Below is a cost comparison between Nylon, ABS and Polycarbonate (PC) for a complex injection moulded part. There is also a comparison of how the price and lead time change according to the number of parts ordered.

If you’re looking to kickstart a new project in Linear Low-Density Polyethylene injection molding, partnering with a reliable and top-tier collaborator is indispensable.

In order to obtain high quality LLDPE plastic products, it is essential to strictly follow the injection molding conditions. The following are important conditions in the LLDPE injection molding process:

Injection molding is the primary application market for LLDPE. Due to the high strength of the LLDPE molding , it’s feasible to use high-flow resins, which enhances production efficiency and realizes the thin-walling of LLDPE products, thus making it widely applicable across various domains.

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Lastly, LLDPE plastic can withstand low temperatures, so it’s not prone to becoming brittle, ensuring safety in use and maintaining consistent performance.

Request your free injection moulding quote today and one of our engineers will personally review your project within 24 hours. They will then help fine-tune your project to make sure you get the best possible price and lead time for your injection moulding project.

In this article Get It Made simulated the production for two different parts, a very simple small part, and a more complex larger part. You can see how prices vary between different common injection moulding materials and part quantities moulded.

The superior toughness and low-temperature impact strength of this resin make it ideally suited for items such as waste bins, toys, and refrigeration utensils.

Below is a cost comparison between Nylon, ABS and Polycarbonate (PC) for a simple injection moulded part. The table/graph also compares how the number of parts ordered affects the price and lead time.

Linear LLDPE has a high melt viscosity, low flow length ratio, lower flowability than LDPE and HDPE, and thin-walled products may lack glue, therefore, the gate and runner are relatively large.

With many years of experience, sheet metal parts can be a great low-cost option for certain high and low-volume applications.

Injection moulding is a manufacturing process often used to produce high volumes of plastic parts. This manufacturing process starts by creating and machining a mould with precision to form the part’s features. Then molten plastic resin is injected into the metal mould cavity. The plastic moulded parts subsequently cool and are ejected from the mould cavity. If you want to know more about the injection moulding process, read our Injection Moulding Guide.

Aluminium extrusion is ideal for both single prototypes and large-scale production, offering bespoke, high-standard, consistent cross-sectional profiles.

Linear low density polyethylene is non-toxic, tasteless, odorless milky white particles with a density of 0.918~0.935g/cm3.

Whether it’s PE injection molding, LDPEinjection molding, HDPE modling, or LLDPE injection molding, FOWMOULD will promptly provide you with expert Design for Manufacture (DFM) feedback and offer complimentary quotation services and technical guidance.

Our 3D printing solutions cater to personalised needs with a diverse range of materials and colour options, perfect for intricate plastic components and small batches.

Optimised for mass production of plastic items, our services in Plastic Injection Moulding are backed by deep expertise and industry-leading knowledge.

Additionally, rigidity is intrinsically related to density. Thus, the lower the density, the less rigid the material will be, rendering it slightly softer.

Because of its short melt stress relaxation time,injection molded LLDPE  have minimal residual stresses, resulting in reduced shrinkage and warpage.

Generally control the mold temperature in the range of 50-80 ℃, in order to reduce the injection cycle time at the same time and improve the appearance of the quality of the parts.

For Nylon, going from quantity of 500x to 5000x has a 88% total cost per part saving for a simple injection moulded part. For volumes around 500x and below, it can often be cheaper to CNC machine or 3D Print the parts depending on the design. This is because the high tooling costs are spread over a smaller number of parts, making each part more expensive. Going from 5000x to 50,000x sees an additional cost saving of 9%. This demonstrates how increasing the part quantity significantly reduces part cost for smaller volume orders. However, as the order quantity increases, the reduction in unit price becomes less but still significant.

As the most produced variety among polyethylene resins, Linear Low-Density Polyethylene (LLDPE) stands out with its exceptional comprehensive properties and extensive applicability. In recent years, the market demand for LLDPE has skyrocketed, leading to a growing interest in the LLDPE injection molding process.

Compared to LDPE material, it has a higher softening temperature and melting point, boasting advantages such as greater strength, good toughness, increased rigidity, excellent heat and cold resistance.

Linear low-density polyethylene (abbreviated LLDPE), usually produced by the copolymerization of ethylene and advanced a-olefins such as butene, hexene or octene at much lower temperatures and pressures.

It is also resistant to acids, alkalis, and organic solvents, making it widely used in industries such as agriculture, pharmaceuticals, sanitation, and everyday household products.

Secondly, LLDPE plastic exhibits outstanding extensibility and significant yield strength, making it easy to mold with superior physical and mechanical properties.

FOWMOULD, with over 40 years of specialization in the injection molding industry, boasts a professional design and manufacturing team. Their profound understanding of the characteristics of each plastic material, combined with an extensive reservoir of knowledge and hands-on experience, continues to fuel FOWMOULD’s relentless advancement.

Ready to see how much your part costs to manufacture? Request a free Injection moulding quote today, and one of our engineers will review your project within 24 hours.

Choose our CNC Turning services for circular cross sections. We also offer Turn & Mill capabilities for more complex turned parts.

Additionally, it exhibits superior resistance to environmental stress cracking, impressive impact strength, and tear resistance.

Because LLDPE material is an olefin plastic, it does not absorb water, when producing, no drying is required, but for product quality, it can be dried at a temperature of 60℃ for 1hr to discharge floating water.

If you’re eager to delve deeper into this process, please continue reading. FOWMOULD will introduce you to the properties and applications of LLDPE, as well as how it is transformed into various products through injection molding technology.

The data shows a slightly different trend for a larger, more complex injection moulded part than the simple/smaller one analysed above. There is a saving of 79% going from 500x to 5000x in nylon and a further 12% going up to 50,000x. This shows that there are still substantial cost savings in manufacturing into the high thousands for larger, more complex parts. The price for 500x is comparable to 3D Printing as the tooling cost is a relatively smaller proportion of the unit cost than the small/simple injection moulded part.

If you want to know more about materials options for your injection moulding project, read our article about choosing the right Injection Moulding material.

Firstly, both LDPE and LLDPE possess excellent rheological or melt flow properties. However, LLDPE has lesser shear sensitivity due to its narrow molecular weight distribution and shorter branches.

It is essential that the design of the injection moulded parts are carefully reviewed before production. Removing unnecessary features from the parts will make the tooling easier to machine. Read our Injection Moulding Design Guide to optimise your parts and get a better price for your project.Â

The data again indicates that ABS is the most cost-effective to manufacture in out of the three materials, while polycarbonate is the most expensive. With an increase in quantity from 500x to 50,000x, the lead time only increases by a few days. This is primarily because most of the lead time in an injection moulding project is manufacturing the mould and sampling. Once the mould successfully produces parts to the desired specifications, the parts can be produced rapidly.

Its application in pipe linings and wire and cable coatings is smaller, but here LLDPE’s high burst strength and resistance to environmental stress cracking fulfill the necessary requirements.

Tooling is often a key part of the economics in plastic injection moulding, this is because it is a large up-front investment. And this cost needs to be amortised into expected part volume, over a number of years. If injection moulding isn't suitable, it is very possible 3D Printing or CNC Machining could be a better option. Depending on the parts' features, the machining of a complex mould will require more time and expense, increasing the upfront costs of the project. This is the main reason why injection moulding is mainly used for high volumes.

Therefore, it is necessary to increase the power of the injection molding machine or add other low molecular weight plastics to increase its fluidity.

Furthermore, FOWMOULD offers a one-stop injection molding service, encompassing everything from product design and mold manufacturing to the actual injection molding process. Equipped with the most advanced injection molding machinery in their physical factory, FOWMOULD’s experts constantly monitor the molding procedure, ensuring timely feedback on production details to clients.

Injection molding, the general use of temperature 200 ℃ – 260 ℃, taking into account its apparent viscosity, poor fluidity, a separate LLDPE is difficult to injection molding.

The LLDPE copolymerization process produces LLDPE polymers with a narrower molecular weight distribution than typical LDPE, and a linear structure that gives them different rheological properties.

When comparing the three materials, the data shows that ABS is the cheapest material to manufacture with, and polycarbonate is the most expensive. The lead time only increases by a few days going from 500x to 50,000x. This is because the bulk of the lead time for an injection moulding project is manufacturing the mould and sampling. Once the mould produces parts to specification, part production is very fast.

In general, injection moulding tooling can cost from £2k to £100k. Costs for moulded parts can range from a few pence to a hundreds of pounds each.

To ensure that the LLDPE material fully fills the mold and to reduce the generation of defects, the injection pressure is usually set at 50-160 MPa.

In modern industrial production and daily life, many plastic products’ processing and production cannot do without LLDPE plastics. The following advantages are reasons why LLDPE plastic injection molding has been successful across various sectors.

In melt extension, LLDPE typically has a lower viscosity at various strain rates, meaning it won’t strain-harden like LDPE during stretching.

Furthermore, LLDPE’s high resistance to environmental stress cracking qualifies it for injection molding caps that come into contact with oily foods, rotomolded waste containers, fuel tanks, and chemical storage tanks.

ACIS®, Autodesk Inventor®, CATIA® V5,Creo™ Parametric, IGES, Parasolid®, Pro/ENGINEER®,Siemens PLM Software’s NX™, SolidEdge®, SolidWorks®, STEP

However, once you have the moulding tool, the plastic moulded parts will have a very low unit cost. And the tooling is usually CNC machined from a high quality steel, allowing more than one production run using the same tool, so it will last many years.