JPH0649957A - Metallic roof member and manufacturing method thereof - Google Patents

Abstract

PURPOSE:To protect the surface of roof members and, to protect it with a sheet with adhesion and stripping efficiency. CONSTITUTION:A metallic roof member 1 is so constituted that a protection sheet 5 of a substrate 5a provided with an adhesion layer 5b holding adhesive force of 80-200gf/25mm is stretched to a region from a doglegged bent surface of the front end face section 2 to a face insertion recess section 4a of the rear end halfpace section 4 in the roof member consisting of the front end face section 2, a court-yard section 3 and the rear end halfpace section 4. As a result, the surface of the roof member is protected and, at the same time, appropriate adhesion is displayed in the case of execution, and it can be easily stripped off after it is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal roofing material such as steel plate and aluminum and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a metal roofing material is composed of a fitting portion at the tip, a courtyard portion in the middle, and a folding portion at the rear end, and the fitting portion at the leading end and the folding portion are superposed one on top of another. The roofing is done, but the surface of the metal roofing material is bare except for plating.

However, in this state, (a) when the outer wall mortar material or paint is sprayed after the roofing, the mortar and paint adhere to the roof material and once fixed, they are fixed and easily peeled off. Hard to do. (B) Since paints of different colors adhere, it is often necessary to repaint with paints of the same color. (C) When a roofer or plasterer walks on the roofing material during construction, it will be damaged by mud and sand, and shoe marks will remain, resulting in a dirty finish and not suitable for a new building. was there.

Attempts have also been made to partially apply a pressure-sensitive adhesive to a synthetic resin film to prepare a protective sheet, and to attach the protective sheet to the entire surface of the roofing material, but to cover the entire surface with the sheet. If this happens, the sheet will also bite in the overlapping part of the fitting part and the folded part, and in order to peel it off, it has a fatal drawback of putting a knife and scratching the roof material surface instead. .
Also, when the pressure-sensitive adhesive is heated in hot summer in the midsummer, the temperature of the material rises and it becomes difficult to peel off after the adhesive state, and in the middle of winter the pressure-sensitive adhesive becomes brittle and has a high modulus. Many lacked

[0005]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances, and will develop a method of protecting the surface of a roofing material and protecting it with a sheet having both adhesiveness and peeling property. It is what

[0006]

The roofing material of the present invention is a roofing material comprising a tip fitting portion, a courtyard portion and a folding portion at the rear end. A protective sheet of a synthetic resin film having an adhesive layer interposed is attached to the area of the courtyard portion reaching the part insertion concave portion, and preferably 80
It is characterized in that a protective sheet of a synthetic resin film having an adhesive layer holding an adhesive force of up to 200 gf / 25 mm is interposed.

[0007]

[Function] Since the protective sheet is attached to the area of the courtyard from the bent surface of the roof part of the roof part to the concave part insertion part of the rear end folded part, the exposed surface is protected, Even if a roofer or a plasterer steps on or paint splatters from the spray of the outer wall, the surface is protected, and if this is peeled off after the completion of construction, a beautiful finished surface can be obtained. Also, the adhesive layer is 80-
Adhesion of 200 gf / 25 mm does not cause a sudden increase or decrease in adhesive strength even when exposed to direct sunlight in midsummer, does not have a high modulus even in the severe winter season, and provides adhesion to wind and rain. In addition to having it, when peeling after use, it can be peeled without leaving an adhesive on the roofing material side, and a well-balanced adhesive structure is maintained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment will be described below. In FIG. 1, reference numeral 1 is a roofing material, which has a fitting portion 2 bent in a V shape at its tip and the fitting portion 2 at the rear end. Insertion recess 4a
And a U-shaped support portion 4 which is connected to this and supports the attachment portion.
A folded-back portion 4 composed of b and b is formed, and a relatively flat courtyard portion 3 is provided therebetween. The material is, for example, a hot-dip galvanized steel sheet having a thickness of 0.4 mm and a width of about 60 mm.
235 mm in length is used. However, the shape and material of the roof material are merely general examples, and other shapes and materials are also included. Using a joint in the lateral direction of the roof material 1, the roof material 1 is fitted into the folded plate material having a cross section of Ω type from the left and right to be connected to each other.

Then, in a region extending from the vertical wall of the above-mentioned attachment 2 through the middle courtyard 3 to the insertion recess 4a of the rear-end folded-back portion 4, an adhesive layer 5b, which will be described later, and a soft transparent or translucent composite. Protective sheet 5 in which resin film base material 5a is laminated
Attach. In this region, the tip of the fitting portion 2 and the tip of the concave portion 4a into which the fitting portion 2 is inserted are not overlapped, so that the protective sheet 5 can be used even when the roof is being roofed.
Is a region that can be easily peeled while protecting the surface without being sandwiched. The base material 5a of the synthetic resin film is preferably a resin having a thickness of, for example, 60 μm and excellent weather resistance for surface protection, and examples thereof include vinyl chloride, polyethylene and polypropylene.
Further, for peeling after use, the adhesive force between the roofing material 1 and the adhesive layer 5b must exceed the adhesive force between the base material 5a and the adhesive layer 5b. Is preferably roughened to increase the adhesive force between the base material 5a and the adhesive layer 5b.

Next, the pressure-sensitive adhesive layer 5b must be set to have characteristics so as to withstand the conditions of use as a roofing material. The material is a pressure-sensitive adhesive resin film or a pressure-sensitive adhesive. In the case of a pressure-sensitive adhesive resin film, for example, PET pressure-sensitive adhesive is used. A resin film is used, and in the case of a pressure-sensitive adhesive, for example, acrylic acid ester is used, and the pressure-sensitive adhesive force is set to 80 to 200 gf / 25 mm. That is, when the temperature rises in the hot summer of midsummer, it has a property of excellent heat resistance that does not significantly increase or decrease the adhesive strength, and
At low temperatures in severe winter, high modulus does not occur even below freezing,
It is necessary to maintain the low temperature characteristics, and for that purpose, the above PET adhesive resin film or acrylic ester is suitable (see FIG. 2). Also, the attached protective sheet 5
Has an adhesive strength that does not peel off due to the difference between wind and rain, and when peeling after use, it must be peeled off relatively easily without leaving an adhesive on the roofing material 1 side,
It is important to set the characteristics of the adhesive layer 5b by balancing the properties of each other, and for that purpose, the adhesive strength is set to 80 to 20.
A value of 0 gf / 25 mm is suitable. Adhesion is 80
If it is less than gf / 25 mm, the adhesiveness is poor and peeling occurs due to weather and rain, and if it is more than 200 gf / 25 mm, abnormal adhesion tends to occur at high or low temperatures.

The method of manufacturing the roofing material will be described. First, a transparent vinyl chloride resin having a thickness of 60 μm is used as the base material 5a, and a PET adhesive resin is laminated on the base material 5a by a coextrusion method. Or the acrylic ester is applied. The adhesive layer 5b may be laminated on the entire surface of the sheet, or may be in an oblique line shape or a lattice shape.

Then, a hot-dip galvanized steel sheet having a width of 60 mm and a thickness of 0.4 mm forming the roofing material is rolled and rolled.
Hang on the delivery roll 6. On the other hand, the protective sheet 5 is hooked on the delivery roll 7, and each of them is hooked on the pressure rolls 8a, 8b as shown in FIG. A guide frame 8c for determining the positions of the roof material 1 and the protective sheet 5 is arranged in front of the crimping rolls 8a and 8b, and the roof material 1 and the protective sheet 5 are attached in accordance with the guide frame 8c. Induce and roll up 8
It is clamped by being sandwiched between a and the lower roll 8b. As a result,
The protective sheets 5 of the roofing material 1 can be accurately brought into close contact with each other at the positions to be attached.

Next, the plate-shaped roofing material 1 to which the protective sheet 5 has been attached is cut into a predetermined length in the longitudinal direction of the roofing material 1 with a cutting machine, for example, a length of 1350 mm. .
Next, in order to form the fitting portion 2, the courtyard portion 3 and the folding portion 4, a bending line in which bending rollers are continuously provided is assembled, and the roofing material 1 is passed through the bending line to assemble the folding line. 2, the courtyard 3 and the folded-back portion 4 at the rear end are sequentially formed to obtain a predetermined product, and then several sheets are stacked and bundled so as to be suitable for transportation.

The operation of the roofing material of the present invention will be described. In order to make a roofing using the roofing material of the present invention, the tip is placed in the inverted U-shaped concave portion 4a of the folded-back portion 4 at the rear end in the usual manner. Attach the U-shaped Mitsuke 2 to make a stack and stack it up from the bottom to the top. Then, the surface of the roofing material 1 is exposed except for the top end fitting portion 2 and the rear end folding portion 4 of the superposition, and the protective sheet 5 is attached to the exposed portion, so that the roofing is performed. Even if a craftsman or a painter of wall material is stepping on, the roof material is not directly polluted. Further, even if paint or mortar for spraying the wall material is blown off, it only adheres to the surface of the protective sheet 5 and the roof material 1
It will not stick to the surface and will give a beautiful finish.

During this construction period, around the midsummer,
The temperature of the metal roofing material rises due to direct sunlight,
It weakens the adhesive strength, or, on the contrary, causes an abnormal increase in the adhesive strength, and conversely, during the severe winter, there are days when the temperature is below zero and the adhesive solidifies and the modulus increases. May be abnormally high. At this time, the adhesive layer 5
Since the adhesive force of b is 80 to 200 gf / 25 mm,
It retains a strong adhesive force against heat and, in particular, does not cause an abnormal increase in the adhesive force due to the high temperature caused by a conventional adhesive, and does not cause inconvenience such as difficulty in peeling afterwards. Further, it does not become brittle even at low temperatures, and the problem of high modulus can be solved by returning to normal temperature in the daytime. In addition, it has an appropriate adhesion strength to withstand wind and rain, etc., and when peeling after use, it can be peeled without leaving adhesive on the roofing material side, maintaining a well-balanced adhesive structure.

Even in the manufacturing method, the protective sheet 5 is attached to the plate-shaped roof material 1 by using the pressure-bonding rolls 8a and 8b before forming the parts such as the fitting portion 2 of the roof material 1. Since the protective sheet 5 is attached at a predetermined position, the attaching position of the protective sheet 5 to the roof material 1 is accurate, and when the roofing work is performed later, the protective sheet will bite into the overlapping portion, or conversely, the courtyard. There is no problem such as a portion where the protective sheet 5 is not attached to the portion 3.

Further, after the protective sheet 5 is attached, the fitting portion 2 and the like are bent, so that the protective sheet 5 protects the surface of the roof material 1 from the risk of damage due to friction during the manufacturing process. And improve product quality. Naturally, the same effect is exhibited when transporting several sheets in a pile.

[0018]

The present invention is as described above, and no matter how bad the roofing work is done, if the protective sheet is peeled off at the end, the surface of the beautiful metal roofing material is exposed and the new construction is completed. A beautiful finish can be achieved even during work or repair work.
At that time, since the attachment of the protective sheet can be processed at the factory,
At the construction site, it is only necessary to perform the peeling work after the construction is completed, and the conventional repainting and wiping can be omitted.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a roofing material of the present invention.

FIG. 2 is a partially enlarged vertical side view of the protective sheet of the present invention.

FIG. 3 is a schematic vertical cross-sectional view showing a pressure bonding step between a roofing material and a protective sheet.

FIG. 4 is a flowchart showing a series of steps of the manufacturing method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roofing material 2 Fitting part 3 Courtyard part 4 Folding part 5 Protective sheet 5a Base material 5b Adhesive layer 6 Delivery roll 7 Delivery roll 8a, 8b Crimping roll

Claims (3)

[Claims] 1. A roofing material comprising a tip end fitting portion, a courtyard portion, and a rear end folding portion, in a region of the courtyard portion extending from the V-shaped bent surface of the tip end fitting portion to the fitting portion insertion concave portion of the rear end folding portion. ,
A metal roofing material, characterized in that a protective sheet is attached to a synthetic resin base material with an adhesive layer interposed. 2. A roofing material comprising a tip end fitting portion, a courtyard portion and a rear end folding portion, in a region of the courtyard portion extending from the V-shaped bent surface of the tip end fitting portion to the fitting portion insertion concave portion of the rear end folding portion. ,
A roof material made of metal, to which a protective sheet of a synthetic resin film having an adhesive layer holding an adhesive force of 80 to 200 gf / 25 mm is attached. 3. A synthetic resin film (a) having an adhesive strength of 8
Forming a protective sheet by laminating an adhesive resin film or an adhesive adjusted to 0 to 200 gf / 25 mm,
(B) On the other hand, the plate-shaped roofing material is rolled and hung on the delivery roll, and the roofing material and the protective sheet are protected by a crimping roll equipped with a guide frame. The sheet is attached to the area of the inner courtyard from the curved surface of the roof-end fitting part of the roof material to the recess of the rear-end folding part where the fitting part is inserted, and (c) this is connected to the bending roll. A roofing material is obtained by passing through the bent line.