CN115262085A - 一种水溶衬手提袋基材的制造方法 - Google Patents
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Abstract
本发明属于高分子材料纺织品技术领域，涉及一种水溶衬手提袋基材的制造方法，步骤包括：①PET树脂的制备：将PET原料加入沸水中，搅拌1h，制成浓度30‑35wt％的PET树脂，过滤掉杂质，储存备用；②PVA树脂的制备：将PVA原料加入沸水中，搅拌1h，制成浓度5‑10wt％的PVC树脂，过滤掉杂质，储存备用；③混合树脂的制备：将PET树脂与PVA树脂按1:1质量比混合，充分混合后加入渗透剂，制成混合树脂；④定型：棉网经过前段开棉及梳理系统，浸入所述混合树脂，沾有所述混合树脂的棉网再通过烘箱烘烤，出烘箱后压成0.3mm厚度的基材，然后收卷。本方法能够形成强度适合做手提袋的基材，并且树脂部分能够在95℃的水中溶解，残余物质容易降解，使用环保。
Description
技术领域
本发明涉及高分子材料纺织品技术领域，特别涉及一种水溶衬手提袋基材的制造方法。
背景技术
手提购物袋市场需求每年达到百万吨以上，目前国内同行业并无技术，可将聚乙烯醇纤维制成的布，以高温热压方式将布做熔接，而目前国外客户需要对手提购物袋需达到环保要求，目前国内企业对于手提购物袋，大部分都还是以不环保的PP材质制作，虽技术存熟，产品美观耐用，但因PP材质并非是一种环保材质，所以客户提出要采用对环境有保护的材料，取代目前部分PP的产品。
目前国内一般聚丙烯PP材质(溶解温度为165-170℃)制袋厂的设备，是利用高频率振荡的超声波煶结技术，将焊头由声波传送至PP无纺布熔接面，瞬间使无纺布产生摩擦，达到塑料熔点，从而完成固体材料迅速溶解，完成焊接。而聚乙烯醇PVA制成的基材，溶解温度为230-240℃，却无法以国内大宗制袋方式生产，导致制袋厂无法上机量产。
CN110370740A披露了一种包装膜材、面膜包装袋以及面膜包装袋的制备方法，其由包含PET(对苯二甲酸乙二酯)、PVA(聚乙烯醇)以及PE(聚乙烯)的多层材料构成，这种材料结构复杂，而且不能在热水中溶解。
因此有必要设计一种新的技术来获得一种环保的手提袋。
发明内容
本发明的主要目的在于提供一种水溶衬手提袋基材的制造方法，能够得到一种比较环保且强度合适的手提袋基材。
本发明通过如下技术方案实现上述目的：一种水溶衬手提袋基材的制造方法，步骤包括：
①PET树脂的制备：将PET原料加入沸水中，搅拌1h，制成浓度30-35wt％的PET树脂，过滤掉杂质，储存备用；
②PVA树脂的制备：将PVA原料加入沸水中，搅拌1h，制成浓度5-10wt％的PVC树脂，过滤掉杂质，储存备用；
③混合树脂的制备：将PET树脂与PVA树脂按1:1质量比混合，充分混合后加入渗透剂，制成混合树脂；
④定型：棉网经过前段开棉及梳理系统，浸入所述混合树脂，沾有所述混合树脂的棉网再通过烘箱烘烤，出烘箱后压成0.3mm厚度的基材，然后收卷。
具体的，所述步骤①中的PET原料为溶解温度120-130℃的聚对苯二甲酸乙二酯。所述步骤②中的PVA原料为溶解温度230-240℃的聚乙烯醇。
具体的，所述步骤③中加入渗透剂前搅拌时间为20min，加入渗透剂后搅拌时间为5min。
具体的，所述渗透剂的用量为混合树脂总量的0.1-0.2wt％。
具体的，所述烘箱依次分为四个加热区，四个加热区的温度分别控制为165℃、170℃、175℃和180℃，每个加热区的通过时间为9-10s。
本发明技术方案的有益效果是：
本方法能够形成强度适合做手提袋的基材，并且树脂部分能够在95℃的水中溶解，残余物质容易降解，使用环保。
具体实施方式
下面结合具体实施例对本发明作进一步详细说明。
实施例1：
①PET树脂的制备：将300kg PET原料(溶解温度120-130℃的聚对苯二甲酸乙二酯)加入700kg沸水中，搅拌1h，制成浓度30wt％的PET树脂1000kg，过滤掉杂质，储存备用；
②PVA树脂的制备：将90kg PVA原料(溶解温度230-240℃的聚乙烯醇)加入910kg沸水中，搅拌1h，制成浓度9wt％的PVC树脂1000kg，过滤掉杂质，储存备用；
③混合树脂的制备：将1000kg的PET树脂与1000kg的PVA树脂混合，搅拌20min充分混合后加入渗透剂3kg，然后再搅拌5min，制成混合树脂，导入药水槽；
④定型：棉网经过前段开棉及梳理系统，浸入药水槽中的混合树脂，沾有所述混合树脂的棉网再通过烘箱烘烤，烘箱依次分为四个加热区，四个加热区的温度分别控制为165℃、170℃、175℃和180℃，每个加热区的通过时间为9.6s，出烘箱后压成0.3mm厚度的基材，然后收卷。
实施例2：
①PET树脂的制备：将320kg PET原料(溶解温度120-130℃的聚对苯二甲酸乙二酯)加入680kg沸水中，搅拌1h，制成浓度32wt％的PET树脂1000kg，过滤掉杂质，储存备用；
②PVA树脂的制备：将100kg PVA原料(溶解温度230-240℃的聚乙烯醇)加入900kg沸水中，搅拌1h，制成浓度10wt％的PVC树脂1000kg，过滤掉杂质，储存备用；
③混合树脂的制备：将1000kg的PET树脂与1000kg的PVA树脂混合，搅拌20min充分混合后加入渗透剂2kg，然后再搅拌5min，制成混合树脂，导入药水槽；
④定型：棉网经过前段开棉及梳理系统，浸入药水槽中的混合树脂，沾有所述混合树脂的棉网再通过烘箱烘烤，烘箱依次分为四个加热区，四个加热区的温度分别控制为165℃、170℃、175℃和180℃，每个加热区的通过时间为9s，出烘箱后压成0.3mm厚度的基材，然后收卷。
实施例3：
①PET树脂的制备：将:50kg PET原料(溶解温度120-130℃的聚对苯二甲酸乙二酯)加入650kg沸水中，搅拌1h，制成浓度35wt％的PET树脂1000kg，过滤掉杂质，储存备用；
②PVA树脂的制备：将50kg PVA原料(溶解温度230-240℃的聚乙烯醇)加入950kg沸水中，搅拌1h，制成浓度5wt％的PVC树脂1000kg，过滤掉杂质，储存备用；
③混合树脂的制备：将1000kg的PET树脂与1000kg的PVA树脂混合，搅拌20min充分混合后加入渗透剂4kg，然后再搅拌5min，制成混合树脂，导入药水槽；
④定型：棉网经过前段开棉及梳理系统，浸入药水槽中的混合树脂，沾有所述混合树脂的棉网再通过烘箱烘烤，烘箱依次分为四个加热区，四个加热区的温度分别控制为165℃、170℃、175℃和180℃，每个加热区的通过时间为10s，出烘箱后压成0.3mm厚度的基材，然后收卷。
将实施例1-3得到的基材制成60cm×50cm大小的手提袋，用CN110370740A制得的60cm×50cm大小的手提袋作为对照例进行比较实验。实验方法和评价方法如下：
①强度测试：在手提袋中放入10瓶500ml的矿泉水瓶，挂在直径2英吋的木板上静置1天，若手提袋破裂则强度为劣，手提袋不破裂则强度为优。
②水溶性测试：将手提袋置于水中加热到95℃，恒温搅拌1h，观察树脂是否溶解。
结果见下表：
由表可知，实施例1-3获得的基材制造的手提袋具有足够的强度，而其树脂部分能够在95℃的水中溶解，残余物质容易降解，使用更加环保。
以上所述的仅是本发明的一些实施方式。对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。
Claims (4)
1.一种水溶衬手提袋基材的制造方法，其特征在于：步骤包括：
①PET树脂的制备：将PET原料加入沸水中，搅拌1h，制成浓度30-35wt％的PET树脂，过滤掉杂质，储存备用；
②PVA树脂的制备：将PVA原料加入沸水中，搅拌1h，制成浓度5-10wt％的PVC树脂，过滤掉杂质，储存备用；
③混合树脂的制备：将PET树脂与PVA树脂按1:1质量比混合，充分混合后加入渗透剂，制成混合树脂；
④定型：棉网经过前段开棉及梳理系统，浸入所述混合树脂，沾有所述混合树脂的棉网再通过烘箱烘烤，出烘箱后压成0.3mm厚度的基材，然后收卷。
2.根据权利要求1所述的水溶衬手提袋基材的制造方法，其特征在于：所述步骤①中的PET原料为溶解温度120-130℃的聚对苯二甲酸乙二酯。所述步骤②中的PVA原料为溶解温度230-240℃的聚乙烯醇。
3.根据权利要求1所述的水溶衬手提袋基材的制造方法，其特征在于：所述步骤③中加入渗透剂前搅拌时间为20min，加入渗透剂后搅拌时间为5min。
4.根据权利要求1所述的水溶衬手提袋基材的制造方法，其特征在于：所述烘箱依次分为四个加热区，四个加热区的温度分别控制为165℃、170℃、175℃和180℃，每个加热区的通过时间为9-10s。
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