Fixing polypropylene plastic can be challenging due to its low surface energy, which makes it difficult for adhesives to bond with. However, it can be done successfully using the right techniques. First, cleaning the surface thoroughly with isopropyl alcohol to remove any grease or dirt is crucial. Next, using a plastic welding method with a specially designed heat gun and rod made of polypropylene is highly effective for repairing cracks or breaks. This method essentially melts the polypropylene, allowing it to fuse back together as it cools. For smaller repairs, adhesive solutions designed specifically for polypropylene can be used, though they might not be as durable as welding. Always wear appropriate safety gear when working with heat tools or chemicals.

A corky and yarn setup is a popular rig among anglers, especially those targeting steelhead or salmon in rivers. The setup involves a corky, which is a small, foam floatation device, and yarn, usually brightly colored, tied to the hook. The corky adds buoyancy to the setup, allowing the hook and yarn to drift naturally with the current, while the yarn adds visibility and mimics the appearance of bait. This combination is effective in attracting fish, as it presents an easy target that looks like an injured or disoriented prey. To set it up, simply thread the fishing line through the corky, tie on a hook, and attach a small tuft of yarn to the hook. Adjustments can be made based on water clarity and flow, as well as fish preference. Anglers often experiment with different colors and sizes of corkies and yarn to find the most effective combination for their specific fishing conditions.

The chemical name of PVC is Polyvinyl Chloride. It is a synthetic polymer made by polymerizing the monomer vinyl chloride, which has the chemical formula CH2=CHCl. PVC is a versatile plastic that can be made rigid or flexible depending on the application, ranging from pipes and window frames to medical devices and clothing. Its wide usage is attributed to its chemical stability, high durability, and low cost. However, the production and disposal of PVC raise environmental concerns due to the release of toxic chlorinated compounds. Efforts are ongoing to recycle PVC waste and develop more sustainable alternatives.