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CN107475893A - 超柔婴幼儿用湿法水刺复合非织造布及生产方法 - Google Patents

超柔婴幼儿用湿法水刺复合非织造布及生产方法 Download PDF

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CN107475893A
CN107475893A CN201710676439.XA CN201710676439A CN107475893A CN 107475893 A CN107475893 A CN 107475893A CN 201710676439 A CN201710676439 A CN 201710676439A CN 107475893 A CN107475893 A CN 107475893A
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spun lacing
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谷源明
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DALIAN RUIGUANG NONWOVEN GROUP Co Ltd
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    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
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    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
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    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
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Abstract

本发明涉及超柔婴幼儿用湿法水刺复合非织造布及生产方法,采用湿法水刺复合技术将超柔阻隔性的熔喷纤维层与纤维素短纤维层复合,下层为熔喷纤维,具有手感柔软,阻隔性好,不易变形等特点,上层为以浆粕短纤维为主的纤维素短纤维,上下两层通过高压水刺作用种植并缠结于熔喷纤维中间,采用热风式穿透烘干,并利用热轧技术,得到具有压纹花型,吸水性好,超柔软,不掉屑及单侧阻隔性等特点的非织造布复合材料。采用该非织造布复合材料制备的产品具有快速吸水、湿态超柔软手感、不易变形、能够保持厚度感、熔喷侧有效阻隔性以及无任何添加剂等优势,是普通水刺无纺布产品和卫生用纸所不可比拟的,应用前景好。

Description

超柔婴幼儿用湿法水刺复合非织造布及生产方法
技术领域
本发明涉及一种婴幼儿擦拭水刺无纺布,该无纺布由超细熔喷纤维与纤维素短纤维通过湿法工艺复合而成,属于无纺布制造领域。
背景技术
在我国每年有2000-3000万婴儿出生,0-4岁的婴幼儿消费群体约有8000万。在国家二胎生育政策的引导下,未来10-20年国内,婴儿出生率会进入一个快速增长时期,婴幼儿湿巾等用品市场也会显示出强有劲的发展前景。北美某无纺布行业协会对北美擦拭巾市场的最新分析报告称,北美擦巾市场中个人护理湿巾约占6亿美金,家居清洁擦拭巾销售额约占13亿美金,两者总共约占市场份额的50%,而婴幼儿擦拭巾占了余下的50%市场份额,可见国内外市场对婴幼儿湿巾巨大的需求量。
由于婴幼儿的排便次数和排尿次数都比较多,小屁屁经常需要擦拭。而宝宝的皮肤非常的娇嫩,一般的纸巾比较干而且很粗糙,加上纸巾生产过程必须添加一些如湿强剂等添加剂,很容易给宝宝的皮肤造成损伤,引发红肿。因此婴幼儿擦拭巾逐步成为市场中的主流。
目前市场上的大部分婴儿湿巾多是采用的“直铺工艺”水刺无纺布,湿巾很容易出现拉伸变形、变薄,容易渗透、脏手等问题。也有采用湿法成网技术生产卫生用纸,但多数需要添加湿强剂等成分保证产品强力,容易刺激皮肤,且纸巾相对粗糙,长期使用会对婴儿皮肤造成一定的伤害。因此现在需要一种能够解决上述问题的全新的婴幼儿湿巾用擦拭材料。
发明内容
为弥补现有技术的不足,本发明提供一种利用超细熔喷纤维与纤维素短纤维湿法水刺复合生产超细超柔湿法水刺复合非织造布,该产品具有快速吸液能力,布面密实,不掉绒,遮盖性好,不易变形等特点,突出优点是湿态下布面具有超细腻超柔的手感,且超细熔喷纤维具有优异的阻隔性,解决了目前婴幼儿湿巾存在的问题,是理想的婴幼儿湿巾材料。
为实现上述目的,本发明采用如下技术方案,一种超柔婴幼儿用湿法水刺复合非织造布的生产方法为:分别制备超柔阻隔性的熔喷纤维层和纤维素短纤维层,将其重叠后通过高压水刺缠结、热风穿透烘干及热轧,制得非织造布材料。
更为具体的,该非织造布的制备方法为:
(1)超柔阻隔性的熔喷纤维层的制备:采用聚丙烯或PLA作为原料,依次经过单螺杆挤出机加热熔融、过滤装置、计量泵、模头、热风牵伸及铺网后形成超细熔喷纤维,为了保证熔喷纤维伸长率和弹性,熔喷工艺进行特殊调整,得到克重为10-25g/m2超柔阻隔性的熔喷纤维层。
(2)纤维素短纤维层的制备:以2-5mm浆粕短纤维为主料,以6-12mm的粘胶纤维、天丝纤维或PLA纤维为辅料混合成浆料,其中浆粕短纤维的添加比例范围为70-100%,浆料浓度控制在0.5%-1%,冲浆泵将浆料输送至布浆器,依次经过阶梯式湍流箱、成型头和斜网成网机成网得到克重为35-75g/m2的纤维素短纤维层。其中,成网机网帘速度120-300m/min;成型头前高度1-10mm,成型头后高度150-240mm,成型头内部压力20-60mbar,成网机通过6道负压抽吸脱水,负压抽吸风机设置参数分别为20%-50%、30%-60%、40%-70%、50%-85%、50%-90%、20%-85%。
(3)高压水刺缠结:将超柔阻隔性的熔喷纤维层和纤维素短纤维层重合后通过网帘传送到水刺工序,在高压水刺作用下使纤维素短纤维直接种植于超细熔喷纤维中并进行充分缠结,每道水刺压力控制在15-85bar之间,水刺工序后进行脱水,通过负压风机抽吸对水刺网帘进行初步脱水,负压风机设置参数为60-95%。
(4)热风穿透烘干:经高压水刺缠结和初步脱水后的复合产品经过烘箱进行干燥,由于熔喷非织造布纤径细、孔隙小,具有一定的阻隔性,所以烘箱工艺要进行特殊调整,提高烘箱的整体温度,降低循环风机的设置。其主要工艺参数如下:烘箱温度设置在120-150℃,循环风机电机设置50-60%,排气风机设置80-90%。
上述制备方法还包括步骤(5):根据客户的需要选择产品行压花处理和非压花处理,热轧机温度设置在120-150℃,线压力在25N/5cm-40N/5cm。
作为优选,所述步骤(1)以聚丙烯为原料,其工艺参数如下:计量泵为12-15rpm,模头温度为260-270℃,牵伸风温度222-225℃,牵伸50%,DCD值为115-145mm。超柔阻隔性的熔喷纤维层通过退卷装置输送至水刺工序前位置。
优选的,所述步骤(3)中采用6个高压水刺装置对超柔阻隔性的熔喷纤维层和纤维素短纤维层进行水刺缠结。
本发明另一个目的请求保护采用上述方法制备的超柔婴幼儿用湿法水刺复合非织造布。
本发明采用湿法水刺复合技术将超柔阻隔性的熔喷纤维层与纤维素短纤维层复合,下层为熔喷纤维,具有手感柔软,阻隔性好,不易变形等特点,上层为以浆粕短纤维为主的纤维素短纤维,上下两层通过高压水刺作用种植并缠结于熔喷纤维中间,采用热风式穿透烘干,并利用热轧技术,得到具有压纹花型,吸水性好,超柔软,不掉屑及单侧阻隔性等特点的非织造布复合材料。采用该非织造布复合材料制备的产品具有快速吸水、湿态超柔软手感、不易变形、能够保持厚度感、熔喷侧有效阻隔性以及无任何添加剂等优势,是普通水刺无纺布产品和卫生用纸所不可比拟的,应用前景好。
具体实施方式
下面通过具体实施例详述本发明,但不限制本发明的保护范围。如无特殊说明,本发明所采用的实验方法均为常规方法,所用实验器材、材料、试剂等均可从化学公司购买。
实施例1
制备超柔阻隔性的熔喷纤维层:
以聚丙烯为原料依次经过单螺杆挤出机加热熔融、过滤装置、计量泵、模头、热风牵伸及铺网后形成超细熔喷非织造布,为了保证熔喷纤维伸长率和弹性,工艺参数如下:计量泵为13rpm,模头22个加热区温度为271℃,270℃,274℃,271℃,268℃,269℃,269℃,268℃,270℃,270℃,270℃,270℃,270℃,270℃,270℃,270℃270℃,270℃,270℃,270℃,270℃,270℃;牵伸风温度240℃,DCD值为150mm。超柔阻隔性的熔喷纤维层通过退卷装置输送至水刺工序前位置。
制备纤维素短纤维层:采用2-5mm浆粕短纤70%配比,根据产品需要可添加6-12mm的其它纤维素纤维30%,如粘胶纤维、天丝纤维、PLA纤维等,将其混合成浓度0.05%的浆料;冲浆泵将浆料输送至布浆器,经过阶梯成湍流、成型头和斜网成网机成网,成网网帘速度在120-300m/min;成型头前高度1-10mm,成型头后高度150-240mm,成网机内部压力20-60mbar,成网机通过6道负压抽吸进行脱水,负压抽吸风机设置分别为50%、50%、70%、70%、75%、85%。
高压水刺复合:将湿法纤维素短纤维层与超柔阻隔性的熔喷纤维层重合后通过网帘传送送到水刺工序,在6个高压水刺作用下将短纤维直接种植于超细熔喷纤维中并进行充分缠结。每道水刺压力根据克重和位置分别控制在15-85bar之间,水刺机后面配置脱水网帘对复合材料进行初步脱水,两个脱水风机设置在60-95%。
热风穿透烘干:将充分缠结后的复合材料经过烘箱进行干燥,烘箱温度设置在120-150℃,循环风机电机运转率50-60%,排气风机设置80-90%。
热轧压花工艺:根据客户的需要选择产品行压花处理,热轧机温度设置在120-150℃,线压力在25N/5cm-40N/5cm。
实施例2
制备超柔阻隔性的熔喷纤维层:
以聚丙烯为原料依次经过单螺杆挤出机加热熔融、过滤装置、计量泵、模头、热风牵伸及铺网后形成超细熔喷非织造布,为了保证熔喷纤维伸长率和弹性,工艺参数如下:计量泵为13rpm,模头22个加热区温度为271℃,270℃,274℃,271℃,268℃,269℃,269℃,268℃,270℃,270℃,270℃,270℃,270℃,270℃,270℃,270℃270℃,270℃,270℃,270℃,270℃,270℃;牵伸风温度240℃,DCD值为150mm。超柔阻隔性的熔喷纤维层通过退卷装置输送至水刺工序前位置。
制备纤维素短纤维层:采用2-5mm浆粕短纤维,添加比例为100%,将其混合成浓度0.05%的浆料;冲浆泵将浆料输送至布浆器,经过阶梯成湍流、成型头和斜网成网机成网,成网网帘速度在120-300m/min;成型头前高度1-10mm,成型头后高度150-240mm,成网机内部压力20-60mbar,成网机通过6道负压抽吸进行脱水,负压抽吸风机设置分别为50%、50%、60%、70%、75%、85%。
高压水刺复合:将湿法纤维素短纤维层与超柔阻隔性的熔喷纤维层重合后通过网帘传送送到水刺工序,在6个高压水刺作用下将短纤维直接种植于超细熔喷纤维中并进行充分缠结。每道水刺压力根据克重和位置分别控制在15-85bar之间,水刺机后面配置脱水网帘对复合材料进行初步脱水,两个脱水风机设置在60-95%。
热风穿透烘干:将充分缠结后的复合材料经过烘箱进行干燥,烘箱温度设置在120-150℃,循环风机电机运转率50-60%,排气风机设置80-90%。
热轧压花工艺:根据客户的需要选择产品行压花处理,热轧机温度设置在120-150℃,线压力在25N/5cm-40N/5cm。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明披露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。

Claims (7)

1.超柔婴幼儿用湿法水刺复合非织造布的生产方法,其特征在于,分别制备超柔阻隔性的熔喷纤维层和纤维素短纤维层,将其重叠后通过高压水刺缠结、热风穿透烘干及热轧,制得非织造布材料,所述的超柔阻隔性的熔喷纤维层克重为10-25g/m2;所述的纤维素短纤维层克重为35-75g/m2是以2-5mm浆粕短纤维为主料,以6-12mm的粘胶纤维、天丝纤维或PLA纤维为辅料混合成浆料,依次经过阶梯式湍流箱、成型头和斜网成网机成网得到的。
2.根据权利要求1所述的超柔婴幼儿用湿法水刺复合非织造布的生产方法,其特征在于,包括以下步骤:
(1)超柔阻隔性的熔喷纤维层的制备:采用聚丙烯或PLA作为原料,依次经过单螺杆挤出机加热熔融、过滤装置、计量泵、模头、热风牵伸及铺网后形成超细熔喷纤维;
(2)纤维素短纤维层的制备:以2-5mm浆粕短纤维为主料,以6-12mm的粘胶纤维、天丝纤维或PLA纤维为辅料混合成浆料,其中浆粕短纤维的添加比例范围为70-100%,浆料浓度控制在0.5%-1%,冲浆泵将浆料输送至布浆器,依次经过阶梯式湍流箱、成型头和斜网成网机成网得到克重为35-75g/m2的纤维素短纤维层;
(3)高压水刺缠结:将超柔阻隔性的熔喷纤维层和纤维素短纤维层重合后通过网帘传送到水刺工序,每道水刺压力控制在15-85bar之间,水刺工序后进行脱水,通过负压风机抽吸对水刺网帘进行初步脱水,负压风机设置参数为60-95%;
(4)热风穿透烘干:经高压水刺缠结和初步脱水后的复合产品经过烘箱进行干燥,烘箱温度设置在120-150℃,循环风机电机设置50-60%,排气风机设置80-90%。
3.根据权利要求2所述的超柔婴幼儿用湿法水刺复合非织造布的生产方法,其特征在于,还包括步骤(5):根据客户的需要选择产品行压花处理和非压花处理,热轧机温度设置在120-150℃,线压力在25N/5cm-40N/5cm。
4.根据权利要求2所述的超柔婴幼儿用湿法水刺复合非织造布的生产方法,其特征在于,所述步骤(2)中成网机网帘速度120-300m/min;成型头前高度1-10mm,成型头后高度150-240mm,成型头内部压力20-60mbar,成网机通过6道负压抽吸脱水,负压抽吸风机设置参数分别为20%-50%、30%-60%、40%-70%、50%-85%、50%-90%、20%-85%。
5.根据权利要求2所述的超柔婴幼儿用湿法水刺复合非织造布的生产方法,其特征在于,所述步骤(1)以聚丙烯为原料,其工艺参数如下:计量泵为12-15rpm,模头温度为260-270℃,牵伸风温度222-225℃,牵伸50%,DCD值为115-145mm。
6.根据权利要求2所述的超柔婴幼儿用湿法水刺复合非织造布的生产方法,其特征在于,所述步骤(3)中采用6个高压水刺装置对超柔阻隔性的熔喷纤维层和纤维素短纤维层进行水刺缠结。
7.一种超柔婴幼儿用湿法水刺复合非织造布是采用权利要求1的方法制备的。
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