Protective Film

Abstract

To provide a protective film capable of achieving further improvement in the performance of protection against environmental influences such as rain, snow, wind, mud, dust, and ultraviolet rays in moving objects (particularly vehicles), buildings (particularly houses and dwellings), and the like. [Solution] The film layer 10 includes an adhesive layer 20, the film layer having a first surface 10-1 and a second surface 10-2 opposite the first surface, an adhesive layer being provided on either the first surface or the second surface, the film layer having a polyethylene-based polymer, and the adhesive layer having an environmentally friendly acrylic-based water-based adhesive.

Description

[Technical field]

[0001] The present invention relates to a protective film. [Background technology]

[0002] Conventionally, there have been known techniques for protecting moving objects (particularly vehicles), buildings (particularly houses and residences), etc. from environmental influences such as rain, snow, wind, mud, dust, ultraviolet rays, etc., to prevent scratches or damage to the moving objects (particularly vehicles), buildings (particularly houses and residences), etc.

[0003] For example, US Pat. No. 5,399,633 discloses the use of an adhesive surface protection film for transported automobiles. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-166855 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology proposed in Patent Document 1 may not be able to further improve the protection performance of moving objects (particularly vehicles), buildings (particularly houses and dwellings), etc. against environmental influences such as rain, snow, wind, mud, dust, and ultraviolet rays.

[0006] Therefore, the present invention has been made in consideration of these circumstances, and its main objective is to provide a protective film that can further improve the protection performance of moving objects (especially vehicles), buildings (especially houses and residences), etc. against environmental influences such as rain, snow, wind, mud, dust, and ultraviolet rays. [Means for solving the problem]

[0007] In order to achieve the above-mentioned objective, the inventors conducted intensive research and, as a result, succeeded in developing a protective film that can further improve the protection performance against environmental influences such as rain, snow, wind, mud, dust, and ultraviolet rays in moving objects (especially vehicles), buildings (especially houses and dwellings), etc., and thus completed the present invention.

[0008] That is, in this invention, A film layer and a pressure-sensitive adhesive layer, the film layer has a first surface and a second surface opposite to the first surface; the pressure-sensitive adhesive layer is provided on one of the first surface and the second surface, the film layer comprises a polyethylene-based polymer; The pressure-sensitive adhesive layer has an environmentally friendly acrylic water-based pressure-sensitive adhesive.

[0009] In the protective film according to the present invention, The protective film may have a lateral tensile strength of 4N / 25mm to 12N / 25mm; The protective film may have a tensile strength in the longitudinal direction of 10 N / 25 mm to 20 N / 25 mm.

[0010] In the protective film according to the present invention, The adhesive strength of the protective film may be 2N / 25mm to 6N / 25mm. Effect of the Invention

[0011] The protective film according to the present invention can further improve the protection performance against environmental influences such as rain, snow, wind, mud, dust, and ultraviolet rays in moving objects (particularly vehicles), buildings (particularly houses and residences), etc.

[0012] Note that the effects described here are not necessarily limited to those described herein, and may be any of the effects described in this specification. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view showing a protective film according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view showing a protective film according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. Note that the embodiment described below is an example of a typical embodiment of the present invention, and does not limit the scope of the present invention, and various combinations, modifications, and changes are possible within the scope of the gist of the present invention.

[0015] In addition, unless otherwise specified, in the drawings, "upper" means the upper direction or upper side in the drawing, "lower" means the lower direction or lower side in the drawing, "left" means the left direction or left side in the drawing, and "right" means the right direction or right side in the drawing. In addition, in the drawings, the same or equivalent elements or members are given the same reference numerals, and duplicate explanations are omitted.

[0016] The protective film according to the embodiment of the present invention will be described in detail with reference to Figs.

[0017] Fig. 1 is a perspective view showing a protective film of an embodiment according to the present invention, specifically, a perspective view showing a protective film 100. Fig. 1 shows a state in which the protective film 100 is wound around a winding core 50 along the vertical direction (longitudinal direction) V of the protective film 100, and a state in which a part of the protective film 100 is pulled out along the vertical direction (longitudinal direction) V of the protective film 100.

[0018] FIG. 2 is a cross-sectional view of a protective film according to an embodiment of the present invention, specifically, a cross-sectional view of a protective film 100. As shown in FIG.

[0019] The protective film 100 is used, for example, for protecting a moving body, particularly a vehicle, and for preventing a moving body from falling, particularly for preventing falling objects from a vehicle in an accident. The protective film 100 is also used, for example, for preventing scratches on a moving body, particularly for preventing scratches on an automobile bumper, an automobile body, etc.

[0020] The protective film 100 includes a film layer 10 and an adhesive layer 20. The film layer 10 has a first surface 10-1 (a surface of the film layer 10 as a first surface of the film layer 10) and a second surface 10-2 (a rear surface of the film layer 10 as a second surface of the film layer 10) facing the first surface 10-1 (a surface of the film layer 10 as a second surface of the film layer 10). The adhesive layer 20 is provided on the second surface 10-2 (a rear surface of the film layer 10 as a second surface of the film layer 10) of the film layer 10.

[0021] More specifically, in FIG. 2, the adhesive layer 20 has a first surface 20-1 and a second surface 20-2 opposite the first surface 20-1, and the second surface 10-2 (the back surface of the film layer 10 as the second surface of the film layer 10) of the film layer 10 and the first surface 20-1 of the adhesive layer 20 overlap each other, so that the adhesive layer 20 is laminated onto the film layer 10.

[0022] The protective film 100 is in a state in which the first surface 10-1 of the film layer 10 and the second surface 20-2 of the adhesive layer 20 are overlapped with each other and rolled up along the vertical direction (longitudinal direction) V of the protective film 100, as shown in Figure 1.

[0023] The film layer 10 contains a polyethylene-based polymer, and the pressure-sensitive adhesive layer 20 contains an environmentally friendly acrylic water-based pressure-sensitive adhesive. The pressure-sensitive adhesive layer 20 may contain an acrylic water-based pressure-sensitive adhesive.

[0024] The polyethylene-based polymer may include, in addition to known ethylene homopolymers having long chain branches, copolymers modified with a small amount of α-olefin.

[0025] Specifically, examples of polyethylene polymers include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), linear very low density polyethylene (also called "VLDPE" or "ULDPE"), ethylene-aliphatic unsaturated carboxylic acid polymer, ethylene-aliphatic unsaturated carboxylic acid ester copolymer, and soft polymers made of α-olefin copolymers (for example, soft copolymers made of ethylene and / or propylene and one or more α-olefins selected from α-olefins having 4 to 12 carbon atoms or a free combination, and the crystallinity by X-ray method is generally 30% or less). Ethylene-α-olefin copolymers can generally be polymerized using a catalyst called a single-site catalyst or a multi-site catalyst, but those polymerized by a single-site catalyst are particularly preferred. Furthermore, copolymers with any one comonomer selected from ethylene comonomer, butene comonomer, hexene comonomer, and octene comonomer are generally available from many resin manufacturers and are therefore suitable.

[0026] It is preferable that the environmentally friendly acrylic water-based adhesive is compliant with RoHS (Restriction of Hazardous Substances). RoHS (Restriction of Hazardous Substances) is a restriction on the use of certain hazardous substances contained in electrical and electronic equipment, and Article 4 (Precaution) stipulates that member countries must ensure that new electrical and electronic equipment produced after July 1, 2006 does not contain lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers.

[0027] The acrylic water-based pressure-sensitive adhesive has good adhesive strength and holding power, and because it is water-based, it can reduce the environmental impact.

[0028] The acrylic water-based pressure sensitive adhesive is, for example, obtained by crosslinking an acrylic polymer obtained by emulsion polymerization of a polymerizable monomer component essentially containing a carboxyl group-containing ethylenically unsaturated monomer and a specific alkyl (meth)acrylate in an aqueous medium in the presence of a polymerization initiator.

[0029] The protective film 100 is produced, for example, by applying an environmentally friendly acrylic water-based adhesive to the second surface 10-2 of the film layer 10 (the back surface of the film layer 10 as the second surface of the film layer).

[0030] In the protective film 100, the tensile strength in the transverse direction H of the protective film 100 may be any strength, but is preferably 4 N / 25 mm to 12 N / 25 mm, and more preferably 8 N / 25 mm. If the tensile strength in the transverse direction H of the protective film 100 is this preferred tensile strength in the transverse direction H or this more preferred tensile strength in the transverse direction H, the protective film 100 can be cut more easily, and the handleability can be further improved.

[0031] In the protective film 100, the tensile strength in the longitudinal direction V of the protective film 100 may be any strength, but is preferably 10 N / 25 mm to 20 N / 25 mm, and more preferably 15 N / 25 mm. When the tensile strength in the longitudinal direction V of the protective film 100 is this preferred tensile strength in the longitudinal direction V or this more preferred tensile strength in the longitudinal direction V, the durability of the protective film 100 becomes superior, and the handleability can be further improved.

[0032] The adhesive strength of the protective film 100 (the second surface 20-2 of the adhesive layer 20) may be any adhesive strength, but is preferably 2N / 25mm to 6N / 25mm, and more preferably 4N / 25mm. To enable long-term storage (long-term preservability) (for example, storage for 3 months) without leaving any adhesive on a moving object, particularly a vehicle.

[0033] The thickness of the protective film 100 may be any thickness, but is preferably 50 μm to 150 μm (0.15 mm), and more preferably 100 μm (0.1 mm). Depending on the preferred thickness or the more preferred thickness of the protective film 100, for example, a moving body, particularly a vehicle, can be more appropriately protected from scratches.

[0034] The protective film 100 may have an ultraviolet (UV) blocking function. In order to further enhance the ultraviolet (UV) blocking function, a non-colored (or low-colored) ultraviolet blocking agent may be applied to a first surface 10-1 (a surface of the film layer 10 as a first surface of the film layer 10) of the film layer 10 of the protective film 100.

[0035] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0036] 10...film layer, 10-1: First surface (first surface of film layer), 10-2: Second surface (second surface of the film layer), 20... Adhesive layer, 20-1: First surface of adhesive layer; 20-2: Second surface of the adhesive layer; 50···Coil, 100···protective film, H: Horizontal direction of the protective film (width direction of the protective film), V···Vertical direction of the protective film (longitudinal direction of the protective film).

Claims

1. A film layer and a pressure-sensitive adhesive layer, the film layer has a first surface and a second surface opposite to the first surface; the pressure-sensitive adhesive layer is provided on one of the first surface and the second surface, the film layer comprises a polyethylene-based polymer; The pressure-sensitive adhesive layer comprises an environmentally friendly acrylic water-based pressure-sensitive adhesive.

2. The protective film has a tensile strength in a transverse direction of 4 N / 25 mm to 12 N / 25 mm; The protective film according to claim 1, wherein the protective film has a tensile strength in a longitudinal direction of 10 N / 25 mm to 20 N / 25 mm.

3. The protective film according to claim 1 or 2, wherein the adhesive strength of the protective film is 2 N / 25 mm to 6 N / 25 mm.

Images