JPH09235525A - Film roll for coating film protection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film roll of a protecting film capable of clearly attaching without trapping balls or generating creases. SOLUTION: A tacky agent layer 3 is formed on the rear surface of an embossed film 1 having a lattice-like projection part 2 on the surface. The embossed film 1 is rolled around the outside of a core 4 in a state in which the tacky agent layer 3 is kept on the inside and nip pressure is applied to the embossed film 1 in rolling and the projection part 2 is pressed to the tacky agent layer 3 of the embossed film 1 to form a lattice-like groove 6 in the tacky agent layer 3. The embossed film 1 is drawn from the film roll and the embossed film 1 is bonded to a coating film surface and squeegee pressed onto the film surface is moved along the surface of the embossed film and air between the embossed film 1 and coating film surface is discharged along the groove formed in the tacky agent layer 3 to bond the protecting film on whole the coating film surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film roll composed of a protective film for protecting a coating film on an automobile, a method for producing the film roll and a method for protecting a coating film using the film roll.

[0002]

2. Description of the Related Art In recent years, at the stage of physical distribution when a new car is delivered to a user from a car production plant, a protective film is applied to the surface of the paint film in order to prevent the paint film of the car from being damaged. Protecting the membrane is done.

The protective film has a pressure-sensitive adhesive layer on one side for sticking the protective film. Since the coating surface of an automobile has a curved surface, it is extremely difficult to mechanically apply the protective film, and manual application is employed.

[0004]

By the way, in the conventionally known protective film, since the pressure-sensitive adhesive layer provided on one surface of the film has a uniform thickness over the entire surface, when the protective film is attached, There is a problem that it often takes time to attach the film because it contains air bubbles between the film surface and wrinkles on the film in many cases.

A first object of the present invention is to provide a film roll of a protective film which can be easily applied without containing air bubbles between the coating surface and wrinkles. is there.

A second object of the present invention is to provide a film roll manufacturing method which solves the first object.

Further, a third object of the present invention is to provide a protection method for protecting an automobile coating film using a film roll which solves the first object.

[0008]

In order to solve the above first problem, the first invention has removability on the entire back surface of an embossed film having lattice-like protrusions formed on the entire surface. Form an adhesive layer, with this adhesive layer inside,
A configuration is adopted in which the embossed film is wound around the core in a state in which the nip pressure for molding the protruding portion on the adhesive layer is applied to the embossed film.

In order to solve the second problem, the second
In the invention of, the embossed film is pulled out from the roll body of the embossed film on which the lattice-shaped protrusions are formed on the entire surface, and after the adhesive layer having removability is applied to the entire back surface of the embossed film, Adopting a constitution in which the pressure-sensitive adhesive layer is opposed to the outer circumference of the core rotated in one direction, and the embossed film is wound around the core in a state where a nip pressure is applied to the embossed film by a nip roll pressed against the core. There is.

Further, in order to solve the third problem, in the third invention, an embossed film is pulled out from the film roll according to the first invention, and the tip of the embossed film is adhered to the coating surface of the automobile. By applying pressure from the surface of the embossing film, the air between the embossing film and the coating surface is discharged along the groove formed in the adhesive layer, and the embossing film is sequentially adhered to the coating surface from the tip. It is adopted.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the embossed film 1
Has a lattice-shaped protrusion 2 on the surface thereof, and a pressure-sensitive adhesive layer 3 having a uniform thickness and having removability on the back surface. The embossed film 1 is wound around the core 4 with the adhesive layer 3 inside. During the winding, a nip pressure is applied to the embossed film 1 to such an extent that the pressure-sensitive adhesive layer 3 is molded by the protruding portion 2.

The embossed film 1 is made of a polyolefin film. Specifically, polyethylene, polypropylene and polybutene are added with an antioxidant, an ultraviolet absorber, a lubricant and a plasticizer for the purpose of improving the weather resistance, heat resistance, processability and workability of the film. .
Here, the ultraviolet absorber may be colored on one side of the film by means of printing or the like.

The film thickness of the embossed film 1 before embossing is set to about 10 μm to 300 μm. If it is less than 10 μm, it is difficult to form the protrusion 2 by embossing, and if it exceeds 300 μm,
It is disadvantageous in terms of cost, and the workability at the time of sticking the film on the surface of the coating film is also reduced.

As shown in FIG. 2, the height H of the protrusion 2 formed by embossing is set to about 10 μm to 50 μm. When the thickness is less than 10 μm, the amount of biting of the protrusion 2 into the pressure-sensitive adhesive layer 3 when the embossed film 1 is wound by applying a nip pressure is small, and it is difficult to form a groove capable of smoothly discharging air. is there. Also, 5
If it exceeds 0 μm, the film is torn during embossing of the film, and an embossed film cannot be obtained.

The adhesive force of the pressure-sensitive adhesive layer 2 provided on the back surface of the embossed film 1 is preferably 50 to 1000 g / 25 mm, and particularly preferably 200 to 500 g / 25 mm. That is, it is preferable that the adhesive has an adhesive force that can be easily peeled at the time of peeling and does not peel in the natural state. Examples of such an adhesive include polyisobutylene, butyl rubber, natural rubber, and acrylic resin. These may be used alone or as a main component.

The thickness of the pressure-sensitive adhesive layer 3 is equal to or thicker than the height of the protruding portion 2 formed on the embossed film 1, and is preferably 0.01 to 0.10 mm, particularly 0.01
5 to 0.06 mm is preferable.

To apply the nip pressure during film winding, the nip roll 5 is pressed against the core 4, and the embossed film 1 is pressed toward the core 4 by the nip roll 5.

The nip pressure of the nip roll 5 is 50 to 30.
It is assumed to be 0 kg / width. If the nip pressure is weak, the protrusion 2 cannot be molded on the adhesive layer, and if it is too strong, the protrusion 2 is deformed.

FIG. 7 shows an apparatus for forming the film roll A having the above structure. A reverse coater 10 is provided in the transfer path of the embossed film 1 wound in a roll shape, and the reverse coater 10 applies an adhesive to the back surface of the embossed film 1.

Here, the reverse coater 10 includes the coating roll 1 in the adhesive liquid filled in the glue tank 11.
Part of No. 2 is dipped, and the pressure-sensitive adhesive that adheres to the outer circumference by the rotation of the coating roll 12 is contacted with the metal roll 13 to make the film thickness uniform, and the pressure-sensitive adhesive having the uniform thickness on the outer circumference of the coating roll 12 is embossed. Film 1
Has been applied.

A drying zone 14 and a cooling zone 15 are provided in this order on the downstream side of the reverse coater 10. When the embossed film 1 runs in the drying zone 14, the pressure-sensitive adhesive layer 3 provided on the back surface of the embossed film 1. Is dried. When the embossed film 1 runs in the cooling zone 15, the pressure-sensitive adhesive layer 3 is cooled.

The embossed film 1 with the adhesive layer 3 cooled is inserted into the contact portion between the nip roll 5 and the core 4,
The rotation of the core 4 causes the embossed film 1 on the core 4.
Is wound up.

At this time, the embossed film 1 is wound on the core 4 so that the adhesive layer 3 faces the core 4. The nip pressure of the nip roll 5 is 50 to 300 kg / full width as described above.

The embossed film 1 is wound up with a proper tension being applied to the embossed film 1. A suitable tension is 5 to 10 kg / width. If it is less than 5 kg / full width, the embossed film 1 cannot be wound well, and if it exceeds 10 kg / full width, the film 1 is stretched, which is not suitable.

As described above, by winding the embossed film 1 in the state where the nip pressure is applied, the protruding portion 2 of the embossed film 1 has the adhesive layer 3 wound on the outer side thereof.
As shown in FIG. 3, the pressure-sensitive adhesive layer 3 is dented at a portion facing the protrusion 2 as it is embossed.

Therefore, by pulling out the embossed film 1 from the film roll A, the pressure-sensitive adhesive layer 3 having a depression on the surface can be obtained.

Since the protrusions 2 formed on the embossed film 1 have a lattice shape, the adhesive layer 3 has lattice-shaped grooves 6 as shown in FIGS. 4 and 5. Become.

When protecting the coating film of an automobile, the tip of the embossed film 1 pulled out from the film roll A is pressed against the coating surface of the automobile A to adhere the squeegee to the surface of the embossed film 1. The embossed film 1 is adhered in order from the tip by sliding along the surface.

During the bonding of the embossed film 1 as described above, the air between the coating surface and the embossed film 1 is formed by the adhesive layer 3
It will be discharged along the groove 6 formed in the. Therefore, the embossed film 1 can be satisfactorily attached without containing air bubbles and without generating wrinkles.

For the attachment of the embossed film 1 as described above, the embossed film 1 may be attached while pulling it out from the film roll, and the embossed film 1 may be cut at the stage where it is attached to the entire coated surface. Alternatively, the embossed film 1 may be preliminarily cut according to the size of the coated surface, and one end of the cut embossed film 1 may be sequentially attached to the coated surface.

[0032]

As described above, according to the present invention, the embossed film having the pressure-sensitive adhesive layer formed on the back surface is wound around the core with the pressure-sensitive adhesive layer inside and the nip pressure is applied during the winding. Therefore, the protrusion formed on the embossed film is embossed on the pressure-sensitive adhesive layer, and a protective film having a lattice-shaped groove formed on the pressure-sensitive adhesive layer can be obtained.

Therefore, when protecting the coating film of the automobile by applying the embossed film, the embossed film can be applied neatly without containing air bubbles and without generating wrinkles.

Further, since the grid-like grooves are formed in the pressure-sensitive adhesive layer by winding the embossed film, a release paper is not required and a low cost film roll can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view of a film roll according to the present invention.

FIG. 2 is a cross-sectional view showing the process of winding the embossed film of the same.

FIG. 3 is a cross-sectional view showing a wound state of the above embossed film.

FIG. 4 is a sectional view of an embossed film pulled out from a film roll.

FIG. 5 is a perspective view of FIG. 4;

FIG. 6 is a front view of a state in which an embossed film is attached to a coating film surface of an automobile.

FIG. 7 is a schematic view showing a film roll forming apparatus of the above.

[Explanation of symbols]

 1 Embossed Film 2 Projection 3 Adhesive Layer 4 Core 5 Nip Roll

Claims (3)

[Claims] 1. A pressure-sensitive adhesive layer having removability is formed on the entire back surface of an embossed film having lattice-shaped protrusions formed on the entire surface, and the pressure-sensitive adhesive layer is placed inside, and the pressure-sensitive adhesive layer has the above-mentioned structure. A coating film protection film roll in which the embossed film is wound around the core in a state where the nip pressure at which the protrusion is molded is applied to the embossed film. 2. The embossed film is pulled out from a roll body of an embossed film having lattice-shaped protrusions formed on the entire surface, and a pressure-sensitive adhesive layer having removability is applied to the entire back surface of the embossed film. A coating film protective film roll facing the outer circumference of the core rotated in one direction with the pressure-sensitive adhesive layer, and winding the embossed film around the core while applying a nip pressure to the embossed film by the nip roll pressed against the core. Manufacturing method. 3. The embossed film is pulled out from the film roll according to claim 1, the tip of the embossed film is adhered to the coating surface of the automobile, and the space between the embossing film and the coating surface is applied by pressing from the surface of the embossing film. A method for protecting a coating film, in which air is discharged along a groove formed in an adhesive layer and an embossed film is sequentially adhered to the surface of the coating film from the tip.