JPH08654Y2 - Eyeglass frames - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an eyeglass frame composed of eyeglass frame parts having antibacterial and deodorant properties.

(Prior Art) Dirt from sweat, secretions, etc. adhering to the eyeglass frame
Not only does it cause physiological discomfort, but the dirt becomes a breeding source for various bacteria, including Staphylococcus aureus, which is a skin-resident bacteria.

However, since the spectacle frame is structurally supported and contacted with the face and the head, the spectacle frame is mounted on the face and the head, so that the complete antifouling measure is not yet solved.

Therefore, methods for daily cleaning, washing, and parts replacement are generally known, and are practically used as a structural example of a spectacle frame having a replacement function for contact parts of human faces and heads, such as temples and nose pads. Japanese Patent Laid-Open No. 63-122322 discloses a pad having a pad groove formed on the inner surface of a nose pad, in which pads having different pad thicknesses are exchangeably fitted and locked.

(Problems to be solved by the invention) However, as is known in Japanese Utility Model Laid-Open No. Sho 63-122322, the method of exchanging eyeglass frame parts requires a small amount of time for the exchange and the eyeglass parts themselves are small. Since it is a thing, it is difficult to replace it and it cannot be done frequently, so there is a problem that it is difficult to maintain its cleanliness every day. In addition, the cleaning method has a problem of cleaning power of the cleaning device and the need to temporarily stop wearing spectacles, resulting in complexity and inconvenience.

The present invention has been made to solve such a problem, and its purpose is to prevent sweat attached to an eyeglass frame,
It is an object of the present invention to provide an eyeglass frame having an antibacterial action against miscellaneous bacteria proliferating from dirt such as secretions as a generation source.

(Means for Solving the Problems) The present invention has been made to achieve the above-mentioned object, and includes a front portion (...)
It is a spectacle frame. , "A plate-shaped intermediate body is formed by injection-molding any one or more of the lens frames, bridges, nose pads and temples constituting the spectacle frame from chitosan-containing acetyl cellulose pellets,
It is an eyeglass frame characterized by being constructed by processing this plate-shaped intermediate body into the shape of the predetermined component parts.

Chitosan in the present invention means arthropod, annelid,
It is a polysaccharide obtained by deacetylating chitin existing as an organic skeletal substance of molluscs.

The amount of chitosan used varies depending on the degree of deacetylation of chitosan, the material of the spectacle frame, the content, the method of attachment, etc., for example, when chitosan having a deacetylation degree of 80% is mixed with the raw material monomer of the spectacle frame. Is preferably added in an amount of 0.01% by weight or more with respect to the raw material monomer in order to exert substantial antibacterial activity. When chitosan is mixed with the raw material monomer, it is preferable to add an organic acid such as acetic acid, formic acid, or propionic acid, or a dilute aqueous solution in order to dissolve chitosan.

Furthermore, the part where chitosan is used is the part in contact with the wearer in the front part and temple part of the spectacle frame, but it can be contained in other parts as necessary.

Acetate resin (acetyl cellulose) is used as a material that contains chitosan and serves as a substrate for the eyeglass frame. It has been found that when these synthetic resins contain chitosan, they have antibacterial properties without impairing the physical properties required for eyeglass frames. In addition, in combination with chitosan, additives such as a resin curing agent, a filler, a pigment and a coloring material can also be used within a range that does not affect the antibacterial action.

(Function) In the spectacle frame having antibacterial properties according to the present invention, chitosan contained in the spectacle frame itself or adhering to the surface thereof exerts antibacterial properties and prevents generation and growth of Staphylococcus aureus, Bacillus subtilis, etc. To do.

(Example) Hereinafter, the present invention will be specifically described with reference to Examples.
The invention is not limited to these examples.

FIG. 1 is a spectacle frame 1 containing chitosan of the example.

The spectacle frame 1 is provided with a front portion 5 mainly composed of a lens frame 2, a bridge 3 and a nose pad 4 and a temple portion 6, and the front portion 5 and the temple portion 6 are connected via a hinge portion 7.

All of these parts are made by adding chitosan to an acetyl cellulose material which is a kind of acetate resin.

Hereinafter, a method for manufacturing the spectacle frame 1 containing chitosan will be described.

(1) Pre-mixing 99 parts by weight of cellulose as a raw material for the flame matrix component and 1 part by weight of chitosan having a deacetylation degree of 80% were mixed and conditioned with a drier so that the total water content was 4%.

(2) Pretreatment In order to give a smooth and uniform acetylation reaction, 50 parts of acetic acid was added to 100 parts by weight of the chitosan-containing cellulose obtained by the premixing and swelled in the batch.

(3) Acetylation 250 parts by weight of acetic anhydride, 10 parts by weight of sulfuric acid as a catalyst, and 500 parts by weight of acetic acid as a diluent are added to 100 parts by weight of the chitosan-containing cellulose after the pretreatment, and mixed for 5 hours to carry out an acetylation reaction. A homogeneous solution was obtained.

(4) Water Addition and Aging In order to decompose excess acetic anhydride contained in the solution in which the acetylation reaction has been carried out and to further stop the acetylation reaction, water is added to the solution, and the acetic acid concentration of the solution is added. Aged to 85%.

(5) Filtration After the aging, magnesium acetate was added to neutralize the sulfuric acid in the solution. The solution was filtered to remove crystals of magnesium sulfate generated by further addition of magnesium acetate.

(6) Precipitation Dilute acetic acid was added as a precipitating agent to the solution that had been filtered to precipitate the chitosan-containing acetylcellulose derivative as precipitation cotton. After the precipitation was completed, the mixture was allowed to stand for 30 minutes to sufficiently solidify the inside of the precipitated cotton and then deoxidized until the final acid concentration reached 20%.

(7) Washing and Stabilization The precipitated cotton of the acetylcellulose derivative containing chitosan was washed with water until the attached acid was removed.

(8) Dehydration and Drying After washing the precipitated cotton of the acetylcellulose derivative containing chitosan with a centrifugal dehydrator to dehydrate the water to 50%,
It was dried at 130 ° C. for 40 minutes by a hot air circulation type tunnel dryer to make the water content 2%.

(9) Pulverization The dried chitosan-containing acetylcellulose derivative was pulverized with a pulverizer and processed into flakes having a particle size of 5 mesh.

(10) Manufacture of pellets 60 parts by weight of acetyl cellulose derivative containing chitosan processed into flakes, and 38 parts of phthalate ester as a plasticizer.
Parts by weight, 1 part by weight of glycidyl ether as a heat stabilizer and 1 part by weight of phenyl salicylate as an ultraviolet absorber are premixed in a ribbon blender, and then the extruder is operated at a cylinder temperature of 195 ° C., a die temperature of 200 ° C., Using the screw rotation speed of 60 rpm, chitosan-containing acetyl cellulose pellets were produced.

(11) Molding of sheet material The obtained chitosan-containing acetylcellulose pellets were manufactured by an injection molding machine to produce a chitosan-containing acetylcellulose sheet having a width of 22 cm, a length of 64 cm and a thickness of 0.6 cm.

As the molding conditions of the molding machine at this time, the cylinder temperature, the adapter temperature, and the die temperature are 180 ° C to 200 ° C, respectively.
Further, the temperature of the solvent resin for plasticizing the pellets is about 220.
℃, the screw speed of the injection cylinder of the molding machine is 60
It was rpm.

(12) Cutting of Sheet Material The thus obtained acetyl cellulose sheet was cut into a rectangular sheet having a width of 22 cm, a length of 8 cm and a thickness of 0.6 cm by a cutting machine.

(13) Manufacturing of lens frame 2 and bridge 3 Next, this sheet material was cut into a predetermined shape at a machining center to obtain an integral member of the lens frame 2 and the bridge 3 of the spectacle frame 1.

Next, the integrated member of the lens frame 2 and the bridge 3 is polished by a barrel polishing machine and dried, and then a curve is matched so as to match the curve of the lens in a heat press machine (generally, 6 carp is used). And buffed.

(14) Manufacture of temple part 6 and nose pad 4 Next, the shape of the temple part 6 and nose pad 4 is formed by the same cutting method from the same sheet material as the method of manufacturing the lens frame 2 and the bridge 3 described above. It was cut out and polished to obtain a temple part 6 and a nose pad 4, respectively.

The temple portion 6 was fitted with metal fittings to form an arm curve.

(15) Assembling the spectacle frame 1 Next, the nose pad 4 is attached to the nose pad in the center of the lens frame 2.
Was bonded to form the front portion 5, and the temple portion 6 was assembled on both side surfaces of the front portion 5 via the hinge portions 7. As shown in FIG. 2, the hinge portion 7 is composed of a hinge male piece 7a and a hinge female piece 7b. The attachment state is that the hinge female piece 7b is provided at the other end of the temple portion 6 on the side opposite to the ear side. And further, the hinge male piece 7a is arranged at the temple side end of the lens frame 2 of the front portion 5, and the hinge male piece 7a and the hinge female piece 7b are fitted together.
Further, a screw 8 is inserted to connect the temple portion 6 and the front portion 5, and the temple portion 6 can be slidably opened and closed by a hinge portion 7. FIG. 3 is a view showing a mixed state of chitosan 9 in the spectacle frame 1.

(16) Evaluation method Next, regarding the antibacterial action of this spectacle frame, the temperature was measured using the bacterial count method adopted by the “Fabric Products Sanitation Council”.
Staphylococcus aureus colonies 5.0 × 10 ⁴ / cm ² and Bacillus subtilis colonies 4.0 × in a clean atmosphere at 30 ℃ and 70 ℃
10 ⁴ cells / cm ² were attached to each eyeglass frame, and the bacterial reduction rate after 6 hours was determined.

As a result, excellent antibacterial properties were recognized, with the bacterial reduction rates of Staphylococcus aureus and Bacillus subtilis of the eyeglass frame being 93% and 85%, respectively. Furthermore, the wearing feeling of this spectacle frame,
The appearance was good.

[Effect of device]

Since the present invention contains chitosan as described above, it is not necessary to replace the spectacle frame parts such as the nose pads, and the Staphylococcus aureus and Bacillus subtilis do not grow even if they adhere. Therefore, it is possible to provide a clean spectacle frame.

[Brief description of drawings]

FIG. 1 is a perspective view of an eyeglass frame according to the present invention. FIG. 2 is a partially enlarged view of the hinge part of the spectacle frame. FIG. 3 is a sectional view of the spectacle frame of FIG. 1 taken along the line XX ′. DESCRIPTION OF SYMBOLS 1 ... Glasses frame, 2 ... Lens frame, 3 ... Bridge, 4
… Nose pad, 5… Front part, 6… Temple part, 7… Hinge part, 9… Chitosan

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped intermediate body is formed by injection molding one or more components of a lens frame, a bridge, a nose pad, and a temple of a spectacle frame by injection molding with acetylcellulose pellets containing chitosan. A spectacle frame, characterized in that the spectacle frame is formed by processing a shaped intermediate body into the predetermined component shape.