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Identification of pressure-sensitive adhesive polypropylene tape
Masataka Sakayanagi1, Yaeko Konda, Kunio Watanabe
1Scientific Criminal Investigation Laboratory, Kanagawa Prefectural Police Headquarters, Yokohama, Japan.
Journal of Forensic Sciences
|February 7, 2003
Summary
This study identifies colorless, transparent polypropylene tape (PP tape) using infrared absorption spectrometry and pyrolysis gas chromatography-mass spectrometry. The methods effectively distinguish PP tape manufacturers, proving useful for forensic analysis.
Area of Science:
- Forensic Science
- Analytical Chemistry
- Materials Science
Background:
- Polypropylene tape (PP tape) is widely used, necessitating reliable identification methods.
- Distinguishing between different brands and manufacturers of PP tape is crucial for forensic investigations.
Purpose of the Study:
- To develop and validate a method for identifying colorless, transparent pressure-sensitive adhesive polypropylene tape (PP tape).
- To differentiate PP tape products based on their chemical composition and manufacturer.
Main Methods:
- Utilized infrared absorption spectrometry (IR) for spectral analysis.
- Employed pyrolysis gas chromatography-mass spectrometry (Py-GC/MS) to analyze the pressure-sensitive adhesive.
- Analyzed release agents on the tape's backside using IR spectroscopy.
Main Results:
- Twenty different colorless, transparent PP tape products were analyzed.
- IR and Py-GC/MS analysis classified the tapes into twelve distinct groups.
- IR measurement of release agents further classified tapes into fourteen groups.
- The study successfully distinguished PP tapes by manufacturer.
Conclusions:
- The developed analytical method is effective for identifying and differentiating colorless, transparent PP tapes.
- This technique provides a valuable tool for forensic casework involving PP tape evidence.
- The findings demonstrate the potential for material characterization to link evidence to its source.