CN111139679A - 一种聚乙烯醇纤维纸的制备方法 - Google Patents
一种聚乙烯醇纤维纸的制备方法 Download PDFInfo
- Publication number
- CN111139679A CN111139679A CN201911109427.4A CN201911109427A CN111139679A CN 111139679 A CN111139679 A CN 111139679A CN 201911109427 A CN201911109427 A CN 201911109427A CN 111139679 A CN111139679 A CN 111139679A
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- Prior art keywords
- polyvinyl alcohol
- pva
- alcohol fiber
- fiber paper
- parts
- Prior art date
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Classifications
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- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
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- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/188—Monocarboxylic acids; Anhydrides, halides or salts thereof
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
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- D—TEXTILES; PAPER
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- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/402—Amides imides, sulfamic acids
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Abstract
本发明公开了一种聚乙烯醇纤维纸的制备方法。该方法包括:将湿法纺丝生产的聚乙烯醇纤维经开松后与改性液一起进入磨浆机进行机械磨解制备聚乙烯醇纤维改性浆料;磨好的浆料输送进储浆池备用;经流送、成形、压榨、烘干、整饰、收卷即为一种聚乙烯醇纤维纸。上述改性液按重量份数计,包括如下组分:水100;聚乙烯醇PVA 8‑25;增塑剂10‑20;聚醚5‑10;湿润剂5‑20;无机填充料3‑15;爽滑剂0.3‑1.0;消泡剂1.0‑2.0;防霉剂0.3‑1.0。本发明制备的聚乙烯醇纤维纸不但具有优异的机械力学性能和热塑性能,而且能在80‑85摄氏度水温下完全溶解。
Description
技术领域
本发明属于合成纸制备领域,具体涉及一种聚乙烯醇纤维纸的制备方法。
背景技术
聚乙烯醇(PVA)作为一种环境友好型材料,近年来在许多领域得到了快速发展和应用。聚乙烯醇(PVA)材料有着丰富的原料来源和较为成熟的生产工艺,尤其在纤维的生产和应用领域,以聚乙烯醇为主要原料而生产的维尼纶纤维,成熟的生产工艺都是采取湿法纺丝即水溶液纺丝法进行,而聚乙烯醇无纺布的制备则是在生产维尼纶前段工序中,聚乙烯醇(PVA)经湿纺凝固浴成型后的聚乙烯醇纤维,不继续经缩醛处理而直接用于生产聚乙烯醇无纺布,也是近年得到了快速发展和应用的领域。由于聚乙烯醇无纺布具有水溶性和环境友好的属性,在许多领域开始取代以塑料合成树脂为原料制造的无纺布,如制鞋、制革、床垫、子母被、装饰、化工、印刷、汽车、建材,家具等行业,及服装衬布,医疗卫生一次性手术衣,口罩,帽,床单,酒店一次性台布,美容,桑拿乃至当今时尚的礼品袋,精品袋,购物袋,广告袋等等。特别是一次性使用的应用领域,可以完全取代传统的塑料合成树脂无纺布,而使产品更具有环保性。
由聚乙烯醇纤维的制备技术和工艺可知,聚乙烯醇溶液经湿法纺丝,所得初生纤维在碱性凝固浴中凝固,经中和、水洗和多段高倍拉伸和热处理后成纤,得到具有优异机械性能的聚乙烯醇纤维,不但强度高,模量高,而且纤维的分散性也非常好。采用此纤维可生产出各种规格的聚乙烯醇无纺布。
众所周知,由于聚乙烯醇熔点高达220-230℃,而在受热条件下,聚乙烯醇于180℃就开始出现不稳定和分解,随着温度的继续上升不但分解加剧,而且伴随着交联产生;所以,纯的聚乙烯醇在一般情况下是不具有热塑性加工成型属性的,所以,目前条件下,纯的聚乙烯醇材料不可能像一般热塑性塑料聚丙烯(PP)、聚乙烯(PE)、聚酯(PET)、尼龙(PA)等一样通过其具有的热塑性实现熔融纺丝(Melt spinning):即熔融挤出纺丝(Meltextruded fabric)、熔喷纺丝(Melt blown spinning)、和熔融纺粘(Melt spunbond)等方法来制备聚乙烯醇纤维和无纺布织物;就是经过湿法(溶液纺丝)纺丝的聚乙烯醇纤维也不具备热塑性,所以由湿法纺丝的聚乙烯醇纤维生产的聚乙烯醇无纺布也完全不具备热塑热封性能;这是聚乙烯醇纤维和无纺布最大的缺陷之一,即不能像其他常用的热塑性塑料合成树脂所制备的无纺布那样具有优良的热封性能,使其在应用领域受到一定的限制,如无纺布的后期制品加工:封边、封口、制袋等等,只能进行传统的人工缝合而不是由自动化热封制袋加工机械的工艺实现。这样就导致了加工效率低下、成本剧增。
为了解决上述聚乙烯醇无纺布不具备热塑性的缺陷,近年来也有通过对聚乙烯醇无纺布成型后的后加工改性处理而获得热塑性,使之能适用于通过热封、超声波焊接等方法封边、封口、制袋等等性能,如专利CN108221386A、 CN109295726A、CN109371681A等是通过对聚乙烯醇无纺布的第二次加工改性,即后期浸轧整理而获得热塑性;专利CN108729246A同样也是通过对成型后的聚乙烯醇无纺布进行第二次加工,即通过涂覆复合的方式获得聚乙烯醇无纺布的热封性能。但以上的方法均是需要二次加工的,无法直接获得改性聚乙烯醇纤维复合材料。
发明内容
为了克服现有技术存在的上述不足,本发明提供一种聚乙烯醇纤维纸的制备方法。本发明使用聚乙烯醇纤维通过造纸生产工艺来制备一种“类无纺布”的聚乙烯醇纤维纸(合成纸)。本发明使用的聚乙烯醇纤维是指由湿法纺丝(溶液纺丝)法生产的纤维。下同。此材料在本发明技术处理前是不具备热塑性和热封性能的。
本发明则是通过可行的技术方案,在聚乙烯醇无纺布的生产过程中进行改性而一次性获得上述同样的热塑性能,使生产出来的无纺布就具备这些技术要求和性能,而不需要对聚乙烯醇无纺布再进行第二次加工改性。
本发明提供一种聚乙烯醇纤维纸的制备方法,是通过使用聚乙烯醇为主要原料,对聚乙烯醇纤维进行改性处理,使改性后的聚乙烯醇纤维不但机械物理性能得到提高,更具备优异热塑性能,从而实现聚乙烯醇纤维纸(合成纸)的可热封性,使其能像传统的塑料合成树脂无纺布那样,在自动化热封加工机械的工艺上实现封边、封口、制袋等二次加工制品;从而大幅提高其加工效率,降低成本。
本发明的目的至少通过如下技术方案之一实现。
本发明提供的一种聚乙烯醇纤维纸的制备方法,包括如下步骤:
(1)将聚乙烯醇、增塑剂、聚醚、无机填充料、湿润剂、爽滑剂、消泡剂、防霉剂及水混合(在带有搅拌和加热装置的溶解容器中混合),在搅拌状态下升温进行加热处理,确保聚乙烯醇完全溶解,然后保温处理,冷却至室温,出料备用,得到聚乙烯醇纤维的改性液;
(2)将湿法纺丝生产的聚乙烯醇纤维经开松后与步骤(1)所述聚乙烯醇纤维的改性液混合,然后加入磨浆机进行机械磨解制备得到聚乙烯醇纤维浆料;将所述聚乙烯醇纤维浆料输送进储浆池备用;而后经流送上网、成形、压榨、烘干、整饰及收卷,得到所述聚乙烯醇纤维纸。
进一步地,步骤(1)中,按照重量份数计,
进一步地,步骤(1)所述聚乙烯醇的醇解度为85%-99%;所述聚乙烯醇的聚合度为300-2400;所述聚乙烯醇的树脂型号为PVA-0385、PVA-0585、 PVA-1085、PVA-1385、PVA-1585、PVA-1785、PVA-2085、PVA-2285、PVA-2485、 PVA-0395、PVA-0595、PVA-1095、PVA-1395、PVA-1595、PVA-1795、PVA-2095、 PVA-2295、PVA-2495、PVA-0388、PVA-0588、PVA-1088、PVA-1388、PVA-1588、 PVA-1788、PVA-2088、PVA-2288、PVA-2488、PVA-0399、PVA-0599、PVA-1099、 PVA-1399、PVA-1599、PVA-1799、PVA-2099、PVA-2299及PVA-2499等中的一种或一种以上。
进一步地,步骤(1)所述增塑剂为水溶性的多元醇或水溶性酰胺类中的一种或一种以上;所述水溶性的多元醇为分子中含有二个或二个以上羟基的醇类,所述水溶性的多元醇的通式为CnH2n+2-x(OH)x,x≥3;所述水溶性的多元醇包括丙三醇、乙二醇、季戊四醇、三羟甲基乙烷、木糖醇及山梨醇等中的一种;所述水溶性酰胺类包括甲酰胺、乙酰胺、丙酰胺、二甲基甲酰胺、己内酰胺、碳酰胺及硫酰胺等中的一种;所述聚醚为水溶性聚醚多元醇;所述水溶性聚醚多元醇为乙二胺/氧化丙烯聚醚或氧化乙烯/氧化丙烯共聚醚;所述乙二胺/氧化丙烯聚醚的分子量为800-2500;所述乙二胺/氧化丙烯聚醚为广州丽特新材科技有限公司生产的EPOB-800、EPOB-1000、EPOB-1200、EPOB-1500、 EPOB-2000及EPOB-2500等中的一种;所述氧化乙烯/氧化丙烯共聚醚的分子量为600-2000;所述氧化乙烯/氧化丙烯共聚醚为广州市万容新材料科技有限公司生产的PEPP-6040、PEPP-8020、PEPB-2080、PEPB-4555、PPPB-3070及 PPPB-1585等中的一种;所述氧化乙烯/氧化丙烯共聚醚由氧化乙烯(含量≥ 75%,wt%)与氧化丙烯(含量≤25%,wt%)共聚形成。
进一步地,步骤(1)所述湿润剂为烷基糖苷表面活性剂;所述湿润剂为由可再生资源天然脂肪醇和葡萄糖合成的烷基糖苷类物质(APG);所述湿润剂为AGP0810、AGP1214、AGP0814、AGP0816、AGP1216等中的一种;所述APG是一种被国际公认和首选的“绿色环保原料”,不但具有较高的表面活性,更具有良好的生态安全和相容性。原料具有温和性、无毒、无刺激,易生物降解。所述湿润剂为通过降低固体物料的表面能,能使固体物料更易被水浸湿的物质的表面活性剂。同时,烷基糖苷表面活性剂也是聚乙烯醇的有效增塑剂。
进一步地,所述无机填充料为具有稳定惰性的无机粉体,所述无机填充料的目数≥3000目;所述无机填充料为粘土、高岭土、硅藻土、硅钙粉、滑石粉、氧化铝、氧化锌、白炭黑、硫酸钡、轻质碳酸钙及重质碳酸钙等中的一种;
进一步地,所述爽滑剂为硬脂酸、硬脂酸钠、硬脂酸锌、硬脂酸钙、硬脂酰胺、油酰胺及芥酸酰胺等中的一种;所述消泡剂为抑泡消泡剂;所述消泡剂为广州市万容新材料科技有限公司生产的SRXP0511、SRXP0811、SRXP1051 及SRXP1081等中的一种;所述防霉剂为丙酸钙、山梨酸钠、山梨酸钾、苯甲酸钠及富马酸二甲酯等中的一种。
进一步地,步骤(1)所述在搅拌状态下的搅拌速率为60-120转/分;所述加热处理的温度为95-100摄氏度,加热处理的时间为2-4小时;所述保温处理的温度为90摄氏度,保温处理的时间为0.5-1.0小时。
进一步地,步骤(2)所述聚乙烯醇纤维为直径为1-3旦,长0.5-8mm湿法纺丝生产的混合短纤维。
进一步地,在步骤(2)所述制备的聚乙烯醇纤维浆料浓度为3-5%(以聚乙烯醇纤维干重计);并在聚乙烯醇纤维浆料中添加(1)制备的改性液,改性液添加量按干重计,为聚乙烯醇纤维50%-150%。
进一步地,在步骤(2)所述流送上网过程中,聚乙烯醇纤维浆料的浓度为0.6-1wt%(以聚乙烯醇纤维干重计,下同)。
进一步地,聚乙烯醇纤维原料经开松后与步骤(1)制备的改性液一起进入磨浆机进行机械磨解制备聚乙烯醇纤维浆料;磨好的浆料输送进储浆池备用;而后经流送上网、成形、压榨、烘干、整饰、收卷即为一种聚乙烯醇纤维纸。
本发明提供一种由上述的制备方法制得的聚乙烯醇纤维纸,其GSM为 10-120g/m2。
本发明使用步骤(1)所述聚乙烯醇改性液对聚乙烯醇纤维进行改性后制备一种“类无纺布”的聚乙烯醇纤维纸,该工艺流程如图1所示。
本发明制备的聚乙烯醇纤维纸的应用领域:可涵盖和替代传统的无纺布及纺织布料所制备的工业、民用制品领域,包括制鞋、制革、床垫、子母被、装饰、化工、印刷、汽车、建材及家具等行业等;如无纺布和纺织布料用于制造的服装衬布、医疗卫生一次性手术衣、口罩、帽、床单、酒店一次性台布、美容桑拿乃至当今时尚的礼品袋、精品袋、购物袋及广告袋等,特别是一次性使用的制品领域,快消品包装领域、外卖包装等,聚乙烯醇纤维纸可以完全涵盖和替代这些传统的塑料合成树脂无纺布和纺织布应用领域,而使产品更具有环保性。
与现有技术相比,本发明具有如下优点和有益效果:
(1)本发明提供的聚乙烯醇纤维纸,具备优异的热封性能,本发明提供的改性液使聚乙烯醇纤维经复合改性后具备了二次加工的热封性能,利于实现自动化机械的封边、封口和连续制袋等工艺,从而大幅提高制品加工的效率和降低成本;
(2)本发明提供的聚乙烯醇纤维纸,其纤维结点更牢固,从而使其机械性能得到进一步提高;
(3)本发明提供的聚乙烯醇纤维纸的制备方法,加入了改性液使得的聚乙烯醇纤维纸的断裂伸长率得到提高,从而使聚乙烯醇纤维纸更柔软更舒适和手感更好。
(4)与传统工艺生产的聚乙烯醇无纺布对比,本发明制备的聚乙烯醇“类无纺布”纤维纸(聚乙烯醇纤维纸),具有更均匀、更平整的特征,更适合自动化的机械高速制备各类制品。
(5)经本发明改性液机械磨浆改性后的聚乙烯醇纤维,其水溶性温度得到降低,由原来需要95℃高温水溶的纤维,能实现80-85℃在水中溶解。
附图说明
图1为实施例中一种聚乙烯醇纤维纸的加工工艺流程图。
具体实施方式
以下结合实例对本发明的具体实施作进一步说明,但本发明的实施和保护不限于此。需指出的是,以下若有未特别详细说明之过程,均是本领域技术人员可参照现有技术实现或理解的。所用试剂或仪器未注明生产厂商者,视为可以通过市售购买得到的常规产品。
以下实施例及对比例所用到的重量(质量)份数,作为举例,重量单位可以为克、千克等,也可以是本领域常用的任意其他用量。
以下实施例中,所使用的聚醚为乙二胺/氧化丙烯聚醚或氧化乙烯/氧化丙烯共聚醚;所述乙二胺/氧化丙烯聚醚为广州丽特新材科技有限公司生产的 EPOB-800、EPOB-1000、EPOB-1200、EPOB-1500、EPOB-2000及EPOB-2500 中的一种;所述氧化乙烯/氧化丙烯共聚醚为广州市万容新材料科技有限公司生产的PEPP-6040、PEPP-8020、PEPB-2080、PEPB-4555、PPPB-3070、PPPB-1585 中的一种。
所使用的湿润剂为上海发凯化工有限公司生产的包括AGP0810、AGP1214、AGP0814、AGP0816、AGP1216中的一种。
所使用的消泡剂为广州市万容新材料科技有限公司生产的SRXP0511、 SRXP0811、SRXP1051、SRXP1081中的一种。
所使用的无机填充料的目数≥3000目。
实施例1
一种聚乙烯醇纤维纸的制备方法,包括如下步骤:
(1)聚乙烯醇纤维用改性液的制备,所述聚乙烯醇纤维用改性液按重量份数计,包括如下组分:
上述各组份分别计量后,分别加入到带有搅拌和加热装置的溶解容器中,启动搅拌,搅拌速率为60转/分,并开始加热升温,升温至95℃的温度区间,在此温度区间下保持2小时,保证聚乙烯醇完全溶解,降温至90℃保温0.5 小时,而后冷却至室温下出料备用,得到聚乙烯醇纤维改性液;
(2)本发明使用步骤(1)所制备的聚乙烯醇纤维改性液对聚乙烯醇纤维进行改性后制备一种“类无纺布”的聚乙烯醇纤维纸,该工艺流程如图1所示。
在步骤(2)中所述的聚乙烯醇纤维直径为1旦,长0.5-8mm湿法纺丝生产的混合短纤维;所述制备的聚乙烯醇纤维磨浆浆料浓度为3wt%;所述制备的聚乙烯醇纤维浆料中,添加步骤(1)制备的改性液(实际固含量计)为聚乙烯醇纤维干重的50%;在流送上网过程中,聚乙烯醇纤维浆料的浓度为 0.6wt%;制备得到的聚乙烯醇纤维纸GSM为10g/m2。
聚乙烯醇纤维原料经开松后与步骤(1)制备的改性液一起进入磨浆机进行机械磨解制备聚乙烯醇纤维浆料;磨好的浆料输送进储浆池备用;而后经流送上网、成形、压榨、烘干、整饰、收卷即为一种聚乙烯醇纤维纸。
上述实施例1制备的聚乙烯醇纤维纸技术指标如表1所示。
表1
注:空白样为同等GSM的聚乙烯醇无纺布,下同。
由以上数据可知,实施例1制备的聚乙烯醇纤维纸,不但机械力学性能优于空白样,而且具有更低的水溶温度。相同时间条件下,实施例1在80℃水温下可以完全溶解;空白样则需95℃水温才可以实现完全溶解。
实施例2
一种聚乙烯醇纤维纸的制备方法,包括如下步骤:
(1)聚乙烯醇纤维用改性液的制备,所述聚乙烯醇纤维用改性液按重量份数计,包括如下组分:
上述各组份分别计量后,分别加入到带有搅拌和加热装置的溶解容器中,启动搅拌,搅拌速率为120转/分,并开始加热升温,升温至100℃的温度区间,在此温度区间下保持4小时,保证聚乙烯醇完全溶解,降温至90℃保温1.0 小时,而后冷却至室温下出料备用,得到聚乙烯醇纤维改性液;
(2)本发明使用步骤(1)所制备的聚乙烯醇纤维改性液对聚乙烯醇纤维进行改性后制备一种“类无纺布”的聚乙烯醇纤维纸,该工艺流程如图1所示。
在步骤(2)中所述的聚乙烯醇纤维直径为3旦,长0.5-8mm湿法纺丝生产的混合短纤维;所述制备的聚乙烯醇纤维磨浆浆料浓度为5wt%;所述制备的聚乙烯醇纤维浆料中,添加步骤(1)制备的改性液(实际固含量计)为聚乙烯醇纤维干重的150%;在流送上网过程中,聚乙烯醇纤维浆料的浓度为1.0wt%;制备得到的一种聚乙烯醇纤维纸GSM为120g/m2。
聚乙烯醇纤维原料经开松后与步骤(1)制备的改性液一起进入磨浆机进行机械磨解制备聚乙烯醇纤维浆料;磨好的浆料输送进储浆池备用;而后经流送上网、成形、压榨、烘干、整饰、收卷即为一种聚乙烯醇纤维纸。
上述实施例2制备的聚乙烯醇纤维纸技术指标如表2所示。
表2
由以上数据可知,实施例2制备的聚乙烯醇纤维纸,不但机械力学性能优于空白样,而且具有更低的水溶温度。相同时间条件下,实施例2在81℃水温下可以完全溶解;空白样则需98℃水温才可以实现完全溶解。
实施例3
一种聚乙烯醇纤维纸的制备方法,包括如下步骤:
(1)聚乙烯醇纤维用改性液的制备,所述聚乙烯醇纤维用改性液按重量份数计,包括如下组分:
上述各组份分别计量后,分别加入到带有搅拌和加热装置的溶解容器中,启动搅拌,搅拌速率为100转/分,并开始加热升温,升温至98℃的温度区间,在此温度区间下保持3小时,保证聚乙烯醇完全溶解,降温至90℃保温0.6 小时,而后冷却至室温下出料备用,得到聚乙烯醇纤维改性液;
(2)本发明使用步骤(1)所制备的聚乙烯醇纤维改性液对聚乙烯醇纤维进行改性后制备一种“类无纺布”的聚乙烯醇纤维纸,该工艺流程如图1所示。
在步骤(2)中所述的聚乙烯醇纤维直径为2旦,长0.5-8mm湿法纺丝生产的混合短纤维;所述制备的聚乙烯醇纤维磨浆浆料浓度为4wt%;所述制备的聚乙烯醇纤维浆料中,添加步骤(1)制备的改性液(实际固含量计)为聚乙烯醇纤维干重的100%;在流送上网过程中,聚乙烯醇纤维浆料的浓度为0.8 wt%;所述制备的一种聚乙烯醇纤维纸GSM为100g/m2。
聚乙烯醇纤维原料经开松后与步骤(1)制备的改性液一起进入磨浆机进行机械磨解制备聚乙烯醇纤维浆料;磨好的浆料输送进储浆池备用;而后经流送上网、成形、压榨、烘干、整饰、收卷即为一种聚乙烯醇纤维纸。
上述实施例3制备的聚乙烯醇纤维纸技术指标如表3所示。
表3
由以上数据可知,实施例3制备的聚乙烯醇纤维纸,不但机械力学性能优于空白样,而且具有更低的水溶温度。相同时间条件下,实施例3在85℃水温下可以完全溶解;空白样则需96℃水温才可以实现完全溶解。
实施例4
一种聚乙烯醇纤维纸的制备方法,包括如下步骤:
(1)聚乙烯醇纤维用改性液的制备,所述聚乙烯醇纤维用改性液按重量份数计,包括如下组分:
上述各组份分别计量后,分别加入到带有搅拌和加热装置的溶解容器中,启动搅拌,搅拌速率为80转/分,并开始加热升温,升温至96℃的温度区间,在此温度区间下保持3小时,保证聚乙烯醇完全溶解,降温至90℃保温1.0 小时,而后冷却至室温下出料备用,得到聚乙烯醇纤维改性液;
(2)本发明使用步骤(1)所制备的聚乙烯醇纤维改性液对聚乙烯醇纤维进行改性后制备一种“类无纺布”的聚乙烯醇纤维纸,该工艺流程如图1所示。
在步骤(2)中所述的聚乙烯醇纤维直径为1.5旦,长0.5-8mm湿法纺丝生产的混合短纤维;所述制备的聚乙烯醇纤维磨浆浆料浓度为3.5wt%;所述制备的聚乙烯醇纤维浆料中,添加步骤(1)制备的改性液(实际固含量计) 为聚乙烯醇纤维干重的80%;在流送上网过程中,聚乙烯醇纤维浆料的浓度为 0.7wt%;所述制备的一种聚乙烯醇纤维纸GSM为50g/m2。
聚乙烯醇纤维原料经开松后与步骤(1)制备的改性液一起进入磨浆机进行机械磨解制备聚乙烯醇纤维浆料;磨好的浆料输送进储浆池备用;而后经流送上网、成形、压榨、烘干、整饰、收卷即为一种聚乙烯醇纤维纸。
上述实施例4制备的聚乙烯醇纤维纸技术指标如表4所示。
表4
由以上数据可知,实施例4制备的聚乙烯醇纤维纸,不但机械力学性能优于空白样,而且具有更低的水溶温度。相同时间条件下,实施例4在82℃水温下可以完全溶解;空白样则需95℃水温才可以实现完全溶解。
以上实施例仅为本发明较优的实施方式,仅用于解释本发明,而非限制本发明,本领域技术人员在未脱离本发明精神实质下所作的改变、替换、修饰等均应属于本发明的保护范围。
Claims (10)
1.一种聚乙烯醇纤维纸的制备方法,其特征在于,包括如下步骤:
(1)将聚乙烯醇、增塑剂、聚醚、无机填充料、湿润剂、爽滑剂、消泡剂、防霉剂及水混合,在搅拌状态下升温进行加热处理,使聚乙烯醇完全溶解,然后保温处理,冷却至室温,出料备用,得到聚乙烯醇纤维的改性液;
(2)将湿法纺丝生产的聚乙烯醇纤维经开松后与步骤(1)所述聚乙烯醇纤维的改性液混合,然后加入磨浆机进行机械磨解制备得到聚乙烯醇纤维浆料;将所述聚乙烯醇纤维浆料输送进储浆池备用;而后经流送上网、成形、压榨、烘干、整饰及收卷,得到所述聚乙烯醇纤维纸。
2.根据权利要求1所述的聚乙烯醇纤维纸的制备方法,其特征在于,步骤(1)中,按照重量份数计,
聚乙烯醇 8-25份;
增塑剂 10-20份;
聚醚 5-10份;
无机填充料 3-15份;
湿润剂 5-20份;
爽滑剂 0.3-1.0份;
消泡剂 1.0-2.0份;
防霉剂 0.3-1.0份;
水 100份。
3.根据权利要求1所述的聚乙烯醇纤维纸的制备方法,其特征在于,步骤(1)所述聚乙烯醇的醇解度为85%-99%;所述聚乙烯醇的聚合度为300-2400;所述聚乙烯醇的树脂型号为PVA-0385、PVA-0585、PVA-1085、PVA-1385、PVA-1585、PVA-1785、PVA-2085、PVA-2285、PVA-2485、PVA-0395、PVA-0595、PVA-1095、PVA-1395、PVA-1595、PVA-1795、PVA-2095、PVA-2295、PVA-2495、PVA-0388、PVA-0588、PVA-1088、PVA-1388、PVA-1588、PVA-1788、PVA-2088、PVA-2288、PVA-2488、PVA-0399、PVA-0599、PVA-1099、PVA-1399、PVA-1599、PVA-1799、PVA-2099、PVA-2299及PVA-2499中的一种或一种以上。
4.根据权利要求1所述的聚乙烯醇纤维纸的制备方法,其特征在于,步骤(1)所述增塑剂为水溶性的多元醇或水溶性酰胺类中的一种或一种以上;所述水溶性的多元醇为分子中含有二个或二个以上羟基的醇类,所述水溶性的多元醇的通式为CnH2n+2-x(OH)x,x≥3;所述水溶性的多元醇包括丙三醇、乙二醇、季戊四醇、三羟甲基丙烷、木糖醇及山梨醇中的一种;所述水溶性酰胺类包括甲酰胺、乙酰胺、丙酰胺、二甲基甲酰胺、己内酰胺、碳酰胺及硫酰胺中的一种;所述聚醚为水溶性聚醚多元醇;所述水溶性聚醚多元醇为乙二胺/氧化丙烯聚醚或氧化乙烯/氧化丙烯共聚醚;所述乙二胺/氧化丙烯聚醚的分子量为800-2500;所述乙二胺/氧化丙烯聚醚为广州丽特新材科技有限公司生产的EPOB-800、EPOB-1000、EPOB-1200、EPOB-1500、EPOB-2000及EPOB-2500中的一种;所述氧化乙烯/氧化丙烯共聚醚的分子量为600-2000;所述氧化乙烯/氧化丙烯共聚醚为广州市万容新材料科技有限公司生产的PEPP-6040、PEPP-8020、PEPB-2080、PEPB-4555、PPPB-3070及PPPB-1585中的一种;所述氧化乙烯/氧化丙烯共聚醚由氧化乙烯与氧化丙烯共聚形成。
5.根据权利要求1所述的聚乙烯醇纤维纸的制备方法,其特征在于,步骤(1)所述湿润剂为烷基糖苷表面活性剂;所述湿润剂为由可再生资源天然脂肪醇和葡萄糖合成的烷基糖苷类物质;所述湿润剂为AGP0810、AGP1214、AGP0814、AGP0816、AGP1216中的一种;所述无机填充料为具有稳定惰性的无机粉体,所述无机填充料的目数≥3000目;所述无机填充料为粘土、高岭土、硅藻土、硅钙粉、滑石粉、氧化铝、氧化锌、白炭黑、硫酸钡、轻质碳酸钙及重质碳酸钙中的一种;所述爽滑剂为硬脂酸、硬脂酸钠、硬脂酸锌、硬脂酸钙、硬脂酰胺、油酰胺及芥酸酰胺中的一种;所述消泡剂为抑泡消泡剂;所述消泡剂为广州市万容新材料科技有限公司生产的SRXP0511、SRXP0811、SRXP1051及SRXP1081中的一种;所述防霉剂为丙酸钙、山梨酸钠、山梨酸钾、苯甲酸钠及富马酸二甲酯中的一种。
6.根据权利要求1所述的聚乙烯醇纤维纸的制备方法,其特征在于,步骤(1)所述在搅拌状态下的搅拌速率为60-120转/分;所述加热处理的温度为95-100摄氏度,加热处理的时间为2-4小时;所述保温处理的温度为90摄氏度,保温处理的时间为0.5-1.0小时。
7.根据权利要求1所述的聚乙烯醇纤维纸的制备方法,其特征在于,步骤(2)所述聚乙烯醇纤维为直径为1-3旦,长0.5-8mm湿法纺丝生产的混合短纤维。
8.根据权利要求1所述的聚乙烯醇纤维纸的制备方法,其特征在于,以聚乙烯醇纤维干重计,步骤(2)所述制备的聚乙烯醇纤维浆料浓度为3-5%;按照干重计,所述聚乙烯醇纤维的改性液的添加量为聚乙烯醇纤维浆料干重的50%-150%。
9.根据权利要求1所述的聚乙烯醇纤维纸的制备方法,其特征在于,在步骤(2)所述流送上网过程中,聚乙烯醇纤维浆料的浓度为0.6-1wt%。
10.一种由权利要求1-9任一项所述的制备方法制得的聚乙烯醇纤维纸,其特征在于,GSM为10-120g/m2。
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