CN110924229A - 一种具有抗菌性的非热封型茶叶滤纸及其生产工艺 - Google Patents
一种具有抗菌性的非热封型茶叶滤纸及其生产工艺 Download PDFInfo
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Abstract
本发明公开了一种具有抗菌性的非热封型茶叶滤纸及其生产工艺,采用未打浆漂白木浆和打浆后的漂白木浆作为主要材料,由于未打浆,有利于提高滤纸的厚度和挺度;同时,打浆后的漂白木浆可以提高纸张的强度。壳聚糖不仅具有抗菌性和保健功能,与纤维作用后可以有效加强纤维间的氢键结合,赋予纸张良好的强度,在涂布液中加入壳聚糖,采用羧甲基纤维素和壳聚糖相结合的方式对纸张进行施胶,不仅可以赋予滤纸一定的抗菌性和保健功能,还有利于提高纸张的干强度和湿强度。采用本发明方法生产的非热封茶叶滤纸,在明显降低产品生产成本的同时,还能使滤纸具有较高的强度和厚度,以及一定抗菌性能和保健功能。
Description
技术领域
本发明属于滤纸技术领域,更具体地说,尤其涉及一种具有抗菌性的非热封型茶叶滤纸及其生产工艺。
背景技术
茶叶滤纸是生产袋泡茶的重要原材料之一,分为热封型茶叶滤纸和非热封型茶叶滤纸。相较于传统散装茶叶,袋泡茶具有使用方便、饮用时定量准确的优点,在欧美国家受到广泛欢迎。
壳聚糖是甲壳素脱乙酰化的产物,在医药领域壳聚糖可以防治动脉粥硬化,治疗高脂血症,凝血和抗凝血方面有很大的作用。可以降低血清和肝脏中的胆固醇浓度,用于降胆固醇剂。壳聚糖能强化肝脏机能,防止由于过量饮酒引起的肝脏宿醉,并对残留在体内的重金属、毒素、农药、化学色素具有吸附和***的功效。壳聚糖能调节体内的pH值到弱碱性,提高胰岛素的利用率,有利于防治糖尿病。此外,它还具有调节内分泌***的功能,使胰岛素分泌正常,抑制血糖升高,降低血脂。同时,壳聚糖及其衍生物具有较好的抗菌活性,能抑制一些真菌、细菌、和病毒的生长繁殖。
茶叶滤纸主要用于茶叶的内包装使用,产品全部由植物纤维组成,由于完全采用植物纤维,产品具有纸质柔软均匀,滤水速度快,无毒、无异味,可生物降解的特点,是一种符合食品卫生标准的绿色环保产品。非热封型茶叶滤纸通过直接将两张滤纸采用机械压力的方式进行封口,而纸张紧度高、厚度低,会导致封口贴合不紧密,封口容易裂开,而降低滤纸紧度、提高滤纸厚度,滤纸在机械压力的作用下贴合更为牢固,其封口也不容易裂开。因此,非热封型茶叶滤纸需要具有较低的紧度、较高的厚度。另外,茶叶滤纸需要具有一定的干强度,以保证滤纸在后续加工过程中不断裂;还需具有一定的湿强度,以保证在冲泡过程中不破裂;茶叶滤纸还需具有一定的挺度,以保证在生产过程中不易变形。目前,国外生产的非热封茶叶滤纸,其原材料一般采用木浆和麻浆,为了保证滤纸具有较高的强度、厚度和挺度,麻浆的比例通常在40%以上,而麻浆的价格比较昂贵,会导致产品生产成本较高。另外,目前的非热封型茶叶滤纸,都是采用植物纤维为原料,然后经涂布制备而成,由于未添加抗菌组份,制成的茶叶滤纸无抗菌性。
申请人申请的中国发明专利(申请号:201610333616.X)公开了一种由纯木浆抄制非热封型本色茶叶滤纸的方法,先将未漂木浆进行疏解,调节到一定浆液浓度;然后进行漆酶氧化处理,然后添加吸附剂、PAE湿强剂等最终得到非热封型本色茶叶滤纸。申请人申请的中国发明专利(申请号:201610333457.3)公开了一种纯木浆非热封型茶叶滤纸的制备方法,先将无氯漂木浆纤维和水混合得到的浆料进行疏解;然后添加吸附剂、PAE湿强剂以及增强剂等进行处理,得到非热封型茶叶滤纸。申请人申请的中国发明专利(申请号:201210379277.0)公开了一种非热封茶叶滤纸的制造方法,将植物纤维经打浆处理,打浆度在35°SR~45°SR,充分分丝帚化后加入热固型增强剂,再经抄造得原纸成品。申请人申请的中国发明专利(申请号:201210181408.4)公开了一种非热封型茶叶滤纸生产工艺,该工艺采用质量百分比分别为67~73%和27~33%的无氯漂白针叶木浆板和马尼拉麻浆板,经过打浆、配浆、冲浆、上网抄造、脱水、前干燥、表胶、表胶后干燥、质控、成卷包装工序得以制备成形。
现有茶叶滤纸的生产工艺,主要是为了降低成本及提高滤纸强度,对滤纸的厚度并无要求,而这一性能对茶叶的后续包装是否顺利具有非常重要的影响,茶叶滤纸一般要求具有较高的厚度,这样茶叶包装时才能顺利封口。因此,茶叶滤纸在降低成本、提高强度的同时,还应保证具有较高的厚度。同时,在茶叶滤纸的生产过程中添加抗菌组份,也有利于提高茶叶的保存时间。
发明内容
本发明的目的是提供一种具有抗菌性的非热封型茶叶滤纸的生产工艺,采用木浆为原料,并用改性天然高分子材料和壳聚糖进行施胶,所制得的非热封茶叶滤纸具有较好的强度和较高的厚度,以及良好的抗菌性。
为了实现上述目的,本发明采用了以下的技术方案:一种具有抗菌性的非热封型茶叶滤纸,包括如下组份:按绝干重量计,
浆料A 60~90份
浆料B 10~40份
其中:浆料A:由漂白针叶木浆疏解后制得;浆料B:由部分浆料A经打浆后制得。
作为优选,包括如下组份:按绝干重量计,
浆料A 60~70份
浆料B 30~40份。
一种如上所述的具有抗菌性的非热封型茶叶滤纸的生产工艺,包括如下步骤:
1)将漂白针叶木浆疏解后,制备成浓度为2.0~5.0%的浆料A;
2)将部分浆料A,采用双盘磨打浆机进行打浆得到浆料B,其打浆度为40~80°SR,湿重3.0g~15g;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A60~90份,浆料B10~40份,混合浆料C浓度为0.5~2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的1.0~8.0%;
4)将羧甲基纤维素、羟基纤维素、氧化淀粉、阳离子淀粉、阴离子淀粉及壳聚糖中的一种或多种天然高分子材料加入到水中,搅拌溶解后制备成浓度为0.1~3.0%的涂布液;
5)混合浆料C通过斜网纸机成形,上网浓度为0.005~0.02%,成形得到的纸页经烘缸烘干,然后采用浸渍式涂布,然后经烘干、收卷,得到非热封型茶叶滤纸。
作为优选,步骤4)中所用的天然高分子材料为羧甲基纤维素和壳聚糖。
作为优选,壳聚糖的分子量在2000以下,按质量百分百计,羧甲基纤维素和壳聚糖的比例在2:1~10:1。
作为优选,羧甲基纤维素和壳聚糖的比例在3:1~6:1。
作为优选,步骤5)中所述烘缸为杨氏烘缸,烘缸表面温度在100~160℃。
本发明采用未打浆漂白木浆和打浆后的漂白木浆作为主要材料,由于未打浆,有利于提高滤纸的厚度和挺度;同时,打浆后的漂白木浆可以提高纸张的强度;较高的烘缸表面温度,使滤纸迅速干燥,也有利于提高滤纸的厚度。可以进一步提高滤纸的湿强和干强度。壳聚糖不仅具有抗菌性和保健功能,与纤维作用后可以有效加强纤维间的氢键结合,赋予纸张良好的强度,在涂布液中加入壳聚糖,采用羧甲基纤维素和壳聚糖相结合的方式对纸张进行施胶,不仅可以赋予滤纸一定的抗菌性和保健功能,还有利于提高纸张的干强度和湿强度。采用本发明方法生产的非热封茶叶滤纸,在明显降低产品生产成本的同时,还能使滤纸具有较高的强度和厚度,以及一定抗菌性能和保健功能,具有重大的市场前景和现实意义。
附图说明
图1为参照例2和实施例1~4的大肠杆菌的抗菌实验图。
具体实施方式
本发明提供了一种具有抗菌性的非热封型茶叶滤纸及其生产工艺,采用木浆为原料,并用改性天然高分子材料和壳聚糖进行施胶,所制得的非热封茶叶滤纸具有较好的强度和较高的厚度,以及良好的抗菌性,其具有重大的市场前景和现实意义
该具有抗菌性的非热封型茶叶滤纸,包括如下组份:按绝干重量计,
浆料A 60~90份
浆料B 10~40份
其中:浆料A:由漂白针叶木浆疏解后制得;浆料B:由部分浆料A经打浆后制得。
作为优选,该具有抗菌性的非热封型茶叶滤纸包括如下组份:按绝干重量计,
浆料A 60~70份
浆料B 30~40份。
一种如上所述的具有抗菌性的非热封型茶叶滤纸的生产工艺,包括如下步骤:
1)将漂白针叶木浆疏解后,制备成浓度为2.0~5.0%的浆料A;
2)将部分浆料A,采用双盘磨打浆机进行打浆,得到浆料B,其打浆度为40~80°SR,湿重3.0g~15g;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A60~90份,浆料B10~40份,混合浆料C浓度为0.5~2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的1.0~8.0%;
4)将羧甲基纤维素、羟基纤维素、氧化淀粉、阳离子淀粉、阴离子淀粉及壳聚糖中的一种或多种天然高分子材料加入到水中,搅拌溶解后制备成浓度为0.1~3.0%的涂布液;作为优选,所用的天然高分子材料为羧甲基纤维素和壳聚糖,且壳聚糖的分子量在2000以下,按质量百分百计,羧甲基纤维素和壳聚糖的比例在2:1~10:1,作为再优选,羧甲基纤维素和壳聚糖的比例在3:1~6:1。
5)混合浆料C通过斜网纸机成形,上网浓度为0.005~0.02%,成形得到的纸页经烘缸烘干,然后采用浸渍式涂布,然后经烘干、收卷,得到非热封型茶叶滤纸。作为优选,所述烘缸为杨氏烘缸,烘缸表面温度在100~160℃。
该具有抗菌性的非热封型茶叶滤纸的生产工艺的具体参照例和实施例如下:
参照例1
1)将漂白针叶木浆疏解后,制备成浓度为4.0%的浆料A;
2)将部分浆料A采用双盘磨打浆机打浆,打浆后的浆度为40°SR,湿重14g的浆料B;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A为60份,浆料B为40份,混合浆料C浓度为2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的4.0%;
4)混合浆料通过斜网纸机成形,上网浓度为0.005%,成形得到的纸页经烘缸烘干、收卷,得到非热封型茶叶滤纸,烘缸温度为140℃。
参照例2
1)将漂白针叶木浆疏解后,制备成浓度为4.0%的浆料A;
2)将部分浆料A采用双盘磨打浆机打浆,打浆后的浆度为40°SR,湿重14g的浆料B;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A为60份,浆料A为40份,混合浆料C浓度为2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的4.0%;
4)将羧甲基纤维素加入到水中,搅拌溶解后制备成浓度为0.5%的涂布液;
5)混合浆料通过斜网纸机成形,上网浓度为0.005%,成形得到的纸页经烘缸烘干、收卷,得到非热封型茶叶滤纸,烘缸温度为140℃。
实施例1
1)将漂白针叶木浆疏解后,制备成浓度为4.0%的浆料A;
2)将部分浆料A采用双盘磨打浆机打浆,打浆后的浆度为40°SR,湿重14g的浆料B;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A为60份,浆料B为40份,混合浆料C浓度为2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的4.0%;
4)将羧甲基纤维素和壳聚糖加入到水中,搅拌溶解后制备成浓度为0.5%的涂布液,按绝干重量计,羧甲基纤维素和壳聚糖的重量比8:1;
5)混合浆料通过斜网纸机成形,上网浓度为0.005%,成形得到的纸页经烘缸烘干,采用浸渍式涂布,涂布量为0.6g/m2,然后经烘干、收卷,得到非热封型茶叶滤纸,烘缸温度为140℃。
实施例2
1)将漂白针叶木浆疏解后,制备成浓度为4.0%的浆料A;
2)将部分浆料A采用双盘磨打浆机打浆,打浆后的浆度为40°SR,湿重14g的浆料B;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A为65份,浆料B为35份,混合浆料C浓度为2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的4.0%;
4)将羧甲基纤维素和壳聚糖加入到水中,搅拌溶解后制备成浓度为0.8%的涂布液,按绝干重量计,羧甲基纤维素和壳聚糖的重量比6:1;
5)混合浆料通过斜网纸机成形,上网浓度为0.005%,成形得到的纸页经烘缸烘干,采用浸渍式涂布,涂布量为0.6g/m2,然后经烘干、收卷,得到非热封型茶叶滤纸,烘缸温度为140℃。
实施例3
1)将漂白针叶木浆疏解后,制备成浓度为4.0%的浆料A;
2)将部分浆料A采用双盘磨打浆机打浆,打浆后的浆度为50°SR,湿重12g的浆料B;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A为70份,浆料B为30份,混合浆料C浓度为2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的4.0%;
4)将羧甲基纤维素和壳聚糖加入到水中,搅拌溶解后制备成浓度为1.2%的涂布液,按绝干重量计,羧甲基纤维素和壳聚糖的重量比6:1;
5)混合浆料通过斜网纸机成形,上网浓度为0.005%,成形得到的纸页经烘缸烘干,采用浸渍式涂布,涂布量为0.8g/m2,然后经烘干、收卷,得到非热封型茶叶滤纸,烘缸温度为140℃。
实施例4
1)将漂白针叶木浆疏解后,制备成浓度为4.0%的浆料A;
2)将部分浆料A采用双盘磨打浆机打浆,打浆后的浆度为50°SR,湿重12g的浆料B;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A为70份,浆料A为30份,混合浆料C浓度为2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的4.0%;
4)将羧甲基纤维素和壳聚糖加入到水中,搅拌溶解后制备成浓度为1.2%的涂布液,按绝干重量计,羧甲基纤维素和壳聚糖的重量比3:1;
5)混合浆料通过斜网纸机成形,上网浓度为0.005%,成形得到的纸页经烘缸烘干,采用浸渍式涂布,涂布量为0.8g/m2,然后经烘干、收卷,得到非热封型茶叶滤纸,烘缸温度为140℃。
上述各个参照例和实施例的测试数据如下:
参照图1所示,图1为对大肠杆菌的抗菌实验结果,其中S0为参照例2,S1、S2、S3、S4分别为实施例1、实施例2、实施例3、实施例4。
从图1中可以看出,只含有羧甲基纤维素的样品周围无抑菌圈,表明只经羧甲基纤维素涂布后的滤纸无抗菌性,涂布液中加入壳聚糖后,滤纸周围出现了抑菌圈,表明涂布液中加入壳聚糖后,滤纸具有良好的抗菌性。
Claims (7)
1.一种具有抗菌性的非热封型茶叶滤纸,其特征是,包括如下组份:按绝干重量计,
浆料A 60~90份
浆料B 10~40份
其中,浆料A:由漂白针叶木浆疏解后制得;浆料B:由部分浆料A经打浆后制得。
2.根据权利要求1所述的具有抗菌性的非热封型茶叶滤纸,其特征是:包括如下组份:按绝干重量计,
浆料A 60~70份
浆料B 30~40份。
3.一种如权利要求1~2任一项所述的具有抗菌性的非热封型茶叶滤纸的生产工艺,其特征在于,包括如下步骤:
1)将漂白针叶木浆疏解后,制备成浓度为2.0~5.0%的浆料A;
2)将部分浆料A,采用双盘磨打浆机进行打浆,得到浆料B,其打浆度为40~80°SR,湿重3.0g~15g;
3)将浆料A和浆料B进行混合得到混合浆料C,按绝干重量计,浆料A60~90份,浆料B10~40份,混合浆料C浓度为0.5~2.0%,同时向混合浆料C中加入PAE湿强剂,用量为混合浆料C绝干重量的1.0~8.0%;
4)将羧甲基纤维素、羟基纤维素、氧化淀粉、阳离子淀粉、阴离子淀粉及壳聚糖中的一种或多种天然高分子材料加入到水中,搅拌溶解后制备成浓度为0.1~3.0%的涂布液;
5)混合浆料C通过斜网纸机成形,上网浓度为0.005~0.02%,成形得到的纸页经烘缸烘干,然后采用浸渍式涂布,然后经烘干、收卷,得到非热封型茶叶滤纸。
4.根据权利要求3所述的具有抗菌性的非热封型茶叶滤纸的生产工艺,其特征是:步骤4)中所用的天然高分子材料为羧甲基纤维素和壳聚糖。
5.根据权利要求4所述的具有抗菌性的非热封型茶叶滤纸的生产工艺,其特征是:壳聚糖的分子量在2000以下,按质量百分百计,羧甲基纤维素和壳聚糖的比例在2:1~10:1。
6.根据权利要求5所述的具有抗菌性的非热封型茶叶滤纸的生产工艺,其特征是:羧甲基纤维素和壳聚糖的比例在3:1~6:1。
7.根据权利要求3所述的具有抗菌性的非热封型茶叶滤纸的生产工艺,其特征是:步骤5)中所述烘缸为杨氏烘缸,烘缸表面温度在100~160℃。
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