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Barcol hardness is a measurement method widely used in the quality control of GFRP.
Barcol hardness is a measurement method widely used in the quality control of GFRP. Barcol hardness is also a type of indentation hardness, and its mechanism is similar to that of durometer hardness. A conical indenter is pressed against the test specimen, and the maximum value is read.
A test specimen with a weight is pulled on top of the counterpart material using a tensile testing machine to determine the static and dynamic friction coefficients.
The friction coefficient test measures the friction coefficient when sliding on the same material or other materials. Please consult us regarding test pieces that do not conform to JIS K7125, such as test pieces with a thickness of 0.5 mm or more.
It is possible to evaluate the electrostatic properties of polymer materials.
It is possible to evaluate the electrostatic properties of polymer materials. Charge decay measurements can be conducted in accordance with standards such as MIL-B-81705, EIA541, and NFPA99. Samples of various shapes can be measured (however, the measurement sizes specified in the standards must be adhered to).
Horizontal combustion test (IEC 60695-11-10 Method A, ASTM D635)
The test specimen (125±5×13±0.5×t mm) is held horizontally, and a 20mm flame is applied for 30 seconds to determine the combustion rate over a distance of 75mm between the reference lines.
125mm vertical combustion test (IEC60695-11-20, ASTM D5048)
Mount the test piece (125±5×13±0.5×t mm) vertically in the clamp and perform 5 seconds of direct flame exposure from a 125mm flame 5 times, then evaluate based on the combustion behavior. Hold the flat test piece (150±5×150±5×t mm) horizontally and perform 5 seconds of direct flame exposure from a 125mm flame 5 times from below, then evaluate based on the combustion behavior. The 5V test is conducted on materials that conform to V-0 or V-1 ratings.
This is a test to determine the tear strength of plastic films and sheets.
• This is a test to determine the tear strength of plastic films and sheets. • Tear strength is expressed in Newton units. • A test specimen with a predetermined slit is torn by releasing a fan-shaped pendulum. • If the samples have equal thickness, comparison is possible.
The oil temperature is raised at a constant rate (120°C/h), and a specified bending stress is applied to the sample, with the temperature at which the specified deflection is reached being defined as the load deflection temperature.
JIS K7191, ISO 75, ASTM D648 The oil temperature is raised at a constant rate (120℃/h), and a specified bending stress is applied to the sample. The temperature at which the specified deflection is reached is referred to as the load deflection temperature. It is used as one of the indicators of the heat resistance of plastics.
The temperature at which the penetration depth of a needle with a cross-sectional area of 1 mm² reaches 1 mm under a specified load, while the oil temperature is steadily increased in the oil, is referred to as VSP.
In oil, the oil temperature is increased at a constant rate (often 50°C/h), and a needle with a cross-sectional area of 1 mm² is applied to the sample with a specified load, with the temperature at which the penetration depth reaches 1 mm being defined as the VSP.
It is represented as BPT when a φ5mm steel ball is pressed with a load of 20N for 1 hour in oil at the test temperature, resulting in a sample indentation depth of 0.209mm.
Electric Appliance Investigation Committee B Method (in oil) The BPT is defined as the depth of indentation of 0.209mm when a φ5mm steel ball is pressed against the sample with a load of 20N for 1 hour at the test temperature in oil. IEC60695-10-2 and Electric Appliance Investigation Committee A Method measure using a "balancing" jig in an oven. DJK only conducts measurements using Method B.
Apply a commercial frequency voltage of 50Hz or 60Hz across the electrodes with the test specimen in between, and determine the voltage that causes the sample to break down.
Apply a commercial frequency voltage of 50Hz or 60Hz across the electrodes with the test specimen in between, and determine the breakdown voltage of the sample. Insulation breakdown strength (max 70kV) (IEC60243, ASTM D149, JIS C2110), measurement methods: short-time method, step method, dielectric strength (1 minute, long duration), measurement atmosphere: in oil (RT to 200℃), in air.
An arc discharge is generated at a specified interval between two tungsten electrodes on the surface of the test specimen, and the time until the sample breaks and the arc discharge disappears is also measured.
An arc discharge is generated at a specified interval between two tungsten electrodes on the surface of the test specimen, and the time until the sample breaks and the arc discharge disappears is also measured. - ASTM D495, JIS K6911
Apply a voltage between the platinum electrodes and drip the electrolyte until tracking failure occurs. Evaluate at a voltage that does not cause failure with the specified number of drips.
Apply voltage between platinum electrodes and drip the electrolyte until tracking failure occurs. Evaluate at a voltage that does not cause failure with the specified number of drops. - IEC60112 CTI (Comparative Tracking Index: Determine the voltage that withstands 50 drops) PTI (Proof Tracking Index: Prove that it withstands 50 drops at the specified voltage)
20mm vertical burning test (IEC 60695-11-10 Method B, ASTM D3801)
Mount the test specimen (125±5×13±0.5×t mm) vertically in the clamp, perform two 10-second indirect flame tests with a 20mm flame, and determine the ratings of V-0, V-1, V-2, or Not based on its combustion behavior.
Vertical Combustion Test for Thin Materials (ASTM D4804)
A film test specimen (200±5×50±1×t mm) is rolled into a cylindrical shape, mounted vertically in a clamp, subjected to a 3-second indirect flame from a 20mm flame twice, and the burning behavior is used to determine VTM-0, VTM-1, VTM-2, or Not.
