Product Overview
Plastic eye glass cases are hard-shell PP or PE enclosures for prescription glasses, reading glasses, safety glasses, and sunglasses, supplied either as an unlined molded outer shell or as a finished case with a sourced EVA or velvet liner.
Core Advantages
Living Hinge with 5,000-Cycle Life
A molded living hinge connects the lid and base without a metal pin. Controlled hinge thickness and PP toughness allow at least 5,000 opening and closing cycles while keeping the two shell halves aligned.
One-Meter Drop Resistance
PP or PE wall thickness is balanced so the case can flex during a one-meter drop without cracking. The shell keeps external impact and pressure away from the lenses and frame during bag, parcel, or counter handling.
Latch Holds the Closed Shell
Latch depth, lead-in angle, and shell stiffness are set for a clear snap engagement. The case stays closed during normal carrying but still opens without excessive force on the hinge or latch edge.
Product Parameters
|
Parameter |
Value |
|
Shell material |
PP or PE |
|
Hinge life |
5,000 open-close cycles or more |
|
Outside finish |
Paint / Leather texture / Natural |
|
Inside liner |
Velvet or EVA (outsourced) |
|
Drop resistance |
1 meter drop with no crack |
Customization
Options include internal length, width and depth, PP or PE material, hinge and latch geometry, natural, painted or leather-grain surface, shell color, molded or printed logo, and cavity allowance for an EVA or velvet liner.
Quality Control
Setup approval records hinge thickness, latch engagement, internal envelope, and shell alignment. Samples complete the specified opening-cycle and one-meter drop checks. Production inspection covers warpage, flash, sink marks, hinge whitening, and latch damage. After assembly, lined cases receive a separate fit and adhesion check.
FAQ
Q: What is the minimum order quantity?
A: The standard MOQ is 10,000 cases for one shell structure.
Q: Which shipping terms are available?
A: EXW and FOB terms are available.
Q: Is the EVA or velvet liner manufactured in-house?
A: The molded shell is produced in-house. EVA and velvet liners come from partner factories and can be assembled into the case when included in the order scope.
Q: How is the correct internal case size determined?
A: The internal envelope and clearance are based on the folded frame dimensions, lens curvature, bridge height, and temple thickness.
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