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  펄스UV 세정 시스템 (PULSE UV CLEANING)

 

 

Home > Pluse UV System > Pulse UV Cleaning  

 

 

     

 

 

펄스UV 표면 세정 / 표면개질 시스템   (PULSE UV SURFACE CLEANING / DEVELOPMENT SYSTEM)

 

Non-Contact Surface Treatment

 

img73.gifPulsed UV can be used as a non-contact polymer and metal surface treatment, as reported by Prof. Lawrence T. Drzal, Composite Materials & Structures Center, Dept. of Chemical Engineering and Materials Science, Michigan State University (USA).

Paint and adhesive performance depends on the quality (cleanliness and surface energy) of the substrate (adherent) surface. Disadvantages of existing surface pretreatment methods like plasma, flame, corona, and solvent washing are labor intensive, time consuming, damage to the adherent surface, and emission of volatile organic compounds. Many polymers used as matrices for polymer composites are being investigated. Figure 8 obtained at MSU within the past year with a wide range of thermoset and thermoplastic polymers illustrates the significant improvements in surface energy that can be obtained and that have resulted in better wetting of plastic surfaces by adhesives and coatings, and substantial increase in adhesion of UV treated surfaces as measured by a tensile butt test to an epoxy matrix. Polymers investigated have included thermoplastic as well as thermoset matrices. Although this group of polymeric matrices represents some of the materials commonly used in industry (TPO, Polypropylene, Polyester, Polycarbonate, Poly Phenylene Sulfide, Poly methylmethacrylate and vinyl ester), the breadth of applicability of this pulsed UV treated method indicates that it has a high potential of being very useful with other materials as well.

 

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.Thermoplastic polyolefin (TPO).

.Reactor Grade (RTPO).

.Mechanical grade (MTPO)

.Sheet molding compound (SMC) .

.Regular (SMC1).

.Toughened (SMC2)

.Polyphenylene Sulphide (PPS).

.White (PPS1).

.Black (PPS2)C

 

.Polypropylene (PP)

.Polybutylene terephthalate (PBT)

.Bulk Molding Compound (BMC)

.Diene rubber (DR)

.Ethylene Acrylic Rubber (EAR)

.Polymethyl methacrylate (PMMA)

.Vinyl Ester (VE)

.Polycarbonate (PC)

.Bexloy (Ionomer) Composite

 

Figure 8: Samples treated with pulsed UV (Figure provided by Prof. Lawrence T. Drzal)

 

 

A model including the important parameters of this UV surface treatment and comparison of methods are shown in Figures 9 and 10 respectively. The flexibility of pulse light delivery to the substrate (i.e., pulse recurrence frequency, pulse duration, and spectrum) brings “tuning” possibilities to various substrates. Pulsed UV meets the need for a continuous, environmentally benign, fast, cost effective and non-contact surface preparation process.

 

 

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Figure 9: Parameters for surface treatment process model. (Figure provided by Prof Lawrence T. Drzal)

 

 

 

 

 

Conventional Surface Treatments

(Flame, Corona, Plasma, Chemical)

Pulse UV Surface Treatment

Current Status

Flame, Corona and Chemical Wash are main stream surface treatment technologies.

Plasma - limited acceptance.

Developing technology - Equipment manufacturing base exists

Environmental Impact

Chemical - VOC emission, waste disposal

Corona - High levels of ozone produced.

Flame - Greenhouse gases, organic fuels.

Very low levels of ozone produced incontained environment.

Ability to Treat Complex Geometries

Flame, Corona and Plasma Treatments have severe limitations in treating complex geometries.

Line-of-sight treatment.

Potential to treatcomplex geometries is excellent.

Treatment Time

Corona Flame - Very fast treatment times Chemical, Plasma - Moderate treatment times

Fast treatment times(Time scales inversely with lamp power)

Hazards

Chemical - human exposure, waste disposal

Corona - very efficient Ozone production

UV protection for humans

Cost

Corona Flame, Chemical - Inexpensive

Plasma - Expensive

Inexpensive

Suitability in Manufacturing Environment

Corona, Flame - Web treatment applications.Removal of process gases required.

Chemical - Adverse environmental impact, hazardous.

Plasma - Unsuitable for large scales.

Excellent suitability for all applications. flat, complex geometries, large scale.Minimal hazards. UV protection,Removal of low levels of ozone required

 

 

 

 

Figure 10: Comparison of conventional surface treatment and pulsed UV. (Figure provided by Prof. Lawrence T. Drzal)

 

 

 

    

 

 

 

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FEATURED PRODUCTS

 

 

◎  UV CURING SYSTEM

   ◎   INFRARED DRYING SYSTEM

   ◎  PULSE UV SYSTEM

◎  OPTICAL INSTRUMENTS

   ◎   PHOTONIC SINTERING SYSTEM

   ◎  X-UV SYSTEM

◎  SOLAR SIMULATION SYSTEM

   ◎   WEATHER / FADE TESTING SYSTEM

   ◎  PULSE UV STERILIZATION SYSTEM

◎  XENON IRRADIATION SYSTEM

   ◎   ENGINEERING

   ◎  INSPECTION SYSTEM

◎  LIGHT SOURCE

   ◎   PHOTONIC ACTIVATION SYSTEM