CN115071095A - 一种pvc复合布的热熔共挤成型方法 - Google Patents
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Abstract
本发明属于塑料成型领域,公开了一种PVC复合布的热熔共挤成型方法。本发明分别通过四台挤出机、两个双腔板式机头挤出成型表层、胶层复合膜片,然后与涤纶机织布热压或冷压复合制成PVC复合布产品,同理可以做成单面PVC膜与单面机织布的复合布的产品。本发明通过热熔共挤法直接复合生产PVC复合布产品,简化了生产环节,膜与布的粘接强度高,设备投资小,生产效率高,更加环保。
Description
技术领域
本发明属于塑料成型领域,本发明涉及一种PVC复合布的热熔共挤成型方法。
背景技术
传统的PVC复合布生产方法,先采用压延法生产出压延薄膜;再将涤纶机织布两面通过涂覆的方法涂上粘结材料,然后烘干定型生产出涂层涤纶布;复合生产时首先分别预热压延薄膜、涂层涤纶布,再通过热压成型制造而成。由于压延设备、涂覆设备投资巨大,烘干定型时会释放出有毒气体,而且也不是连续生产过程,所以,生产成本高、效率低也不环保。
发明内容
鉴于现有技术存在的弊端,本发明提供了一种PVC复合布的热熔共挤成型方法,以有效解决背景技术中所提及的技术问题,通过以下技术方案实现:
一种PVC复合布的热熔共挤成型方法,本发明的PVC复合布产品分为两种,一种为双层膜,组成分别是:表层Ⅰ、胶层Ⅰ、机织布、胶层Ⅱ、表层Ⅱ;另一种为单层膜,组成分别是:表层Ⅰ、胶层Ⅰ、机织布。以双层膜的热熔共挤成型方法为例,包括如下步骤:
S1.将PVC树脂原料、无机填料及其他功能性助剂投入混料机中充分混合,制成表层混合原料;
S2.将表层混合原料加入PVC挤出机中,将热熔胶加入热熔胶挤出机中;
S3.启动PVC挤出机,调节与其连接的双腔机头使其出料均匀,关闭PVC挤出机;再启动热熔胶挤出机,调节双腔机头使其出料均匀;
S4.再次开启PVC挤出机,同时挤出PVC和热熔胶的复合膜片,与经由放布装置牵出的机织布复合,再引入复合成型装置中,经冷却定型装置、牵引装置、收卷装置生产出PVC复合布产品。
进一步的,所述步骤S3具体为:开机前单独启动PVC挤出机Ⅰ,调节双腔机头A的PVC腔阻尼块使其出料均匀;停掉PVC挤出机Ⅰ,再启动热熔胶挤出机Ⅰ,调节双腔机头A的热熔胶阻尼块使其出料均匀。
进一步的,所述步骤S3具体为:
S3.1开机前单独启动PVC挤出机Ⅰ,调节双腔机头A的PVC腔阻尼块使其出料均匀;停掉PVC挤出机Ⅰ,再启动热熔胶挤出机Ⅰ,调节双腔机头A的热熔胶阻尼块使其出料均匀;
S3.2单独启动PVC挤出机Ⅱ,调节双腔机头B的PVC腔阻尼块使其出料均匀;停掉PVC挤出机Ⅱ,再启动热熔胶挤出机Ⅱ,调节双腔机头B的热熔胶阻尼块使其出料均匀。
进一步的,步骤S1所述的PVC树脂原料包括聚氯乙烯;无机填料包括碳酸钙、滑石粉、云母粉;功能性助剂包括:稳定剂、增塑剂、润滑剂、增韧剂、偶联剂、抗氧剂、抗静电剂、耐老化剂。
进一步的,步骤S1所述的表层混合原料各配方质量份数为:PVC 100,碳酸钙80,DOP40,稳定剂4,石蜡0.4,ACR 1.5,硬脂酸0.6,钛白粉5。
进一步的,步骤S3所述的双腔机头内部设有两个独立的流道,分别连接PVC出料腔和热熔胶出料腔,PVC与热熔胶于双料腔汇合处汇合;PVC腔阻尼块斜插或垂直插入机头内部,与PVC出料腔相连;热熔胶腔阻尼块斜插或垂直插入机头内部,与热熔胶出料腔相连;PVC腔阻尼块和热熔胶腔阻尼块用来独立调节PVC和热熔胶的流速;在双腔机头前端设有模唇调整螺丝A和模唇调整螺丝B,用来调节模唇缝隙,以实现整体机头出料均匀。
进一步的,步骤S4所述的挤出机温度在150-170℃之间,机脖、机头温度设置在165-175℃之间。
本发明与现有技术相比的有益效果是:
相比传统使用的涂胶复合针织布方法或压延膜复合等方法,本发明通过热熔共挤法直接复合生产PVC复合布产品,双腔机头保证PVC与热熔胶均匀挤出,在双腔机头内部复合完成,出机头后直接与机织布牢固复合,由于采用热熔粘结方式,膜片与机织布粘结强度高;又由于采用直接成型的方法,所以,设备投资小、生产效率高、产品性能好。
附图说明
图1为本发明双层膜共挤复合法工艺流程图;
图2为本发明单层膜共挤复合法工艺流程图;
图3为本发明装置图;
图4为本发明双层膜共挤复合法产品结构简图;
图5为本发明双腔机头的结构图。
其中,1.热熔胶挤出机Ⅰ,2.PVC挤出机Ⅰ,3.热熔胶挤出机Ⅱ,4.PVC挤出机Ⅱ,5.放布装置,6.复合成型装置,7.冷却定型装置,8.牵引装置,9.收卷装置,10.PVC膜层Ⅰ,11.热熔胶层Ⅰ,12.机织布,13.热熔胶层Ⅱ,14.PVC膜层Ⅱ,15.PVC出料腔,16.热熔胶出料腔,17.PVC腔阻尼块,18.热熔胶腔阻尼块,19双料腔汇合处,20.模唇调整螺丝A,21.模唇调整螺丝B,22.双腔机头A,23.双腔机头B,24.机脖A,25.机脖B。
具体实施方式
下面通过具体实施例详述本发明,但不限制本发明的保护范围。如无特殊说明,本发明所采用的实验方法均为常规方法,所用实验器材、材料、试剂等均可从商业途径获得。
实施例1双层膜共挤复合法
按照如下质量份数:PVC 100,碳酸钙80,DOP 40,稳定剂4,石蜡0.4,ACR 1.5,硬脂酸0.6,钛白粉5,将PVC树脂原料、无机填料及其他功能性助剂投入混料机中充分混合,制成表层混合原料。
将表层混合原料分别加入PVC挤出机Ⅰ2、PVC挤出机Ⅱ4中,将热熔胶分别加入热熔胶挤出机Ⅰ1、热熔胶挤出机Ⅱ3中;
开机前单独启动PVC挤出机Ⅰ2,调节双腔机头A22的PVC腔阻尼块17使其出料均匀;停掉PVC挤出机Ⅰ2,再启动热熔胶挤出机Ⅰ1,调节双腔机头A22的热熔胶阻尼块18使其出料均匀;
单独启动PVC挤出机Ⅱ4,调节双腔机头B23的PVC腔阻尼块17使其出料均匀;停掉PVC挤出机Ⅱ4,再启动热熔胶挤出机Ⅱ3,调节双腔机头B23的热熔胶阻尼块18使其出料均匀;
两个双腔机头都调节完成后,再次开启PVC挤出机Ⅰ2和PVC挤出机Ⅱ4,调节四台挤出机温度在150-170℃之间,机脖、双腔机头温度设置在165-175℃之间。双腔机头A22和双腔机头B23同时分别挤出PVC和热熔胶的复合膜片,与经由放布装置5牵出的机织布复合,再引入复合成型装置6中,经冷却定型装置7、牵引装置8、收卷装置9生产出PVC复合布产品。
实施例2单层膜挤出复合法
按照如下质量份数:PVC 100,碳酸钙80,DOP 40,稳定剂4,石蜡0.4,ACR 1.5,硬脂酸0.6,钛白粉5,将PVC树脂原料、无机填料及其他功能性助剂投入混料机中充分混合,制成表层混合原料。
将表层混合原料加入PVC挤出机Ⅰ2中,将热熔胶加入热熔胶挤出机Ⅰ1中;
开机前单独启动PVC挤出机Ⅰ2,调节双腔机头A22的PVC腔阻尼块17使其出料均匀;停掉PVC挤出机Ⅰ2,再启动热熔胶挤出机Ⅰ1,调节双腔机头A22的热熔胶阻尼块18使其出料均匀;
再次开启PVC挤出机Ⅰ2,调节两台挤出机温度在150-170℃之间,机脖、双腔机头温度设置在165-175℃之间。双腔机头A22挤出PVC和热熔胶的复合膜片,与经由放布装置5牵出的机织布复合,再引入复合成型装置6中,经冷却定型装置7、牵引装置8、收卷装置9生产出PVC复合布产品。
以上所述实施方式仅为本发明的优选实施例,而并非本发明可行实施的全部实施例。对于本领域一般技术人员而言,在不背离本发明原理和精神的前提下对其所作出的任何显而易见的改动,都应当被认为包含在本发明的权利要求保护范围之内。
本发明的加工方法可以实现线速度10米/分钟,和传统方式相比效率可以提高30%以上。同时我们测试使用我们现在的方法制作的复合布,比直接涂胶制作的复合布,剥离强度也提高10%左右。而且生产环境更加环保,低污染。
Claims (7)
1.一种PVC复合布的热熔共挤成型方法,其特征在于,包括如下步骤:
S1.将PVC树脂原料、无机填料及其他功能性助剂投入混料机中充分混合,制成表层混合原料;
S2.将表层混合原料加入PVC挤出机中,将热熔胶加入热熔胶挤出机中;
S3.启动PVC挤出机,调节与其连接的双腔机头使其出料均匀,关闭PVC挤出机;再启动热熔胶挤出机,调节双腔机头使其出料均匀;
S4.再次开启PVC挤出机,同时挤出PVC和热熔胶的复合膜片,与经由放布装置(5)牵出的机织布复合,再引入复合成型装置(6)中,经冷却定型装置(7)、牵引装置(8)、收卷装置(9)生产出PVC复合布产品。
2.如权利要求1所述的一种PVC复合布的热熔共挤成型方法,其特征在于,所述步骤S3具体为:开机前单独启动PVC挤出机Ⅰ(2),调节双腔机头A(22)的PVC腔阻尼块(17)使其出料均匀;停掉PVC挤出机Ⅰ(2),再启动热熔胶挤出机Ⅰ(1),调节双腔机头A(22)的热熔胶阻尼块(18)使其出料均匀。
3.如权利要求1所述的一种PVC复合布的热熔共挤成型方法,其特征在于,所述步骤S3具体为:
S3.1开机前单独启动PVC挤出机Ⅰ(2),调节双腔机头A(22)的PVC腔阻尼块(17)使其出料均匀;停掉PVC挤出机Ⅰ(2),再启动热熔胶挤出机Ⅰ(1),调节双腔机头A(22)的热熔胶阻尼块(18)使其出料均匀;
S3.2单独启动PVC挤出机Ⅱ(4),调节双腔机头B(23)的PVC腔阻尼块(17)使其出料均匀;停掉PVC挤出机Ⅱ(4),再启动热熔胶挤出机Ⅱ(3),调节双腔机头B(23)的热熔胶阻尼块(18)使其出料均匀。
4.如权利要求1所述的一种PVC复合布的热熔共挤成型方法,其特征是,步骤S1所述的PVC树脂原料包括聚氯乙烯;无机填料包括碳酸钙、滑石粉、云母粉;功能性助剂包括:稳定剂、增塑剂、润滑剂、增韧剂、偶联剂、抗氧剂、抗静电剂、耐老化剂。
5.如权利要求1所述的一种PVC复合布的热熔共挤成型方法,其特征是,步骤S1所述的表层混合原料各配方质量份数为:PVC 100,碳酸钙80,DOP 40,稳定剂4,石蜡0.4,ACR1.5,硬脂酸0.6,钛白粉5。
6.如权利要求1所述的一种PVC复合布的热熔共挤成型方法,其特征是,步骤S3所述的双腔机头内部设有两个独立的流道,分别连接PVC出料腔(15)和热熔胶出料腔(16),PVC与热熔胶于双料腔汇合处(19)汇合;PVC腔阻尼块(17)斜插或垂直插入机头内部,与PVC出料腔(15)相连;热熔胶腔阻尼块(18)斜插或垂直插入机头内部,与热熔胶出料腔(16)相连;PVC腔阻尼块(17)和热熔胶腔阻尼块(18)用来独立调节PVC和热熔胶的流速;在双腔机头前端设有模唇调整螺丝A(20)和模唇调整螺丝B(21),用来调节模唇缝隙,以实现整体机头出料均匀。
7.如权利要求1所述的一种PVC复合布的热熔共挤成型方法,其特征是,步骤S4所述的挤出机温度在150-170℃之间,机脖、双腔机头温度设置在165-175℃之间。
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