KR101178480B1 - Transfer Foil - Google Patents

Abstract

The present invention relates to a transfer foil, and relates to an offset printing ink and a transfer foil having excellent adhesion, cutting property and transferability when applied to an offset printing method.

Transfer foil, offset printing

Description

Transfer Foil {Transfer Foil}

The present invention relates to a transfer foil, and more particularly to a transfer foil applied to the offset printing method.

Stamping foil is mainly used as a method of transferring a graphic pattern, a character, etc. of a metal component to the to-be-adhered material of various materials, such as a plastic molded article, a leather article, a wooden article, and a paper article.

Stamping foils are also called hot stamp tapes or thermal transfer tapes. The stamping foil has a structure in which a release layer, a coloring layer, a metal deposition layer, and an adhesive layer are sequentially laminated on a base film usually made of a polyester resin.

This stamping foil is used in a hot stamping process in which heat and pressure are transferred using a die of a type to be transferred.

However, in order to use the hot stamping process, it is necessary to have a die of a certain shape, and another type of die is required to change the shape, so it is not economical, and it is not easy to be transformed into various forms. And, there was a problem that is not suitable for the high-speed transfer method.

Therefore, it is possible to reduce the cost because it is not necessary to produce a die, to secure the beauty of the design, etc., and attention is focused on a dieless transfer method capable of high-speed transfer. These patents are disclosed in US Pat. 5603259, etc .;

That is, there is a demand for the development of a transfer paper capable of forming a pattern with ink through high-speed printing such as offset printing and flexographic printing without a die, and having excellent adhesiveness with the ink.

An object of the present invention is to provide a transfer foil having an adhesive layer having excellent adhesion with offset inks and excellent cutting property and transferability.

The present invention is a transfer foil used in the offset printing method, a release layer, a coloring layer, an aluminum deposition layer, an adhesive layer are formed in this order on the base film layer, and among the layers constituting the transfer foil, especially for offset printing by improving the physical properties of the adhesive layer It is to make it excellent in adhesiveness, cutting property, and transfer property with ink.

That is, the transfer foil of the present invention is made of a resin composition excellent in adhesion with the offset printing ink, and unlike the hot stamping method of transferring using a conventional heat, the offset printing is a transfer by printing in the state without applying heat In order to enable high-speed printing, an adhesive layer having excellent adhesiveness, cutting property, and transferability with an offset printing ink is required.

The adhesive layer of the present invention is the sum of the content of the resin component is 60 to 90% by weight of the total solid content of the adhesive layer, more specifically the adhesive layer is a solid content of acrylic resin 50 to 70% by weight, vinyl resin 10 to 30% by weight, It contains 5 to 20% by weight of silica particles. In addition, 1 to 30% by weight of any one or more additives selected from rosin paper, hydrocarbon resin, and epoxy resin are further included as necessary.

Hereinafter, the above components will be described in more detail.

The resin component of the adhesive layer of the transfer foil is preferably used by mixing an acrylic resin and a vinyl resin, wherein the content of the resin component is used as 60 to 90% by weight of the total solid content of the adhesive layer. If it is less than 60% by weight, the adhesive force with the offset ink is poor, and if it is more than 90% by weight, the cutting property which should be basically obtained as a foil becomes poor.

In addition, the glass transition temperature of the acrylic resin and the vinyl resin is preferably 50 ~ 80 ℃. If the glass transition temperature is less than 50 ℃, the cutability is poor, if the glass transition temperature exceeds 80 ℃ poor adhesion.

The acrylic resin serves to secure the adhesive force and the cutting property with the offset ink, for example, a polymethyl (meth) acrylate resin, a copolymer of methyl (meth) acrylate and butyl (meth) acrylate, Any one or a mixture of two or more selected from ethyl (meth) acrylate, isobutyl (meth) acrylate, methyl acrylate and butyl (meth) acrylate is used. The solids content of the acrylic resin is 50 to 70% by weight of the total solids content of the adhesive layer, when used less than 50% by weight, the adhesion is poor, and when more than 70% by weight is poor cutting.

The vinyl-based resin serves to prevent the problem of blowing the powder during the process by increasing the cohesive force of the adhesive resin, for example, polyvinyl acetate, polyvinyl chloride, copolymer of polyvinyl acetate and polyvinyl chloride, ethylene vinyl One or a mixture of two or more selected from acetate, chlorinated ethylene vinyl acetate is used. Solid content of the vinyl resin is 30% by weight or less, specifically 10 to 30% by weight of the total solid content of the adhesive layer. When the amount is less than 10% by weight, the cohesive force is insufficient, causing a problem of blowing the powder in a subsequent process, and when it exceeds 30% by weight, the cutting property is poor.

The silica particles are used to ensure the cutting property, it is used in 5 to 20% by weight of the total solid content of the adhesive layer. When used in the above range, the cutting property and the transferability with the offset ink is good.

In addition to the acrylic resin and the vinyl resin, the adhesive layer of the present invention may be formed by further adding one or more mixtures selected from rosin resin, hydrocarbon resin, and epoxy resin that contribute to cutting properties and transferability. At this time, the addition amount is preferably added within the range of 1 to 30% by weight of the total solid content of the adhesive layer. When the content of the additive is used in less than this range it is difficult to secure the cutting properties and transferability, if exceeded may cause a problem that the powder is blown in the post-process due to the lack of cohesive force of the adhesive layer.

The adhesive layer is preferably a dry coating amount of 0.5 ~ 0.7g / ㎡. If it is less than 0.5g / ㎡ there is a problem of generating a scratch on the aluminum deposition layer in the adhesive coating process, when the exceeding 0.7g / ㎡ may cause a problem that the cutability is poor.

In the present invention, components other than the adhesive layer may be used without limitation as long as they are components used in the art.

The transfer foil according to the present invention has excellent offset ink and adhesive force when applied to the offset printing method, and is capable of high speed transfer because of good transferability and cutting property.

The present invention will be described in detail with reference to the following examples. However, the present invention is not limited to the following examples.

The offset ink used in the examples below used EURALOX Glue from Zeller and Gmelin.

The method of measuring the physical properties is as follows.

(1) cutting

After printing 5mm high and 1mm thick letters through the offset printing on the art paper, laminating the printing surface and the adhesive layer of the foil prepared in Example using a 2kg weight roller at room temperature, and then immediately separating and printing the transferred shape The degree of cutting was evaluated by looking at the degree similar to the shape of the offset ink.

Offset Ink Passes when the periphery of printed text is cut cleanly

Offset Ink Poor if flakes or tears occur in the periphery of printed text

(2) Transcription

After printing 5mm high and 1mm thick letters through the offset printing on the art paper, laminating the printing surface and the adhesive layer of the foil prepared in Example using a 2kg weight roller at room temperature, and then immediately separating and printing the transferred shape The transferability was evaluated by looking at the degree similar to the shape of the offset ink.

Same as offset ink printing appearance: Pass

Excessive flakes in the appearance of offset ink prints: Poor

(3) adhesion

5 seconds after attaching the scotch tape (3M) to the final transferred foil when removing the tape. If the transferred foil is peeled off, it is good if it is not peeled off.

(4) Surface resistance (Ω / sq)

Using the AIT CMT SR1000N apparatus, a 4-point probe was placed on the deposition surface at 25 ° C. and 50% relative humidity, and then stable data was measured after 30 seconds.

Example 1

As a base film, a 12-micrometer-thick polyethylene terephthalate film (KOLON, FQ00) was used.

70% by weight of acrylic resin (Degussa, Acryloid B66), 20% by weight of cellulose derivatives (Eastman, CAB381-0.1) and 10% by weight of polyethylene wax (Hoechst, Montan OP wax) as a release layer on the base film The mixture was mixed in solid content, and the coating was performed such that the dry coating amount was 0.3 g / m 2.

30 g by weight of acrylic resin (Aekyung Chemical, A-111-50) and 70% by weight of cellulose derivative (Eastman, CAB381-0.1) as a colored layer on top of the release layer, the dry coating amount 1.0g / ㎡ The coating was carried out so as to.

An aluminum deposition layer having a surface resistance of 3.0 mA / sq after deposition was formed on the colored layer by using a resistance heating method.

15% by weight of polyvinyl acetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and 70% by weight of acrylic resin (Degussa, Acryloid B66) as an adhesive layer on the aluminum deposition layer, silica particles (Degussa, Aerosin R200) A solid content of 10% by weight and rosin paper (Arakawa, Superester A100) 5% by weight was mixed to prepare a coating so that the dry coating amount was 0.6g / m 2.

The composition of the prepared transfer foil is summarized in Table 1, and the physical properties thereof are shown in Table 2 below.

[Example 2]

The base film, the release layer, the coloring layer, and the aluminum deposition layer were prepared in the same manner as in Example 1, and 25 wt% of polyvinyl acetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and acrylic resin (Degussa, B66) 60% by weight of silica particles (Degussa, Aerosin R200) 15% by weight of the solid content of the coating so that the dry coating amount is 0.6g / ㎡ to prepare a transfer foil.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

[Example 3]

The base film, the release layer, the coloring layer, and the aluminum deposition layer were prepared in the same manner as in Example 1, and 10 wt% of a polyvinyl acetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and an acrylic resin (Degussa, B66) 50% by weight, silica particles (Degussa, Aerosin R200) 15% by weight and rosin paper (Arakawa, Superester A100) with a solid content of 25% by weight of the coating to dry coating amount 0.6g / ㎡ to prepare a transfer foil It was.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

Comparative Example 1

The base film, the release layer, the coloring layer, and the aluminum deposition layer were prepared in the same manner as in Example 1, and 10 wt% of a polyvinyl acetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and an acrylic resin (Degussa, B66) 30% by weight, silica particles (Degussa, Aerosin R200) 25% by weight and rosin paper (Arakawa, Superester A100) solid content of 35% by weight of the coating to dry coating amount to 0.6g / ㎡ to prepare a transfer foil It was.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

Comparative Example 2

The base film, the release layer, the coloring layer, and the aluminum deposition layer were prepared in the same manner as in Example 1, and 20 wt% of polyvinyl acetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and acrylic resin (Degussa, B66) 50% by weight, silica particles (Degussa, Aerosin R200) 3% by weight and rosin paper (Arakawa, Superester A100) solid content of 27% by weight of the coating to dry coating amount to 0.6g / ㎡ to prepare a transfer foil It was.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

[Comparative Example 3]

The base film, the release layer, the coloring layer, and the aluminum deposition layer were prepared in the same manner as in Example 1, and 20 wt% of polyvinyl acetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and acrylic resin (Degussa, B66) 75% by weight of silica particles (Degussa, Aerosin R200) of 5% by weight of the solid content of the coating was coated so that the dry coating amount is 0.6g / ㎡ to prepare a transfer foil.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

[Comparative Example 4]

The base film, the release layer, the coloring layer, and the aluminum deposition layer were prepared in the same manner as in Example 1, and 30% by weight of polyvinyl acetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and acrylic resin (Degussa, B66) 25% by weight of silica particles (Degussa, Aerosin R200) and 20% by weight of rosin paper (Arakawa, Superester A100) with a solid content of the coating so that the dry coating amount is 0.6g / ㎡ to prepare a transfer foil It was.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

[Comparative Example 5]

Base film, release layer, colored layer and aluminum deposition layer were prepared in the same manner as in Example 1, 35% by weight of polyvinyl acetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and acrylic resin (Degussa, B66) 30% by weight, silica particles (Degussa, Aerosin R200) 20% by weight and rosin paper (Arakawa, Superester A100) solid content of 5% by weight of the coating so that the dry coating amount is 0.6g / ㎡ to prepare a transfer foil It was.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

[Comparative Example 6]

The base film, the release layer, the coloring layer, and the aluminum deposition layer were prepared in the same manner as in Example 1, and 5% by weight of polyvinylacetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and acrylic resin (Degussa, B66) A transfer foil was prepared by coating a dry coating amount of 0.6 g / m 2 with a solid content of 70 wt%, silica particles (Degussa, Aerosin R200) 15 wt% and rosin paper (Arakawa, Superester A100) 10 wt%. It was.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

[Comparative Example 7]

The base film, the release layer, the coloring layer, and the aluminum deposition layer were prepared in the same manner as in Example 1, and 5% by weight of polyvinylacetate and polyvinyl chloride copolymer (Dow Chemical, VMCH) and acrylic resin (Degussa, B66) A transfer foil was prepared by coating a dry coating amount of 0.8 g / m 2 with a solid content of 70 wt%, silica particles (Degussa, Aerosin R200) 15 wt% and rosin paper (Arakawa, Superester A100) 10 wt%. It was.

The composition of the prepared transfer foil is summarized in Table 1, and measured and shown in Table 2.

[Table 1]

[Table 2]

As shown in Table 2, in the case of the embodiment according to the present invention, it was found that the transferability with the offset ink, cutting property and adhesive force were all good. Therefore, it can be seen that it can be easily transferred even in the high speed printing method by the printing method, not the method of thermal compression by the die during printing.

However, in Comparative Example 1 in which the silica particle content was higher than the claims, the transferability was poor, and in Comparative Example 2 in which the silica particle content was less than the claims, the cutability was poor.

When the content of the acrylic resin exceeds the claims as in Comparative Example 3, the cutability was poor, and when the content of the acrylic resin was used below the claims as in Comparative Example 4, it was found that the transferability was poor.

When the content of the vinyl resin exceeds the claims as in Comparative Example 5, the cutability was poor, and when the content of the vinyl resin is used below the claims as in Comparative Example 6, the transferability was poor.

In addition, as in Comparative Example 7, the content of the vinyl-based resin is used below the claims, it was found that the transferability is poor when the dry coating amount exceeds the claims.

Claims (7)

As a transfer foil used in the offset printing method, a release layer, a coloring layer, an aluminum deposition layer, and an adhesive layer are sequentially formed on the base film layer, and the adhesive layer has a solid content of 50 to 70 wt% of an acrylic resin, polyvinyl acetate, and polyvinyl. A transfer foil comprising 10 to 30% by weight of a copolymer of chloride, 5 to 20% by weight of silica particles and 1 to 30% by weight of any one or more additives selected from rosin, hydrocarbon and epoxy resins. delete delete The method of claim 1, The acrylic resin is a polymethyl (meth) acrylate resin, a copolymer of methyl (meth) acrylate and butyl (meth) acrylate, ethyl (meth) acrylate, isobutyl (meth) acrylate, methyl acrylate, butyl A transfer foil which is any one or a mixture of two or more selected from (meth) acrylates. delete The method of claim 1, The transfer foil of the glass transition temperature of the copolymer of the acrylic resin, polyvinyl acetate and polyvinyl chloride is 50 ~ 80 ℃. The method of claim 1, The adhesive layer is a transfer foil having a dry coating amount of 0.5 ~ 0.7g / ㎡.