JPWO2018167852A1 - Resin material cleaning method and cleaning agent - Google Patents

Abstract

A method of cleaning a resin material having transparency which can improve transparency and aesthetics easily and speedily without requiring a polishing step, which comprises at least an aliphatic amine, a glycol ether, a nonionic surfactant, After applying the metal sequestering agent and the cleaning agent containing water and containing no abrasive on the surface of the resin material and performing the cleaning step, the resin containing the protective agent containing at least a petroleum solvent, wax and an abrasive is used. And applying a coating step to the surface of the substrate.

Description

  The present invention relates to a method of cleaning a resin material having transparency.

Conventionally, polycarbonate resin or acrylic resin is often used as a resin material excellent in transparency, processability and impact resistance as a canopy of an aircraft, a transparent roofing material, a street lamp, and a lamp cover for a vehicle. However, the resin material having such transparency has a problem that yellowing or fogging occurs due to sunlight or aged deterioration, and it becomes dull.
Patent Document 1 below and Patent Document 2 below disclose a repair method for bringing the surface of a light cover made of polycarbonate close to the initial state.

Patent No. 3756740 gazette Patent No. 5908980 gazette

  As disclosed in Patent Document 1 and Patent Document 2, the lamp cover used in vehicles such as automobiles is often seen to be made of a resin material such as polycarbonate rather than glass for reasons of cost, safety, etc. . However, the cover of the lamp part for vehicles is soiled or scratched by the above-mentioned yellowing, fogging, mud, sand, dust or exhaust gas adhering during traveling, insects which collided, etc., as a result, the lamp part The amount of light decreases, causing problems in the running of the vehicle at the time of poor visibility such as at night, which may impair safety. Moreover, in the case of a resin material having transparency, once it is painted in water and washed, it seems that the dullness is once removed, but if the dirt and yellowish are not removed, the resin material becomes dull again in a short period of time. It will Furthermore, there is also a background that automobile inspection standards of headlights became stricter from 2015, and a method that can clean resin material more easily is required.

In the method of Patent Document 1 described above, it is essential to polish the lens surface to eliminate marks of scratches and to remove the old coating on the lens surface, and to apply a primer thereon and drying it.
In the case of Patent Document 2, after the masking step, it is essential to mount a sandpaper on a special orbital sander to remove the clear coating film that forms the surface of the light cover.

  The present invention has been proposed in view of the above circumstances, and an object thereof is to provide a method of cleaning a resin material which can easily and quickly improve the transparency and the appearance without the necessity of a polishing step. It is to do.

  In order to solve the above-mentioned object, it is a cleaning method of resin material which has transparency, and is a cleaning agent which contains at least aliphatic amine, glycol ether, nonionic surfactant, sequestering agent, water and does not contain abrasives. Performing a cleaning step of applying and wiping on the surface of the resin material, and then performing a finishing step of applying and coating a protective agent containing at least a petroleum solvent, wax, and an abrasive on the surface of the resin material It features.

In the present invention, the abrasive contained in the protective agent is fine particles of 10 microns or less, and the resin material may be a polycarbonate resin or an acrylic resin, and may be used as a light cover of a vehicle.
In the present invention, before the finishing step, a polishing step may be carried out using a polisher to buff the compound material.
It is characterized by
Furthermore, in the present invention, the finishing step may use a rotary polisher to polish the surface with a buff coated with the protective agent.
In the present invention, each of the washing step and the finishing step may be performed a plurality of times.

  According to the method of cleaning a resin material according to the present invention, transparency and aesthetics can be improved easily and speedily without making the polishing process essential.

It is a flowchart which shows the process of the cleaning method of the resin material which concerns on one Embodiment of this invention. It is a flowchart which shows the process of the cleaning method of the resin material which concerns on other embodiment of this invention. It is a photograph which shows the state of the headlight cover before and after applying the cleaning method of the resin material which concerns on Example 1. FIG.

Embodiments of the present invention will be described below with reference to the drawings and tables.
The cleaning method of the resin material according to the present embodiment applies a cleaning agent containing at least aliphatic amine, glycol ether, nonionic surfactant, sequestering agent, and water and containing no abrasive on the surface of the resin material. After performing the wiping cleaning step (SA), a finishing step (SB) is performed in which a protective agent containing at least a petroleum solvent, wax, and an abrasive is applied to the surface of the resin material for coating.
The details will be described below.

  As a resin material to which the cleaning method of the resin material concerning this embodiment is applied, the resin material with transparency which consists of hard plastics, such as a polycarbonate and an acrylic resin, is mentioned. The cleaning agent used in this cleaning method is a non-viscous liquid type that can be lightly wiped off, and this wiping operation does not require any technology. The aliphatic amine contained in the detergent may be monoethanolamine (2-aminoethanol). Ethylene glycol ether may be used as the glycol ether, and poly (oxyethylene) = nonylphenyl ether may be used as the nonionic surfactant. A sequestering agent and water may be contained, and a leveling agent and a phosphate may be further contained. As an example of the component composition ratio of such a detergent, it may be 4.5% by weight of 2-aminoethanol, 3% by weight of ethylene glycol, and 1.7% by weight of poly (oxyethylene) = nonylphenyl ether. . Resin materials to be cleaned are first used to remove stains and yellowing when used in vehicle light cover such as headlight covers, using a compound containing an abrasive in the cleaning agent, or using water resistance of 600 to 800 A method of polishing with paper is often applied. In the conventional cleaning method of polishing in this manner, masking is necessary so as not to damage the vehicle body by mistake, unevenness may occur if the coating is not spread uniformly in a certain direction, or the polished portion may be noticeable. Therefore, technology is required. On the other hand, the cleaning method of the present embodiment has developed and completed a cleaning agent which does not contain any abrasive according to the intensive research of the inventor, thereby eliminating the need for a polishing step. It was possible to clean it by removing the dirt by rooting it off. Therefore, the cleaning method of the present embodiment is characterized in that there is no need for pre-cleaning, coating technology, masking, and the ease of starting the cleaning step (SA).

  Next, the protective agent used in the present embodiment will be described. The protective agent used here is a liquid type that is applied by filling in the fine irregularities on the surface of the resin material and coating the surface, and since it is a liquid with no viscosity, the finishing process (SB) can be performed with a light force. It can be carried out. As petroleum-based solvents contained in the protective agent, mineral spirits and waxes as natural or synthetic may be used, and among the waxes of plant origin, carnauba wax is preferably used. As the abrasive, a fine particle abrasive having an abrasive power of No. 1500 (10 microns) to No. 10000 or more (about 0.5 microns) of a water resistant paper is suitable. The abrasive contained in the protective agent is not a coarse-grained abrasive for polishing in order to remove the stain, since the stains and yellowish have already been removed by the above-mentioned cleaning agent. It is an abrasive for making the surface flat with an infinite number of particles that can get into the slight irregularities on the surface of the resin material. As benzene, 1,3,5-trimethylbenzene, or the like, morpholine, an emulsifier, or water may be contained. Furthermore, in order to impart heat resistance and water repellency, a silicon polymer or a fluorine polymer may be contained, or an ultraviolet absorber for reducing ultraviolet light or an ultraviolet scattering agent may be contained. As an example of the component composition ratio of such a protective agent, 30% by weight of a petroleum solvent, 3% by weight of 1,3,5-trimethylbenzene, and 3% by weight of morpholine may be used.

  The method of cleaning the resin material according to the present embodiment will be further described with reference to FIGS. 1 to 3. In the following examples, the resin material to be cleaned in the examples is a polycarbonate automobile headlight cover having transparency, and before the cleaning and coating is carried out, dirt adheres and yellowing occurs, and the headlight cover is intrinsic We used the one that has lost transparency and gloss (see the photo on the left side of Fig. 3 and before the construction). The waste material used below may be a polyester or nylon microfiber cloth, or a general cotton or cotton flannel towel, but the polyester microfiber cloth is used in the tests of FIGS. 1 and 2 did.

  As shown in FIG. 1, the method of cleaning a resin material according to the present embodiment includes two major steps of performing a cleaning step (SA) and then performing a finishing step (SB). In the washing step (SA), an appropriate amount of the above-mentioned detergent is applied to a dry waste (SA1), and the surface of the headlight cover is lightly wiped off with a waste (SA2). Then, the cleaning agent causes stains, scale and yellowishness, and the stains can be wiped off without a polishing process. When the dirt on the headlight cover adhering to the cloth etc. is reduced, the cleaning process (SA) is ended and the process proceeds to the finishing process (SB). Usually, when the operation of the cleaning step (SA) is repeated two or three times, adhesion of dirt to the waste etc. decreases. Although the process of washing away mud, sand, dust and the like with water before performing the washing step (SA) is not described, the inventors conducted various experiments and found that such prior advance washing step and the like were not performed. However, stubborn dirt such as scale, yellowing, etc. could be wiped off with a light force if the above-mentioned detergent was used. Although some cleaning agents do not exert their detergency unless they have a dry surface, it has not been found that the detergency decreases even if some water remains, with the above-mentioned detergent. Furthermore, since no abrasive is contained in the cleaning agent, there is no possibility that the headlight cover will be damaged by the cleaning. In this cleaning step (SA), if the dirt on the edge of the headlight cover is also wiped with a rag or the like to which the above-mentioned cleaning agent is applied, it is possible to prevent reflection of dirt on the headlight cover and finish more cleanly is there.

Next, the finishing process (SB) is performed. Apply an appropriate amount of the above-mentioned protective agent to a dry cloth (SB1) and polish the surface of the headlight cover with a cloth. There is no need to use a polishing force as in the case of a conventionally used headlight cover compound, and it is sufficient to polish the headlight cover so that it may be lightly and browsed several times. In the present embodiment, if the cleaning step (SA) is performed, the transparency of the resin material can be restored. However, since the transparency becomes inferior with the passage of time, this finishing step (SB) is essential, and by performing the finishing step (SB) following the cleaning step (SA), it is possible to extend over a long period of time The inventor's experiment showed that the transparency can be maintained and secured. The right side of Fig. 3 and a photograph after construction are attached to show the state after construction. At this time, the use as a protective agent can not be realized by other protective agents, and it is essential that the above-mentioned protective agents are used.
If you want to do it relatively quickly and you want to do it relatively quickly, two steps (SA → SB) using a rag are enough, and the required time can be done to clean one headlight cover in a total of 3 to 5 minutes. .

If unevenness due to scratches etc. is noticeable on the surface of the headlight cover, or if you want to carefully perform the finishing process (SB), use a polisher as shown in the flow on the right side of FIG. You may go. The material of the buff is not particularly limited, but wool, wool, urethane, paper, cloth, etc. do not require polishing power. Add an appropriate amount of the above-mentioned protective agent to the buff (SB3), and buff with a polisher (SB4). At this time, if heat is applied at 50 to 60 ° C., the protective agent can be intruded into and penetrated the fine unevenness on the surface of the resin material, and the transparency of the resin material is further increased over a long period of time. Secured and maintained. If heat of 60 ° C. or more is applied for a long time, it causes a crack, which requires attention. However, according to this embodiment, since it is sufficient to carry out for several minutes, it is possible to suppress the concern of the crack.
Then brush the headlight cover with the surface of the headlight cover lightly and lightly brushed several times (SB5). In the case of the finishing step (SB) using this polisher, the surface of the headlight cover can be finished to be more glossy as compared to the case of finish with waste.
The polisher used herein is not particularly limited, such as a single polisher, a random polisher, an orbiter sander, etc., but the polishing force is not necessary as described above. In this finishing step (SB), the hood of the car is opened, and the edge portion of the headlight cover covered by the bonnet of the car is wiped with a rag or the like to which a protective agent is applied. It is possible to prevent reflection and to make the finish more beautiful.
Even when finishing with buffing using a polisher in the finishing step (SB), the time required for the two steps (SA → SB) can be used to clean one headlight cover in a total of 5 to 7 minutes.

Next, a cleaning method in which a polishing step (SC) is added to the above-described resin material cleaning method will be described with reference to FIG. Since the cleaning step (SA) and the finishing step (SB) are the same as described above, the description will be omitted. This polishing step (SC) is effective when small scratches on the surface of the headlight cover are noticeable.
After performing the above-mentioned cleaning step (SA), the vehicle body (body) is protected by masking or the like (SC1). Apply a commercially available compound to the sponge buff (SC2) and drive the polisher to buff (SC3). At this time, heat may be applied to perform buffing, but since the dirt and yellowing adhering to the surface of the headlight cover have already been removed, the buffing time can be shortened and heat should be applied. Can reduce damage to the surface of the headlight cover. Then wipe the compound with a dry rag (SC4).
Thereafter, the above-mentioned finishing step (SB) is performed.
As described above, even if the polishing step (SC) is performed between the cleaning step (SA) and the finishing step (SB), the dirt, yellowing, etc. adhering to the surface of the headlight cover can be speedily done in the cleaning step (SA). Since cleaning is possible, one headlight cover can be cleaned in 8 minutes to 12 minutes for the entire travel time.

  As shown in Fig. 1 and Fig. 2, the time required for headlight cover cleaning is longer as the number of processes increases, but within 12 minutes there is no yellowing / smearing of one headlight cover. The headlight cover's original light transmission and gloss have been restored. Moreover, if it was made a polite process, the gloss was different, but in any case, it was not confirmed that the yellowish or cloudy again occurred and the headlight cover was dull.

<Evaluation test>
Subsequently, five types of commercially available cleaners for headlight cover were prepared, and a comparative test was performed with the cleaners and the protective agents used in the cleaning method according to the present embodiment. Table 1 summarizes the difference between Example 1 and Comparative Examples 1 to 5 in terms of the properties and components of the liquid and the cleaning method. Example 1 and Comparative Example 1 are to be cleaned using two different agents, while Comparative Examples 2 to 5 are to be cleaned with one agent. Table 2 summarizes evaluations of Example 1 and Comparative Examples 1 to 5. The cleaning method to evaluate was performed according to the description of the construction manual attached to each, and the thing with a waste and a block used the exclusive item as an accessory.

Example 1
First, in Example 1, the cleaning step (SA) and the finishing step (SB) were performed with the cleaning agent and the protective agent according to the above-described embodiment. In the finishing step (SB), finish was performed by polishing with a rag without using a polisher.
In Example 1, wearing gloves is basically unnecessary. There is no need for application techniques such as pre-cleaning and uniformly spreading the cleaning agent or protecting agent on the surface. A drying process is also unnecessary, and it dries from the place which is performing the finishing process (SB).
In Example 1, a polyester microfiber cloth was used as the waste.
Example 1 Evaluation
At the stage of the cleaning step (SA), the scale of the surface of the headlight cover, such as dirt, yellowing and water marks, was wiped with a light wipe and the transparency of the resin material could be restored. In addition, by performing the finishing step (SB) in which the protective agent is applied, the resin material is dulled even after the construction, no fogging occurs, and the transparency of the headlight cover can be maintained.

Comparative Example 1
As in Example 1, cleaning is performed using two agents, a cleaning agent and a protecting agent. According to the installation instructions, first, pre-cleaning is recommended. Car wash in advance, wipe off moisture with a dry rag, shake gloves thoroughly and shake the cleaning agent together as an accessory. Apply a small amount to the attached microfiber cloth. And brush in a certain direction. At this time, it was noted that it would be difficult for yellowishness and dullness to fall when brushing in a circle, so it was brushed in a certain direction. And before this solution dries, blow up with a clean surface of microfiber cloth.
Next, a glove was worn, a rag was wound on a block attached as an accessory, a protective agent was applied on one side, and work was performed so that it could be spread uniformly in a certain direction.
Comparative Example 1 Evaluation
In the cleaning agent of Comparative Example 1, as shown in Table 2, surface dirt was removed. However, the yellowing and the hardened scale did not almost fall after repeated work.
The protective agent of Comparative Example 2 was described as saying "It is better not to apply repeatedly," but it is difficult to spread evenly at one time, and remove fine blocks (edges) and remove only blocks. It took time for the construction, such as the need to polish. In addition, after applying the protective agent, a drying step is required, so care was taken to prevent dust, water, and the like from being applied until it was completely cured. Furthermore, since the protective agent is of the type that reacts with the moisture in the air and cures, care must be taken when used up. When the amount of the protective agent was too large, streaks appeared after coating, requiring attention to the amount applied. It took more than 30 minutes to dry the whole process. Although the post-construction transparency can be said to be, since it did not have a yellowish color, it was a finish that can not be said to be as transparent as a new product.

Comparative Example 2
According to the construction manual, pre-cleaning is first recommended. Therefore, the car was washed in advance, water was wiped off with a dry rag, and then the areas other than the headlight cover were masked. Shake the cleaning agent thoroughly with the container, and then apply a small amount to the cotton towel attached as an accessory. And it applies to the headlight cover surface. After the application, it was finished with another towel so that the marks would not be noticeable immediately.
Comparative Example 2 Evaluation
The construction itself is easy, and it takes less than 5 minutes, except for the pre-cleaning time. However, the coating agent that coats the surface of the headlight cover has not been able to remove dirt. Therefore, in the pre-cleaning, even if the surface dirt can be dropped to some extent, yellowing and hardened scale can not be dropped, so that the finished product can not be said to be as transparent as new.

Comparative Example 3
According to the construction manual, pre-cleaning is first recommended. Therefore, the car was washed in advance, water was wiped off with a dry rag, and then the areas other than the headlight cover were masked. Shake the cleaning agent thoroughly with the container, then wrap a microfiber rag on the block attached as an accessory, and apply a small amount of cleaning agent to the rag. And it applies in a fixed direction.
Comparative Example 3 Evaluation
Because of the viscosity of the cleaning agent, it was difficult and even forceful to spread evenly to avoid unevenness. And it was necessary to remove the block and polish the fine part (edge) only with the rag, and it took time for the construction. After that, work was done to wipe up with the cloth for the attached wiping, but if the cleaning agent is not spread well, unevenness will appear, and coating technology is required. In addition, since it was not possible to remove the dirt after the pre-cleaning, it was not possible to remove yellowish or cured scale, and the finish was not as transparent as that of a new product. It took more than 20 minutes to remove the pre-cleaning and masking in the entire process, and even if it took time, it did not become satisfactory.

Comparative Example 4
According to the construction manual, pre-cleaning is first recommended. Therefore, the car was washed in advance, water was wiped off with a dry rag, and then the areas other than the headlight cover were masked. Shake the cleaning agent thoroughly with the container, and then apply a small amount of cleaning agent to the microfiber cloth provided as an accessory. While pressing the surface on which the cleaning agent was placed against the surface of the headlight cover, polishing was repeated repeatedly in a certain direction. After that, I wiped with another clean cloth.
Comparative Example 4 Evaluation
Although the cleaning agent is somewhat viscous, it is not easy to spread, and it spreads when it is repeatedly polished. However, it needs to be polished many times, and it takes power. Although it became transparent after many times of polishing, it had a yellowish color and a hardened scale, so it did not have transparency like a new one. Even after pre-cleaning and masking in the entire process, it took more than 15 minutes to polish until it became transparent, so it took more than 15 minutes and did not give a satisfactory finish over time.

Comparative Example 5
According to the instruction manual, pre-cleaning is recommended first. Car wash in advance, wipe off the moisture with a dry rag, and then apply a small amount of cleaning agent to the nelcloth attached as an accessory. After spreading lightly and polishing it repeatedly along the vertical and horizontal directions. After that, I wiped it up with the clean nelcloth that was attached as one more accessory.
Comparative Example 5 Evaluation
Since the cleaning agent is a compound, it is somewhat viscous but has no difficulty in spreading, and it is a thing that spreads repeatedly and polishing. However, it needs to be polished many times, and it takes power. After that, if it is wiped with another clean nel cloth, transparency will be obtained if polished as many times as in Comparative Example 4, but yellowish or hardened scale remains, so that it has transparency like a new one. I could not say the finish. It took more than 20 minutes to complete the entire process, except for pre-cleaning, and even if it took time, it did not become satisfactory.

If the cleaning method of the resin material in the present embodiment is a method of performing the cleaning step (SA) and the finishing step (SB) using the above-described cleaning agent and protective agent, the other operation steps and the instruments to be used are: You may select it suitably according to the situation. In addition, although the cleaning method of the headlight cover is specifically described here and the evaluation test is performed, the light cover includes a blinker, a tail lamp and the like in addition to the headlight cover. It may be used for cleaning a visor for rain protection as a resin part for vehicles. Furthermore, it is needless to say that the present invention can be applied to cleaning methods for aircraft canopy, transparent roofing materials, street lights and the like. According to the cleaning method of the resin material in the present embodiment, it is possible to easily and quickly improve the transparency and the aesthetic appearance regardless of whether the person who is not familiar with the construction is a general person or a young and old man or woman.

The present invention relates to a cleaning method and a cleaning agent for a resin material having transparency.

The present invention has been proposed in view of the above-mentioned circumstances, and an object thereof is a cleaning method and cleaning method for a resin material which can easily and quickly improve transparency and aesthetics without requiring a polishing step. To provide an agent .

In order to solve the above-mentioned object, it is the cleaning method and cleaning agent of resin material which has transparency, and contains at least aliphatic amine, glycol ether, nonionic surfactant, sequestering agent, water, and contains an abrasive. After applying a cleaning agent to the surface of the resin material with a non-cleanser to float the dirt of the resin material and wiping it off, a protective agent containing at least a petroleum solvent, wax and an abrasive is applied to the surface of the resin material It is characterized in that it is applied, coated, polished and subjected to a finishing process.

According to the cleaning method and cleaning agent for a resin material according to the present invention, transparency and aesthetics can be improved easily and speedily without making the polishing process essential.

Claims (5)

A method of cleaning a resin material having transparency,
After applying a cleaning process containing at least an aliphatic amine, glycol ether, nonionic surfactant, sequestering agent, and water and containing no abrasive on the surface of the resin material, the cleaning process is carried out.
A cleaning method of a resin material, comprising performing a finishing step of applying and coating a protective agent containing at least a petroleum solvent, wax, and an abrasive on the surface of the resin material. In claim 1,
The abrasive contained in the protective agent is fine particles of 10 microns or less,
The resin material is a polycarbonate resin or an acrylic resin, and is used as a vehicle lamp cover. In claim 1 or claim 2,
A cleaning method of a resin material, characterized by performing a polishing process with a buff coated with a compound material using a polisher before the finishing process. In any one of claims 1 to 3,
The method for cleaning a resin material according to claim 1, wherein the finishing step comprises polishing the surface with a buff coated with the protective agent using a rotary polisher. In any one of claims 1 to 4,
A method of cleaning a resin material, wherein the cleaning step and the finishing step are each performed a plurality of times.

Images