68mm PP Double Wall Cap Wholesale| Dual Color Injection Molded Jar Lid & Custom Cosmetic Jar Lids

描述

Industry Pain Points: Three Core Challenges in 68mm PP Double Wall Cap Wholesale Sourcing

68mm PP double wall cap wholesale is a component that appears simple but dictates product seal integrity and shelf impact in cosmetic jar packaging. However, brands sourcing custom cosmetic jar lids face three structural challenges:

• Challenge 1: Limited dual-color process capabilities constrain brand visual expression. Traditional two-tone caps rely on post-mold spraying or printing—poor adhesion, prone to wear, and incapable of achieving the dimensional translucency of inner-outer contrasting colors. The dual color injection molded jar lid uses bi-injection molding to form the cap in one cycle: a transparent outer layer over a colored inner layer, or two contrasting colors bonded at the molecular level. This eliminates fading and cheap tactile impressions at the source. But few factory-direct manufacturers master this process; most suppliers offer only single-color caps with labels.
• Challenge 2: The engineering challenge of 68mm wide-mouth sealing and torque control. The 68mm wide-mouth cap must precision-fit a 68/400 standard jar neck. The contact between sealing liner and thread determines the shelf life of cream products. Low-quality caps deliver inconsistent torque—loosening in transit, allowing air ingress that oxidizes and dries the formula. The engineering core of 68mm PP double wall cap wholesale lies in thread precision and the uniform compression of the sealing liner by the double-wall structure.
• Challenge 3: The forced shift to mono-material and PPWR compliance. PPWR fully applies from August 2026, requiring plastic packaging recyclability of no less than 70% and encouraging mono-material design. Traditional caps using PP mixed with PET or metal inserts require disassembly during recycling—driving compliance costs up. A sustainable custom cosmetic jar lids solution must start with the material structure of the cap itself.

Addressing these pain points, IDEALPAK introduces the 68-tooth PP dual-color injection wide-mouth cap series—delivering bi-injection molding, 68/400 precision threads, and 100% PP mono-material construction as a one-stop Dual Color Injection Molded Jar Lid and Custom Cosmetic Jar Lids solution.

68mm PP Double Wall Cap Wholesale – Core Specifications and Structural Design

This 68mm PP Double Wall Cap Wholesale series is purpose-engineered for 68/400 standard wide-mouth jars—compatible with face cream jars, clay mask jars, body scrub jars, and various cosmetic containers.

The 73mm outer diameter and 20mm height provide ample grip edge for confident twisting. The 68/400 standard thread is fully compatible with mainstream 68mm wide-mouth jars—brands need not develop separate caps for different jar profiles. One cap system covers multiple product lines.

Dual Color Injection Molded Jar Lid – The Technical Moat of Bi-Injection

Engineering Principle of Bi-Injection

The core of the Dual Color Injection Molded Jar Lid is bi-injection technology. Through a rotary mold and two injection units working in sequence, the first shot forms the inner structural layer (typically colored PP), and the second shot overmolds a transparent or contrasting PP layer. The two layers chemically bond in the molten state, forming an inseparable integrated structure. This is fundamentally different from post-mold spraying: the color is embedded within the material—it never peels; the transparent outer layer delivers a deep three-dimensional luster that spraying cannot replicate.

Visual and Functional Synergy of Dual-Color Caps

Bi-injection serves more than aesthetics. The inner layer can use high-rigidity PP for thread strength and sealing performance, while the outer layer uses soft-touch or transparent PP for grip and visual depth. Brands can match the inner color to the jar body and keep the outer transparent, or use contrasting inner-outer colors for visual tension—achieving premium customization without additional post-processing steps.

Custom Cosmetic Jar Lids – Full-Dimensional Customization

Surface Effect Matrix

IDEALPAK offers a rich array of surface effects for Custom Cosmetic Jar Lids:

• Glossy Cap: Injection-molded finish, uniform sheen—ideal for fresh, youthful lines.
• Matte-Finish Cap: Fine frosted texture, aligned with minimalist and efficacy-driven brand identities.
• Pearlescent Cap: Pearl masterbatch compounded in-resin for a soft iridescent glow.
• Two-Color Cap: Inner-outer contrasting colors for visual depth.
• Transparent Two-Tone Cap: Transparent outer over solid inner—clarity and color simultaneously.
• Electroplated Cap: Metallic luster for premium anti-aging lines.
• Water Transfer Printing Cap: Complex textures precisely transferred—wood grain, marble, and more.

Decoration Processes and Color Customization

Silk screen printing renders logo and graphics on the cap top; hot stamping adds metallic texture; labeling offers flexibility for small-batch multi-SKU runs. Custom color supports Pantone matching—inner and outer layers can be specified independently, delivering a truly brand-exclusive cap.

OEM/ODM Full-Process Services

IDEALPAK provides one-stop OEM/ODM services from cap structural design and dual-color injection mold development to surface finishing. MOQ from 10,000 units per design. Sampling lead time: 7–15 days.

Mono-Material PP Cap – Sustainability and PPWR Compliance

100% PP Mono-Material Construction

This cap is PP from core to surface—no metal inserts, no PET composite layers. Recycling code 5 allows processing through existing PP recycling streams without disassembly. Under the PPWR “design for recycling” scoring system, a mono-material PP cap carries an inherent compliance advantage.

PCR Recycled PP Option

IDEALPAK supports adding post-consumer recycled PP (PCR) to the cap, meeting brand ESG goals and regulatory recycled content requirements. PCR material is equally viable in bi-injection: an inner layer using PCR PP with a virgin transparent outer layer maintains visual quality while increasing recycled content.

Factory Direct Capabilities and Quality Control

Dedicated Bi-Injection Production Line

IDEALPAK operates rotary-table bi-injection molding machines dedicated to dual-material caps and thin-wall cosmetic packaging. Mold precision is controlled within 0.02mm, ensuring batch consistency of the 68/400 thread.

Quality Testing Standards

Seal testing, torque testing, drop testing, dual-layer bond strength testing, thread go/no-go gauge inspection. Full or batch inspection before shipment.

MOQ, Sampling, and Delivery

MOQ from 10,000 units per design. Sampling lead time: 7–15 days. Full OEM/ODM support.

Application Scenarios

• Face Cream Jars: 68mm wide-mouth jars with dual-color caps—matte outer layer echoing a matte jar body.
• Clay Mask Jars: Transparent two-tone caps—transparent outer over an inner layer color-matched to the mask, commanding shelf attention.
• Body Scrub Jars: Electroplated caps elevating the bathroom aesthetic.
• Irregular Jars: 68/400 standard threads compatible with asymmetric jar openings—one cap system covers multiple jar profiles.

Closing

The value of 68mm PP double wall cap wholesale lies not in the cap itself, but in the seal trust, visual expression, and compliance certainty it carries. Dual color injection molded jar lid and custom cosmetic jar lids are no longer packaging accessories—they are a brand’s first line of defense in shelf competition and regulatory compliance.

68-tooth. 73mm outer diameter. Bi-injection. 100% PP mono-material. Full-dimensional customization. IDEALPAK gets it done in one go. Contact us. Start with a sample.