KR101687669B1 - Easycut aluminium tape and producing method thereof - Google Patents

Abstract

The present invention relates to an aluminum tape easy to cut and a method of manufacturing the same. A plastic film formed on the upper surface of the aluminum fabric and having pinholes; And an adhesive layer formed on the lower surface of the aluminum fabric. The aluminum tape of the present invention can be easily and efficiently used in a work because it can easily cut an aluminum tape having a plastic film laminated with a high tensile strength and a plastic film having a pinhole formed on the aluminum fabric.

Description

TECHNICAL FIELD [0001] The present invention relates to an aluminum tape and a method of manufacturing the same,

The present invention relates to an aluminum tape easy to cut and a method of manufacturing the same. More particularly, the present invention relates to an aluminum tape which is made by joining a plastic film having a pinhole on an aluminum fabric to a tape, will be.

Aluminum tape has excellent thermal conductivity, moisture resistance, cold resistance and heat resistance. It is widely used for various industries such as insulation and heating for home, used for heat insulation or duct connection of piping system when new construction or remodeling work of building is done Especially, it is widely used for increasing the cooling efficiency of industrial refrigerator.

In general, the aluminum tape is composed of 30 to 70 탆 of an aluminum fabric, an adhesive, and a silicone-coated release paper. In use, the release paper is peeled off from the adhesive layer of the rolled aluminum tape.

Aluminum is the next most conductive metal after silver and gold and is the most preferred material to increase shielding and cooling efficiency in the industrial field considering cost factors.

However, such an aluminum tape has a weak tensile force, and therefore, there is a problem in a part requiring a process modification or a part requiring a tensile force. In particular, in the case of aluminum tape applied to industrial refrigerators, aluminum tape is attached to a copper wire and the periphery is insulated with an acrylic foam. In this process, aluminum can not withstand and burst, resulting in poor cooling efficiency or corrosion of copper wires .

To solve this problem, Korean Utility Model Laid-Open No. 20-2008-0004219 discloses an aluminum film formed by an aluminum foil, a synthetic resin film adhered to a lower surface of the aluminum layer, and an adhesive layer formed on a lower surface of the synthetic resin film And the like. Such an aluminum tape has an effect of increasing the tensile strength due to the synthetic resin film attached to the lower surface of the aluminum layer, but it is difficult to cut the aluminum tape due to the attached synthetic resin film.

Korean Patent Publication No. 10-2013-0032656 Korean Patent Publication No. 10-2000-073694 Korean Patent Registration No. 10-0795949 Korean Utility Model Publication No. 20-2008-0004219

In order to solve the above-described problems, the present invention provides a method of manufacturing an aluminum foil, which is made of an aluminum foil which is joined to an aluminum fabric to improve the tensile strength of the tape, Tape. ≪ / RTI >

In order to solve the above problems,

An aluminum fabric having a predetermined thickness; A plastic film formed on the upper surface of the aluminum fabric and having pinholes; And an adhesive layer formed on the lower surface of the aluminum fabric.

The aluminum tape of the present invention may further comprise a release paper bonded to the pressure-sensitive adhesive layer.

In the aluminum tape of the present invention, the plastic film may be any one of a stretched polypropylene (OPP) film, a polyethylene terephthalate (PET) film, a polypropylene (PP) film, a polyethylene (PE) film, and a polystyrene desirable.

In the aluminum tape of the present invention, the thickness of the plastic film is preferably 20 to 40 mu m.

In the aluminum tape of the present invention, it is preferable that the pinhole is formed in the form of a perforated line in the width direction of the tape. The width of the perforated line is preferably 3 to 50 mm.

In the aluminum tape of the present invention, the number of the pinholes is preferably about 500 to 20,000 pieces / m 2.

In the aluminum tape of the present invention, the thickness of the aluminum layer is preferably about 6 to 70 mu m.

Further, according to the present invention,

Forming a pinhole in the plastic film; Joining the top surface of the plastic film having the pinhole and the aluminum fabric having a predetermined thickness; And forming a pressure-sensitive adhesive layer on the lower surface of the aluminum fabric.

The method of the present invention may further comprise the step of laminating the release paper to the pressure-sensitive adhesive layer.

In the method of the present invention, the pressure-sensitive adhesive layer is preferably formed by a method comprising the following steps (a) to (e):

(A) a rubber aging step of keeping the raw rubber at room temperature or higher and softening it;

(B) a rubber lowering step of making the aged raw rubber into a sheet having a thickness of about 3 to 4 cm;

(C) dissolving the sheet-form rubber in a solvent together with a resin to prepare a rubber pressure-sensitive adhesive solution;

(D) aging the rubber pressure sensitive adhesive solution to stabilize the physical properties thereof;

(E) coating the aged rubber pressure sensitive adhesive solution on the lower surface of the aluminum fabric.

The aluminum tape of the present invention can be easily cut by hand even when the tensile strength is high, so that it can be efficiently and conveniently used in a work.

1 is a conceptual view of a section of an aluminum tape of the present invention.
2A and 2B show examples of a pattern for forming a pinhole.
Fig. 3 shows an example of a method of forming a pinhole.
4 is a photograph showing the cutting property of the aluminum tape of the present invention.

FIG. 1 conceptually shows a sectional view of an aluminum tape according to the present invention. The aluminum tape of the present invention comprises an aluminum fabric 20 having a predetermined thickness, a plastic film 10 having a pinhole formed on the upper surface of the aluminum fabric, And a pressure-sensitive adhesive layer (30) formed on the lower surface of the aluminum fabric. The pressure-sensitive adhesive layer may further include a release paper (40) on the lower surface of the pressure-sensitive adhesive layer. Hereinafter, each constitution of the aluminum tape of the present invention and a manufacturing method thereof will be described in detail.

1. Preparation of plastic film with pinholes

As a raw material for the plastic film, it is preferable to use a synthetic resin such as stretched polypropylene (OPP), polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE) or polystyrene (PS) . The thickness of the plastic film is preferably 20 to 40 mu m.

A pinhole is formed in the plastic film in order to improve the cutting property. The pinholes can be formed in various ways to improve the tearing property of the finished aluminum tape. Preferably, the number of pin holes is about 500 to 20,000 pieces / m 2. Particularly preferably, it is preferable to form a pinhole of about 10,000 ± 500 per 1 m 2. The more pinholes, the better the tearing property and easier to cut. However, if the pinholes are too much, there may be a problem of blowing when the tension is applied during the drying process.

The pattern in which the holes are formed can also be formed in various patterns such as a shape of a perforated line formed in the width direction of the raw material, an irregular shape, or the like. Examples of patterns for forming pinholes are shown in Figs. 2A and 2B. Preferably, the pinhole is formed in the form of a perforated line in the width direction of the tape. When a pinhole is formed in the form of a perforated line in the width direction of the tape, the cut surface is torn cleanly when torn in the transverse direction, whereas the cut surface is not constant when torn when the pinhole is formed irregularly. When the pinhole pattern is formed in the form of a perforated line, the width is preferably about 3 to 50 mm. A preferred example of forming a pinhole is to form a pinhole in the tape advancing direction in a size of about 1 mm, a gap of about 0.5 mm, and a width of about 5 mm.

The formation of such pinholes can be carried out using methods known in the art. For example, a method of forming a pinhole by applying a predetermined pressure to a copper plate having pins of a predetermined size formed in a predetermined pattern can be used. In an embodiment of the present invention shown in FIG. 3, a pinhole is formed by using a plate having predetermined pins.

2. Aluminum Fabric

An aluminum fabric of a certain thickness usually used for aluminum tape is prepared. Preferably, the thickness of the aluminum fabric is 6 to 70 占 퐉. The thus prepared aluminum fabric and the plastic film having the pinholes prepared above are joined together. As the laminating method, it is possible to use a dry laminating method in which an adhesive is applied to a plastic film and the aluminum fabric is lapped and cured for a predetermined time.

The pressure-sensitive adhesive can be used without limitation as long as it can bond plastic film and aluminum fabric. In the present invention, "pressure-sensitive adhesive" is meant to include both a pressure-sensitive adhesive and an adhesive. In particular, the same pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer in the aluminum tape of the present invention may be used, or a publicly known polymer pressure-sensitive adhesive may be used. Examples of known polymeric pressure sensitive adhesives include adhesives including UV curable adhesives, hot melt adhesives, water-soluble adhesives, urea resins, urethane resins, polyvinyl alcohol resins or polyvinyl acetate resins, styrene thermoplastic elastomers, A vinyl adhesive, an ethylene acrylic copolymer, an olefin adhesive, a polyester adhesive, a polyamide adhesive, a polyurethane adhesive, or a natural polymer adhesive. As the method for coating the pressure sensitive adhesive, conventional pressure sensitive adhesive coating methods such as a comma coating, a spray coating, a roll coating, and a printing can be used.

3. The pressure-  formation

The pressure-sensitive adhesive can be prepared and coated on an aluminum fabric in the same manner as in a conventional aluminum tape manufacturing method. In a preferred embodiment, it is prepared by the following steps (a) through (f) and coated on an aluminum fabric.

(A) Rubber Ripening Step

The rubber in the form of bale is kept in a warehouse at room temperature or higher, preferably about 30 to 40 DEG C, to soften the rubber.

The raw rubber is not particularly limited as long as it can exhibit transparency and tackiness after coating after dissolution, and may be a natural rubber, polyisoprene, polyisobutylene, butyl rubber, butadiene rubber, isoprene rubber, acrylonitrile butadiene rubber (NBR) , Urethane rubber, styrene / butadiene rubber (SBR), acrylic rubber, and silicone rubber. The kind of such rubber can be appropriately selected according to the desired physical properties of the tape to be finally produced.

(B) Rubber descent phase

The ductile rubber is formed into a sheet of about 3 to 4 cm thick using a device such as a roll mill, a Banbury mixer or a Kneader mixer. At this stage, the cohesive network of rubber is decomposed and becomes softened.

When performing the rubber lowering using 2-roll mill, various additives such as coloring agent, filler, reinforcing agent, carbon, compound oil, wax, stearic acid, sulfur, accelerator and the like are added and kneaded for 2 to 3 minutes . At this time, the temperature of the roll is set differently depending on the type of rubber used.

(C) Pressure-sensitive adhesive solution preparation step

The resulting rubber adhesive solution is prepared by dissolving the obtained soft rubber in a solvent together with the resin to a solids content of about 15 to 25% by weight, particularly preferably 20% by weight.

The solvent is not particularly limited as long as it is a kind capable of dissolving the rubber, and it is preferable to use a petroleum solvent, a volatile solvent or a mixed solvent thereof having a very high solubility in rubber. As the resin, it is preferable to use at least one petroleum-based aliphatic hydrocarbon resin obtained by polymerizing an unsaturated aliphatic olefin and a diolefin derived by a thermal cracking process, which is used in a conventional adhesive, The resin is added in order to give an insufficient initial adhesion when the rubber is used alone.

(D) Ripening stage

The pressure-sensitive adhesive solution is stored in a tank for about 18 to 30 hours, particularly preferably for about 24 hours, so that the properties can be sufficiently stabilized. Through such aging, the physical properties of the rubber pressure-sensitive adhesive solution are sufficiently stabilized, and in particular, the bubbles in the rubber pressure-sensitive adhesive solution are separated and removed by stirring, some of the solvent is volatilized and the viscosity is maintained uniformly. During the aging process, a change in the rubber pressure sensitive adhesive solution over time occurs and adhesive force is developed.

(E) Coating step

The aged rubber adhesive solution is coated on the lower surface of the aluminum fabric. Conventional methods such as comma coating, spray coating, roll coating, and printing can be used for the coating. The coating thickness is determined appropriately according to the purpose of use. When the coating is completed, the coated rubber adhesive solution is dried to make the surface sticky. The drying may be carried out by various methods such as natural drying in air at room temperature, drying using hot air at 100 to 130 ° C, and drying in an oven controlled in temperature. In the case of drying by heating, if the temperature is less than 100 ° C, the drying speed is low and productivity is low, and if it exceeds 130 ° C, the rubber pressure-sensitive adhesive or the base film may be deformed.

4. Aluminum tape Coiling ( winding ) And cutting

Aluminum tapes can be produced with a release-type and a release-free type, depending on the efficiency and efficiency of the shop floor. The releasing paper is lined with a release paper conventionally used for aluminum tape according to a conventional method. As releasing paper, silicone-coated release or release films commonly used can be used. In the present invention, "releasing paper" is meant to include both release paper and release film. The finished aluminum tape is wrapped under compression and then cut and packed according to the standard.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. The following examples and experimental examples illustrate the invention and are not to be construed as limiting the scope of the invention.

< Example  1>

A pinhole was formed in an oriented OPP film having a thickness of 40 占 퐉 in units of a size of 1 mm, a gap of 0.5 mm, and a width of 5 mm in the tape advancing direction. A 30 μm-thick aluminum fabric was laminated on one side of the plastic film having the pinhole formed thereon, followed by comma coating on the other side of the aluminum fabric and drying with hot air at 100-130 ° C. to form a pressure-sensitive adhesive layer. A silicone release coated paper was laminated on the pressure sensitive adhesive layer to complete an aluminum tape.

< Experimental Example  1>

The physical properties of the aluminum tape produced in Example 1 were tested as follows.

Item unit value Test Methods Product thickness aluminum ㎛   30  ASTM D 3652 film ㎛   40 Release paper g / sq   80  ASTM D 3652 adhesiveness N / mm    3.68  JIS Z 0237: 2009 Initial Tack (Ball TACK) No 5    9  KS T 1028 Holding power mm    0.1  100 ° C / 1 kg / 1 hr

< Experimental Example  2>

The tensile strength of a conventional aluminum tape (comparative example) manufactured by the same method except that the aluminum tape of the present invention manufactured in Example 1 and the pinhole formed plastic film were not joined was checked by the FITI test institute The results are shown in Table 2 below.

Test Items Test result Tensile strength (KS T 1028: 2009)
(Unit: N / 10mm) Invention Comparative Example 25.6 18.3

Tested after removal of Lipo paper (Note)

From the results shown in Table 2, it can be seen that the aluminum tape of the present invention having the plastic film laminated thereon has excellent tensile strength as compared with the aluminum tape without plastic film.

< Experimental Example  3>

Fig. 4 is a photograph showing a test for cutting performance when the aluminum tape produced in Example 1 is torn by hand. Fig. As shown in the photograph of FIG. 4, the aluminum tape of the present invention is easily cut by hand.

10: plastic film 20: aluminum fabric
30: pressure-sensitive adhesive layer 40:
a: Pinhole

Claims (15)

An aluminum fabric having a thickness of 6 to 70 탆;
A plastic film laminated on the upper surface of the aluminum fabric and having a pinhole of 500 to 20,000 pcs / m &lt; 2 &gt;
And an adhesive layer formed on the lower surface of the aluminum fabric,
The plastic film may be a stretched polypropylene (OPP) film; Polyethylene terephthalate (PET) film; Polypropylene (PP) film; Polyethylene (PE) film; And a polystyrene (PS) film. The method according to claim 1,
Further comprising a release paper bonded to the pressure-sensitive adhesive layer. The method according to claim 1,
Wherein the plastic film is a stretched polypropylene (OPP) film. delete The method according to claim 1,
Wherein the pinhole is formed at a density of 10,000 +/- 500 pieces / m &lt; 2 &gt;. 6. The method of claim 5,
Wherein the pinhole is formed in the form of a perforated line in the width direction of the tape. The method according to claim 6,
And the width of the perforated line is 3 to 50 mm. delete Forming a pinhole of 500 to 20,000 pieces / m 2 on a plastic film having a thickness of 20 to 40 탆;
Joining the top surface of the plastic film on which the pinhole is formed and the aluminum cloth having a thickness of 6 to 70 mu m;
And forming a pressure-sensitive adhesive layer on the lower surface of the aluminum fabric,
The plastic film may be a stretched polypropylene (OPP) film; Polyethylene terephthalate (PET) film; Polypropylene (PP) film; Polyethylene (PE) film; Polystyrene (PS) film, which is easy to cut. 10. The method of claim 9,
And bonding the release paper to the pressure-sensitive adhesive layer. delete 10. The method of claim 9,
Wherein the pinhole is formed at a density of 10,000 +/- 500 pieces / m &lt; 2 &gt;. 13. The method of claim 12,
Wherein the pinhole is formed in the form of a perforated line in the width direction of the tape. 14. The method of claim 13,
Wherein the perforated line has a width of 3 to 50 mm. 10. The method of claim 9,
The pressure-
(A) a rubber aging step of keeping the raw rubber at room temperature or higher and softening it;
(B) a rubber lowering step of making the aged raw rubber into a sheet having a thickness of 3 to 4 cm;
(C) dissolving the sheet-form rubber in a solvent together with a resin to prepare a rubber pressure-sensitive adhesive solution;
(D) aging the rubber pressure sensitive adhesive solution to stabilize the physical properties thereof;
(E) coating the aged rubber pressure sensitive adhesive solution on the lower surface of the aluminum fabric.

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