Why is automatic multi layers extrusion blow molding machine Better?

Nowadays literally all humankind use plastic products 24/7 all over the world. It is super easy to get access to all kinds of plastic products. You might have come across bottles that have a shiny layer on the outer side, or different colours on the outer and a different one in the inner. So, what it is? It is a multilayer extrusion product. Well, let me explain to you how what it is exactly.

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Multilayer extrusion blow moulding is the same technology as making a hollow container by blowing air into it. It uses more than two extruders to melt and plasticize the same or different plastics in different extruders. And then compounding, extruding and forming multi-layer concentric composite parison in the die. Its basic process principle is the same as the single-layer blow moulding technique. Only the moulding equipment uses several extruders to plasticize different kinds of plastics. Control of the integration and bond quality of plastic layers is the key to the multilayer co-extrusion blow moulding technology.

Multilayer co-extrusion blow moulding is developed to meet the needs in some industries with some special requirements. Such as the airtightness and corrosion resistance in pharmaceutical, food, and industry.

The following content will help you understand this technology better.

Multilayer Co-Extrusion Blow Molding Characteristics

Multilayer co-extrusion blows moulding hollow products are produced by extruding several different raw materials into hollow products through a multi-layer die head. To achieve the barrier performance of the container to external substances. Adopt coextrusion blow moulding, compound a variety of polymers together. Forming the multi-layer containers.

The advantages can be summarized as follows:

Improve the performance of the products. Such as strength, stiffness, softness, heat resistance, transparency and size stability. Improve the surface performance of products. No stripe, no speckle, no scratch. More smooth, cleaner.

Multilayer Co-Extrusion Blow Molding Material Selection

The development of multilayer co-extrusion blow moulding technology and equipment makes it possible to choose the best material combination plan. And this also realizes the production of ideal performance blow moulding products.

According to the production capacity range and performance requirements, this technique supports 2 to 7 layers of production. The no of layers increases depending upon your combinations of adhesive and barrier layer. When choosing material, the different layers should choose different materials. The inner layer and outer layer, choose all-new material, which is of high quality. Attention here, you should according to your production needs to choose suitable raw material.

Because we’re a water tank blow moulding machine manufacture, we usually produce a water tank by our machine to test it. For the water tank, HDPE is a good choice. We also use it. Most of our customers also choose HDPE. Its performance makes the blow moulding products more durable. And the intermediate layer, you can use waste material.

Multilayer Co-Extrusion Blow Molding Advantage

1. It provides higher quality blow moulding products under a more broad width and linear velocity.
2. Fill low-cost material. It can save high-quality resin. Recycling use of raw materials. Save the material cost.
3. Improve production efficiency.
4. The products under this technology are durable, more stable, the quality is higher.
5. Multilayer co-extrusion blow moulding products usually have high chemical resistance (oxidation resistance, light ageing resistance), harmful substance penetration resistance, odour migration resistance, compression resistance, impact resistance, smooth surface, heat resistance, and surface scratch prevention.

Multilayer Co-Extrusion Blow Molding Application

Food and Beverage

Packaging of tomato sauce, rapeseed oil, jam and milk, orange juice, carbonated beverage, beer, etc.

Multilayer co-extruded bottle products have three layers, five layers, and six layers. There are more plastic bottles with six layers of general materials.

Chemical Reagents

This kind of product usually consists of a three-layer combination, four-layer combination, five-layer combination, the six-layer combination of 5-10L barrels, plastic bottles below 1L, etc.

Industrial Buckets:

Industrial containers for storing and loading various liquids.

In addition to common water tanks, there are IBC buckets, double-ring buckets, and so on.

Industrial containers usually need to have certain impact resistance, and the characteristics of multi-layer co-extrusion blow moulding technology determine that multi-layer blow moulding products have a certain impact resistance.

Others:

Packaging in medicine and cosmetics

Tips:

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Multilayer co-extrusion blow moulding technology is certainly advanced. But only when it is applied reasonably can its advantages be brought into full play.

When we use this technology, we should ensure the stability of each performance. Operate it in standard steps.

Based on the stable development of this technology, the application scope of the equipment should be widened as far as possible.

That’s all, the detailed introduction of multilayer co-extrusion blow moulding is ending here.

MULTILAYER COMBINATION

In today's fast-paced world, plastic products have become an integral part of our daily lives. We rely on them 24/7, no matter where we are in the world. But have you ever paused to wonder about the intricate process behind the creation of these ubiquitous plastic items? Enter CO Extrusion Blow Molding (EBM) technology – one of the answers to this intriguing question.

1.Understanding Multi layer / CO Extrusion Blow Molding:

Multi-layer CO Extrusion Blow Molding (EBM) is a highly versatile technique employed in the plastic container manufacturing industry. It allows us to craft a diverse range of plastics, including HDPE, PVC, PP, and PC. EBM is especially known for its efficiency in producing multi-layer bottles.

2.The Art of Multi Layer / CO Extrusion Blow Molding – Step by Step:

• The Parison's Descent: It all begins with a hot tube of plastic material known as the "Parison." Emerging from an extruder, the Parison descends and meets a water-cooled mold.
• The Balloon Effect: As the mold closes, air is strategically injected from either the top or bottom parts of the container, akin to inflating a balloon. When the plastic material makes contact with the mold's inner surface, it freezes and retains its rigid shape, mirroring the contours of the mold itself.
• Flash Removal: EBM's brilliance extends to its ability to craft containers with precision. However, this precision often results in top and bottom flash, which needs further attention. These excess parts are delicately removed and trimmed in the sub-mold. For containers with handles or specific requirements, the flash removal process may involve the use of an automated deflashing device or skilled hands.
• The Final Touch: Following these meticulous steps, the containers emerge as finished products. But our journey doesn't end here. The bottles may undergo additional tests, such as leak detection, to ensure their quality aligns with their intended purpose.

3.Advantages and Disadvantages of Multi layer / Co Extrusion Blow Molding:

• Advantages：In the realm of plastic container manufacturing, the introduction of multi-layer blow molding machines heralds a new era of product excellence. These innovative machines not only extend the shelf life of filled materials but also elevate product sales by providing a robust shield against external factors and delivering functional advantages. Moreover, they hold the potential to carve a unique niche in the market, reducing competitive pressures.
• Disadvantages: While multi-layer blow molding machines offer numerous advantages, they are not without their challenges. These drawbacks include the intricacy of the equipment, demanding higher levels of technical expertise and incurring maintenance costs. Additionally, the energy consumption is relatively high due to the intricate heating, cooling, and extrusion processes they employ. Furthermore, when it comes to product design alterations or frequent shifts in production needs, these machines can pose challenges, making them less suitable for rapid product switching or the manufacturing of specific film shapes or sizes.

4.Multi-layer / Co Extrusion Blow Molding Products and Applications

• Food and Dairy
• Households
• Pharmaceutical / Cosmetics
• Lubricants / Petrochemicals
• Automotive
• Construction / Garden / Outdoor Supplies

5.Multi-Layer / Co Extrusion Blow Molding Machine Manufacturer

EVERWIN has more than 15 years experience for the extrusion blow molding machine.Our team has rich skill and knowledges in this field.And we could also help the customers to avoid problems in advance during proposal suggestion.If you are having opening projects,please feel free to contact with us.

Contact us to discuss your requirements of 500ML jerry can blow molding machine. Our experienced sales team can help you identify the options that best suit your needs.