Your current location: Home > News
Causes and treatment measures of sealant
Class:News Date:2012-5-23 10:13:02
Sealant is a guide with the sealing surface shape and deformation, not easy to flow, there is a certain bond of the sealing material. Is used to fill the configuration space, in order to play the role of sealing adhesive. With anti leakage, waterproof, anti vibration and noise, insulation and other functions. Is widely used in construction, transportation, electronic instruments and components and parts of the seal. The sealant are different, methods of operation strictly, unhealthy competition and market, resulting in the sealant of poor sealing effect, then Xiaobian to analyze the phenomenon and reason of the sealant is not qualified.
1, phenomenon
(1) according to the design requirements of weatherproof sealant using neutral structure silicone sealant or adapt to the.
(2) to replace structural sealant or two mixed weatherproof sealant.
(3) cannot provide by has the special quality testing agencies issued the structural silicone sealant compatibility test report, only manufacturers self inspection report.
(4) structural silicone sealant, weatherproof sealant without durable life guarantee, some even more than the period of use.
2, reason analysis
(1) the shoddy, inferior to generation and use of fake and shoddy products.
(2) procurement staff performance of structural sealants, weather resistant sealant does not understand, management personnel lack the necessary regulatory knowledge and engineering caused confusion and misuse.
(3) to reduce the cost of consciousness, not in accordance with the provisions of the procedures, content commissioned by the test.
3, control measures
(1) the glass is fixed to the metal frame and the glass under the wind load, seismic, gravity and temperature changes expected environmental forces through the glue to transfer to a metal frame and the adhesive must be neutral structure silicone sealant. Strength, ductility, adhesion properties and mechanical properties is the important consideration target, its performance should be consistent with current national standard "architectural structural silicone sealant, GB16776) regulations.
(2) weatherability sealant mainly silicone sealant, neoprene sealant and poly sulfur sealant, among them poor compatibility, and should not be mixed or with the use of. Weather resistant sealant is mainly used for the external construction of the seal, resistant to atmospheric changes, ultraviolet resistance, aging resistance is the main consideration.
(3) with a curtain wall engineering should use the same brand of one component or two-component silicone structural sealant, use the same brand of silicone weatherproof sealant supporting the use of; not with structural sealant instead of weatherability sealant, but not with overdue structural sealant downgrade for weather sealing glue.
(4) prior to the purchase of silicone sealant compatibility test and performance test of the contact material carefully. If no such report shall supervise the contractor to immediately commissioned detection mechanism with the qualification of the special test (compatible experiment of this project related materials should be used, such as glass, aluminum, double-sided adhesive strips), eligible and rear can use.
(5) structural silicone sealants and silicone weatherproof sealant, since the approach, until the curtain wall construction end, must ensure the use within the valid time range.
(6) light color, color, transparent structural silicone sealant anti ultraviolet performance is poor, only suitable for indoor engineering; outdoor should generally be used black.
(7) the storage of plastic environment, should meet the requirements of temperature and humidity.