Unlock instant, AI-driven research and patent intelligence for your innovation.

Transparent laser marking sheet, laminate, and method for laser marking

A laser marking and transparent technology, applied in the direction of copying/marking methods, chemical instruments and methods, coatings, etc., can solve the problems of decreased reliability of identity certificates, obstacles to talent movement, etc., and achieves excellent transparency, high versatility, Good adhesion effect

Active Publication Date: 2016-07-20
MITSUBISHI CHEM CORP
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, as long as a third party other than the state (or state agency) can easily falsify or forge personal information, the reliability of identification will decrease
Then, it is likely to hinder the development of international exchanges and the movement of human resources around the world

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transparent laser marking sheet, laminate, and method for laser marking
  • Transparent laser marking sheet, laminate, and method for laser marking
  • Transparent laser marking sheet, laminate, and method for laser marking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0252] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to this. In addition, various evaluations and measurements in Examples and Comparative Examples were implemented by the following methods.

[0253] [1] Transparency of transparent laser marking sheet:

[0254] For the transparent laser marking sheets used in Examples 1 to 5 and Comparative Examples 1 to 6, the total light transmittance of the sheets was measured using a spectrophotometer (manufactured by Macbeth, trade name "EYE7000"). As evaluation, evaluation was performed based on the following criteria.

[0255] "Evaluation Criteria"

[0256] ⊚: The total light transmittance is 80% or more, and the total light transmittance is extremely good.

[0257] ◯: The total light transmittance is 60% or more and less than 80%, and the total light transmittance is good.

[0258] X: The total light transmittance is less than 60%, and the total light transmittance is p...

manufacture example 1

[0280] (Manufacturing Example 1) Substrate sheet A1 (single-layer sheet):

[0281] Use polycarbonate resin (manufactured by Idemitsu Kosan Co., Ltd., trade name "TARFLONFN2500A", melt volume ratio=8cm 3 / 10min) 100 parts by mass, 0.0015 parts by mass of carbon black (#10 manufactured by Mitsubishi Chemical Corporation, average particle diameter 75nm, DBP oil absorption 86ml / 100gr) as an energy absorber for absorbing laser light energy, and 0.0015 parts by mass as a phenolic antioxidant 0.1 parts by mass of n-octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate (manufactured by Ciba Specialty Chemicals, trade name "IRGANOX1076") as an oxidizing agent and 2 -(2'-Hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole (manufactured by Ciba Specialty Chemicals, trade name "Tinuvin327") 0.2 parts by mass, extruded through a T-die A single-layer substrate sheet A1 (single-layer sheet) having a thickness of 100 μm was obtained.

manufacture example 2

[0282] (Manufacturing Example 2) Substrate sheet A2 (multilayer sheet):

[0283] In non-crystalline polyester resin (manufactured by Eastman Chemical Co., trade name "EasterGN071", EG / CHDM (ethylene glycol unit / 1,4-cyclohexanedimethanol unit, the same below) = 70 / 30 mol% ) to 100 parts by mass of calcium stearate as a lubricant was blended as a surface layer of 0.1 parts by mass. Use polycarbonate resin (manufactured by Idemitsu Kosan Co., Ltd., trade name "TARFLONFN2500A", melt volume ratio=8cm 3 / 10min) 100 parts by mass, 0.0015 parts by mass of carbon black (#10 manufactured by Mitsubishi Chemical Corporation, average particle diameter 75nm, DBP oil absorption 86ml / 100gr) as an energy absorber for absorbing laser light energy, and 0.0015 parts by mass as a phenolic antioxidant 0.1 parts by mass of (n-octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate (“IRGANOX1076” manufactured by Ciba Specialty Chemicals) of the oxidizing agent and 2-( 0.2 parts by mass of 2'-hyd...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided is a transparent laser marking sheet which has satisfactory adhesiveness to, for example, sheets constituting electronic passports, plastic cards, etc., and is highly versatile and on which high-contrast clear characters, figures, symbols, or information can be laser-marked. The transparent laser marking sheet comprises: a base sheet (2) comprising a single-layer sheet constituted of a transparent polycarbonate resin composition containing a laser light energy absorber or a base sheet comprising a multilayer sheet that comprises skin layers constituted of a thermoplastic resin and a core layer constituted of a transparent polycarbonate resin composition containing a laser light energy absorber; and an adhesive layer (3) disposed on at least one surface thereof, the layer (3) being constituted of a transparent, heat-sensitive adhesive that comprises a polyester resin.

Description

technical field [0001] The present invention relates to a transparent laser marking sheet, a laminate and a laser marking method. Background technique [0002] Recently, with the development of international exchanges and the active flow of human resources, ID cards that record personal information, or so-called identity certificates (certificates of birth) such as passports, etc., can be used to identify individuals and prove their identity and family background. The current situation is that the importance of identity certificates issued by public institutions and highly reliable organizations is increasing. [0003] In addition, after the terrorist incidents that occurred frequently around the world in September 2001, countries adopted measures such as strict control of entry and exit management. For example, ICAO (International Civil Aviation Organization), a specialized agency of the United Nations, has begun to formulate standards in various countries and introduce th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/26B32B9/00B32B27/36B42D25/24B42D25/41
CPCB32B7/12B32B27/08B32B27/365B32B2255/10B32B2255/26B32B2264/102B32B2264/107B32B2264/108B32B2307/412B32B2307/554B32B2307/75B32B2425/00B41M5/267B42D25/23B42D25/24B42D25/351B42D25/387B42D25/41B42D25/47B32B27/36C09J167/00
Inventor 阪上俊规桥本章渡边崇志
Owner MITSUBISHI CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com