Let’s face it, since the invention of plastics, plastics have made our lives easier. A lot of our household goods are made from plastic materials, from our milk jugs and spoons to the plastic water bottles that are sold everywhere. However, unlike other materials that goods are made from, such as wood, plastics take hundreds of years to break down, leaving us with a plastic overload.
KW Plastics is the world’s largest plastics recycler. We buy plastic and then turn that plastic into post-consumer resins that we then sell to plastic manufacturers to reuse in their plastic products. We are helping reduce the amount of plastic in the world through our scrap plastic recycling process. In this blog post, we’ll take a look at blow molding, which is the process that makes most of the plastic bottles in the world. Contact us for your recycled plastic pellet needs!
WHAT IS BLOW MOLDING?
Blow molding has its roots in traditional glass blowing and glass making. Glassmakers would superheat glass to its melting point and then blow air into tubes that would make glass bottles. This is the essence of blow molding. A plastic tube is superheated to its melting point and then put into a mold to create plastic bottles. Blow molding has been around since the 1800s, but it wasn’t until the 1930s that the technology existed to take blow molding mainstream. Let’s take a closer look at the steps in the blow molding process.
STEPS IN BLOW MOLDING PROCESS
- Injection. Plastic is melted and formed into a parison, or a preform, depending on what type of blow molding you are doing. The parison is a piece of plastic shaped into a tube with a hole in the bottom, which allows the air to escape.
- Blowing. The parison is then held in a mold where air is blown into it and the plastic expands to the shape of the mold.
- Ejection. The plastic then cools, hardens, and is finished. The plastic is ejected by the machine and then repeated.
As you can see, the actual process of blow molding is very simple and very repeatable, allowing this process to be easily replicated and automated. The beauty of this process is that almost any type of polymer or resin can be used in this process, making it easy to recycle plastic perpetually. In fact, recycled plastic pellets, such as those that KW Plastics produces and sells, are one of the most common plastics used in the blow molding process.
Blow molding can be made into many shapes besides plastic bottles. Common uses of blow molding of plastics include:
- Containers used for bulk materials
- Household items and lawn and garden items
- Medical supplies
- Parts for the construction trades
- Automotive parts
- Appliance components, including fenders, seating, consoles, and automotive ductwork
- Stadium seating
- And so much more!
HOW KW PLASTICS RECYCLES PLASTIC
KW Plastics is a plastic recycling company that buys plastic scraps and then turns that plastic scrap into HDPE, MDPE, and PP post-consumer resins, which are fancy words for recycled plastic. We do this mainly in the form of plastic resin pellets for commercial use. KW Plastics focuses on customer service and delivering a high quality product for your use. We are proud that we are helping supply sustainable packaging products, as exhibited by our 100% one-gallon paint cans produced by our sister company, KW Container. When you buy plastic resin pellets from us, you can rest assured you are not only helping our environment, but you are also getting the best recycled plastics on the market today. Contact us today to get started!