The glue coating process has gained widespread recognition in China following the increasing popularity of German Vitu Cabinets over recent years. This innovative technique employs a two-component polyurethane reactive process, yet many users still harbor misconceptions regarding its requirements and precautions. This article aims to clarify these misunderstandings, hoping to assist businesses and operators utilizing this technology.
One common misconception about the glue coating process is that it functions similarly to single-sided adhesive foam strips, which might fall off over time due to their reliance on physical bonding. These foam strips adhere to surfaces through unreacted glue, relying solely on their own viscosity—a method known as physical bonding. However, the viscosity of such adhesives fluctuates significantly under varying environmental conditions. For instance, colder weather reduces viscosity, while hotter temperatures diminish it further, leading to eventual detachment. Conversely, glue strips produced via the glue coating process achieve chemical bonding through a two-component reaction, creating an irreversible chemical bond. This ensures durability regardless of temperature or duration of use, except in cases of external interference.
Dalian Huagong Innovation Technology Co., Ltd., one of the early domestic enterprises exposed to glue coating technology, offers insights from Mr. Han, whose focus lies in pre- and post-sales services. He emphasizes maintaining high-quality equipment while showcasing the company's expertise. Currently, the company's equipment has been exported globally, with continuous product development. We invite inquiries and discussions.
Another misunderstanding involves the belief that the glue coating process lacks versatility due to varying workpiece materials. Surfaces with higher surface tension tend to bond better with glue, resulting in more robust adhesive strips. Conversely, materials with lower surface tension exhibit weaker adhesion, potentially causing detachment. To address this, primers can be applied beforehand (typically on stainless steel) or a flame activation method can be used (commonly for plastics and coated surfaces).
A third misunderstanding revolves around the influence of environmental factors on the glue coating process. Since this is a chemical reaction-based process, temperature plays a crucial role. Higher temperatures accelerate the reaction, potentially thickening the glue strip and increasing bubble formation within it, especially with domestic glue, which may compromise adhesion and smoothness. Lower temperatures could hinder the reaction entirely, leaving hardened or less elastic strips even post-reaction. Similarly, low humidity might harden the glue strips. These issues highlight the importance of ensuring optimal machine performance.
Finally, there's a misconception suggesting that glue strip quality depends solely on equipment rather than the glue itself. While equipment quality is critical, glue selection should not be overlooked. High-quality glue facilitates smoother operations, provides consistent application, and yields glossy, elastic strips that retain their properties over time. Additionally, it minimizes maintenance needs and raw material wastage. Thus, choosing reliable, high-performance glue is recommended.
In summary, the glue coating process offers numerous advantages over traditional methods, provided users understand its nuances and select appropriate materials and conditions. Proper implementation ensures durable, efficient results, making it a valuable asset for modern manufacturing.
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