2）Method: Constant strain method, constant load method (calculated to strain) （3）Tension: 0μm to 2,000μm |
| Thermostatic chamber | Framework: Opens and closes automatically |
| Testing temperature range |
-90 to 200℃(optionallly down to -100℃ without using liquid nitrogen) |
| Safety device | （1）Emergency stop switch （2）Overheat limiter （3）Pneumatic limiter （4）Ground-fault circuit breaker |
| Connection for control | （1）Main unit control: USB （2）Temperature control: RS－232C (D－SUB 9pin) |
| Utilities |
（1）Main unit : Power source AC100V 1-phase 2kVA Dry air 0.4MPa |
| Usage environment | （1）Temperature : 5 to 40℃ （2）Humidity : 35 to 80%RH |
| Dimensions | Main unit and the rack: approx. 470 (W) x 470 (D) x 1320 (H) mm Thermo Jetter (cooling air generator): approx. 510(W)x740(D)x1110(H) mm |
| Accessories | Load calibration tool, tool set and connection cables |
OPTION
Master curve software
Temperature/strain dispersion, Temperature/frequency dispersion
Sample cutting blade, the exchangeable blade type
Inquiries about Fully Automatic DMA
TEL.+81-42-572-1397
(Monday to Friday, 9:00 am to 5:00 pm Japan Time)
FAX.+81-42-573-1520
