Roll material for manufacturing electromagnetic induction sealing liner and sealing liner
US-2024424770-A1 · Dec 26, 2024 · US
Laminate and packaging bag
US2026077576A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2026077576-A1 |
| Application number | US-202519396104-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 20, 2025 |
| Priority date | Jul 29, 2019 |
| Publication date | Mar 19, 2026 |
| Grant date | — |
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Abstract
Official abstract text for this publication.
A laminate including a first base material layer, a second base material layer, and a sealant layer in this order, wherein all three layers include a polyolefin film; the polyolefin film of the first base material layer or the second base material layer includes an inorganic oxide layer on at least one surface thereof; and each of the first base material layer, the second base material layer, and the sealant layer has a heat shrinkage rate, in a travel direction after heating at 120° C. for 15 minutes, which satisfies the following inequalities: heat shrinkage rate of the second base material layer≤5% (Inequality 1); heat shrinkage rate of the second base material layer≥heat shrinkage rate of the first base material layer (Inequality 2); and, heat shrinkage rate of the second base material layer≥heat shrinkage rate of the sealant layer (Inequality 3).ws
First claim
Opening claim text (preview).
What is claimed is: 1 . A laminate comprising a first base material layer, a second base material layer, and a sealant layer in this order, wherein the first base material layer, the second base material layer, and the sealant layer all include a polyolefin film; the sealant layer consists of a polyolefin and optionally, at least one of an antioxidant and a light stabilizer; wherein the laminate further comprises (a) an adhesive layer in directed contact with a surface of the polyolefin film of one of the first base material layer and the second base material layer; (b) an inorganic oxide layer in direct contact with the adhesive layer; and (c) a gas barrier coating layer in direct contact with the inorganic oxide layer; the gas barrier coating layer is formed from a composition containing at least one selected from the group consisting of a hydroxyl group-containing polymer compound, a metal alkoxide, a silane coupling agent, and hydrolyzates thereof, each of the first base material layer, the second base material layer, and the sealant layer has a heat shrinkage rate, in a travel direction (MD direction) after heating at 120° C. for 15 minutes, which satisfies the following inequalities: Heat shrinkage rate of the second base material layer ≤ 5 % ( Inequality 1 ) Heat shrinkage rate of the second base material layer ≥ Heat shrinkage rate of the first base material layer ( Inequality 2 ) Heat shrinkage rate of the second base material layer ≥ Heat shrinkage rate of the sealant layer , ( Inequality 3 ) wherein Heat shrinkage rate (%)=(Travel-direction length before heating−Travel-direction length after heating)/Travel-direction length before heating×100, wherein the sealant layer consists of the polyolefin and the antioxidant; the sealant layer consists of the polyolefin and the light stabilizer; or the sealant layer consists of the polyolefin, the antioxidant and the light stabilizer. 2 . The laminate of claim 1 , wherein the heat shrinkage rates satisfy the following inequalities: Heat shrinkage rate of the second base material layer
Assignees
Inventors
Classifications
Shrinkable · CPC title
Heat-shrinkability · CPC title
Bags · CPC title
Non-permeable · CPC title
Heat sealable · CPC title
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Frequently asked questions
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- What does patent US2026077576A1 cover?
- A laminate including a first base material layer, a second base material layer, and a sealant layer in this order, wherein all three layers include a polyolefin film; the polyolefin film of the first base material layer or the second base material layer includes an inorganic oxide layer on at least one surface thereof; and each of the first base material layer, the second base material layer, a…
- Who is the assignee on this patent?
- Toppan Inc
- What technology area does this patent fall under?
- Primary CPC classification B32B27/32. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Mar 19 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).