The working principle of the suction cup relies on the arching part of the package air, in use, the suction cup force to the plane-like wall, wall, glass pressure, the soft material of the suction cup deformation occurs, the package of air discharged, the formation of a vacuum. Inside and outside the suction cup to form the air pressure difference. Thus, the suction cup is firmly attached to the wall.
Suction cups used in the soft rubber material hardness is generally 60 ~ 70A, in line with this hardness of the soft rubber material mainly rubber (vulcanized), silicone, TPE and soft PVC four. TPU hardness is mostly in the 75A or more, generally rarely used as raw materials for suction cups.
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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Polycarbonate/acrylonitrile butadiene styrene (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 TPU particles are an innovative vulcanized thermoplastic silicone-based elastomer (silicone TPV) that combines the flexibility of rubber with the processing advantages of thermoplastics.SiTPV is low odor, plasticizer-free, and easy to bond to a wide variety of substrates, including PC, ABS, PC/ABS, TPU, PA6 and similar polar materials.Si-TPV is especially suitable for applications such as suction cups and is an ultra-soft, environmentally friendly solution.
PVC: PVC material is considered to be extremely high in the rate of household goods materials, but due to the harmful effects of plasticizers on the human body, many manufacturers gradually began to look for new materials to replace it. In addition, the compression permanent deformation rate of PVC is relatively large, aging resistance is also general, so it is not a qualified material used in suction cups.
Rubber: rubber in the suction cup application rate is high, but its processing cycle is often, low recycling rate, high cost. In addition, in terms of environmental protection, rubber has a big odor and other problems.
Silicone: silicone material is synthetic rubber, made of a variety of materials, complex production process, raw material prices are higher, higher processing costs. Silicone high and low temperature, oil resistance is better, but its wear and aging resistance is relatively poor. Tensile resilience is poorer than TPE.
TPE: TPE belongs to thermoplastic materials, but the gum content is high, recyclable. Superior processing performance, no vulcanization, can be recycled, reduce costs. But the general TPE is more suitable for the production of some small weight-bearing small suction cups, if the conditions of use of the suction cup weight-bearing requirements are very high, TPE can not meet the requirements.