CN116988337A - 一种可降解瓦楞纸板及其制备工艺 - Google Patents
一种可降解瓦楞纸板及其制备工艺 Download PDFInfo
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Abstract
本发明涉及包装材料技术领域,具体涉及一种可降解瓦楞纸板及其制备工艺。其技术要点如下:瓦楞纸板包括面纸层、瓦楞层和里纸层,瓦楞层中含有菌丝体材料;菌丝体材料在瓦楞层的原材料中所占的质量分数,由预先设定的瓦楞纸板的规格确定。本发明在瓦楞纸中添加可降解的菌丝体材料,提高瓦楞纸板抗拉强度的同时,提高了瓦楞纸板的耐高温、耐酸碱腐蚀性能;同时,在制备工艺中,综合考虑菌丝体材料的克重以及瓦楞层的厚度等因素,选择最佳的菌丝体材料掺和量,在保证瓦楞纸板力学性能的同时,减少瓦楞纸板的克重。
Description
技术领域
本发明涉及包装材料技术领域,具体涉及一种可降解瓦楞纸板及其制备工艺。
背景技术
瓦楞纸板以其优良的缓冲保护性能,良好的印刷展示性及绿色环保优势成为目前主要的纸制品运输包装容器,在各类商品的运输中都得到了广泛应用。
现有技术中,为了提高瓦楞纸板的强度,通常会在瓦楞纸层添加纤维材料。但是纤维材料难以降解,且在原纸制备过程中,纤维材料的分散性较差,容易造成团聚,影响瓦楞纸板的力学性能。
发明内容
本发明的第一个目的是开发一种可降解瓦楞纸板,在瓦楞纸中添加可降解的菌丝体材料,提高瓦楞纸板抗拉强度的同时,提高了瓦楞纸板的耐高温、耐酸碱腐蚀性能。
本发明的第二个目的是开发一种可降解瓦楞纸板的制备工艺,综合考虑菌丝体材料的克重以及瓦楞层的厚度等因素,选择最佳的菌丝体材料掺和量,在保证瓦楞纸板力学性能的同时,减少瓦楞纸板的克重。
本发明的上述技术目的是通过以下技术方案得以实现的:
本发明提供的一种可降解瓦楞纸板,包括面纸层、瓦楞层和里纸层,瓦楞纸板的瓦楞层中含有菌丝体材料;菌丝体材料在瓦楞层中所占的质量分数由预先设定的瓦楞纸板的规格确定。
进一步的,菌丝体材料是由长满菌丝的培养基烘干破碎后得到。
进一步的,本发明中采用的菌丝体材料的制备方法,具体为,将食用菌接种到培养基上,在黑暗中培养,直到培养基上长满菌丝,将长满菌丝的培养基烘干,破碎,得到菌丝体材料。
进一步的,上述培养基与瓦楞层的原材料中的纸浆中的浆体的组分和配比相同。
进一步的,按照重量份数计算,纸浆包括如下组分:浆料60~100份、玉米改性淀粉8~12份、纳米气相二氧化硅5~7份、有机膨润土6~10份、丙烯酸酯1~4份、黄原胶2~4份、分散剂1~3份和防霉剂1~4份。
进一步的,浆料与菌丝体材料中的培养基的成分相同,按照质量份数计算,包括:秸秆70~90份、麦麸8~28份、石灰0.5~1.5份和石膏0.5~1.5份。
进一步的,食用菌是香菇、草菇、木耳或银耳中的任意一种。
进一步的,预先设定的瓦楞纸板的规格,包括如下参数:瓦楞纸板的面纸层的厚度、瓦楞层的厚度、里纸层的厚度、瓦楞纸板的总克重、里纸层的克重和面纸层的克重;其中,瓦楞层的厚度为瓦楞层的楞的垂直高度,具体为,瓦楞层的弯折部的顶点到里纸层或面纸层的垂直距离。
本发明还提供了一种可降解瓦楞纸板的制备工艺,由以下技术方案实现的。
本发明提供的可降解瓦楞纸板的制备工艺,包括如下操作步骤:
S1、根据实际需要确定所要制备的瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度;
S2、根据实际需要确定所要制备的瓦楞纸板的总克重、里纸层的克重和面纸层的克重;
S3、根据瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度以及瓦楞纸板的总克重、里纸层的克重和面纸层的克重,确定菌丝体材料在瓦楞层的原材料中所占的质量分数;
S4、制备瓦楞层;
S5、将里纸层、瓦楞层和面纸层采用胶水粘合后烘干得到瓦楞纸板。
进一步的,瓦楞层为波浪状,分为弯折部和直线部,在步骤S5的粘合过程中,弯折部分别与里纸层和面纸层的内表面连接;
直线部与里纸层或面纸层的夹角大小通过瓦楞纸板的瓦楞层的厚度和菌丝体材料在瓦楞层中所占的质量分数确定。
进一步的,在选择直线部与里纸层或面纸层的夹角大小时,当(h1+h3)/h2>0.5且p≤0.4时,直线部与里纸层或面纸层的夹角选择60°;
当(h1+h3)/h2≤0.5且p≤0.4或(h1+h3)/h2>0.5且p>0.4时,直线部与里纸层或面纸层的夹角选择45°;
当(h1+h3)/h2≤0.5且p>0.4时,直线部与里纸层或面纸层的夹角选择30°;
其中,p为菌丝体材料在瓦楞层的原材料中所占的质量分数,单位是1;
h1、h2和h3分别为瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度,单位是mm。
进一步的,步骤S3的具体操作为,将瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度以及瓦楞纸板的总克重、里纸层的克重和面纸层的克重,代入公式中,计算出菌丝体材料在瓦楞层的原材料中所占的质量分数;
公式为:
其中,p为菌丝体材料在瓦楞层的原材料中所占的质量分数,单位是1;
h1、h2和h3分别为瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度,单位是mm;
W总、W外和W里分别为瓦楞纸板的总克重、里纸层的克重和面纸层的克重,单位是m2/g。
进一步的,步骤S4的具体操作为:
S401、将菌丝体材料按照步骤S3中确定的质量分数加入到纸浆中,搅拌均匀,通过输送泵送入造纸机中进行抄造,上网形成纸页,然后压榨脱水、干燥,得到瓦楞原纸;
S402、将瓦楞原纸经压楞机进行压楞,得到压楞的瓦楞原纸;
S403、采用胶黏剂,将2~4张压楞的瓦楞原纸进行粘结,形成瓦楞层。
综上所述,本发明具有以下有益效果:
本发明在瓦楞纸中添加可降解的菌丝体材料,提高瓦楞纸板抗拉强度的同时,提高了瓦楞纸板的耐高温、耐酸碱腐蚀性能。
同时,在制备工艺中,综合考虑菌丝体材料的克重以及瓦楞层的厚度等因素,选择最佳的菌丝体材料掺和量,在保证瓦楞纸板力学性能的同时,减少瓦楞纸板的克重。
具体实施方式
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,对依据本发明提出的一种可降解瓦楞纸板及其制备工艺,其具体实施方式、特征及其功效,详细说明如后。
需要说明的是,本具体实施方式中的原材料来源如下:
里纸层:江苏理文造纸有限公司(牛皮纸);
面纸层:江苏理文造纸有限公司(牛皮纸);
胶水:江苏鸣谷国际贸易有限公司(白乳胶);
胶黏剂:江苏鸣谷国际贸易有限公司(玉米改性淀粉);
丙烯酸酯:山东首化化学有限公司。
实施例1:一种可降解瓦楞纸板
本实施例提供的可降解瓦楞纸板,包括面纸层、瓦楞层和里纸层,瓦楞层中含有菌丝体材料;菌丝体材料在瓦楞层的原材料中所占的质量分数,由预先设定的瓦楞纸板的规格确定。
其中预先设定的瓦楞纸板的规格包括瓦楞纸板的面纸层的厚度、瓦楞层的厚度、里纸层的厚度、瓦楞纸板的总克重、里纸层的克重和面纸层的克重;其中,瓦楞层的厚度为瓦楞层的楞的垂直高度。
实施例2:一种可降解瓦楞纸板
作为实施例1的优选方案,在本实施例中,菌丝体材料是通过将长满菌丝的培养基烘干并破碎而得到的。采用这种制备方法获得的菌丝体材料,在掺入纸浆后,菌丝体与纸浆中的纤维绞合在一起,形成更加稳固的特殊结构,大幅提高瓦楞层的力学性能。同时,菌丝体材料还具有耐高温和隔音的作用。此外,菌丝体材料的弹性模量更大,在一定程度上提高了瓦楞层甚至整个瓦楞纸板的韧性,即使遭受破坏后也不会扩大撕裂面积。
菌丝体材料的具体制备方法如下:
将培养基质量的5%的食用菌接种到培养基中,在25℃下的黑暗中培养10天,得到长满菌丝的培养基,再将长满菌丝的培养基在65℃下烘干24小时,最后将其破碎至150目。
其中,按照重量份数计算,培养基的配方优选为,秸秆70~90份、麦麸8~28份、石灰0.5~1.5份、石膏0.5~1.5份;选择上述材料作为培养基的好处在于,上述培养基的材料同样能够作为本实施例中的纸浆的组分,在后续的纸浆与菌丝体材料的混料中,能够保证菌丝体材料的分散性。
在本实施例中,食用菌可以是香菇、草菇、木耳或银耳中的任意一种。上述食用菌的菌丝体生长较快,且菌丝韧性较大,更加有利于提高瓦楞层的抗开裂性能。
实施例3:一种可降解瓦楞纸板及其制备工艺
本实施例提供实施例2的可降解瓦楞纸板的制备工艺,具体如下:
S1、确定所要制备的瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度;
S2、确定所要制备的瓦楞纸板的总克重、里纸层的克重和面纸层的克重;
S3、根据瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度以及瓦楞纸板的总克重、里纸层的克重和面纸层的克重,确定菌丝体材料在瓦楞层的原材料中所占的质量分数;
S4、制备瓦楞层;
S5、将里纸层、瓦楞层和面纸层采用胶水粘合后,在120℃下烘干6个小时,得到瓦楞纸板。
其中,根据实际需求,面纸层的厚度为4mm,克重为70m2/g;瓦楞层的厚度为13mm;里纸层的厚度选择为3mm,克重为60m2/g;瓦楞纸板总克重为280m2/g。
由于菌丝体材料的重量较大,若掺和量过大则导致瓦楞层的重量过大,一方面不利于瓦楞纸板的轻量化;另一方面,若瓦楞层的重量过大,其与面纸层和里纸层之间的重量比过大,在遭受破坏时,会加剧破坏力对里纸层和面纸层的作用,导致里纸层和面纸层更易破碎。
因此,本实施例中,综合考虑里纸层、瓦楞层和面纸层之间的厚度比例,以及瓦楞纸板的总克重,利用公式对本实施例中,菌丝体材料在瓦楞层的原材料中所占的质量分数为进行计算,既保证了菌丝体材料在瓦楞层发挥作用,又防止菌丝体材料的添加,给瓦楞纸板的整体力学效果带来负面影响。
其中,p为菌丝体材料在瓦楞层中所占的质量分数,单位是1;
h1、h2和h3分别为瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度,单位是mm;
W总、W外和W里分别为瓦楞纸板的总克重、里纸层的克重和面纸层的克重,单位是m2/g
经计算可知,在本实施例中,菌丝体材料在瓦楞层的原材料中所占的质量分数为32%,即p=0.32。
则根据上述计算结果,本实施例中对瓦楞层的制备方法如下:
首先,制备纸浆,按照重量份数计算,将浆料100份、玉米改性淀粉12份、纳米气相二氧化硅7份、有机膨润土10份、丙烯酸酯4份、黄原胶4份、分散剂3份和防霉剂1份搅拌均匀;
其中,按照重量份数计算,浆料包括秸秆80份、麦麸18份、石灰1.2份和石膏0.8份,然后采用与浆料相同的材料作为培养基,平菇作为食用菌的菌种,按照实施例2的方法制备菌丝体材料。
按照上述计算的菌丝体材料在瓦楞层的原材料中所占的质量分数,将纸浆和菌丝体材料混合均匀,通过输送泵送入造纸机中进行抄造,上网形成纸页,然后压榨脱水、干燥,得到瓦楞原纸;将瓦楞原纸经压楞机进行压楞,得到压楞的瓦楞原纸;采用胶黏剂,将4张压楞的瓦楞原纸进行粘结,形成瓦楞层。
由于本实施例中,p=0.32,(h1+h3)/h2=0.53,则为(h1+h3)/h2>0.5且p≤0.4时,瓦楞层的直线部与里纸层或面纸层的夹角选择60°;如果此时选择较小的角度,则由于菌丝体材料的掺合量较小,无法提供更强的抗压能力;若选择较大的角度,则由于瓦楞层的厚度较大,为了维持更大的角度,会大幅增加瓦楞层材料的用量,并由于瓦楞纸板总克重的限制,导致其他组分的掺合量被压缩,进而影响瓦楞纸板的机械强度。
因此在本实施例的步骤S5中,在粘合过程中,将瓦楞层的直线部与里纸层或面纸层的夹角控制在60°。
实施例4:一种可降解瓦楞纸板及其制备工艺
本实施例提供另一种实施例2的可降解瓦楞纸板的制备工艺
与实施例3不同之处在于,本实施例中,面纸层的厚度为5mm,克重为80m2/g;瓦楞层的厚度为15mm;里纸层的厚度选择为5mm,克重为70m2/g;瓦楞纸板总克重为320m2/g。
因此,利用公式计算可知,在本实施例中,菌丝体材料在瓦楞层的原材料中所占的质量分数为46%。
其中,p为菌丝体材料在瓦楞层的原材料中所占的质量分数,单位是1;
h1、h2和h3分别为瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度,单位是mm;
W总、W外和W里分别为瓦楞纸板的总克重、里纸层的克重和面纸层的克重,单位是m2/g
则由于本实施例中,p=0.46,(h1+h3)/h2=0.66,则为(h1+h3)/h2>0.5且p>0.4时,直线部与里纸层或面纸层的夹角选择45°。
因此在本实施例的步骤S5中,在粘合过程中,将瓦楞层的直线部与里纸层或面纸层的夹角控制在45°。
其余材料组分配方以及制备步骤和参数均与实施例3相同。
对比例1
本对比例的瓦楞纸板所有原材料组分配方以及生产工艺参数步骤均与实施例3相同;不同之处在于,本对比例中,不采用公式计算菌丝体材料在瓦楞层的原材料中所占的质量分数,而直接采用50%;且在步骤S5中的粘合过程中,瓦楞层的直线部与里纸层或面纸层的夹角直接控制在60°。
对比例2
本对比例的瓦楞纸板所有原材料组分配方以及生产工艺参数步骤均与实施例3相同;不同之处在于,本对比例中,不采用公式计算菌丝体材料在瓦楞层的原材料中所占的质量分数,而直接采用20%;且在步骤S5中的粘合过程中,瓦楞层的直线部与里纸层或面纸层的夹角直接控制在60°。
对比例3
本对比例的瓦楞纸板所有原材料组分配方以及生产工艺参数步骤均与实施例3相同;不同之处在于,本对比例中,在步骤S5中的粘合过程中,瓦楞层的直线部与里纸层或面纸层的夹角直接控制在45°。
对比例4
本对比例的瓦楞纸板所有原材料组分配方以及生产工艺参数步骤均与实施例3相同;不同之处在于,在步骤S5中的粘合过程中,瓦楞层的直线部与里纸层或面纸层的夹角直接控制在70°。
性能测试
对实施例3~4以及对比例1~4中获得的瓦楞纸板的性能进行测试,结果见表1。
表1性能测试结果
根据上述数据对比可知,采用本发明提供的公式计算后,对菌丝体材料的掺入量进行了精确的限定,使瓦楞纸板的机械强度以及防潮性和气密性得到了提高。
同时本发明提供的另一个公式对瓦楞层与里纸层或面纸层之间的夹角进行了精确的选择,大幅提高了瓦楞纸板的抗压强度。
以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例展示如上,但并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容做出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
Claims (10)
1.一种可降解瓦楞纸板,其特征在于,所述瓦楞纸板包括面纸层、瓦楞层和里纸层;所述瓦楞纸板的瓦楞层中含有菌丝体材料;所述菌丝体材料在瓦楞层的原材料中所占的质量分数,由预先设定的瓦楞纸板的规格确定。
2.根据权利要求1所述的一种可降解瓦楞纸板,其特征在于,所述菌丝体材料是由长满菌丝的培养基烘干破碎后得到。
3.根据权利要求2所述的可降解瓦楞纸板,其特征在于,所述菌丝体材料的制备方法,具体为,将食用菌接种到培养基上,在黑暗中培养,直到培养基上长满菌丝,将长满菌丝的培养基烘干,破碎,得到所述菌丝体材料。
4.根据权利要求3所述的可降解瓦楞纸板,其特征在于,所述培养基与瓦楞层的原材料中的纸浆中的浆体的组分和配比相同。
5.根据权利要求1所述的一种可降解瓦楞纸板,其特征在于,所述预先设定的瓦楞纸板的规格,包括如下参数:瓦楞纸板的面纸层的厚度、瓦楞层的厚度、里纸层的厚度、瓦楞纸板的总克重、里纸层的克重和面纸层的克重;其中,所述瓦楞层的厚度为瓦楞层的楞的垂直高度。
6.一种如权利要求1~5任意一项所述的可降解瓦楞纸板的制备工艺,其特征在于,包括如下操作步骤:
S1、根据实际需求确定所要制备的瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度;
S2、根据实际需求确定所要制备的瓦楞纸板的总克重、里纸层的克重和面纸层的克重;
S3、根据瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度以及瓦楞纸板的总克重、里纸层的克重和面纸层的克重,确定菌丝体材料在瓦楞层的原材料中所占的质量分数;
S4、制备瓦楞层;
S5、将里纸层、瓦楞层和面纸层采用胶水粘合后烘干得到所述瓦楞纸板。
7.根据权利要求6所述的可降解瓦楞纸板的制备工艺,其特征在于,所述瓦楞层为波浪状,分为弯折部和直线部,在所述步骤S5的粘合过程中,弯折部分别与里纸层和面纸层的内表面连接;
直线部与里纸层或面纸层的夹角大小通过瓦楞纸板的瓦楞层的厚度和菌丝体材料在瓦楞层的原材料中所占的质量分数确定。
8.根据权利要求6所述的可降解瓦楞纸板的制备工艺,其特征在于,当(h1+h3)/h2>0.5且p≤0.4时,所述直线部与里纸层或面纸层的夹角选择60°;
当(h1+h3)/h2≤0.5且p≤0.4或(h1+h3)/h2>0.5且p>0.4时,所述直线部与里纸层或面纸层的夹角选择45°;
当(h1+h3)/h2≤0.5且p>0.4时,所述直线部与里纸层或面纸层的夹角选择30°;
其中,p为菌丝体材料在瓦楞层中所占的质量分数,单位是1;
h1、h2和h3分别为瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度,单位是mm,瓦楞层的厚度为瓦楞层的楞的垂直高度。
9.根据权利要求6所述的可降解瓦楞纸板的制备工艺,其特征在于,所述步骤S3的具体操作为,将瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度以及瓦楞纸板的总克重、里纸层的克重和面纸层的克重,代入公式中,计算出菌丝体材料在瓦楞层的原材料中所占的质量分数;
公式为:;
其中,p为菌丝体材料在瓦楞层的原材料中所占的质量分数,单位是1;
h1、h2和h3分别为瓦楞纸板的面纸层的厚度、瓦楞层的厚度和里纸层的厚度,单位是mm,瓦楞层的厚度为瓦楞层的楞的垂直高度;
W总、W外和W里分别为瓦楞纸板的总克重、里纸层的克重和面纸层的克重,单位是m2/g。
10.根据权利要求6的所述的可降解瓦楞纸板的制备工艺,其特征在于,所述步骤S4的具体操作为:
S401、将菌丝体材料按照步骤S3中确定的质量分数加入到纸浆中,搅拌均匀,通过输送泵送入造纸机中进行抄造,上网形成纸页,然后压榨脱水、干燥,得到瓦楞原纸;
S402、将瓦楞原纸经压楞机进行压楞,得压楞的瓦楞原纸;
S403、采用胶黏剂,将2~4张压楞的瓦楞原纸进行粘结,形成瓦楞层。
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