Marking paper products
US-9342715-B2 · May 17, 2016 · US
Marking plastic-based products
US10410453B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10410453-B2 |
| Application number | US-201514897958-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 7, 2015 |
| Priority date | Jul 8, 2014 |
| Publication date | Sep 10, 2019 |
| Grant date | Sep 10, 2019 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Methods of marking plastic-based products and marked plastic-based products are provided. Some methods include irradiating the product to alter the functionalization of the plastic. In general, the present disclosure features methods of marking substrates, e.g., substrates including plastics, such as plastic-based products, such as polymer banknotes. Such plastics can be rigid or flexible, e.g., elastomeric. Such plastics can be thermoplastic or thermosets. In some cases, the products are marked by irradiating plastic-based materials, e.g., sheet materials, under conditions that alter characteristics of the irradiated plastic.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of making a marked plastic-based product, the method comprising irradiating an exposed surface of a plastic sheet material with at least 0.10 MRad of ionizing radiation under conditions selected to alter the characteristics of at least an area of the exposed surface of the substrate, the exposed surface consisting essentially of plastic; and before or after irradiating, utilizing the sheet material to produce the plastic-based product, wherein the product is selected from the group consisting of polymer banknotes, identification cards, passports and credit cards. 2. The method of claim 1 wherein the dose of ionizing radiation is at least 0.25 MRad. 3. The method of claim 1 wherein irradiating comprises irradiating with electron beam radiation. 4. The method of claim 3 wherein the electron beam has an energy of at least 0.25 MeV. 5. The method of claim 1 wherein irradiating is performed under conditions selected to increase the number of carboxylic acid groups present in the substrate. 6. The method of claim 1 further comprising quenching the irradiated substrate. 7. The method of claim 6 wherein quenching is performed in the presence of a gas selected to react with radicals present in the irradiated substrate. 8. The method of claim 1 wherein only a portion of the substrate is irradiated. 9. The method of claim 6 wherein only a portion of the substrate is quenched. 10. The method of claim 1 wherein the substrate comprises an olefin. 11. The method of claim 10 wherein the olefin comprises biaxially oriented polypropylene.
Assignees
Inventors
Classifications
involving markings the properties of which are altered from original properties · CPC title
with compositions not containing macromolecular substances · CPC title
Marking · CPC title
by wave energy or particle radiation · CPC title
bi-axially · CPC title
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Frequently asked questions
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- What does patent US10410453B2 cover?
- Methods of marking plastic-based products and marked plastic-based products are provided. Some methods include irradiating the product to alter the functionalization of the plastic. In general, the present disclosure features methods of marking substrates, e.g., substrates including plastics, such as plastic-based products, such as polymer banknotes. Such plastics can be rigid or flexible, e.g.…
- Who is the assignee on this patent?
- Xyleco Inc
- What technology area does this patent fall under?
- Primary CPC classification G07D7/12. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 10 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).