A kind of manufacturing process of jewelry protective film

Abstract

The invention discloses a manufacturing process of a jewelry protective film. The protective film is composed of the following raw materials in parts by weight: 100 parts of modified polyurethane, 5-10 parts of polyethylene glycol and 100 parts of isopropanol; the specific manufacturing process is as follows: The modified polyurethane and polyethylene glycol were heated to 80-85°C to melt, stirred and mixed for 30 minutes, then slowly added isopropanol, and cooled to 35-40°C while stirring to obtain jewelry protection liquid. At this temperature, use Spray the jewelry protective liquid evenly on the jewelry surface with a spray gun, and let it dry naturally for 1-2 hours to obtain a jewelry protective film; polyurethane has strong adhesion, and the coating film has excellent wear resistance, water resistance and chemical resistance and other excellent properties, but its flame retardancy is relatively poor. The modified polyurethane prepared by the present invention has excellent water resistance and high temperature flame retardancy, and the high temperature stability and oxidation resistance of the jewelry protective film prepared finally are greatly improved. improve.

Description

technical field [0001] The invention belongs to the technical field of jewelry maintenance, and in particular relates to a manufacturing process of a jewelry protective film. Background technique [0002] Jewelry can be divided into broad sense and narrow sense. Jewelry in the narrow sense refers to jade products. In the broad sense, jewelry should include gold, silver and natural materials (minerals, rocks, organisms, etc.), which are collectively referred to as jewelry, handicrafts or other collections with certain value. For jewelry, there is a saying in ancient times "gold and silver jewelry", which distinguishes gold and silver from jewelry. But with the development of society and economy, in addition to natural gemstones and artificial gemstones, the concept of jewelry should be expanded to include gold, silver, jewelry, etc. The industry that deals in these items is collectively referred to as the "jewelry industry". The scope of "jewelry" is much larger than the co...

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Problems solved by technology

[0003] The maintenance of jade is very particular. The existing jewelry protective film is generally coated with a metal film on the surface of the jewelry. When it is close to the fire, the color paste will fade away. If the ancient jade is smoked or roasted by fire, the quality of the jade will be damaged, the color will become darker, or even fade. In addition, jade wares should avoid high temperature. Quality, in daily life, such as gas flames encountered in cooking, open flames of lighters, especially in fires, will cause irreversible loss of jade, therefore, it is very important for the heat insulation and flame retardant protection of jade

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