UV Pre-Treatment for Polycarbonate for Bonding LSR in a Multi-Component Injection Molding Process
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C. U. Schlitt
Abstract
In this study, the influence of UVC radiation and the influence of ozone on the surface energy of specimens made of polycarbonate were investigated. In an additional step, the peeling resistance of silicone flaps, which were overmolded, onto pre-treated PC plates of multicomponent specimens were analyzed. For this purpose, the samples were exposed to UVC radiation for different lengths of time, ranging from 5 s to 3 600 s. To further evaluate the influence of the ozone created by the UVC in the presence of oxygen, treatments were also performed in pure oxygen and nitrogen atmospheres. Contact angle measurements as well as analyses of the surface roughness were carried out to evaluate the effect of the treatment. Two phenomena were identified during the investigations. In room air and oxygen atmospheres, a short-term effect of UVC radiation was observed, which led to an increase in the surface energy, and, therefore, also to an increase in the wettability after an exposure time of only 10 s. In addition, a long-term effect was also found when tests were performed in a nitrogen atmosphere. This effect became visible after at least 60 s, and increased over the course of the duration exposure. The surface roughness of the polycarbonate plates increased up to about 60 % after 10 s of UVC exposure time in an air atmosphere, after 300 s of exposure to UVC radiation the roughness values had more than doubled. A modular injection molding tool was designed for the production of multi-component specimens. In this tool, a thermoplastic plate is molded on the one side, and is then automatically transferred by a robot system to be overmolded with silicone on the other side. The employed injection molding technique makes an intermediate treatment, such as surface activation of the thermoplastic plate, possible before it is overmolded. Also, the short-term and long-term effects of UVC treatment were able to be verified again for the peeling resistance of the material. These tests were only carried out for specimens treated in air.
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Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Research on Influencing Factors of the Thermal Contact Resistance in Thin-Wall Injection Molding
- Kinetic Analysis on Thermal Decomposition of Poly(lactic acid) Toughened by Calcium Sulfate Whiskers
- Fabrication of Double-Sided Micro-Lens Array Using UV Injection Molding
- UV Pre-Treatment for Polycarbonate for Bonding LSR in a Multi-Component Injection Molding Process
- Simulations of Heat Transfer in Thermoplastic Injection Molds Manufactured by Additive Techniques
- Cyclic Extrusion of Recycled High Density Polyethylene/Banana Fiber/Fly Ash Cenosphere Biocomposites: Thermal and Mechanical Retention Properties
- Effects of Zinc Borate on the Flame Retardancy Performance of Aluminum Diethylphosphinate in Polyamide-6 and its Composites
- Theoretical and Experimental Studies on Tribological Behavior of Luffa Fiber Reinforced Polyester under the Influence of Surface Treatment
- Global Modeling of Single Screw Extrusion with Slip Effects
- A Closer Look at the Bonding Capacity of Thick Metal-Plastic Hybrids
- Thermomechanical Degradation of Polyetherimide (PEI) by Friction-Based Joining and the Effects on Quasi-Static Mechanical Strength of Hybrid Joints
- Thermal, Tensile, Electrical, Dynamic Mechanical Thermal and Rheological Properties of Polyvinylidene Fluoride and Fluoroelastomer Composites Filled with Carbon Black
- Effect of Zinc Borate on Enhancing Flame Retardancy of Electron Beam Irradiated Alumina Trihydrate (ATH)/Acrylonitrile Butadiene Styrene (ABS) Composites
- Could Alfa Fibers Substitute Glass Fibers in Composite Materials?
- Analysis of a Single-Screw Extruder with a Grooved Plasticizing Barrel – Experimental Investigation
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Research on Influencing Factors of the Thermal Contact Resistance in Thin-Wall Injection Molding
- Kinetic Analysis on Thermal Decomposition of Poly(lactic acid) Toughened by Calcium Sulfate Whiskers
- Fabrication of Double-Sided Micro-Lens Array Using UV Injection Molding
- UV Pre-Treatment for Polycarbonate for Bonding LSR in a Multi-Component Injection Molding Process
- Simulations of Heat Transfer in Thermoplastic Injection Molds Manufactured by Additive Techniques
- Cyclic Extrusion of Recycled High Density Polyethylene/Banana Fiber/Fly Ash Cenosphere Biocomposites: Thermal and Mechanical Retention Properties
- Effects of Zinc Borate on the Flame Retardancy Performance of Aluminum Diethylphosphinate in Polyamide-6 and its Composites
- Theoretical and Experimental Studies on Tribological Behavior of Luffa Fiber Reinforced Polyester under the Influence of Surface Treatment
- Global Modeling of Single Screw Extrusion with Slip Effects
- A Closer Look at the Bonding Capacity of Thick Metal-Plastic Hybrids
- Thermomechanical Degradation of Polyetherimide (PEI) by Friction-Based Joining and the Effects on Quasi-Static Mechanical Strength of Hybrid Joints
- Thermal, Tensile, Electrical, Dynamic Mechanical Thermal and Rheological Properties of Polyvinylidene Fluoride and Fluoroelastomer Composites Filled with Carbon Black
- Effect of Zinc Borate on Enhancing Flame Retardancy of Electron Beam Irradiated Alumina Trihydrate (ATH)/Acrylonitrile Butadiene Styrene (ABS) Composites
- Could Alfa Fibers Substitute Glass Fibers in Composite Materials?
- Analysis of a Single-Screw Extruder with a Grooved Plasticizing Barrel – Experimental Investigation
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
