Mono-Material Layer Adhesion Patent Landscape 2026
Mono-material layer adhesion is a highly concentrated niche, with a single Japanese incumbent holding the dominant share of a 48-family corpus now easing back from its 2020 peak. Activity is centered on laminated packaging applications filed primarily in Japan, with limited international reach to date.
Dai Nippon Printing commands a structurally dominant position
Dai Nippon Printing Co Ltd leads the corpus by a wide margin, holding 34 patent families — more than the remaining ranked applicants combined. Nova Chem (Int) SA follows distantly with 4 patent families, and Uflex Ltd holds 3, confirming a steep drop-off after the top position.
The top five filers collectively account for 96% of the hundred largest filers’ combined total, indicating extreme concentration. There is no effective second tier; challengers and new entrants each hold single-digit family counts.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Dai Nippon Printing Co Ltd | 34 | |
| 2 | Nova Chem (Int) SA | 4 | |
| 3 | Uflex Ltd | 3 | |
| 4 | IND Termoplastica Pavese SpA | 2 | |
| 5 | Unilever Global IP Ltd | 2 | |
| 6 | Toppan Holdings Inc | 1 | |
| 7 | Guala Pack SpA | 1 |
Dai Nippon Printing’s dominance reflects early and sustained commitment to mono-material laminate structures for food and retort packaging. Challengers entering now face a dense prior-art thicket in B32B and B65D classifications controlled almost entirely by one entity.
Filings from 2024–2026 are subject to standard publication lag and should be treated as provisional counts; the apparent 2024 recovery may partly reflect delayed publication of earlier-priority applications. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity peaked in 2020 and has since eased; laminates dominate the technology mix
Two charts together reveal a field that surged around 2019–2021 and has since contracted in annual output, while remaining technologically concentrated in a small set of polymer laminate classifications.
Annual filing trend
Filings were negligible before 2019, spiked to 16 families in 2020, then fell sharply. The 2024 uptick (10 families) warrants caution: publication lag means recent-year counts are likely understated and should not be read as a confirmed recovery.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B32B (Layered products and laminates) spans the entire corpus, while B65D (Containers and packaging) is nearly co-extensive, confirming that essentially all work targets packaging end-use. Polymer composition (C08L), processing (C08J), and addition polymerization (C08F) branches each account for a small minority, pointing to sparse activity in upstream materials science.
↗ 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.
Polyester based monomaterial film as "sustainable …
The present invention discloses a monomaterial heat-sealable Bi-axially oriented Polyester film (100). The film (100) includes a skin layer (102) modified with Co-Polyester Alloys containing amorphous and semi-crystalline elastomeric co-polyesters having a heat seal strength up to 3500 gf/in. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Laminate and packaging container | 19 |
| 2 | Laminate, and pouch for retort or boiling | 16 |
| 3 | Laminate and packaging container | 13 |
| 4 | Laminate and packaging container | 12 |
| 5 | Substrate, vapor-deposited substrate, laminate and… | 11 |
| 6 | Laminate, and pouch for retort or boiling | 9 |
| 7 | Thermally laminated polyethylene-based "monomateri… | 8 |
| 8 | Substrate for forming vapor-deposited film, vapor-… | 6 |
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.
What the patent structure means for R&D investment decisions
The combination of extreme concentration, past-peak lifecycle, and narrow geographic coverage shapes both the risk profile and the available white space for new entrants and incumbents alike.
Field is in decline from its 2020 peak
The lifecycle stage is classified as Decline, driven by annual filings easing back from the 2020 peak of 16 families. The multi-year window still records meaningful cumulative output, but the directional signal for new foundational filing activity is downward. Teams should evaluate whether the core laminate-adhesion problem is considered solved by the dominant incumbent or whether regulatory and recyclability pressures will re-ignite filings.
Lifecycle: DeclineOne incumbent controls the prior-art landscape
With the top five filers holding 96% of the hundred largest filers’ combined total — and the leader alone holding 34 of 48 total families — the freedom-to-operate risk is high for anyone targeting the same B32B/B65D laminate structures. Challengers Nova Chem (Int) SA (4 families) and Uflex Ltd (3 families) have begun staking positions, but the structural gap is large. A design-around or upstream materials approach may be more viable than direct competition in the core laminate space.
High concentrationUnilever entities show internal co-filing; no cross-firm alliances observed
The most active co-filing relationships in the corpus are internal to the Unilever group: Unilever IP Holdings Ltd, Unilever Global IP Ltd, and Conopco Inc each appear in two co-filed families. No cross-firm or academic collaboration is evident in the evidence. This suggests that large brand owners are self-funding exploratory work rather than partnering with material suppliers, leaving a potential ecosystem gap for joint development agreements.
Intra-group onlyJapan-centric filing with limited international projection
Japan accounts for 35 patent records, reflecting Dai Nippon Printing’s home-office strategy. India and WIPO (PCT) each record 4, while Europe (EPO) holds 2 and the United States holds only 1. This narrow international footprint means that outside Japan — particularly in North America and continental Europe — the freedom-to-operate landscape is comparatively open, though the underlying technology may still be covered by PCT-derived national phases not yet fully published.
Japan-dominantGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Unilever IP Holdings Ltd | Unilever Global IP Ltd | 2 |
| Unilever IP Holdings Ltd | CONOPCO INC | 2 |
| Unilever Global IP Ltd | CONOPCO INC | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Dai Nippon Printing leads; challengers are new entrants from chemicals and converting
The competitive map divides into a single dominant incumbent with deep laminate-packaging coverage and a small cluster of new entrants approaching the problem from polymer chemistry and film-converting angles.
Dai Nippon Printing Co Ltd
Dai Nippon Printing holds 34 patent families, concentrated entirely in B32B 27 (layered polymer laminates), B65D 65 (packaging containers), and B32B 9. The most-cited patents in the corpus — covering laminate-and-packaging-container and retort/boiling pouch constructions — are attributable to this entity. Momentum is sharply negative (▼ –76% in recent filings versus the prior period), consistent with the field’s post-peak decline, though the installed prior-art position remains structurally decisive.
patent families: 34Nova Chem (Int) SA
Nova Chem (Int) SA holds 4 patent families and is a new entrant by momentum classification (▲ new entrant), indicating no prior-period baseline. Its technology focus is differentiated from the leader: B32B 27 is shared, but C08F 210 and C08F 4 (addition polymerization of vinyl-type monomers) signal an upstream resin-chemistry approach to achieving mono-material adhesion, which could underpin a distinct freedom-to-operate position.
patent families: 4| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Dai Nippon Printing Co Ltd | 6 | ▼ -76% |
| Nova Chem (Int) SA | 3 | ▲ new entrant |
| Uflex Ltd | 1 | ▲ new entrant |
| Toppan Holdings Inc | 1 | ▲ new entrant |
Under-served branches in polymer science adjacent to the dominant laminate core
The dominant B32B/B65D laminate-packaging cluster absorbs most filings; several polymer-science and processing branches remain comparatively sparse and may represent areas where incremental investment could differentiate.
C08J · Polymer processing and solutions
C08J holds only 5 patent records, representing 5% of the branch distribution. Polymer processing routes — including surface treatment, film formation, and solution processing — are directly relevant to achieving interlayer adhesion without tie layers in mono-material structures. The sparse filing count, combined with plausible technical value for recyclability-driven packaging mandates, suggests this branch is under-examined relative to the problem it addresses. An entry path exists through surface-functionalization or compatibilization process patents that complement rather than replicate existing B32B laminate claims.
Search this in Eureka →B29C · Shaping of plastics
B29C accounts for only 2 patent records, making it the sparsest non-index branch in the corpus. Shaping processes — co-extrusion, blow molding, and thermoforming — are critical enablers for mono-material structures because adhesion performance is highly sensitive to processing conditions. The absence of meaningful filing activity here may reflect incumbents treating process know-how as a trade secret rather than a patentable asset, or a genuine gap in process-level intellectual property. Teams with co-extrusion or in-line bonding expertise could stake a differentiated position with limited prior-art conflict.
Search this in Eureka →How leaders differ by technology route across IPC branches
Route coverage across the main technology branches in the current evidence set.
| Player | B32B 27 · Layered products & laminates | B65D 65 · Containers & packaging | B32B 9 · Layered products & laminates | C08L 23 · Polymer compositions | B32B 7 · Layered products & laminates |
|---|---|---|---|---|---|
| Dai Nippon Printing Co Ltd | Strong · 34 | Strong · 34 | Moderate · 12 | Emerging · 2 | Emerging · 3 |
| Nova Chem (Int) SA | Strong · 4 | Absent | Absent | Strong · 4 | Absent |
| Uflex Ltd | Strong · 3 | Moderate · 1 | Absent | Absent | Moderate · 1 |
| IND Termoplastica Pavese SpA | Strong · 2 | Absent | Absent | Absent | Strong · 2 |
| Unilever Global IP Ltd | Strong · 2 | Absent | Absent | Strong · 2 | Absent |
| Unilever IP Holdings Ltd | Strong · 2 | Absent | Absent | Strong · 2 | Absent |
Frequently asked questions
The corpus contains 48 patent families in scope across the filing window analyzed.
Dai Nippon Printing Co Ltd is the clear leader with 34 patent families, concentrated in layered-polymer laminate and packaging-container classifications.
No. The lifecycle stage is classified as Decline, with annual filings easing back from a peak of 16 families in 2020. The most recent years show reduced output, consistent with a post-peak contraction, though publication lag affects the accuracy of 2024–2026 counts.
Japan dominates with 35 patent records, followed by India and WIPO (PCT) at 4 each. Europe (EPO) holds 2 records and the United States holds 1, indicating limited international projection of the core IP beyond Japan.
The only co-filing activity identified is internal to the Unilever group, between Unilever IP Holdings Ltd, Unilever Global IP Ltd, and Conopco Inc, each pair sharing 2 co-filed families. No cross-firm or industry-academic partnerships are evident in the evidence.
C08J (Polymer processing and solutions, 5 records), C08F (Addition polymers, 4 records), and B29C (Shaping of plastics, 2 records) are the sparsest branches adjacent to the dominant B32B laminate core. These processing and chemistry routes are technically relevant to mono-material adhesion but remain relatively uncharted in the patent record.
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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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