China sports sunglasses manufacturer for OEM/ODM, wholesale, and brands.

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Materials & Manufacturing.

TR90, polycarbonate, acetate and carbon-fiber frames, factory processes, quality control and testing for sports sunglasses.

6articles In this category
43total Published guides
Jul 2026 Latest update
16yrs Manufacturer since 2011

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6 posts
Materials & Manufacturing

TR90 vs Polycarbonate Frame Materials: A Practical Comparison for Eyewear Buyers

Frame material is the single biggest driver of weight, comfort, durability, and unit cost in sports sunglasses. At Julong, about 80% of the sports sunglasses we manufacture use either TR90 or polycarbonate. Understanding the trade-offs between these two materials is essential before you lock in a bill of materials. TR90: The Flexible Performance Default TR90 ... <a title="TR90 vs Polycarbonate Frame Materials: A Practical Comparison for Eyewear Buyers" class="read-more" href="https://julong.wxkntest.com/tr90-vs-polycarbonate-frame-materials-for-sport-sunglasses/" aria-label="Read more about TR90 vs Polycarbonate Frame Materials: A Practical Comparison for Eyewear Buyers">Read more</a>

Jul 26, 2026 · 2 min read Read →
Materials & Manufacturing

ANSI Standards Glasses Explained: Z87.1 vs. Z80.3 vs. Z80.1 (2026 Safety Guide)

When browsing for eyewear—whether for industrial procurement, sports retail, or personal protection—you will inevitably encounter a confusing alphabet soup of codes: Z87+, Z80.3, D3, U6. For many buyers, these markings are just regulatory hurdles. However, understanding the specific ANSI standards for eyeglasses is not merely about compliance; it is about knowing precisely how much protection ... <a title="ANSI Standards Glasses Explained: Z87.1 vs. Z80.3 vs. Z80.1 (2026 Safety Guide)" class="read-more" href="https://julong.wxkntest.com/ansi-standards-glasses/" aria-label="Read more about ANSI Standards Glasses Explained: Z87.1 vs. Z80.3 vs. Z80.1 (2026 Safety Guide)">Read more</a>

Dec 26, 2025 · 7 min read Read →
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