GB/T 9639.1-2008 (English Version) PDF

Standard No.: GB/T 9639.1-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 9639.1-2008
Replace: GB/T 9639-1988

Scope: 1.1 This part of GB/T 9639 stipulates that under the impact of a free-falling dart at a given height, determine the energy when the number of damages of plastic film and sheet samples reaches 50%. Expressed in terms of impact damage mass. This section applies to plastic films and sheets with a thickness of less than 1 mm. 1.2 Two test methods 1.2.1 Method A: The diameter of the falling dart head is (38±1) mm, and the drop height is (0.66±0.01) m. It is suitable for materials with an impact damage mass of 0.05kg to 2kg. 1.2.2 Method B: The diameter of the falling dart head is (50±1) mm, and the drop height is (1.50±0.01) m. It is suitable for materials with an impact damage mass of 0.3kg to 2kg. 1.3 The mass of the counterweight used to change the mass of the falling body during the step method test should be the same, and the mass of the falling body should be reduced or increased by the counterweight according to whether the previous sample is damaged.

GB/T 9639.1-2008 Referenced Document

GB/T 20220-2006 Plastic.Film and sheeting.Determination of average thickness of a sample,and average thickness and yield of a roll,by gravimetric techniques (gravimetric thickness)
GB/T 2918-1998 Plastics--Standard atmospheres for conditioning and testing
GB/T 6672-2001 Plastics film and sheeting Determination of thickness by mechanical scanning

2008 GB/T 9639.1-2008 Plastics film and sheeting.Determination of impact resistance by the free-falling dart method.Part1:Staircase method
1988 GB/T 9639-1988 Plastics-Film and sheeting-Determination of impact resistance--Free falling dart method