JP2001262083A - Masking tape for molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a masking tape having the function of giving a clearance between a molding and the surface to be coated when it is inserted therebetween, which tape can easily cope with the curved or bent part of the molding. SOLUTION: This tape consists of a base 12 comprising a belt-like flexible sheet; an insert 16 disposed beltwise along the side edge of one of the surfaces of the base 12 and made of a rigid plate material; a pressure-sensitive adhesive layer 14; and cuts 17 arranged at intervals in the direction of the length of the insert 16, each transversing the insert 16 in the direction of width, and each penetrating the insert 16 and the base 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masking tape for a molding material, and is used when repainting is performed after manufacturing an automobile, for example, by covering an unpainted area at a molding material supporting a window glass. It is intended for masking tape.

[0002]

2. Description of the Related Art In the case of painting an automobile, if the vehicle body is painted before the window glass or the molding material is attached, and then the window glass and the molding material are attached, the paint adheres to the window glass or the molding material. In addition, it is possible to paint even the portion hidden under the molding material, and a good finish can be obtained. However, if you want to change the paint color of the completed car, perform repair painting after repair, or repaint it because it has faded over time, make sure that the window glass or molding material is attached. It is necessary to perform painting work on the car body.

[0003] In this case, the coating is performed while the surfaces of the window glass and the molding material are masked. Then, a boundary line of a new paint appears at a boundary portion between the side edge of the molding material and the vehicle body surface, which causes a problem that appearance is deteriorated. As a means to solve this problem, a method has been proposed in which, with the flange part covering the vehicle body surface of the molding material lifted, painting is performed to the depth of the flange part of the molding material, and the flange part is restored after painting Have been. In this case, the boundary of the paint does not appear near the side edge of the molding material, so that the finish of the paint is very good.

A masking tape suitable for such a coating method is disclosed in Utility Model Registration No. 3026624. In this masking tape, a band-shaped stiffening strip made of a hard resin such as polystyrene is arranged along the side of the adhesive tape. This stiffening strip is inserted between the molding material and the vehicle body surface, the adhesive tape connected to the stiffening strip is folded back from the end of the molding material, and the covering is applied from the molding material to the outside of the vehicle body surface. . Since a part of the molding material is fixed in a form lifted by the stiffening strips, the paint adheres to the vehicle body surface below the molding material and the painting is performed. Since the molding material is covered with the stiffening strip and the adhesive tape, the paint does not adhere.

The masking tape having the above structure is commercially available as a trim tape (trade name: manufactured by 3M) or a lifting tape.

[0006]

The above-described masking tape with a stiffening strip is not so problematic when it is used at a straight portion of a molding material, but at a curved or bent portion such as a corner of a molding material. However, there is a problem that it is very difficult to use. It is difficult to insert a stiffening strip having a straight band shape along the masking tape while curving it in a curved shape along the lower surface of the molding material having a curved shape. It is practically impossible to insert a stiffening strip having high rigidity that can hold the molding material in a curved state according to the curved shape of the molding material.

Therefore, conventionally, a masking tape is cut into a short width, the cut tape pieces are sequentially arranged along a curved portion of the molding material, and a stiffening strip of each tape piece is inserted into the lower surface of the molding material. Like that. However, according to this method, it takes time and effort to cut the masking tape into small tape pieces or to insert the cut tape pieces one by one into the lower surface of the molding material, resulting in reduced work efficiency. Moreover, if there is a gap between adjacent tape pieces, there is a concern that the paint may adhere to the molding material. Inserting the tape pieces into the lower surface of the molding material so that the tape pieces surely overlap with each other without any gaps requires a great deal of skill.

For example, in the case of a window glass of a passenger car or the like in an automobile, a portion formed by a perfect straight line in the outline is rather small, and a gentle curve is often drawn even if it is not a corner portion. . For this reason, it is extremely troublesome to perform the above-described cutting operation of the small tape pieces and the individual insertion work at all the curved portions, and the operation time and the operation cost are increased. An object of the present invention is to provide a masking tape having a function of inserting a gap between a molding material and a painted surface by being inserted between the molding material and a painted surface, and easily forming a curved portion or a bent portion of the molding material. To be able to respond.

[0009]

A masking tape for molding material according to the present invention is a masking tape for covering a non-painting area including a surface of a molding material on a construction surface on which the molding material is disposed at the time of painting. A base material made of a strip-shaped flexible sheet, and arranged in a band shape along one side of the surface of the base material, an insertion portion made of a hard plate material, and a surface of the base material Among them, the adhesive layer and the adhesive layer arranged in a band along the side opposite to the side, arranged at intervals in the length direction of the insertion portion, traverses the insertion portion in the width direction, And a score line penetrating from the insertion portion to the base material.

[Substrate] The same material as the substrate in the usual masking tape for coating can be used. A molding material or a flexible sheet material that can be deformed along the painted surface is preferable. Specifically, paper, a nonwoven fabric, a synthetic resin, a metal foil, or the like may be used alone or laminated. If the material is excellent in elasticity, it is easy to adhere to the molding material or the painted surface in close contact. The thickness and width of the band-shaped base material can be appropriately set according to use conditions and required performance,
Usually, the thickness is 0.1-0.25mm and the width is 35-70mm
Is set in the range.

[Insertion Portion] The same material as the insertion portion in the masking tape for ordinary molding material can be used. Hard plate material with strength or rigidity that can be inserted between the molding material and the painted surface to temporarily deform the molding material so that there is a certain gap between the molding material and the painted surface Is used. As the material of the insertion portion, cardboard, synthetic resin, metal, ceramic, or the like can be used. As synthetic resins, PET, polyester, polystyrene,
Polypropylene, polycarbonate, polyvinyl chloride,
Examples include polyethylene.

The thickness of the insertion portion varies depending on the material used and the required performance, but can usually be set in the range of 0.1 to 0.3 mm. In order to correspond to the curved portion of the molding material with the conventional molding material masking tape, it was necessary to make the insertion portion relatively thin to facilitate deformation, but in the case of the present invention, Since the insertion portion itself does not need to be deformed much, it may be relatively thick and have high rigidity. By increasing the rigidity, the straightening function of temporarily deforming the molding material can be favorably performed.
The insertion portion is arranged in a band along one side of the surface of the base material. The width of the insertion portion is set according to the depth dimension of the flange portion of the molding material into which the insertion portion is inserted.
Usually, the width of the insertion portion can be set in the range of 5 to 20 mm.

[0013] The insertion portion is fixed to the surface of the base material by various fastening means such as adhesion, heat fusion, and stitching. It can also be pasted using an adhesive layer described later. [Adhesive layer] The adhesive layer has a function of adhering a portion of the surface of the base material where the insertion portion is not disposed to a molding material or a construction surface.
On the surface of the base material, it is arranged in a band along the side opposite to the insertion portion. An adhesive layer may be disposed on the entire surface of the base material surface except for the position where the insertion portion is disposed, or a portion having no adhesive layer may be provided in a part. For example, it is possible to provide an adhesive layer only near the side of the base material and not to provide the adhesive layer at the center in the width direction of the base material.

As the material of the pressure-sensitive adhesive layer, various pressure-sensitive adhesives for forming a pressure-sensitive adhesive surface in a normal masking tape can be used. A material having sufficient adhesive strength, good releasability, and less likely to adversely affect the construction surface is preferable. On the surface of the base material, an adhesive layer is provided at a place where the insertion portion is arranged, and the insertion portion can be fixed to the base material by using the adhesive layer. If a release sheet made of paper or synthetic resin is placed on the surface of the adhesive layer exposed and exposed on the surface of the base material, the adhesive layer will become It is possible to prevent foreign substances from adhering and prevent the masking tape from sticking to other objects.

[Scission Line] The strip-shaped insertion portion is divided in the length direction to form a large number of divided pieces. With the arrangement structure of the score line,
The shape and dimensions of the divided pieces are determined. The interval, that is, the pitch of the cut lines in the length direction of the insertion portion determines the width of the divided piece.
The smaller the width of the divided piece, the easier it is to correspond to the curved portion of the molding material, but the wider the width of the divided piece, the higher the rigidity and deformation resistance. Usually, the width of the divided pieces, that is, the interval between the cut lines,
It can be set in the range of 10 to 30 mm. The intervals between the cut lines may all be the same, or portions having different intervals may exist.

The shape of the cut line determines the shape of both sides of the divided piece. The cut line may be a straight line that crosses the insertion portion at a right angle, or may be an inclined line. It may be a curve or an uneven line. If the cut line has a convex shape that protrudes in the length direction in the middle with respect to both ends in the width direction of the insertion portion, adjacent divided pieces are formed in order to correspond to the curved portion of the molding material. It is easy to perform the operation of partially overlapping and arranging. As the cut line having the convex shape, a cut line that is bent in a substantially “C” shape or an arc shape can be adopted. Furthermore, if the whole is curved in a substantially S-shape, the divided pieces can be overlapped with each other by a smooth operation.

[Use of masking tape for molding material] A molding material is also called a trim material, a gasket material, or a molding, and is attached to a place where a plurality of members are arranged adjacently, such as a window glass and a window frame portion. Thus, it is a member that covers the boundary between adjacent members and integrates them.
When coating the place where such a molding material is installed, a masking tape for the molding material is used. As a concrete construction surface, there is a place where a molding material is installed between the outer periphery of the window glass of the automobile and the vehicle body. In addition to automobiles, it can be applied to vehicle bodies and windows of various buildings. Further, the present invention is also applied to a connection point of a plurality of frame portions constituting a vehicle body of an automobile, a connection point of a plurality of plate members constituting an architectural surface, and the like.

The molding material is made of rubber, soft synthetic resin, or the like, and has a flange portion that covers a part of the surface with respect to the members on both sides of the construction surface. The molding material masking tape has a function of temporarily deforming a flange portion of the molding material. In addition, it functions to cover the uncoated area including the deformed flange portion from the back surface to the surface of the molding material, and further to the construction surface outside the molding material so that the paint does not adhere during painting. In order to attach the molding material masking tape to the construction surface, basically the same operation as that of a normal molding material masking tape is performed. Specifically, after inserting the insertion portion arranged on one side of the base material between the flange portion of the molding material and the member constituting the painting work surface, the flange portion contacts the flange portion. Deformed away from the painted surface. The masking tape is adhered to the area where the adhesion of the paint must be prevented, that is, the non-painted area, including the surface of the molding material or the construction surface outside the molding material, by using the adhesive layer.

At the place where the molding material extends linearly,
It can be used in the same manner as a normal masking tape for molding materials. The insertion part is divided into a number of divided pieces by the cut line, but the many divided pieces are integrated, inserted between the flange part of the molding material and the painting work surface, or the flange part is temporarily deformed. Or you can. Even at the place where the molding material is curved or bent, each divided piece that constitutes the insertion part is formed along the curvature or bending of the molding material without cutting the molding material masking tape into small pieces. Between the flange and the surface to be painted. Adjacent divided pieces are inserted in a partially overlapped state, and the function of deforming the flange portion and the function of covering the back surface of the flange portion are well exhibited.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Structure of masking tape for molding material] Masking tape 10 for molding material shown in FIGS.
Are the base material 12, the adhesive layer 14, the insertion portion 16, and the release sheet 1.
8 is provided. The base material 12 is made of a crepe paper material having excellent flexibility and deformable flexibly, and has a long belt shape. An adhesive is applied to the entire surface of the substrate 12 to form an adhesive layer 14. On the surface of the adhesive layer 14, the substrate 12
Along the one side, a plug-in portion 16 made of a belt-shaped PET resin sheet is attached. In the insertion part 16,
It has a number of cut lines 17 spaced apart in the longitudinal direction. The score line 17 traverses the insertion portion 16 in the width direction, and the insertion portion 16
And the band-shaped insertion part 16 is divided into a number of small pieces 16a. As shown in FIG. 3, the score line 17 penetrates to the back side of the base material 12.

As shown in FIG. 1, the score line 17 is curved in a gentle S-shape, and the lower curved portion 17 of the S-shape is formed.
a has a convex shape protruding outward from a line connecting both ends of the cut line 17. Of the adhesive layer 14, the insertion portion 16
A release sheet 18 made of a paper material is releasably attached to a place where is not disposed. The masking tape 10 having the above structure can be transported and stored in a state wound in a reel shape. Since the insertion portion 16 made of a hard material is divided into small divided pieces 16a by the cut lines 17, the operation of winding the masking tape 10 is facilitated.

The masking tape 10 without the release sheet 18 can be handled in a wound state. In this case, if the back surface of the base material 12 (the surface opposite to the adhesive layer 14) is subjected to a peeling treatment for facilitating the peeling from the adhesive layer 14, the wound masking tape 10 may be peeled off in order and used. Can be. [Use of masking tape for molding material] FIGS. 4 and 5 show the use state of the masking tape 10 for molding material. As shown in FIG. 4, a window glass 22 is attached to a vehicle body 20 made of a steel plate or the like of an automobile via a rubber molding material 30. A part of the surface of the vehicle body 20 and a part of the surface of the window glass 22 are covered with a flange portion 32 projecting left and right of the molding material 30.

The car body 20 includes a molding material 30 and a window glass 2.
2 is applied to the entire surface before mounting. However, when repainting after repairing the vehicle body 20, when changing the paint color of the vehicle body 20, or changing the paint design, the molding material 30 is used. It is necessary to further paint the vehicle body 20 in a portion adjacent to the vehicle body. At the time of painting, a so-called masking process is performed to cover a non-painting area where paint is not adhered.
Of the molding material 30, the insertion portion 16 of the molding material masking tape 10 is inserted between the flange portion 32 covering the surface of the vehicle body 20 and the surface of the vehicle body 20. The base material 12 in the portion of the masking tape 10 excluding the insertion portion 16 is folded back from the front end of the flange portion 32 of the molding material 30 to the upper surface side, and an operation is performed so that the front end side of the flange portion 32 is lifted upward. .

From the masking tape 10 to the release sheet 18
Is removed from the surface of the molding material 30 to the surface of the window glass 22 outside the molding material 30 using the adhesive layer 14. At this time, the masking tape 10 is adhered to the surface of the molding material 30 and the window glass 22 in a state where the tension is applied in a direction in which the flange portion 32 of the molding material 30 is lifted. In the state of FIG. 4, if the surface of the vehicle body 20 is painted by spray painting or the like, the paint is applied to the underside of the vehicle body 2 below the flange portion 32 of the molding material 30.
The paint reaches even the surface of 0. On the lower side of the flange portion 32, the adhesion of the paint gradually decreases toward the back. At the time of painting, it is preferable that the masking process for the painting is also performed on the center side of the window glass 22 not covered with the masking tape 10 using a normal masking tape or a masking sheet.

After the coating is completed, the masking tape 10 is peeled off, and the insertion portion 16 is pulled out from below the flange portion 32 of the molding material 30. Then, the flange portion 32 is tightly covered with the surface of the vehicle body 20 again. . At this time, since the surface of the vehicle body 20 is coated to a position deeper than the front end position of the flange portion 32, there is no step or cut in the coating near the front end of the flange portion 32. The operation described here is the same as the method of using a general molding material masking tape. In the straight portion of the molding material 30, the same operation as that of a general molding material masking tape is performed.

[Masking of Curved Portion] FIG. 5 illustrates an operation at a curved portion or a bent portion of the molding material 30 generated at a corner portion of the window glass 22 or the like. Similarly, when inserting the insertion portion 16 below the flange portion 32 of the molding material 30, the insertion portion 16 is inserted according to the curved shape of the molding material 30, that is, the flange portion 32. Since the insertion portion 16 is divided into a large number of small divided pieces 16 a by the cut lines 17, the individual divided pieces 16 a are inserted straight from the front end of the flange portion 32 toward the back. The adjacent divided pieces 16a partially overlap each other.

At this time, the convex curved portion 17a of the S-shaped cut line 17 allows the projecting portion of one of the split pieces 16a to slide along the edge of the concave portion of the adjacent split piece 16a. By riding on top of each other, the overlapping of each other naturally occurs smoothly. Therefore, even if the individual divided pieces 16a are not operated one by one on the front and back sides, the insertion portion 16
If the whole is deformed so as to be slowly curved, the divided pieces 16a naturally partially overlap with each other, thereby forming a smooth curved shape as a whole. Of course, each divided piece 16a
It is also possible to perform the insertion operation while checking or correcting the overlap of the.

As a result of the above operation, a large number of divided pieces 1
6a can reliably cover the back surface side of the flange portion 32 even in the curved portion. Outside the insertion portion 16, the masking tape 10 is applied from the tip of the flange 32 to the molding material 3.
0 and the window glass 22. This operation is the same as described above. At this time, the flexible substrate 1
2 can be made to correspond to the curved shape of the molding material 30 by curving or partially folding the curved material 30 along the curved shape. In the straight portion of the molding material 30, since the divided pieces 16 a separated by the cut lines 17 are closely arranged, the back surface of the flange portion 32 is securely covered with the insertion portion 16 even in the straight portion. State. Even if the insertion portion 16 is divided into a plurality of divided pieces 16a, the deformation resistance and rigidity in the width direction of the insertion portion 16 are not significantly affected. About the action of lifting
This is comparable to a conventional insertion part without a score line.

[Modification of Cut Line] FIGS. 6A and 6B differ from the above embodiment in the shape of the cut line 17. In FIG. 6 (a),
A cut line 17 in the shape of a “<” is provided. In FIG. 6 (b),
An arcuate score line is provided. In each case, score line 1
7 has a protruding shape in which a portion on the way from both ends protrudes outward. By having such a convex shape, in the curved portion of the molding material 30, the adjacent divided pieces 16a can be smoothly overlapped with each other, as in the above-described embodiment. [U-shaped molding material] Masking tape 10 for molding material
Can also be applied to U-shaped molding materials used for mounting window glasses of automobiles.

As shown in FIG. 7, the U-shaped molding material 30
Is a flap-like flange portion 32 which is relatively thin and easily deformed.
However, it is attached so as to protrude from the side surface of the molding material 30. The flange portion 32 is attached in a state where the flange portion 32 is in contact with the side surface of the step portion of the vehicle body 20. As a result, a U-shaped groove is formed between the flange portion 32 and the main body of the molding material 30. This groove is used for drainage. When applying the coating to such a U-shaped molding material 30, the vehicle body 2
It is preferable that the inside surface of the step portion of 0 is also coated. Then, the insertion portion 16 of the molding material masking tape 10 is inserted between the flange portion 32 and the side surface of the step portion of the vehicle body 20, and the base material 12 is moved from the surface of the main body portion of the molding material 30 to the surface of the window glass 22. Paste to. Since the flange portion 32 is separated from the vehicle body 20, the paint adheres to the side surface of the step portion of the vehicle body 20 with a certain width. If you remove the masking tape 10 for molding material after painting,
The flange portion 32 comes into contact with the vehicle body 20, and the boundary of the painted portion becomes inconspicuous.

[0031]

According to the masking tape for molding material of the present invention, an insertion portion which is inserted between the molding material and the surface to be painted and temporarily deforms a part of the molding material is separated by a score line. By being divided into a large number of divided pieces, the insertion portion can be reliably and easily inserted between the molding material and the painting work surface even at a place where the molding material is curved or bent. Since the inserted insertion portion partially overlaps the divided pieces, the inserted portion can reliably cover the back surface of the molding material and also satisfactorily perform the function of temporarily deforming the molding material.

As a result, the workability of the painting work on the construction surface on which the molding material is installed can be improved, and the finish quality can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a masking tape according to an embodiment of the present invention.

FIG. 2 is a sectional view of a masking tape.

FIG. 3 is a back view of the masking tape.

FIG. 4 is a vertical sectional view in a used state.

FIG. 5 is a horizontal sectional view of a used state.

FIG. 6 is a plan view illustrating another embodiment of a score line.

FIG. 7 is a sectional view showing another state of use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Masking tape for molding materials 12 Base material 14 Adhesive layer 16 Insertion part 16a Split piece 17 Cut line 18 Release sheet 30 Molding material 32 Flange part

Claims (5)

[Claims] 1. A masking tape for covering a non-coating area including a surface of a molding material on a construction surface on which the molding material is disposed at the time of coating, wherein a base material comprising a strip-shaped flexible sheet is provided. An insertion portion made of a hard plate material, arranged in a band along one side of the surface of the base material, and along a side of the surface of the base material opposite to the insertion portion. An adhesive layer arranged in a band shape, a cutting line arranged at intervals in the length direction of the insertion portion, traversing the insertion portion in the width direction, and penetrating from the insertion portion to the base material. Masking tape for mall materials to be equipped. 2. The masking tape for a molding material according to claim 1, wherein the cut line has a convex shape in which a part of the cut line projects in the length direction from both ends in the width direction of the insertion portion. 3. The masking tape for a molding material according to claim 2, wherein the cut line is curved in a substantially S-shape. 4. An interval in the length direction of the cutting line is 10 to 3
The masking tape for a molding material according to any one of claims 1 to 3, which is 0 mm. 5. The masking tape for a molding material according to claim 1, wherein a release sheet is disposed on the surface of the adhesive layer.