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| Research on Evaluation Method and Law of Quality Shelf Life for Tissue Paper |
| Received:June 12, 2021 |
| DOI：10.11980/j.issn.0254-508X.2021.12.008 |
| Key Words:tissue paper microbial indicators physical property shelf life |
| Fund Project:省局科技项目——生活用纸保质期评价方法系统研究（2020ZZ12）。 |
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| Abstract:The change law of the total number of colonies and the key physical indexes （strength， water absorption， etc.） with time was explored to scientifically evaluate the shelf life of tissue paper. The calculation model of stable period of microbial index was derived based on the variation amount of total bacterial colony quantity obtained by accelerated aging and natural storage. According to the calculation model or referring to stability evaluation method in GB 15979—2002， the shelf life of the total superstable of bacterial colonies could be calculated. The results showed that the physical properties had no obvious change with the aging period. The water absorption height of CD and wet tensile strength of MD of hand towel， kitchen towel and facial tissue had a certain attenuation， but tensile strength and softness kept basically stable. Compared to physical properties， the microbial indicators were the key factors affecting the shelf life. |
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