KR101913540B1 - Fire retardant protective tape for protecting surface of metal material - Google Patents

Abstract

The present invention relates to a fire retardant protective tape for protecting the surface of a metal material. Specifically, the present invention relates to the protective tape, which can be used by being attached to the surface of pipes, paint pipes, and the like for surface protection, wherein the protective tape has flame retardancy, flexibility, adhesiveness and the like, and particularly, does not cause surface damage to the structure even if the tape is attached to the metal structure for a long period of 12 months or more.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a flame retardant protective tape for protecting a surface of a metal material,

The present invention relates to a flame retardant protective tape for surface protection of metal materials. More specifically, the present invention relates to a protective tape which can be attached to and used for surface protection of various structures made of a metal material, for example, pipes, paint pipes, frames and facilities, Flexibility, adhesiveness, and the like, and particularly to a flame retardant protective tape which does not cause surface damage to the structure even if it is attached to a metal structure for a long period of 12 months or more.

In shipbuilding marine industry, various metallic material structures such as a large amount of stainless steel plate, various pipes, painted steel plates and paint pipes are used to dry liquid carrier merchant vessels, and these structures are exposed to the outside It is generally left to stand.

Metal structure structures that are left exposed to the outside may be contaminated or corroded by the welding work that is frequently used in the drying of the merchant ships, foreign matters such as cutting powder or grinding work, or the coating may be damaged, and ultraviolet rays or sea wind Or the surface may be damaged, particularly by welding sparks or fire.

Therefore, protective adhesive tapes are used for protecting the surfaces of these metal material structures. Conventional protective adhesive tapes are mainly formed by coating a polyvinyl chloride (PVC) resin film with an acrylic adhesive, Has a problem that the flexibility of the adhesive tape sharply decreases at low temperatures in winter due to poor cold resistance of the polyvinyl chloride resin and the adhesiveness is significantly insufficient due to the cold resistance problem of the acrylic pressure-sensitive adhesive.

On the other hand, when a resin excellent in cold resistance is applied to polyvinyl chloride resin due to poor cold resistance of the polyvinyl chloride (PVC) resin, a flame retardant is added because of insufficient flame retardancy as compared with polyvinyl chloride resin. And there is a problem that the adhesive property is lowered.

In addition, the conventional adhesive tape is applied to the surface of a painted structure such as a paint pipe or a painted steel plate, and when it is left for a long time, a chemical reaction occurs between the adhesive material of the pressure sensitive adhesive tape and the painted structure, Or the surface is corroded or damaged.

Therefore, it is a protective tape which can be attached and used for surface protection of various structures made of a metal material, for example, a pipe, a paint pipe, and the like, upon drying a liquid carrier main line. The protective tape is excellent in flexibility, In particular, a flame retardant protective tape which does not cause surface damage of the structure even when it is attached to a metal structure for a long period of 12 months or more is in desperate need.

An object of the present invention is to provide a flame-retardant protective tape having flame retardancy and excellent in flexibility, tackiness and the like for surface protection of a metal material.

Another object of the present invention is to provide a flame-retardant protective tape for protecting the surface of a metal material, which does not cause surface damage to the structure even if it is attached to a metal material structure for a long period of 12 months or more.

In order to solve the above problems,

Wherein the inner layer, the middle layer, and the outer layer each comprise a low-density polyethylene resin (LDPE) as a base resin, and the intermediate layer, the outer layer, or the outer layer or the outer layer has a multilayer structure in which an adhesive layer, an inner layer, All of which contain calcium carbonate (CaCO ₃ ), the middle layer comprises a flame retardant, and the adhesive layer comprises a low temperature curable silicone pressure sensitive adhesive.

Here, the low temperature curable silicone pressure sensitive adhesive is cured at 80 to 100 캜.

Also, the outer layer comprises, based on the total weight thereof, 50 to 90 wt% of the low density polyethylene resin (LDPE), 2 to 5 wt% of the UV stabilizer, and 8 to 40 wt% of the calcium carbonate (CaCO ₃ ) Wherein the flame retardant protective tape is a flame retardant protective tape.

Here, the outer layer may be formed of a resin selected from the group consisting of a polypropylene elastomer (PPO), a metallocene polyethylene resin, a linear low density polyethylene resin (LLDPE) and an ethylene propylene diene monomers (EPDM) rubber in addition to the low density polyethylene resin (LDPE) The protective tape further comprising at least one kind of flame retardant protective tape.

The outer layer may comprise 50 to 60% by weight of the low density polyethylene resin (LDPE), the polypropylene elastomer (PPO), the metallocene polyethylene resin, the linear low density polyethylene resin (LLDPE) and the low density polyethylene resin Characterized in that it comprises 10 to 30% by weight of one or more resins selected from the group consisting of said EPDM rubbers, 2 to 5% by weight of said UV stabilizers and 5 to 10% by weight of said calcium carbonate (CaCO ₃ ) Tape.

The flame retardant may include decabromodiphenylethane (DBDPE), decabromodiphenyloxide (DBDPO), all of them, or phosphorus flame retardant.

The middle layer comprises 60 to 90% by weight of the low density polyethylene resin (LDPE), 10 to 30% by weight of the flame retardant, 1 to 5% by weight of pigment and 5 to 30% by weight of calcium carbonate (CaCO ₃ ) By weight based on the total weight of the flame retardant protective tape.

The intermediate layer may contain 40 to 70% by weight of the low density polyethylene resin (LDPE) based on the total weight thereof, one kind selected from the group consisting of the metallocene polyethylene resin, the linear low density polyethylene resin (LLDPE) and the EPDM rubber By weight of a flame retardant, 10 to 40% by weight of the above resin, 20 to 40% by weight of the flame retardant, and 1 to 5% by weight of a pigment.

The thickness of the intermediate layer is in the range of 20 to 80 占 퐉, and the thickness of the adhesive layer is in the range of 3 to 20 占 퐉. Wherein the flame retardant protective tape is a flame retardant protective tape.

The flame retardant protective tape according to the present invention exhibits excellent effects in that flame retardancy is realized through a new laminate structure, and properties such as flexibility and tackiness are improved.

Further, the flame retardant protective tape according to the present invention exhibits an excellent effect that does not cause surface damage of the structure even if the flame retardant protective tape is attached to the structure of the metal material through the adhesive layer for a long period for 12 months or more.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing one embodiment of a lamination structure of a flame retardant protective tape according to the present invention. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Like reference numerals designate like elements throughout the specification.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view showing one embodiment of a laminated structure of a flame retardant protective tape according to the present invention. FIG.

1, the flame-retardant protective tape according to the present invention may have a multi-layer structure in which an adhesive layer 10, an inner layer 20, an intermediate layer 30, and an outer layer 40 are sequentially laminated from below.

Specifically, the outer layer 40 is a layer that protects the protective tape from an external impact, pressure, ultraviolet rays, or the like, and particularly performs a function of assisting the flame retardancy of the protective tape. An olefin resin, for example, a polyethylene resin (PE), preferably a low density polyethylene resin (LDPE), a polypropylene resin, preferably a polypropylene elastomer (PPO), a metallocene polyethylene resin, a linear low density polyethylene resin (LLDPE), ethylene propylene diene monomers (EPDM) Rubber, and the like.

The olefin resin has excellent cold resistance as compared with polyvinyl chloride (PVC) resin generally used in conventional protective tapes, so that flexibility can be maintained even in winter so that adhesion of the protective tape to the attachment structure can be maintained. In addition, when the low density polyethylene resin (LDPE) and the polypropylene elastomer (PPO) are used in a specific blending ratio, the flexibility and adherence of the protective tape can further be improved.

In addition, the metallocene polyethylene resin, the linear low density polyethylene resin (LLDPE), the EPDM rubber and the like may have a somewhat lower flame retardancy than the low density polyethylene resin (LDPE), but they are excellent in elasticity and tear strength, The protective tape can be prevented from being torn or broken when the protective tape is attached.

Here, the metallocene polyethylene resin is a polyethylene resin polymerized under a metallocene catalyst, and has superior mechanical and optical properties to a general polyethylene resin. The metallocene is a generic name of a bis (cyclopentadienyl) metal which is a novel organometallic compound in which cyclopentadiene and a transition metal are bonded in a sandwich structure. The general formula of the simplest structure is M (C ₅ H ₅ ) ₂ Ti, V, Cr, Fe, Co, Ni, Ru, Zr, Hf, etc.). Since the polyethylene polymerized under the metallocene catalyst has a low catalyst residual amount of about 200 to 700 ppm, it is possible to suppress or minimize the deterioration of the physical properties of the composition containing the polyethylene by the residual amount of the catalyst. , A UV stabilizer, calcium carbonate (CaCO ₃ ), and the like.

In addition, the UV stabilizer acts to protect the protective tape from external ultraviolet rays, and the calcium carbonate (CaCO ₃ ) improves the tensile strength of the protective tape to suppress damage or tearing of the protective tape due to external impact And the content of the flame retardant contained in the intermediate layer 30 to be described later is reduced so as to suppress the deterioration of the mechanical properties and the like due to the addition of a large amount of the flame retardant, The environmental problem can be alleviated and the production cost of the protective tape can be reduced by reducing the content of the base resin.

For example, the content of the low density polyethylene resin (LDPE) is 50 to 90 wt%, the content of the polypropylene elastomer (PPO) is 0 to 30 wt%, the content of the UV The stabilizer may be 2 to 5 wt%, and the calcium carbonate (CaCO ₃ ) may be 0 to 40 wt%.

Preferably, the content of the low density polyethylene resin (LDPE) is 50 to 90% by weight, the amount of the UV stabilizer is 2 to 5% by weight, the content of the calcium carbonate (CaCO ₃ ) The content may be from 8 to 40% by weight. The content of the low density polyethylene resin (LDPE) is 50 to 60% by weight based on the total weight of the outer layer 40, the content of the polypropylene elastomer (PPO), the metallocene polyethylene resin, the linear low density polyethylene resin (LLDPE), 10 to 30% by weight of the EPDM rubber, 2 to 5% by weight of the UV stabilizer, 0 to 10% by weight of the calcium carbonate (CaCO ₃ ) 10% by weight.

If the content of the low density polyethylene resin (LDPE) is below the reference value or the content of the polypropylene elastomer (PPO) exceeds the standard value, the mechanical strength of the outer layer 40 is insufficient, On the other hand, when the content of the low density polyethylene resin (LDPE) exceeds the standard value or the content of the polypropylene elastomer (PPO) is below the standard value, the flexibility, tear strength and the like of the protective tape are insufficient, The adhesion to the object may be greatly deteriorated.

If the content of the low density polyethylene resin (LDPE) is below the reference value or the content of the metallocene polyethylene resin, the linear low density polyethylene resin (LLDPE), the EPDM rubber or the like exceeds the standard, the flame retardancy of the outer layer 40 is insufficient On the other hand, when the content of the low density polyethylene resin (LDPE) exceeds the standard or the content of the metallocene polyethylene resin, the linear low density polyethylene resin (LLDPE), the EPDM rubber and the like is below the standard, flexibility, workability And the adhesion of the protective tape to the object to be adhered may be greatly deteriorated.

In addition, if the content of the UV stabilizer exceeds the standard, the moldability of the protective tape may be significantly lowered. If the content of calcium carbonate (CaCO ₃ ) is below the reference value, the mechanical strength and flame retardancy of the protective tape may be insufficient and the manufacturing cost may be increased. On the other hand, if the content exceeds the standard value, have.

The intermediate layer 30 implements the function of realizing the flame retardancy of the protective tape. Accordingly, the intermediate layer 30 may further include a polyolefin resin, preferably a low density polyethylene resin (LDPE) as a base resin, and may further contain additives such as a flame retardant agent, a pigment, and calcium carbonate (CaCO ₃ ). The low density polyethylene resin (LDPE) included in the middle layer 30 is the same as the low density polyethylene resin (LDPE) included in the outer layer 40 for improving the adhesion between the middle layer 30 and the outer layer 40 .

The intermediate layer 40 may further include the metallocene polyethylene resin, the linear low density polyethylene resin (LLDPE), and the ethylene propylene diene monomers (EPDM) rubber in addition to the low density polyethylene resin (LDPE) as the base resin.

The flame retardant may include halogen-based flame retardants such as decabromodiphenylethane (DBDPE) and decabromodiphenyloxide (DBDPO), which are excellent in flame retardancy, and phosphorus-based flame retardants. If the flame retardant is included in the outer layer 40, it is preferable that the flame retardant is included in the middle layer 30 because the mechanical properties of the outer layer 40 may be deteriorated. The content of the flame retardant contained in the middle layer 30 can be reduced due to flame retardancy assisting by calcium carbonate (CaCO ₃ ) contained in the outer layer 40, the outer layer 40 and the middle layer 30 .

It is preferable that the pigment is included in the middle layer 30 because the pigment functions to add color to the protective tape and can be discolored by ultraviolet light when included in the outer layer 40. [ In addition, the calcium carbonate (CaCO ₃ ) may be included in the middle layer 30 as well as the outer layer 40, and may perform the same function as the calcium carbonate (CaCO ₃ ) included in the outer layer 40.

For example, the content of the low density polyethylene resin (LDPE) is 60 to 90% by weight, the content of the flame retardant is 10 to 30% by weight, the content of the pigment is 0 to 3% by weight based on the total weight of the middle layer 30, For example, 1 to 5% by weight, and the content of calcium carbonate (CaCO ₃ ) may be 0 to 30% by weight, for example, 5 to 30% by weight.

When the intermediate layer 30 includes a metallocene polyethylene resin, a linear low density polyethylene resin (LLDPE), an EPDM rubber, etc. in addition to the low density polyethylene resin (LDPE) as a base resin, the total weight of the middle layer 30 The content of the low density polyethylene resin (LDPE) is 40 to 70 wt%, the content of the metallocene polyethylene resin, the low density polyethylene resin (LLDPE) and the EPDM rubber is 10 to 40 wt%, the content of the flame retardant And the content of the pigment may be 0 to 5% by weight, for example, 1 to 5% by weight.

The inner layer 20 can prevent the flame retardant of the intermediate layer 30 from migrating to the adhesive layer 10 described later. When the flame retardant contained in the intermediate layer 30 moves to the adhesive layer 10, the adhesion of the adhesive layer 10 and the adhesion to the object to be adhered thereto may be significantly deteriorated, .

The inner layer 20 may contain an olefin resin, preferably a low density polyethylene resin (LDPE) as a base resin. To improve interlayer adhesion, the low density polyethylene resin (LDPE) It may be the same resin as the polyethylene resin (LDPE).

The adhesive layer 10 functions to realize attachment of the protective tape to the attached structure. In the case of the conventional protective tape, the adhesive layer 10 is generally formed of a rubber adhesive or an acrylic adhesive having a low average molecular weight of 200,000 to 500,000. However, such a conventional adhesive is easily damaged by ultraviolet rays, There is a problem that the adhesive is lost due to a chemical reaction with the coating or the coating is damaged.

Therefore, in the present invention, a low temperature curable silicone pressure sensitive adhesive is used as the pressure sensitive adhesive layer (10). The low temperature curing type silicone pressure sensitive adhesive is cured at about 80 to 100 DEG C so that the inner layer 20 to the outer layer 40 may not be damaged by heat when the pressure sensitive adhesive layer 10 is cured, Even when the protective tape is attached to a paint pipe or the like, the pressure-sensitive adhesive does not react with the paint or the like, so that the adhesion is maintained during long-term adhesion for 12 months or more and the damage of the paint is prevented .

The thickness of the outer layer 40 and the thickness of the inner layer 20 are each independently about 10 to 50 占 퐉. The thickness of the outer layer 40 and the thickness of the inner layer 20 may be about 50 to 180 占 퐉, preferably about 120 to 150 占 퐉, , The thickness of the middle layer 30 is about 20 to 80 占 퐉, and the thickness of the adhesive layer 10 is about 3 to 20 占 퐉.

Since the middle layer 30 is added with a flame retardant, it is preferable to form the middle layer 30 slightly thicker than the outer layer 40 and the inner layer 20 in order to ensure moldability and suppress property deterioration due to the addition of the flame retardant.

The flame retardant protective tape according to the present invention has flame retardancy of the same level (VTM-0 to 2) as that of the conventional polyvinyl chloride resin-based adhesive tape by the laminate structure of the new material and structure and the low temperature curing type silicone adhesive layer as described above And at the same time, has excellent flexibility, adhesiveness and the like, and can exhibit an excellent effect that does not cause surface damage of the structure even if it is attached to a metal structure for a long period of 12 months or more.

[Example]

1. Manufacturing Example

Protective tapes (total thickness: 130 占 퐉, adhesive layer thickness: 5 占 퐉) were produced with the constitutions described in Table 1 below.

Example Comparative Example One 2 3 4 5 6 7 One 2 3 4 5 6 7 8

Outer layer
(content;
weight%) Resin 1 60 88 75 65 65 65 65 100 Resin 2 10 Resin 3 30 Resin 4 20 10 Additive 1 35 10 10 10 30 30 Additive 2 5 2 5 5 5 5 5

Middle layer
(content;
weight%) Resin 1 80 70 60 55 55 60 65 100 Resin 2 20 30 Flame Retardant 1 15 30 20 10 20 10 Flame Retardant 2 30 Additive 1 20 30 Pigment 5 5 5 5 Inner layer
(content;
weight%) Resin 1 100 100 100 100 100 100 100 100 Adhesive layer
(Thickness: 탆) Adhesive 1 5 10 5 7 5 15 5 Adhesive 2 5 7 10 15 Adhesive 3 5 7 10 15

- Resin 1: Low density polyethylene resin (LDPE)

- Resin 2: Metallocene polyethylene resin

- Resin 3: Linear low density polyethylene resin (LLDPE)

- Resin 4: EPDM rubber

- Additive 1: Calcium carbonate

- Additive 2: UV stabilizer

- Flame retardant 1: decabromodiphenylethane (DBDPE)

- flame retardant 2: phosphorus flame retardant

- Adhesive 1: Low temperature curable silicone adhesive

- Adhesive 2: Acrylic adhesive

- Adhesive 3: Rubber adhesive

2. Property evaluation

1) Evaluation of tensile strength and elongation

Tensile strength and elongation were measured for each of the longitudinal direction (MD) and the width direction (TD) of the tape according to the standard KS T 1028 for each of the protective tape specimens of Examples and Comparative Examples.

2) Evaluation of flame retardancy

The protective tape specimens of each of the examples and comparative examples were subjected to a Thin and Material Verical Burning Test according to the standard UL-94 to evaluate the flame retardancy VTM-0 to 2 satisfactory.

3) Cold resistance evaluation

For each of the protective tape specimens of the examples and comparative examples, the cold resistance was evaluated by measuring the adhesion at minus 10 degrees in accordance with the standard KS T 2018.

4) Evaluation of stain resistance

Examples and Comparative Examples Each of the protective tape specimens was attached to a SUS-304BA specimen in a constant temperature and humidity chamber at 60 ° C and 90% humidity, and allowed to stand for 96 hours. (X) when there was no adhesive transition and (X) when the adhesive was transferred.

The evaluation results of the physical properties are shown in Table 2 below.

Tensile strength (kgf / 25mm) Elongation (%) Flammability
(VTM-0 to VTM-2) Adhesion (gf / 25mm) Stain resistance
(○ / ×) MD direction TD direction MD direction TD direction Example 1 4.5 3.5 450 300 VTM-2 40 ○ Example 2 5.0 4.0 450 300 VTM-0 120 ○ Example 3 5.5 4.5 550 450 VTM-1 40 ○ Example 4 6.5 5.5 650 550 VTM-2 60 ○ Example 5 6.5 5.5 650 600 VTM-1 100 ○ Example 6 6.5 5.5 650 550 VTM-2 150 ○ Example 7 4.5 3.5 450 350 VTM-1 60 ○ Comparative Example 1 4.0 3.0 400 200 Bad 30 × Comparative Example 2 4.0 3.0 400 200 Bad 10 × Comparative Example 3 4.5 3.5 400 200 Bad 10 × Comparative Example 4 4.0 3.5 400 250 Bad 100 × Comparative Example 5 4.0 3.0 400 200 Bad 100 × Comparative Example 6 4.0 3.0 400 200 Bad 70 × Comparative Example 7 4.5 3.5 400 200 Bad 70 × Comparative Example 8 4.0 3.5 400 250 Bad 200 ×

As shown in the above table, the protective tapes of Examples 1 to 7 according to the present invention have excellent physical properties such as mechanical strength and elongation, realize flame retardancy of VTM-0 to 2, And the pressure-sensitive adhesive transfer is inhibited, thereby confirming that the problems such as contamination and coating problems can be solved.

On the other hand, it was confirmed that the protective tape of the comparative example had lowered in physical properties such as mechanical strength, elongation, cold resistance and the like in comparison with the protective tape of the examples on the assumption that the thickness of the protective tape was the same. Particularly, It was predicted that the protective tape of the comparative example would cause contamination of the attached structure due to pressure-sensitive adhesive transfer, paint damage, and the like.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims. . It is therefore to be understood that the modified embodiments are included in the technical scope of the present invention if they basically include elements of the claims of the present invention.

10: Adhesive layer 20: Inner layer
30: middle layer 40: outer layer

Claims (9)

Layer structure in which an adhesive layer, an inner layer, an intermediate layer and an outer layer are sequentially laminated from below,
Wherein the inner layer, the middle layer and the outer layer each comprise a low density polyethylene resin (LDPE) as a base resin,
The intermediate layer further comprises a metallocene polyethylene resin in addition to a low-density polyethylene resin (LDPE) as a base resin,
The outer layer additionally contains EPDM (ethylene propylene diene monomer) rubber as a base resin in addition to a low density polyethylene resin (LDPE)
The middle layer or the outer layer or both comprise calcium carbonate (CaCO ₃ )
Wherein the middle layer comprises a flame retardant,
Wherein the outer layer does not include a flame retardant and a pigment,
The flame retardant may include decabromodiphenylethane (DBDPE), decabromodiphenyl oxide (DBDPO), or both,
Wherein the pressure-sensitive adhesive layer comprises a low-temperature curable silicone pressure-sensitive adhesive which is cured at 80 to 100 DEG C,
Wherein the outer layer does not include a flame retardant and a pigment,
Wherein the middle layer comprises 40 to 70% by weight of the low density polyethylene resin (LDPE), 10 to 40% by weight of the metallocene polyethylene resin, 20 to 40% by weight of the flame retardant, and 0 to 5% Lt; / RTI >
Wherein the outer layer comprises 60 to 90 wt% of the base resin, based on the total weight of the outer layer. delete The method according to claim 1,
Wherein said outer layer comprises 2 to 5 wt% of a UV stabilizer and 8 to 10 wt% of said calcium carbonate (CaCO ₃ ), based on the total weight of said outer layer. The method of claim 3,
Wherein the outer layer comprises a resin selected from the group consisting of a polypropylene elastomer (PPO), a metallocene polyethylene resin and a linear low density polyethylene resin (LLDPE) in addition to the low density polyethylene resin (LDPE) and the ethylene propylene diene monomers Wherein the flame retardant protective tape further comprises a thermoplastic resin. delete The method according to claim 1,
Flame retardant protective tape characterized by adding a phosphorus flame retardant. delete delete The method according to claim 1,
The total thickness is 50 to 180 占 퐉 and the thicknesses of the outer layer and the inner layer are independently 10 to 50 占 퐉, the thickness of the middle layer is 20 to 80 占 퐉 and the thickness of the pressure sensitive adhesive layer is 3 to 20 占 퐉. Resistant flame retardant protective tape.

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