Evaluation of Peel Strength of Heat-Sealed Polylactic Acid Packages Using Laser Photoelasticity
デジタルデータあり（科学技術振興機構）
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- 資料種別
- 記事
- 著者・編者
- Kenji GOMIMasashi NITANDA
- タイトル（掲載誌）
- Advanced experimental mechanics / Editorial board for advanced experimental mechanics [編]
- 巻号年月日等（掲載誌）
- 9:2024.8
- 掲載巻
- 9
- 掲載ページ
- 26-31
- 掲載年月日（W3CDTF）
- 2024-08
- ISSN（掲載誌）
- 2189-4752
- ISSN-L（掲載誌）
- 2189-4752
- 出版事項（掲載誌）
- Niigata : The Japanese Society for Experimental Mechanics
- 出版地（国名コード）
- JP
- 本文の言語コード
- eng
- 件名標目
- NDLC
- 対象利用者
- 一般
- 所蔵機関
- 国立国会図書館
- 請求記号
- Z63-D560
- 連携機関・データベース
- 国立国会図書館 : 国立国会図書館雑誌記事索引
- 書誌ID（NDLBibID）
- 033783743
- 整理区分コード
- 632
- 要約等
- <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
- オンライン閲覧公開範囲
- インターネット公開
- 連携機関・データベース
- 科学技術振興機構 : J-STAGE
- 要約等
- <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
- 連携機関・データベース
- 国立情報学研究所 : CiNii Research
- 提供元機関・データベース
- Japan Link Center雑誌記事索引データベース
- 書誌ID（NDLBibID）
- 033783743