CN108717824B

CN108717824B - Aluminum crystal label and preparation method thereof

Info

Publication number: CN108717824B
Application number: CN201810357392.5A
Authority: CN
Inventors: 季永明
Original assignee: Jiaxing Haoneng Technology Co ltd
Current assignee: Jiaxing Haoneng Technology Co ltd
Priority date: 2018-04-20
Filing date: 2018-04-20
Publication date: 2021-04-20
Anticipated expiration: 2038-04-20
Also published as: CN108717824A

Abstract

The invention relates to the technical field of aluminum crystal labels, in particular to an aluminum crystal label and a preparation method thereof. The aluminum crystal label provided by the invention comprises a gloss oil layer, a concave-convex printing layer, an aluminized paper layer and a bottom coating from top to bottom; the aluminized paper layer comprises an aluminized PET layer, a gluing layer, a raw paper layer and a back coating from top to bottom; the aluminum-free surface of the aluminum-plated PET layer is bonded with the raw paper layer through the gluing layer; the aluminized PET layer is a bidirectional thermal shrinkage PET vacuum aluminized film; the shrinkage rate of the bidirectional heat-shrinkable PET vacuum aluminized film is 50-70 ℃, the longitudinal shrinkage rate is 30-45%, and the transverse shrinkage rate is 55-80%. The aluminum crystal label provided by the invention has the advantages of paper product labels and plastic labels, has the function of continuously labeling single paper labels after printing the labels, does not need to replace a labeling machine, and can realize the exchange of new and old products on a labeling machine of an assembly line. After labeling, no bubbling, no wrinkling and no label-grasping mark appear, and the label is an ideal middle-high end label and is particularly suitable for beer companies in southern wet climate.

Description

Aluminum crystal label and preparation method thereof

Technical Field

The invention relates to the technical field of aluminum crystal labels, in particular to an aluminum crystal label and a preparation method thereof.

Background

The processing space of beer manufacturers is relatively large, and the temperature and humidity of a production field, particularly in plum rain season, cannot be guaranteed, and outdoor temperature and indoor temperature and humidity are consistent, so that bubbling is easy to occur after labeling, and the label surface is not flat and has defects. The beer is sold and stored in various modes, the beer is packaged in a plastic basket and a packaging box, the sealing and temperature and humidity control of a general beer storage warehouse are lagged behind, a beer label is easy to wrinkle after absorbing moisture, and the appearance image of the label is damaged greatly; restaurants, bars and families like to drink ice beer and can put the ice beer into a refrigerated cabinet or directly put the ice beer into ice water to cool, so that the pleasant feeling of ice is achieved, labels on the beer taken out of the refrigerated cabinet are wrinkled and marked marks are obvious, the marked and marked marks are especially obvious when the beer is taken out of the ice water, the marks are seriously removed through the extension of the marked and marked marks, and the appearance quality is seriously damaged.

The three problems of bubbling, wrinkling and mark palm print exist on the beer label all the time, most of the beer industry in China in the early years is a low-end route, drinking and selling are relatively weak, and the requirements of people under eyes on counterfeiting and appearance quality are continuously improved, so that the three stubborn diseases of bubbling, wrinkling and mark palm print on the beer label are fatal injuries which damage the appearance, the earliest international brands are processed into pressure-sensitive adhesive products by using PET as a label material to be pasted on beer bottles, the three problems are really solved, but new problems are formed, and the price is higher 1; 2, labeling is slow.

Disclosure of Invention

In order to solve the technical problems, the invention provides an aluminum crystal label, a beer bottle using the aluminum crystal label can be recycled, and the canning speed is more than 4.5 ten thousand bottles per hour.

The aluminum crystal label provided by the invention comprises a gloss oil layer, a concave-convex printing layer, an aluminized paper layer and a bottom coating from top to bottom; the bottom coating liquid with proper amount can well prevent the aluminum crystal label from being sensitive to the environmental temperature and humidity before the aluminum crystal label is not pasted on the beer bottle.

The aluminized paper layer comprises an aluminized PET layer, a glue coating layer, a raw paper layer and a back coating from top to bottom; the aluminum-free surface of the aluminum-plated PET layer is bonded with the raw paper layer through the gluing layer; the aluminized PET layer is a bidirectional thermal shrinkage PET vacuum aluminized film; the shrinkage rate of the bidirectional heat-shrinkable PET vacuum aluminized film is 50-70 ℃, the longitudinal shrinkage rate is 30-45%, and the transverse shrinkage rate is 55-80%. Because beer bottles need to be reused, the canning speed is more than 4.5 million bottles per hour, if the base paper is directly used as a label material, the beer labels are easy to wrinkle or directly fall off after absorbing moisture (placed in a refrigerated cabinet or directly placed in ice water for cooling), and the appearance image damage of the labels is large; however, the PET vacuum aluminum-plated film has poor adhesion with a glass bottle, and is easy to generate poor bubbling effect, and cannot meet the label requirement of middle-high-end beer, so that the PET vacuum aluminum-plated film is compounded with the raw paper layer, and the raw paper layer is adhered to glass, so that the problem that the aluminum crystal label is easy to generate bubbling and wrinkling is solved. If the raw paper layer is compounded with the common PET vacuum aluminized film, the label is difficult to remove, and the requirement of beer bottle recovery cannot be met; if the original paper layer and the one-way thermal shrinkage PET vacuum aluminized film are compounded, the label is easily shrunk into a slender type when being subjected to film removal, and the slender type is drifted into a beer bottle, so that the label removal efficiency is greatly reduced, and the requirements of a brewery cannot be met.

The glue of the glue coating layer of the aluminum-plated paper layer comprises the following components in percentage by weight: 8-12% of curing agent, 1-2% of polyacrylic acid sodium salt, 2-4% of phenolic resin, 40-50% of ethyl acetate and the balance of water. Because the adhesiveness of the two-way heat-shrinkable PET vacuum aluminized film and the high-end beer base paper layer material is poor, a stable composite layer is difficult to form. Thus, when the glass bottle is recycled, the composite layer is easy to be layered, and the recycling efficiency of the glass bottle is low. The glue provided by the invention takes the sodium polyacrylate salt as a wetting agent of the glue and can form good composite bonding performance with phenolic resin, and the bidirectional thermal shrinkage PET vacuum aluminized film and the high-end beer raw paper layer material can be well compounded together.

Wherein the base paper material of the aluminized paper layer is 25-35 g of base paper with medium wet strength; the wet tensile force of the base paper layer material is more than or equal to 8 in the longitudinal direction and more than or equal to 4 in the transverse direction.

The base paper layer material of the aluminized paper layer and the aluminized PET layer material are mixed according to the weight ratio of 1: 0.9-1.1 compounding. In consideration of cost and labeling speed, the weight ratio of 1: the compound effect is best between 0.9 and 1.1.

The coating of the back coating comprises the following components in percentage by weight: 1-8% of carboxymethyl cellulose, 8-15% of glycerol, 0.3-0.8% of lubricating humectant and 83-90% of water. The back coating soaks to make the aluminized paper layer more flat.

The coating of the base coat comprises the following components in percentage by weight: 2.1-3.2% of dihydric alcohol, 1.9-2.8% of ethanol and the balance of water.

The preparation method of the aluminum crystal label comprises the following steps:

(1) coating 5-9g/m on the front surface of the raw paper layer²Drying the glue to form a glue coating layer, and carrying out dry type composite bidirectional thermal shrinkage PET vacuum aluminizing on the glue coating layer;

(2) preparing an aluminum-plated paper layer: and coating back coating paint on the back surface of the raw paper layer, and drying to form a back coating.

(3) Preparing an aluminum crystal label: and (3) sequentially coating a concave-convex printing layer and a gloss oil layer on the PET layer of the aluminized paper layer, coating a bottom coating on the back coating of the aluminized paper layer, and drying the printing layer, the gloss oil layer and the bottom coating to obtain the aluminum crystal label.

Compared with the prior art, the invention has the following beneficial effects:

the service performance of the product; the advantages of paper product labels and plastic labels are integrated, the function of continuously labeling single paper labels is achieved after the labels are printed, the labeling machine does not need to be replaced, and new and old products can be exchanged on the labeling machine of the production line. Has the advantages of a plastic label in reacting with water, and can not curl when placed in water. After labeling, the label is not influenced by the environmental humidity and the aging, does not bubble, does not wrinkle and does not have label-grasping marks. Is an ideal middle-high label, and is particularly suitable for beer companies in southern wet climates.

Compared with the traditional label, the product has the practicability of a paper label and the appearance effect of a non-setting adhesive plastic label, the cost is lower than that of the non-setting adhesive label, the price of the non-setting adhesive label is slightly higher than that of an ordinary paper label, but the printing effect and the appearance of a sticking bottle are greatly higher than that of the ordinary paper label.

Detailed Description

The following embodiments are further illustrative of the present invention, but the following embodiments are merely illustrative of the present invention and do not represent that the scope of the present invention is limited thereto, and all equivalent substitutions made by the idea of the present invention are within the scope of the present invention.

EXAMPLES 1-4 preparation of aluminized paper layer for aluminum crystal label

The shrinkage rate of the bidirectional heat-shrinkable PET vacuum aluminized film is 50-70 ℃, 30-45% in the longitudinal direction and 55-80% in the transverse direction, and 32 g; the base paper layer material is base paper with medium humidity and strength of 32 g; the wet tensile force of the raw paper layer material is more than or equal to 8 in the longitudinal direction and more than or equal to 4 in the transverse direction; the curing agent is SY-03B.

The back coating comprises the following components in percentage by weight: 1-8% of carboxymethyl cellulose, 8-15% of glycerol, 0.3-0.8% of lubricating humectant (No. 060A01) and 83-90% of water.

The glue layer of the glue layer in example 1 comprises the following components in percentage by weight: 8% of curing agent, 1% of polyacrylic acid sodium salt, 2% of phenolic resin, 40% of ethyl acetate and the balance of water.

The glue layer of the glue layer in example 2 comprises the following components in percentage by weight: 12% of curing agent, 2% of sodium polyacrylate, 4% of phenolic resin, 50% of ethyl acetate and the balance of water.

The glue layer of the glue layer in example 3 comprises the following components in percentage by weight: 10% of curing agent, 1.5% of sodium polyacrylate, 3% of phenolic resin, 45% of ethyl acetate and the balance of water.

The glue layer of the glue layer in example 4 comprises the following components in percentage by weight: 10% of curing agent, 3% of phenolic resin, 45% of ethyl acetate and the balance of water.

Comparative example 1: aluminum-plated film paper layer for preparing aluminum crystal label

The PET vacuum aluminizer used is a unidirectional heat shrinkage PET vacuum aluminizer with the shrinkage rate of 50-70 ℃, 55-80% and 32g in one direction; the base paper layer material is medium wet strength 25-35 g base paper; the wet tensile force of the raw paper layer material is more than or equal to 8 in the longitudinal direction and more than or equal to 4 in the transverse direction; the curing agent is SY-03B.

The glue layer of the glue coating layer comprises the following components in percentage by weight: 10% of curing agent, 1.5% of sodium polyacrylate, 3% of phenolic resin, 45% of ethyl acetate and the balance of water.

The preparation methods of examples 1 to 4 and comparative example 1 were:

(1) coating 5-9g/m on the front surface of the raw paper layer²Drying the glue to form a glue coating layer, and performing dry composite PET vacuum aluminizing on the glue coating layer;

(2) and coating back coating paint on the back surface of the raw paper layer, and drying to form a back coating.

Examples 5-8 and comparative example 1 preparation of aluminum crystal labels

Wherein the coating of the base coat comprises the following components in percentage by weight: 2.1-3.2% of dihydric alcohol, 1.9-2.8% of ethanol and the balance of water.

The aluminized paper layers prepared in examples 1 to 4 and comparative example 1 were prepared into aluminum crystal labels of examples 5 to 8, respectively, by the following methods:

and (3) sequentially coating a concave-convex printing layer and a gloss oil layer on the PET layer of the aluminized paper layer, coating a bottom coating on the back coating of the aluminized paper layer, and drying the printing layer, the gloss oil layer and the bottom coating to obtain the aluminum crystal label.

And (3) testing results:

the off-time test method comprises the following steps: cutting the sample sheets prepared in examples 5-8 and comparative example 2 into sample sheets with the area of 8cm × 8cm, coating 5g of casein glue on the back surfaces of the sample sheets, then pasting the sample sheets on a clean glass bottle, and placing the sample sheets in a laboratory with the temperature of 25 ± 3 ℃ and the relative humidity of 50-60% for 7 days; and then immersing the glass bottle stuck with the specimen into NaOH solution with the mass fraction of 2.5% and the temperature of 85 ℃, starting timing according to a timer, washing the bottle at the stirring speed of 300rpm after 1min, and ending timing when the specimen completely falls off from the glass bottle, thus obtaining the label removing time.

	Off-label speed
		Example 5	187s
Example 6	163s
		Example 7	154s
Example 8	272s
		Comparative example 2	265s

Comparative example 2 when de-branded, 10-15% of the bottles had shrink labels in them.

Claims

1. The aluminum crystal label is characterized by comprising a gloss oil layer, a concave-convex printing layer, an aluminized paper layer and a bottom coating from top to bottom;

the aluminized paper layer comprises an aluminized PET layer, a glue coating layer, a raw paper layer and a back coating from top to bottom; the aluminum-free surface of the aluminum-plated PET layer is bonded with the raw paper layer through the gluing layer; the aluminized PET layer is a bidirectional thermal shrinkage PET vacuum aluminized film; the shrinkage rate of the bidirectional heat-shrinkable PET vacuum aluminized film is 50-70 ℃, the longitudinal shrinkage rate is 30-45%, and the transverse shrinkage rate is 55-80%.

2. The aluminum crystal label according to claim 1, wherein the glue of the glue coating layer of the aluminized paper layer comprises the following components in percentage by weight: 8-12% of curing agent, 1-2% of polyacrylic acid sodium salt, 2-4% of phenolic resin, 40-50% of ethyl acetate and the balance of water.

3. The aluminum crystal label as recited in claim 1, wherein the base paper layer material is medium wet strength 25-35 grams base paper.

4. The aluminum crystal label according to claim 1, wherein the base paper layer material of the aluminized paper layer and the material of the aluminized PET layer are mixed in a weight ratio of 1: 1 compounding.

5. The aluminum crystal label as claimed in claim 1, wherein the coating of the back coating of the aluminized paper layer comprises the following components in percentage by weight: 1-8% of carboxymethyl cellulose, 8-15% of glycerol, 0.3-0.8% of lubricating humectant and 83-90% of water.

6. The aluminum crystal label as recited in claim 1, wherein the coating of the base coat comprises the following components in weight percent: 2.1-3.2% of dihydric alcohol, 1.9-2.8% of ethanol and the balance of water.

7. The method for preparing the aluminum crystal label according to any one of claims 1 to 6, characterized by comprising the following steps:

(1) coating 5-9g/m2 glue on the front surface of the raw paper layer, drying to form a glue coating layer, and performing dry type composite two-way thermal shrinkage PET vacuum aluminizing on the glue coating layer;

(2) preparing an aluminum-plated paper layer: coating a back coating paint on the back surface of the raw paper layer, and drying to form a back coating;