Evaluation of Peel Strength of Heat-Sealed Polylactic Acid Packages Using Laser Photoelasticity
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- Material Type
- 記事
- Title
- Author/Editor
- Kenji GOMIMasashi NITANDA
- Author Heading
- Periodical title
- Advanced experimental mechanics / Editorial board for advanced experimental mechanics [編]
- No. or year of volume/issue
- 9:2024.8
- Volume
- 9
- Pages
- 26-31
- Publication date of volume/issue (W3CDTF)
- 2024-08
- ISSN (Periodical Title)
- 2189-4752
- ISSN-L (Periodical Title)
- 2189-4752
- Publication (Periodical Title)
- Niigata : The Japanese Society for Experimental Mechanics
- Place of Publication (Country Code)
- JP
- Text Language Code
- eng
- Subject Heading
- NDLC
- Target Audience
- 一般
- Holding library
- 国立国会図書館
- Call No.
- Z63-D560
- Data Provider (Database)
- 国立国会図書館 : 国立国会図書館雑誌記事索引
- Bibliographic ID (NDL)
- 033783743
- Bibliographic Record Category (NDL)
- 632
- Summary, etc.
- <p>Currently, there is no technology that facilitates the nondestructive and contact-free estimation of the peel load of the heat seals of food and other packages in the production line. To address this gap, this study proposed a method using laser photoelasticity. Considering the environmental impact of plastics, biodegradable resin polylactic acid was selected as a sample, and the optical retardations of the sealed section of the specimens were measured by changing the seal temperature in the range of 80–105 ºC. The specimens were then peeled off using a tensile tester, and the loads were recorded. The relationships among the optical retardation, peel load and sealing temperature exhibit dependence on the combination of the machine direction (MD) (direction in which the resin film is stretched during manufacturing) and the direction of the sealing line. This was because the polymer chains were oriented in the MD in advance, and the orientation changed along the sealing line owing to temperature and pressure caused by heat sealing. The MD and sealing temperature at the manufacturing site are known; therefore, it was suggested that it should be possible to obtain a rough estimate of the peel strength using the photoelastic method. However, care would have to be taken, because the estimation accuracy might reduce, further depending on the combination of the MD and seal line.</p>
- DOI
- 10.11395/aem.24-0004
- Access Restrictions
- インターネット公開
- Data Provider (Database)
- 科学技術振興機構 : J-STAGE
- Summary, etc.
- <p>Currently, there is no technology that facilitates the nondestructive and contact-free estimation of the peel load of the heat seals of food and other packages in the production line. To address this gap, this study proposed a method using laser photoelasticity. Considering the environmental impact of plastics, biodegradable resin polylactic acid was selected as a sample, and the optical retardations of the sealed section of the specimens were measured by changing the seal temperature in the range of 80–105 ºC. The specimens were then peeled off using a tensile tester, and the loads were recorded. The relationships among the optical retardation, peel load and sealing temperature exhibit dependence on the combination of the machine direction (MD) (direction in which the resin film is stretched during manufacturing) and the direction of the sealing line. This was because the polymer chains were oriented in the MD in advance, and the orientation changed along the sealing line owing to temperature and pressure caused by heat sealing. The MD and sealing temperature at the manufacturing site are known; therefore, it was suggested that it should be possible to obtain a rough estimate of the peel strength using the photoelastic method. However, care would have to be taken, because the estimation accuracy might reduce, further depending on the combination of the MD and seal line.</p>
- DOI
- 10.11395/aem.24-0004
- Related Material (URI)
- Data Provider (Database)
- 国立情報学研究所 : CiNii Research
- Original Data Provider (Database)
- Japan Link Center雑誌記事索引データベース
- Bibliographic ID (NDL)
- 033783743