HDPE Fabrication and Machining

HDPE Fabrication and Machining

Ehren-Haus offers HDPE fabrication services as well as other polyethylene machining services using the right techniques to fabricate high performance products for use across industries. We are registered with FDA for contract medical device manufacturing and medical relabeling and repackaging.

What is HDPE (High Density Poly Ethylene)?

Polyethylene is one of the most widely used and versatile types of plastic. HDPE or high density polyethylene is a widely used thermoplastic formulation of polyolefin, and is generated from ethylene monomer. It is a lightweight plastic with excellent properties which is why it is used in a range of industrial applications. Welding and machining HDPE is quite easy and convenient as much as its rigidity and stiffness.

Learn more about the properties of HDPE

What Sets Ehren-Haus Apart?

At Ehren-Haus, we focus on quality and hence have significantly invested in research, technology and resources to get the best product outputs. Our state-of-the-art facility, our experienced and innovative team, and our capabilities enable us to meet even the most complex requirements with ease. We have developed expertise in customization as we do not believe in a one-size-fits-all approach. So, we come up with design and plastic fabrication techniques on a case to case basis. As for HDPE, we regularly fabricate and machine FDA-certified and USDA-certified products for use in food and medical industries.

What is Our Process?

Our experts work closely with clients to understand their requirements and finalize the design. We accept these files in CAD, IGS, and DXF formats. Once we receive these files, our experts analyze them thoroughly, and recommend changes if required. The prototype building begins only after discussing with the client and seeking their approval.


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    Custom HDPE Parts and Components Fabrication Capabilities

    We regularly perform the following process to build polypropylene parts and components.

    CNC Machining

    As a part of plastic parts machining services, we perform drilling, cutting, tapping, forming, and so on. This automated process ensures perfection and precision irrespective of the volume of parts with the same shape and dimensions.

    HDPE Bending

    Line bending is conventional techniques, with which we offer the part precision required in certain applications. HDPE though rigid is also bendable and can be easily formed or line bended. We apply bending with the help of heaters or ovens.

    HDPE Thermoforming

    Since, HDPE is a heat resistant thermoplastic, it can be thermoformed to make various parts and products. In this technique, an HDPE sheet is heated at a certain temperature and it takes the shape of the mold, and solidifies once cooled. The excess HDPE material which comes out of the mold is trimmed off.

    HDPE Vacuum Forming

    In this process, HDPE is heated and pressed to a 3D mold. The heating makes it pliable. Vacuum forming is about removing the air between the sheet and the mold to create a complete vacuum. Various types of plastics can be combined for this technique, depending upon their gage range. This technique enables us to make parts as small as an inch and as big as 50 inches. This technique is widely used to make dome shaped protective covers, chutes, and so on.

    HDPE Properties

    These are some properties of HDPE which make it a widely used thermoplastic across industries today.

    Thermal Properties

    HDPE has a melting point of 130 degrees Celsius. Its coefficient of thermal expansion ranges between 12 and 18 cm °C. Its heat deflection temperature ranges from 76.5 to 78 degrees Celsius.

    HDPE Density

    The density of HDPE, depending upon the grade ranges between 0.955 and 0.961 g mL-1.

    Machining Properties

    HDPE, as mentioned, can be quite easily machined. It is rigid and has a high tensile strength. It is a high-density, crystalline thermoplastic, and hence the probability of developing cracks and deformation is very low. Even if it does, it can be fixed through annealing. It can be machined at tight tolerances, and offers fine surface finishes.

    HDPE Grades We Work With

    We fabricate and form all grades of HDPE – sheet, rods and tubes – from 1/32 – 3-4”. HDPE is commonly used as a marine board, cutting and body boards - Can be fabricated into trays and carriers. There are two primary grades of HDPE - grades 300 and 500. These numbers indicate the material density. The higher the number the denser is the thermoplastic, or in other words, it has a higher molecular weight. HDPE is available in a variety of brand names such as HiTec, Playboard, Polystone, and so on. Both these grades are usually available in black or white colors. Aside from the primary grades- 300 and 500, HDPE is also graded as HDPE-approved, marine grade HDPE, and HDPE pipe grade.

    Advantages of Using HDPE Parts

    HDPE is available in sheet or rod form and has several beneficial properties. Here are some of them:

    High Strength

    The rod and sheet forms are especially useful for applications which require high strength and stiffness. It has a close to perfect strength to density ratio.

    Moisture Resistance

    HDPE has a low moisture absorption rate, and hence can be used for parts and products which are exposed to moisture.

    Chemical Resistance

    It is resistant to corrosion, heat, abrasion, chemicals, and so on, and hence finds usage in chemical tubes and pipes, wastewater tanks, and so on.


    HDPE is non-toxic and hence finds applications in food and medical industries.

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