Page 21 - 《橡塑技术与装备》英文版2025年12月

THEORY AND RESEARCH

(45 N) can cause microcracks in the material due to excessive (see the slope relationship between glue solution viscosity and
stretching, as shown in Figure 1(b), affecting the mechanical mean thickness in the left main effect plot of mean thickness
strength of the bonded sheet. in Figure 2, and the slope relationship between glue solution
Vehicle speed has a certain impact on both the mean viscosity and mean uniformity of thickness in the right main
thickness and thickness uniformity (see the slope relationship effect plot of mean uniformity of thickness in Figure 2). Too
between vehicle speed and mean thickness in the main effect high a viscosity leads to poor fluidity of the glue solution,
plot of mean thickness on the left in Figure 2, and the slope resulting in a significantly thicker material with uneven
relationship between vehicle speed and mean thickness thickness. As the viscosity decreases, the fluidity of the glue
uniformity in the main effect plot of mean thickness uniformity solution increases, and the uniformity of thickness is improved
on the right in Figure 2). Too fast a vehicle speed may cause to some extent.
the adhesive to cure before it has fully leveled, resulting 2.3 The influence of process parameters on
in surface defects; too slow a speed may lead to excessive the viscosity of adhesive sheet materials
penetration of the adhesive, causing localized thickening of the In general, the glue solution is the factor that has the
material. Optimizing the vehicle speed can balance production greatest impact on the viscosity of materials, especially as
efficiency and surface quality. When the vehicle speed is low changes in the viscosity of the glue solution can affect the
(5 m/min), the adhesive has sufficient time to level, but too viscosity and reaction activity of the resin, thereby influencing
low a speed can cause the adhesive to dry and cure locally, the viscosity of the material. Through data analysis of the DOE
which is not conducive to surface flatness. As the vehicle speed experimental design, it is found that tension and vehicle speed
increases, the leveling and curing speeds of the adhesive reach also have an impact on the viscosity of materials (see the slope
a balance, resulting in better surface flatness. When the vehicle relationship between tension, vehicle speed, and viscosity
speed is too high, the adhesive has insufficient time to level, mean values in the left viscosity main effect plot of Figure 3).
leading to local "orange peel cracking" phenomena, as shown It is worth noting that there is also a certain interaction between
in Figure 1(c). tension and vehicle speed (see the extension lines of tension
The viscosity of the glue solution has a certain impact and vehicle speed intersecting in the upper left position of the
on both the mean thickness and the uniformity of thickness viscosity interaction plot in Figure 3).

Figure 3 Main effect and interaction plots of process parameters on viscosity

The experimental results indicate that, compared to is low, the surface viscosity of the material after impregnation
tension, the influence of vehicle speed on material viscosity is is relatively high. As the viscosity of the glue solution further
slightly more significant. When the vehicle speed is low, it is increases, pre-curing phenomena appear on the resin surface,
easy to cause excessive resin penetration, thereby increasing and local cracking becomes more pronounced, as shown in
the material viscosity. When the viscosity of the glue solution Figure 1(d). This is not conducive to subsequent processing

Vol.51
年，2025
·15·
2025 第 51 卷 ·15·