【尼龙制品】的调湿处理

1、吸湿性 Moisture absorption

刚顶出的注塑制品几乎不含水分。这点对于塑件以后的应用很重要，因为FRIANYL?-尼龙只在水分含量为大约1.5 – 2.5 %时，各项机械性能达到要求。因此，注塑制品都需要调湿。

Injection mouldings that are ejected out of the mould have almost no moisture content. This is very important to recognize this for future applications for the moulding. FRIANYL?-polyamides only

attain their optimum mechanical properties after moisture equilibrium has been reached at about 1.5-2.5%. For this reason the injection mouldings should always be conditioned.

吸湿性取决于结晶度。非结晶区吸湿更快，这就是为什么强调调整工艺参数，务必使结晶均匀的原因。

Moisture absorption depends on the crystallinity. Amorphous areas absorb moisture faster. That's why one should aim for an even crystallinity, which is achieved by the processing parameters.

吸湿速度由FRIANYL?-牌号，环境湿度，以及塑件的壁厚共同决定。

The rate of moisture absorption is dependent on the FRIANYL?-types, the environmental conditions,and the wall thickness of the mouldings.

请参见后面的调湿表。

See attached conditioning table

尼龙制品http://www.jxxggs.com/应该注意到，塑件的水分含量每增加1%，塑件的体积会增加0.05-0.2%。对于要求尺寸精确的塑件，这点特别要注意。

It has to be noticed, that with a 1% increase in water content in the moulding it's volume increases by about 0.05-0.2%. This is of special significance for mouldings with tight dimensional tolerances.

2、饱和吸水率 Water absorption-saturated

FRIANYL?-尼龙的饱和吸水率取决于具体牌号，一般在7-9%之间。壁厚和水温决定吸水速度。

The saturated water absorption of FRIANYL?-polyamides depends mainly on the material type and ranges as a rule is between 7-9%. The speed with which this happens depends, too on the wall thickness and the water temperature.

参见下述调湿表。

See attached conditioning table.

NILIT(屹立）FRIANYL? 尼龙的调湿表

Conditioning table for FRIANYL? Polyamides

① ISO – 1110 规定的NK 23/50 条件下的标准调湿条件。

备注：在壁厚一栏，没加下划线的为小时数，加了下划线的为天数。仅供参考。

According to ISO-1110 for the conditioning of standard test bodies to the standard moisture content in NK 23/50 Conditioning time in hours/days for the adjustment of the water content equilibrium in normal humid air when stored for flat parts (plates) in FRIANYL?.

水渗透的过程符合物理学上的吸水规律，这就是说，靠自然气候本身调湿是天然和最经济的办法，但是在室温和通常气候下，吸湿过程是非常缓慢的。

The water delivery process is subject to the same physical rules as the water absorption. This means that for practical purposes climate- and weather variations can be neglected because water absorption and - delivery do at least at room temperature and normal climate happen very slowly.

和上述1一样，吸水时也要考虑相应的体积变化。

Increase of volume has to be taken into consideration see point 1 also concerning the water absorption.

3、测试水分含量  Determination of the moisture and water content

对塑件制造商来说，简单称量调湿前后尼龙塑件重量的增加来测算水分含量，就已经够了。要更精确测量的话，可以使用红外干燥法，和实验室常用的Karl-Fischer-Titration(KT-Titration)方法。

For the manufacturer it is sufficient to determine the moisture content in PA parts by establishing the increase in weight simply by weighing the parts before and after conditioning. Further more precise measurement methods are infrared drying and Karl-Fischer-Titration (KT-Titration), which is the usual method in labs.

4、调湿Conditioning

调湿的目的是在注塑厂赋予塑件日后使用所需要的性能。

The purpose of conditioning is to impart in the moulding whilst still in the moulding company the properties that the part will require later.

FRIANYL?-尼龙在水分含量1.5 – 2.5 %时达到其特定的性能。因为调湿过程，随不同工艺，要花费时间和成本。客户需要针对特定应用，在调湿之前要考虑是不是有必要。

FRIANYL?-polyamides attain their specific property values with a moisture content of 1.5-2.5%.Because the conditioning process is, depending upon the chosen procedure, expensive and timeconsuming,one should first consider whether a particular case really requires conditioning.

如果决定要调湿，以下有几个不同的选择，可根据情况参考：

Should one decide in favour of conditioning then there are several options available which can be selected for different reasons:

塑件封入PE 包装袋，添加2-5% 的水分Packing in PE-bags with the addition of 2-5% Water

确定室温下和通常环境湿度下的储存时间

Defined storage time at room temperature and normal environment moisture

在注塑好之后，直接置入温水中Storage in warm water directly at the injection moulding machine

使用市售的专门调湿设备With special conditioning devices, which are available on the market

建造调湿室，内设湿热蒸汽Purpose built conditioning chambers with steam or tropical climate

塑件调湿的一个先决条件是要明确需要的水分含量，然后确定调湿时间。A prerequisite for controlled conditioning of mouldings is the supervision of the moisture content andestablishing the conditioning time.