ASTM D4565 Test Methods for Physical and Environmental Performance Properties of Insulations and Jackets for Telecommunications Wire and Cable. These test methods cover procedures for the physical testing of thermoplastic insulations and jackets used on telecommunications wire and cable and the testing of physical characteristics and environmental performance properties of completed products. To determine the procedure to be used on the particular insulation or jacket or on the completed wire or cable, make reference to the specification for that product.

Test: 

o Aging test: For sheath only, the performance change of the sheath material is evaluated by simulating the aging process under long-term use conditions.
o Cold bending test: for insulation only, test the bending performance of the insulating material in a low temperature environment to ensure that it will not be brittle under cold conditions.
o Environmental stress cracking test: suitable for polyolefin sheath, to test the ability of sheath material to resist cracking under specific environmental stress.
o Thermal deformation test: for the sheath only, to investigate the ability of the sheath material to resist deformation at high temperatures.
o Thermal shock test: for the sheath only, to evaluate the performance stability of the sheath when subjected to rapid temperature changes.
o Insulation adhesion test: Measure the adhesion between the insulation and the conductor or other adjacent materials to ensure that the insulation layer will not fall off easily during use.
o Insulation and sheath retraction test (oven method): The thermal stability of the insulation and sheath is evaluated by placing the sample in an oven to heat it and observing the retraction of the insulation and sheath.
o Insulation compression test: test the performance of the insulating material when subjected to compressive force to ensure that it can withstand a certain pressure during cable installation and use.
o Insulation retraction test (solder method): It is mainly used to evaluate the retraction characteristics of insulating materials when exposed to high-temperature solder.
o Melt flow rate: For polyolefin materials, measure the change of their flow properties in the hot melt state to reflect the change in the properties of the material.
o Oil immersion test: For the sheath only, the performance changes of the sheath material in the oil environment are investigated, and its oil resistance is evaluated.
o Oxygen induction time: It is divided into polyolefin insulation and cable filling compounds, and the oxidation resistance of the material is evaluated by measuring the induction period in the oxygen environment.
o Tensile and elongation tests: Determine the tensile strength and elongation at break of insulation and sheath materials to evaluate the mechanical properties of the materials.

• Physical and environmental testing of finished wires and cables:
o Cable torsion test: simulate the torsional force that the cable may experience during use to evaluate its performance stability.
o Compound flow test: It is suitable for filling core wires and cables to test the flow performance of filled compounds under specific conditions.
o Corrugated elongation test: test the elongation performance of the corrugated structure of the cable when stretched or bent.
o Cable impact test: Evaluate the impact resistance of the cable by simulating the impact conditions.
o Sheath bonding test: check the bonding effect between the sheath and other components to ensure the integrity of the cable structure.
o Sheath incision test: Evaluates the ability of the sheath to resist cracking and vandalism in the presence of incisions.
o Sheath peel or pull test: Measure the bond between the sheath and the rest of the cable to ensure that the sheath will not peel off easily during use.
o Sheath sliding strength test: test the sliding performance of the sheath when subjected to external force, and evaluate its fit with other parts of the cable.
o Pressure test: Applied to air-core wires and cables, by applying pressure to verify their tightness and structural integrity.
o Sheath adhesion test: to investigate the adhesion between the sheath and other parts of the cable.
o Water permeation test: suitable for filling core wires and cables to test the ability of the cable to resist water penetration.
o Wire and cable bending test: Simulate the bending of wires and cables during installation and use to evaluate their bending performance.
o Wire Breaking Strength Test: Measure the breaking strength of a wire to evaluate its mechanical reliability