JPS6121267B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention prevents the ventilation fan from becoming directly contaminated with oil etc. by forming a thin protective film on the surface of the ventilation fan in advance, and also removes oil stains etc. adhering to this film by peeling off this protective film during cleaning. This invention relates to a film-forming agent for ventilation fans that is used to remove the film together with the film. Traditionally, oil stains on ventilation fans have been cleaned using detergents, but this method requires considerable effort and is extremely difficult to remove from dirt that is strongly stuck to the ventilation fan. Have difficulty. For this reason, a solution such as water-soluble resin such as polyvinyl alcohol is applied to the surface of the ventilation fan to form a protective film.This prevents oil and other dirt from directly adhering to the ventilation fan, and also prevents it from being exposed to water during cleaning. A method has been proposed in which dirt is removed at the same time by immersion or by removing this protective film with a cleaning agent (Japanese Patent Application Laid-open No. 54134/1983, Japanese Patent Publication No. 53/1983).
22954 etc.). However, although this method reduces the cleaning effort to some extent, a cleaning operation is required in any case, and problems may arise in terms of water resistance and the like. In addition, a peelable resin film made of polyvinyl butyral is formed on the surface of the ventilation fan to protect the surface of the ventilation fan, and by peeling and removing this protective film during cleaning, it also removes dirt and grime attached to the film. A method for removing . In this case, the ventilation fan film-forming agent that forms such a peelable film includes the ventilation fan material (acrylonitrile-styrene resin, polystyrene, aluminum, painted surface, etc.)
The film should not have any negative effect on the material, the film should form quickly (short drying time), it should have excellent oil resistance, weather resistance, and water resistance, and it should have good removability. The method of forming this peelable film is a very simple method, especially if the film can be easily peeled off and removed. be. However, when polyvinyl butyral is used as the resin, the oil resistance of the film is poor, so
When used for a long time, oil may get mixed into the film, making it difficult to remove. Furthermore, when polyvinyl alcohol, methylcellulose, hydroxypropylcellulose, etc. are used, there are problems with water resistance, etc., and the peeling is not done uniformly, resulting in poor peelability.These resins are not suitable for use in ventilation fans. Therefore, there is a need for a film-forming agent for ventilation fans that can form a film that is excellent in the above-mentioned properties, particularly oil resistance, weather resistance, and water resistance, and has good releasability. In view of the above circumstances, the present inventors conducted intensive research on a film-forming agent for ventilation fans having the above-mentioned characteristics, and found that alcohol-soluble copolymerized nylon is very suitable as a resin for a film-forming agent for ventilation fans. The film obtained from this has excellent oil resistance, weather resistance, and water resistance, and even after long-term use, the film does not mix with oil or crack, and it can be cleaned continuously and uniformly. The present inventors have discovered that the ventilation fan can be easily removed and the ventilation fan can be cleaned easily, and the present invention has been completed. That is, the present invention provides a film-forming agent for ventilation fans, which is obtained by dissolving copolymerized nylon soluble in an alcoholic solvent. The present invention will be explained in detail below. The alcoholic solvent-soluble copolymerized nylon (hereinafter simply referred to as nylon resin) used in the present invention includes nylon 6/66, nylon 66/
610, nylon 6/66/11, and other copolymerized nylons, specifically CM-4000 and CM- manufactured by Toray Industries.
One or more of 8000, CM-9000, M-4, M-12, Diamid MX-100 manufactured by Daicel, etc. is used. The amount of nylon resin blended varies depending on the mode of use, etc., but when forming the film forming agent for ventilation fans for brushing, it is preferably 15 to 25% by weight, and when forming it as an aerosol agent, it is preferably 5% by weight.
The content is preferably 10% by weight. Further, as the alcoholic solvent for the nylon resin, any solvent that can turn the nylon resin into a solution can be used. Specifically, methanol, ethanol, water-methanol, water-ethanol, etc. are used. In terms of stability, a mixture of 80 to 90 parts by weight of ethanol and 10 to 20 parts by weight of water is preferred. Furthermore, in the present invention, since the releasability of the formed film is good, it is not necessarily necessary to incorporate a release agent, but if desired, lauryl alcohol of higher alcohol type, polyether-modified silicone in polysiloxane, etc. may be blended. The film-forming agent for ventilation fans according to the present invention is used by applying it to the surface of the ventilation fan by an appropriate method to form a nylon resin film, and this nylon resin film prevents the ventilation fan from being directly contaminated with oil or the like. Ru. In this case, the formed nylon resin coating has excellent oil resistance, weather resistance, and water resistance, so the coating will not mix with oil or be attacked by oil during use, and will not cause cracks. There is no inconvenience such as generation of water or partial dissolution or peeling off due to water, and the ventilation fan is maintained stably for a long period of time, thus providing good protection for the ventilation fan. In addition, if the nylon resin coating is heavily contaminated with oil or other dirt and the ventilation fan needs to be cleaned, this coating is peeled off. In this case, this nylon resin coating has very good releasability and can be peeled off as a uniform continuous film, so it can be easily removed from the ventilation fan. Dirt attached to the ventilation fan can also be removed, and the ventilation fan can therefore be easily cleaned. In addition, when using this film-forming agent, it is preferable from the viewpoint of film removability that the film thickness is 20 microns or more, particularly 20 to 50 microns. . As explained above, according to the present invention, it is possible to form a film with good oil resistance, weather resistance, and water resistance, and it is possible to protect the ventilation fan well for a long period of time. It can be peeled off as a single film, and ventilation fans can be easily cleaned. Hereinafter, the present invention will be specifically explained with reference to Examples. Example A film-forming agent for ventilation fans with the formulation shown in Table 1 was prepared using nylon resin (copolymerized nylon soluble in ethanol) as the resin, and the film thickness was
It was applied to a polystyrene plate and an aluminum plate (each 10 x 10 cm in size) using an applicator to a thickness of 30 to 40 μm, and dried overnight at room temperature to prepare a test piece coated with a film of the film forming agent. For comparison, comparative test pieces were prepared in the same manner using resin solutions having the formulations shown in Table 1 using other resins. Next, these test pieces were evaluated for oil resistance, weather resistance, water resistance, and peelability by the following methods, and the results shown in Table 2 were obtained. B. Oil resistance test A fixed amount of food oil (rapeseed oil: soybean oil = 1:1) heat-treated at 180°C for 100 hours was applied to a fixed area on each test piece, and the mixture was left in a constant temperature bath at 90°C for 3 days. , evaluate changes in the film. Evaluation criteria ○: No abnormality △: Softened or hardened by oil. ×: Mixes with oil, making the film sticky or hardening rapidly and becoming brittle. (b) Weather resistance test Evaluate the change in the film after 200 hours with a weather meter. Evaluation criteria ○: No abnormality △: Slightly brittle. C. Water resistance test Evaluate changes in the film after storing it in a constant temperature and humidity chamber at 30°C and 80% for one week. Evaluation criteria ○: No abnormality, △: Film swells ×: Film becomes sticky. D. Peelability test Evaluate peelability after leaving in a constant temperature bath at 60℃ for 10 days. Evaluation Criteria ○: Continuously and uniformly peeled off by hand. △: Peeling occurs, but not continuously and uniformly. ×: Adhesion is observed.

【table】

【table】

[Table] In addition, approximately 40μ of each film forming agent No. 1 to 11 was applied to a ventilation fan (made of polystyrene), and after actual use for 6 months, changes in the film were examined. 3rd result
Shown in the table.

【table】

[Table] However, ○: usable; It was confirmed that the adhesive peeled off continuously and uniformly, and could protect the ventilation fan well from direct oil stains and the like, and that oil stains and the like could be easily cleaned.

Claims (1)

[Claims] 1. A film-forming agent for ventilation fans characterized by dissolving copolymerized nylon soluble in an alcoholic solvent.