There is a delicate and close balance between the unwinding force of the adhesive tape and the viscosity of the adhesive layer, which has a crucial impact on the actual performance of the adhesive tape.
First, too small an unwinding force may indicate insufficient adhesive layer viscosity. When the unwinding force is too weak, the adhesive layer may lack sufficient adhesion to maintain its stability on the tape base before the adhesive tape is used. For example, in some industrial production environments, if the unwinding force of the adhesive tape is too small, the adhesive tape may slip and wrinkle during storage or transportation, resulting in the inability to effectively combine with the adherend in the subsequent pasting operation, unable to play the due bonding function, and affecting the packaging or fixing effect of the product.
Secondly, too large an unwinding force will bring many inconveniences to use. If the unwinding force exceeds the reasonable range, the user will face great difficulties in tearing the adhesive tape, and may need to use additional tools, which will not only reduce work efficiency, but also may cause the adhesive tape to be pulled, deformed or even broken during the unwinding process. Moreover, excessive unwinding force may mean that the adhesive layer is too sticky, which may cause excessive adhesion during pasting. For example, in some occasions where high pasting accuracy is required, such as pasting electronic components, pasting errors may occur due to difficulty in precise positioning, or when the adhesive tape needs to be removed later, the surface of the adherend may be damaged, leaving glue stains that are difficult to clean.
Furthermore, to achieve a balance between the two, it is necessary to regulate from many aspects. In the production process of adhesive tape, the formulation design of glue plays a key role. By adjusting the composition ratio of glue, such as the content of tackifying resin and rubber, the unwinding force can be optimized while ensuring that the adhesive layer has appropriate viscosity. In addition, the manufacturing process of adhesive tape, such as glue coating thickness and drying conditions, will also affect the balance between unwinding force and viscosity. For example, precise control of glue coating thickness can ensure that the adhesive layer provides sufficient viscosity while not causing excessive unwinding force due to excessive thickness.
The balance between the unwinding force of adhesive tape and the viscosity of the adhesive layer is an important indicator for measuring the quality and applicability of adhesive tape. Adhesive tape manufacturers need to conduct in-depth research on the intrinsic connection between the two, and optimize the formula and process to produce adhesive tape products with moderate unwinding force and good adhesion to meet the usage needs of different industries and scenarios, and improve the competitiveness of adhesive tape in the market and user satisfaction.
