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防水透气膜围护系统


  实践证明,无论采用何种铺设形式,都难以保证围护系统的密闭。细石混凝土的开裂难以避免,压型钢板、瓦片的搭接处难以严密。通过这些非密闭的孔隙,气流及水气即可侵入围护系统,从而对建筑的节能性、耐久性及舒适性产生严重影响,而防水透气膜围护系统能够避免这种严重影响。以下是防水透气膜气密性、水密性及透气性与建筑的节能性、耐久性、舒适性密切相关的几点。

  Practice has proved that no matter what kind of laying, it is difficult to ensure the closure of the enclosure system. Fine stone concrete cracking is difficult to avoid, pressure type steel plate, tile overlap difficult to close. Through these non closed pores, air and water vapor can invade surrounding system, so as to produce building durability and comfort and energy saving, seriously affected, and waterproof breathable membrane enclosure system can avoid the serious effect. The following are waterproof breathable film tightness, water tightness and vapor permeability and building energy efficiency, durability, comfort are closely related to a few points.

  1、建筑的节能性

  1, building energy efficiency

  雨水及水气侵入建筑围护系统将降低保温层的有效热阻值气流侵入建筑围护系统内部形成对流循环,也将降低保温层性能增加制暖设备保证室内温度适宜,从而增加了建筑能耗。

  The rain and moisture intrusion of building envelope system will reduce the effective value of the insulation resistance layer of air into the building envelope system is formed inside the convective circulation, will also reduce the insulation performance and increases the heating equipment to ensure the indoor temperature, thereby increasing the energy consumption of buildings.

  2、建筑的耐久性

  2, the durability of the building

  雨水及水气侵入建筑围护系统,侵蚀建筑材料,加速建筑材料的老化,进而影响建筑的耐久性。

  Rain and water vapor intrusion into the building envelope system, erosion of building materials, accelerate the aging of building materials, thereby affecting the durability of the building.

  3、建筑舒适性

  3, building comfort

  气流的侵入,对室内的热工舒适性产生不利影响。污染物、放射物通过气流进入室内,从而对室内空气质量造成影响。进入建筑围护结构内部的水气被长期密封在结构内,从而导致潮气的产生及霉菌的形成,进而降低居住的舒适性。

  Because the air temperature is high, the water vapor can contain more saturated at higher temperature; and the air temperature is low, the lower the saturation temperature, when the temperature drops below the saturation temperature, water vapor will be the state of water droplets condensed and separated from the air, which has undergone condensation. When the water vapor accumulates and condenses in the insulation layer, it will reduce the thermal efficiency of the insulation layer, and cause the steam problems in the inner wall.

  Because of the existence of indoor and outdoor temperature, so the condensation phenomenon is difficult to avoid. Due to the traditi

  4. 结露现象

  4 condensation phenomenon

  由于空气温度越高,能够包含的水蒸气就越多,即饱和温度越高;反之空气温度越低,饱和温度越低,当气温下降并低于饱和温度时,水蒸气将以水滴的状态凝结并从空气中分离出来,这就发生了结露现象。当水气在保温层积聚、凝结,将降低保温层热功效,并引发外墙内侧发霉等潮气问题。

  Because the air temperature is high, the water vapor can contain more saturated at higher temperature; and the air temperature is low, the lower the saturation temperature, when the temperature drops below the saturation temperature, water vapor will be the state of water droplets condensed and separated from the air, which has undergone condensation. When the water vapor accumulates and condenses in the insulation layer, it will reduce the thermal efficiency of the insulation layer, and cause the steam problems in the inner wall.

  由于室内外温差的存在,因此结露现象难以避免。由于传统防水卷材的密闭性特点(如PE膜,沥青防水卷材等),使水气无法自由排出,从而导致霉菌的形成。

  Because of the existence of indoor and outdoor temperature, so the condensation phenomenon is difficult to avoid. Due to the traditional waterproofing membrane sealing characteristics (such as PE membrane, asphalt waterproof membrane, etc.), so that water vapor can not be free discharge, resulting in mold formation.


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