You might have an overview of the different types of plastic caps. What is the most common type? Why use it? How can you make it work for you? Read on to learn about its benefits. Then, choose the right product for your product! Here are some examples:
These caps are usually white. They seal and keep your product airtight. They feature EPDM gaskets and 3/4" NPT microporous vents. They can also be mounted on plug holes with coarse threads. Thus, you can get plastic caps that suit your packaging needs. Some advantages of using plastic caps are listed below:
The top of the plastic caps consists of two parts - the top (11) and the skirt (12). The top has a shape locking surface (16) on the inner surface. The shape of this form-locking surface prevents the lid from unscrewing. The skirt has a cylindrical outer surface that is smooth and curved in a single plane. Its peripheral lower edge (17) defines a relatively thin uniform wall. The outer metal sheath (20) rolls over the skirt (17).
Plastic caps are mechanical devices that are attached to the ends of containers by threads or lugs. Caps must meet various requirements: cost-effectiveness, effective sealing, and compatibility with the contents. Plastic caps must also be easily opened by the consumer and reclosed. Additionally, screw caps must comply with all product regulations, including requirements for child-resistant packaging. Many screw caps have tamper-evident bands.
Another type of plastic caps have a circular array of external grooves that extend around the circumference. This structure helps reduce differential cooling and internal stress. The grooves are usually 25-30 degrees around the circumference and narrow enough at the mouth to prevent inward deformation. Gate well 14 and recess 18 are also narrow. Composite covers may have several layers of material and may be injection molded or molded.