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Related matters to be paid attention to in the production process of hot melt butyl sealant

2021-03-18 10:16

First, the influence of environmental temperature change to butyl hot melting sealant: the change of environmental temperature has a certain impact on the use of butyl sealant, and those indicators have an impact?What are its specific manifestations?Specific share is as follows: Needle entry: needle entry will become smaller when the ambient temperature is low, high temperature will become larger (low temperature hard, high temperature soft). Shear strength: Also affected with temperature change (decay with temperature rise). Needle entry degree, shear strength will have an impact on the environmental temperature change, butyl sealant with low needle entry degree (except low quality glue), butyl sealant is generally hard, shear strength is relatively large, not easy to slide, fall piece.When the construction temperature is below 5 degrees, the sealant temperature or construction environment temperature should be appropriately increased, increase the plate pressure time and pressure, otherwise, butyl sealant is not easy to press open, sealing and shear strength will be affected.However, excessive heating can cause butyl sealant drawing, so heating to adjust the right amount. When the construction environment temperature is greater than 30 degrees, butyl sealant will become soft and the shear strength will be reduced. Appropriate attention should be paid to the weight and bearing capacity of the glass, so as to avoid overweight and slide, resulting in production safety accidents.


Two, the influence of ambient temperature and humidity on the shear strength. Summer, high temperature and humidity season, the humidity in the air is larger, glass through cleaning machine, due to the high humidity in the air, the glass surface will have a layer of water vapor condensation, the condensation on the glass surface water vapor will affect the bonding between butyl sealant and glass, cause the probability of slide will be very high, therefore, summer high temperature high humidity season operation, must pay attention to take corresponding measures to ensure the safety of the piece, don't be used to go away.This invisible condensation degree of water vapor, it cannot be measured by conventional habits.


Three, the effect of the center of gravity offset on the shear force Center of gravity offset: the so-called center of gravity offset, refers to the size of the insulating glass configuration, fixed adsorption surface like lever weight bearing capacity, with the increasing of glass configuration, three glass two cavity, four glass three cavity, composite fire hollow, glue hollow glass and so on to butyl glue on the contact shear force requirement is very high.Suggestion: take the heaviest piece of glass as the suction cup adsorption part.Reduce the risk of center of gravity offset and be responsible for production safety.


Four, the impact of the lower sheet operation on the shear force Lower operation: for more than 200 kg of glass, must pay attention to the lower glass tilt, butyl glue shear force detection environment temperature is 25 degrees, falling tension is under vertical state, if the lower suspended outside tilt, it is not only the shear force and the existence of glass plane tear tension, slide, falling higher chance.Large plate glass remember to take corresponding protection measures to ensure safety, appropriate tilt into the plate, so that the safety factor is higher.