CN106801360A - 全热新风纸及其制备方法 - Google Patents
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Abstract
本发明属于造纸技术领域,具体涉及一种全热新风纸及其制备方法。全热新风纸由如下原料制成:海岛纤维、漂白硫酸盐针叶木浆、阔叶漂白化学木浆、湿强剂、胶黏剂、吸湿添加剂、助剂。本发明透湿率好,能很好的对水分进行置换;纸张气密性好,可以阻挡二氧化碳、有害气体、病毒的通过;纸张匀度好,结合力高,具有良好的抗撕裂和挺度,便于成型;纸张具有足够的耐老化能力和防霉性能,成型后的产品可以很好的使用,不会造成二次污染。
Description
技术领域
本发明属于造纸技术领域,具体涉及一种全热新风纸及其制备方法。
背景技术
自从上个世纪七十年代的能源危机后,建筑物建造得越来越密闭,以减少室内热量或冷量的损失,但所带来的后果是因新鲜空气量的不足,导致室内产生的有害气体得不到合理的稀释和释放,造成一个有较高化学污染程度及细菌、真菌繁殖水平的室内环境。一个得到普遍认同的事实是在一个有空调、缺乏通风的空间内的空气污染程度要比室外空气高好几倍。室内的空气污染浓度比室外更高,而绝大多数人85%~90%的时间又在室内度过,这使得他们很容易遭受有这些空气污染引起的疾病。近年来越来越多的在空调房生活和工作的人出现各种疾病症状,表现在眼睛刺激、鼻塞、咽喉痛、头痛、头晕、无力、疲劳、易怒、气喘、瘘管充血、皮肤干、皮疹、异味引起的不适、恶心等。而这一切的起因正是由于新风不足或通风不良以及空调系统本身的污染,1980年世界卫生组织正式将此类疾病定名为“病态建筑综合症”既SBS或称为“空调病”。
对于材质的性能,大部分研究者关注的都是它的传热传湿性能。但是,材质的传递气体(特别是各种污染气体)的性能应该是更加值得关注的。尤其是当全热交换器用于一些特殊场合(比如医院)的空调系统时,空调系统的排风中带有污染的气体,在回收排风中的热量的同时,不能使污染气体也扩散到新风中去。即便是在普通的大型中央空调系统中,当有大规模的空气传播流行病爆发时,空调系统需要切换到全新风运行模式,此时的排风中携带有各种病毒,因此也不能使这些病毒通过全热交换器的材质传递到新风中去。所以,从空调系统的健康性和安全性考虑,材质传递污染气体的性能是更应值得关注的。
新风全热交换器通过管道将室外的空气温度调节接近室内空气温度后送入室内,可连续不断的提供高性能和高效率的换气。新风全热交换器在室内带动空气循环,形成恒定湿度空间;通过设备过滤掉室外空气粉尘及其他污染物,补充室内新鲜空气。
加大新风量是实现良好空气品质的最好方法,只从空气品质的角度来说,进行全新风运行的空调系统才是最好的系统,可是由此带来的能量消耗确实是非常大的。根据武汉的气象资料计算,当室内设计值在26℃,60%时,对于公共建筑,处理1m3/h新风量,整个夏季需要投入的冷能能耗累计约9.5kw·h左右。可见加大新风量后,能量消耗就有很大增加。因此,需要在新风与排风之间加设能量回收设备。固定式全热交换器性能的高低,除了与使用地区的气候条件有关外,主要取决于所用材质的热物性能的好坏。
目前的产品中用到的材质有两种:一种是特殊的纸,另外一种是膜。
目前全热新风纸还没有明确的生产技术和相关的研发,各厂家主要采用由木浆纤维利用特殊工艺制成的纸张构成,但是各厂家的的透湿率、气密性、抗撕裂、耐老化、防霉变的能力参差不齐,目前产品换热效率低,不够节约环保。最主要是由于纤维之间的间隙控制不好,做不到只有粒径较小的水蒸气分子才能通过,其他粒径较大的有害气体或异味气体分子无法通过。
发明内容
本发明的目的是提供一种全热新风纸,具备非常好的气密性和挺度,吸湿导湿性能好,纸张匀度好,结合力高,具有足够的耐老化能力和防霉性能;本发明同时提供了全热新风纸的制备方法,科学合理、简单易行。
本发明所述的全热新风纸,由如下重量份数的原料制成:
所述的助剂由如下重量份数的原料制成:
所述的湿强剂为聚酰胺多胺环氧氯丙烷(PAE)。
所述的胶黏剂为苯丙胶乳、丁苯胶乳或pva中的一种或几种。
所述的吸湿添加剂为氯化锂、氯化钙、氯化铝或硅胶中的一种或几种。
所述的纸张挺度剂为甲基丙烯酸甲酯或甲基丙烯酸丁酯中的一种或几种。
所述的抗氧化剂为二丁基羟基甲苯、丁基羟基茴香醚或特丁基对苯二酚中的一种或几种。
所述的防霉杀菌剂为异噻唑啉酮衍生物。
本发明所述的全热新风纸的制备方法,步骤如下:
(1)先将海岛纤维通过氢氧化钠溶液进行预处理,处理浓度为3-7%,95℃加热搅拌30min,之后水洗备用;
(2)处理后的海岛纤维、漂白硫酸盐针叶木浆和阔叶漂白化学木浆混合后投入打浆机中加水稀释打浆,打浆度为23-27°SR,得到浆料;
(3)将步骤(2)所得浆料与湿强剂、纸张挺度剂、防霉杀菌剂、硫酸铝混合,搅拌混合1-2h后,将混合浆料经斜网纸机抄造、烘干,得半成品原纸;
(4)胶黏剂投入三倍于其重量的水中,稀释均匀后加入吸湿添加剂、抗氧化剂、防霉杀菌剂,搅拌使其完全混合均匀,得施胶剂,将施胶剂涂布于半成品原纸表面;
(5)将胶黏剂投入1.5倍于其重量的水中,稀释均匀后加入吸湿添加剂,搅拌使其完全混合均匀,得表面涂布液,随后将该表面涂布液涂布于步骤(4)所得的施胶后原纸表面,再经干燥、表面压光整饰、卷取后即得原纸成纸。
步骤(3)中所述的防霉杀菌剂的加入量是防霉杀菌剂总质量的60-70%。
步骤(4)中所述的防霉杀菌剂的加入量是防霉杀菌剂总质量的30-40%。
步骤(4)中所述的胶黏剂的加入量是胶黏剂总质量的90%。
步骤(4)中所述的吸湿添加剂的加入量是吸湿添加剂总质量的40-60%。
步骤(5)中所述的吸湿添加剂的加入量是吸湿添加剂总质量的40-60%。
步骤(5)中所述的胶黏剂的加入量是胶黏剂总质量的10%。
步骤(5)中所述的胶黏剂至少含有pva。
所述的胶黏剂为水性无毒胶黏剂。
本发明原纸具备非常好的气密性和挺度,以及吸湿导湿性能好,海岛纤维的添加及碱减量处理使得纤维更细形成的空隙结构更致密,使得空隙结构维持在一个水蒸气分子能通过,空气分子不能通过的区间。碱减量处理的程度是技术的关键,吸湿添加剂为氯化锂、氯化钙、氯化铝、硅胶。施胶、涂布之后使得纸张表面形成一层膜结构,该结构能够阻隔空气的进入,但是其表面的吸湿基团能够传递水分子。最终形成一种透湿阻风的纸质基材,为生产高质量的新风系统用纸奠定了基础。
本发明综合研究后确定通过采用优质漂白木浆和表面施胶剂为主要原料、使用斜网纸机进行抄造、施胶机进行处理为主要工艺的总体技术方案。
该纸张需要最合适的纸张纤维空隙:既保证好的透湿率,能很好的对水分进行置换,又不至于气密性过差,无法阻挡二氧化碳、有害气体、病毒的通过。为了取得以上特性我们对浆板进行了最佳的配比,进行充分吸水润涨后,采用磨片和疏解机进行纤维处理;其次我们通过浆内添加特殊处理的特种化纤来提高成纸的透湿性,但是由于纤维比较细,添加量比较小,有好的透湿性能,另外我们采用了一种吸湿涂料对纸张进行处理,可以使纸张取得最好的吸湿性能,提高热交换效率。
为保证纸张好的成瓦楞性能和挺度,我们在浆内添加了挺度剂。
为了提高纸张对空气的阻隔性能,我们在施胶剂处添加了胶乳,提高了纸张的紧度,另外后续用高模量的胶乳及pva进行涂布,涂布后形成了一层致密的空气隔绝层,但由于涂布液内有吸湿的基团,所以对透湿没有影响。
制浆选用的两种浆板(漂白针叶木硫酸盐浆板和漂白阔叶木硫酸盐浆板)分开打浆。
本发明产品一改传统pvc隔膜,铝板通风管道等,只单纯更换新风,没有热回收系统的弊端,产品可降解,可使室内温度更恒定,更具有低碳环保的要求。
我们对浆板进行了磨浆处理,选用漂白针叶木硫酸盐浆板和漂白阔叶木硫酸盐浆板按照一定比例进行充分吸水润涨后,采用磨片和疏解机进行纤维处理;其次我们通过浆内添加特种超细海岛纤维来提高成纸的透湿能力。
另外我们采用了一种吸湿涂料对纸张进行处理,可以使纸张取得最好的吸湿性能,提高热交换效率;我们采用了两道压榨对纸张进行加压,保证纸张的致密性。
为了提高纸张的的耐老化能力和防霉性能,我们在浆内和施胶剂处添加了抗氧化剂和防霉杀菌剂。
涂层处理和压光技术,使得纸页透气性能大大降低。
产品主要性能指标:
1)克重:53-62g/m2
2)透气度:1000-2500s/100mL
3)湿拉力:8±3N/1.5cm
4)干拉力:60±10N/1.5cm
5)吸高:150±20mm/10min
目前,造纸工艺网案主要有斜网、长网、叠网、夹网、圆网等几种,斜网生产技术较其他网案形式更能保证产品质量,其具有低克重匀度好、透气性能好、吸胶量高等优点,经过研究比较,我们最终确定采用斜网生产工艺。
工艺路线如下:
碎浆→打浆→混合加填→化浆工段来浆→稳浆箱→除渣器→流浆箱→斜网部→压榨部→烘干部→施胶机→烘箱→涂布机→烘箱→压光机→卷纸机→复卷机→包装。
实践证明,该工艺操作简单,易于控制,产品质量稳定,大量节约了人力物力,优化了产品生产流程,提高了产品质量,更加能够适应用户的生产要求,生产工艺和技术水平达到国际先进水平。
本发明与现有技术相比,具有如下有益效果:
(1)透湿率好,能很好的对水分进行置换;
(2)纸张气密性好,可以阻挡二氧化碳、有害气体、病毒的通过;
(3)纸张匀度好,结合力高,具有良好的抗撕裂和挺度,便于成型;
(4)纸张具有足够的耐老化能力和防霉性能,成型后的产品可以很好的使用,不会造成二次污染。
具体实施方式
以下结合实施例对本发明做进一步描述。
实施例1
原料组成如下:
制备方法如下:
(1)先将海岛纤维通过氢氧化钠溶液进行预处理,海岛纤维浓度为6%,95℃加热搅拌30min,之后水洗备用,海岛纤维的处理情况直接影响透湿的情况;
(2)将处理后的海岛纤维、漂白硫酸盐针叶木浆、阔叶漂白化学木浆混合后投入打浆机中加水稀释打浆,打浆度为24.5°SR,得到浆料;
(3)将步骤(2)所得到浆料与湿强剂PAE、纸张挺度剂甲基丙烯酸甲酯、防霉杀菌剂异噻唑啉酮衍生物、硫酸铝混合,搅拌混合1h后,将混合浆料经斜网纸机抄造、烘干,得半成品原纸;
(4)胶黏剂按照苯丙胶乳:丁苯胶乳=2:3的质量比混合后投入三倍于其重量的水中,稀释均匀后加入氯化锂、抗氧化剂特丁基对苯二酚、防霉杀菌剂异噻唑啉酮衍生物,高速搅拌使其完全混合均匀,得施胶剂,之后通过烘干后进入涂布机,将施胶剂涂布于半成品原纸表面;
(5)将胶黏剂按照苯丙胶乳:pva=2:5的质量比混合后投入1.5倍于其重量的水中,稀释均匀后加入吸湿添加剂,吸湿添加剂为硅胶:氯化锂=1:1(质量比),高速搅拌使其完全混合均匀,得表面涂布液,随后将该表面涂布液涂布于步骤(4)所得的施胶后原纸表面,再经干燥、表面压光整饰、卷取后即得原纸成纸。
产品主要性能指标:
1)克重:60g/m2
2)透气度:1560s/100mL
3)湿拉力:8N
4)干拉力:60N
5)吸高:152mm/10min
实施例2
原料组成如下:
制备方法如下:
(1)先将海岛纤维通过氢氧化钠溶液进行预处理,海岛纤维浓度为3%,95℃加热搅拌30min,之后水洗备用,海岛纤维的处理情况直接影响透湿的情况;
(2)将处理后的海岛纤维、漂白硫酸盐针叶木浆、阔叶漂白化学木浆混合后投入打浆机中加水稀释打浆,打浆度为23°SR,得到浆料;
(3)将步骤(2)所得到浆料与湿强剂PAE、纸张挺度剂甲基丙烯酸丁酯、防霉杀菌剂异噻唑啉酮衍生物、硫酸铝混合,搅拌混合2h后,将混合浆料经斜网纸机抄造、烘干,得半成品原纸;
(4)胶黏剂苯丙胶乳投入三倍于其重量的水中,稀释均匀后加入氯化钙、抗氧化剂丁基羟基茴香醚、防霉杀菌剂异噻唑啉酮衍生物,高速搅拌使其完全混合均匀,得施胶剂,之后通过烘干后进入涂布机,将施胶剂涂布于半成品原纸表面;
(5)将胶黏剂按照苯丙胶乳:pva=2:5的质量比混合后投入1.5倍于其重量的水中,稀释均匀后加入吸湿添加剂,吸湿添加剂为硅胶:氯化铝=1:1(质量比),高速搅拌使其完全混合均匀,得表面涂布液,随后将该表面涂布液涂布于步骤(4)所得的施胶后原纸表面,再经干燥、表面压光整饰、卷取后即得原纸成纸。
产品主要性能指标:
1)克重:62g/m2
2)透气度:1799s/100mL
3)湿拉力:11N
4)干拉力:70N
5)吸高:169mm/10min
实施例3
原料组成如下:
制备方法如下:
(1)先将海岛纤维通过氢氧化钠溶液进行预处理,海岛纤维浓度为7%,95℃加热搅拌30min,之后水洗备用,海岛纤维的处理情况直接影响透湿的情况;
(2)将处理后的海岛纤维、漂白硫酸盐针叶木浆、阔叶漂白化学木浆混合后投入打浆机中加水稀释打浆,打浆度为27°SR,得到浆料;
(3)将步骤(2)所得到浆料与湿强剂PAE、纸张挺度剂甲基丙烯酸甲酯和甲基丙烯酸丁酯的混合物、防霉杀菌剂异噻唑啉酮衍生物、硫酸铝混合,搅拌混合1.5h后,将混合浆料经斜网纸机抄造、烘干,得半成品原纸;
(4)胶黏剂按照苯丙胶乳:丁苯胶乳=2:3的质量比混合后投入三倍于其重量的水中,稀释均匀后加入氯化铝、抗氧化剂二丁基羟基甲苯、防霉杀菌剂异噻唑啉酮衍生物,高速搅拌使其完全混合均匀,得施胶剂,之后通过烘干后进入涂布机,将施胶剂涂布于半成品原纸表面;
(5)将胶黏剂按照丁苯胶乳:pva=3:5的质量比混合后投入1.5倍于其重量的水中,稀释均匀后加入吸湿添加剂,吸湿添加剂为硅胶:氯化锂=1:1(质量比),高速搅拌使其完全混合均匀,得表面涂布液,随后将该表面涂布液涂布于步骤(4)所得的施胶后原纸表面,再经干燥、表面压光整饰、卷取后即得原纸成纸。
产品主要性能指标:
1)克重:53g/m2
2)透气度:2058s/100mL
3)湿拉力:5N
4)干拉力:50N
5)吸高:140mm/10min。
Claims (10)
1.一种全热新风纸,其特征在于由如下重量份数的原料制成:
所述的助剂由如下重量份数的原料制成:
2.根据权利要求1所述的全热新风纸,其特征在于所述的湿强剂为聚酰胺多胺环氧氯丙烷。
3.根据权利要求1所述的全热新风纸,其特征在于所述的胶黏剂为苯丙胶乳、丁苯胶乳或pva中的一种或几种。
4.根据权利要求1所述的全热新风纸,其特征在于所述的吸湿添加剂为氯化锂、氯化钙、氯化铝或硅胶中的一种或几种。
5.根据权利要求1所述的全热新风纸,其特征在于所述的纸张挺度剂为甲基丙烯酸甲酯或甲基丙烯酸丁酯中的一种或几种。
6.根据权利要求1所述的全热新风纸,其特征在于所述的抗氧化剂为二丁基羟基甲苯、丁基羟基茴香醚或特丁基对苯二酚中的一种或几种。
7.根据权利要求1所述的全热新风纸,其特征在于所述的防霉杀菌剂为异噻唑啉酮衍生物。
8.一种权利要求1-7任一所述的全热新风纸的制备方法,其特征在于步骤如下:
(1)先将海岛纤维通过氢氧化钠溶液进行预处理,处理浓度为3-7%,95℃加热搅拌30min,之后水洗备用;
(2)处理后的海岛纤维、漂白硫酸盐针叶木浆和阔叶漂白化学木浆混合后投入打浆机中加水稀释打浆,打浆度为23-27°SR,得到浆料;
(3)将步骤(2)所得浆料与湿强剂、纸张挺度剂、防霉杀菌剂、硫酸铝混合,搅拌混合1-2h后,将混合浆料经斜网纸机抄造、烘干,得半成品原纸;
(4)胶黏剂投入三倍于其重量的水中,稀释均匀后加入吸湿添加剂、抗氧化剂、防霉杀菌剂,搅拌使其完全混合均匀,得施胶剂,将施胶剂涂布于半成品原纸表面;
(5)将胶黏剂投入1.5倍于其重量的水中,稀释均匀后加入吸湿添加剂,搅拌使其完全混合均匀,得表面涂布液,随后将该表面涂布液涂布于步骤(4)所得的施胶后原纸表面,再经干燥、表面压光整饰、卷取后即得原纸成纸。
9.根据权利要求8所述的全热新风纸的制备方法,其特征在于步骤(4)中所述的胶黏剂的加入量是胶黏剂总质量的90%。
10.根据权利要求8所述的全热新风纸的制备方法,其特征在于步骤(5)中所述的胶黏剂至少含有pva。
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