KR101833861B1 - A masking tape for blasting and painting for building of ships and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a blast for shipbuilding and a paint masking tape, which comprises a film substrate, a short fiber nonwoven fabric layer adhered to the upper surface thereof, and an adhesive layer applied to the bottom surface of the film substrate, And a paint masking tape, wherein the film substrate has a surface layer and a support layer having durability in a blasting operation, and intermediate layers having flexibility and impact absorbing property between the surface layer and the support layer are integrally fused and integrally molded in a melt state, A specific property is given to each layer to realize desired physical properties and at the same time the thickness is minimized to facilitate workability and the pressure sensitive adhesive can be applied to rolls (Selfwinding), the upper nonwoven fabric and the pressure-sensitive adhesive It has the advantage that ambient contamination is prevented in accordance with the dropping paint residues by curing the paint does stick than is necessary that, even though coating work during unwinding property is ease adsorbed on the nonwoven fabric are integrated.

Description

TECHNICAL FIELD [0001] The present invention relates to a blasting and paint masking tape for shipbuilding, and a method for manufacturing the blasting and paint masking tape.

The present invention relates to a process for preparing a paint for a coating operation in a painting process, in which, in addition to an improved durability against a blast process applied for paving, The present invention relates to a masking tape improved to adsorb a paint applied to a masking area so as to prevent scattering, and a manufacturing method thereof.

In general, in coating work during ship building, automobile construction, and interior construction work, the surface of metal to be painted is first cleaned, and then masking tape is usually applied to portions where paint should not be applied, And the masking tape remains attached until a subsequent operation is performed.

However, unlike a vehicle, zinc rich primer is applied as a temporary rust preventive agent in the production of iron plate to overcome the high humidity condition containing a large amount of salt in the marine environment when the ship is dried. Therefore, For coating, the zinc rich primer is completely removed by blasting and this coating is carried out.

By attaching a masking tape excellent in impact resistance and heat resistance in advance to a portion not to be coated at the time of such blasting, removal of the zinc rich primer can be prevented.

Since the portion to which the masking tape is adhered should be welded to the other block in the subsequent process, the heavy coating agent should not be applied to the portion.

Therefore, in order to improve the work efficiency, masking tape must be applied to blast masking through impact resistance and heat resistance as well as paint masking effect.

Thus, the masking tape used in the coating operation must basically remain attached to the substrate for a period of time, and then the adhesive should not remain on the substrate when the masking tape is removed for subsequent processing.

Conventionally, a so-called "blue tape" has been generally used as such a masking tape. However, since the paint applied on the surface of the blue tape is detached from the surface of the blue tape with time, There has been a problem in that it is necessary to carry out the work of removing the residual adhesive since the adhesive remains in the removal of the clean tape.

The reason why the cured paint is dropped off from the surface of the blue tape is that the nonwoven fabric and the pressure-sensitive adhesive on the upper surface are unnecessary even if a separate protective paper is not used for easy workability at the time of tape production, Because it does not adhere to the surface of the substrate.

In general, the backing agent uses a material such as silicone or wax because it has the ability to prevent adhesion of other materials by lowering the surface energy of the film.

Therefore, there has been a problem in that the release tape must be used like a sticker without winding up in a roll state in order for the masking tape to adsorb the paint.

As a remedy for this, the present applicant has proposed a masking tape in Korean Patent Laid-Open No. 10-2008-0069843 (published on July 29, 2008). 1, a masking tape having at least one reinforcing layer on a base film coated with a pressure-sensitive adhesive layer on the bottom surface, wherein the masking tape is provided on the base film 1 The releasing agent 3 is attached to the upper surface of the nonwoven fabric so as to prevent the adhesive agent 4 on the bottom surface of the base film and the upper surface of the nonwoven fabric 2 from sticking to each other when the masking tape is wound in a rolled state, The release agent is applied only to the fine fingernails.

However, since the masking tape can not withstand the impact and heat resistance sufficiently in the blasting process performed in the pretreatment process of the painting operation, the damaged portion must be repaired in order to perform the painting operation.

When the thickness of the substrate film is increased to improve the durability, there is a problem that the bendability is decreased and the adhesion to the bent portion is lowered. Therefore, the film has sufficient durability against the blast process without increasing the thickness of the masking tape, Improved blast and paint masking tape is required for use.

Published Japanese Patent Application No. 10-2008-0069843 (published on July 29, 2008)

It is an object of the present invention to provide a masking tape which is used to remove squeegee and remove zinc rich primer in a part to be coated at the time of shipbuilding and to protect the zinc rich primer at a necessary site, To provide an improved marine blast and paint masking tape that prevents paint from sticking to the surface of the masking tape during paint application to prevent ambient contamination due to hardened paint fragments and which does not leave the adhesive on the surface of the vessel upon removal of the masking tape will be.

Another object of the present invention is to provide a method for manufacturing the improved marine blast and paint masking tape as described above.

In order to achieve the above object, the present invention provides a blast and paint masking tape for shipbuilding, comprising: a film substrate; a short fiber nonwoven fabric layer adhered to the upper surface thereof; and an adhesive layer applied to the bottom surface of the film substrate, A blast and paint masking tape for shipbuilding comprising:

The film substrate is characterized in that the intermediate layer having flexibility and shock absorbing property between the surface layer and the support layer having durability in the blasting operation and the intermediate layer having flexibility and impact absorption property are integrally fused and formed in the state of being melted integrally and the backing agent is coated on the upper surface of the non- .

The surface layer and the support layer are made of one material selected from PP, MPE and PVC, which are rigid materials. The surface layer and the support layer are formed of a material selected from the group consisting of PP, MPE and PVC. The intermediate layer is preferably made of a polyethylene resin having good flexibility and a chain-like organic resin containing EVA so as to be easily attached to a bent portion.

The monofilament nonwoven fabric has a thickness of 30 to 100 micrometers at ¹⁰ to 50 g / m ² and is made of any one selected from PET, PP, nylon, pulp and viscose rayon, and is adhered to the upper surface of the substrate with a thermoplastic adhesive resin, do.

The pressure-sensitive adhesive is selected from rubber-based and acrylic-based pressure-sensitive adhesives except for a silicone-based pressure-sensitive adhesive. The pressure-sensitive adhesive layer is applied to the release paper and transferred to the bottom of the film-base paper and then protected at 50 to 60 ° C for 24 to 48 hours It is preferable that the curing agent contained in the pressure-sensitive adhesive is partially cured after the aging process.

It is preferable that the bottom surface of the film substrate is subjected to a corona discharge treatment so as to give a roughness of a predetermined depth to the surface so that the adhesive applied to the bottom surface of the film substrate can be firmly adhered.

The backing agent is preferably applied at a depth corresponding to 20 to 30% of the total nonwoven fabric thickness from the top surface of the nonwoven fabric.

In addition, the release agent may contain 60 to 95% by weight of a long chain-alkyl pendant polymer and 5 to 40% by weight of dimethyl sulfoxide.

The backing agent may include a curing-type silicone resin, and the curing-type silicone resin may include silicone diacrylate, silicone hexaacrylate, silicone polyester acrylate, silicone urethane acrylate, And at least one selected from the group consisting of silicate Urethane acrylate and silicone Urethane methacrylate, and includes any one of a curing catalyst selected from the group consisting of melamine and platinum.

The backing agent is preferably applied by diluting 1 part by weight to 10 parts by weight with respect to 100 parts by weight of the organic solvent and is dried by being conveyed at a rate of 50 to 100 m per minute in a drying chamber at 70 to 100 ° C.

The blasting and paint masking tape for shipbuilding according to the present invention is characterized in that it comprises a short fiber nonwoven fabric layer adhered on the upper surface of the film substrate, a backing agent applied on the upper surface of the nonwoven fabric, a blast for shipbuilding comprising a pressure- In the method,

A film substrate is formed in the form of a film in which a surface layer, an intermediate layer and a support layer are integrated as a melt state,

The thermoplastic adhesive resin is melted and flowed between the single-fiber nonwoven fabric and the film substrate, which is made of any one selected from PET, PP, nylon, pulp and viscose rayon and has a thickness of 30 to 100 micrometers at ¹⁰ to 50 g / And pressed by a cooling roller to integrate the film base material and the short-fiber nonwoven fabric,

A backing agent is applied from the top surface of the nonwoven fabric to a depth corresponding to 20 to 30% of the total nonwoven fabric thickness,

The pressure-sensitive adhesive of the pressure-sensitive adhesive layer formed on the bottom surface of the film substrate is applied to the release paper in a thickness of 20 to 70 탆 and transferred to the bottom surface of the film, and then, at 50 to 60 캜 for 24 to 48 hours And partially curing the mixture through an aging process.

The pressure-sensitive adhesive of the pressure-sensitive adhesive layer formed on the bottom surface of the film substrate is applied to the release paper in a thickness of 20 to 70 탆 and transferred to the bottom surface of the film, and then, at 50 to 60 캜 for 24 to 48 hours And partially curing the mixture through an aging process.

The masking tape according to the present invention is a thin film substrate in which layers having high impact resistance and heat resistance are integrated with a layer having good flexibility, and durability and flexibility are improved, so that heat-resistant staple fibers are evenly dispersed in the film substrate, It is possible to integrate the nonwoven fabric having a uniform thickness and to use a backing agent having an optimized thickness and to apply a pressure sensitive adhesive layer to prevent the adhesive residue from remaining on the upper surface of the nonwoven fabric, , The painted paint penetrates into the nonwoven fabric and is integrated, thereby preventing the pollution of the surroundings due to detachment of the hardened paint and assuring the safety of the workers.

1 is a schematic cross-sectional view of a conventional masking tape.
2 is a schematic cross-sectional view of a blast and paint masking tape according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.

2, the blast and paint masking tape according to the present invention is made of synthetic resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), ethylene vinyl acetate A nonwoven fabric layer 11 adhered to the upper surface of the film base 10, and an adhesive layer 12 applied to the bottom surface of the film substrate.

The film substrate is a plurality of layers having different physical properties so as to have durability in the blast operation. In the illustrated embodiment, the three layers are 35 to 40% of the total surface film thickness of the film substrate 15, 23 to 28% ), And 30 to 37% is composed of the support layer 17 so as to have the necessary physical properties for durability against blast, and at the same time, the thickness is minimized, thereby facilitating workability even in a curved working area.

At this time, if the thicknesses of the surface layer and the support layer, which are required to have rigidity and heat resistance, are relatively thin, the blast masking performance can not be exhibited due to the durability against impact and heat generated during the blasting operation. If the necessary interlayer is made relatively thin, there is a problem of workability and adhesion to the bent portion.

The surface layer and the support layer are made of rigid PP, MPE, and PVC. The intermediate layer is made of a chain type organic resin such as polyethylene or EVA, which has good flexibility and is easy to adhere to a bent portion. % Or more.

In the case of the above-mentioned three kinds of film substrates made of materials having different physical properties, the surface layer, the intermediate layer and the supporting layer are laminated in the melt state to form a unitary single film form.

The nonwoven fabric layer 11 is formed by adhering a monofilament nonwoven fabric to the upper surface of the substrate using a thermoplastic adhesive resin and integrating the monofilament nonwoven fabric. The backing agent 18 is applied on the upper surface of the substrate.

The short-fiber nonwoven fabric preferably has a thickness of 30 to 100 micrometers at ¹⁰ to 50 g / m ² . As the material of the nonwoven fabric, PET, PP, nylon, pulp, viscose rayon or the like may be used, but in the present invention, a PET nonwoven fabric having high heat resistance is preferably used. Further, a product improved in heat resistance by using pulp can be used. The shape of the nonwoven fabric may be divided into a short fiber and a long fiber nonwoven fabric. Since the distribution of the long fiber is uneven due to the manufacturing process of the nonwoven fabric, it is difficult to obtain a uniform releasing force when the backing agent is applied. Do.

The above-mentioned nonwoven fabric 11 is integrally adhered to the film substrate 10 by pressing the thermoplastic adhesive resin between the surface of the film substrate and the monofilament nonwoven fabric by means of a cooling roller while melting and flowing the thermoplastic adhesive resin so that the monofilament nonwoven fabric and the film substrate are integrated .

Further, the pressure-sensitive adhesive of the pressure-sensitive adhesive layer 12 formed on the bottom of the film substrate 10 is applied to the release paper so as to be transferred to the bottom of the film substrate and partially cured in a state protected by the release paper.

For this purpose, the pressure-sensitive adhesive is applied to the release paper and transferred to the bottom of the film substrate, followed by aging at 50 to 60 ° C for 24 to 48 hours.

It is preferable that a corona discharge treatment is applied to the bottom surface of the film substrate so that a roughness of a predetermined depth is imparted to the surface of the substrate so that the adhesive agent applied to the bottom surface of the film substrate can be adhered securely.

As the pressure-sensitive adhesive, rubber-based and acrylic pressure-sensitive adhesives except silicone-based pressure-sensitive adhesives are used. Particularly, acrylic pressure-sensitive adhesives include (meth) acrylic acid, 2-ethylhexyl (meth) acrylate, alkyl (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (Meth) acrylate], and 2-hydroxyethyl (meth) acrylate; Di (meth) acrylates such as diethylene glycol di (meth) acrylate and hexanediol di (meth) acrylate; Tri (meth) acrylate such as pentaerythritol tri (meth) acrylate; (Meth) acrylamides such as (meth) acrylamide and N, N-dimethyl (meth) acrylamide, and homopolymers of monomers selected from the aforementioned (meth) acrylic monomers There is a multi-component polymer such as a copolymer made of a monomer or more.

Further, copolymers of the above (meth) acrylic monomers with vinyl compounds other than (meth) acrylic monomers such as vinyl acetate, N-vinylpyrrolidone, N-vinylpiperidone, N-vinylcaprolactam, have.

However, silicon type adhesive is not used because it may leave residue on the masked area and affect the subsequent coating performance.

A crosslinking agent (optional component) is added to the acrylic pressure-sensitive adhesive composition in order to increase the cohesive force and improve the adhesiveness to the adherend. The crosslinking agent is preferably an isocyanate crosslinking agent. Specifically, a polyfunctional aromatic polyisocyanate such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HMDI), trimethylol propane (TMP) Methylene polyphenyl isocyanate, and partially modified products thereof. As other crosslinking agents, those that can be used for crosslinking the (meth) acrylic polymer can be used. For example, melamine-based and modified isocyanate-based resins such as aziridine-based, epoxy-based and metal chelating-based resins can also be used.

After the adhesive layer is applied to the bottom of the film substrate and then protected by the protective layer, the curing agent contained in the adhesive is partially cured by aging at 50 to 60 ° C for 24 to 48 hours, Even if rolled up in a rolled state without using a backing paper, the backing agent does not remain in the adhesive residual nonwoven fabric on the coated single-fiber nonwoven fabric when the tape is released from the roll at the time of use.

The substrate to be coated or the backing agent as a releasing agent is removed from the upper surface layer of the nonwoven fabric by 20 to 30% of the total nonwoven fabric thickness in order to prevent the residue on the single-fiber nonwoven fabric even if the substrate is rolled up for roll- So that the use of the backing agent is optimized by applying the backing agent.

The backing agent 18 may comprise from 60 to 95% by weight of a long chain-alkyl pendant polymer and from 5 to 40% by weight of dimethyl sulfoxide. In addition, the backing agent may include a curing-type silicone resin, and the curing-type silicone resin may be a silicone diacrylate, a silicone hexaacrylate, a silicone polyester acrylate, A silicone rubber, a silicone urethane acrylate, and a silicone urethane methacrylate, and the thermosetting agent includes a melamine-based, platinum catalyst-hardening agent.

Preferably, the release agent is diluted in an amount of 1 to 10 parts by weight with respect to 100 parts by weight of the organic solvent and is dried in the drying chamber at a rate of 50 to 100 m / min at a temperature of 70 to 100 캜.

As a result, the masking tape coated on the bottom of the masking tape and coated with the backing material on the nonwoven fabric on the upper surface has two opposite performances that prevent the scattering by adsorbing the painted paint on the masked area while smoothly releasing It is implemented at the same time. If the backing coat thickness is less than 20% of the thickness of the nonwoven fabric, the adhesive can not be used as a product because the pressure-sensitive adhesive and the nonwoven fabric layer are not united at the time of winding into a roll form. As in the case, since the paint is not adsorbed during the masking of the paint, the hardened paint residue is scattered to contaminate the surroundings.

As described above, the masking tape coated with the backing agent on the nonwoven fabric is aged in a process of aging the adhesive, then the protective layer is removed and rewound in the form of rolls of a unit size to be sold.

Accordingly, since the conventional backing paper on the marketed masking tape wound in a rolled state is not required, there is no problem of delays in the operation time by the separating operation during the masking tape operation and problems such as waste disposal by the backing paper do.

In addition, since the masking tape according to the present invention uses a monofilament nonwoven fabric on the upper surface thereof, the paint coated on the monofilm nonwoven fabric with the masking tape attached thereto is integrated with the monofilament nonwoven fabric so that the paint does not fall off prematurely, Since the tape is removed together when the tape is removed, the problem of contamination of the periphery by the pieces of paint that have been removed from the masking tape in the past is eliminated.

The present invention can be applied to a blasting process as a pretreatment for coating operation in ship drying and a masking tape used in paint coating operation.

10; Film substrate 11; Nonwoven fabric layer
12; Adhesive layer 15: Surface layer
16: intermediate layer 17: support layer

Claims (10)

A surface layer and a support layer having durability in the blast operation, and a film substrate formed of an intermediate layer having flexibility and impact absorption characteristics between the surface layer and the support layer, a staple fiber nonwoven fabric layer adhered to the upper surface thereof, A blasting and paint masking tape for shipbuilding comprising a backing agent applied to an upper surface,
Wherein the surface layer and the support layer of the film base material and the intermediate layers between the surface layer and the support layer are fused and integrally fused in the melt state, wherein 35 to 40% of the total thickness of the film base material is a surface layer, 23 to 28% % Is a support layer, and the surface layer and the support layer are made of one material selected from a rigid PP, MPE and PVC material. The intermediate layer is made of polyethylene having good flexibility and a chain including EVA Type organic resin, and a paint masking tape for shipbuilding.
delete The thermoplastic resin composition according to claim 1, wherein the short-fiber nonwoven fabric has a thickness of 30 to 100 micrometers at ¹⁰ to 50 g / m ² and is made of any one selected from PET, PP, nylon, pulp and viscose rayon, Characterized in that it is integrally attached to the upper surface of the film substrate.
[3] The method of claim 1, wherein the pressure-sensitive adhesive layer is selected from rubber-based and acrylic-based pressure-sensitive adhesives except for silicone-based pressure-sensitive adhesives, and the pressure-sensitive adhesive is applied to the release paper and transferred to the bottom surface of the film- Lt; 0 > C for 24 hours to 48 hours to partially cure the curing agent contained in the pressure-sensitive adhesive.
The method according to claim 4, wherein a corona discharge treatment is applied to the bottom surface of the film substrate so that a pressure sensitive adhesive applied to the bottom surface of the film substrate can firmly adhere, thereby imparting roughness to the surface to a predetermined depth, Masking tape.
The blasting and paint masking tape for shipbuilding according to claim 1, wherein the backing agent is applied from the top surface of the nonwoven fabric to a depth corresponding to 20 to 30% of the total nonwoven fabric thickness.
7. The method of claim 6, wherein the backing agent comprises 60 to 95% by weight of a long chain-alkyl pendant polymer and 5 to 40% by weight of dimethyl sulfoxide. Blast and paint masking tape.
7. The method of claim 6, wherein the backing agent comprises a curable silicone resin, wherein the curable silicone resin is selected from the group consisting of silicone diacrylate, silicone hexaacrylate, silicone polyester acrylate, , A curing catalyst selected from the group consisting of a silicone urethane acrylate and a silicone urethane methacrylate, and a curing catalyst selected from the group consisting of melamine and platinum Blast and paint masking tape for shipbuilding.
The drying agent according to claim 7 or 8, wherein the releasing agent is applied by diluting 1 to 10 parts by weight with respect to 100 parts by weight of the organic solvent and is conveyed at a speed of 50 to 100 m per minute in a drying chamber at a temperature of 70 to 100 캜 Characterized in that the blast and paint masking tape for shipbuilding is blasted.
A method for manufacturing a blast for a shipbuilding and a paint masking tape comprising a film substrate, a short fiber nonwoven fabric layer adhered to the upper surface of the film substrate, a backing agent applied on the upper surface of the nonwoven fabric, and an adhesive layer applied to the bottom surface of the film substrate,
A film substrate is formed in the form of a film in which a surface layer, an intermediate layer and a support layer are integrated as a melt state,
The thermoplastic adhesive resin is melted and flowed between the single-fiber nonwoven fabric and the film substrate made of any one selected from PET, PP, nylon, pulp and viscose rayon and having a thickness of 30 to 100 micrometers at ¹⁰ to 50 g / m ² And pressed by a cooling roller to integrate the film base material and the short-fiber nonwoven fabric,
A backing agent is applied from the top surface of the nonwoven fabric to a depth corresponding to 20 to 30% of the total nonwoven fabric thickness,
The pressure-sensitive adhesive of the pressure-sensitive adhesive layer formed on the bottom surface of the film substrate is applied to the release paper in a thickness of 20 to 70 탆 and transferred to the bottom surface of the film, and then, at 50 to 60 캜 for 24 to 48 hours Wherein the curing is partially cured during the aging process.

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