CN110116528A - 一种特氟龙透气输送带及其制作方法 - Google Patents
一种特氟龙透气输送带及其制作方法 Download PDFInfo
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Abstract
本发明提供了一种特氟龙透气输送带及其制作方法,其中方法包括以下步骤:S1:将由经线和纬线编制制成的玻纤基布烘干后置入去离子水溶液中浸泡10分钟,烘干,所述去离子水溶液中加入玻纤布重量1%的偶联剂;S2:使用整理液将PTFE薄膜粘接在玻纤基布上,在115‑120℃的温度下烘干1小时;S3:将PTFE薄膜和玻纤基布在热压压力为0.7‑1MPa、热压温度为200‑220℃、热压时间为10‑15s的条件下高温热压覆膜,制得特氟龙透气输送带。本特氟龙透气输送带及其制作方法,制得的特氟龙输送带耐高温且透气率高,能够提高物料干燥效率。
Description
技术领域
本发明涉及特氟龙输送带技术领域,尤其涉及一种特氟龙透气输送带及其制作方法。
背景技术
聚四氟乙烯(PTFE)树脂是普兰凯特(Plankett)博士于1938年发明,由DuPont公司于1950年正式投入工业化生产。在PTFE分子中,氟原子取代了聚乙烯中的氢原子,由于氟原子半径(0.064nm)大于氢原子半径(0.028nm),使得碳-碳链由聚乙烯的平面的、充分伸展的曲折构象渐渐扭转到PTFE的螺旋构象,该螺旋构象正好包围在PTFE易受化学侵袭的碳链骨架外形成了一个紧密的完全“氟代”的保护层,这使PTFE的主链不受外界任何试剂的侵袭,从而具有其他材料无法比拟的耐溶剂性、化学稳定性以及低的内聚能密度。同时PTFE具有较好的热稳定性、化学惰性、极低的表面摩擦系数、低温时较好的延展性。但其耐蠕变能力较差、亲水性差、加工困难、导热性差、表面能大等,这些极大地限制了PTFE的应用。因此,深入研究PTFE的性质、改善其加工性能,开发新型PTFE复合材料,已成为目前PTFE的主要研究和发展方向,而各种复合改性技术正是目前PTFE研究和应用的重点。
特氟龙输送带又名铁氟龙输送带、铁富龙输送带、PTFE输送带和耐高温输送带,特氟龙输送带分特氟龙网格输送带和特氟龙高温布两种,二者均是以玻璃纤维布为基材涂覆特氟龙树脂,制成特氟龙(PTFE)输送带基布。
现有的特氟龙输送带的透气率较差,在进行输送带上的物料干燥时,干燥效率较差。
发明内容
有鉴于此,本发明要解决的技术问题是提供一种特氟龙透气输送带及其制作方法,制得的特氟龙输送带耐高温且透气率高,能够提高物料干燥效率。
本发明的技术方案是这样实现的:
一种特氟龙透气输送带的制作方法,包括以下步骤:
S1:将由经线和纬线编制制成的玻纤基布烘干后置入去离子水溶液中浸泡10分钟,烘干,所述去离子水溶液中加入玻纤布重量1%的偶联剂;
S2:使用整理液将PTFE薄膜粘接在玻纤基布上,在115-120℃的温度下烘干1小时;
S3:将PTFE薄膜和玻纤基布在热压压力为0.7-1MPa、热压温度为200-220℃、热压时间为10-15s的条件下高温热压覆膜,制得特氟龙透气输送带。
优选的,在所述S1中,在所述烘干前还包括:
将所述玻纤基布轧干,轧余率为80%。
优选的,所述整理液包括含固量70%的聚四氟乙烯乳液和含固量30%的硅油乳液。
优选的,所述偶联剂为硅烷偶联剂。
优选的,所述PTFE薄膜的厚度为0.5-1mm。
优选的,使用整理液将PTFE薄膜粘接在玻纤基布上包括:
将所述整理液作为粘结剂在玻纤基布和PTFE薄膜之间涂覆,涂覆厚度为0.3-0.4mm。
本发明还提出了一种特氟龙透气输送带,由上述任一项所述的特氟龙透气输送带的制作方法制成。
本发明的有益效果:
本发明提出的特氟龙透气输送带及其制作方法,通过整理液的处理和高温热压覆膜工艺,有效增大输送带的孔隙率,提高其透气性能。
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
一种特氟龙透气输送带的制作方法,包括以下步骤:
S1:将由经线和纬线编制制成的玻纤基布烘干后置入去离子水溶液中浸泡10分钟,将所述玻纤基布轧干,轧余率为80%,烘干,所述去离子水溶液中加入玻纤布重量1%的偶联剂;
S2:使用整理液将PTFE薄膜粘接在玻纤基布上,在115℃的温度下烘干1小时;
S3:将PTFE薄膜和玻纤基布在热压压力为0.7MPa、热压温度为200℃、热压时间为10s的条件下高温热压覆膜,制得特氟龙透气输送带。
所述整理液包括含固量70%的聚四氟乙烯乳液和含固量30%的硅油乳液。
实施例2
一种特氟龙透气输送带的制作方法,其特征在于,包括以下步骤:
S1:将由经线和纬线编制制成的玻纤基布烘干后置入去离子水溶液中浸泡10分钟,将所述玻纤基布轧干,轧余率为100%,烘干,所述去离子水溶液中加入玻纤布重量1%的偶联剂;
S2:使用整理液将PTFE薄膜粘接在玻纤基布上,在120℃的温度下烘干1小时;
S3:将PTFE薄膜和玻纤基布在热压压力为1MPa、热压温度为220℃、热压时间为15s的条件下高温热压覆膜,制得特氟龙透气输送带
所述整理液包括含固量70%的聚四氟乙烯乳液和含固量30%的硅油乳液。
实施例3
一种特氟龙透气输送带的制作方法,包括以下步骤:
S1:将由经线和纬线编制制成的玻纤基布烘干后置入去离子水溶液中浸泡10分钟,将所述玻纤基布轧干,轧余率为90%,烘干,所述去离子水溶液中加入玻纤布重量1%的偶联剂;
S2:使用整理液将PTFE薄膜粘接在玻纤基布上,在120℃的温度下烘干1小时;
S3:将PTFE薄膜和玻纤基布在热压压力为0.8MPa、热压温度为210℃、热压时间为12s的条件下高温热压覆膜,制得特氟龙透气输送带。
所述整理液包括含固量70%的聚四氟乙烯乳液和含固量30%的硅油乳液。
对比例1
方法与实施例3基本相同,区别在于轧余率为60%。
对比例2
方法与实施例3基本相同,区别在于轧余率为130%。
对比例3
方法与实施例3基本相同,将高温热压覆膜改为胶黏法。
对上述实施例制得的输送带在170-200℃的条件下恒温保持24H后取出,测量其覆膜牢度,结果如表1
表1:覆膜牢度表
覆膜牢度 | 实施例1 | 实施例2 | 实施例3 | 对比例1 | 对比例2 | 对比例3 |
试验前 | 37/KPa | 38/KPa | 38.6/KPa | 37.2/KPa | 36.8/KPa | 30.9/KPa |
试验后 | 35/KPa | 36.6/KPa | 37.4/KPa | 34.5/KPa | 34.3/KPa | 24.8/KPa |
可见,采用高温热压覆膜能够有效提高特氟龙输送带的耐高温性能。
在试样压力为200Pa,试样面积为20cm2的条件下测量上述实施例制得的输送带的透气率,结果如表2
表2:输送带透气率
可见,本发明实施例制得的输送带的透气率较好,其原因是在一定的压力条件下,纤维与纤维之间的空隙部分的PTFE薄膜会发生变形,导致平均孔径增大;且薄膜与基布存在空隙,保证了透气性。
最后需要说明的是:以上所述仅为本发明的较佳实施例,仅用于说明本发明的技术方案,并非用于限定本发明的保护范围。凡在本发明的精神和原则之内所做的任何修改、等同替换、改进等,均包含在本发明的保护范围内。
Claims (7)
1.一种特氟龙透气输送带的制作方法,其特征在于,包括以下步骤:
S1:将由经线和纬线编制制成的玻纤基布烘干后置入去离子水溶液中浸泡10分钟,烘干,所述去离子水溶液中加入玻纤布重量1%的偶联剂;
S2:使用整理液将PTFE薄膜粘接在玻纤基布上,在115-120℃的温度下烘干1小时;
S3:将PTFE薄膜和玻纤基布在热压压力为0.7-1MPa、热压温度为200-220℃、热压时间为10-15s的条件下高温热压覆膜,制得特氟龙透气输送带。
2.如权利要求1所述的特氟龙透气输送带的制作方法,其特征在于,在所述S1中,在所述烘干前还包括:
将所述玻纤基布轧干,轧余率为80-100%。
3.如权利要求1所述的特氟龙透气输送带的制作方法,其特征在于,所述整理液包括含固量70%的聚四氟乙烯乳液和含固量30%的硅油乳液。
4.如权利要求1所述的特氟龙透气输送带的制作方法,其特征在于,所述偶联剂为硅烷偶联剂。
5.如权利要求1所述的特氟龙透气输送带的制作方法,其特征在于,所述PTFE薄膜的厚度为0.5-1mm。
6.如权利要求1所述的特氟龙透气输送带的制作方法,其特征在于,使用整理液将PTFE薄膜粘接在玻纤基布上包括:
将所述整理液作为粘结剂在玻纤基布和PTFE薄膜之间涂覆,涂覆厚度为0.3-0.4mm。
7.一种特氟龙透气输送带,其特征在于,由上述1-6任一项所述的特氟龙透气输送带的制作方法制成。
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CN111391372A (zh) * | 2020-03-23 | 2020-07-10 | 上海井辰复合材料有限公司 | 复合ptfe膜的特氟龙布及其制备方法和应用 |
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