生活用纸保质期评价方法及规律探讨

2021-09-21 01:04:52陈春霞白静静赖毅东汪代锟刘嘉慧徐梅英赵俭邓健信
中国造纸 2021年12期

陈春霞 白静静 赖毅东 汪代锟 刘嘉慧 徐梅英 赵俭 邓健信

摘要:本研究探讨了生活用纸的菌落总数及关键物理指标(强度、吸水性等)随存放时间的变化规律,以科学评价生活用纸的保质期。通过观察加速老化及自然存放得到的细菌菌落总数变化量推导出微生物指标稳定期计算模型,按照计算模型或 GB 15979—2002中的稳定性评价方法,可推算细菌菌落总数超标的保质期。物理性能随老化周期变化不明显,擦手纸、厨房纸巾、纸巾纸的横向吸液高度及纵向湿抗张强度出现一定衰减,但抗张强度及柔软度稳定。相对于物理指标,微生物指标是影响保质期的关键因素。

关键词:生活用纸;微生物指标;物理性能;保质期

中图分类号:TS761.6   文献标识码:A    DOI:10.11980/j. issn.0254-508X.2021.12.008

Research on Evaluation Method and Law of Quality Shelf Life for Tissue Paper

CHEN Chunxia*   BAI Jingjing  LAIYidong  WANG Daikun  LIU JiahuiXU Meiying  ZHAO Jian  DENG Jianxin

(National Paper Products Quality Supervision Inspection Center,Dongguan Quality Supervision Testing Center,Dongguan,Guangdong Province,523808)

(*E-mail:jane01212000@126. com)

Abstract :The change law of the total number of colonies and the key physical indexes (strength,water absorption,etc.) with time was ex? plored 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 calculat ? ed. 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 basical? ly stable. Compared to physical properties,the microbial indicators were the key factors affecting the shelf life .

Key words :tissue paper;microbial indicators;physical property;shelf life

生活用纸是和人们日常生活息息相关的一类造纸产品,其包含用来擦拭口、脸部、手部等人体皮肤的纸巾纸(如面巾纸、餐巾纸、手帕纸、擦手纸等),用于如厕后使用的卫生纸及厨房纸巾等纸制品。生活用纸的产品质量尤其卫生指标对消费者的身体健康有直接影响,卫生指标出现不稳定、微生物超标不合格时将给人体健康带来危害,因此生活用纸有一定的保质期要求。

产品的保质期是指产品在正常条件下的质量保证期限。在保质期内,产品的生产企业对该产品质量符合有关标准或明示担保的质量条件负责。目前關于保质期的评价几乎都是围绕食品。根据 GB 7718—2011《食品安全国家标准预包装食品标签通则》规定,保质期是指食品在标签指明的贮存条件下,保持品质的期限。……

登录APP查看全文