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In-mold labeling method and labeled products

a labeling method and label technology, applied in the field of in-mold labeling and labeling molded products, can solve the problems of unattractive appearance of articles, damage to adhesively secured labels, and inability to meet the requirements of in-mold labeling procedures,

Inactive Publication Date: 2005-01-13
CCL LABEL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesively secured label tends to be damaged during use and / or the label adheres poorly and may be partially or completely or removed from the article during use thereby giving the article an unattractive appearance.
In-mold labeling procedures, however, are not without their own difficulties.
For example, in-mold labeling is known to have problems with displacement of the label during the molding process due to pressure.
Another problem observed in in-mold labeling is the distortion and / or “floating” of the label.
Distortion also can be caused by the pressure and the melting points of the material.
Yet another problem is that when the label “floats”, the label, in part or in whole, displaces into the injection fill material thus exposing little or no surface of the label on the surface of the substrate.

Method used

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  • In-mold labeling method and labeled products
  • In-mold labeling method and labeled products

Examples

Experimental program
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example i

This example illustrates the preparation of a white, surface-printed in-mold label film. The facestock utilized in this example is a white opaque clay modified polypropylene film available from HOP Industries. The film thickness is about 7.5 mil. The upper surface of the facestock is corona treated, and an ink adhesion promoting layer is applied to the corona treated surface at a coating weight of about 1.1 g / m2 of the facestock via an anilox roll. The adhesion promoting material is CLBO-4275 F-Prokote Primer (a product of Sun Chemical Corp. identified as a solvent based primer). The adhesion promoting material is cured in an oven at a temperature of 40-50° C.

A multi-colored ink or print layer providing a pictorial design in combination with a printed message is applied over the adhesion promoting layer. The print layer is applied using a sequence of three anilox rolls. The following inks are used: Roll 1: Yellow 116 ink (a UV curable ink provided by Daw Ink) Roll 2: Red 186 in...

example ii

This example illustrates the preparation of a clear, sub-surface printed label film construction. A clear polymer facestock film identified as Fasclear which is available from Avery Dennison Engineered Films Division, Avery Dennison Corp. is utilized in this example. The film has a thickness of about 6 mils. The lower surface of the facestock film is corona treated, and an ink adhesion promoting layer is applied (1.1 g / m2) to the corona treated lower surface of the facestock via an anilox roll. The adhesion promoting material is CLBO-4275 F-Prokote Primer. The adhesion promoting material is cured in an oven at a temperature of 40-50° C.

A multicolored ink or graphics print layer providing a pictorial design in combination with a printed message is applied under the adhesion promoting layer. The ink or graphics print layer is applied using a sequence of three anilox rolls. The inks used in this example are the same as used in Example I. Each ink application is UV cured prior to the...

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Abstract

The invention relates to an in-mold labeling method, and to molded plastic articles having an in-mold label as described herein. In one embodiment of the invention, the in-mold label film comprises: (A) a polymer facestock having a printable upper surface and a lower surface, (B) a print layer having an upper surface and a lower surface wherein the lower surface of the print layer is in contact with and adhered to the upper surface of the facestock, and (C) an adhesive layer having an upper surface and a lower surface wherein the lower surface is in contact with and adhered to the upper surface of the print layer.

Description

TECHNICAL FIELD OF THE INVENTION This invention relates to methods of in-mold labeling, and to labeled molded products. BACKGROUND OF THE INVENTION It is often desirable to apply the labels, decals, logo plates, badges, graphics, or insignias (hereinafter collectively referred to as “labels”) to an exterior surface of an article. One practice is to adhesively secure the label to the article after the article has been prepared. However, the adhesively secured label tends to be damaged during use and / or the label adheres poorly and may be partially or completely or removed from the article during use thereby giving the article an unattractive appearance. It also is known that a label can be placed inside a mold cavity to in-mold the label to a thermoplastic article. For example, in an injection molding procedure, a label is placed in a mold cavity, and a thermoplastic resin is then injected into the mold cavity and against the label. Upon cooling, the label becomes embedded in the ...

Claims

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Application Information

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IPC IPC(8): B29C45/14
CPCB29C45/14811B29C2045/14918Y10T428/14B29K2995/002B29K2995/0026B29K2715/006
Inventor MILLER, DALESANDT, RICHARD L.EASTEP, SCOTT
Owner CCL LABEL INC
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