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Cheap ADHESIVE FOR AUTOMOTIVE INTERIOR DECORATION Failure cause analysis

Release time：

2021-09-16 16:03

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The main places where Cheap ADHESIVE FOR AUTOMOTIVE INTERIOR DECORATION is used are: car roofs, floor mats, seats, dashboards, door trims, trunk luggage racks and spare tire covers. There are many types of substrates involved, such as artificial leather, polyurethane foam, non-woven fabrics, glass fiber, ABS, PP, etc. Different parts, different substrates, and different bonding processes have different types of adhesives.
Cheap ADHESIVE FOR AUTOMOTIVE INTERIOR DECORATION Common bonding failure phenomena:
 
1. Partial bulging phenomenon
2. Open edge phenomenon
3. Abnormal decrease in bonding strength
 
Analysis of Failure Causes of Cheap ADHESIVE FOR AUTOMOTIVE INTERIOR DECORATION:
 
(1) Low surface energy substrates such as PP, PE, etc. have not been treated, resulting in weak bonding and decreased strength;
(2) After the glue is added to the curing agent, its use time is exceeded;
(3) When the air permeability of the substrate is not good, the glue starts to be bonded before it is completely dried, which causes the internal water vapor to be unable to release, and the sample bulges after being subjected to high temperature;
(4) The temperature, pressure, and pressing time cannot be reached, resulting in a decrease in bonding strength and a bounce of the edge;
(5) The heat-activated bonding is not performed in time according to the specified time, so that after a long time, the film cannot be heat-activated or the heat-activated is insufficient, so that the bonding strength decreases and abnormalities occur;

Cheap ADHESIVE FOR AUTOMOTIVE INTERIOR DECORATION failure solution:
 
(1) Operate strictly in accordance with the requirements, whether it is a mold or manual coating, the actual temperature, pressure, and pressing time of the film shall not be lower than the process parameters required by the adhesive;
(2) For low surface energy substrates such as PP and PE, surface treatment should be carried out in advance, such as corona, flame treatment, spray primer, etc.;
(3) The glue with curing agent must be used up within the specified time;
(4) After the glue is sprayed, wait for the moisture to completely volatilize, and then heat-activate the bonding after the glue film is dry to avoid the partial release of moisture;
 

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