Metal stickers are widely used in electronic products, home appliances, machinery and civilian products. The production of metal stickers is mainly based on copper, iron, aluminum, zinc alloy, titanium, stainless steel and other raw materials. Recently, customers have asked why metal stickers will fall after using hot melt adhesives? As long as you know the sticker production process, you can see if it is a hot melt adhesive problem?
- Improper use of hot press
The hot-pressed label is pressed and heated on a hot-press machine through a thermally conductive copper mold. If the imbalance between the copper mold and the product results in high sides and low sides, some stickers are not evenly heated. Therefore, a verticality needs to be adjusted between the copper mold and the sticker.
- The hot pressing temperature is insufficient and the hot pressing time is insufficient
De standaard smelttemperatuur van hete smeltlijm is 70-90 graden en de hete persentijd wordt geselecteerd op basis van de kenmerken van het product. Als de temperatuur te hoog is, zal de hotmeltlijm verdampen en zal de hoeveelheid lijm afnemen. Als gevolg hiervan kan het label niet aan het productoppervlak blijven. Als de temperatuur te laag is, smelt de heet smeltlijm niet of smelt deze niet volledig. Dit probleem manifesteert zich meestal als het product later valt.
- Gebruik inferieure hot smelt lijm
In order to save costs, many sticker manufacturers use inferior hot-melt glue. The reason why most metal stickers drop off is related to inferior glue. Especially with nickel plating and stainless steel stickers. Therefore, when ordering hot-pressed stickers, major businesses should choose a strong sticker manufacturer, such as Shenzhen JTT Metal Precision Co.,Ltd。
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