“Antimony-free” is often treated as a compliance checkbox. In laser welding and adhesive-assisted systems, it is also a process constraint: removing antimony-containing pathways can change energy coupling, thermal confinement, and drift tolerance. This article explains the engineering reasons antimony-free designs often narrow the process window—and how to manage the trade-offs without turning compliance into yield loss.

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Thermal runaway is one of the most misunderstood failure modes in laser welding adhesives. It often appears suddenly: a process that seems stable at low power collapses into overheating, deformation, or charring with only minor parameter changes. This article explains the physical mechanisms behind thermal runaway, why adhesive-assisted systems are particularly susceptible, and how engineers can recognize and prevent it.

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“Absorption is high” is often mistaken as proof that low-power laser welding will succeed. In real production, many joints still fail because absorption does not guarantee interface activation, stable heat confinement, or tolerance to drift. This article explains why low-power laser welding can fail even when the system absorbs laser energy well, and provides a decision framework to diagnose and prevent these failures.

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Carbon black is often treated as the default “laser absorber” for polymer laser welding. In practice, it frequently creates new problems: unstable process windows, cosmetic defects, contamination risk, and incompatibility with compliance-sensitive applications. This article explains the failure mechanisms behind carbon black in laser welding and provides engineering selection logic for when it should not be used.

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