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教您如何正确辨别无机真空绝热板
来源:/ 日期:2018-09-21 发布人:admin

一、辨芯材。

First, identify core materials.

不是所有的材料都可以用来作为真空绝热板的芯材,目前在国际上用于建筑领域的真空绝热板选用的芯材一般为前两种——气相二氧化硅、沉淀法二氧化硅,因为选用这两种产品作为芯材的真空绝热板性能最稳定,使用寿命可以达到50年以上。

Not all materials can be used as the core material of the vacuum insulation board. At present, the core materials used in the vacuum insulation board in the international construction field are generally the first two kinds - vapor phase silicon dioxide and precipitation method silicon dioxide. For more than 50 years.

另外开孔聚氨酯、开孔聚苯乙烯泡沫及玻璃纤维棉在制成真空绝热板时,芯材会有很大程度的压缩,用于建筑外墙时一旦真空失效,芯材会发生膨胀,墙面会起鼓开裂,存在一定的安全隐患。一些厂家为控制芯材的膨胀率,在芯材里加入一定的胶进行胶合处理,使芯材变的密实,膨胀率降低,但是这样处理过的芯材,便很难再进行抽真空,芯材在真空绝热板中仅是一个支撑的作用,导热系数当然也达不到所宣传的效果。

A级防火保温材料

In addition, when openings polyurethane, open cell polystyrene foam and glass fiber cotton are made into vacuum insulation panels, the core material will be compressed to a large extent. When used in building exterior walls, once the vacuum fails, the core material will expand, and the wall will crack and crack. In order to control the expansion rate of the core material, some factories add certain glue to the core material for gluing treatment, so that the core material becomes compact and the expansion rate decreases. But it is difficult to vacuum the treated core material again. The core material is only a supporting role in the vacuum insulation board, and the thermal conductivity of the core material can not reach the propaganda of course. Effect.

二、辨高阻气膜

Two. Distinguish the high resistivity film.

真空绝热板的高阻气膜是有金属薄膜与其他几种高分子膜通过热合技术制成的,膜的好坏关系到整个真空绝热板的使用寿命,好的阻气膜水蒸气渗透率和氧气渗透率都是极低的,一般的复合膜保证不了真空绝热板的使用寿命。膜的好坏用肉眼观察是不能轻易分辨出来的,有些厂家为了降低成本进行价格竞争,减少薄膜的层数和铝箔的厚度,这种阻气膜制成的真空绝热板使用寿命会非常短,1~2年之内真空就会完全丧失掉。

The high resistance gas film of vacuum insulation board is made of metal film and several other high polymer membranes by thermal bonding technology. The quality of the membrane is related to the service life of the whole vacuum insulation board. The good resistance gas film water vapor permeability and oxygen permeability are extremely low. The general composite membrane can not guarantee the service life of the vacuum insulation board. The quality of the film can not be easily distinguished by naked eye observation. In order to reduce the cost of competition and reduce the number of layers of the film and the thickness of aluminum foil, the vacuum insulation board made of the film will have a very short service life and the vacuum will be completely lost within 1-2 years.


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