High and Low Temperature Test Standard of PC Plastic Material

High and Low Temperature Test Standard of PC Plastic Material

1. High temperature test

    After being placed at 80±2℃ for 4 hours and at normal temperature for 2 hours, the dimensions, insulation resistance, voltage resistance, key function, and loop resistance meet the normal requirements, and there are no abnormal phenomena such as deformation, warping, and degumming in appearance. The key convex point collapses at high temperature and the press force becomes smaller without assessment.

2. Low temperature test

After being placed at -30±2℃ for 4 hours and at normal temperature for 2 hours, the dimensions, insulation resistance, voltage resistance, key function, and loop resistance meet normal requirements, and there are no abnormal phenomena such as deformation, warping, and degumming in appearance.

3. Temperature cycle test

Put in 70±2℃ environment for 30 minutes, take out at room temperature for 5 minutes; Leave in -20±2℃ environment for 30 minutes, remove and leave at room temperature for 5 minutes. After such 5 cycles, the dimensions, insulation resistance, voltage resistance, key function, circuit resistance meet the normal requirements, and the appearance of no deformation, warping, degumming and other abnormal phenomena. The key convex point collapses at high temperature and the press force becomes smaller without assessment.

4. Heat resistance

After being placed in an environment with a temperature of 40±2℃ and a relative humidity of 93±2%rh for 48 hours, the dimensions, insulation resistance, voltage resistance, key function, and loop resistance meet normal requirements, and the appearance is not deformed, warped, or degumped. The key convex point collapses at high temperature and the press force becomes smaller without assessment.

National standard value for plastic testing:

Gb1033-86 Plastic density and relative density test method

Gbl636-79 Test method for apparent density of moulding plastics

GB/ T7155.1-87 Thermoplastic pipe and pipe fittings density determination part: polyethylene pipe and pipe fittings reference density determination

GB/ T7155.2-87 Thermoplastic pipes and fittings -- Determination of density -- Part L: Determination of density of polypropylene pipes and fittings

GB/T1039-92 General rules for testing mechanical properties of plastics

GB/ T14234-93 Surface roughness of plastic parts

Gb8807-88 plastic mirror gloss test method

Test method for tensile properties of GBL3022-9L plastic film

GB/ TL040-92 Test method for tensile properties of plastics

Test method for tensile properties of GB/ T8804.1-88 thermoplastic pipes polyvinyl chloride pipes

GB/ T8804.2-88 Test methods for tensile properties of thermoplastic pipes Polyethylene pipes

Hg2-163-65 plastic low temperature elongation test method

GB/ T5471-85 Method for preparing thermosetting molding specimens

HG/ T2-1122-77 thermoplastic sample preparation method

GB/ T9352-88 thermoplastic compression sample preparation

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