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Twin-screw extruder is a key equipment in the industry of plastics polymers compounding and extruding. It can achieve polymer compounding and modifying, reaction, devolatilization, extrusion, granulating and is one of the core equipment in plastic industry.

The research and development, design, and manufacturing of Nanjing Keya’s one-step process equipment for sheet materials can be dated back to the 1990s. Nanjing Keya’s third-generation SK twin-screw extruder can achieve automatic production line from material conveying, proportioning feeding, compounding, exhausting to extruding and pressing, laminating, tracting, cutting, object holding manipulator, shrink packing, weighing, labeling and palletising.

In the context of more efficient production and enhanced environmental awareness, Nanjing Keya’s third generation one-step SK twin-screw extruder has the following distinctive advantages:

After 30 years specializing in plastics extrusion industry, Nanjing Keya has rich experience in materials.

The third generation SK provides high torque, high rotational speed and high capacity with stable and reliable performance.

The third generation SK achieves better material compounding and exhausting effect.

The third generation SK achieves an efficient reactive extrusion process and direct forming at a greater surface update rates.

The strong expansibility of control system can satisfy various users’ requirement for the degree of automation.

Supporting auxiliary machines are verified by Keya Supplier Access System （KAS）with reliable quality and good services.

The efficient compounding of SK can reduce the energy consumption  arising from material reheating and remelting, avoid low quality caused by polymer degradation, thus greatly promote production efficiency and lower labor costs.

Keya’s technical engineers are diligently exploring plastics polymers modifying, granulating and extruding technologies and are creating a broader space for customers who are expanding upstream and downstream industries. We look forward to having the technical communication and the cooperation with you!

Nanjing KY Chemical Machinery Co., Ltd. is one of the best extrusion screw manufacturers and plastic extruder machinery suppliers ,If you have any needs, you can contact with us.

Biodegradable plastics refer to a kind of plastic that is degraded by natural microorganisms such as bacteria, fungi and algae. The ideal biodegradable plastic is a kind of polymer material with excellent performance, can be completely decomposed by environmental microorganisms after waste, and eventually become an integral part of the carbon cycle in nature by inorganization. Biodegradable plastics are mainly made from natural polymers (such as starch, cellulose, chitin) or agricultural by-products through microbial fermentation or synthesis of biodegradable polymers, such as thermoplastic starch plastics, aliphatic polyesters, polylactic acid, starch/polyvinyl alcohol and so on.

The main target markets of biodegradable plastics are plastic packaging film, agricultural film, disposable plastic bags and disposable plastic tableware. Compared with traditional plastic packaging materials, the cost of new degradable materials is slightly higher. However, with the increasing awareness of environmental protection, people are willing to use new biodegradable materials with a slightly higher price to protect the environment. Enhanced awareness of environmental protection has brought tremendous opportunities for the development of biodegradable new materials industry. Recycled plastics refer to a kind of waste plastics that can be recycled and reused through a certain recycling process.

Waste plastics are mainly plastic film, plastic silk and knitted goods, foam plastics, plastic packaging boxes and containers, daily plastic products, plastic bags and agricultural films. After manual screening and classification, waste plastics are subjected to such processes as crushing, granulation and modification.

All kinds of transparent and opaque plastic particles are transformed, then classified according to the phase, and finally become reusable recycled materials. Biodegradable materials and recycled materials can be classified as environmentally friendly materials. With the increasing awareness of environmental protection, the industry of environmentally friendly materials has brought tremendous opportunities for development. Nanjing KY Chemical Machinery Co., Ltd. can provide a complete set of recycled plastic extruder solutions from raw material transportation to mixing granulation according to the characteristics of environmental protection materials and according to the needs of customers. It contributes to environmental protection.

We produce screw extrusion machine,if yuo have any questions about it, you can contact with us.

Mixing Modification of Elastomer——Blending Modification of SBS/SEBS

Applications of Thermoplastic Elastomer:

The English acronym of Thermoplastic Elastomer is TPE. In the Chinese market, TPE refers to SBS/SEBS blending modification materials. Because SBS/SEBS elastomer usually has high viscosity and is difficult to be directly processed, TPE thermoplastic elastomer material (TPS) is prepared by blending SBS/SEBS with plasticizer oil, reinforcing resin, compatibilizer, functional assistant, compatibilizer and so on. Compared with SBS/SEBS, the modified TPE has lower viscosity, higher plasticity, easier processing and moulding. It also has a wide range of adjustable hardness and physical properties. And it does not need vulcanization, can be recycled to reduce costs and other characteristics, so the application field is more extensive. It is mainly used in all kinds of seals, automotive interiors, glue-coated materials, all kinds of pipe fittings, wires and cables, etc.

According to different hardness requirements, SBS or SEBS blending modification adjusts the proportion of SBS/SEBS, PP, filler and filling oil. Increased rigidity of PP, SBS/SEBS and filling oil can improve flexibility.

Features of Thermoplastic Elastomer:

Design of screw barrel with large aspect ratio. Large aspect ratio L/D=48:1-52:1 provides longer residence time, which is beneficial to the melting of resins and elastomers, homogenization and mixing of filling oil and polymers.

High-precision screw and barrel design. The clearance between screw and barrel is small, the dimension accuracy is high, and the screw structure is optimized to effectively complete the mixing process of resin melting, filler dispersion and filling oil homogenization.

Cutting method. At present, the underwater granulation device at home and abroad has been continuously improved, which basically meets the requirements of different hardness, so underwater granulation is adopted.

Mixing modification of elastomer——Description of TPV dynamic vulcanization process

Applications of Thermoplastic vulcanizate:

Thermoplastic vulcanizate is referred to as TPV in short. It is a process that combines some properties of vulcanized rubber with processing properties of thermoplastic plastics. At present, the common components are PP, EPDM, filler, filler oil, crosslinking agent and processing aids. The so-called dynamic vulcanization refers to the simultaneous vulcanization (crosslinking) and melts dispersion of rubber. In the continuous phase of the vulcanized rubber phase uniformly dispersed resin, the particle size of the dispersed phase is 1-2 micron under the appropriate temperature field and shear field, which puts forward very high requirements for the blending equipment and preparation technology. TPV products are mainly used in all kinds of seals, soles, pipes, wires and cables.

Features of twin-screw extruder:

The twin-screw extruder with high speed and high torsion is adopted. High torque can withstand larger loads and adapt to the characteristics of high strength of vulcanized rubber melt; high screw speed provides a higher shear rate, which disperses vulcanized rubber into small rubber particles and evenly disperses in resin.

Screw barrel with large aspect ratio and multi-way metering feeding. Large aspect ratio L/D=48:1~52:1 provides longer residence time, which is conducive to completing the melting homogenization, vulcanization and dispersion of complex mixing process. At the same time, it is equipped with multiple groups of metering feeders to feed resin, rubber, filler, filling oil and crosslinking agent into the barrel step by step.

High-precision screw and barrel design. The clearance between screw and barrel is small, the dimension accuracy is high, and the screw structure is optimized. The melting process of resin and the homogenization process of filling oil are effectively completed, and the dynamic vulcanization process is completed by shearing and dispersing components.

Cutting method. At present, the underwater granulation device at home and abroad has been continuously improved, which basically meets the requirements of different hardness, so underwater granulation is adopted.

The above introduction is a one-step dynamic vulcanization process, which is suitable for the production conditions with stable formulation ratio. In actual production, due to the different requirements of product performance, the proportion of each component in the formulation varies greatly, and the proportion and degree of vulcanized rubber are also quite different, so the two-step dynamic vulcanization process will have stronger applicability. Two twin-screw extruder production lines:

The upper twin screw mixes PP, EPDM, filler and a small amount of filling oil evenly and granulates.

The lower-order twin-screw mixes the homogeneous polymer, most of the filling oil and crosslinking agent to complete the crosslinking of EPDM and disperse it evenly.

Our company produce mini plastic extrusion machine, RFQ today!

Characteristic of co-extrusion composite decking

1. Safety: Co extrusion composite deckingcan resist high strength acid, alkali and salt, and can be used in water for a long time. The synthetic wood formed by wood fibre and polymer blended with warming agent has the characteristics of strong impact resistance, non-cracking, non-delamination and high load-bearing. At the same time, the product also has the advantages of raw material structure. It does not need to use benzene, formaldehyde and other elements, and it is true environmental protection, low-carbon raw materials.

2. Stability: The co extrusion deckinghas strong temperature resistance and low color fading rate in a complex and changeable outdoor environment (-70 -60) without deformation and embrittlement. At the same time, the hydrogen chloride atoms in polymer products have the properties of waterproof, moisture-proof, mildew-proof, corrosion-proof, insect-proof, effective flame-retardant, anti-ultraviolet radiation and thermal insulation. It is an excellent substitute for outdoor wood.

3. Authenticity: Co-extrusion composite decking has an exquisite appearance and chic appearance. It has natural wood grain, color and texture, and has a real sense of closeness to nature. It focuses on the performance of engineering design and product material details of texture and color texture.

4. Practicality：Co extrusion composite decking has the great advantage of secondary processing. It can be processed into its desired shape after secondary heating. Products can be cut, saw, planer, drill, nail. Lacquer has the ability of industrial design. The joint of Co-extrusion composite decking is mostly designed by means of socket and clasp. Therefore, the installation and construction are simple, convenient and fast, which can meet the different needs of customers.

5. Comfort products are sound insulation, insulation, anti-oil pollution, anti-static, and anti-moth.            

6. Recycling products can be 100% recycled.

Advantages of co-extrusion composite decking

Fire protection: In the long-term high-temperature weather, this product is non-flammable, and non-spontaneous combustion.

Anti-moth: Because of the humid weather, compared with other products, it can prevent insects.

Waterproof: It won't foam and deform after a long time of soaking in rainwater. It's not easy to break.

Anti-pressure: Under the standard condition, the product will crack continuously without peeling. Its affordability is big.

Recyclable: It can be recycled to protect the environment.

Environmental protection: This product has no preservatives, no formaldehyde, ammonia, benzene and other six major metal elements. Children can touch it.

Weather Resistance: It is stable under sunlight, below 65 degrees C and below 70 degrees C.

WPC PRODUCTS FAMILY

Sundi is one of the leading wpc china manufacturer. China WPC is easy to process, with high surface hardness, water resistance and corrosion resistance, long service life, wide application range, and can be customized. Sundi WPC products can change their density, strength and other characteristics through additives, and can also meet special requirements such as anti-aging, anti-static, and flame retardant. Most importantly, wood plastic composite China is an environmentally friendly product that can be recycled.

The introduction of the advantages of wood plastic composite decking floor:

1. Long service life: The service life of wood plastic composite decking floor is three to four times higher than that of ordinary wood, that is to say, it can be used for 10 to 50 years. It has a long use time, so the wood plastic composite decking floor is more cost-effective naturally.

2. Loss is lower than wood: the use of wood in then wood plastic composite decking floor is less than the ordinary wood under the same conditions. And wood plastic composite decking floor is mostly hollow specifications, which can save more production materials. At the same time, the cost of hollow sheet is lower, and the price will be more favorable. Hollow profiles also have the advantage of reducing their own weight and load-bearing capacity. These are the advantages of wood plastic composite decking floor, while the ordinary wood can not do.

3. Maintenance cost is low: the performance of common solid wood needs to be protected by painting, and some protective paint is also applied in subsequent use, otherwise it will affect the service life. The wood plastic composite decking floor does not need this process, and it can be used after processing. It does not need painting, and the waterproof performance is also very good. Maintenance costs are much lower than wood products.

4. Environmental protection products can also be reprocessed: wood plastic composite decking floor use eco-wood, environment protection wood, and is renewable, and does not contain toxic substances, and can be processed. The products can be sawn, planed, bonded, fixed with nails or screw, etc. The installation is very convenient.

5. Exterior color diversity: It has natural texture of wood, and can also achieve personalized modeling, and has diverse product color, and will not produce cracks, warping, deformation during the, and also has no wood scar.

We are the most professional wood plastic composite manufacturers in china, RFQ today!

Polyethylene foam extrusion process is a new soft packing material. Due to its unique expanding reticulation structure and the elastic foamed net film, it is widely used in the package of glass product, precision instrument, various fruits, etc.

PE Foam Tube/Rod/Net Extruder produces qualified PE Foam Tube/Rod/Net Extruder by butane gas foaming method with several materials like Surface Active Agent, Talc Master Batch, Pigment, etc and providing the controlling system of each part by automatic systems. So closed cell polyethylene foams are formed with innumerable cells expanded by 15-40 times of Low-Density Polyethylene resins. It has been excellent results in its shock absorbing, moisture-proofing, heat insulating, chemical resistance and easy handling has widely been used for industrial packaging, construction and agricultural purposes. Our PE Foam Tube/Rod/Net Extruder is designed by the precise technology of Longkou City Hongrun Packing Machinery Co., Ltd. to provide high quality and good service to customers.

PE Foam Net Extrusion Line & PE Foam Pipe Extrusion Line produces PE foam pipe, rod, and net which are excellent materials for insulation application, construction industry, and protection packaging by the economical extruding system.
A unique screw provides an intensive mixing and enables the production of quality foam sheet with any cell size and density.
Our dies, specially manufactured for its high tolerance, provide an efficient process and flexibility to create the highest quality foam to meet customer’s diverse demands.
Auto temp. control via PID temp. control or PLC controlled touch screen on customer’s request.
AC motor and variable frequency inverter control system are durable at any harsh factory environment.

The PS foam sheet extrusion line adopts the twin-screw series high foam sheet production process, and the produced PS foam sheet is a new type of packaging material, which not only has good heat insulation and cushioning properties but also has pearl-like Appearance color. It is mainly used in the manufacture of disposable tableware. It can be used to make various types of food containers such as lunch boxes, trays, and dishes. It can also be used in the production of advertising and packaging of industrial products. It has the characteristics of high output, stable performance, a high degree of automation and high product quality.

Application
Fruit, vegetable and raw meat trays; food industry and fast food packaging; egg packaging.
Fast food boxes, bowls, trays, and other cutlery.
Medical materials; decorative materials.
Building insulation (wallpaper, filling material and ceiling).
For cold or hot polystyrene containers to hold in cooked food or ice cream.
Polystyrene can be used for printing, easy to stack, waterproof, antibacterial and good insulation.