Delamination (coating peeling or layer separation) is one of the most serious defects in silicone-coated gloves. Unlike surface issues such as bubbles or pinholes, delamination means the silicone layer loses adhesion completely from the fabric, leading to partial or full peeling during use.
This problem directly affects product durability, safety performance, and customer satisfaction, especially in anti-slip and protective glove applications.
What Is Delamination in Silicone Glove Coating?
Delamination refers to the separation of the silicone layer from the glove fabric. It may appear as edge lifting, partial peeling, or complete detachment of the coating layer.
In severe cases, the silicone layer can be peeled off like a film, indicating a complete failure of interfacial bonding.
Why Does Silicone Coating on Gloves Delaminate?
One of the main causes is poor surface preparation of the fabric. If the glove surface contains oil, silicone residues, dust, or softening agents, the silicone cannot form a strong chemical or mechanical bond with the fiber. This weak interface becomes the starting point of peeling.
Another key factor is insufficient adhesion system or missing primer treatment. Many textile materials, especially polyester and nylon, have low surface energy. Without proper surface activation or primer, silicone adhesion remains weak, making the coating prone to separation under stress.
Incorrect curing conditions can also lead to delamination. If the curing temperature is too low or the time is insufficient, the silicone may not fully crosslink and bond with the fabric. On the other hand, excessive curing can damage the interface structure and reduce adhesion strength.
Mechanical stress during use is another important factor. Gloves are constantly stretched, bent, and twisted. If the adhesion strength between silicone and fabric is lower than the applied mechanical stress, gradual separation will occur over time.
In some cases, incompatibility between silicone formulation and fabric type also plays a role. Different silicone systems (addition or condensation cure) may interact differently with textile fibers, and improper selection can lead to weak bonding.
How Delamination Appears in Different Coating Structures
In dot coating, delamination usually starts at individual dots, which gradually fall off under repeated friction.
In line coating, peeling often begins along the edges of the lines and spreads along the coating path.
In grid coating, separation typically occurs at stress concentration points, especially at intersections.
In full coating, delamination may appear as large-area peeling, where the entire layer detaches from the fabric.
How to Prevent Silicone Coating Delamination
Preventing delamination requires strong control over surface preparation, adhesion chemistry, and curing conditions.
Proper fabric pre-treatment is essential. Removing oil, dust, and chemical residues ensures a clean surface for bonding.
For low-surface-energy fabrics, using a suitable primer or surface activation treatment (such as plasma or corona treatment) significantly improves adhesion strength.
Curing must be carefully controlled to ensure full crosslinking without damaging the interface. Both under-curing and over-curing can reduce adhesion performance.
Finally, selecting a silicone system compatible with the target fabric ensures long-term bonding stability under mechanical stress.
Conclusion
Delamination in silicone glove coating is primarily caused by weak interfacial bonding, poor surface preparation, improper curing, and material incompatibility.
By improving surface treatment, optimizing curing conditions, and ensuring proper silicone formulation selection, manufacturers can greatly enhance coating adhesion and prevent peeling failures during use.