Home Custom ProductsLSR Overmolding Plastic Overmolded with Silicone

Custom high-end neck massager featuring liquid silicone overmolded onto plastic

Custom high-end neck massager featuring liquid silicone overmolded onto plastic

Shenzhen ES Electronic Co., Ltd., as a professional supplier of LSR (Liquid Silicone) products, leverages its leading LSR Overmolding integrated molding technology to help high-end neck massagers achieve softer, more fitting, and more durable functions, setting a new standard of comfort and quality benchmark for the high-end neck massager market and redefining the comfortable and skin-friendly wearing experience.

Key Features

3D biomimetic streamlined structure that contours to the cervical spine, ensuring a pressure-free fit.
Food-grade/medical-grade LSR (Liquid Silicone Rubber)
IP68 waterproof rating; resistant to tearing, aging, yellowing, and sweat-induced corrosion.
Precision micron-level LSR overmolding ensures a flawless, integrated bond that won’t peel or detach.
Features a refined matte or skin-like finish—soft to the touch with a high-end, sophisticated feel.

Send Inquiry

Product Description

Product Overview

Shenzhen ES Electronic Co., Ltd. customizes neck massagers using food-grade/medical-grade liquid silicone, and is ISO 10993 biocompatibility certified. With a texture as soft as a baby’s skin, they provide an exceptionally safe therapeutic experience, even for those with sensitive skin. Through precise mold control, Shenzhen ES Electronic Co., Ltd. can achieve a delicate matte finish or a skin-friendly coating on the liquid silicone surface—perfectly aligning with the "luxury" positioning of high-end products.

For these premium neck massagers, Shenzhen ES Electronic Co., Ltd. employs an overmolding (injection-encapsulation) technique. A rigid plastic framework (such as ABS or PC) is injection-molded first, followed by a secondary injection process that bonds liquid silicone rubber (LSR) directly onto the frame. With injection precision maintained at the micron level and mold accuracy controlled within 0.003mm, the liquid silicone layer is guaranteed to be uniform in thickness—free from air bubbles or material voids. This process creates a robust chemical bond between the silicone and the plastic substrate, resulting in a seamless, gap-free integration that requires no adhesives and leaves no visible parting lines, eliminating any concerns about the silicone peeling away.

These high-end neck massagers are manufactured using a "cold runner" system, which enables rapid curing (typically ranging from a few seconds to one minute). When integrated with automated systems and rotary-table molding machines, this allows for high-volume, fully automated production.

Core Advantages

1.Ergonomic Design: Shenzhen ES Electronic Co., Ltd. creates custom 3D biomimetic, streamlined inner shells tailored to the natural curvature of the human neck. This ensures that electrode pads or physical massage heads maintain perfect contact with the cervical spine. Whether the user turns their head or looks down, there is no uncomfortable pressure—only a consistent, reliable massage experience.

2. Through a seamless, integrated design and the use of food-grade materials, the neck massagers customized by Shenzhen ES Electronic Co., Ltd. achieve an IP68 waterproof rating. They are also tear-resistant, anti-aging, easy to clean, and resistant to yellowing.

3. Shenzhen ES Electronic Co., Ltd. operates a fully automated liquid silicone rubber (LSR) injection molding facility, which includes a Class 100,000 cleanroom. Automated visual inspection systems are employed to ensure consistency across every batch of neck massagers, maintaining dimensional tolerances within ±0.05mm and uniform surface quality. Given the specific usage requirements for neck massagers, we conduct rigorous testing—including peel-strength tests (to ensure the silicone remains firmly bonded to the plastic), salt-spray tests (to verify resistance to sweat-induced corrosion), and fatigue testing (simulating 10,000 bending cycles)—to guarantee stable product performance.

Application & Custom Service

Shenzhen ES Electronic Co., Ltd. specializes in liquid silicone rubber (LSR) overmolding (two-shot injection molding). This technology is widely used in high-end portable cervical massagers and is also applied to a broad range of other massage devices, including those designed for the head, eyes, face, shoulders, and waist.

Shenzhen ES Electronic Co., Ltd. utilizes a two-shot injection molding/overmolding process that combines liquid silicone rubber (LSR) with rigid plastics (such as PC, PA, PBT, etc.). This technology is applied across various sectors—including personal health and wellness, consumer electronics, mother and infant products, medical rehabilitation, and the automotive industry—in items such as neck massagers, eye massagers, head massagers, and beauty masks.

Customization & Ordering Information

1.Fully Customized Products: All ES Silicone products are custom-made based on customer requirements.

2.MOQ Requirements: MOQ varies by product category, structure, and production requirements. Typically, orders start from 100 pieces.

3.Prototype & Mass Production: We support prototype validation before mass production. Reasonable prototype fees apply and may be credited for qualified projects.

4.Engineering Support: Our engineering team provides DFM evaluation to optimize product feasibility and ensure stable production.

5.More Project Cases: Website examples represent selected non-confidential projects. Contact us for more customized applications and solutions.

6.Learn More About ES Silicone: Discover our capabilities and workflow through Who We Are and How We Work.

Hot Tags: Liquid silicone overmolding, silicone overmolding, liquid silicone overmolding manufacturer, silicone-over-plastic, custom silicone overmolding, silicone-over-plastic manufacturer

Bicycle light handle with plastic coated in silicone

The silicone-coated plastic bicycle light grip is a functional handlebar accessory specifically designed for bicycle light mounting and rider grip. It features a composite molding process with an outer silicone layer and an inner hard plastic base layer. The outer silicone layer provides anti-slip and shock absorption, while the inner plastic layer is strong and durable. This achieves improved performance in terms of anti-slip properties, shock absorption, and weather resistance, comprehensively enhancing safety and comfort for daytime commutes and nighttime riding. It is a lightweight, cost-effective essential upgrade accessory for cyclists.

Waterproof Outdoor Silicone Overmolded Buttons for Infrared Telescopes

This silicone-overmolded plastic button is applied to outdoor infrared telescopes of high-end global brands. It is manufactured via liquid silicone rubber (LSR) secondary molding technology.This effectively provides waterproofing, heat resistance, wear resistance, and impact resistance, making them suitable for various hot or cold environments.

Leak-proof liquid silicone encapsulation for electronic cigarette devices

Liquid silicone rubber (LSR) encapsulated plastic leak-proof components for e-cigarettes are made with food-grade liquid silicone material, ensuring a completely non-toxic and harmless process, and are FDA-approved. Utilizing a one-piece molding process, the elastic seal and rigid frame are integrated. This fundamentally solves the long-standing problems of oil leakage and condensate seepage in the e-cigarette industry, ensuring cleanliness and reliability throughout the product's entire lifecycle.

Massager Conductive Silicone Sleeve

This conductive silicone sleeve was custom-molded to meet the specific functional requirements of the massager's components. To satisfy the need for electrical conduction at the electrode pads located at both ends of the neck area, we employed specialized silicone processing techniques; this ensures that the inner silicone pad facilitates conduction at the ends—where it interfaces with the electrodes—while providing insulation in the center. This design enables the precise transmission of the electrical stimulation, pressure, and kneading forces generated by the electrode pads.

Liquid silicone encased plastic massage brush

Shenzhen ES Electronic Co., Ltd.'s custom-made silicone-coated massage brushes utilize a liquid silicone coating process, tightly integrating soft, food-grade liquid silicone with a high-strength plastic frame (such as PC, PA, PPSU, PBT, etc.) into a single unit. While ensuring structural stability and durability, this provides an extremely soft touch to the skin, offering a professional, comfortable, and safe massage solution.

Waterproof silicone-over-plastic buttons for night-vision devices

Shenzhen ES Electronic Co., Ltd.'s custom-made silicone-coated waterproof buttons for night vision devices utilize a one-piece molding process, fusing a hard plastic base with soft silicone into a single unit. These are human-computer interaction accessories specifically designed for night vision devices. They offer consistent tactile feedback, resistance to extreme temperatures and wear, and the ability to withstand harsh field conditions—such as high humidity, dust, and significant temperature fluctuations—ensuring stable operation of the night-vision device in complex environments.

Tell Us About Your Project

Share your requirements - we’ll provide practical solutions, engineering support, and samples.