Laminate for laser marking

A technology of laser marking and lamination, applied in the direction of replication/marking method, layered product, temperature recording method, etc., to solve the effect of blocking and improving sliding.

Inactive Publication Date: 2008-02-06
TECHNO POLYMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above laminate improves lubricity in the manufacturing process and solves the problem of sticking when stored as a single piece

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] Hereinafter, the present invention will be described in more detail through examples, but the present invention is not limited to the following examples without departing from the gist thereof. In addition, the physical property measurement methods used in each of the following examples are as follows.

[0090]

[0091] (1) Light transmittance:

[0092] A film having the same thickness as the surface layer was prepared, and the measurement was performed with light rays having a wavelength of 600 nm using a spectrophotometer "V-570" manufactured by JASCO Corporation.

[0093] (2) Evaluation method of laminate sheet:

[0094] (i) Evaluation of sheet appearance:

[0095] A sheet having a width of 1000 mm and a length of 5 m was obtained by an extruder, and the appearance of the sheet was observed visually, and the following criteria were used for evaluation.

[0096] [table 3]

[0097] ◯: There is no flow mark or the like, and it is judged that there is no problem.

...

Embodiment 1

[0153] Using an extruder with an inner diameter of 50 mm, at a barrel temperature of 190 to 260 ° C, 50 parts by weight of (A-1) components, 40 parts by weight of (A-3) components, 10 parts by weight of (A-4) components and 0.05 parts by weight of Part (A-5) of the mixture of ingredients was melt-kneaded to obtain pellets (1) mainly used in the middle layer.

[0154] The above-mentioned particles (1) and polyethylene terephthalate resin (B-1) are respectively supplied to a 120mmФ twin-screw extruder with a vent (for layer A) and a 65mmФ twin-screw extruder with a vent Exit machine (for B floor). A matrix compound in which 5% by weight of amorphous silica (average particle diameter: 4 μm) was mixed with respect to the polyethylene terephthalate resin (B-1) was supplied to the extruder for the B layer, and mixed The final particle concentration was 0.2% by weight relative to the polyethylene terephthalate resin (B-1) forming the B layer.

[0155] Make each resin temperature of...

Embodiment 2～4 and comparative example l～3

[0158]Except having used the molding material shown in Table 9, it carried out similarly to Example 1, and obtained the laminated body sheet, and evaluated it. The results are shown in Table 9.

[0159] [Table 9]

[0160] Example

comparative example

1

2

3

4

1

2

3

Surface material

(B-1)

(B-2)

(B-3)

(B-4)

particle 1

(B-5)

(B-1)

middle layer material

particle 1

particle 1

particle 1

particle 1

particle 1

particle 1

(B-1)

Surface thickness (μm)

20

20

20

20

20

20

20

Intermediate layer thickness (μm)

260

260

260

260

260

260

260

Total thickness (μm)

300

300

300

300

300

300

300

Surface layer (thickness 20μm)

light transmittance

(%)

91

90

92

...

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PUM

PropertyMeasurementUnit
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Abstract

A laminate for laser marking useful as a means for applying an indication on the surface of a sheet-like molding of thermoplastic resin by utilizing thermoplastic resin for laser marking skillfully in which slippage is enhanced in a production process and a blocking problem is solved at the time of sheet-shaped storage. The laminate for laser marking where layer B is laminated on at least one side of layer A, the layer A is formed of thermoplastic resin for monochromatic coloring laser marking of white or black, the layer B is formed of transparent thermoplastic resin and has a light beam transmissivity of 70% or above, and the transparent thermoplastic resin of the layer B is subjected to anti-blocking treatment.

Description

technical field [0001] The present invention relates to a laminate for laser marking. Background technique [0002] Conventionally, printing methods such as screen printing have been used to apply indications (characters, figures, symbols, combinations of these, etc.) on the surface of thermoplastic resin sheet-shaped molded products such as prepaid cards. However, when the printing method is used, since each display must be made into a plate, the cost is high, and not only a long production day is required, but also a defective product caused by unevenness of the plate or leakage of printing ink during printing , there is a serious disadvantage that it has to be discarded because of the difficulty of recycling. [0003] On the other hand, thermoplastic resins for monochromatic color-developing laser marking that can be applied with white or black monochromatic marking on the surface of the resin by laser irradiation have recently been proposed (for example, Patent Document...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/26B32B27/00B32B27/30B32B27/36
CPCB32B27/00B41M5/267Y10T428/24802B32B27/30B32B27/36B41M5/26
Inventor 川上和美栗本英幸小谷智行高平和典
Owner TECHNO POLYMER CO LTD
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