EVA Hot Melt Adhesive Underwater Pelletizing Line

This complete production system is specially designed for continuous manufacturing of EVA‑based hot melt adhesive pellets. It integrates reaction, melt extrusion, underwater pelletizing, dehydration, screening and storage into one closed production workflow. The line is widely used to produce EVA hot melt glue for packaging, book binding, woodworking, textile and adhesive tape industries, with stable pellet shape, uniform particle size and low moisture content of finished pellets.

Main Configuration & Technical Description

1. Two Sets of 1000 L Reaction Reactors 

The 1000 L reaction kettles serve as the mixing and reaction unit for EVA raw materials, tackifier resins, waxes, antioxidants and other additives. Each reactor is equipped with heating system, temperature closed‑loop control, stirring mechanism, feeding port and vacuum interface. Precise temperature control ensures full fusion and homogeneous reaction of all components. The dual‑kettle design realizes alternating feeding and discharging: while one kettle completes material reaction and feeds melt to the extruder, the other kettle carries out raw material mixing and heating. This arrangement achieves non‑stop continuous production and greatly improves production efficiency.

2. One Set of SJ180 Single‑Screw Extruder

The SJ180 single‑screw extruder is the core melt conveying and homogenizing unit. The screw and barrel adopt high‑quality alloy steel with nitriding treatment for high wear resistance and corrosion resistance, suitable for EVA hot melt adhesive formula with high tackifier content. The screw adopts a specially optimized mixing structure for hot melt adhesive, which guarantees uniform melt viscosity and stable extrusion pressure without local overheating or material degradation. Independent multi‑zone heating and cooling control matches the melting characteristics of EVA blends. The main drive uses frequency conversion speed regulation to flexibly cooperate with the feeding rhythm from the reaction kettles.

3. One Set of Hydraulic Screen Changer

The hydraulic screen changer is installed between the extruder outlet and the underwater pelletizing die. It filters impurities, carbonized materials and foreign particles inside the hot melt to guarantee the cleanness of the final hot melt adhesive pellets. It adopts fast hydraulic switching structure. Screen replacement can be finished quickly without shutting down the whole line, which minimizes production interruption. The sealing structure is designed for high‑viscosity EVA melt to avoid material leakage under working pressure.

4. One Set of Underwater Pelletizing Die

The underwater pelletizing die is customized for EVA hot melt adhesive. The die plate is made of high‑strength, corrosion‑resistant mould steel with precisely processed nozzle holes. The hot melt flows out from the nozzles and is immediately cut by high‑speed rotating blades inside the water chamber. The pellets are rapidly cooled by circulating water, which effectively prevents the EVA hot melt particles from sticking together. The structure of the water chamber is optimized for smooth material flow and easy cleaning during formula change.

5. One Set of Connecting Pipelines

The matched connecting pipelines are made of stainless steel with heat preservation and tracing design. They connect the reaction kettles, extruder, screen changer and pelletizing die. Heat tracing keeps the EVA melt at a stable temperature during transportation to prevent the melt from solidifying and blocking the pipeline. All flanges and valves adopt high‑viscosity material sealing configuration to reduce dead corners and avoid material carbonization after long‑time operation.

6. One Vertical Dewatering Machine

The vertical dewatering machine receives the water‑pellet mixture delivered from the pelletizing chamber. It uses high‑speed centrifugal separation to remove most surface moisture of EVA pellets. The inner basket adopts wear‑resistant filtering structure. After dewatering, the residual moisture of pellets is controlled at a low level. It features compact structure, stable running and convenient maintenance, matching the continuous feeding speed of the pelletizing system.

7. One Vibrating Sieve

The vibrating sieve is arranged after the dewatering process. It screens out oversized agglomerates, fine powder and irregular defective pellets. Adjustable vibration amplitude and screen mesh can be selected according to target pellet size. It ensures that only qualified uniform EVA hot melt adhesive pellets enter the next storage process, improving the consistency of finished products.

8. One Storage Silo

The screened qualified pellets are conveyed into the storage silo for temporary buffering. The silo is equipped with exhaust and dust‑removal structure. It can be connected to automatic packaging equipment to realize continuous discharging and packaging of finished hot melt adhesive particles.

Production Capacity

• Output range: 300 ~ 500 kg/h The actual production speed can be adjusted according to different EVA formulas, melt viscosity and target particle requirements.

Production Flow

Raw material proportioning → Reaction & mixing in 1000 L reaction kettle → Melt feeding → SJ180 extruder homogenization → Filtration by hydraulic screen changer → Underwater pelletizing by pelletizing die → Water‑pellet mixture conveying → Vertical centrifugal dewatering → Vibrating screening → Finished pellets storage in silo

Core Advantages

1. Dual 1000 L reaction kettles realize alternate feeding, supporting continuous non‑stop production.
2. Specially optimized extruder and underwater pelletizing system avoid adhesion of high‑viscosity EVA hot melt adhesive.
3. Hydraulic quick‑change filter reduces downtime and improves product purity.
4. Integrated dewatering, screening and storage unit ensures stable pellet quality and low moisture.
5. The whole line adopts heat‑preservation pipeline design, suitable for frequent formula switching of various hot melt adhesives.
6. Compact layout, easy operation and convenient internal cleaning.

1. Q: Are you a factory or trading company?

A: We are a factory and giving you the quickest reply in 24 hours.

2. Q: What's your company mainly in?

A: We are mainly produce Plastic Extruder, Vacuum Forming Machine for over 30 years.

Other machines have included machines in production line, such as luggage edge cutting machine and punching machine.

(We can produce total production line. )

3. Q: What's the material should have for our extruder machine( produce luggage purpose)

A: ABS. PC. PP.PE.PS.PET.HIPS granulates etc plastic material can do.

4. Q: How's your strength of your company?

A: Has a group of senior technical personnels, strong technical force, we have the

whole running system, including design, development, production, installation,service.

One year quality guarantee, life-time service.

5. Q: If your company has passed some certificates?

A: Yes, we have passed CE, ISO.

About Us

Packaging and shipping

What is our service system?

Why choose YAOAN MACHINERY?
1. Profession: YAOAN only make plastic extruder since 1980s, extensive experience and professional team ensure our leading position in plastic extruder industry.

2. Quality: The quality of products is footstone of enterprise's constant development, always endeavoring to do still better, quality comes first, developing & innovative is our responsibilities;

3. Delivery: We optimize factory management, and improve production flow so as to shorten production period for you in biggest extent;

4. Cost control: We do best to lower down production cost by our inner management improvement, so as to ensure that our products are competitive enough in market, and to realize higher performance-price ratio of our products.

FAQ
Q1: What is the guarantee of the machine?
A1: The guarantee period of our machine is 12 months after the machine is installed well in buyer's factory;

Q2: What package do you use for the machine?
A2: Painted the machine with anti-corrosion oil, and then covered with plastic film, and then packed into wooden case or fixed onto wooden pallet as per clients' requirements, or shall be loaded into container with film packing. After fixed all machines, we will use drying agent to keep container inside dry.

Q3: Do you have instruction manual to guide us if i buy the machine?
A3: Yes, we supply detailed user manual for your reference. PLS read it carefully for guide. If there is still problem which could not be solved, PLS contact us, we are ready to help you anytime.

Q4: What is your service to overseas clients?
A4: We supply perfect overseas service. We shall send engineers to overseas for machine installation and commissioning and test production guide, and also training to the workers of the buyer. And we are ready to give technical support anytime.