The integrated LSR overmold lid is a high-end drinking lid structure manufactured using liquid silicone rubber (LSR) overmolding technology combined with PC, PP, or other engineering plastics.

This design replaces traditional multi-component lid assemblies by integrating sealing, opening, and flow-control functions into a single overmolded structure.

The result is a fully integrated lid system with enhanced sealing reliability, improved durability, and simplified assembly for modern drinkware products such as thermos bottles, sports bottles, and travel mugs.

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Principales caractéristiques et avantages

Fully Integrated One-Piece Structure

LSR overmolding eliminates the need for multiple sealing parts and assembly steps.

• No separate O-rings required
• Reduced component complexity
• Improved production consistency

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Excellentes performances d'étanchéité

The LSR material forms a tight, continuous sealing layer.

• Leak-proof design
• Stable pressure sealing
• Suitable for inverted and portable use

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Soft-Touch and User-Friendly Design

Silicone provides a comfortable tactile experience.

• Smooth and soft operation
• Ergonomic drinking experience
• Noise-free opening and closing

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High Temperature Resistance

Designed for both hot and cold beverage applications.

• Température de fonctionnement : de -40 °C à 200 °C
• Suitable for hot water and boiling liquids
• Dishwasher safe design capability

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Food Grade Safety

Medical and food-grade LSR options are available for beverage applications.

• Matériaux conformes aux normes FDA et LFGB
• Non toxique et inodore
• Safe for repeated contact with drinking water

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Improved Durability and Reliability

The integrated structure reduces failure points.

• No loose seals or assembly gaps
• Long service life under repeated use
• High resistance to fatigue and aging

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Processus de fabrication

The integrated LSR overmold lid is produced using precision injection molding technology:

1. Base Structure Molding
   PC, PP, or similar engineering plastic is molded into the rigid lid structure.
2. Préparation de la surface
   Surface treatment ensures strong bonding between plastic and silicone.
3. LSR Overmolding Injection
   Liquid silicone rubber is injected to form sealing and functional zones.
4. Durcissement thermique
   Silicone is vulcanized to create a permanent bonded structure.
5. Final Assembly Testing
   Sealing, actuation, and durability tests are performed.

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Caractéristiques techniques

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Applications

• Thermos et bouteilles isothermes
• Gourdes de sport
• Mugs de voyage et verres isothermes
• Baby drinking systems
• Outdoor hydration products
• Coffee and beverage containers
• High-end reusable drinkware

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Considérations techniques

LSR and Plastic Bonding

Strong adhesion is achieved through:

• Surface activation or plasma treatment
• Specialized self-bonding LSR materials
• Controlled mold temperature design

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Optimisation structurelle

The integrated design must balance:

• Sealing performance
• Opening mechanism reliability
• Long-term fatigue resistance

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Material Safety and Compliance

All materials can be selected for:

• Food contact compliance
• High temperature resistance
• Long-term stability in beverage use

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Foire aux questions

What is the advantage of an integrated LSR lid?

It reduces assembly parts, improves sealing reliability, and enhances overall durability.

Does it still require a sealing ring?

No, the LSR overmolding replaces traditional sealing rings with a one-piece structure.

Can it handle hot water?

Yes, it can withstand temperatures up to 200°C depending on material selection.

Le design peut-il être personnalisé ?

Yes, structure, function, hardness, and color can all be customized.