Tue. Aug 9th, 2022

Plastic injection molding is considered a versatile and most popular manufacturing technique. There are many advantages and uses of the plastic injection method that include precision, the flexibility of designs, the ability to work with various plastic resins, cost-effectiveness, and accuracy of products. That’s why technology reigns supreme in the world of plastics. However, the number of plastic polymers invented so far is numerous. As there are many options of resins available in the market it may get difficult for you or for anyone to get the right choice of resins or to make the decision of which ones to get?

Qualities of resins:

Each plastic resin has its own unique properties. It is important to consider the defining qualities of each to choose the right one for your product. Another very important thing is that the properties of resins are enhanced when the fillers such as calcium, silica, alumina are used. The following are the key properties that need to be considered for each plastic resin before it is made:
1. Hardness
2. Flexibility
3. Weight
4. Cost

Types of resins:

There are multiple types of resins that are used in the process of plastic injection molding but there are only a few that are best and help give you the best result. We are going to discuss a few of them here so that you can get the perfect results in your production. With hundreds of existing and emerging resins on the market, selecting a particular plastic resin for plastic injection molding can often be overwhelming. The process may seem really difficult but that is not the case. Each plastic resin has its own unique properties, advantages, and disadvantages. Some of the frequently used reins have been listed for you to get familiar with:

1. ABS:

The most famous resin of injection molding is ABS. ABS has an application in many kinds of industries since it has versatile properties. It offers toughness, impact on the resistance, durability, and heat resistance. ABS combines acrylonitrile’s and styrene’s polymers toughness together with the strength of polybutadiene rubber. ABS provides a colorful, glossy effect with a good quality of surface finishing and is easily molded. ABS is a plastic polymer whose melting point is not defined till now. ABS plastics find their use in many applications as they have found them in computer parts, sports, housing equipment, and musical instruments, medical equipment, toys, helmets, electronics, automobiles, etc.
ABS does not provide you with chemical resistance as good as other resins and that is why it can’t be utilized in electrical insulation etc.

2. HIPS:

High Impact Polystyrene (HIPS) is a resin that provides injection molding with excellent effect on the resistance, excellent machinability, excellent aesthetic properties, dimensional stability, and customizable surfaces. HIPS can be easily printed, pasted, bonded, and embellished. It is also very economical. It is particularly designed for usage in applications of graphic arts, which is best suited for the use of high-speed digital printing equipment. The uses of HIPS include hot and cold beverages, audio-visuals, high-speed digital printing, bicycles, toys, and gasoline tanks, etc.

3. Polyamide:

Polyamide or nylon is used in many fields. Superior properties like chemical and electrical resistance, toughness, wear resistance, etc. are seen in this type of plastic resin. Rugged environments are resisted with the help of nylon polymers that might bring out high impact, chemical contact, or abrasion. Polyamide or nylon plastic resin is extensively used in the production of medical parts, the automotive industry, sports gear, and other industrial equipment.

4. PMMA:

Polymethyl methacrylate, which also goes by the name of acrylic or PMMA, is a largely used plastic resin, having applications as a substitute of glass is required. The versatile properties make it a plastic manufacturers’ choice for the procedure of plastic injection. Usually, acrylic is available easily and is a low-cost type of plastic resin. Acrylic is a plastic that is used in the formation of windows, picture frames, car screen, beauty products, paints, eye lenses, etc.

5. Thermoplastic polyurethane:

Thermoplastic polyurethane’s soft and elastic properties make it the best choice for products that need the consistency of rubber-like elasticity. Moreover, the high tensile strength, its ability to withstand high temperatures make it a worthy option for applications, for example, cable insulation, sports gear, electrical tools, etc.


Selecting the right material to manufacture a part using plastic injection molding technology is essential for optimum performance. It is not the sole purpose to do this. This saves a good amount of time as well as money spent during the manufacturing process.
Opportunities and molding plastic designs have a wide range because of the resins. The true understanding of resins in their respective field is vital.

By Admin

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