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Method for testing environmental stress cracking resistance (ESCR) of drip tape

A technology of environmental stress resistance and inspection method, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems that the drip irrigation tape can not effectively prove that the resistance to environmental stress cracking meets the requirements of use, and achieves easy operation and practicality Convenience, effect of ensuring rationality

Inactive Publication Date: 2010-12-01
GANSU DAYU WATER SAVING
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Problems solved by technology

However, the environmental stress cracking resistance of the drip irrigation tape with a wall thickness of less than 0.5mm was inspected and judged according to the GB / T 15819 standard, and it was found that the products that passed the inspection still had cracking phenomena during storage and application, indicating that the drip irrigation tape was inspected according to this standard. Environmental stress cracking resistance, the test results cannot effectively prove that the environmental stress cracking resistance of the drip irrigation tape meets the requirements of use

Method used

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Embodiment Construction

[0018] Test conditions: indoor temperature 20±2°C, relative humidity 60%.

[0019] Sample source: Non-pressure-compensated inner panel dripper φ16×0.2×300mm drip irrigation tape produced by Gansu Dayu Water Saving Co., Ltd.

[0020] Test equipment: electric blast constant temperature oven: produced by Shanghai Dongxing Building Materials Testing Equipment Co., Ltd., type 101A-2, 0-300 °C; electric magnetic stirrer: produced by Jiangsu Yitong Electronics Co., Ltd., type CJJ78-1.

[0021] A method for testing the environmental stress cracking resistance of a drip irrigation tape, comprising the following steps:

[0022] (1) Randomly select five samples from the same batch and different reels as a group, each sample does not contain a dripper, the length is 100mm, and there is no crack in each part.

[0023] (2) After adjusting the state of a group of samples taken at room temperature for 2 to 4 hours, wash them with distilled water, wipe them with degreasing gauze, and put them...

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Abstract

The invention relates to a method for testing the environmental stress cracking resistance (ESCR) of a drip tape, which comprises the following steps of: (1) sampling; (2) cleaning, drying, cooling to be room temperature, and keeping the drying status for later use after adjusting the status of a plurality of samples; (3) preparing active solution with volume concentration of 20%; (4) evenly coating active solution on the two sides of each sample, and folding each sample to be four layers in a shape like Chinese character 'ZHI'; (5) putting the five folded samples into a sample clamp in parallel and screwing; (6) putting the sample clamp with the samples into an oven with the temperature of 60+ / -20 DEG C and timing; (7) drying under constant temperature for 8h, withdrawing the clamp, naturally cooling to the room temperature, withdrawing the samples, wiping solvent, and visually observing whether the side edge of each sample has crackle under natural light; and (8) judging a result. The method is easy to operate, practical and convenient, and is an effective method for testing the environmental stress cracking resistance (ESCR) of the drip tape currently after being verified with repeated experiments.

Description

technical field [0001] The invention relates to the field of testing methods for technical standards of drip irrigation products, in particular to a testing method for the environmental stress cracking resistance of drip irrigation tapes. Background technique [0002] Feedback from the current sales market of drip irrigation belts shows that the main quality problems of drip irrigation belts are serious side cracking. This quality problem exists in the products of most domestic manufacturers. After testing and analysis, it is caused by the poor environmental stress cracking resistance of drip irrigation belts. . The current national standards and industry standards for drip irrigation belts do not specify and require the environmental stress cracking resistance of drip irrigation belts, but only specify the environmental stress cracking resistance of drip irrigation pipes. The regulations require that the detection method be based on the national standard GB / T 15819. The re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18
Inventor 王冲田小红茹凤虎安胜鑫王飞
Owner GANSU DAYU WATER SAVING
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