Odor evaluation method for automobile part material by threshold method

A technology of auto parts and evaluation methods, applied in the field of auto parts, can solve problems such as inability to switch between different states, large errors, and evaluation interference, and achieve the effects of improving reliability, increasing screening, and increasing credibility

Pending Publication Date: 2020-09-22
中汽研汽车零部件检验中心(宁波)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For personnel engaged in multiple standard odor evaluations, it is not possible to switch between different states like equipment to adapt to different standards, which will cause interference between evaluations
[0006] 2. Each odor standard

Method used

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  • Odor evaluation method for automobile part material by threshold method
  • Odor evaluation method for automobile part material by threshold method
  • Odor evaluation method for automobile part material by threshold method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1: The dilution factor of a single substance is determined. Choose the common compound nonanone in car seat leather. Use a micro-injection needle to take 1ul of nonanone and inject it into an odorless sampling bag filled with 10L of high-purity nitrogen. Heating in a high temperature box at 40°C for 60 minutes. Nonanone purity density: 0.82g / ml, initial concentration in the air bag 82mg / m 3 .

[0030] Connect the prepared odor bag to the dynamic odor detector, set the dilution program, and 4 odor assessors will evaluate the gas samples at different dilution multiples. The dilution gas uses high-purity air.

[0031] The concentration of each sample is calculated from the added nonanone content and each dilution factor. The statistics of the average intensity of different dilutions, concentrations and odors are as follows:

[0032] Table 3. Data table of odor intensity concentration of compound nonanone

[0033] Serial number Dilution factor Odor intensity (grade) ...

Example Embodiment

[0040] Example 2 Determination of the dilution factor of leather fabric:

[0041] Put a sample of leather fabric 10cm*20cm into an odorless sampling bag filled with 10L of high-purity nitrogen, put it in a 40℃ incubator for 16 hours, take it out and cool for 10 minutes, the initial concentration C in the air bag 0 .

[0042] Connect the prepared odor bag to the dynamic odor analyzer, set the dilution program, and 4 odor assessors will evaluate the gas samples under different dilution ratios (high-purity air is used as the dilution gas).

[0043] C 0 It is a constant in the calculation and is not reflected in the final calculation. Let C 0 =1mg / m 3 , By C 0 And each dilution factor is calculated to get the concentration of each sample. The statistics of the average intensity of different dilutions, concentrations and odors are as follows:

[0044] Table 5. Leather fabric odor intensity-relative concentration table

[0045] Serial number Dilution factor Odor intensity (grade) Relati...

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Abstract

The invention discloses an odor evaluation method for an automobile part material by a threshold method, which is characterized in that firstly, sampling evaluation methods of the part material are counted, the difference of odor evaluation modes of the part material is solved, odor difference comparison of products of different levels is facilitated, and the transfer of odor intensity among the products of different levels is facilitated to be obtained; secondly, sampling and environmental treatment refer to original conditions and can be compared with an original method, meanwhile, samplingand environment treatment conditions can be adjusted as required at any time without influencing the use of the method; thirdly, the odor evaluation personnel can use the method to train, so that thecapability screening of the odor evaluation personnel is increased, and the capability consistency and stability of the odor evaluation personnel are ensured; fourthly, the original rating descriptionwith difficulty in multi-language description and sensory definition is converted into the judgment whether the smell can be identified or not, so that the evaluation difficulty is reduced, and the data reliability is improved; and fifthly, a blank blind sample is used in the test, so that the credibility of experimental data is improved.

Description

technical field [0001] The invention belongs to the field of auto parts, and in particular relates to an odor evaluation method of an auto part material threshold method. Background technique [0002] The odor evaluation of auto parts materials is currently carried out in the form of subjective ratings by personnel. At present, there is no unified national standard, only group standards and automobile enterprise standards. After the parts and materials are stored in a closed container at a certain temperature, a trained odor evaluator will conduct an olfactory evaluation of the sample gas in the closed container, and score according to the odor intensity shown in the odor grade evaluation table, Table 1 Odor grade evaluation The table is quoted from T / CMIF 12-2016 "Standards for Odor Evaluation of Auto Parts and Materials". [0003] Odor intensity rating scale original description Level 1 Odorless, hardly noticeable level 2 Odor, Perceptible, Slight...

Claims

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Application Information

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IPC IPC(8): G01N33/00
CPCG01N33/0067G01N33/0001G01N33/0018
Inventor 刘亚林王焰孟陈鲁铁郭金玉李传杰王科姚谦李骊璇王崇
Owner 中汽研汽车零部件检验中心(宁波)有限公司
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