Single Fiber Strength Tester
In the tensile test, the measured fiber is sandwiched between the upper holder and the lower holder. According to the panel operation instruction, the monitoring and control program generates the step pulse by the pulse generator , moves up and down the holder by the stepping motor and the transmission mechanism, and reads the number of the step pulse from the reversible counter to complete the elongation measurement.
The load of the measured fiber is generated by the transmission mechanism on the load force sensor. The output signal is passed through the amplifier and the analog-to-digital converter, and the load measurement is completed by reading the conversion result from the monitoring and control program.
Application
The single fibers are stretched to break on a constant elongation extensometer (CRE) under specified conditions. The values of tensile strength, elongation at break, elongation strength, and initial modulus of the specimen obtained from the load-elongation curve or the data display acquisition system are suitable for the tensile test of chemical fiber and natural fiber Stretch performance test.
Standards
GB/T21120 Synthetic fibers for cement, cement mortar and concrete
GB/T14337 Testing method for tensile properties of man-made staple fibers
ISO 5079 Textiles - Fibres - Determination of breaking force and elongation at break of individual fibres
GB/T13835.5 Test method for rabbit hair—Part 5:Breaking tenacity and elongation at break of single fibre
ASTM D3822(M) Standard test method for tensile properties of single textile fibers
JIS L1015 Testing methods for man-made staple fibres
ASTM D1294/2524/3106/3217/1445 Method of test for breaking tenacity of wool fiber bundles
DIN53843-2 Testing of textiles– Loop tensile test for staple fibres
ISO3060 Textiles -- Cotton fibres -- Determination of breaking tenacity of flat bundles
BS5116、BS 4029 Hexagon socket screws and wrench keys: metric series —Part 5: Specification for hexagon socket set screws with cup point
Technical Parameters
| Item | Standard Requirements | Design Requirements | Implementation Method |
|---|---|---|---|
| Load Range | According to the maximum load requirements of the specimen | 0–100 cN | External load cell / pressure sensor |
| Load Error | ±1% | ≤±1% | Verified by sensor accuracy |
| Load Resolution | 0.1 cN | 0.1 cN | Based on sensor accuracy |
| Elongation Range | 100 mm | 100 mm | External displacement sensor |
| Elongation Error | 0.05–0.1 mm | ≤0.01 mm | Verified by sensor accuracy |
| Elongation Resolution | 0.1% | 1% | Based on sensor accuracy |
| Clamp Distance | 2–20 mm | 1–20 mm | Precision machining |
| Lower Gripper Descent Speed | 5–20 mm/min | 1–100 mm/min | Stepper motor control |
| Lower Gripper Stroke | 100 mm | 100 mm | Precision machining |
Accessories
The device can indicate or record the load applied to the specimen and the corresponding elongation value; (Force sensor)
The device can make load-elongation curve; (Integrated software)
The gripper suitably holds a single fiber at the desired nominal gauge length; (Manual, pneumatic and electric. The pneumatic gripper avoids the influence of the measurement of the force sensor and also reduces the degree of damage to the special brittle material during the clamping process.)
The device has a different stretching speed; (Stepper motor)
The device is used to wet the fibers in a wet state experiment so that the fibers are immersed during the test without affecting the test results; (Containers)
The device is used to precisely calibrate the instrument.
FAQ
(1)What properties can a Single Fiber Strength Tester measure?
A Single Fiber Strength Tester is used to measure the mechanical properties of individual fibers, mainly including breaking force, elongation at break, breaking tenacity, modulus, and tensile stress.
According to ASTM D3822, the test method covers tensile properties of natural and man-made single textile fibers, including continuous filaments and staple fibers. The standard evaluates parameters such as breaking force and elongation at break.
(2)Which standards are used for single fiber tensile strength testing?
Common standards include ISO 5079:2020 and ASTM D3822/D3822M.
ISO 5079 specifies the determination method for breaking force and elongation at break of individual fibers under conditioned or wet states. It applies to different fiber types when the available fiber length meets the specified gauge requirements.
ASTM D3822 is widely used for testing natural and synthetic single textile fibers and supports evaluation of tensile properties under different test conditions.
(3)What types of fibers can be tested by a Single Fiber Strength Tester?
A Single Fiber Tensile Tester can evaluate various fibers, including:
Polyester fiber, Nylon fiber, Cotton fiber, Wool fiber, Acrylic fiber, Spandex fiber, Glass fiber, Other man-made or natural fibers.
ASTM D3822 specifically covers both natural and man-made single textile fibers, including filament and staple fibers taken from yarns or tow.
(4)Why is single fiber strength testing important for textile manufacturers?
Single fiber testing provides direct information about raw fiber mechanical performance before yarn or fabric production.
The test helps manufacturers evaluate:
Fiber quality consistency
Raw material stability
Production process influence
Potential impact on yarn strength and final textile performance
ASTM D3822 notes that fiber tensile properties can be affected by yarn and fabric manufacturing processes, so direct measurement of individual fibers helps provide more accurate material evaluation.
(5)What test conditions should be considered when selecting a Single Fiber Strength Tester?
When selecting a Single Fiber Strength Tester, engineers should consider:
Maximum test force range
Gauge length requirements
Tensile speed control
Fiber clamping method
Elongation measurement accuracy
Dry or wet fiber testing capability
ISO 5079 specifies that fiber breaking force and elongation testing should use controlled test conditions, and it recommends constant-rate-of-extension tensile testing equipment to improve result consistency.
(6)Why is the clamping system important in single fiber tensile testing?
The clamping system directly affects test accuracy because individual fibers are extremely thin and sensitive to:
Slippage
Clamp damage
Incorrect alignment
A suitable fiber clamp helps ensure the fiber breaks within the gauge section rather than at the gripping area, improving repeatability and reliability of tensile results.
(7)What data can be obtained from a single fiber tensile test report?
A professional Single Fiber Strength Tester typically provides:
Breaking force (cN or N)
Elongation at break (%)
Breaking tenacity (cN/tex)
Tensile curve
Modulus data (when required)
ASTM D3822 includes calculation methods for breaking tenacity, initial modulus, tangent modulus, tensile stress at specified elongation, and breaking toughness.
Leave Message Get Price
