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Labeling adhesive and use thereof

A technology for adhesives and labels, applied in the direction of adhesive types, adhesives, film/sheet adhesives, etc., can solve problems such as insufficient wet adhesion, long setting or curing time, and long drying time

Inactive Publication Date: 2007-08-15
NAT STARCH & CHEM INVESTMENT HLDG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, although pre-applied adhesive labels that are rewettable with water are known, these labels are of great use in high-speed labeling applications, especially for labeling glass and plastic bottles with paper, plastic, metallized or other types of labels. Still not feasible due to long drying times, long set or cure times and / or insufficient wet tack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] An adhesive was prepared comprising 57 parts polyvinyl acetate homopolymer, 8.5 parts polyvinyl alcohol, 3.5 parts wetting agent, 0.1 part preservative and 0.1 part surfactant and 30.8 parts water. The adhesive had a viscosity of 1,200 centipoise, a solids content of 44%, and a pH of 5.5. The adhesive was used to coat the surface of a 3 mil paper substrate and allowed to air dry completely. The substrate to which the adhesive has been previously applied is rewetted, and immediately after rewetting a bond is formed by contacting the wetted adhesive present on the substrate with a second substrate. Allow the bonded substrates to sit at room temperature for one hour. Bond strength and % fiber test were tested. 100% fiber tearing was observed.

Embodiment 2

[0060] 52% water, 0.2% defoamer, 0.9% zinc carbonate and 12% urea (for example in a vessel with a rotating mixer) are mixed well, then 7.8% Collys Br and 23.5% Dexylose 1 231 are added. The mixture was then heated to 72°C and held at this temperature for 20 minutes. The mixture was then cooled to 65°C and 0.6% ammonium acetate was added. Then 3% bone glue was added between 60-65°C and the final mixture was cooled to room temperature. A sample of the adhesive was applied to a clear plastic label and allowed to dry. The adhesive that had been previously applied to the label was remoistened and a bond was formed immediately after rewetting by bringing the wet adhesive present on the substrate into contact with the surface of the glass jar. Allow the bonded substrates to sit at room temperature for one hour. The adhesive exhibits good wet tack. The dried adhesive was substantially transparent and the glass substrate could be seen through the dried adhesive.

Embodiment 3

[0062] Mix 49.8 parts water and 10 parts polyvinyl alcohol (for example in a container with a rotating stirrer). The mixture was then heated to 90°C and maintained at this temperature for 1 hour. The mixture was then cooled to room temperature, and then 40 parts of polyvinyl acetate homopolymer, 0.1 part of preservative and 0.1 part of surfactant were added and mixed uniformly.

[0063] The polyvinyl alcohol cookup can be prepared separately and added as an intermediate if desired.

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PUM

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Abstract

The invention relates to a labels, labeled containers and method of labeling a container wherein the label comprises a pre-applied adhesive that is reactivated with moistenable.

Description

technical field [0001] The present invention relates to the field of adhesives. More specifically, the present invention relates to pre-applied or pre-glued labels and their use in labeling applications. Background technique [0002] Adhesives that can be applied to a substrate and then reactivated (eg, by pressure, moisture, and / or heat) to bond the substrate to a second selected substrate have many advantages. A major advantage is that the end user of the adhesive does not need to devote time and resources to adhesive related issues (eg, selection, handling, troubles shooting, application, removal, storage, etc.). [0003] A water-rewettable adhesive is a dry adhesive composition that develops adhesion when wetted with water. Pre-applied water rewettable adhesives are well known and practiced in the art. These adhesives are commonly used in postage stamps, wallpaper, tapes, labels and envelope seals, among others. Water rewettable adhesive compositions are described, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F3/10C09J131/04C09J129/04
CPCY10T428/283C09J2203/334C08J5/127C09J2429/00C09J2400/283C09J7/0246C09J2201/614G09F3/10C09J2201/28Y10T428/2878C09J2431/00C09J7/042C09J7/38C09J7/22C09J7/21C09J7/32C09J2301/306C09J2301/204
Inventor T·帕基耶S·J·史密斯
Owner NAT STARCH & CHEM INVESTMENT HLDG CORP
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