Many friends engaged in packaging, color boxes, and injection molding trays often encounter a problem: Despite being called "white base white", why do some work well while others tend to deform, peel off, or have printed patterns that are too prominent? In fact, there are clear criteria for selecting suitable white base white for injection molding.
First, look at tensile strength and hardness. Injection molding packaging requires a supporting structure. If the paperboard is too soft, it will collapse; if it is too hard, it is difficult to process. High-quality injection molding white base white has moderate hardness, good elasticity, and is less likely to bend or deform after being made into trays and liners. It does not deform even after long-term storage.
Second, look at whiteness and surface flatness. The smoother the surface, the better the printing effect and the easier it is to adhere to the injection molding film. If the surface is rough or has spots, it not only affects the appearance but also easily causes the injection molding to be uneven.
Third, look at uniformity of thickness. This is particularly important for mass production. Paperboard with uniform thickness is stable when running on the machine, cuts smoothly, and does not have uneven thickness or size deviations.
Fourth, look at **adhesion and interlayer strength**. This is especially important for large-scale production. Uniformly thick paperboard is stable when running on the machine, cuts smoothly, and does not have uneven thickness or size deviations. It is less likely to delaminate or wrinkle, resulting in a higher yield.
Fifth, look at customization capability. Regular factories generally support customization of weight, thickness, and size, and can flexibly adjust according to your product structure, rather than having only fixed specifications.
Finally, also look at supply stability. Especially for those engaged in foreign trade and long-term orders, stable materials are more important than temporary low prices. Avoid frequent material changes to prevent quality fluctuations.
In summary: When choosing injection molding white base white, there is no need to blindly pursue the most expensive option. Focus on looking at the four points: tensile strength, surface, uniformity, and injection molding compatibility. Combined with a stable factory supply, you can basically select a truly useful and cost-effective material.