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怎么甄别PVC缠绕管的质量?怎么选择好的PVC缠绕管?

作者: laobingguandao    来源:http://www.laobingguandao.com  时间:2020-09-01    人气:
PVC缠绕管一般具有以下特性:
Generally, PVC wound pipe has the following characteristics:
1、 抗压性好,有弹性,耐冲击。
1. Good compression resistance, elasticity and impact resistance.
2、 重量轻、工程成本相对较低。
2. It is light in weight and relatively low in engineering cost.
3、 环保耐腐蚀。
3. Environmental protection and corrosion resistance.
4、 管壁平滑、摩擦系数小,杂物不易附着驻留。
4. The tube wall is smooth, the friction coefficient is small, and the foreign matters are not easy to adhere to.
5、 耐低温、使用年限长。
5. Low temperature resistance, long service life.
通常我们怎么辨别差的PVC缠绕管呢?品质低的PVc缠绕管一般可以从以下几个角度去辨别;
How do we usually distinguish the poor PVC winding pipe? The low quality PVC winding pipe can be identified from the following aspects;
01  韧性,可以用拉伸的方法去查看。好的PVC管其断裂伸长率曲线应具备显著塑性变形,延伸率较大,而差的pvc管材时常表現为脆性断裂,延伸率低而易开裂。
01 toughness, which can be checked by stretching. The PVC pipe is often brittle and has a good elongation curve, while the PVC pipe is easy to crack due to its low elongation.

02  冲击性表现,按GB/T5836.1-92规范检验,采用落锤冲击试验,一次合格率仅为不够50%,很多企业产品竟然10次撞击,全都开裂。
02 impact performance, according to GB / t5836.1-92 specification inspection, using drop hammer impact test, the first pass rate is only less than 50%, many enterprise products even 10 times impact, all cracked.
03: 变软溫度低,受热易于形变。主要表现在实验性能指标上,即是维卡软化温度较低(低于79)。
03: soft, low temperature, easy to deform when heated. The main performance index is that the Vicat softening temperature is lower (lower than 79).
一些小厂商为提升软化温度,简单地在配料时增加填充料量,这样做着实可提升变软温度,但却使pvc管材其他特性,尤为是耐冲击性,延伸率、柔韧性大大降低,因而要提升软化温度,而不减低或好少减低其他特性,就应在助剂选取、原材料配制、生产工艺流程、及生产制造机械设备上抓细,不能草率对付。
In order to increase the softening temperature, some small manufacturers simply increase the amount of filling material in the process of batching, which can really increase the softening temperature, but it will greatly reduce other characteristics of PVC pipes, especially impact resistance, elongation and flexibility. Therefore, in order to increase the softening temperature without reducing or reducing other characteristics, it is necessary to select additives, prepare raw materials, process flow, etc And manufacturing machinery and equipment to grasp the fine, can not be dealt with hastily.

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