Category Archives: Application

RECYCLING EPS (STYROFOAM) – HOW IS EXPANDED POLYSTYRENE RECYCLED?

Polystyrene foam in its common form are the take-out plastic cups from fast-food chains or egg cartons and so on that we often use. In fact all manufacturing companies rely on this material to serve their packaging requirements.
Reliance on EPS is already an environmental issue because lots of its by-product has already reached landfills. When EPS is left in landfills, the material resides indefinitely and never decomposes nor disintegrates. Thus, recycling is necessary even when this may not be a practical solution.

Hasswell Technologies - EPS densifier
How to recycle Styrofoam (polystyrene) is not as easy as it seems. EPS or plastic #6 is actually made from styrene which is a by product of petroleum. It is very light since only 5% is styrene while 95% compose of air that makes it very effective as an insulation and packaging material. Recycling EPS follows a very delicate process.
Recycle. Reuse. Reduce! You can never do wrong with a regular dose of cool recycling ideas for all that junk.
1. All waste Styrofoam or polystyrene foam materials are taken out of collection centers and shipped to the recycling facility. All contaminants are removed; this includes paper, food crumbs and even tapes.
2. Sorting takes place to separate clean materials from dirty or soiled waste. Materials that do not pass the clean sorting process are sent for washing.
3. Next is the grinder that turns the waste EPS into fluff. Other EPS material that is not yet clean are rewashed and dried.

EPS Grinder

EPS Grinder

4. The is then fed into the heat and friction machinery to remove all the air.
5. The melted material enters the die with small openings and together with pressure the fluff is extruded and results in polystyrene strands.
6. The EPS strands are then cooled with water and then chopped into pellets.
7. The resulting pellets are then shipped to manufacturers to be used as raw material for the production of almost everything from toys to sun visors to motorcycle helmet padding and even as building insulation. The use of recycled Styrofoam raw material is practically endless.

Can Polystyrene Foam Be Recycled?

Yes, but there is a lot of debate as to whether recycling isn’t actually more detrimental to the environment than landfilling this substance.

Polystyrene
Recycling polystyrene is not a closed-loop process. What this means is that we don’t recycle styrofoam into other styrofoam products. Instead it is recycled into other plastics, most of which are not themselves recyclable. In the process  even more resources are expended and more pollutants released.

Furthermore, most recyclers don’t want to handle polystyrene. It’s lightweight and takes up a lot of space. The markets for recycled polystyrene have been unstable and processors often can’t get a good market price for the material.

If you do wish to recycle polystyrene, your best bet will be EPS densifier. Harden and Hasswell can offer different kinds of EPS densifiers. EPS densifier densifies waste polystyrene packaging blocks, EPS fish boxes, and EPS board to absolute minimum, up to 50 to 1 size reduction. With this significant volume reduction, the densified polystyrene will take up much less storage space, and it makes logs that f cilitate transport and handling. This means a big cost saving and higher residual value of scraps.

EPS Densifier

EPS Densifier

EPS and EPS Recycling: the Extraordinary Product Solution

Expanded polystyrene is a simple product. The manufacturing process consists of two material components: raw beads and steam. That’s it. The beads, known as styrene beads, originate as an oily liquid byproduct of the petroleum industry. Rather than being run off as waste, the liquid form is processed to extract the oil and produce tiny, sand-like beads. When steam is added to the beads they expand to 40 times their original size, thus the name: expanded polystyrene.

About EPS beads | EPS Densifers For EPS Foam Recycling

Speaking of the hereafter, let’s talk about EPS recycling. The long life characteristics of EPS foam make it a great application for Geofoam and many other products, but it is also recyclable! Harden is able to offer EPS recycling equipment – EPS densifier.

EPS Densifier

EPS Densifier

EPS foam is put through the EPS densifier to get highly densed EPS blocks. EPS densifier reduces EPS foam volume by 50 times for easier transportation and further application. EPS densifier is a better solution for EPS recycling.

Study on Recycling of Polystyrene Foam that We Should Know

Polystyrene foam (EPS) plastic with low density, high specificity, low water absorption, acid and alkali, good insulation, shock, can be decorated, easy to shape, etc., which makes it a rapid development, and is one of the most widely used plastics in the world today.EPS Polystyrene

EPS applies in the home appliances, office machinery buffer packaging materials, containers and disposable tableware, etc. are used in large quantities as a one-time use of packaging materials, because of light weight, large size, with anti-aging, corrosion and difficult to be biodegradable. However, it dealing with a major problem, causing serious environmental pollution.

According to the relevant policies of the state, in response to the unified development of economic development and environmental protection, we must take the road of sustainable development of resources and sustainable development of the abandoned EPS for recycling. EPS densifier is the main EPS recycling equipment. Harden and Hasswell can offer EPS densifiers with competative prices. EPS densifier reduces EPS volume by 50 times by auger compaction, thus greatly saves transport and disposal costs. We can offer EPS densifiers with four models and also can tailor-made EPS recycling solution.

EPS Densifier

EPS Densifier

 

Comparing Polystyrenes: Looking at the differences between EPS and XPS

Insulation is a critical component to specify when designing a functional, cost-effective, and energy-efficient building. One method to insulate a building is by installing 50 to 152 mm (2 to 6 in.) of rigid foam insulation on the exterior side of the wall framing. Two of the most frequently installed types of rigid foam insulation are expanded and extruded polystyrene (EPS and XPS). Both serve the same basic function: providing a means to manage the passage of heat in a building system. However, they differ in important ways.

EPS

EPS

The primary responsibility of any insulating construction material is to offer positive thermal performance. However, this is not the only factor to account when specifying a rigid foam insulation material. It is also critical to know how it will perform under several situations.
XPS is manufactured in a continuous extrusion process that produces a closed cell form of foam insulation. EPS, on the other hand, is manufactured by expanding spherical beads in a mold and then using heat and pressure to fuse the beads together.
Each product has proponents claiming one out performs the other. However, it is key to understand each product may be more suited for a particular use than the other. This can be made clearer by examining each product’s thermal and moisture protection, fire and water resistance, and implications for sustainably designed projects.

 

Recycling EPS Foam – Is the Sky Falling?

Recycling EPS is No Myth!

We all remember the fable of Chicken Little and “The sky is falling!”. Chicken Little truly believed the sky was falling and went on a journey convincing others of this ghastly news. There are many different versions of this fable that is centuries old, but the moral remains the same: Do not jump to conclusions and then spread them like they are facts until you have all the information or facts Sadly today, when it comes to recycling expanded polystyrene (EPS), we have many “Chicken Littles” saying “You can’t recycle EPS.”

First things first. What exactly is EPS? EPS is expanded polystyrene foam. It is the white rigid foam that is commonly, but incorrectly referred to as Styrofoam. “Styrofoam” is a Dow trade-name, an extruded polystyrene, and it is actually blue in color. Why are there so many misconceptions about this versatile product? To start, both EPS and Styrofoam have different properties and uses. Unlike the blue foam (Styrofoam), the white foam (EPS) is indeed recyclable! The uses of EPS are virtually endless, ranging from insulation for coolers all the way to a soil substitute known as Geofoam. This recycled product has a variety of uses, from glue to park benches. In fact, not only is it recyclable, but there are also several different methods to do so. Take a look below.

The Grinder

One method of recycling EPS is grinding. Harden Industries can offer the grinder.  Waste polystyrene foam are emptied into the grinder and then moves through a de-duster. The ground particles are then reincorporated into manufacturing process to produce 1# density blocks. The ground product, or “re-grind”, is also sold to the horticulture industry to add to the soil of potted plants. The dust that is collected in this process is cubed and sold to vendors that make picture frames, park benches, trash cans and more.

EPS Grinder

EPS Grinder

Densifying

Another way to recycle EPS is to densify the product into solid logs or blocks. EPS densifier plays an important role in densifying process. EPS densifier can take large volumes of EPS scrap and extrude it into a small volume. The end use for this product is similar to the dust blocks but also includes surfboards. According to Harden Industries, a EPS recycling equipment provider, the volume reduction is 50:1.

EPS Densifier

EPS Densifier

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