High-Barrier Film Fill & Seal Patent Snapshot 2026
The high-barrier film fill-and-seal space is a compact, mature field of 33 patent families where the top five filers account for 58% of the hundred largest filers’ combined activity and the United States leads as the primary filing jurisdiction. Annual volume has eased from its 2017 peak, though the multi-year window shows modest positive growth, signaling a field that is consolidating rather than expanding.
A concentrated field led by UNIFRAX and Tetra Laval
UNIFRAX I LLC holds the top position with 17 patent records, followed closely by Tetra Laval Holdings & Finance SA with 16, making these two players collectively responsible for roughly half of the field’s documented output among ranked applicants.
The top five filers — UNIFRAX, Tetra Laval, Doubleday Acquisitions, JT International, and Lamart Corp — hold 58% of the ranked applicants visible in this query’ combined total, confirming a strongly two-tier structure: a dense leading cluster and a long tail of single-digit contributors.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | UNIFRAX I LLC | 17 | |
| 2 | TETRA LAVAL HOLDINGS & FINANCE SA | 16 | |
| 3 | Doubleday Acquisitions LLC | 13 | |
| 4 | JT International SA | 10 | |
| 5 | Lamart Corp | 9 | |
| 6 | Tredegar Film Products Corp | 5 | |
| 7 | Cryovac Inc | 4 | |
| 8 | Dairy Crest Limited | 3 | |
| 9 | Scentisphere | 3 | |
| 10 | Rapid Action Packaging | 3 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Fujian Super Tech Advanced Material Co Ltd | 2 | |
| 12 | Tredegar Industries Inc | 2 | |
| 13 | WestRock MWV LLC | 2 | |
| 14 | Whirlpool Corporation | 2 | |
| 15 | Fujifilm Corporation | 2 | |
| 16 | Dai Nippon Printing Co Ltd | 1 | |
| 17 | Toppan Packaging Americas Holdings Inc | 1 | |
| 18 | Toppan Inc | 1 | |
| 19 | Constantia Hueck Folien | 1 | |
| 20 | Qingdao Creek New Environmental Protection Material | 1 |
The leaders’ positions reflect deep, overlapping investment in layered-product laminate technology (B32B), suggesting that core barrier-film construction is well-defended IP territory, and that differentiation must occur at the application or process level for new entrants.
Patent publication typically lags filing by 18–24 months, so activity shown for 2025–2026 is likely under-counted and should not be read as representative of current filing levels. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
How filing activity and technology mix are shifting
Two charts capture the field’s rhythm: annual filing volumes reveal a maturity pattern peaking in 2017, while the IPC composition shows the overwhelming dominance of laminate and packaging classes alongside a set of adjacent branches that remain sparsely addressed.
Annual filing trend
Filings peaked at 9 in 2017 and have since fluctuated at low single-digit levels; the overall multi-year window shows 17% growth, but annual volume has clearly eased from that earlier peak. Years 2025–2026 are subject to publication lag and should be treated as provisional.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B32B (layered products and laminates) is visible in the IPC mix, followed by B65D (containers and packaging) and B65B (packaging and wrapping); together these three classes account for the large majority of records. Branches such as F16L (pipes and pipe fittings), E04B (building structures), and B29C (shaping of plastics) appear at notably lower counts, indicating adjacent but under-served technical territory.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Multi-section core vacuum insulation panels with h…
A multi-layer vacuum insulating panel that includes: a first barrier film having at least one polymeric material layer and; a second barrier film having at least one interior polymeric layer, a metal foil layer, and at least one exterior polymeric layer positioned on the opposite side of the metal foil layer as the at least one interior polymeric layer; a… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Heat sealable, high moisture barrier film and meth… | 95 |
| 2 | Multi-section core vacuum insulation panels with h… | 74 |
| 3 | Fire barrier layer and fire barrier film laminate | 53 |
| 4 | Organic electronic device and method for manufactu… | 39 |
| 5 | Improved self-life vacuum skin packaging | 27 |
| 6 | Barrier film and laminated packaging material comp… | 19 |
| 7 | Wrinkle free geometric opening in a vacuum insulat… | 19 |
| 8 | Laminate structures | 19 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
UNIFRAX I LLC
UNIFRAX I LLC leads the field with 17 patent records, concentrated in B32B laminate processing sub-classes (B32B 37, B32B 27, B32B 38), consistent with a focus on high-performance thermal and fire-barrier film laminates. The collaboration with Lamart Corp (8 joint filings) reinforces a specialization in insulation-related barrier products. Momentum data does not indicate a recent surge, suggesting a stable, well-established portfolio rather than aggressive recent expansion.
patent records: 17Tetra Laval Holdings & Finance SA
Tetra Laval Holdings & Finance SA holds 16 patent records, with primary emphasis on B32B 27 and B32B 7 (laminate compositions and layer bonding) and B65B 51 (heat-sealing in packaging operations), aligning with its liquid food packaging system business. This combination of laminate film construction and heat-seal process claims positions Tetra Laval uniquely at the materials-process interface — a route that differs from UNIFRAX’s thermal-insulation emphasis.
patent records: 16Frequently asked questions
The analysis covers 33 patent families. The applicant ranking is measured in patent records, which can exceed the family count because a single family may be counted in multiple jurisdictions or IPC classes.
UNIFRAX I LLC leads with 17 patent records, followed by Tetra Laval Holdings & Finance SA with 16. Together they account for the largest share of documented output among ranked applicants.
The evidence places the field at the Maturity stage. Annual filings have plateaued near the 2017 peak of 9 records, and while the multi-year window shows 17% growth, annual volume has eased from that earlier high point.
The United States leads with 39 patent records, followed by Europe (EPO) with 24. China and WIPO (PCT) each account for 9 records. This pattern reflects where the visible assignees are headquartered and where commercial protection is prioritized.
Yes. The only documented co-applicant pair in the evidence is UNIFRAX I LLC and Lamart Corp, which have 8 joint filings — a significant partnership relative to the overall corpus size, likely focused on insulation or thermal barrier film products.
B29C (shaping of plastics) at 18 records and F16L (pipes and pipe fittings) at 13 records are the two largest adjacent branches relative to the visible B32B laminate class. E04B (building structures) and B29D (specific plastic articles) are also sparsely covered. These represent areas of lower IP crowding, though they are observations of relative sparsity rather than validated commercial opportunities.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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