JPH081082A - Coating method of resin bumper - Google Patents

Abstract

PURPOSE:To improve appearance quality by preventing the stripping of a coating film at the position of the parting line of a V-shaped groove in a resin bumper having the parting line of the V-shaped groove on the surface. CONSTITUTION:This resin bumper is top coated after applying a masking parting tape 3 at the position of the parting line 2 of the V-shaped groove on the base surface of the plasma treated resin bumper 1 and applying a primer 6 on the periphery of the masking parting tape 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin bumper coating method.

[0002]

2. Description of the Related Art As shown in FIG. 1, there is a resin bumper 1 such as polypropylene having a V-shaped groove parting line 2 on the surface thereof. The conventional method for coating such a resin bumper 1 is as follows: 1.1.1. Trichloroethane vapor cleaning or 1.1.1. Spray cleaning with a naphthenic solvent instead of 1.1.1. Trichloroethane, plasma treatment after drying, and V-shaped groove A masking parting tape is attached to the parting line 2 and then overcoated and baked.

[0003]

In the resin bumper coated by the above-mentioned conventional coating method, the coating film on the parting line of the V-shaped groove may be peeled off during high-pressure car washing or the like.

[0004] In order to prevent the bleeding of the parting line when the masking parting tape is attached to the parting line of the V-shaped groove, the masking parting tape is pressure-bonded by rubbing with a finger on the masking parting tape. At this time, not only on the masking parting tape but also on the plasma-treated surface of the periphery B, the plasma treatment effect is weakened and the adhesion of the top coat film is weakened.

Further, 1.1.1. During cleaning with trichloroethane or the like, the antioxidant or the like in the material of the resin bumper is melted and extracted, and flows into the V-shaped groove of the parting line, which also hinders the plasma treatment. ing.

An object of the present invention is to provide a resin bumper coating method which solves the above problems.

[0007]

According to the method of the present invention for achieving the above object, a masking parting tape is attached to a parting line part of a V-shaped groove on the surface of a base material of a plasma-treated resin bumper, and the masking parting tape It is characterized in that a primer is applied to the periphery and then overcoated.

[0008]

According to the above-mentioned method, even if the plasma treatment around the parting line B of the V-shaped groove is obstructed or the treatment effect is weakened, the adhesion of the top coat is secured by the primer coat applied to the periphery. It

[0009]

Embodiment An embodiment of the present invention will be described below with reference to FIG. 1 is 1.1.1. Trichloroethane steam cleaning or 1.1.
1. A resin bumper having a plasma-treated surface 7 on the surface of the substrate which is plasma-treated by spray washing with a naphthene-based solvent instead of trichloroethane, dried, and 2 is a parting line of a V-shaped groove.

In the method of the present invention, a masking parting tape 3 is attached to the parting line 2 of the V-shaped groove, and a masking cover 4 is applied on the masking parting tape 3.
Then, the primer 6 is applied to the periphery B of the masking parting tape 3 and then overcoated.

As shown in FIG. 2, the primer 6 is applied by a primer paint touch pen 8 or spray coating.

Even if the plasma treatment of the plasma-treated surface 7 on the periphery B of the masking parting tape 3 is hindered by the coating film of the primer 6 applied to the periphery of the masking parting tape 3, or the treatment effect is weakened, the top coat Adhesion of the film is secured, and peeling of the coating film at the parting line 2 of the V-shaped groove is prevented.

[0013]

As described above, according to the method for coating a resin bumper according to the present invention, a masking parting tape is attached to the parting line of the V-shaped groove on the surface of the base material of the plasma-treated resin bumper, and the primer is provided around the masking parting tape. It is characterized in that the primer coating is applied to the periphery of the masking parting tape at the parting line of the V-shaped groove so that the adhesion of the top-coating film is secured and The appearance quality can be improved by preventing the coating film from peeling off at the parting line of the groove.

[Brief description of drawings]

FIG. 1 is a perspective view of a resin bumper.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view showing the method of the present invention.

[Explanation of symbols]

 1 Resin bumper 2 Parting line of V-shaped groove 3 Masking parting tape 4 Masking cover 6 Primer 7 Plasma treated surface

Claims (1)

[Claims] 1. A resin bumper characterized in that a masking parting tape is attached to a parting line portion of a V-shaped groove on a surface of a base material of a plasma-treated resin bumper, and a primer is applied to the periphery of the masking parting tape and then overcoated. How to paint.