Supercharge Your Innovation With Domain-Expert AI Agents!

A method of detecting pvc

An extraction agent and volume ratio technology, applied in the field of PVC detection, can solve the problems of inconspicuous characteristic peaks, cumbersome PVC detection process, and inability to detect trace plasticizers, and achieve the effect of simplifying test steps and eliminating interference.

Active Publication Date: 2022-02-18
CHINA FIRST AUTOMOBILE
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for detecting PVC in view of the deficiencies of the above-mentioned prior art, which can detect plasticizers and PVC materials in PVC at the same time, and solve the problems of cumbersome PVC detection process, inconspicuous characteristic peaks, and microplasticization. technical problems that cannot be tested

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method of detecting pvc
  • A method of detecting pvc
  • A method of detecting pvc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The volume ratio of tetrahydrofuran to acetone in the main extractant is 1:1, the volume ratio of ethyl acetate to chloroform in the auxiliary extractant is 1:0.1, and the volume ratio of the main extractant to the auxiliary extractant is 5:1 , The ratio of PVC sample mass (g) to extractant volume (ml) is 1:40. After extraction, let it stand and dry. After extracting the plasticizer with methanol, cut a small piece of transparent film for infrared detection.

Embodiment 2

[0025] The volume ratio of tetrahydrofuran to acetone in the main extractant is 2:1, the volume ratio of ethyl acetate to chloroform in the auxiliary extractant is 1:0.5, and the volume ratio of the main extractant to the auxiliary extractant is 10:1 , The ratio of PVC sample mass (g) to extractant volume (ml) is 1:30. After extraction, let it stand and dry. After extracting the plasticizer with methanol, cut a small piece of transparent film for infrared detection.

Embodiment 3

[0027] The volume ratio of tetrahydrofuran to acetone in the main extractant is 3:1, the volume ratio of ethyl acetate to chloroform in the auxiliary extractant is 1:1, and the volume ratio of the main extractant to the auxiliary extractant is 1:1 , The ratio of PVC sample mass (g) to extractant volume (ml) is 1:30. After extraction, let it stand and dry. After extracting the plasticizer with methanol, cut a small piece of transparent film for infrared detection.

[0028] Optimal embodiment of the present invention 2 infrared detection results such as Figure 4 ,Compared image 3 . It can be found that the characteristic peak of PVC at 694 is more obvious, which is beneficial to the judgment of PVC materials. figure 1 It is a PVC material that is hot-pressed into a film, figure 2 In order to extract and dry the film-forming PVC material in the best embodiment 3 of the present invention, the transparency of the PVC film prepared in the best embodiment 2 of the present inven...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for detecting PVC. The PVC is extracted with an extractant, the additive is extracted with methanol after the extract is dried, and the film is used for detecting PVC. The method for detecting PVC of the present invention has the following characteristics: the method for detecting PVC material is to dry and form a film after extraction for infrared detection, which eliminates the interference of plasticizers, makes the characteristic peaks more obvious, and is conducive to the judgment of the result; The effect of the plasticizer is obviously better than that of traditional acetone extraction; the detection of PVC material and the detection of plasticizer are integrated, the plasticizer is extracted with methanol, and the film is used for material analysis, which simplifies the test steps. The invention adopts film formation after extraction to detect PVC material, which is a novel PVC material detection method.

Description

technical field [0001] The invention belongs to the technical field of PVC detection, and in particular relates to a method for detecting PVC, which can simultaneously detect plasticizers and PVC materials in PVC. Background technique [0002] The traditional method separates the detection of plasticizers in PVC from the detection of its materials. The traditional method of detecting PVC material is hot pressing film formation, which uses infrared detection. The infrared characteristic peak wave numbers of PVC are 614, 617, 695. This method is affected by the state of the PVC sample, it is not easy to be hot-pressed, and the light transmittance after film formation is poor, and it is interfered by the plasticizer, and its characteristic peak (wave number is 694) is not obvious, thus affecting the accuracy of the result judgment. The detection of plasticizers in PVC adopts gas chromatography-mass spectrometry. The traditional method uses acetone to extract PVC materials, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/06G01N30/88G01N21/3563
Inventor 白雨萍肖瑶刁洪军温家德王梓霖张英虹
Owner CHINA FIRST AUTOMOBILE
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com