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Solvent-less lamianting machine and dry laminating machine have their own advantages.And there are great differences in technical principles, mainly reflected in the coating way, coating film and compound firmness formation mechanism, as well as the role and requirements of drying, cooling, curing and other processes.
Dry Laminating Machine
Solvent-less Laminating Machine
Coating method - Laminating machine
- Dry lamianting machine is adopt anilox roller to do coating; The rubber layer is thick, the surface is concave and convex (wave peak) shape, the thickness is not uniform, can only do the simulation control, and the amount of glue is mainly determined by the mesh roller, can only be limited adjustment by replacing the mesh roller.
- Solvent-less laminating machine is adopt a multi-roll transfer coating method; Thin adhesive layer, uniform thickness; The amount of coating is mainly determined by the rotational speed of each roller and the thickness of coating can be adjusted online.
- Dry laminating machine mixing glue is basically offline manual operation, as a whole there is no online automatic mixing concept. There is no Automatic glue mixer in dry laminating machine .
Automatic glue mixer is a core component of solvent-free compounding machine, and there is no similar device in dry compounding machine.
Automatic glue mixing machine to complete the online delivery of two-component glue and automatic glue mixing, it is the most important solvent-free process guarantee equipment, we call it solvent-free compound machine “heart”. Because of the online automatic gluing, solvent-free compounding machine must have the corresponding interface and supporting parts (such as gluing mobile device) and control function.
Formation of coating layer and compound firmness - Laminating machine
- The coating layer of the dry laminating machine needs to be heated by the oven, and the initial viscosity is high; The adhesive layer and compound firmness are mainly formed on the machine, and the curing process only plays an auxiliary role. Adhesive layer formation is mainly a physical process of evaporation drying and compound pressure.
The initial adhesion of film on solvent-less laminating machine is low. The coating layer and compound firmness are mainly formed in the process of curing outside the machine. Adhesive layer formation is mainly a chemical process of reaction between two groups of glue (A.B glue).
Drying and cooling process - Laminating machine
- Multi-stage independent temperature control drying system and supporting cooling device are the basic components in dry laminating machine
- In dry composite process, drying and cooling are necessary processes, and the drying is usually at high temperature, and the drying and cooling temperatures of each section have an important effect on quality.
- The most common two-component solvent-free adhesive solvent-free compounding machine uses normal temperature coating and compounding environment, no drying system, usually no cooling device.
Solvent-free compounding processes do not require drying and cooling for single-component adhesives and not for two-component adhesives.
- Due to the rapid expansion of the scope of use and the base material, the use of solvent-free single group adhesive has increased in recent years, its coating and compound temperature is higher (such as 80 ~ 110℃), the corresponding cooling device is often used. But overall, the proportion of such compounding machine is still low.
Curing process - Laminating machine
- In dry composite process, curing process is usually an auxiliary process, curing temperature and time have a certain effect on the quality of composite.
In solvent-free composite process, curing process is the key process, curing temperature and time have great influence on the quality of composite.
Machine speed different - Laminating machine
- Dry laminating machine usually running speed of 120 ~ 200 m/min. Usually machine cost lower than solvent-less one .
Solvent-less laminating machine common running speed between 250 ~ 600 m/min .
This speed gap also reflects the solvent-free composite machine in the machining accuracy of mechanical parts, assembly accuracy, roller rigidity, safety considerations, vibration and noise treatment and many other major differences.
Power consumption - Laminating machine
- Dry laminating machine all with dry oven , machine power more higher than solvent -less laminating machine.
Solvent-free laminating machine without dry oven , machine power consumption more lower than dry type one .
Environmental protection and production safety - Laminating machine
- Dry laminating machine using solvent basic glue, which may pollute the goods in the package with residual solvent in the production process.
Solvent-less Laminating machine suitable rubber adhesive contains only, do not add any solvent, thus in the process of production, in addition to stop when the need to use a solvent to clean the part glue, without any solvent emissions, produces no waste matter, not because of a lot of evaporation of the solvent affect worker’s health, also won’t happen on the surrounding environment pollution, to protect the environment.
Composite film will not pollute the goods in the package because of residual solvent, clean and reliable.
Finished Product Quality - Laminating machine
- Dry laminating machine using solvent basic glue, which may pollute the goods in the package with residual solvent in the production process.
When do laminating ,if basic mateiral is shrink film that may be out of shape due to solvent and drying heating.
Final laminated roll of solvent-less laminating machine will not pollute the goods in the package due to residual solvent, clean and reliable;
When do laminating ,basic material will not be out of shape due to solvent and drying heating , to ensure the flatness of composite film.
Different structures - Laminating machine
Due to different uses and models, solvent-free compounding machine and dry compounding machine some of the same unit of the specific structure is different. For example :
- In unwinding and rewinding unit , usually solvent-less laminating machine adopt single unwinding and rewinding, while dry laminating machine is basically adopt double station model.
- About multiple independent tension control system , Solvent-less laminating machine tension system is mainly focus of rewinding tension (The tension from laminating unit to rewinding section) control. While in the dry lamianting machine this tension is not so critical.
- Two types of laminating machine rubber rollers are different. The dry laminating machine includes coating rubber roller and compound rubber roller . In addition to coating rubber roller and compound rubber roller in solvent-less laminating machine,it also with an important and unique rubber roller that transfer rubber roller.
Related laminating machine
KTLM-SB180 Series Dry Laminating Machine
- Suitable material : BOPP, PET, nylon, CPP, CPE, aluminum foil and paper, etc which in roll type.
- Speed: 50-150pcs/min
- Material roll width :1200mm ( can be customzied )
KTSM-V200 Series Plastic Film Slitting Machine
- Suitable material : BOPP, PET, CPP, CPE, PVC, Paper roll, etc.
- Max. Material Width:1300mm
- Min. final roll width : 50 mm
- Speed: 150-220m/min
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