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Plastic Foam Package Production Line

Foam molding is the process of creating a microporous structure in plastics. Almost all thermosetting and thermoplastics can be made into foams. Commonly used resins are polystyrene, polyurethane, polyvinyl chloride, polyethylene, urea formaldehyde, phenolic and the like.

Plastic foam packaging is generally a disposable foam plastic lunch box, pearl cotton foam cloth / net / tube and other similar plastic. The foam plastic extrusion line produced by Longkou Hongrun Packaging Machinery Co., Ltd. uses physical foaming technology to melt polystyrene and polyethylene pellets and then foam to form a solid sheet/cloth/net/tube. The technology has been in existence for more than 100 years and has matured, and the foamed plastic packaging produced has been used in various fields.

Plastic Foam Package Production Line Series

The Main Purpose of Expanded Polystyrene

Expanded polystyrene (EPS), which has a relatively low density (1.05g/cm3), low thermal conductivity, low water absorption, impact vibration resistance, heat insulation, and sound insulation. It has the advantages of moisture proof, vibration reduction and excellent dielectric properties. It is widely used in mechanical equipment, instrumentation, household electrical, handicrafts and other shockproof packaging materials that damage valuable products and packaging of fast food. With the rapid development of the global economy, the amount of polystyrene foam is increasing. These waste polystyrene foams are light in weight and large in volume and are inherently resistant to aging and corrosion, which has become a major problem in waste disposal. In recent years, the recycling of expanded polystyrene has become the most concerned issue in the industry.

Expanded polystyrene has the advantages of low relative density (1.05g/cm3), low thermal conductivity, low water absorption, impact vibration resistance, heat insulation, sound insulation, moisture resistance, vibration damping, and excellent dielectric properties. Mechanical equipment, instrumentation, household electrical, handicrafts and other shock-proof packaging materials that damage valuable products and packaging of fast food. The foamed tableware, that is, the disposable foamed plastic tableware, is obtained by using a polystyrene resin as a raw material, heating and melting at a high temperature in an extruder, and then adding a foaming agent (butane) to perform an extrusion drawing to form a sheet. After the roll is placed in a humid and humid environment, it is then subjected to secondary heating and plastic forming, and various food and beverage utensils such as a snack box, a soup bowl, an instant noodle bowl, and a fresh tray are prepared.

Polyethylene Foamed Cotton

Polyethylene foamed cotton is a non-crosslinked closed cell structure, also known as EPE pearl cotton, which is a new environmentally friendly packaging material. It consists of low-density polyethylene glycol by physical foaming to produce a myriad of independent bubbles. It overcomes the shortcomings of common styrofoam, such as fragility, deformation, and poor recovery. It has many advantages such as water-proof, moisture-proof, shock-proof, sound-proof, heat preservation, good plasticity, toughness, recycling, environmental protection, strong impact resistance, etc. It also has good chemical resistance. It is an ideal substitute for traditional packaging materials.

Process Flow of Plastic Foam Package Production Line

Plastic Particles→Formulation Mixing→Heating Extrusion→Blowing Agent Injection→Hybrid Plasticization→Extrusion→Cooling Forming→Sizing Cutting→Cooling Traction→Plating→Winding→Finished Product

First, the raw materials such as polyethylene are uniformly mixed, put into the extruder hopper, melt-kneaded through a large aspect ratio extruder, and simultaneously injected with a high-pressure injection of a foaming gas and a molten monoglyceride in the middle of the extruder, and already melted. The mixed plastic is uniformly mixed, extruded by a machine head and a die, and cooled, drawn, flattened, and wound to form a foamed sheet (film) product.