Product Certification · October 2026
Test Result — QTEC Certified
Standard
JIS L 1951
Heat-Shielding Rate
49%
Classification
S45
Tested By
QTEC Fukui
Product: TU307 Umbrella Fabric (3F AOC) · Report No.: No.26FI-080069-1 · Issued: October 5, 2026
Topumbrella TU307 umbrella fabric — JIS L 1951 heat-shielding classification S45 (49%), independently certified by QTEC Japan, Report No. 26FI-080069-1.
Heat Protection Is Becoming the Next Major Umbrella Buying Criterion
For most of the past decade, UV protection — measured as UPF rating or UV blockage percentage — was the primary functional claim driving premium umbrella sales across Asian markets. That benchmark remains important. But in 2026, a closely related and distinct metric is rapidly gaining ground: heat shielding — the umbrella fabric's ability to reduce the temperature experienced under the canopy, not just the UV radiation passing through it.
The shift is driven by climate reality. Japan's Meteorological Agency has formally established a new weather category — "extreme heat day," defined as a day reaching 40°C or above — highlighting the increasing urgency of heat protection outdoors. As heat waves and heavy rain become more frequent, more buyers in Japan, Korea, and Europe are seeking sun-and-rain umbrellas that genuinely reduce felt temperature, not just block UV.
For umbrella brands and sourcing teams developing product lines for these markets, heat-shielding certification is moving from a differentiator to a baseline expectation — and independently tested, standardized results are what buyers and retailers increasingly require to substantiate any product claim.
What JIS L 1951 Is — and Why It Is Japan's Reference Standard
JIS L 1951 is a Japanese Industrial Standard that defines the test method for measuring the heat-shielding properties of textile fabrics — specifically umbrella and parasol canopy material. The test exposes a fabric sample to a standardized heat-ray source and measures the temperature rise of a sensor beneath the fabric, compared to a blank (unshielded) reference. The heat-shielding rate is calculated from the difference between the two temperature rises:
| Classification | Heat-Shielding Rate | Meaning |
|---|---|---|
| S65+ | 65% and above | Premium — specialist heat-shielding parasol |
| S55 | 55–64% | High performance |
| S45 ← TU307 | 45–54% | Functional — JUPA-eligible for heat-shielding label claims |
| S35 | 35–44% | Entry-level — JUPA minimum for heat-shielding claims |
| S25 / S15 / S15− | Below 35% | Not eligible for heat-shielding marketing claims in Japan |
Why this matters for B2B buyers: Japan's umbrella industry self-regulatory body — JUPA (Japan Umbrella Promotion Council) — requires products to achieve a minimum S35 classification under JIS L 1951 before any heat-shielding performance claim may appear on labelling or marketing materials. Without a certified test result from an accredited testing body, no heat-shielding claim is accepted by Japanese retailers or distributors, regardless of how a supplier describes the fabric.
Our Result: TU307 Achieves S45 — What the Numbers Mean
Topumbrella's TU307 umbrella fabric (3F AOC) was submitted for independent JIS L 1951 testing at the Japan Textile Products Quality and Technology Center (QTEC), Fukui Branch — one of Japan's principal accredited textile testing institutions. The sample was submitted September 18, 2026; the report was issued October 5, 2026.
| Measurement | Blank (No Fabric) | TU307 |
|---|---|---|
| Surface temp at 0 min (°C) | 20.5 | 20.6 |
| Surface temp at 30 min (°C) | 52.0 | 36.7 |
| Temperature rise (°C) | 31.5 | 16.1 |
| Heat-shielding rate | — | 49% |
| Classification symbol | — | S45 |
The practical meaning: under standardized heat-ray exposure, an unshielded surface reached 31.5°C above its starting temperature. TU307 fabric reduced that rise to 16.1°C — a difference of 15.4°C. On a hot summer day, a 15°C reduction in temperature under the canopy is the difference between comfortable shade and significant heat exposure.
At S45, TU307 sits above the JUPA minimum threshold (S35) and is classified as functional heat-shielding — appropriate for sun-and-rain umbrellas, everyday parasols, and branded umbrellas where heat protection is a genuine product claim. Brands requiring S65+ for premium parasol positioning should contact us to discuss fabric specifications for higher-performance programs.
Official QTEC test result — Report No. 26FI-080069-1. Heat-shielding rate 49%, classification S45, issued by Japan Textile Products Quality and Technology Center (QTEC), Fukui Branch, October 5, 2026.
Why Independent Certification Matters — What Self-Declared Claims Cannot Do
In Japan's umbrella market, heat-shielding performance claims are governed by JUPA guidelines. The core requirement is that the performance figure must come from testing conducted by an independent, accredited testing institution — not from the manufacturer's own measurements or a fabric supplier's data sheet. A supplier claiming "49% heat-shielding" without an independent test report cannot substantiate that claim for Japanese retail compliance purposes.
Topumbrella's QTEC test report (No. 26FI-080069-1) specifies the product tested, the test method, the institution, the result, and the classification — the complete documentation package a Japanese retailer or distributor would require before accepting a heat-shielding product claim on labelling or in catalogue copy. The report is available on request.
What This Means for Brands Building Heat-Shielding Umbrella Programs
TU307 heat-shielding umbrella — available for OEM custom programs from 500 pcs per style. Custom colour, logo printing, handle and frame configuration supported.
Climate-driven consumer demand and Japan's structured certification system create a concrete opportunity for brands adding heat-shielding umbrellas to their assortment. The core requirements are straightforward: a fabric with a certified JIS L 1951 classification of S35 or above, from an accredited testing body, with the test report available for retailer submission. TU307 at S45 meets this with margin above the minimum threshold.
Japan Market Entry: TU307 achieves JUPA-eligible S45 classification. QTEC test report (No. 26FI-080069-1) available for your retailer compliance submission and product labelling support.
Sun-and-Rain Dual Function: TU307 combines heat-shielding performance with water repellency — suited to the all-weather umbrella category growing fastest in Japan, Korea, and Southeast Asia.
Full OEM Customisation: TU307 is available in custom colours with full canopy printing (screen, digital transfer). Handle, frame configuration, and branded packaging are all customisable. MOQ from 500 pcs per style.
Broader Compliance Portfolio: TU307 heat-shielding certification adds to our existing documentation — BSCI, SEDEX, ISO9001, SGS PFAS-free, GRS, EN 71, and Intertek GSV. Full compliance packs available on request. See our certifications page.
Developing a Heat-Shielding Umbrella Program?
Request TU307 fabric samples, the QTEC test report, and OEM production quotes. Available for sun-and-rain and dedicated parasol programs with full customisation from 500 pcs.
Contact Us →Frequently Asked Questions
QTEC Test Report No. 26FI-080069-1 · JIS L 1951 Heat-Shielding Test · Japan Textile Products Quality and Technology Center (一般財団法人 日本繊維製品品質技術センター), Fukui Branch · Test date: September 18, 2026 · Report issued: October 5, 2026 · Product: TU307 Umbrella Fabric (3F AOC) · Client: Huizhou Sishun Umbrella Co., Ltd · Classification: S45 (49%)
