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Evaluation method of yellowing risk after pvc artificial leather composite pu sponge

A kind of artificial leather and sponge technology, applied in the direction of color/spectral property measurement, etc., can solve problems such as yellowing

Active Publication Date: 2021-12-07
SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problem of yellowing of PVC composite materials during actual production, transportation and storage, and combines the experience and insufficiency of the current amine resistance test, and proposes a new and systematic method for predicting and controlling the risk of yellowing after PVC composites Methods

Method used

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  • Evaluation method of yellowing risk after pvc artificial leather composite pu sponge
  • Evaluation method of yellowing risk after pvc artificial leather composite pu sponge
  • Evaluation method of yellowing risk after pvc artificial leather composite pu sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Take a light-colored PVC sample (STC) and store it in a standard environment for at least 24 hours according to ISO 554-23 / 50, and at least 3 pieces of PVC artificial leather 60*60mm, and then quickly and accurately weigh 500±10mg of 33% triethylene with an analytical balance A solution of diamine in polypropylene glycol (error range ± 2%) was placed in an 80 ml beaker. Cover the prepared PVC sample on the beaker with the PVC side facing up. Then quickly place the beaker with the sample in the middle of a 1000ml odor test glass bottle with a sealed cover, and close the sealed cover, such as figure 1 shown.

[0086] Put the odor test bottle with the test sample in a constant temperature oven at 50°C, take out the PVC sample after standing for 48 hours, wait for the sample to cool to room temperature in a standard environment, and let it stand for 1 hour at room temperature, then use Kone Minolta (KonicMinolta) CM-2500c colorimeter evaluates the color difference before ...

Embodiment 2

[0088] Take a light-colored PVC sample (CRC) and store it in a standard environment for at least 24 hours according to ISO 554-23 / 50, and at least 3 pieces of PVC artificial leather 60*60mm, and then quickly and accurately weigh 500±10mg of 33% triethylene with an analytical balance A solution of diamine in polypropylene glycol (error range ± 2%) was placed in an 80 ml beaker. Cover the prepared PVC sample on the beaker with the PVC side facing up. Then quickly place the beaker with the sample in the middle of a 1000ml odor test glass bottle with a sealed cap, and close the cap. Place the odor test bottle with the test sample in a constant temperature oven at 50°C, take out the PVC sample after standing for 48 hours, and wait for the sample to cool to room temperature in a standard environment. The test instrument, test method, and time are the same as in Example 1. The test results are: ΔL=-0.2, Δa=-0.2, Δb=0.9. The experimental result Δb≤1.0 shows that the risk of yellowin...

Embodiment 3

[0090] Take a light-colored PVC sample (STN) and store it in a standard environment for at least 24 hours according to ISO 554-23 / 50, and at least 3 pieces of PVC artificial leather 60*60mm, and then quickly and accurately weigh 500±10mg of 33% triethylene with an analytical balance A solution of diamine in polypropylene glycol (error range ± 2%) was placed in an 80 ml beaker. Cover the prepared PVC sample on the beaker with the PVC side facing up. Then quickly place the beaker with the sample in the middle of a 1000ml odor test glass bottle with a sealed cap, and close the cap. Put the odor test bottle with the test sample in a constant temperature oven at 50°C, take out the PVC sample after standing for 48 hours, wait for the sample to cool to room temperature in a standard environment, and then measure the values ​​of ΔL, Δa and Δb, test equipment and test The method, time, etc. are the same as in Example 1, and the test results are: ΔL=-0.6, Δa=-0.5, Δb=3.8. The experime...

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PUM

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Abstract

The invention discloses a method for assessing the yellowing risk of PVC artificial leather compounded with PU sponge. On the opening, then put the first container and the PVC artificial leather sample into the second container, and then seal the second container; the second container with the PVC artificial leather sample is placed in a constant temperature device, and after standing for a certain period of time Take out the sample, cool it to room temperature in the dark, and then let it stand for a period of time in the dark at room temperature, then measure the Δb value of the sample before and after the test. The method is simple, reliable and practical, can eliminate the influence of yellowing caused by PVC degradation caused by high temperature itself, and more accurately predict and control the risk of yellowing caused by amine-induced PVC degradation at room temperature.

Description

technical field [0001] The invention belongs to the field of PVC artificial leather compounding, and in particular relates to a method for evaluating the risk of yellowing after compounding PVC artificial leather with PU sponge. Background technique [0002] In recent years, the light and bright colors of automotive interior materials have increased significantly. In the application of light-colored skin materials, people found that light-colored polyvinyl chloride (PVC) artificial leather and polyurethane (PU) sponge were combined by flame, and there was a phenomenon of yellowing during storage and transportation. This leads to obvious inconsistencies in the color matching of the interior materials in the vehicle. If the storage and transportation period is too long, it may also lead to irreversible yellowing, and eventually the vehicle will still have the risk of color mismatch after reaching the client. [0003] The residual amine in the PU foam material causes the degr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
Inventor 袁爱春袁泓周震杰李茹
Owner SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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