Twin-Screw Grafting Equipment

Twin-screw grafting equipment is an indispensable core equipment in large-scale production. It is mainly used for surface modification of polymer materials. Currently, it is mainly used in high-performance modified plastics, plastic alloys, packaging materials, automotive parts and other fields. It has stable functions, high efficiency and durability!

Port: Shanghai, China
International Commercial Terms(Incoterms): FOB, CFR, CIF, EXW
Terms of Payment: LC, T/T
Certification: CE, ISO, UL, QS, GMP
Warranty: 1 Year
Average Lead Time: Peak season lead time: 3-6 months, Off season lead time: 1-3 months

A grafting reaction is a type of chemical reaction in which the chemical bonds of one molecule (referred to as the “backbone” or “substrate”) are broken, and then the functional groups of another molecule (referred to as the “branch chain” or “grafting agent”) combine with these broken sites to form a new compound.

Based on the breaking and formation of chemical bonds, the modification and functionalization of the backbone molecule are achieved by introducing branch chain molecules with specific functional groups.

Through grafting reactions, the properties of polymer materials can be modified, such as enhancing the materials’ mechanical properties and thermal stability.

Grafting reactions also have wide applications in the preparation of biomedical materials, for instance, in the production of biodegradable polymer materials and drug carriers.

Additionally, grafting reactions are applied in fields like coatings, inks, and adhesives, which can improve the performance and stability of products.

Host model	Aspect ratio L/D	Speed rpm	Capacity for reference kg/hr
CJWH – 65	56	400	300~500
CJWH – 75	56	400	500~700
CJWS – 75	60	400	700~900
CJWS – 95	60	400	1200~1800

Free Radical Grafting Process

Several Common Grafted Materials

1、Polypropylene (PP) Grafting
Through a twin-screw extruder, polar functional groups are introduced onto PP molecular chains to improve its wettability, printability, and adhesiveness.

2、Polyethylene (PE) Grafting
Using the strong shear force of twin screws, functional groups such as maleic anhydride are grafted onto PE molecular chains, enhancing its compatibility and interfacial adhesion. It is applied in industries like medical packaging.

3、Polyolefin Elastomer (POE) Grafting
Via twin-screw reactive extrusion, maleic anhydride, silanes, and other substances are introduced onto POE for grafting reactions. The resulting grafts are widely used in industries such as engineering plastic toughening, plastic alloy compatibilization, and photovoltaics. POE silane grafts can act as toughening agents and compatibilizers to improve the compatibility and adhesion between different materials (glass, EVA, backsheets) in photovoltaic modules. Additionally, POE silane grafts can be used as encapsulation materials for photovoltaic modules to enhance the performance of the encapsulation materials, improve their weather resistance and anti-aging properties, thereby extending the service life of photovoltaic modules.

Case Sharing

No	Component	Wt.%	Barrel zone
1	LLDPE	98.184	Zone 1
2	Peroxide	0.04	Zone 2
3	Maleic anhydride	1.48	Zone 4
5	Additive 1	0.098	Zone 8
6	Additive 2	0.148
7	Additive 3	0.05
		100

FAQ

Trade Capacity

International Commercial Terms(Incoterms): FOB, CFR, CIF, EXW
Terms of Payment: LC, T/T
Average Lead Time: Peak season lead time: 3-6 months, Off season lead time: 1-3 months
Number of Foreign Trading Staff:>50 People

Is Jwell Machinery a Manufacturer?

Yes, We own 5 manufacturing bases and sales center in Shanghai , Suzhou ,Changzhou, Zhou Shan, Dongguan China.
Jwell made the first Chinese screw and barrel in 1978 in brand name Jinhailuo.After more than 40 years development,
JWELL is one of the biggest extrusion machine supplier in China with 300design&test engineer, 3000 employees.
Jwell has become the premier supplier of extrusion lines and reliable business partners. Welcome to drop in us.

How do you ensure your machinery and service quality?

Our machines taking the European standards and follow the Germany type of business, we cooperation with
International famous brands Siemens Schneider Flender Omron ABB WEG Falk Fuji etc. Our company continuously
imports over 1000 international first-class high precision processing equipment such as multistage machining centers, CNC lathes and CNC milling machines from Korea, Japan etc. All our processes strictly adhere to CE certification,
IS09001 and 2008 quality management system . And we have 12 months quality warranty time. We testing the
machine performances before each delivery. Jwell service engineers will always be here for anything you needed.

How long is the delivery date?

Usually it takes about 1 – 4 months depends on different machinery upon receipt of order advance payment.

How can I order and make payments?

Once clear your requirements and determined extrusion line is ideal for you. We will send technical solutions and
Proforma Invoice to you. You can pay via TT bank transfer, LC as you like.

What is your Minimum Order Quantity?

One. We provide both customized extrusion lines and technical solutions. Welcome contact with us for technical
innovation or improvements for your future purchasing plan.

What is your production capacity?

We produce more than 2000 advanced extrusion lines every year world wide.

What about shipping?

We can send the small spare parts by air express for urgent matter. And the complete production line by sea
to save the cost. You can either use your own assigned shipping agent or our cooperative forwarder. The nearest
port is China Shanghai, Ningbo port, which is convenient for maritime transportation..

Is there any pre-after sale service?

Yes, we support our business partners by pre-after sale service. Jwell has more than 300 technical testing
engineers traveling world wide. Any cases would be responded with prompt solutions. We provide training, testing,
operation and maintenance service for a life time.