KR19990069716A - Adhesive layer composition and hot stamping foil using same - Google Patents

Abstract

The present invention relates to an adhesive layer composition and a hot stamping foil using the same, comprising: vinyl resin, 60 to 80 parts by weight of acrylic resin, 15 to 35 parts by weight of nitrocellulose, and 180 to ketone resin based on 100 parts by weight of the vinyl resin. The adhesive layer composition of the present invention comprising 230 parts by weight and 30 to 50 parts by weight of the inorganic filler is excellent in aptitude, cutting property and adhesion to the adherend of the rough surface, the adhesive layer composition with an active ingredient of 3.0 to 4.0 g / m ² The hot stamping foils produced using can be widely used in book covers, rough surface paper listed cases, and general paper card stock.

Description

Adhesive layer composition and hot stamping foil using same

The present invention relates to an adhesive layer composition and a hot stamping foil using the same. Specifically, the present invention is suitable for a rough surface adherend including a specific amount of acrylic resin, nitrocellulose, ketone resin, and inorganic filler. The present invention relates to an adhesive layer composition having excellent cutting properties and adhesive strength, and a hot stamping foil using the same.

In general, the stamping foil has a structure in which a film (mainly a heat resistant polyester film) serves as a carrier and a release layer, a coloring layer, a deposition layer, and an adhesive layer are multi-layered coated. It can be transcribed into paper with letters or patterns.

However, the existing adhesive layer lacks the appropriate aptitude and adhesion to the rough surface of the adherend, the need for producing a hot stamping foil suitable for the characteristics of the rough surface of the adherend by changing the composition of the adhesive layer.

Accordingly, the present inventors have continued their research and found that the above problems can be solved by using an adhesive layer composition containing a specific amount of acrylic resin, nitrocellulose, ketone resin, and inorganic filler with respect to the vinyl resin. To complete.

It is an object of the present invention to provide an adhesive layer composition having excellent aptitude, cutability and adhesion to a rough surface adherend and a hot stamping foil using the same.

In order to achieve the above object, in the present invention, a vinyl resin, 60 to 80 parts by weight of acrylic resin, 15 to 35 parts by weight of nitrocellulose, 180 to 230 parts by weight of ketone resin, and inorganic filler 30 based on 100 parts by weight of the vinyl resin Provided is a hot stamping foil having an adhesive layer composition comprising from 50 parts by weight and an adhesive layer comprising 3.0 to 4.0 g / m ² of an active ingredient of the adhesive layer composition.

Hereinafter, the present invention will be described in more detail.

A general stamping foil has a structure in which a release layer, a coloring layer, a deposition layer, and an adhesive layer are multi-layered coated on a polyester film, wherein the release layer includes a wax component, and the colored layer includes a urethane component or a melamine component, Aluminum is vacuum deposited to form a deposition layer. In addition, the adhesive layer includes a vinyl resin, an acrylic resin, nitrocellulose, a ketone resin, and an inorganic filler.

According to the present invention, among the components of the adhesive layer, the vinyl resin, the acrylic resin, and the ketone resin serve to increase the adhesive force. The vinyl resin used in the present invention is a modified vinyl acetate resin called PH-50M (M) (synthetic chemical product) and has a viscosity of 12,000 cps (25 ° C.) and specific gravity of 0.9 to 0.92 (20 ° C.). It has good adhesion to paper, wood, metal, etc., and is used for binders of paints, adhesion and coating of paper, and the like.

In addition, the acrylic resin used in the present invention is a methyl methacrylate-modified acrylic copolymer called VMA (VMA) -45 (Noah Chemicals) and has a viscosity of 30 to 40 seconds (25 ° C., Pod Cup). , Paper coating, plastic bonding and coating, and the like. In the present invention, the acrylic resin is used 60 to 80 parts by weight based on 100 parts by weight of the vinyl resin.

In addition, the ketone resin used in the present invention has a sublimation point of 110 to 120 ° C. as a modified ketone-aldehyde called Resin SK huls, and is used for nitrocellulose lacquer and paper lacquer. In this invention, this ketone resin is used 180-230 weight part with respect to 100 weight part of vinyl resins.

According to the present invention, nitrocellulose among the components of the adhesive layer swells the adhesive surface to the adherend to improve the aptitude for the adherend of the rough surface, and prevents stickiness of the three kinds of resins to prevent the polyester of the substrate of the product It prevents sticking of film and adhesive layer. Nitrocellulose used in the present invention contains 10.7 to 11.5 wt% of nitrogen as NC (NC) 1/8 (unsaturated emulsified product), and is used in an amount of 15 to 35 parts by weight based on 100 parts by weight of the vinyl resin.

According to the present invention, the inorganic filler in the components of the adhesive layer prevents the adhesion between the polyester film and the adhesive layer, which are the substrates of the product, and ensures good cutting according to the shape of the mold during stamping. Inorganic fillers used in the present invention, aerosil # 200 (Aerosil product), silica containing more than 99.8% by weight of silicon dioxide, the average particle is 12㎛, lacquer, paint, printing ink, adhesive, synthetic Used as thickeners, reinforcing agents and antisettling agents such as resins and silicone rubbers. In addition, in the present invention, the inorganic filler is used 30 to 50 parts by weight based on 100 parts by weight of the vinyl resin.

The adhesive layer composition was dissolved in a mixed solvent of methanol: ethyl acetate in a ratio of 6: 4, coated on a polyester film sequentially coated with a release layer, a colored layer, and a deposition layer, and then dried at 100 to 120 ° C. for 10 to 30 seconds. To form an adhesive layer, wherein the active ingredient of the adhesive layer composition is preferably in the range of 3.0 to 4.0 g / m ² .

According to the present invention, a hot stamping foil having an adhesive layer composition having excellent aptitude, cutting property, and adhesion to a rough surface adherend, and an adhesive layer comprising the same, is prepared, such as a book cover, a paper surface case of a rough surface, a general paper card, or the like. It can be widely used.

Hereinafter, the present invention will be described in more detail based on the following examples. However, the following examples are not intended to limit the present invention, but are not limited thereto. Various performance evaluations of the films prepared in Examples and Comparative Examples of the present invention were performed by the following methods.

(1) aptitude

The foil was stamped onto the bookbinding fabric (adhesive) with a metal platen, and then the polyester film was removed and the shape of the metal platen was visually observed.

○: 100% transferred in the form of a platen

△: 90% transferred in the form of a platen

×: 80% transferred in the form of a platen

(2) adhesion

After the foil was stamped on the bookbinding fabric, the degree of peeling was measured when the cellophane tape was pressed on the stamped surface, rubbed, and then peeled off.

○: Good adhesion, not more than 90% of the stamping surface

(Triangle | delta): 50-90% of an adhesive strength and the stamping surface do not fall off

×: Poor adhesion, not more than 50% of the stamped surface does not fall

(3) cutting property

The foil was stamped on the bookbinding fabric, and measured by grading the transcribed letters into 0.4 mm or less, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm and 1 mm or more. Cutability decreases as the grade goes from grade 1 to grade 10, in the case of the present invention, grades 4 to 7, which are medium and large, are suitable.

Letters less than 0.4mm wide Transferable: 1 grade

0.4mm wide Letters: 2-3 grade

0.6mm wide Letter transferable: 4-5 grade

0.8mm wide Letters: 6-7 grades

1mm wide Letters: 8-9 ratings

Letters larger than 1mm can be transferred: 10 ratings

Example 1

500 g of ester wax was dissolved in 200 kg of toluene / methyl ethyl ketone = 2/1 mixed solvent, coated with gravure, dried at 120 ° C. to form a release layer on a polyester film 12μ, and a urethane-based component (15% by weight of isocyanate, nitrocellulose). 6% by weight, 7% by weight of DAP, 52% by weight of methyl ethyl ketone, and 20% by weight of nonone) were coated with gravure and dried at 170 ° C. to form a colored layer, and a deposition layer was formed by aluminum vacuum deposition. Subsequently, vinyl resin, acrylic resin, nitrocellulose, ketone resin, inorganic filler and dye were mixed in the ratios shown in Table 1, and then dissolved in a mixed solvent of methanol: ethyl acetate ≒ 6: 4 to provide the effectiveness of the adhesive layer composition. The polyester film was coated with a gravure roll so that the powder was 3-4 g / m ² . Drying was carried out at 100 to 120 ° C. for 10 to 30 seconds. The results of evaluating the physical properties of the finally prepared foil are shown in Table 1 below.

Examples 2-4 and Comparative Examples 1-3

A polyester film coated with a release layer, a colored layer, a deposition layer, and an adhesive layer was prepared in the same manner as in Example 1 while changing the amount of each component as shown in Table 1 below. The physical property evaluation results of the finally prepared foil are shown in Table 1 below.

division Vinyl resin Acrylic resin Nitrocellulose Ketone resin Inorganic fillers Methanol Ethyl acetate dyes Property evaluation aptitude Adhesion Cutting property weight% weight% weight% weight% weight% weight% weight% weight% - - Rating Example One 5 3 1.6 10 2 46.44 30.96 One ○ ○ 4-5 2 5 3.4 1.6 10 2 46.2 30.8 One ○ ○ 4-5 3 5 4 1.6 10 2 45.84 30.56 One ○ ○ 6-7 4 5 3.4 1.75 10 2 46.11 30.74 One ○ ○ 6-7 Comparative example One 5 2.5 1.6 10 2 46.74 31.16 One △ × 8-9 2 5 4.5 1.6 10 2 45.54 30.36 One △ ○ 10 3 5 3.4 0.75 10 2 46.71 31.14 One △ ○ 8-9

As can be seen from Table 1, the foil according to the embodiment has good aptitude and adhesive strength, but in the case of Comparative Example 1, the amount of acrylic resin is less used to effectively cover the deep concave-convex portion during stamping, the adhesive strength is lowered, Comparative Example 2 and 3, the amount of acrylic resin is used or the amount of nitrocellulose is small, the adhesive strength is good, but the cutability is poor.

The adhesive layer composition according to the present invention has excellent aptitude, cutting property, and adhesion to a rough surface adherend, and thus, a hot stamping foil having an adhesive layer comprising the adhesive layer composition is a book cover, a paper surface case of a rough surface, and a plain paper. It can be widely used for card paper.

Claims (7)

Vinyl resin, 60 to 80 parts by weight of acrylic resin, 15 to 35 parts by weight of nitrocellulose, 180 to 230 parts by weight of ketone resin and 30 to 50 parts by weight of inorganic filler, based on 100 parts by weight of the vinyl resin. Adhesive layer composition. The method of claim 1, An adhesive layer composition, wherein the vinyl resin is a modified vinyl acetate resin having a viscosity of 12,000 cps (25 ° C.) and specific gravity of 0.9 to 0.92 (20 ° C.). The method of claim 1, Adhesive layer composition, characterized in that the acrylic resin has a viscosity of 30 to 40 seconds (25 ° C., pod cup) as a methyl methacrylate modified acrylic copolymer. The method of claim 1, Adhesive layer composition, characterized in that the ketone-based modified ketone-aldehyde having a sublimation point of 110 to 120 ℃. The method of claim 1, Adhesive layer composition, characterized in that the nitrocellulose contains 10.7 to 11.5% by weight of nitrogen. The method of claim 1, Adhesive layer composition characterized in that the inorganic filler is silica containing 99.8% by weight or more of silicon dioxide, the average particle diameter of 12㎛. A hot stamping foil comprising a polyester film, a release layer, a coloring layer, a deposition layer, and an adhesive layer, characterized in that it comprises an adhesive layer containing 3.0 to 4.0 g / m ² of the active ingredient of the adhesive layer composition according to claim 1. Hot stamping foil.