CN113527622A - 新型防水透视聚氨酯薄膜 - Google Patents
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Abstract
本发明公开了型防水透视聚氨酯薄膜,其施工流程有原料配比→混合加热反应→调整配比→添加链延长剂及催化剂→导入亲水剂以及疏水剂→注塑成膜,其主要成分与质量为:PBA:10‑60g、PEG:40‑90g、PTMRG:30‑80g、MDI:20g、BDO:10‑60g、TDI:15‑65g、PT‑MEG:10‑60g,EO:1‑6g、PO:1‑6g,包括以下六个步骤。该新型防水透视聚氨酯薄膜,利用环氧乙烷(EO)、环氧丙烷(PO)提供化学基团作为水蒸气分子的基石,水分子由于氢键和其他分子间作用力,在高湿度链上亲水基团传递到低湿度一侧解吸,形成“吸附-扩散-解吸”过程,使外界水在一定压力下不浸透穿越织物,而人体散发的汗液等却能以水蒸气的形式传导到外界,不会在人体表面与织物之间产生冷凝聚集,使穿着者保持干爽舒适的感觉。
Description
技术领域
本发明涉及聚氨酯薄膜技术领域,具体为新型防水透视聚氨酯薄膜。
背景技术
软质聚氨酯PU主要是具有热塑性的线性结构,它比PVC发泡材料有更好的稳定性、耐化学性、回弹性和力学性能,具有更小的压缩变形性。隔热、隔音、抗震、防毒性能良好,因此用作包装、隔音、过滤材料,氨酯弹性体性能介于塑料和橡胶之间,耐油,耐磨,耐低温,耐老化,硬度高,有弹性,主要用于制鞋工业和医疗业,聚氨酯还可以制作粘合剂、涂料、合成革等。
20世纪60年代以来,聚氨酯PU被广泛用于特殊环境用衣领域,由这些材料制成的衣物具有防水、透明可视等优点,但与此同时,人体自身的新陈代谢产生的汗液却不能及时排出体外,使人产生闷热、冷湿等不舒适感,而这主要是因为此类聚合物材料缺乏“可呼吸性”造成的。
发明内容
本发明的目的在于提供新型防水透视聚氨酯薄膜,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:
新型防水透视聚氨酯薄膜,其施工流程有原料配比→混合加热反应→调整配比→添加链延长剂及催化剂→导入亲水剂以及疏水剂→注塑成膜,其主要成分与质量为:PBA:10-60g、PEG:40-90g、PTMRG:30-80g、MDI:20g、BDO:10-60g、TDI:15-65g、PT-MEG:10-60g,EO:1-6g、PO:1-6g,包括以下六个步骤:
步骤一:所述根据防水透视聚氨酯薄膜生成要求对各种原料进行质量配比,并且预备氮气进行生成保护;
步骤二:所述将计量的PBA、PEG、PTMRG加入装有搅拌器,加热器,温度计和氮气保护的真空熔炼炉中,利用加热器熔化PBA、PEG、PTMRG原料,在105℃在真空脱水两小时后,降温至50℃,加入定量的MDI,70℃下预聚2h,待NCO%接近理论值时真空脱泡1h,加入计量的BDO用慢速混合均匀,当温度达到100℃时,生成防水透视聚氨酯液;
步骤三:所述对生成防水透视聚氨酯液进行取样检测,对样品原料中的复合物的有效质量进行检测,通过检测结果进行调整配方比例,保证聚氨酯酸有效质量浓度达到0.8wt%;
步骤四:所述根据防水透视聚氨酯薄膜添加链延长剂及催化剂,通过真空熔炼炉中加热器加热到105℃进行融合,并加入定量的TDI、PT-MEG,通过搅拌器进行慢速搅拌混合均匀,在80℃下预聚2h,从而可制备出聚氨酯液;
步骤五:所述根据防水透视聚氨酯薄膜成分比例加入定量的EO、PO在90℃下预聚2h,待NCO%接近理论值时真空脱泡1h,当温度达到100℃时倾倒出聚氨酯溶液,后放入烘箱于80℃熟化16h;
步骤六:所述将熟化好的聚氨酯液倾倒在注塑机中,聚氨酯液通过注塑机进行注塑成膜,然后静置冷却,冷却后可得到防水透视聚氨酯薄膜;
进一步,所述聚氨酯需要在氮气保护下进行融合,在高温的作用下与原料中的氢气反应生成氨,化学方程式为:N2+3H2⇌2NH3 条件为高压,高温、和催化剂。反应为可逆反应)。
进一步,所述MDI链延长剂BDO,R=1.02,是制备 MDI时常用的一种功能助剂,其特点是相对分子质量小、链节短且反应活性大,随着扩链剂用量的增加,胶粘剂的内聚强度增大、软化点增高、对材质的粘接强度增强且活性增大。
进一步,所述根据聚氨酯液成分比例加入定量的催化剂,聚氨酯反应常用的催化剂有:有机叔胺类(如三乙胺)和金属有机化合物类(如辛酸亚锡、辛酸铅、二月桂酸二丁锡等),有机叔胺类催化剂能促进异氰酸酯与水反应放出二氧化碳,金属类催化剂对异氰酸酯与醇类反应有特效,催化剂的影响催化剂加入量一般控制在1%-2‰即可。
进一步,所述环氧乙烷(EO)亲水基团,环氧丙烷(PO)为疏水基团,防水透视聚氨酯薄膜利用环氧乙烷(EO)、环氧丙烷(PO)提供化学基团作为水蒸气分子的基石,水分子由于氢键和其他分子间作用力,在高湿度链上亲水基团传递到低湿度一侧解吸,形成“吸附-扩散-解吸”过程。
进一步,所述聚氨酯液成分比例加入定量的添加剂,添加剂包括干燥剂、阻燃剂、偶联剂、抗氧剂、紫外抑制剂、着色剂、粘接促进剂、填充物、增塑剂、其它聚合物等,其中增塑剂可以改善体系中各组分的相容性;调节固化物的物理性能,如拉伸强度、低温柔韧性、延伸率、硬度等;还可以用于降低体系的黏度,使其保持良好的流动。
与现有技术相比,本发明的有益效果是:该新型防水透视聚氨酯薄膜,利用环氧乙烷(EO)、环氧丙烷(PO)提供化学基团作为水蒸气分子的基石,水分子由于氢键和其他分子间作用力,在高湿度链上亲水基团传递到低湿度一侧解吸,形成“吸附-扩散-解吸”过程,使外界水在一定压力下不浸透穿越织物,而人体散发的汗液等却能以水蒸气的形式通过“吸附-扩散-解吸”传导到外界,不会在人体表面与织物之间产生冷凝聚集,使穿着者保持干爽舒适的感觉,以聚氨酯为原料的薄膜及环氧乙烷(EO)亲水基团,环氧丙烷(PO)为疏水基团可巧妙地兼具防水防风和透湿这两个功能,同时不失自身原有的优良理化性能;利用PBA、PEG混合而成聚醚型聚氨酯材料,由于PBA的存在提高了聚氨酯薄膜的机械强度,同时根据MDI存在赋予其良好的透明性,提高了聚氨酯薄膜的透明可视性,且利用增塑剂可以改善体系中各组分的相容性,调节固化物的物理性能,如拉伸强度、低温柔韧性、延伸率、硬度等,还可以用于降低体系的黏度,使其保持良好的流动。
附图说明
图1为本发明的防水透视聚氨酯薄膜的流程示意图
图2为本发明的A组实验配方示意图
图3为本发明的B组实验配方示意图。
具体实施方式
下面将结合本发明实施例中的附图,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。
在本发明的描述中,需要说明的是,术语“上”、“下”、“内”、“外”“前端”、“后端”、“两端”、“一端”、“另一端”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性。
在本发明的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“设置有”、“连接”等,应做广义理解,例如“连接”,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本发明中的具体含义。
实施例1
请参阅图1-3,本发明提供的实施例:新型防水透湿聚氨酯薄膜,其施工流程有原料配比→混合加热反应→调整配比→添加链延长剂及催化剂→导入亲水剂以及疏水剂→注塑成膜,其主要成分与质量为:PBA:10-60g、PEG:40-90g、PTMRG:30-80g、MDI:20g、BDO:10-60g、TDI:15-65g、PT-MEG:10-60g,EO:1-6g、PO:1-6g,其特征在于:包括以下六个步骤:
步骤一:所述根据防水透湿聚氨酯薄膜生成要求对各种原料进行质量配比,并且预备氮气进行生成保护;
步骤二:所述将计量的PBA、PEG、PTMRG加入装有搅拌器,加热器,温度计和氮气保护的真空熔炼炉中,利用加热器熔化PBA、PEG、PTMRG原料,在105℃在真空脱水两小时后,降温至50℃,加入定量的MDI,70℃下预聚2h,待NCO%接近理论值时真空脱泡1h,加入计量的BDO用慢速混合均匀,当温度达到100℃时,生成防水透湿聚氨酯液;
步骤三:所述对生成防水透视聚氨酯液进行取样检测,对样品原料中的复合物的有效质量进行检测,通过检测结果进行调整配方比例,保证聚氨酯酸有效质量浓度达到0.8wt%。
步骤四:所述根据防水透视聚氨酯薄膜添加链延长剂及催化剂,通过真空熔炼炉中加热器加热到105℃进行融合,并加入定量的TDI、PT-MEG,通过搅拌器进行慢速搅拌混合均匀,在80℃下预聚2h,从而可制备出聚氨酯液;
步骤五:所述根据防水透视聚氨酯薄膜成分比例加入定量的EO、PO在90℃下预聚2h,待NCO%接近理论值时真空脱泡1h,当温度达到100℃时倾倒出聚氨酯溶液,后放入烘箱于80℃熟化16h;
步骤六:所述将熟化好的聚氨酯液倾倒在注塑机中,聚氨酯液通过注塑机进行注塑成膜,然后静置冷却,冷却后可得到防水透视聚氨酯薄膜;
进一步,所述聚氨酯需要在氮气保护下进行融合,在高温的作用下与原料中的氢气反应生成氨,化学方程式为:N2+3H2⇌2NH3 条件为高压,高温、和催化剂。反应为可逆反应)。
进一步,所述MDI链延长剂BDO,R=1.02,是制备 MDI时常用的一种功能助剂,其特点是相对分子质量小、链节短且反应活性大,随着扩链剂用量的增加,胶粘剂的内聚强度增大、软化点增高、对材质的粘接强度增强且活性增大。
进一步,所述根据聚氨酯液成分比例加入定量的催化剂,聚氨酯反应常用的催化剂有:有机叔胺类(如三乙胺)和金属有机化合物类(如辛酸亚锡、辛酸铅、二月桂酸二丁锡等),有机叔胺类催化剂能促进异氰酸酯与水反应放出二氧化碳,金属类催化剂对异氰酸酯与醇类反应有特效,催化剂的影响催化剂加入量一般控制在1%-2‰即可,IPDI中与异氰酸酯基相连的是供电子基团,异氰酸酯基中碳原子的电负性很大,与活泼氢化合物的反应活性比甲苯二异氰酸 (TDI)、二苯基甲烷二异氰酸酯 (MDI) 等相对较小,为了提高 IPDI 与羟基化合物的反应速率,一般加入催化剂合成 PU 胶粘剂常用的催化剂是有机金属化合物和三元胺,如二月桂酸二丁基锡、辛酸亚锡、三元胺和三亚乙基二胺等,但三元胺易促进异氰酸酯的三聚反应,形成网状交联结构;为促进线型结构的生成,防止交联,可选用二月桂酸二丁基锡为催化剂。
进一步,所述环氧乙烷(EO)亲水基团,环氧丙烷(PO)为疏水基团,防水透湿聚氨酯薄膜利用环氧乙烷(EO)、环氧丙烷(PO)提供化学基团作为水蒸气分子的基石,水分子由于氢键和其他分子间作用力,在高湿度链上亲水基团传递到低湿度一侧解吸,形成“吸附-扩散-解吸”过程,使外界水在一定压力下不浸透穿越织物,而人体散发的汗液等却能以水蒸气的形式通过“吸附-扩散-解吸”传导到外界,不会在人体表面与织物之间产生冷凝聚集,使穿着者保持干爽舒适的感觉,以聚氨酯为原料的薄膜及环氧乙烷(EO)亲水基团,环氧丙烷(PO)为疏水基团可巧妙地兼具防水防风和透湿这两个功能,同时不失自身原有的优良理化性能。
进一步,所述聚氨酯液成分比例加入定量的添加剂,添加剂包括干燥剂、阻燃剂、偶联剂、抗氧剂、紫外抑制剂、着色剂、粘接促进剂、填充物、增塑剂、其它聚合物等,其中增塑剂可以改善体系中各组分的相容性;调节固化物的物理性能,如拉伸强度、低温柔韧性、延伸率、硬度等;还可以用于降低体系的黏度,使其保持良好的流动。
实施例2
一、聚氨酯薄膜的生产工艺:
聚氨酯材料作为目前应用较为广泛的一类薄膜材料,其生产工艺
过程主要包括配比熔炼、添加混合剂、脱泡处理等。
1、聚氨酯薄膜的配比熔炼
1.1聚氨酯薄膜的配比熔炼
由于聚氨酯液在熔炼聚合的过程中由于聚合反应产生水以及二氧化碳,使聚氨酯液纯度降低,流动性变差,注塑后会使聚氨酯薄膜产生多种注塑缺陷,影响其力学和加工工艺性能,以及抗腐蚀性能、气密性能及外观质量等,故必须在注塑前对其进行真空脱水以及脱泡处理,以达到脱水和去除气泡的目的,从而使合金液的纯净度得到提高,目前,防水透湿聚氨酯膜通常分为微孔透湿型、无孔亲水导湿型、微孔透湿与亲水导湿结合型、智能透湿型及多功能导湿透湿等五大类。
1.2聚氨酯薄膜的添加混合剂
由于,聚氨酯薄膜在注塑时会显著降低强度和塑性,所以一般都要进行添加混合剂,其中增塑剂可以改善体系中各组分的相容性;调节固化物的物理性能,如拉伸强度、低温柔韧性、延伸率、硬度等;还可以用于降低体系的黏度,使其保持良好的流动,以达到提高了机械强度的目的。
2、聚氨酯薄膜的熟化处理
2.1、熟化处理工艺分类及原理,熟化处理工艺是指控制加热温度、保温时间和冷却速度,改变聚氨酯薄膜的组织,其主要目的是:提高力学性能,增强耐腐蚀性能,改善加工性能,获得化学性质的稳定性。
2.2、熟化处理工艺可以分为如下四类。
1,降温处理;2,固熔处理;3,保温处理;4,表面处理。
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。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。
Claims (6)
1.一种新型防水透视聚氨酯薄膜,其施工流程有原料配比→混合加热反应→调整配比→添加链延长剂及催化剂→导入亲水剂以及疏水剂→注塑成膜,其主要成分与质量为:PBA:10-60g、PEG:40-90g、PTMRG:30-80g、MDI:20g、BDO:10-60g、TDI:15-65g、PT-MEG:10-60g,EO:1-6g、PO:1-6g,其特征在于:包括以下六个步骤:
步骤一:所述根据防水透视聚氨酯薄膜生成要求对各种原料进行质量配比,并且预备氮气进行生成保护;
步骤二:所述将计量的PBA、PEG、PTMRG加入装有搅拌器,加热器,温度计和氮气保护的真空熔炼炉中,利用加热器熔化PBA、PEG、PTMRG原料,在105℃在真空脱水两小时后,降温至50℃,加入定量的MDI,70℃下预聚2h,待NCO%接近理论值时真空脱泡1h,加入计量的BDO用慢速混合均匀,当温度达到100℃时,生成防水透视聚氨酯液;
步骤三:所述对生成防水透视聚氨酯液进行取样检测,对样品原料中的复合物的有效质量进行检测,通过检测结果进行调整配方比例,保证聚氨酯酸有效质量浓度达到0.8wt%;
步骤四:所述根据防水透视聚氨酯薄膜添加链延长剂及催化剂,通过真空熔炼炉中加热器加热到105℃进行融合,并加入定量的TDI、PT-MEG,通过搅拌器进行慢速搅拌混合均匀,在80℃下预聚2h,从而可制备出聚氨酯液;
步骤五:所述根据防水透视聚氨酯薄膜成分比例加入定量的EO、PO在90℃下预聚2h,待NCO%接近理论值时真空脱泡1h,当温度达到100℃时倾倒出聚氨酯溶液,后放入烘箱于80℃熟化16h;
步骤六:所述将熟化好的聚氨酯液倾倒在注塑机中,聚氨酯液通过注塑机进行注塑成膜,然后静置冷却,冷却后可得到防水透视聚氨酯薄膜。
2.根据权利要求1所述的新型防水透视聚氨酯薄膜,其特征在于:所述聚氨酯需要在氮气保护下进行融合,在高温的作用下与原料中的氢气反应生成氨,化学方程式为:N2+3H2⇌2NH3 条件为高压,高温、和催化剂。反应为可逆反应)。
3.根据权利要求1所述的新型防水透视聚氨酯薄膜,其特征在于:所述MDI链延长剂BDO,R=1.02,是制备 MDI时常用的一种功能助剂,其特点是相对分子质量小、链节短且反应活性大,随着扩链剂用量的增加,胶粘剂的内聚强度增大、软化点增高、对材质的粘接强度增强且活性增大。
4.根据权利要求1所述的新型防水透视聚氨酯薄膜,其特征在于:所述根据聚氨酯液成分比例加入定量的催化剂,聚氨酯反应常用的催化剂有:有机叔胺类(如三乙胺)和金属有机化合物类(如辛酸亚锡、辛酸铅、二月桂酸二丁锡等),有机叔胺类催化剂能促进异氰酸酯与水反应放出二氧化碳,金属类催化剂对异氰酸酯与醇类反应有特效,催化剂的影响催化剂加入量一般控制在1%-2‰即可。
5.根据权利要求1所述的新型防水透视聚氨酯薄膜,其特征在于:所述环氧乙烷(EO)亲水基团,环氧丙烷(PO)为疏水基团,防水透视聚氨酯薄膜利用环氧乙烷(EO)、环氧丙烷(PO)提供化学基团作为水蒸气分子的基石,水分子由于氢键和其他分子间作用力,在高湿度链上亲水基团传递到低湿度一侧解吸,形成“吸附-扩散-解吸”过程。
6.根据权利要求1所述的新型防水透视聚氨酯薄膜,其特征在于:所述聚氨酯液成分比例加入定量的添加剂,添加剂包括干燥剂、阻燃剂、偶联剂、抗氧剂、紫外抑制剂、着色剂、粘接促进剂、填充物、增塑剂、其它聚合物等,其中增塑剂可以改善体系中各组分的相容性;调节固化物的物理性能,如拉伸强度、低温柔韧性、延伸率、硬度等;还可以用于降低体系的黏度,使其保持良好的流动。
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CN117862403A (zh) * | 2024-03-11 | 2024-04-12 | 溧阳市金昆锻压有限公司 | 一种齿轮锻件锻压送料设备 |
CN117862403B (zh) * | 2024-03-11 | 2024-06-04 | 溧阳市金昆锻压有限公司 | 一种齿轮锻件锻压送料设备 |
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