Ashok Extrutech

A Two Layer Blown Film Plant is a type of plastic extrusion machine used to manufacture multilayer plastic films, primarily for packaging applications. This system uses the blown film extrusion process, but with two extruders and a specialized die that allows for the production of two distinct layers in a single film. Here's a detailed description:

🌟 Overview:

A Two Layer Blown Film Plant produces co-extruded films by combining two different types of polymer materials, which can be tailored to provide various functional properties like barrier resistance, strength, flexibility, and clarity.

🛠️ Main Components:

1. Twin Extruders:

   • Two separate extruders (usually labeled as A and B) melt and push out different resins.

   • Each extruder has its own barrel, screw, and temperature control zones.

   • Allows for different materials or additives in each layer.

2. Co-Extrusion Die Head (Two-Layer Die):

   • The melted polymers from both extruders are fed into a specialized die.

   • The die merges the two polymer streams into a single multilayer tube (film).

   • Die designs: spiral mandrel or stack-type.

3. Air Ring and Cooling System:

   • Surrounds the extruded bubble and provides cooling air to solidify the film.

   • Dual-lip or single-lip air rings are used depending on film thickness and clarity requirements.

4. Bubble Formation & Tower:

   • The extruded tube is inflated into a bubble with compressed air.

   • Height of the tower helps in cooling and stabilizing the bubble.

5. Nip Rollers & Haul-Off Unit:

   • Flattens and pulls the bubble upward to form a two-layer sheet.

   • Tension and speed control are crucial here.

A 35mm blown film plant refers to the screw diameter of the extruder – relatively small, designed for low-to-medium output, ideal for narrow-width HM-HDPE film used in things like carry bags, liners, and packaging film.

�� What is HM-HDPE?

HM (High Molecular) HDPE is a type of high-density polyethylene with:

• High tensile strength

• Good stiffness

• Excellent dimensional stability

• Slightly hazy (not as clear as LDPE or LLDPE)

It’s perfect for thin but strong films – like shopping bags or garbage liners.

A Plastic Carry Bag Making Machine is a specialized industrial machine used to produce plastic bags of various sizes, shapes, and thicknesses, typically from rolls of plastic film. These bags are commonly used for packaging, shopping, and carrying goods. Here's a detailed description of the machine, its components, and how it works:

Main Components

1. Unwinder Unit

   • Feeds the plastic film roll into the machine.

   • Equipped with tension control to ensure smooth film feeding.

2. Heat Sealing & Cutting Unit

   • Uses heated bars to seal the plastic and then cut it into bag-sized pieces.

   • Can be adjusted to produce different bag lengths and thicknesses.

3. Control Panel

   • Digital or PLC (Programmable Logic Controller) based.

   • Manages machine speed, bag length, sealing time, and temperature settings.

4. Folding System (optional)

   • For bags that require side gussets or center folding.

5. Punching Unit (optional)

   • Adds handle holes (like D-cut or W-cut) to the bags.

6. Conveyor or Stacking System

   • Moves finished bags to a collection area.

ABA Three-Layer Blown Film Plant, a highly efficient and cost-effective film extrusion system widely used in the flexible packaging industry. This type of plant is designed to produce strong, high-quality films while optimizing material usage, especially by incorporating recycled or lower-cost materials in the core layer.

What Is an ABA Three-Layer Blown Film Plant?

An ABA film line is a co-extrusion system that produces a three-layer film structure (A-B-A) using just two extruders:

• Extruder A: Feeds both outer layers (A-A)

• Extruder B: Feeds the inner layer (B)

This clever configuration helps manufacturers save costs while still producing films with excellent surface quality, strength, and printability.

Main Components & Workflow 1. Two Extruders (A & B)

• Extruder A: For outer layers (usually virgin LDPE/LLDPE/HDPE)

• Extruder B: For the middle layer (recycled material, calcium-filled PE, or lower-grade polymer)

2. ABA Co-Extrusion Die

• Specialized die head for 3-layer distribution.

• Ensures balanced layer ratios and good adhesion between layers.

3. Air Ring / Cooling System

• Cools the extruded film bubble.

• Optional IBC (Internal Bubble Cooling) for better thickness control and higher output.

A Polythene Bag Making Machine is a specific type of plastic bag manufacturing equipment designed to produce bags using polythene materials like LDPE (Low-Density Polyethylene), HDPE (High-Density Polyethylene), and LLDPE (Linear Low-Density Polyethylene). These machines are commonly used in packaging industries for producing carry bags, grocery bags, and general-purpose polythene bags.

Overview: Polythene Bag Making Machine

Polythene bag making machines take plastic film rolls and convert them into finished bags through a process involving feeding, sealing, cutting, and stacking. The process can be manual, semi-automatic, or fully automatic depending on the machine type.

🔩 Main Parts & Functionality 1. Film Unwinder / Roll Feeding System

• Holds the polythene film roll.

• Ensures smooth and controlled unwinding.

2. Tension Control System

• Maintains consistent film tension to prevent tearing or misalignment.

3. Heat Sealing Unit

• Heats and seals the bag at the bottom or side depending on configuration.

• Types: Impulse sealing or Continuous band sealing.

4. Cutting Mechanism

• Cuts the sealed film into individual bags using mechanical blades or hot knives.

5. Bag Punching / Handle Punching Unit (Optional for T-shirt Bags)

• Punches die-cut handles if making carry or grocery bags.

PPTQ stands for Polypropylene Tubular Quench, a specific process used to make high-clarity, high-strength biaxially oriented polypropylene (BOPP)-like films using the blown film process, but with some important differences.

It is specially designed for polypropylene (PP), which behaves differently from polyethylene and requires quenching (rapid cooling) to achieve optimal properties.

🔍 Key Features of PPTQ Blown Film Line:

1. Material:

   • Primarily Polypropylene (PP)

   • Can include metallocene PP, random copolymer PP, or blends

2. Film Characteristics:

   • High gloss

   • Excellent clarity

   • High tensile strength

   • Good barrier properties

   • Stiffness and crisp feel – often used for packaging snacks, textiles, etc.

An ABA Three Layer Die is a specialized die head used in blown film extrusion lines to produce three-layer film structures with two outer layers (A) and one inner core layer (B). This configuration allows manufacturers to combine different materials or reprocessed blends, improving film strength, cost-efficiency, and processability.

The ABA structure is an alternative to traditional ABC multilayer systems, offering similar benefits with fewer extruders (only 2 required instead of 3).

A ABA Multilayer Blown Film Plant is an advanced plastic film extrusion system used to produce co-extruded multilayer films—commonly used for packaging applications such as carry bags, garbage bags, shrink wraps, and more. The "ABA" structure refers to a three-layer film configuration where the outer layers (A) are made of high-quality material, and the inner layer (B) is typically made from recycled or lower-grade material.

This configuration significantly reduces production cost while maintaining film strength and quality.

What is ABA Blown Film Plant?

A blown film plant uses a process where molten polymer is extruded through a circular die and inflated into a bubble, then cooled, flattened, and wound into rolls.

In an ABA line, two extruders are used to create three layers:

• A Layer (Outer): Virgin or high-quality polymer

• B Layer (Core): Recycled or filler-enhanced material

• A Layer (Outer): Same as the first A layer

This setup helps optimize material usage, improve strength, and lower production cost.

Main Components of ABA Blown Film Plant

A Film Side Slitter is a specialized slitting device designed to trim the edges (sides) of plastic films during or after the extrusion or lamination process. It ensures the film roll has clean, uniform edges by cutting off uneven or non-usable film sections on both sides.

It is typically integrated into the winding or take-up section of a blown film extrusion line, cast film machine, or converting equipment.

Main PurposeTrims excess or uneven film edges

• Ensures perfect roll width and alignment

• Prepares film for rewinding, lamination, or printing

• Often includes a system to recycle trimmed edges