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Parallel Twin Screw Sheet Extrusion Line
1. The extrusion of PET sheet directly adopts a combination of parallel, co-rotating twin screws and a Roots vacuum pump for forced vacuum degassing, replacing the traditional single screw paired with crystallization drying equipment. This setup offers high output and low energy consumption, making it suitable for the production and processing of recycled PET bottle flakes.
2. The screw is designed with a building block structure, allowing for adjustments to the screw assembly according to different materials. This flexibility enables the same equipment to process not only PLA/PBAT biodegradable materials and starch-based degradable materials into sheet extrusions but also to produce PET sheet extrusions.
3. The large opening vacuum cylinder combined with a two-stage Roots vacuum pump can achieve an ultimate vacuum degree of 10Pa, maximizing moisture removal and preventing melt degradation.
4. A melt gear pump is applied between the extruder and the T-die. It stabilizes the extrusion pressure, ensuring uniform thickness of the extruded sheet. The pressure sensor after the pump uses a high-precision imported sensor, aiding in the realization of closed-loop control for the equipment.
5. The equipment utilizes a PLC system to achieve fully automated operation and parameter setting controls throughout the line.
Non-crystallization dry PET or PLA Sheet Extrusion Production Line
Characteristic classification
PET Sheet Twin Screw Extrusion Line with Venting (No Crystallization Drying)
Granuwel introduces an innovative PET sheet unit that eliminates the need for crystallization and drying, boasting low energy consumption and high efficiency. The product continuously improves and upgrades, featuring a significant technical enhancement to the core vacuum system by upgrading from the traditional Roots-water ring pump setup to a Roots-rotary vane pump arrangement. This upgrade allows the vacuum level to reach ≤10Pa. Additionally, the use of a special alloy steel thin-walled roller set significantly enhances cooling efficiency, thereby increasing output, product toughness, and transparency. Granuwel’s independently programmed operating system ensures a user-friendly and easy-to-operate device.
Diversified Feeding System
The system facilitates the measurement and blending of various raw materials in a one-step process, achieving sheet coloring, modification, etc. This reduces labor costs, electricity costs, and enhances the competitiveness of the products.
PLA (Polylactic Acid) Eco-Degradable Sheet Extrusion Production Line
PLA (Polylactic Acid) is a novel, bio-based, renewable biodegradable material made from starch raw materials derived from renewable plant resources such as corn and cassava. The production process of polylactic acid is pollution-free, and the product can be biodegraded in nature to achieve recycling, making it an ideal green polymer material. Polylactic acid possesses good thermal stability with a processing temperature of 170~230°C and excellent solvent resistance. Besides being biodegradable, products made from polylactic acid also feature biocompatibility, high gloss, good transparency, pleasant touch, and heat resistance. It exhibits good antimicrobial, flame-retardant, and UV resistance properties, thus finding widespread applications. It can be used for hard packaging of fruits, vegetables, eggs, cooked food, and baked goods, as well as packaging for sandwiches, biscuits, flowers, and more.
PBAT Environmental Protection Sheet Extrusion Production Line
Granuwel's PBAT Sheet Extrusion Production Line for manufacturing multi-layer composite eco-friendly sheets effectively utilizes the proportion of stone powder, which not only reduces the cost of sheet materials but also enhances the degradability of the sheets. This ensures the comprehensive physical properties and subsequent processability of the sheets.
Product features
Diversified Feeding System
Achieves the measurement and blending of various raw materials.
Building Block Type Twin Screw Barrel and Screw Elements
Flexibly and quickly adjust the barrel and screw structure according to different processes, optimizing mixing effects.
Forming Mold
The thickness and width of the forming mold are adjustable, meeting the requirements for producing a variety of product specifications.
Application fields
The four special applications of the underwater pelletizing system
There are four special applications that can only be handled by the underwater pelletizing system.
01
Applications in the Vacuum Forming Sector
This technology is utilized in various packaging applications such as food packaging, toy boxes, stationery boxes, gift boxes, tools, hardware for fruits, and other types of packaging.
02
Applications in the Antistatic Field
It is used in packaging for electronic components, permanent conductive packaging films, permanent antistatic films, and permanent semiconductor films.
03
Applications in Daily Life
It finds use in blister packaging, folding boxes, general packaging, printing, and card manufacturing industries.
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