CN106930135B - 一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺 - Google Patents
一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺 Download PDFInfo
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Abstract
本发明公开了一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,包括如下步骤:a)烘干筒毛糙处理、b)不粘涂层涂覆、c)高温固化装置安装、d)不粘涂层固化、e)不粘涂层水冷定型和f)高温固化装置拆除,本发明通过在烘干筒外壁利用滚花刀加工出花纹使其形成毛糙,使得过滤纸剥离面也呈毛糙状,并在烘干筒上设置不粘涂层,能够防止过滤纸粘附在烘干筒中,并且在烘干机中直接对烘干筒进行加工和处理,省去烘干筒的拆卸工序,与此同时利用在烘干机上设置高温固化装置对不粘涂层进行直接固定,使得不粘涂层成型更加方便,与现有技术相比,由本发明加工的过滤纸具有双面毛糙,增加了过滤纸厚度,而且更加蓬松,提高了产品质量。
Description
【技术领域】
本发明涉及过滤纸的技术领域,特别是一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺。
【背景技术】
目前,工业干燥生产中,采用的热源一般都是蒸汽,电阻丝,电热管,石英管,红外线等传统的工艺方法。特别是造纸工业,多年来一直采用烘干机由蒸汽烘干筒来对纸张进行烘干,这种工艺方法首先要对烘干筒进行预热,等烘干筒达到一定温度后,纸张绕卷通过烘干筒进行干燥处理。
然而现有的烘干筒表面为光滑形,因此利用该种结构的烘干筒生产的过滤纸在未贴合于烘干筒的一面为毛糙面,其贴合于烘干筒的一面为光滑面,因此造成过滤纸的厚度较低,而且透气性也较差,无法适应于食品包装和使用。
【发明内容】
本发明的目的就是解决现有技术中的问题,提出一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,能够实现生产双毛糙面过滤纸,提高产品质量,并方便生产。
为实现上述目的,本发明提出了一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,包括如下步骤:
a)烘干筒毛糙处理:在烘干机上利用滚花刀直接对光滑的烘干筒外壁进行挤压,使烘干筒外壁产生塑性变形而形成排列均匀的花纹,以达到烘干筒外壁变为毛糙;
b)不粘涂层涂覆:在步骤a)中所述的烘干筒外壁上均匀涂覆含有特氟龙的不粘涂料,所述不粘涂料嵌入所述花纹内且并未将花纹填平;
c)高温固化装置安装:在步骤b)中所述的烘干筒外壁上设置加热套,所述加热套由呈环状均匀布置的加热管直接置于烘干机上并罩设在烘干筒外壁上,加热管固定在保温套内,且烘干筒外壁与加热套之间留有间隙,使烘干筒能够相对于外热套进行转动;
d)不粘涂层固化:烘干筒在转动状态下由加热套对其外壁进行加热使所述步骤b)中的不粘涂层固化;
e)不粘涂层水冷定型:在步骤c)中加热套内设置冷却管,由冷却管中冷媒对经固化后的烘干筒外壁进行冷却;
f)高温固化装置拆除:在烘干机上拆除所述步骤c)中的加热套,使烘干筒可以直接用于生产。
作为优选,所述步骤b)中不粘涂料包括二氧化硅胶体、粘合剂、特氟龙、抗氧化剂、消泡剂和无机漆膜增硬剂,所述不粘涂料中二氧化硅胶体的含量为2~3份;粘合剂的含量为30~40份;特氟龙的含量为50~70份;抗氧化剂的含量为2~3份;消泡剂的含量为1~3份;无机漆膜增硬剂的含量为4~8份。
作为优选,所述粘合剂为甲基硅树脂,消泡剂为聚醚改性硅油。
作为优选,所述步骤a)中花纹的深度为0.5~2mm。
作为优选,所述步骤b)中不粘涂料的厚度为5~20μm。
作为优选,所述步骤d)中的固定温度为380℃~420℃。
作为优选,所述步骤b)中不粘涂料还包括流平剂,所述流平剂为聚丙烯酸含氟酯。
作为优选,所述保温套采用珍珠棉,加热管嵌入在珍珠棉内并由珍珠棉将其固定成环状排列。
本发明的有益效果:本发明通过在烘干筒外壁利用滚花刀加工出花纹使其形成毛糙,改变传统烘干筒的光滑结构,使得过滤纸经烘干从烘干筒中剥离后,使得剥离面也呈毛糙状,并在烘干筒上设置不粘涂层,能够防止过滤纸粘附在烘干筒中,克服难以剥离的问题,同时能够避免过滤纸的纤维填覆花纹,延长烘干筒的使用寿命,并且在烘干机中直接对烘干筒进行加工和处理,省去烘干筒的拆卸工序,与此同时利用在烘干机上设置高温固化装置对不粘涂层进行直接固定,使得不粘涂层成型更加方便,与现有技术相比,由本发明加工的过滤纸具有双面毛糙,增加了过滤纸厚度,而且更加蓬松,提高了产品质量。
本发明的特征及优点将通过实施例进行详细说明。
【具体实施方式】
本发明包括如下步骤:
a)烘干筒毛糙处理:在烘干机上利用滚花刀直接对光滑的烘干筒外壁进行挤压,使烘干筒外壁产生塑性变形而形成排列均匀的花纹,花纹的深度为0.5~2mm,以达到烘干筒外壁变为毛糙;利用滚花刀加工出花纹的工艺,改变现有技术中由喷砂方式使烘干筒变得毛糙的方式,能够避免过滤纸的纤维填覆花纹,延长烘干筒的使用寿命;
b)不粘涂层涂覆:在步骤a)中所述的烘干筒外壁上均匀涂覆含有特氟龙的不粘涂料,不粘涂料的厚度为5~20μm,所述不粘涂料嵌入所述花纹内且并未将花纹填平,所述步骤b)中不粘涂料包括二氧化硅胶体、粘合剂、特氟龙、抗氧化剂、消泡剂和无机漆膜增硬剂,所述不粘涂料中二氧化硅胶体的含量为2~3份;粘合剂的含量为30~40份;特氟龙的含量为50~70份;抗氧化剂的含量为2~3份;消泡剂的含量为1~3份;无机漆膜增硬剂的含量为4~8份;所述粘合剂为甲基硅树脂,甲基硅树脂是一种溶解在甲苯中的甲基硅树脂。这种树脂有很高的SiO2含量(完全氧化后约含有80%SiO2,按照固体树脂含量计算[DSC])它是用于300℃以上环境的完美粘合剂,消泡剂为聚醚改性硅油,不粘涂料还包括流平剂,所述流平剂为聚丙烯酸含氟酯;
特氟龙是一种使用了氟取代聚乙烯中所有氢原子的人工合成高分子材料。这种材料具有抗酸抗碱、抗各种有机溶剂的特点,几乎不溶于所有的溶剂。同时,聚四氟乙烯具有耐高温的特点,它的摩擦系数极低,所以可作润滑作用之馀,亦成为了不粘锅和水管内层的理想涂料。
c)高温固化装置安装:在步骤b)中所述的烘干筒外壁上设置加热套,所述加热套由呈环状均匀布置的加热管直接置于烘干机上并罩设在烘干筒外壁上,加热管固定在保温套内,且烘干筒外壁与加热套之间留有间隙,使烘干筒能够相对于外热套进行转动,所述保温套采用珍珠棉,加热管嵌入在珍珠棉内并由珍珠棉将其固定成环状排列;在烘干机中直接对烘干筒进行加工和处理,省去烘干筒的拆卸工序;
d)不粘涂层固化:烘干筒在转动状态下由加热套对其外壁进行加热使所述步骤b)中的不粘涂层固化,所述固定温度为380℃~420℃;利用在烘干机上直接设置高温固化装置,对不粘涂层进行直接固定,使得不粘涂层成型更加方便,由于烘干筒尺寸较大,现有技术中对烘干筒进行高温固化需经长途运输至专用场所进行加工和处理,导致加工效率和成本无法与实际生产匹配;
e)不粘涂层水冷定型:在步骤c)中加热套内设置冷却管,由冷却管中冷媒对经固化后的烘干筒外壁进行冷却;
f)高温固化装置拆除:在烘干机上拆除所述步骤c)中的加热套,使烘干筒可以直接用于生产。
Claims (8)
1.一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,其特征在于:包括如下步骤:
a)烘干筒毛糙处理:在烘干机上利用滚花刀直接对光滑的烘干筒外壁进行挤压,使烘干筒外壁产生塑性变形而形成排列均匀的花纹,以达到烘干筒外壁变为毛糙;
b)不粘涂层涂覆:在步骤a)中所述的烘干筒外壁上均匀涂覆含有特氟龙的不粘涂料,所述不粘涂料嵌入所述花纹内且并未将花纹填平;
c)高温固化装置安装:在步骤b)中所述的烘干筒外壁上设置加热套,所述加热套由呈环状均匀布置的加热管直接置于烘干机上并罩设在烘干筒外壁上,加热管固定在保温套内,且烘干筒外壁与加热套之间留有间隙,使烘干筒能够相对于加热套进行转动;
d)不粘涂层固化:烘干筒在转动状态下由加热套对其外壁进行加热使所述步骤b)中的不粘涂层固化;
e)不粘涂层水冷定型:在步骤c)中加热套内设置冷却管,由冷却管中冷媒对经固化后的烘干筒外壁进行冷却;
f)高温固化装置拆除:在烘干机上拆除所述步骤c)中的加热套,使烘干筒可以直接用于生产。
2.根据权利要求1所述的一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,其特征在于:所述步骤b)中不粘涂料包括二氧化硅胶体、粘合剂、特氟龙、抗氧化剂、消泡剂和无机漆膜增硬剂,所述不粘涂料中二氧化硅胶体的含量为2~3份;粘合剂的含量为30~40份;特氟龙的含量为50~70份;抗氧化剂的含量为2~3份;消泡剂的含量为1~3份;无机漆膜增硬剂的含量为4~8份。
3.根据权利要求2所述的一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,其特征在于:所述粘合剂为甲基硅树脂,消泡剂为聚醚改性硅油。
4.根据权利要求1所述的一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,其特征在于:所述步骤a)中花纹的深度为0.5~2mm。
5.根据权利要求1所述的一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,其特征在于:所述步骤b)中不粘涂料的厚度为5~20μm。
6.根据权利要求1所述的一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,其特征在于:所述步骤d)中的固化温度为380℃~420℃。
7.根据权利要求1所述的一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,其特征在于:所述步骤b)中不粘涂料还包括流平剂,所述流平剂为聚丙烯酸含氟酯。
8.根据权利要求1所述的一种食品级过滤纸专用烘干机的不粘烘干筒加工工艺,其特征在于:所述保温套采用珍珠棉,加热管嵌入在珍珠棉内并由珍珠棉将其固定成环状排列。
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