CN114960267A - 一种利用双层高透成形纸螺旋包裹的气凝胶滤棒 - Google Patents
一种利用双层高透成形纸螺旋包裹的气凝胶滤棒 Download PDFInfo
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Abstract
本发明公开了一种利用双层高透成形纸螺旋包裹的气凝胶滤棒,气凝胶滤棒采用双层高透成形纸半错层复合后再与多孔气凝胶滤棒中轴线成30°或45°的角度进行螺旋包裹并粘合而成,高透成形纸是由魔芋多糖、普鲁兰多糖、聚乳酸纤维的平针叶木浆,经过原料混配、碎解打浆、施胶配浆、除渣稳浆、抄造烘干后制备得到;多孔气凝胶滤棒由魔芋、明胶、淀粉,经过水溶、圆柱模具挤压、冷冻干燥制备得到。本申请通过高透成形纸包裹的螺旋式粘合,提升了滤棒的强度,提升了卷烟抽吸过程中的舒适感与轻松感,可以保持气凝胶滤棒在抽吸过程中的稳定形态,提升滤棒的唇端触感与抽吸体验。
Description
技术领域
本发明涉及卷烟滤棒技术领域,特别涉及一种利用双层高透成形纸螺旋包裹的气凝胶滤棒。
背景技术
在卷烟的设计过程中,卷烟滤棒是制造过滤嘴卷烟的重要材料,通过直接拦截、惯性碰撞、扩散沉积等方式过滤烟气微粒,由于滤棒对烟气各个组分的截留效率差异使得烟气组成的量有所减少,同时质也发生了变化。卷烟滤棒的设计主要受两方面的影响:一是卷烟滤材、成形纸材料的设计与选用;二是滤棒稀释度的设计。其中,滤棒成形纸是包裹滤棒的专用纸,高透成形纸则对透气度有明确的要求,通风滤棒常采用高透成形纸以保证卷烟减害降焦的效果。现有高透成形纸仅考虑包裹效果与通风率设计,硬度较差,且在包裹硬度较差的滤棒时无法提升滤棒的硬度,在分段切割等过程中存在由于滤棒硬度引发的易形变、加工难度大等问题。
卷烟抽吸过程中,烟气通过滤棒进入口腔的过程中,会存在烟气中有害成分的截留效率低、滤棒触感温度较高等缺点。常规的滤棒由成形纸平行卷制,单层成形纸的吸热效率差、包裹滤棒的硬度差,因此在使用过程中存在滤棒硬度差、切割时容易变形、滤棒在抽吸过程中极易出现热塌陷现象,热稳定性不足。同时常规滤棒采用的醋酸纤维丝束,存在降解率低、易对环境造成污染等缺点。
因此,如何开发一种有吸热功能的成形纸、利用其包裹角度的设计增加滤棒的硬度、开发具有高过滤效率、高吸热功能且可降解的滤棒,避免出现热塌陷,提升抽吸过程中唇端触觉体验的新型滤棒成为了亟待解决的问题。
发明内容
本发明所要解决的技术问题是提供一种利用双层高透成形纸螺旋包裹的气凝胶滤棒,其克服了现有技术的上述缺陷。
本发明所要解决的技术问题是通过以下技术方案来实现的:
一种利用双层高透成形纸螺旋包裹的气凝胶滤棒,所述气凝胶滤棒采用双层高透成形纸半错层复合后再与多孔气凝胶滤棒中轴线成30°或45°的角度进行螺旋包裹并粘合而成,所述高透成形纸是由魔芋多糖、普鲁兰多糖、聚乳酸纤维的平针叶木浆,经过原料混配、碎解打浆、施胶配浆、除渣稳浆、抄造烘干后制备得到;所述多孔气凝胶滤棒由魔芋、明胶、淀粉,经过水溶、圆柱模具挤压、冷冻干燥制备得到。最终的气凝胶滤棒的透气度为4000~7000CU,滤棒硬度为90%~94%,方便切割、不易变形、降解率高。
优选地,上述技术方案中,所述高透成形纸的制备方法包括以下步骤:
(1)原料混配:选用平均长度4.3mm、平均宽度35.8μm的针叶木浆纤维作为基础配浆,将魔芋多糖、普鲁兰多糖、聚乳酸纤维3种多糖按针叶木浆绝干纤维质量的12%、5%、10%的比例添加作为原料;
(2)碎解打浆:将步骤(1)中混配后的原料利用水力碎浆机将纤维碎解为打浆度19°SR的复合多糖针叶木浆;
(3)施胶配浆:将步骤(2)碎解打浆后的浆料导送至配浆池,将CMC与AKD按1:1比例混合后加入配浆池中均匀混合;
(4)除渣稳浆:将步骤(3)混配好的浆料经除渣器除渣、稳浆器稳浆,再利用白水槽和冲浆泵冲浆,获得待抄造白纸浆;
(5)抄造烘干:在菱形网抄造机上抄造成型,压榨机脱水、烘干器烘干,施胶、回烘干器二次烘干、利用卷纸机、复卷机进行卷制成卷的成形纸。
优选地,上述技术方案中,步骤(2)中,选用双盘同向锥形磨浆机对混合纤维进行打浆、疏解。
优选地,上述技术方案中,步骤(3)中,选用添加质量分数占比为0.4%~0.5%的CMC与AKD按1:1比例混合的施胶剂作为浆内施胶剂。
优选地,上述技术方案中,步骤(5)中,表面施胶剂选用PVA对纸的表面施胶处理。
优选地,上述技术方案中,步骤(5)中,烘干器的表面温度为55℃~65℃;烘干器二次烘干温度为120℃~130℃。
优选地,上述技术方案中,所述多孔气凝胶滤棒是将魔芋、明胶、淀粉按比例进行配比,经过水溶、圆柱模具挤压、冷冻干燥制备得到孔隙均匀的多孔气凝胶滤棒。
优选地,上述技术方案中,魔芋、明胶、淀粉的质量比为2:5:6,所述多孔气凝胶滤棒的密度为51~54g/cm3,孔隙率为85~90%。
该双层成形纸包裹方式有效提升了滤棒硬度,提升了滤棒的加工性能。
一种卷烟,所述卷烟包含利用双层高透成形纸螺旋包裹的气凝胶滤棒。
本发明上述技术方案,具有如下有益效果:
本申请通过高透成形纸包裹的螺旋式粘合,提升了滤棒的强度,解决了气凝胶滤棒经成形纸包裹后硬度较低、降解率较低、滤棒触感温度较高等问题,提升了卷烟抽吸过程中的舒适感与轻松感,双层成形纸螺旋的卷制避免了常规气凝胶采用普通成形纸普遍会出现的硬度差、易热塌陷等问题,可以保持气凝胶滤棒在抽吸过程中的稳定形态,提升滤棒的唇端触感与抽吸体验。
本申请的双层成形纸包裹方式有效提升了滤棒硬度,提升了滤棒的加工性能。滤棒的透气度为4000~7000CU,滤棒硬度为90%~94%,方便切割且不易变形。气凝胶滤棒的降解性特征为:在温度为40℃、相对湿度为20%、土壤pH值为8.0、降解时间为28天的条件下可达到的降解失重率大于84.3%。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例,并且连同其说明一起用于解释本发明的原理。
图1为高透复合多糖成形纸的制备工艺流程图。
图2为成形纸的横向剖面的扫描电镜图。
图3为滤棒的多孔纤维结构的扫描电镜图。
图4为双层成形纸半错层复合的结构示意图。
图5为双层成形纸螺旋包裹滤棒的结构示意图。
图6为气凝胶滤棒的TG-DTG曲线图。
图7为双层成形纸螺旋包裹滤棒的实际效果图。
图8为实施例28天降解后的堆肥容器内装有成形纸包裹的滤棒样品外观。
附图标记:1-双层复合成形纸;11-上层成形纸;12-下层成形纸;13-粘接线;2-多孔气凝胶滤棒。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到:除非另外具体说明,否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
如图1所示,本实施例为所述制备步骤为:添加魔芋多糖、普鲁兰多糖、聚乳酸纤维、淀粉多糖的平针叶木浆为原料制备的定量高于22g/m2、抗张能量吸收值大于11.5J/m2,抗张强度大于1.2kN/m,透气度为10000CU,透气度变异系数小于5%。
复合多糖高透成形纸的生产方法,包括以下5个步骤:
(1)原料混配:选用平均长度4.3mm平均宽度35.8μm的针叶木浆纤维作为基础配浆,将魔芋多糖、普鲁兰多糖、聚乳酸纤维3种多糖按针叶木浆绝干纤维质量的12%、5%、10%的比例添加作为原料。
(2)碎解打浆:将步骤(1)中混配后的原料选用双盘同向锥形磨浆机对混合纤维进行打浆、疏解,将纤维碎解为打浆度19°SR的复合多糖针叶木浆。
(3)施胶配浆:将步骤(2)碎解打浆后的浆料导送至配浆池,将质量分数占比为0.4%~0.5%的CMC与AKD按1:1比例混合后加入配浆池中搅拌均匀。
(4)除渣稳浆:将步骤(3)混配好的浆料经除渣器除渣、稳浆器稳浆,再利用白水槽和冲浆泵冲浆,获得待抄造白纸浆。
(5)抄造烘干:在菱形网抄造机上抄造成型,压榨机脱水、烘干器烘干,施胶、回烘干器二次烘干、前烘缸的表面温度60℃,后续烘缸干燥温度控制在125℃。利用卷纸机、复卷机进行卷制成卷的成形纸。
本发明成形纸的横向剖面的扫描电镜图如图2所示,按本发明工艺制备的成形纸微观结构均匀分布且孔径均一。
以魔芋、明胶、淀粉按质量分数2:5:6的比例进行配比作为气凝胶滤棒的原料,经过水溶、圆柱模具挤压、冷冻干燥等环节制备得到孔隙均匀,密度为52g/cm3,孔隙率为87%的气凝胶滤棒。
如图3所示,气凝胶滤棒的孔径较小,分布较均匀,结构较为致密。在体系中魔芋多糖、明胶、淀粉分子链分别水合、互穿,在冷冻过程中,冰晶的生长会将溶质分子挤压到冰晶体的间隙,在冰晶体外形成膜层,当浓度越高时,膜层越厚越完整,形成的冰晶就越小,冻干后留下的孔壁也更趋完整。
如图4所示,将成形纸包裹多孔气凝胶滤棒的方法采用双层半错层复合(双层复合成形纸1包括上层成形纸11和下层成形纸12,相邻的双层成形纸之间具有粘接线13,多孔气凝胶滤棒2被双层复合成形纸1包裹)。如图5所示将复合后的双层成形纸以与滤棒中轴线成30°(实施例1)或45°(实施例2)的角度进行螺旋包裹并粘合。
对比滤棒芯材均为本发明的多孔气凝胶滤棒的普通成形纸单层螺旋包裹滤棒、普通成形纸常规平行包裹滤棒。其透气度硬度如表1所示。结果显示,本发明实施例1滤棒的在保证透气度的同时,提升了滤棒硬度,提升了滤棒的加工性能,避免了后续的分切加工中可能出现的滤棒变形等问题。
表1不同成形纸与包裹方式滤棒对比(10次测量均值)
本申请的气凝胶滤棒的热稳定性如图6的热重TG曲线所示。本申请的复合多糖气凝胶材料的热失重经历四个过程:
第一步,在100℃以下,失重约0.1%,这部分失重是由于复合多糖气凝胶脱除自由水所致,这与DTG曲线的第一个峰值94.3℃较为吻合。
第二步,在100℃~271.2℃,失重约1.3%,这部分失重可能是复合多糖气凝胶脱除其分子中的结合水所致。
第三步,在271.2℃~361.8℃,失重约70.0%,这部分失重为复合多糖气凝胶的魔芋多糖、聚乳酸和淀粉在氮气环境下发生了分解,可释放出CO2、CO、乙醛、呋喃、和2-甲基呋喃等小分子,为主要失重阶段。
第四步,361.8℃~600℃,失重约4.2%,随着温度的继续升高,样品完全分解为CO2、H2O等小分子,以气体形态进行逸散,剩下灰分,重量逐渐趋近初重的20%。
可以看出复合多糖气凝胶样品在200℃以内,没有出现分解,在此温度下材料热稳定性好。超过270℃后,复合多糖气凝胶样品材开始分解。由于滤棒分切加工温度一般小于40℃,卷烟主流烟气的温度一般为40~50℃,即复合多糖气凝胶滤棒在加工过程中或在卷烟抽吸过程中能保持稳定的形态,热稳定性良好。
本申请的滤棒的降解后宏观图片如图7所示,本发明的气凝胶滤棒的降解性特征为:在温度为40℃、相对湿度为20%、土壤pH值为8.0、降解时间为28天的条件下降解失重率大于89%。详情见表2。
表2本发明实施例与对照例的降解失重率(%)
本申请通过高透成形纸包裹的螺旋式粘合,提升了滤棒的强度,解决了气凝胶滤棒经成形纸包裹后硬度较低、降解率较低、滤棒触感温度较高等问题,提升了卷烟抽吸过程中的舒适感与轻松感,双层成形纸螺旋的卷制避免了常规气凝胶采用普通成形纸普遍会出现的硬度差、易热塌陷等问题,可以保持气凝胶滤棒在抽吸过程中的稳定形态,提升滤棒的唇端触感与抽吸体验。
虽然本发明已以实施例公开如上,然其并非用于限定本发明,任何本领域技术人员,在不脱离本发明的精神和范围内,均可作各种不同的选择和修改,因此本发明的保护范围由权利要求书及其等同形式所限定。
Claims (9)
1.一种利用双层高透成形纸螺旋包裹的气凝胶滤棒,其特征在于,所述气凝胶滤棒采用双层高透成形纸半错层复合后再与多孔气凝胶滤棒中轴线成30°或45°的角度进行螺旋包裹并粘合而成,所述高透成形纸是由魔芋多糖、普鲁兰多糖、聚乳酸纤维、淀粉多糖的平针叶木浆,经过原料混配、碎解打浆、施胶配浆、除渣稳浆、抄造烘干后制备得到;所述多孔气凝胶滤棒由魔芋、明胶、淀粉,经过水溶、圆柱模具挤压、冷冻干燥制备得到。
2.根据权利要求1所述的利用双层高透成形纸螺旋包裹的气凝胶滤棒,其特征在于,所述高透成形纸的制备方法包括以下步骤:
(1)原料混配:选用平均长度4.3mm、平均宽度35.8μm的针叶木浆纤维作为基础配浆,将魔芋多糖、普鲁兰多糖、聚乳酸纤维3种多糖按针叶木浆绝干纤维质量的12%、5%、10%的比例添加作为原料;
(2)碎解打浆:将步骤(1)中混配后的原料利用水力碎浆机将纤维碎解为打浆度19°SR的复合多糖针叶木浆;
(3)施胶配浆:将步骤(2)碎解打浆后的浆料导送至配浆池,将CMC与AKD按1:1比例混合后加入配浆池中均匀混合;
(4)除渣稳浆:将步骤(3)混配好的浆料经除渣器除渣、稳浆器稳浆,再利用白水槽和冲浆泵冲浆,获得待抄造白纸浆;
(5)抄造烘干:在菱形网抄造机上抄造成型,压榨机脱水、烘干器烘干,施胶、回烘干器二次烘干、利用卷纸机、复卷机进行卷制成卷的成形纸。
3.根据权利要求2所述的利用双层高透成形纸螺旋包裹的气凝胶滤棒,其特征在于,步骤(2)中,选用双盘同向锥形磨浆机对混合纤维进行打浆、疏解。
4.根据权利要求2所述的利用双层高透成形纸螺旋包裹的气凝胶滤棒,其特征在于,步骤(3)中,选用添加质量分数占比为0.4%~0.5%的CMC与AKD按1:1比例混合的施胶剂作为浆内施胶剂。
5.根据权利要求2所述的利用双层高透成形纸螺旋包裹的气凝胶滤棒,其特征在于,步骤(5)中,表面施胶剂选用PVA对纸的表面施胶处理。
6.根据权利要求2所述的利用双层高透成形纸螺旋包裹的气凝胶滤棒,其特征在于,步骤(5)中,烘干器的表面温度为55℃~65℃;烘干器二次烘干温度为120℃~130℃。
7.根据权利要求1所述的利用双层高透成形纸螺旋包裹的气凝胶滤棒,其特征在于,所述多孔气凝胶滤棒是将魔芋、明胶、淀粉按比例进行配比,经过水溶、圆柱模具挤压、冷冻干燥制备得到孔隙均匀的多孔气凝胶滤棒。
8.根据权利要求7所述的利用双层高透成形纸螺旋包裹的气凝胶滤棒,其特征在于,魔芋、明胶、淀粉的质量比为2:5:6,所述多孔气凝胶滤棒的密度为51~54g/cm3,孔隙率为85~90%。
9.一种卷烟,其特征在于,所述卷烟包含权利要求1-7任一所述的利用双层高透成形纸螺旋包裹的气凝胶滤棒。
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