CN113183555B - 一种透气、干爽的双层无纺布及其加工工艺 - Google Patents
一种透气、干爽的双层无纺布及其加工工艺 Download PDFInfo
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- CN113183555B CN113183555B CN202110443182.XA CN202110443182A CN113183555B CN 113183555 B CN113183555 B CN 113183555B CN 202110443182 A CN202110443182 A CN 202110443182A CN 113183555 B CN113183555 B CN 113183555B
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Abstract
本发明公开了一种透气、干爽的双层无纺布及其加工工艺,本发明是将表层与底层经热风复合而得,其中,表层是将棉纤维进行疏水改性后,经开松、梳理、成网、机械打孔而得,故表层具有良好的疏水性,机械打孔后起到导流作用,使得水分迅速下渗而不返渗,使得产品表面透气、干爽;底层是棉纤维进行亲水改性后,经开松、梳理、成网而得,故底层具有良好的亲水性,可以迅速吸收下渗的水分,使得产品表面透气并保持干爽。
Description
技术领域
本发明涉及非织造布技术领域,特别是涉及一种透气、干爽的双层无纺布及其加工工艺。
背景技术
纯棉水刺无纺布是用天然纤维纯棉,通过开棉、松棉,利用尖端梳理机和铺网机及牵伸机将纯棉整理成网后,利用加压后形成的大密度众多的针状水柱,经过水刺机促成棉纤维缠结成布。从原棉到成布仅用5分钟时间,比传统织造布省出了纺纱、织布环节,缩短了工时,大量节约了能耗、人工和设备,低碳环保,节能减排,降低成本30%左右。纯棉水刺无纺布在医疗卫生用品、干湿揩布、家庭卫生用品、个人护理用品等领域具有非常广泛的应用。
但是纯棉水刺无纺布潮湿感明显,不够干爽,透气性不够理想。专利申请CN111691059A公开了一种轻薄型无纺布,先配置棉纤维、清花梳理铺网,得棉纤维网;然后对棉纤维网进行一次水刺制得水刺无纺布;再将经一次水刺的无纺布导入碱液槽中进行丝光处理,轧液后导出煮漂清洗;接着将丝光后的无纺布带水浸渍在常温的纤维素离子液体溶液中,轧液后二次水刺、烘干;最后水洗,二次烘干,得到轻薄型无纺布成品。该产品的特点是比较轻薄,具有吸湿性,但是会反渗,导致无纺布表面不干爽。再生纤维素滞留在无纺布的棉网中形成粘结点,也会影响无纺布的透气性。
发明内容
本发明的目的在于提供一种透气、干爽的双层无纺布及其加工工艺,本发明所制备的双层无纺布表面干爽,透气性佳,具有很好的应用价值。
为实现上述目的,本发明是通过如下方案实现的:
一种透气、干爽的双层无纺布的加工工艺,是将表层与底层经热风复合而成,其中,表层是通过以下方法制备得到的:
(A)先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,得到预改性棉纤维;
(B)接着将预改性棉纤维利用甲基丙烯酸十二氟庚酯和1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐进行表面接枝聚合反应,得到疏水改性棉纤维;
(C)最后将疏水改性棉纤维经开松、梳理、成网、机械打孔,得到表层;
所述底层是通过以下方法制备得到的:
(a)先将丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜加入质量浓度1~2%透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;
(b)然后将棉纤维加入浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;
(c)最后将亲水改性棉纤维经开松、梳理、成网,得到底层。
优选的,无纺布的整体厚度为2~3mm,表层克重为10~15g/m2,底层克重为18~25g/m2。
优选的,热风复合的工艺条件为:热风温度为150~170℃,风机频率为30~40Hz,线速度为80~100m/min。
优选的,以重量份计,步骤(A)的具体方法为:先将1份棉纤维加入5~7份质量浓度3~5%3-巯丙基三乙氧基硅烷的乙酸乙酯溶液中,30~35℃搅拌反应2~3小时,过滤,乙酸乙酯洗涤2~3次,烘干,即得预改性棉纤维。
优选的,以重量份计,步骤(B)的具体方法为:先将1份甲基丙烯酸十二氟庚酯加入5~7份乙酸乙酯,搅拌至分散均匀,接着加入0.08~0.1份1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐和0.01~0.02份2,2-二甲基-2-苯基苯乙酮,搅拌混匀,得到预混液;最后将预改性棉纤维摊薄,在其表面喷洒第一部分预混液,紫外光照射下发生第一次聚合反应,翻面后喷洒第二部分预混液,紫外光照射下发生第二次聚合反应,即得所述的疏水改性棉纤维。
进一步优选的,预改性棉纤维摊薄至厚度为1~2mm;预改性棉纤维、第一部分预混液、第二部分预混液的质量比为1:2~3:1.5~1.8。
进一步优选的,第一次聚合反应的工艺条件为:500W紫外光冷光源下,灯距10~12cm,光照30~40分钟;第二次聚合反应的工艺条件与第一次聚合反应相同。
优选的,步骤(C)中,机械打孔的具体方法为:采用针尖细、针杆粗的打孔针,打出上大下小的锥形孔。
优选的,步骤(a)中,丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜与透明质酸钠溶液的质量比为1:5~8:4~6:2~3;其中,以重量份计,丝素蛋白溶液的制备方法如下:先将1份柞蚕丝加入4~6份质量浓度0.05~0.1%碳酸钠水溶液中,边搅拌边煮沸处理30~40分钟,重复3~4次,捞出后用去离子水洗涤2~3次;再浸泡于3~5份质量浓度1~1.2%的氯化钾溶液中,在130~140℃和0.5~0.6MPa条件下处理2~3小时,过滤取滤液,即得所述的丝素蛋白溶液。
优选的,步骤(a)中,透明质酸钠溶液中所含透明质酸钠的分子量为100~120万。
优选的,步骤(a)中,所述聚酯聚醚共聚物的制备方法如下:先将对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200加入反应釜中,搅拌加热至120~130℃,接着加入质量浓度28~30%甲醇钠甲醇溶液,继续加热至175~185℃,搅拌反应4~5小时,在搅拌反应过程中馏出甲醇,再抽真空至0.1~0.2Pa,并升温至220~230℃,保温搅拌3~4小时,自然冷却至室温,即得所述的聚酯聚醚共聚物。
进一步优选的,对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200的摩尔比为1:0.15~0.2:0.2~0.3:1.2~1.3;甲醇钠甲醇溶液的用量为对苯二甲酸二甲酯重量的3~5%。
优选的,步骤(a)中,反应的工艺条件为:室温(25℃)静置反应60~70分钟。
优选的,步骤(b)中,棉纤维与浸渍液的质量比为1:5~6;浸渍处理的工艺条件为:300~500W超声波振荡处理20~30分钟;后处理的具体方法为:沥干后转移至无水乙醇使其完全浸没,室温静置2~3小时,取出后自然风干即可。
另外,本发明还要求保护利用上述加工工艺得到的一种透气、干爽的双层无纺布。
与现有技术相比,本发明的有益效果如下:
(1)本发明将表层与底层经热风复合得到一种透气、干爽的双层无纺布,其中,表层是将棉纤维进行疏水改性后,经开松、梳理、成网、机械打孔而得,故表层具有良好的疏水性,机械打孔后起到导流作用,使得水分迅速下渗而不返渗,使得产品表面透气、干爽;底层是棉纤维进行亲水改性后,经开松、梳理、成网而得,故底层具有良好的亲水性,可以迅速吸收下渗的水分,使得产品表面透气并保持干爽。
(2)本发明表层的制备方法如下:先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,接着利用甲基丙烯酸十二氟庚酯和1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐进行表面接枝聚合反应,得到疏水改性棉纤维,最后将疏水改性棉纤维经开松、梳理、成网、机械打孔即得表层。巯基改性处理对棉纤维进行了高活性巯基修饰,接着巯基与甲基丙烯酸十二氟庚酯中的乙烯基反应,实现了棉纤维的表面接枝修饰,引入了疏水性基团,同时,1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐中的氨基可与氟形成氢键作用,增强物理隔离作用,进一步改善疏水性。
本发明底层的制备方法如下:先将丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜加入透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;然后将棉纤维加入浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;最后将亲水改性棉纤维经开松、梳理、成网,即得底层。本发明制备的浸渍液中,包含透明质酸钠交联产物以及与丝素蛋白的交联产物,将棉纤维加入浸渍液中,在浸渍处理过程中,可在棉纤维表面形成凝胶层,改善亲水性,并具有较好的吸水导水性,加快下渗,使得产品表面透气并保持干爽。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
一种透气、干爽的双层无纺布的加工工艺,是将表层与底层经热风复合而成,其中,表层是通过以下方法制备得到的:
(A)先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,得到预改性棉纤维;
(B)接着将预改性棉纤维利用甲基丙烯酸十二氟庚酯和1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐进行表面接枝聚合反应,得到疏水改性棉纤维;
(C)最后将疏水改性棉纤维经开松、梳理、成网、机械打孔,得到表层;
所述底层是通过以下方法制备得到的:
(a)先将丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜加入质量浓度1~2%透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;
(b)然后将棉纤维加入浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;
(c)最后将亲水改性棉纤维经开松、梳理、成网,得到底层。
其中,所述热风复合的工艺条件为:热风温度为170℃,风机频率为30Hz,线速度为100m/min。
步骤(A)的具体方法为:先将1kg棉纤维加入5kg质量浓度5%3-巯丙基三乙氧基硅烷的乙酸乙酯溶液中,30℃搅拌反应3小时,过滤,乙酸乙酯洗涤2次,烘干,即得预改性棉纤维。
步骤(B)的具体方法为:先将1kg甲基丙烯酸十二氟庚酯加入7kg乙酸乙酯,搅拌至分散均匀,接着加入0.08kg1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐和0.02kg2,2-二甲基-2-苯基苯乙酮,搅拌混匀,得到预混液;最后将预改性棉纤维摊薄,在其表面喷洒第一部分预混液,紫外光照射下发生第一次聚合反应,翻面后喷洒第二部分预混液,紫外光照射下发生第二次聚合反应,即得所述的疏水改性棉纤维。
所述预改性棉纤维摊薄至厚度为1mm;预改性棉纤维、第一部分预混液、第二部分预混液的质量比为1:3:1.5。
所述第一次聚合反应的工艺条件为:500W紫外光冷光源下,灯距12cm,光照30分钟;第二次聚合反应的工艺条件与第一次聚合反应相同。
步骤(C)中,机械打孔的具体方法为:采用针尖细、针杆粗的打孔针,打出上大下小的锥形孔。
步骤(a)中,丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜与透明质酸钠溶液的质量比为1:8:4:3;其中,丝素蛋白溶液的制备方法如下:先将1kg柞蚕丝加入4kg质量浓度0.1%碳酸钠水溶液中,边搅拌边煮沸处理30分钟,重复4次,捞出后用去离子水洗涤2次;再浸泡于5kg质量浓度1%的氯化钾溶液中,在140℃和0.5MPa条件下处理3小时,过滤取滤液,即得所述的丝素蛋白溶液。
步骤(a)中,透明质酸钠溶液中所含透明质酸钠的分子量为100万。
步骤(a)中,所述聚酯聚醚共聚物的制备方法如下:先将对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200加入反应釜中,搅拌加热至130℃,接着加入质量浓度28%甲醇钠甲醇溶液,继续加热至185℃,搅拌反应4小时,在搅拌反应过程中馏出甲醇,再抽真空至0.2Pa,并升温至220℃,保温搅拌4小时,自然冷却至室温,即得所述的聚酯聚醚共聚物。
所述对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200的摩尔比为1:0.15:0.3:1.2;甲醇钠甲醇溶液的用量为对苯二甲酸二甲酯重量的5%。
步骤(a)中,反应的工艺条件为:室温(25℃)静置反应60分钟。
步骤(b)中,棉纤维与浸渍液的质量比为1:6;浸渍处理的工艺条件为:300W超声波振荡处理30分钟;后处理的具体方法为:沥干后转移至无水乙醇使其完全浸没,室温静置2小时,取出后自然风干即可。
实施例2
一种透气、干爽的双层无纺布的加工工艺,是将表层与底层经热风复合而成,其中,表层是通过以下方法制备得到的:
(A)先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,得到预改性棉纤维;
(B)接着将预改性棉纤维利用甲基丙烯酸十二氟庚酯和1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐进行表面接枝聚合反应,得到疏水改性棉纤维;
(C)最后将疏水改性棉纤维经开松、梳理、成网、机械打孔,得到表层;
所述底层是通过以下方法制备得到的:
(a)先将丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜加入质量浓度1.5%透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;
(b)然后将棉纤维加入浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;
(c)最后将亲水改性棉纤维经开松、梳理、成网,得到底层。
其中,所述热风复合的工艺条件为:热风温度为150℃,风机频率为40Hz,线速度为80m/min。
步骤(A)的具体方法为:先将1kg棉纤维加入7kg质量浓度3%3-巯丙基三乙氧基硅烷的乙酸乙酯溶液中,35℃搅拌反应2小时,过滤,乙酸乙酯洗涤3次,烘干,即得预改性棉纤维。
步骤(B)的具体方法为:先将1kg甲基丙烯酸十二氟庚酯加入5kg乙酸乙酯,搅拌至分散均匀,接着加入0.1kg1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐和0.01kg2,2-二甲基-2-苯基苯乙酮,搅拌混匀,得到预混液;最后将预改性棉纤维摊薄,在其表面喷洒第一部分预混液,紫外光照射下发生第一次聚合反应,翻面后喷洒第二部分预混液,紫外光照射下发生第二次聚合反应,即得所述的疏水改性棉纤维。
预改性棉纤维摊薄至厚度为2mm;预改性棉纤维、第一部分预混液、第二部分预混液的质量比为1:2:1.8。
所述第一次聚合反应的工艺条件为:500W紫外光冷光源下,灯距10cm,光照40分钟;第二次聚合反应的工艺条件与第一次聚合反应相同。
步骤(C)中,机械打孔的具体方法为:采用针尖细、针杆粗的打孔针,打出上大下小的锥形孔。
步骤(a)中,丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜与透明质酸钠溶液的质量比为1:5:6:2;其中,丝素蛋白溶液的制备方法如下:先将1kg柞蚕丝加入6kg质量浓度0.05%碳酸钠水溶液中,边搅拌边煮沸处理40分钟,重复3次,捞出后用去离子水洗涤3次;再浸泡于3kg质量浓度1.2%的氯化钾溶液中,在130℃和0.6MPa条件下处理2小时,过滤取滤液,即得所述的丝素蛋白溶液。
步骤(a)中,透明质酸钠溶液中所含透明质酸钠的分子量为120万。
步骤(a)中,所述聚酯聚醚共聚物的制备方法如下:先将对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200加入反应釜中,搅拌加热至120℃,接着加入质量浓度30%甲醇钠甲醇溶液,继续加热至175℃,搅拌反应5小时,在搅拌反应过程中馏出甲醇,再抽真空至0.1Pa,并升温至230℃,保温搅拌3小时,自然冷却至室温,即得所述的聚酯聚醚共聚物。
所述对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200的摩尔比为1:0.2:0.2:1.3;甲醇钠甲醇溶液的用量为对苯二甲酸二甲酯重量的3%。
步骤(a)中,反应的工艺条件为:室温(25℃)静置反应70分钟。
步骤(b)中,棉纤维与浸渍液的质量比为1:5;浸渍处理的工艺条件为:500W超声波振荡处理20分钟;后处理的具体方法为:沥干后转移至无水乙醇使其完全浸没,室温静置3小时,取出后自然风干即可。
实施例3
一种透气、干爽的双层无纺布的加工工艺,是将表层与底层经热风复合而成,其中,表层是通过以下方法制备得到的:
(A)先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,得到预改性棉纤维;
(B)接着将预改性棉纤维利用甲基丙烯酸十二氟庚酯和1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐进行表面接枝聚合反应,得到疏水改性棉纤维;
(C)最后将疏水改性棉纤维经开松、梳理、成网、机械打孔,得到表层;
所述底层是通过以下方法制备得到的:
(a)先将丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜加入质量浓度1.5%透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;
(b)然后将棉纤维加入浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;
(c)最后将亲水改性棉纤维经开松、梳理、成网,得到底层。
所述热风复合的工艺条件为:热风温度为160℃,风机频率为35Hz,线速度为90m/min。
步骤(A)的具体方法为:先将1kg棉纤维加入6kg质量浓度4%3-巯丙基三乙氧基硅烷的乙酸乙酯溶液中,33℃搅拌反应2.5小时,过滤,乙酸乙酯洗涤3次,烘干,即得预改性棉纤维。
步骤(B)的具体方法为:先将1kg甲基丙烯酸十二氟庚酯加入6kg乙酸乙酯,搅拌至分散均匀,接着加入0.09kg1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐和0.015kg2,2-二甲基-2-苯基苯乙酮,搅拌混匀,得到预混液;最后将预改性棉纤维摊薄,在其表面喷洒第一部分预混液,紫外光照射下发生第一次聚合反应,翻面后喷洒第二部分预混液,紫外光照射下发生第二次聚合反应,即得所述的疏水改性棉纤维。
所述预改性棉纤维摊薄至厚度为1.5mm;预改性棉纤维、第一部分预混液、第二部分预混液的质量比为1:2.5:1.7。
所述第一次聚合反应的工艺条件为:500W紫外光冷光源下,灯距11cm,光照35分钟;第二次聚合反应的工艺条件与第一次聚合反应相同。
步骤(C)中,机械打孔的具体方法为:采用针尖细、针杆粗的打孔针(针的最粗处直径为0.5mm,最细处直径为0.05mm),打出上大下小的锥形孔。
步骤(a)中,丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜与透明质酸钠溶液的质量比为1:7:5:2.5;其中,丝素蛋白溶液的制备方法如下:先将1kg柞蚕丝加入5kg质量浓度0.08%碳酸钠水溶液中,边搅拌边煮沸处理35分钟,重复3次,捞出后用去离子水洗涤3次;再浸泡于4kg质量浓度1.1%的氯化钾溶液中,在135℃和0.6MPa条件下处理2.5小时,过滤取滤液,即得所述的丝素蛋白溶液。
步骤(a)中,透明质酸钠溶液中所含透明质酸钠的分子量为110万。
步骤(a)中,所述聚酯聚醚共聚物的制备方法如下:先将对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200加入反应釜中,搅拌加热至125℃,接着加入质量浓度29%甲醇钠甲醇溶液,继续加热至180℃,搅拌反应4.5小时,在搅拌反应过程中馏出甲醇,再抽真空至0.15Pa,并升温至225℃,保温搅拌3.5小时,自然冷却至室温,即得所述的聚酯聚醚共聚物。
所述对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200的摩尔比为1:0.18:0.25:1.25;甲醇钠甲醇溶液的用量为对苯二甲酸二甲酯重量的4%。
步骤(a)中,反应的工艺条件为:室温(25℃)静置反应65分钟。
步骤(b)中,棉纤维与浸渍液的质量比为1:5.5;浸渍处理的工艺条件为:400W超声波振荡处理25分钟;后处理的具体方法为:沥干后转移至无水乙醇使其完全浸没,室温静置2.5小时,取出后自然风干即可。
对比例1
一种无纺布的加工工艺,是将表层与底层经热风复合而成,其中,表层是通过以下方法制备得到的:
(A)先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,得到预改性棉纤维;
(B)接着将预改性棉纤维利用甲基丙烯酸十二氟庚酯进行表面接枝聚合反应,得到疏水改性棉纤维;
(C)最后将疏水改性棉纤维经开松、梳理、成网、机械打孔,得到表层;
所述底层是通过以下方法制备得到的:
(a)先将丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜加入质量浓度1~2%透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;
(b)然后将棉纤维加入浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;
(c)最后将亲水改性棉纤维经开松、梳理、成网,得到底层。
所述热风复合的工艺条件为:热风温度为170℃,风机频率为30Hz,线速度为100m/min。
步骤(A)的具体方法为:先将1kg棉纤维加入5kg质量浓度5%3-巯丙基三乙氧基硅烷的乙酸乙酯溶液中,30℃搅拌反应3小时,过滤,乙酸乙酯洗涤2次,烘干,即得预改性棉纤维。
步骤(B)的具体方法为:先将1kg甲基丙烯酸十二氟庚酯加入7kg乙酸乙酯,搅拌至分散均匀,接着加入0.02kg2,2-二甲基-2-苯基苯乙酮,搅拌混匀,得到预混液;最后将预改性棉纤维摊薄,在其表面喷洒第一部分预混液,紫外光照射下发生第一次聚合反应,翻面后喷洒第二部分预混液,紫外光照射下发生第二次聚合反应,即得所述的疏水改性棉纤维。
所述预改性棉纤维摊薄至厚度为1mm;预改性棉纤维、第一部分预混液、第二部分预混液的质量比为1:3:1.5。
第一次聚合反应的工艺条件为:500W紫外光冷光源下,灯距12cm,光照30分钟;第二次聚合反应的工艺条件与第一次聚合反应相同。
步骤(C)中,机械打孔的具体方法为:采用针尖细、针杆粗的打孔针,打出上大下小的锥形孔。
步骤(a)中,丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜与透明质酸钠溶液的质量比为1:8:4:3;其中,丝素蛋白溶液的制备方法如下:先将1kg柞蚕丝加入4kg质量浓度0.1%碳酸钠水溶液中,边搅拌边煮沸处理30分钟,重复4次,捞出后用去离子水洗涤2次;再浸泡于5kg质量浓度1%的氯化钾溶液中,在140℃和0.5MPa条件下处理3小时,过滤取滤液,即得所述的丝素蛋白溶液。
步骤(a)中,透明质酸钠溶液中所含透明质酸钠的分子量为100万。
步骤(a)中,所述聚酯聚醚共聚物的制备方法如下:先将对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200加入反应釜中,搅拌加热至130℃,接着加入质量浓度28%甲醇钠甲醇溶液,继续加热至185℃,搅拌反应4小时,在搅拌反应过程中馏出甲醇,再抽真空至0.2Pa,并升温至220℃,保温搅拌4小时,自然冷却至室温,即得所述的聚酯聚醚共聚物。
所述对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200的摩尔比为1:0.15:0.3:1.2;甲醇钠甲醇溶液的用量为对苯二甲酸二甲酯重量的5%。
步骤(a)中,反应的工艺条件为:室温(25℃)静置反应60分钟。
步骤(b)中,棉纤维与浸渍液的质量比为1:6;浸渍处理的工艺条件为:300W超声波振荡处理30分钟;后处理的具体方法为:沥干后转移至无水乙醇使其完全浸没,室温静置2小时,取出后自然风干即可。
对比例2
一种无纺布的加工工艺,是将表层与底层经热风复合而成,其中,表层是通过以下方法制备得到的:
(A)先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,得到预改性棉纤维;
(B)接着将预改性棉纤维利用甲基丙烯酸十二氟庚酯和1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐进行表面接枝聚合反应,得到疏水改性棉纤维;
(C)最后将疏水改性棉纤维经开松、梳理、成网、机械打孔,得到表层;
所述底层是通过以下方法制备得到的:
(a)先将聚酯聚醚共聚物、二乙烯基砜加入质量浓度1~2%透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;
(b)然后将棉纤维加入浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;
(c)最后将亲水改性棉纤维经开松、梳理、成网,得到底层。
热风复合的工艺条件为:热风温度为170℃,风机频率为30Hz,线速度为100m/min。
步骤(A)的具体方法为:先将1kg棉纤维加入5kg质量浓度5%3-巯丙基三乙氧基硅烷的乙酸乙酯溶液中,30℃搅拌反应3小时,过滤,乙酸乙酯洗涤2次,烘干,即得预改性棉纤维。
步骤(B)的具体方法为:先将1kg甲基丙烯酸十二氟庚酯加入7kg乙酸乙酯,搅拌至分散均匀,接着加入0.08kg1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐和0.02kg2,2-二甲基-2-苯基苯乙酮,搅拌混匀,得到预混液;最后将预改性棉纤维摊薄,在其表面喷洒第一部分预混液,紫外光照射下发生第一次聚合反应,翻面后喷洒第二部分预混液,紫外光照射下发生第二次聚合反应,即得所述的疏水改性棉纤维。
所述预改性棉纤维摊薄至厚度为1mm;预改性棉纤维、第一部分预混液、第二部分预混液的质量比为1:3:1.5。
所述第一次聚合反应的工艺条件为:500W紫外光冷光源下,灯距12cm,光照30分钟;第二次聚合反应的工艺条件与第一次聚合反应相同。
步骤(C)中,机械打孔的具体方法为:采用针尖细、针杆粗的打孔针,打出上大下小的锥形孔。
步骤(a)中,聚酯聚醚共聚物、二乙烯基砜与透明质酸钠溶液的质量比为8:4:3。
步骤(a)中,透明质酸钠溶液中所含透明质酸钠的分子量为100万。
步骤(a)中,所述聚酯聚醚共聚物的制备方法如下:先将对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200加入反应釜中,搅拌加热至130℃,接着加入质量浓度28%甲醇钠甲醇溶液,继续加热至185℃,搅拌反应4小时,在搅拌反应过程中馏出甲醇,再抽真空至0.2Pa,并升温至220℃,保温搅拌4小时,自然冷却至室温,即得所述的聚酯聚醚共聚物。
所述对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200的摩尔比为1:0.15:0.3:1.2;甲醇钠甲醇溶液的用量为对苯二甲酸二甲酯重量的5%。
步骤(a)中,反应的工艺条件为:室温(25℃)静置反应60分钟。
步骤(b)中,棉纤维与浸渍液的质量比为1:6;浸渍处理的工艺条件为:300W超声波振荡处理30分钟;后处理的具体方法为:沥干后转移至无水乙醇使其完全浸没,室温静置2小时,取出后自然风干即可。
对比例3
一种无纺布的加工工艺,是将表层与底层经热风复合而成,其中,表层是通过以下方法制备得到的:
(A)先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,得到预改性棉纤维;
(B)接着将预改性棉纤维利用甲基丙烯酸十二氟庚酯和1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐进行表面接枝聚合反应,得到疏水改性棉纤维;
(C)最后将疏水改性棉纤维经开松、梳理、成网、机械打孔,得到表层;
所述底层是通过以下方法制备得到的:
(a)先将丝素蛋白溶液、二乙烯基砜加入质量浓度1~2%透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;
(b)然后将棉纤维加入浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;
(c)最后将亲水改性棉纤维经开松、梳理、成网,得到底层。
无纺布的整体厚度为2mm,表层克重为15g/m2,底层克重为18g/m2。
热风复合的工艺条件为:热风温度为170℃,风机频率为30Hz,线速度为100m/min。
步骤(A)的具体方法为:先将1kg棉纤维加入5kg质量浓度5%3-巯丙基三乙氧基硅烷的乙酸乙酯溶液中,30℃搅拌反应3小时,过滤,乙酸乙酯洗涤2次,烘干,即得预改性棉纤维。
步骤(B)的具体方法为:先将1kg甲基丙烯酸十二氟庚酯加入7kg乙酸乙酯,搅拌至分散均匀,接着加入0.08kg1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐和0.02kg2,2-二甲基-2-苯基苯乙酮,搅拌混匀,得到预混液;最后将预改性棉纤维摊薄,在其表面喷洒第一部分预混液,紫外光照射下发生第一次聚合反应,翻面后喷洒第二部分预混液,紫外光照射下发生第二次聚合反应,即得所述的疏水改性棉纤维。
所述预改性棉纤维摊薄至厚度为1mm;预改性棉纤维、第一部分预混液、第二部分预混液的质量比为1:3:1.5。
所述第一次聚合反应的工艺条件为:500W紫外光冷光源下,灯距12cm,光照30分钟;第二次聚合反应的工艺条件与第一次聚合反应相同。
步骤(C)中,机械打孔的具体方法为:采用针尖细、针杆粗的打孔针,打出上大下小的锥形孔。
步骤(a)中,丝素蛋白溶液、二乙烯基砜与透明质酸钠溶液的质量比为1:4:3;其中,丝素蛋白溶液的制备方法如下:先将1kg柞蚕丝加入4kg质量浓度0.1%碳酸钠水溶液中,边搅拌边煮沸处理30分钟,重复4次,捞出后用去离子水洗涤2次;再浸泡于5kg质量浓度1%的氯化钾溶液中,在140℃和0.5MPa条件下处理3小时,过滤取滤液,即得所述的丝素蛋白溶液。
步骤(a)中,透明质酸钠溶液中所含透明质酸钠的分子量为100万。
步骤(a)中,反应的工艺条件为:室温(25℃)静置反应60分钟。
步骤(b)中,棉纤维与浸渍液的质量比为1:6;浸渍处理的工艺条件为:300W超声波振荡处理30分钟;后处理的具体方法为:沥干后转移至无水乙醇使其完全浸没,室温静置2小时,取出后自然风干即可。
对上述实施例和对比例所制备的无纺布材料进行性能评价,具体如下:
对实施例1~3和对比例1~3所得无纺布进行性能测试,包括渗透性能、防回渗性能以及透气性能,结果见表1和表2。
对实施例1~3和对比例1~3所得无纺布(尺寸均为10cm×10cm)进行性能测试,包括渗透性能、防回渗性能以及透气性能,结果见表1和表2。
其中,渗透性能的测试参考ASTM D6651-01“无纺布吸水速率测试方法”,将无纺布的表层接触水面,计时开始,无纺布干燥面完全消失,停止计时,即为渗透时间。
防回渗性能的测试方法如下:停止计时后,将无纺布平放于桌面上,表层向上,用大小、形状完全相同的滤纸(吸水前质量m0)覆盖于无纺布表面,将表面水分完全吸掉,记录吸水后滤纸质量m1,那么回渗量=m1-m0。
透气性测试参考GB/T5453-1997《纺织品织物透气性的测定》。
表1.渗水性能和防回渗性能测试结果
渗透时间(s) | 回渗量(g) | |
实施例1 | 0.45 | 0.005 |
实施例2 | 0.44 | 0.004 |
实施例3 | 0.41 | 0.002 |
对比例1 | 0.66 | 0.101 |
对比例2 | 0.91 | 0.025 |
对比例3 | 0.98 | 0.033 |
表2.透气性测试结果
透气率(m/s) | |
实施例1 | 0.391 |
实施例2 | 0.397 |
实施例3 | 0.403 |
对比例1 | 0.337 |
对比例2 | 0.224 |
对比例3 | 0.231 |
由表1和表2可知,实施例1~3所得无纺布可实现水的迅速渗入,回渗少,使其表面干爽,且透气性佳。
对比例1-对比例3所制备得到的无纺布的渗透性能均明显变差,说明表层疏水性和底层亲水性协同促进水分快速渗入;对比例1的防回渗性能变差,说明1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐与表层其他成分协同改善疏水性;对比例2、3的透气性明显变差,说明底层凝胶的形成以及聚酯聚醚共聚物对亲水性的改善有助于改善透气性。
对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方式仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。
Claims (10)
1.一种透气、干爽双层无纺布的加工工艺,其特征在于,是将表层与底层经热风复合而成,其中,所述表层是通过以下方法制备得到的:
(A)先将棉纤维利用3-巯丙基三乙氧基硅烷进行巯基改性处理,得到预改性棉纤维;
(B)将步骤(A)制备的预改性棉纤维利用甲基丙烯酸十二氟庚酯和1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐进行表面接枝聚合反应,得到疏水改性棉纤维;
(C)将步骤(B)得到的疏水改性棉纤维经开松、梳理、成网、机械打孔,得到表层;
所述底层是通过以下方法制备得到的:
(a)先将丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜加入质量浓度为1~2%的透明质酸钠溶液中,搅拌混匀,反应,得到浸渍液;
(b)然后将棉纤维加入步骤(a)的浸渍液中,浸渍处理,后处理,得到亲水改性棉纤维;
(c)将步骤(b)亲水改性的棉纤维经开松、梳理、成网,得到底层。
2.根据权利要求1所述的加工工艺,其特征在于,所述无纺布的整体厚度为2~3mm,表层克重为10~15g/m2,底层克重为18~25 g/m2。
3.根据权利要求1所述的加工工艺,其特征在于,所述热风复合的工艺条件为:热风温度为150~170℃,风机频率为30~40Hz,线速度为80~100m/min。
4.根据权利要求1所述的加工工艺,其特征在于,以重量份计,步骤(A)的具体方法为:将1份棉纤维加入到5~7份质量浓度3~5%的3-巯丙基三乙氧基硅烷的乙酸乙酯溶液中,30~35℃搅拌反应2~3小时,过滤,乙酸乙酯洗涤2~3次,烘干,即得预改性棉纤维。
5.根据权利要求1所述的加工工艺,其特征在于,以重量份计,步骤(B)的具体方法为:将1份甲基丙烯酸十二氟庚酯加入到5~7份乙酸乙酯中,搅拌至分散均匀,接着加入0.08~0.1份1-胺丙基-3-甲基咪唑双(三氟甲烷磺酰)亚胺盐和0.01~0.02份2,2-二甲基-2-苯基苯乙酮,搅拌混匀,得到预混液;然后将预改性棉纤维摊薄,在其表面喷洒第一部分预混液,紫外光照射下发生第一次聚合反应,翻面后喷洒第二部分预混液,紫外光照射下发生第二次聚合反应,即得所述的疏水改性棉纤维。
6.根据权利要求1所述的加工工艺,其特征在于,步骤(C)中,机械打孔的具体方法为:采用针尖细、针杆粗的打孔针,打出上大下小的锥形孔。
7.根据权利要求1所述的加工工艺,其特征在于,步骤(a)中,丝素蛋白溶液、聚酯聚醚共聚物、二乙烯基砜与透明质酸钠溶液的质量比为1:5~8:4~6:2~3;其中,以重量份计,丝素蛋白溶液的制备方法如下:先将1份柞蚕丝加入4~6份质量浓度0.05~0.1%的碳酸钠水溶液中,边搅拌边煮沸处理30~40分钟,重复3~4次,捞出后用去离子水洗涤2~3次;再浸泡于3~5份质量浓度1~1.2%的氯化钾溶液中,在130~140℃和0.5~0.6MPa条件下处理2~3小时,过滤取滤液,即得所述的丝素蛋白溶液。
8.根据权利要求1所述的加工工艺,其特征在于,步骤(a)中,所述聚酯聚醚共聚物的制备方法如下:将对苯二甲酸二甲酯、间苯二甲酸二甲酯-5-磺酸钠、乙二醇和聚乙二醇200加入反应釜中,搅拌加热至120~130℃,接着加入质量浓度28~30%甲醇钠甲醇溶液,继续加热至175~185℃,搅拌反应4~5小时,在搅拌反应过程中馏出甲醇,再抽真空至0.1~0.2Pa,并升温至220~230℃,保温搅拌3~4小时,自然冷却至室温,即得所述的聚酯聚醚共聚物。
9.根据权利要求1所述的加工工艺,其特征在于,步骤(b)中,棉纤维与浸渍液的质量比为1:5~6;浸渍处理的工艺条件为:300~500W超声波振荡处理20~30分钟;后处理的具体方法为:沥干后转移至无水乙醇使其完全浸没,室温静置2~3小时,取出后自然风干即可。
10.一种利用权利要求1~9中任一项所述加工工艺制备得到的透气、干爽的双层无纺布,其特征在于,所述无纺布的整体厚度为2~3mm,表层克重为10~15g/m2,底层克重为18~25 g/m2。
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