KR100558359B1 - Anti-stick film and joint anti-stick sheet with same - Google Patents

Abstract

The present invention relates to an anti-sticking film and a joint anti-sticking sheet having the same, and more particularly, to prevent the joints between the sheets from sticking to each other, and to facilitate the connection by treating the joints in a hot air fusion method. It relates to a prevention film and a joint anti-sticking sheet having the same. The anti-sticking film 20 according to the present invention is formed on the edge joint portion of the sheet body 10 to prevent adhesion between the joint portions, and is melted integrally with the sheet body 10 when hot air is applied. do. The joint anti-adhesion sheet provided with such an anti-sticking film exhibits a remarkable effect compared to the prior art in water permeability, adhesive performance, overlapping bendability, and the like.

Adhesion, Adhesion, Sheet, Waterproof, Polyamide

Description

Anti-sticking film and joint anti-sticking sheet having same {Adhension preventing film and thermplatic sheet equipped with it}

1 is a perspective view showing one embodiment of a joint anti-stick sheet according to the present invention.

Figure 2a is a cross-sectional view showing one embodiment of a joint anti-stick sheet according to the present invention.

Figure 2b is a cross-sectional view showing another embodiment of a joint anti-sticking sheet according to the present invention.

Figure 3 is a process diagram showing a method of manufacturing a joint anti-sticking sheet according to the present invention.

Figure 4 is a schematic diagram showing the calender process in the manufacture of the joint anti-stick treatment sheet according to the present invention.

Figure 5 is an operation showing the state of separating the release film from the anti-sticking film of the joint anti-sticking treatment sheet according to the present invention.

6 is a cross-sectional view showing a state in which the overlapping portions of the joint anti-sticking treatment sheet according to the present invention overlap each other.

7 is an operation diagram showing a state in which the joint portions of the joint anti-sticking sheet according to the present invention are fused with each other by hot air.

<< Description of the code for the main part of the drawing>

1: sheet 10: sheet body

20: anti-stick film 30: release film

41: upper cover material 42: lower cover material

The present invention relates to an anti-sticking film and a joint anti-sticking sheet having the same, and more particularly, to prevent the joints of the sheets from sticking to each other, and to connect the joints in a hot air fusion method. It relates to an adhesive sheet to be provided.

When the existing adhesive sheet (Sheet) is developed by continuous overlapping, for example, when constructing a waterproof asphalt sheet, the edges of the adhesive sheet are connected to overlap each other, the treatment technology of the joint is the most important It is recognized as a technology and three ways of dealing with it are generally known. There are an adhesion method, a welding method, and a fusion method, and the method is determined according to the kind and properties of the material constituting the sheet.

Adhesion method is a treatment method to secure the adhesive strength by applying a high viscosity adhesive. However, since the adhesive method forms a hardened product with a hard adhesive component on the surface of the sheet, it takes a long time to obtain a high-density cured product, and the fixing force is determined by the application amount and the application method of the worker. The problem of not being able to connect is known.

The welding method is a method in which the overlapping parts of sheets are dissolved by applying a low-viscosity organic solvent type adhesive to dissolve the surface of the overlapping upper and lower sheets. This treatment method is difficult to secure the adhesive force due to the amount of the adhesive, foreign matter on the surface of the lower sheet material, moisture, condensation, etc., there is a problem that it is not easy to secure the watertightness due to the pot life of the adhesive and the working conditions. In particular, attention should be paid to the width of the joint and the effect of the adhesive.

The fusion method is a method of integrating the molten sheet material surface by using a high temperature heat source and compressing it to integrate the other method. At this time, a high-temperature heat source is usually a torch, and the joint treatment and the bottom sheet bonding are simultaneously processed by heating the heat on the surface of the sheet to be melted using propane gas as a fuel and installing the sheet in a molten state. That's the way. However, the above-described method of fusion by torch also has problems such as sheet layer damage, breakage, penetration, etc. due to direct fire according to the skill of the operator.

On the other hand, in the case of a non-adhesive sheet according to the present invention and the technical field, for example, the material of the sheet is polyvinyl chloride resin (Poly Vinyl Chloride), ethylene acetate vinyl resin (Ethylene Vinyl Acetate), polyethylene resin (Poly Ethylene) ), In the case of ethylene-polymer-bitumen (Ethylene Copolymer Bitumen) series, a fusion method using a hot air fusion machine is adopted, and a construction method of melting and connecting a sheet surface with hot air is used. This hot air fusion method is a more advanced method that can ensure the stability of work, ease of handling and uniformity of construction quality.However, in the case of adhesive sheets, the sheets are adhered to each other when the sheets are in contact with each other. When fused by itself, the adhesive strength is lowered and thus could not be introduced into the adhesive sheet.

The present invention has been made to solve the above problems, it is an object of the present invention to provide an anti-stick film to prevent the mutual adhesion of the adhesive sheet.

Another object of the present invention is to provide a method for producing an anti-stick film.

Still another object of the present invention is to provide a joint anti-sticking treatment sheet in which the joint portions of the sheets are bonded to each other by a hot air fusion method, and the anti-sticking film and the sheet body are integrally melted.

Still another object of the present invention is to provide a method for manufacturing and constructing a joint anti-stick sheet.

Anti-sticking film according to the present invention is characterized in that the heat-resistant polyamide-based resin to prevent the adhesion between the adhesive sheets as a main component.

At this time, the heat resistant polyamide-based resin preferably has a melting point of 180 ° C. or more, a softening point of 173 ° C. to 183 ° C., and an elongation of 400% to 700%.

On the other hand, the anti-sticking film may be formed by melting the heat-resistant polyamide-based resin at 180 ℃ to 240 ℃ applied to the release film composed of a release material in a thickness of 40 ㎛ to 100 ㎛.

At this time, the release film is based on the PET-based resin, it is preferable that both sides of the release treatment.

In addition, the joint anti-adhesive sheet according to the present invention is characterized in that it comprises a sheet body made of a thermoplastic adhesive material having a predetermined width and an anti-stick film provided in one section of the sheet body.

At this time, the anti-sticking film is provided with an upper anti-sticking film formed along the upper surface of one side edge of the sheet body and a lower anti-sticking film formed along the bottom of the other side edge.

Hereinafter, the present invention will be described in more detail with reference to the drawings showing embodiments. However, the technical idea of the present invention is not limited to the embodiments to be described below, and will include a range that can be easily modified by those skilled in the art.

1 is a perspective view showing an embodiment of an adhesive sheet according to the present invention, Figure 2 is a cross-sectional view of FIG. According to this, the sheet 1 is largely the sheet body 10, the anti-stick film 20 formed on the edge of the sheet body 10, the release film 30 coated with the anti-stick film 20, and the upper and lower parts It is comprised including the application materials 41 and 42.

The seat body 10 may have a predetermined width and may be extended to be wound. At this time, the seat body 10 is formed of an adhesive material, which includes asphalt-based asphalt, improved asphalt, rubber asphalt, recycled asphalt, etc., and a tackyfier such as coumarone indene resin. There is no limitation as long as the material has thermoplastic adhesive properties.

The sheet body 10 is constructed so that the edges overlap each other in normal use, and the anti-sticking film 20 is fused between the overlapping joint portions to connect the sheet bodies 10 to each other. At this time, the anti-sticking film 20 is usually formed on the upper side of one side edge and the lower side of the other side edge of the sheet body 10 to facilitate the connection, for convenience of description, fusion welding on the upper side of one side edge of the sheet body 10 The anti-sticking film to be referred to as the upper anti-sticking film (20a), the anti-sticking film to be fused to the lower side of the other side is called the lower anti-sticking film (20b). At this time, it will be obvious that the width of the anti-sticking film does not exceed half, and it is usually about 1/3 to 1/10 of the width of the sheet body 10.

The anti-stick film 20 is typically composed of polyamide (Poly Amid) resin, because it forms a film with high heat resistance and rapid cooling, and thus does not require drying time in manufacturing, and thus has the most suitable material characteristics. to be. At this time, it is preferable that the melting point has a material characteristic of 400% to 700% at 180 ° C., softening point 173 ° C. to 183 ° C., tensile strength 23 ° C., 6 to 7 kg / cm ² , and extension ratio 23 ° C.

The reason why the material properties as described above are described in more detail, because the anti-stick film 20 performs two functions in the present invention. First, it melts when high temperature hot air is applied, and secondly, the adhesive function bonds the sheets to each other, and secondly, it does not melt within the melting temperature range of the adhesive material constituting the sheet body 10, and maintains a solid state of the sheet body ( It is a function to prevent 10) from adhering to other materials.

That is, when the melting point is lower than 180 ° C the adhesion preventing film is a high temperature thermoplastic adhesive material, for example, the asphalt in the melting state of 140 ° C to 160 ° C, the coated anti-stick film 20 is melted at the moment of contact with the sheet This is because the formation of the anti-sticking layer becomes difficult, and when the elongation is 400% or less, the breakage shape of the anti-sticking film 20 is generated because the sheet 1 cannot withstand tension.

On the other hand, the anti-stick film 20 is preferably prepared by being coated on the release film 30 to be described below. That is, it is preferable to apply 180 degreeC-240 degreeC flexible polyamide melt to 40 to 100 micrometers thickness to the release film 30, and to manufacture it. When the coating thickness of the polyamide melt is 40 μm or less, it is impossible to form a uniform film during the production of the anti-stick film 20, and when the thickness is formed to 100 μm or more, the melt rate is slowed down when heated by hot air, thereby reducing work efficiency. Of course, this may cause deformation and damage to the sheet material. More preferably, the thickness of the anti-sticking film 20 layer is 60 μm to 80 μm, which is advantageous in terms of production efficiency, quality control, and construction.

In addition, the coating temperature of the polyamide melt is 180 ℃ to 240 ℃, when the temperature is 180 ℃ or less, the melt viscosity is high, the coating workability is insufficient, and if the 240 ℃ or more, the processing characteristics disappear due to the carbonization of the flexible polyamide to be. In particular, 190 ℃ to 220 ℃ is more preferable because it has a stable coating conditions and properties.

The release film 30 is a film layer provided as a release material to protect the anti-sticking film 20. For convenience of description, the release film 30 provided on the upper anti-sticking film 20a is disposed on the upper release film 30a. This, the release film 30 provided on the lower anti-sticking film 20b is referred to as the lower release film 30b.

The release film 30 is typically formed based on polyethylene terephthalate (PET) resin. This is because the PET-based resin is not deformed or melted even when the flexible flexible polyamide resin forming the anti-sticking film 20 contacts. In addition, it is preferable that the release film 30 is released on both sides. In the case of the release film processed on one side, when the winding treatment is performed by heat generated during cooling after coating the polyamide forming the anti-sticking film, the adhesive film adheres to the back surface. This is because peeling between the anti-adhesive flexible polyamide film and the release film occurs, making the sheet impossible.

In addition, an upper application material 41 and a lower application material 42 for protecting the sheet body 10 are further provided at portions outside the edge of the sheet body 10 in which the release film 30 is formed. Each application material is formed to protect and block the adhesive sheet body 10 from external foreign matter, and reinforcement coating type sheet material, release film, and torch as a reinforcing material for the nonwoven fabric and the nonwoven fabric according to the application and utilization of the sheet. One or two or more of film, silica sand (micro) powder, silica sand powder, PP woven fabric is combined.

On the other hand, Figure 2b is a cross-sectional view showing another embodiment of a joint anti-sticking sheet according to the present invention. It is comprised so that the upper application material 41 may extend by the width | variety of a joint part outside an edge. This extension 380 is intended to be used as a direct reinforcing material, without the additional reinforcing material after the sheet adhesive treatment, without a separate reinforcing material.

Next, a method of manufacturing a joint anti-sticking sheet according to the present invention will be described. Figure 3 is a schematic diagram showing a manufacturing process of the joint anti-sticking sheet according to the present invention. In general, the sheet 1 is rolled by extruding the molten adhesive material into the calender roll 51, and at the same time, the upper applying material 41 and the lower applying material 42 are fused to the adhesive front and rear surfaces, and then cooled. It is made by the process of winding up and winding up. That is, it is manufactured including an extrusion process, a calender process, a cooling process, and a winding process, but this process is known to those skilled in the art, so a detailed description thereof is omitted on the page.

Meanwhile, in order to manufacture the sheet 1 according to the present invention, a process of applying a polyamide melt, which is a material of the anti-sticking film 20 to the release film 30, and coating the release film 30 coated thereon A separate manufacturing process for fusion bonding to the sheet body 10 is required. Application of the polyamide melt to the release film 30 is performed by melting the polyamide to 180 to 240 ° C. as described above, followed by continuous coating to apply the melt to a thickness of 40 μm to 100 μm. (See Figure 2)

In this way, the release film 30 coated with the anti-sticking film 20 is fused to the sheet body 10 together with the upper application material 41 and the lower application material 42 during the calendering process. 4 is a schematic diagram illustrating an embodiment of a calendar process in more detail. According to this, the calender device is provided with an extruded portion 52 through which an adhesive material such as asphalt is extruded, and a calender roll 51 for rolling the adhesive material.

At the inlet of the calender roll 51, the release films 30a and 30b coated with the upper application material 41, the lower application material 42, and the anti-sticking films 20a and 20b outside the application materials 41 and 42. And an adhesive material of the upper extrusion part 52 is provided. They are rolled while passing through the calender roll 51, wherein the adhesive material constitutes the sheet body 10, the upper applying material 41 is on the upper sheet, the lower applying material 42 is on the lower sheet, and the upper anti-stick film The 20a and the upper release film 30a are positioned on the upper edge of the sheet body one side edge, and the lower anti-sticking film 20b and the lower release film 30b are respectively positioned on the lower edge of the other side of the sheet body to form an adhesive sheet. .

Next, the bonding method of the sheet | seat concerning this invention is demonstrated. 5 is a cross-sectional view showing a state in which the release film 30 of the sheet according to the present invention is separated from the anti-sticking film, and FIG. 6 is an operation diagram showing a state in which the joint layers of the sheet according to the present invention overlap each other. 7 is an operation diagram showing a state in which the overlapping portions of the sheet according to the present invention are fused with each other by hot air.

Since different sheets are bonded to each other, for convenience of explanation, the same two adhesive sheets are referred to as the first sheet 2 and the second sheet 2 ', respectively. First, the sheets 2, 2 'are developed in their place of use, in accordance with the purpose of the sheets. Since the release film 30 is still attached to the developed sheets 2 and 2 ', the release film 30 is removed. Although the anti-sticking film 20 is coated on the release film 30 at the time of manufacture, the anti-sticking film 20 fused to the sheet body 10 while passing through the calender roll 51 is more than the sheet body 10. Since it is strongly coupled, even if the release film 30 is removed, it is not removed like the release film 30 and remains on the sheet body 10 as shown in FIG. 5.

Subsequently, the upper adhesive film 20a of the first adhesive sheet 2 and the lower adhesive film 20b of the second adhesive sheet 2 'are exactly overlapped with each other. At this time, in the case of the conventional adhesive sheet having adhesive strength even at room temperature without the anti-sticking film (20), the sheet body 10 is adhered to each other in the overlapping process, it is not easy to overlap the work, foreign matter adheres to the overlapping portion In many cases, the adhesive force is lowered, and surface condensation due to the working temperature occurs, but the sheet according to the present invention is provided with the anti-sticking film 20 to prevent adhesion, so that the work can be quickly and accurately overlapped.

Subsequently, hot air is applied to the stacked sheets 2, 2 'by using a hot air fan. At this time, the temperature during hot air heating should be heated above the temperature at which the anti-sticking film 20 can be melted. The anti-stick film 20 melted by heating diffuses into the adhesive material of the sheet body and does not remain on the surface, so that the sheet bodies 10 are adhered to each other. Even in this case, unless the anti-sticking film 20 having the anti-sticking function, the sheet body 10 is softened by the temperature of the nozzle portion from which the hot air comes out, and the sheet material is entangled in the nozzle of the hot air, making the operation impossible.

The pressure-sensitive adhesive sheet prepared according to the present invention having the above-described configuration showed a remarkable effect in water permeability, adhesive performance, and joint portion bending property, and the results are shown in Table 1 compared with the prior art.

Although the present invention has been described with reference to the preferred embodiments mentioned above, many other possible modifications and variations can be made without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications and variations as fall within the true scope of the invention.

Evaluation item Adhesive sheet of the present invention Conventional adhesive sheet Test method and condition Condition                                              Anti-stick Film with Anti-sticking Function Sheet with adhesive function Indirect Hot Air Work Overlap Permeability 1kg / cm ² , 24 clear clear KS F 4918 Permeability Test Method 3.1kg / cm ² , 24 hours clear Pitcher Folding performance (kg / cm ² ) Standard condition 12.5 9.1 KS F 4917 Bonding Tensile Test Method Alkali treatment 11.7 7.6 Promotional Exposure Treatment 10.2 5.3 Overlap Flexibility -15 ℃ / 30 minutes clear Peeling, breaking KS F 4917 Flexural Performance Test Method 5 ℃ / 30 minutes treatment clear Surface crack

Claims (11)

Adhesion-proof film whose main component is heat-resistant polyamide resin which prevents adhesion between adhesive sheets. The method according to claim 1, Heat-resistant polyamide-based resin is an anti-sticking film, characterized in that the melting point is 180 ℃ or more, softening point 173 ℃ to 183 ℃, elongation rate 400% to 700%. Melting the heat-resistant polyamide-based resin at 180 ℃ to 240 ℃ is a method for producing an anti-stick film, characterized in that applied to the release film composed of a release material to a thickness of 40 ㎛ to 100 ㎛. The method according to claim 3, The release film is based on the PET-based resin, both sides of the release method for producing an anti-sticking film, characterized in that the release treatment. A sheet body made of a thermoplastic adhesive material having a predetermined width; And Joint anti-tack treatment sheet, characterized in that it comprises a; anti-stick film of claim 1 or 2 provided in one section of the sheet body. The method according to claim 5, Joint anti-sticking sheet, characterized in that the anti-stick film is provided with an upper anti-stick film formed along the upper surface of one side edge of the sheet body and a lower anti-stick film formed along the bottom of the other side edge. The method according to claim 6, The upper and lower application materials are provided on the sheet body on which the anti-sticking film is not laminated, and the application materials are non-woven fabric and a non-woven fabric, a reinforcement coating type sheet material using a non-woven fabric, a release film, a torch film, a silica sand powder, and color silica Joint, anti-sticking sheet, characterized in that the combination of one or two or more selected from the group consisting of powder, PP woven fabric. The anti-sticking film prepared by the manufacturing method of claim 3 or 4 is provided with a joint film anti-sticking treatment sheet provided with the release film. To prepare an anti-tack treatment sheet including an extrusion process, a calender process, a cooling process and a winding process, A method for manufacturing an anti-sticking sheet comprising the step of fusion bonding the anti-stick film formed by the method of claim 3 or 4 together with the release film to the sheet body in the calendar process. Lay the edges of the adhesive sheet on top of each other, and adhere to each other to develop the joint part anti-tack sheet, The adhesive sheet construction method of overlapping the upper anti-sticking film and the lower anti-sticking film of the pressure-sensitive adhesive sheet of claim 6 or 7 and applying the hot air to the overlapping portions to fuse the anti-sticking film and the sheet body integrally. Construct a joint anti-adhesion sheet that overlaps the edges of the adhesive sheet and adheres to each other to continuously develop. After removing the release film on the anti-sticking film of the adhesive sheet of claim 8, the joints are formed by overlapping the edges on which the anti-sticking film is formed and applying hot air to the overlapped portions to integrally fusion the anti-sticking film and the sheet body. Anti-tack treatment construction method.

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