CN116285391A - 保温管及其制备方法 - Google Patents
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Abstract
本申请涉及一种保温管及其制备方法，涉及管制品制作技术领域，保温管由以下重量份的原料经硫化发泡制成：胶片1900‑2100份、硫磺1‑1.5份、氧化锌7‑9份、发泡助剂55‑65份；制备方法包括以下步骤：将胶片原料通过捏炼机混炼均匀，门尼粘度控制在68‑73，冷却后形成胶片；利用得到的胶片，配合硫磺、氧化锌和发泡助剂混炼均匀后，通过挤出机挤出管状胶管；对得到的胶管进行硫化和发泡，然后冷却得到保温管。该申请能够增加保温管的闭孔率的同时延长使用寿命。
Description
技术领域
本申请涉及管制品制作技术领域，尤其是涉及一种保温管及其制备方法。
背景技术
随着人们对室内温度适宜性的需求提升，空调的安装成为普遍现象。空调的作用是一般是将冷空气通过管道输送至温度较高的区域或者将热空气通过管道输送至温度较低的区域。为了减少冷空气或热空气传输过程中与外界环境的热量交换，传输管道上会套设保温管。
相关技术见申请号为202010379292.X的专利，其公开了一种PPR管用节能保温发泡橡胶的制备方法，包括以下重量份数的原料：混炼胶150-250份、湿凝胶15-50份、发泡剂5-10份、发泡助剂0.1-1份和硫化剂0.1-10份，经过预混炼、湿凝胶制备、水解、陈化、混炼、硫化、预发泡和硫化等步骤得到成品。
针对上述相关技术，制备的PPR管套设在室外的传输管道上时，容易产生老化而产生裂隙，从而保温性能降低。
发明内容
为了改善目前的发泡橡胶作为室外保温管容易老化的问题，本申请提供一种保温管及其制备方法。
第一方面，本申请提供的一种保温管采用如下的技术方案：
一种保温管，由以下重量份的原料经硫化发泡制成：胶片1900-2100份、硫磺1-1.5份、氧化锌7-9份、发泡助剂55-65份。
优选的，由以下重量份的原料制成：胶片2000份、硫磺1份、氧化锌8份、发泡助剂60份。
优选的，发泡助剂由苯亚磺酸锌、橡胶促进剂PZ和橡胶促进剂DPTT组成。更优选的，苯亚磺酸锌、橡胶促进剂PZ和橡胶促进剂DPTT的质量比为(2.5-3):(45-50):(7-9)。
优选的，每份胶片的原料组成为：丁腈橡胶30-35份、聚氯乙烯树脂28-34份、超细滑石粉60-70份、偶氮发泡剂18-22份、氯化石蜡40-60份、炭黑2-8份、颗粒石蜡3-5份、聚乙二醇0.5-1.5份、防老剂0.2-1.0份、硬脂酸0.6-1.0份、抗氧剂0.1-0.5份、硬脂酸钙0.6-1.0份、硬脂酸锌0.3-0.7份。
第二方面，本申请提供的一种保温管的制备方法采用如下的技术方案：
一种保温管的制备方法，包括以下步骤：
S1、将胶片原料通过捏炼机混炼均匀，门尼粘度控制在68-73，冷却后形成胶片；
S2、利用步骤S1得到的胶片，配合硫磺、氧化锌和发泡助剂混炼均匀后，通过挤出机挤出管状胶管；
S3、对步骤S2得到的胶管进行硫化和发泡，然后冷却得到保温管。
优选的，步骤S3中，硫化和发泡区域的温度设置依次为125℃-135℃-145℃-160℃-175℃-185℃。更优选的，胶管在硫化和发泡区域的移动速度依次为10-10-10.2-11-15-18m/min。胶管经过六个温度区间，其中1-3段处于硫化阶段，胶管的体积基本不发生变化，因此牵引速度基本不变；4段处于形成泡孔的阶段，胶管体积开始膨胀，牵引速度略有增加；5-6段处于发泡剂快速分解阶段，胶管体积膨胀速度较大，因此牵引速度随之增大。
通过采用上述技术方案，丁腈橡胶具有优异的耐油性和物理机械性能，制作的保温管物理性能好。聚氯乙烯树脂物理化学性质稳定，不易被酸碱腐蚀，提高保温管的耐酸碱性能。超细滑石粉作为强化改质填充剂，发泡剂使得胶管在发泡阶段分解出气体，该气体在橡胶胶料中渗透性小，形成闭孔的气孔结构，提高保温管的隔热性能。氯化石蜡能够增加橡胶保温管的阻燃性，炭黑能够对橡胶进行补强。颗粒石蜡能够提高橡胶抗老化性和增加柔韧性，防老剂和抗老剂进一步提升保温管的抗老化性能，延长保温管的寿命。
氧化锌可以作为补强剂兼硫化剂，加快硫化速度，减少促进剂的用量，缩短硫化周期。
综上，本申请具有以下有益技术效果：
1、保温管的抗老化能力提高，延长了保温管位于良好保温性能的使用寿命；
2、保温管发泡孔的闭孔率高，阻断空气流通，减少了热交换，保温效果提升。
具体实施方式
本申请实施例公开了一种保温管的制备方法。
所有原料来源均为市售，部分原料质量规格及形态见表1。
表1部分原料质量规格及形态参数表
| 原料名称 | 型号/等级 | 形态 |
| 硫磺 | 工业级 | 片状 |
| 氧化锌 | 纯度≥99％ | 片状 |
| 超细滑石粉 | 3000目 | 粉状 |
| 炭黑 | N330 | 粉状 |
| 颗粒石蜡 | 56# | 颗粒 |
| 防老剂 | MB | 粉状 |
| 抗氧剂 | 168 | 粉状 |
一种保温管的制备方法，包括以下步骤：
S1、将胶片原料通过捏炼机混炼均匀，门尼粘度控制在70，冷却后形成胶片；
S2、利用步骤S1得到的胶片，配合硫磺、氧化锌和发泡助剂混炼均匀后，通过挤出机挤出管状胶管；
S3、对步骤S2得到的胶管进行硫化和发泡，然后冷却得到保温管。
步骤S3中，硫化和发泡区域的温度设置依次为125℃-135℃-145℃-160℃-175℃-185℃。胶管在硫化和发泡区域的移动速度依次为10-10-10.2-11-15-18m/min。
每份胶片的原料组成为：丁腈橡胶33份、聚氯乙烯树脂31份、超细滑石粉65份、偶氮发泡剂20份、氯化石蜡50份、炭黑5份、颗粒石蜡4份、聚乙二醇1份、防老剂0.6份、硬脂酸0.8份、抗氧剂0.3份、硬脂酸钙0.8份、硬脂酸锌0.5份。
发泡助剂由苯亚磺酸锌、橡胶促进剂PZ和橡胶促进剂DPTT组成。苯亚磺酸锌、橡胶促进剂PZ和橡胶促进剂DPTT的质量比为(2.5-3):(45-50):(7-9)。
胶片、硫磺、氧化锌和发泡助剂的配比见表2。
表2各实施例中原料配比表
实施例9：
一种保温管的制备方法，与实施例1的不同之处在于，每份胶片的原料组成为：丁腈橡胶33份、聚氯乙烯树脂31份、超细滑石粉65份、偶氮发泡剂20份、氯化石蜡50份、炭黑5份、颗粒石蜡4份、聚乙二醇1份、防老剂0.2份、硬脂酸0.8份、抗氧剂0.1份、硬脂酸钙0.8份、硬脂酸锌0.5份。
实施例10：
一种保温管的制备方法，与实施例1的不同之处在于，每份胶片的原料组成为：丁腈橡胶33份、聚氯乙烯树脂31份、超细滑石粉65份、偶氮发泡剂20份、氯化石蜡50份、炭黑5份、颗粒石蜡4份、聚乙二醇1份、防老剂1份、硬脂酸0.8份、抗氧剂0.5份、硬脂酸钙0.8份、硬脂酸锌0.5份。
实施例11：
一种保温管的制备方法，与实施例1的不同之处在于，每份胶片的原料组成为：丁腈橡胶30份、聚氯乙烯树脂28份、超细滑石粉60份、偶氮发泡剂18份、氯化石蜡40份、炭黑2份、颗粒石蜡3份、聚乙二醇0.5份、防老剂1份、硬脂酸0.6份、抗氧剂0.5份、硬脂酸钙0.6份、硬脂酸锌0.3份。
实施例12：
一种保温管的制备方法，与实施例1的不同之处在于，每份胶片的原料组成为：丁腈橡胶35份、聚氯乙烯树脂34份、超细滑石粉70份、偶氮发泡剂22份、氯化石蜡60份、炭黑8份、颗粒石蜡5份、聚乙二醇1.5份、防老剂1份、硬脂酸1.0份、抗氧剂0.5份、硬脂酸钙1.0份、硬脂酸锌0.7份。
对比例：
采用对比例1的制备工艺，各对比例的原料配比见表3。
表3各对比例中原料配比表
对比例11：
一种保温管的制备方法，与实施例1的不同之处在于，门尼粘度控制在80。
对实施例1-12和对比例1-11制作的保温管取样进行性能检测，检测依据如下：GB/T 17794-2008柔性泡沫橡塑绝热制品。每个实施例和对比例取样三个，有效检测结果取平均值，得到的检测结果汇总见表4。
表4各实施例和对比例制作的保温管性能检测表
以上均为本申请的较佳实施例，并非依此限制本申请的保护范围，故：凡依本申请的结构、形状、原理所做的等效变化，均应涵盖于本申请的保护范围之内。
Claims (10)
1.一种保温管，其特征在于，由以下重量份的原料经硫化发泡制成：胶片1900-2100份、硫磺1-1.5份、氧化锌7-9份、发泡助剂55-65份。
2.根据权利要求1所述的保温管，其特征在于：由以下重量份的原料制成：胶片2000份、硫磺1份、氧化锌8份、发泡助剂60份。
3.根据权利要求1或2所述的保温管，其特征在于：发泡助剂由苯亚磺酸锌、橡胶促进剂PZ和橡胶促进剂DPTT组成。
4.根据权利要求3所述的保温管，其特征在于：苯亚磺酸锌、橡胶促进剂PZ和橡胶促进剂DPTT的质量比为(2.5-3):(45-50):
(7-9)。
5.根据权利要求1-4任一所述的保温管，其特征在于：每份胶片的原料组成为：丁腈橡胶30-35份、聚氯乙烯树脂28-34份、超细滑石粉60-70份、偶氮发泡剂18-22份、氯化石蜡40-60份、炭黑2-8份、颗粒石蜡3-5份、聚乙二醇0.5-1.5份、防老剂0.2-1.0份、硬脂酸0.6-1.0份、抗氧剂0.1-0.5份、硬脂酸钙0.6-1.0份、硬脂酸锌0.3-0.7份。
6.根据权利要求1-5任一所述的保温管，其特征在于：保温管的闭孔率≥98％。
7.如权利要求1-6任一所述的保温管的制备方法，其特征在于，包括以下步骤：
S1、将胶片原料通过捏炼机混炼均匀，门尼粘度控制在68-73，冷却后形成胶片；
S2、利用步骤S1得到的胶片，配合硫磺、氧化锌和发泡助剂混炼均匀后，通过挤出机挤出管状胶管；
S3、对步骤S2得到的胶管进行硫化和发泡，然后冷却得到保温管。
8.根据权利要求7所述的保温管的制备方法，其特征在于：步骤S3中，硫化和发泡区域的温度设置依次为125℃-135℃-145℃-160℃-175℃-185℃。
9.根据权利要求8所述的保温管的制备方法，其特征在于：胶管在硫化和发泡区域的移动速度依次为10-10-10.2-11-15-18m/min。
10.根据权利要求7-9任一所述的保温管的制备方法，其特征在于：还包括步骤S4印字和定长裁断。
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