Expanded polyethylene (aka EPE foam) refers to foams made from polyethylene. Typically it is made from expanded pellets ('EPE bead') made with use of a blowing agent, followed by expansion into a mold in a steam chest - the process is similar to that used to make expanded polystyrene foam.
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EPE foams are low density, semi-rigid, closed cell foam that are generally somewhere in stiffness/compliance between Expanded polystyrene and Polyurethane. Production of EPE foams is similar to that of expanded polystyrene, but starting with PE beads. Typical densities are 29 to 120 kg/m3 (49 to 202 lb/cu yd) with the lower figure being common. Densities as low as 14 kg/m3 (24 lb/cu yd) can be produced.
Base polymer for EPE foams range from Low-density polyethylene (LDPE) to High-density polyethylene (HDPE).
Expanded polyethylene copolymers (EPC) are also known - such as 50:50 (weight) materials with polystyrene. Though other properties are intermediate between the two bases, toughness for the copolymer exceeds either, with good tensile and puncture resistance. It is particularly applicable for re-usable products.
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EPE foams were first manufactured in the s.
Production of the PE beads is usually by extrusion, followed by chopping, producing a 'pellet'. Autoclave expansion is the most common route the bead foam. Butane or pentane is often used as a blowing agent (before CFCs may have been used). Depending on the specific process uses the beads may be cross-linked either by electron beam irradiation (see Electron beam processing), or by the addition of a chemical agent such as dicumyl peroxide.
An alternate route (JSP Process) to the beads uses carbon dioxide as a blowing agent which is impregnated into the pellets in an autoclave at a temperature close to the plastic's crystalline melting point. The pellets are foamed by "flashing" into the (lower pressure) atmosphere to expand.
Finally molding is done by steam chest compression molding; usually the low pressure variant of the process is used, though the high pressure variant may be used for HDPE based EPE foams.
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Polyethylene bead foams (including) EPE can be used to replace both polystyrene foam, and both rigid and flexible polyurethane. Uses include cushioning applications, and impact absorption applications including packaging.
Consumption of polyethylene for PE foam was estimated at 114x106 kg in . The majority was used for non-crosslinked foams, but crosslinked PE foams represented a significant (~ one third) fraction of demand. Use in protective packaging represented the largest use sector for such foams.
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Product packaging or packaging is an important thing that all types of product business owners must consider. Because packaging is the only solution that can protect your products as safely as possible. Moreover, it also helps create a good experience for consumers. At present, EPE material or cushioning foam is a suitable choice. To help protect your products safely until they reach consumers. So, what is EPE? Today, Flexi-Pack will explain it to everyone in detail, from the type of foam to its application for businesses.
EPE material is thermoplastic resin or a type of plastic. That is popular in the plastic industry and is very important to the plastic industry. with a wide range of physical and chemical properties whether it is highly flexible It is resistant to various factors such as high heat resistance, moisture resistant, oils and chemicals. The texture of the EPE material is soft but gives strength and durability at the same time, and also gives a lighter weight than other types of plastic materials. Therefore, it is suitable for application in various industries, such as foam for product protection, making EPE foam pipes for mechanics and making EPE foam sheets.
In the production process of EPE material or EPE foam, the production process is the same as other types of foam. Starting with the main raw material called 'Polyethylene' goes through a high heat melting process. and produce into small plastic pellets in a machine that uses water to cool and form into small pellets or EPE material. Hot and high pressure in order to melt it into EPE foam that is shaped according to the manufacturer's shape. Can do both trimming shaping Including various additive coatings to achieve the desired properties. Most of which choose to add substances that help prevent static electricity for cushioning products in the category of electronic devices. The resulting foam sheet will have the ability to prevent shock as well. Ready to use for various businesses
One of the positive properties of EPE material is that it can be recycled multiple times. This means that this type of material can be processed over and over again. Through the process of melting with high heat, the use of EPE as a material helps reduce the amount of plastic waste. But there are limitations to recycling. Currently, there are very few providers who process or recycle EPE mechanically or use clean processes. As a result, EPE is largely disposed of in landfills rather than recycled.
Due to its superior flexibility than other types of foam, EPE foam can be used to absorb impact during transportation. Makes the product inside not easily damaged
Another advantage of flexibility is the recovery of EPE foam when it is compressed or impacted. The foam can be used for a long time without having to worry about the product being packaged inside being damaged.
EPE foam has high chemical resistance and corrosion resistance. Especially substances that have acidic and alkaline effects. It also has the property of not allowing moisture to pass through, so no water is absorbed.
EPE foam has excellent anti-static properties. This makes it easy for dust and small particles to cling to the surface. But if you want to use it with electronic equipment products Manufacturers can add special additives to it for greater resistance.
It is known that foam must have low thermal conductivity, making EPE Foam Insulation a material that has good thermal insulation capabilities. Does not cause the product inside to become hot.
EPE is a pure material that does not contain any toxic substances. that cause harm to humans Therefore can be used for a variety of uses. It also helps inhibit the growth of fungi.
It is a lightweight material. Can be used for various applications flexibly and can be molded into any desired shape. You can choose the color you want, including white. pink and black to meet your needs as much as possible
Used as a material to protect against shock of products such as glassware, porcelain, scientific instruments, electronic equipment, jewelry, etc. Used as heat insulation in heat-saving bags. and certain types of electrical appliances such as air conditioners and heater Used as a sealant and waterproofing material for construction work. It is a component of many types of life jackets and flotation devices.
Good product packaging is something that industrial business operators should not neglect because it's the only way to make your products as valuable and available to consumers as possible. Therefore, investing in cushioning materials like EPE is a cost-effective solution based on the impressions of buyers. Moreover, EPE can be used as the main raw material for many other types of products. For anyone looking for a manufacturer of cushioning materials, Flexi-Pack is ready to provide various solutions with you completely and definitely meets the needs of your business.
Are you interested in learning more about PE Foam Recycling Machine? Contact us today to secure an expert consultation!