Choosing a suitable blow moulding materials for your machine is a critical challenge. You have to comprehensively consider many factors. Such as: cost, hardness, plasticity, coloring degree and whether it meets the product requirement that you need. Detailed content following maybe help you. Don’t worry! Let’s first get a general idea of what is blow moulding. What is blow moulding? Blow moulding is a rapidly developing plastic processing method. The tubular plastic billet produced by extrusion or injection moulding of thermoplastic resin and place it in the opposite open die while it is hot (or heated to the softening state). Then compressed air is injected into the billet immediately after the closure of the mould, so that the plastic billet is blown up and attached to the inner wall of the mould, and various blow moulding products are obtained by cooling and demoulding. Next. Be attention! Subject is coming up! The most commonly used blow moulding materials is HDPE. Most milk bottles and industrial containers are all use this material. Other polyolefins are often used by blow moulding. For example: PP, PET, PC, LDPE, PVC and so on. Let’s take a look! HDPE HDPE is the first largest plastic in the world, and is also the most common use as blow moulding materials. It has widely used at various products including：the container of shampoo and engine oil, cooler, oil tank, water tank,and industrial tank. It’s translucent, high plasticity and easy coloring. It has considered as one of the most safety plastic as well. Yankang currently used HDPE and HMWHDPE as blow moulding materials to produce various industrial containers. Satisfaction with customer feedback is high. If you also produce industrial containers, we strongly recommend you use HDPE and HMWHDPE as raw materials. Do not use any other grade instead blow grade. This will reduce the product life time.Small Machine+Product PP Polypropylene is a extremely popular moulding resin. It’s a fine candidate of high temperature application since its rigidity and lower density. Like HDPE, it’s translucent, easy coloring. But it has higher hardness and lower density, friendly moulding. PP is commonly used at high temperature application. Such as dishwasher pipe and medical components that need autoclaving. PET PET is a polyester. It has commonly used as blow moulding materials by injection blow moulding into transparent container products. Actually, the largest market for PET is soft drink and water bottles. Extrusion blow moulding is not very common because the resin need a lot of drying, but there are also some. PC PC is a strong and transparent materials. The toughness of this transparent material makes it very suitable for products ranging from glasses to bullet-proof glass for jet cockpits. Besides, it commonly used for product 5 gallons water containers. This sturdy material casts well in the basic shape. But it’s hard to grind and need to give serious assessment to complex shape. LDPE LDPE is used at softer product. It needs high level of stress crack resistance and flexibility. It’s easy shaped and colored, translucent. Generally,the higher content of EVA, the softer moulded products. Common applications is squeeze bottles, traffic channelization and ship fender. The most commonly used is blow-moulded plastic bag film. Polyvinyl Chloride (PVC) Although PVC is the third largest plastics in the world, the use of cadmium and lead as stabilizers, the release of hydrochloric acid (HCl) during processing and the release of residual vinyl chloride monomers (most of which have been reduced) after moulding have been strictly examined. Polyvinyl chloride is translucent, in hard and soft forms. Soft resins are usually used as blow moulding materials. Common applications include soft medical components, bellows and traffic cones. Special treatment equipment is recommended to prevent hydrochloric acid corrosion. Thermoplastic Elastomers (TPE) TPES as a substitute for natural rubber in moulding parts. This material is not transparent, can colored(commonly is black). TPES is commonly used at vehicle suspension cover, intake pipe, bellows and grip surface. It is well formed after drying and usually reprocessed. Acrylonitrile Butadiene Styrene (ABS) ABS is a relatively rigid plastics and used at football helmet for injection moulding. ABS as blow moulding materials is usually opaque and used at electronic enclosure and small appliances. ABS is well formed after drying, but its toughness makes grinding difficult. However, the chemical resistance of parts made from ABS is not as good as that of polyethylene or polypropylene, so parts in contact with chemicals must be carefully used. Polyphenylene Oxide (PPO) PPO is an opaque resin. It requires drying and has a limited drawdown capacity during moulding. This restricts designers to PPO parts with generous blow ratios or flat shapes, such as panels and desktops. Molded parts are stiff and relatively strong. Like ABS. Nylon/Polyamides (PA) Nylon melts quickly, so it’s more commonly used in injection moulding. The resins used for extrusion blow moulding are typically variants of nylon 6, nylon 4-6, nylon 6-6, and nylon 11. Nylon is a reasonably priced translucent material that has decent chemical resistance and performs well in high heat environments. It’s often used to make tubes and reservoirs in automotive engine compartments. As you can see, there are many kinds of blow moulding materials. It even dazzles you. The above is just a reference. Each material has its own advantages, disadvantages and characteristics. Although each material has its own advantages, we still have to base on our own production needs. We have to choose different raw materials according to different product specifications. All right. The blog is ending here. Thanks for Reading! Sincerely Hope to Help You.