Material formaldehyde emission rate limit load rate test method

Abstract

The invention relates to a material formaldehyde emission rate limit load rate test method which comprises the steps: 1, a test cabin is cleaned and dried until the formaldehyde concentration is smaller than or equal to 0.006mg / m<3>; 2, a test sample is pretreated and arranged on a sample frame of the test cabin, and the test cabin is sealed and recorded as an experiment zero point; 3, gas in the test cabin is collected, the formaldehyde concentrate in the test cabin is recorded, and the sampling time is recorded; 4, the specific value between the formaldehyde concentration and the limit load rate is utilized as a longitudinal coordinate, the sampling time is utilized as a horizontal coordinate, a test curve is drawn, the least squares fit is performed, and the slope of the test curve is the formaldehyde emission rate of the test sample. According to the test method, a limit load rate method is utilized to test a free emission process of a material, and the emission property of the material can be truly reflected; the limit load rate material use amount is small, the cost is savedreduced, and the test results are true and conform to the reality; the experiment time is shortened to 2 to 5h; the sealed test cabin is utilized, so that the situation that a lot of clean air flows into is avoided, the disturbance air error is avoided, and the experiment accuracy is high.

Description

technical field [0001] The invention relates to a method for testing the formaldehyde emission rate of a material, in particular to a method for testing the ultimate bearing rate of the formaldehyde emission rate of a material. Background technique [0002] Formaldehyde has always been the primary pollutant in the indoor environment. As early as 1995, formaldehyde was identified as a carcinogen by the International Agency for Research on Cancer (IARC). The formaldehyde in the indoor environment mainly comes from building decoration and decoration materials. The release cycle of formaldehyde is very long, which can reach decades, which seriously endangers human health and drastically reduces the quality of the indoor environment. [0003] In 2001, my country issued ten mandatory standards for decoration materials, strictly limited the formaldehyde limit indicators of various materials, and formulated a variety of test methods, including: 1) the method of heating distillation ...

AI Technical Summary

Problems solved by technology

Formaldehyde in the indoor environment mainly comes from building decoration and decoration materials. The release cycle of formaldehyde is very long, which can reach decades, which seriously endangers human health and drastically reduces the quality of indoor environment.

[0003] In 2001, my country issued ten mandatory standards for decoration materials, strictly limited the formaldehyde limit indicators of various materials, and formulated a variety of test methods, including: 1) the method of heating distillation or heating extraction to test the formaldehyde content in materials; but The content of the heating test has no direct relationship with the amount of emission and the impact on the environment; 2) The desiccator method is used to test the amount of formaldehyde emission under high humidity conditions; but there are shortcomings in the test under high humidity, which deviates from the actual use environment, and the test results are inaccurate; 3) Test the stable concentration of formaldehyde by the climate chamber method, and then calculate the stable emission rate; but the test period is long, the test conditions deviate greatly from the actual building environment conditions, and the test equipment is expensive; 4) Establish a mathematical model to calculate the initial emission of the material Concentration, diffusion coefficient and distribution coefficient, and then infer the emission performance of the material; however, a large number of uncertain parameter factors are introduced and the model is usually complicated, which is inconvenient to apply, and the test parameters cannot be directly used to evaluate the pollution level to the environment

Images