However, due to the hard surface of nylon parts, there will be a very poor experience and easy to scratch the skin when in contact with the human body, so the surface of the nylon parts is covered with a layer of soft rubber (the hardness of the soft rubber is selected from 40A-80A, with Shore 60A-70A being the most common), which has the purpose of protecting the skin, and at the same time has a good tactile experience, and the appearance of the parts has good design flexibility and improves added value.
Overmolding recommendations |
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Substrate Material |
Overmold Grades |
Typical Applications |
Polypropylene (PP) |
Sport Grips, Leisure Handles,Wearable Devices Knobs Personal Care- Toothbrushes, Razors, Pens, Power & Hand Tool Handles, Grips, Caster Wheels,Toys |
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Polyethylene (PE) |
Gym Gear, Eyewear, Toothbrush Handles,Cosmetic Packaging |
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Polycarbonate (PC) |
Sporting Goods, Wearable Wristbands, Handheld Electronics, Business Equipment Housings, Healthcare Devices, Hand and Power Tools, Telecommunications and Business Machines |
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Acrylonitrile Butadiene Styrene (ABS) |
Sports & Leisure equipment, Wearable Devices, Housewares, Toys, Portable Electronics, Grips, Handles, Knobs |
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PC/ABS |
Sports Gear, Outdoor Equipment,Housewares, Toys, Portable Electronics, Grips, Handles, Knobs, Hand and Power Tools, Telecommunications and Business Machines |
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Standard and Modified Nylon 6, Nylon 6/6, Nylon 6,6,6 PA |
Fitness Goods, Protective Gear, Outdoor Hiking Trekking Equipments, Eyewear, Toothbrush Handles, Hardware, Lawn and Garden Tools, Power Tools |
SILIKE Si-TPVs Overmolding can adhere to other materials through injection molding. suitable for insert molding and or multiple material molding. Multiple material molding is otherwise known as Multi-shot injection molding, Two-Shot Molding, or 2K molding.
SI-TPVs have excellent adhesion to a variety of thermoplastics, from polypropylene and polyethylene to all kinds of engineering plastics.
When selecting an Si-TPV for an over-molding application, the substrate type should be considered. Not all Si-TPVs will bond to all types of substrates.
For more information regarding specific over-molding Si-TPVs and their corresponding substrate materials, please feel contact us.
Si-TPV soft over-molded material is an innovative way for manufacturers who produce hand and power tools, they need unique ergonomics as well as safety and durability, Main products applications include hand and power-tool grips handles such as cordless power tools, drills, hammer dills & impact drivers, dust extraction and collection, grinders, and metalworking, hammers, measuring and layout tools, oscillating multi-tools and saws...
For nylon lagging is more commonly used to use physical lagging methods, that is, to achieve the purpose of covering nylon parts through buckle design, surface rolling, and surface tapping. However, this method will have great drawbacks, it has strong adhesion in the physical connection part, and does not have strong adhesion in other parts, which is easy to cause falling off and has a low degree of design freedom. Chemical lagging uses the molecular affinity, polarity or hydrogen bonding force between the two materials to achieve the effect of wrapping. Naturally, the use of chemical lagging allows for a secure fit in each part while giving a great deal of design freedom.
As an elastomer, TPU has certain advantages in mechanical properties and wear resistance, cold resistance, oil resistance, water resistance, etc., and its polarity is not much different from nylon, so it is often used as a material for covering nylon. However, in the actual use process, there are often problems that poor adhesion leads to the lagging falling off, which affects the service life of the product. In response to this pain point, SILIKE provides a good solution, the use of Si-TPV for nylon lagging can not only improve the mechanical properties and wear resistance, cold resistance, oil resistance, water resistance and other characteristics on the basis of TPU, but also its excellent bonding performance also provides a guarantee for the extension of the service life of nylon lagging.