Method for producing fragrance-attached polymer article

Abstract

To provide a production method for a polymer article on which a fragrance is attached across its entire surface.SOLUTION: A method for producing a fragrance-attached polymer article includes a step of mixing a fragrance water, which contains water and a fragrance and has a fragrance level of 0.005 mass% to 5 mass% and a temperature of 5°C to 80°C with a molded polymer body for at least 5 minutes to provide a molded polymer body having the fragrance water attached thereto, and a step of drying the molded polymer body having the fragrance water attached thereto at a temperature of 30°C or more and 90°C or less for 50 minutes to 240 minutes.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a fragrance - adhering polymer product.

Background Art

[0002] Weak points of polymer products include unpleasant odors such as rubber odor, petroleum odor, and vinyl odor. To overcome these weak points, there is a technique of adding a deodorant, activated carbon, etc. to reduce the unpleasant odor to some extent. However, since the deodorizing effect of deodorants and activated carbon is not high, improvement is necessary.

[0003] There is also a technique of blending a fragrance into a material. However, due to heating during the manufacturing process, the fragrance volatilizes, and the unpleasant odor cannot be sufficiently reduced. Also, due to chemical treatment, etc., some fragrance components are taken away, the quality of the fragrance changes, and there is a concern that the deteriorated fragrance and the unpleasant odor of the polymer product are mixed, resulting in a more unpleasant odor.

[0004] There is a technique aiming at an unpleasant odor reduction effect by spraying a material containing a fragrance or applying a fragrance stock solution. However, since it is difficult to uniformly adhere the fragrance to the entire polymer product, there are portions where the fragrance is applied and portions where it is not, and an unpleasant odor can be felt from the portions where the fragrance is not applied.

[0005] For example, Patent Document 1 discloses a natural rubber - based latex composition characterized by containing a polyphenol having a molecular weight of 10,000 or more in natural rubber - based latex.

[0006] Patent Document 2 discloses a rubber composition for tires containing a rubber component and at least one fragrance selected from the group consisting of cedrene, cedrol, cedrenol, methyl jasmonate, dihydro methyl jasmonate, and anethole, and having a natural rubber content of 40% by mass or more in 100% by mass of the rubber component.

[0007] Patent Document 3 discloses a rubber composition for tires used in the formation of tires, which contains a rubber component made of natural rubber, 25 parts by mass or more and 80 parts by mass or less of silica with respect to 100 parts by mass of the rubber component, and 0.2% by mass or more and 0.9% by mass or less of a natural fragrance of the rubber composition for tires.

[0008] Patent Document 4 discloses a rubber additive containing at least one fragrance (A) having an ester structure in the molecule and having a total carbon number of 3 to 13.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0010] The present invention has been made in view of the above circumstances, and an object thereof is to provide a manufacturing method for attaching a fragrance to an entire polymer article.

Means for Solving the Problems

[0011] The manufacturing method of the fragrance-attached polymer article of the present invention that solves the above problems is as follows. A step of mixing a fragrance water containing water and a fragrance, having a fragrance concentration of 0.005% by mass to 5% by mass and a temperature of 5°C to 80°C, and a polymer molded body for 5 minutes or more to obtain a polymer molded body to which the fragrance water adheres. A step of drying a polymer molded article to which perfume water has adhered at a temperature of 30°C or higher and 90°C or lower for 50 minutes to 240 minutes is provided.

Effect of the Invention

[0012] According to the production method of the present invention, perfume can be adhered to the entire polymer article.

Mode for Carrying Out the Invention

[0013] The method for producing a perfume - adhered polymer article of the present invention includes a step of mixing perfume water containing water and perfume, having a perfume concentration of 0.005% by mass to 5% by mass and a temperature of 5°C to 80°C, and a polymer molded article for 5 minutes or more to obtain a polymer molded article to which the perfume water has adhered; A step of drying a polymer molded article to which perfume water has adhered at a temperature of 30°C or higher and 90°C or lower for 50 minutes to 240 minutes is provided.

[0014] The method for producing a perfume - adhered polymer article of the present invention includes a step of mixing perfume water containing water and perfume, having a perfume concentration of 0.005% by mass to 5% by mass and a temperature of 5°C to 80°C, and a polymer molded article for 5 minutes or more to obtain a polymer molded article to which the perfume water has adhered.

[0015] The polymer material for forming the polymer molded body is not particularly limited. Examples of the polymer material include polyesters such as polybutylene terephthalate (PBT) and polyethylene terephthalate (PET); polyolefins such as polyethylene (PE) and polypropylene (PP); (meth)acrylic resins; acrylonitrile-butadiene-styrene copolymer (ABS resin); acrylonitrile-styrene copolymer (AS resin); epoxy resins; polyamides (PA); polyurethanes (PU); polyimides (PI); polyphenylene ethers (PPE); polysulfones (PSF); polyethersulfones (PES); polyphenylene sulfides (PPS); polyarylates (PAR); polyamideimides (PAI); polyetherimides (PEI); polyetheretherketones (PEEK); polytetrafluoroethylene (PTFE); polyaminobismaleimide (PABM); polybisamidotriazole; polyphenylene oxides (PPO); polyacetals; polycarbonates (PC), and the like. These may be used alone or in combination of two or more.

[0016] Also, as the polymer molded body, a molded body made of rubber is also preferable. Examples of the rubber include butyl rubber, isoprene rubber, polybutadiene rubber, styrene-butadiene rubber, natural rubber, chloroprene rubber, nitrile rubbers such as acrylonitrile-butadiene rubber, hydrogenated nitrile rubbers, norbornene rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, acrylic rubber, ethylene·acrylate rubber, fluororubber, chlorosulfonated polyethylene rubber, epichlorohydrin rubber, silicone rubber, urethane rubber, polysulfide rubber, phosphazene rubber or 1,2-polybutadiene, and the like. These may be used alone or in combination of two or more.

[0017] The molded article made of a polymer used in the present invention is not particularly limited as long as it is a polymer material molded into a desired shape. The method for molding the molded article made of a polymer is not particularly limited as long as it can be molded according to the properties of the polymer material. Examples of the molding method include cutting, sewing, injection molding, press molding, extrusion molding, drawing molding, T-die method, calendar molding, compression molding, blow molding, vacuum molding, casting, transfer molding, dipping method, and the like. In addition, the molded article made of a polymer used in the present invention includes knitted fabrics, woven fabrics, etc. made of polymer fibers.

[0018] The fragrance used in the present invention can be appropriately selected according to the desired scent, and is preferably at least one selected from the group consisting of terpenes, ester compounds, aromatic compounds, ether compounds, aldehyde compounds, alcohol compounds, ketone compounds, lactone compounds, and nitrogen-containing compounds.

[0019] Examples of fragrances that give a refreshing feeling and a cool feeling include limonene (terpenes: lemon scent), menthol (alcohol compound: mint scent), menthone (ketone compound: mint scent), terpineol (alcohol compound: lime scent), citral (aldehyde compound: lemon scent), camphor (ketone compound: mint scent), anethole (ether compound: fennel scent), estragole (ether compound: tarragon scent), 1,8-cineole (ether compound: eucalyptus, sage, laurel scent), eugenol (alcohol compound: clove, pimento scent), cumin aldehyde (aldehyde compound: cumin scent), cinnamyl aldehyde (aldehyde compound: cinnamon scent), and the like.

[0020] Examples of the fragrance that gives a soothing feeling include, for example, cucumber alcohol (alcohol compound: the scent of melon and watermelon), aldehyde C-8 (aldehyde compound: the scent of orange), cucumber aldehyde (aldehyde compound: the scent of melon and watermelon), vanillin (aldehyde compound: the scent of vanilla), nootkatone (ketone compound: the scent of grapefruit), raspberry ketone (ketone compound: the scent of raspberry), ethyl caprate (ester compound: the scent of rum and brandy), allyl caproate (ester compound: the scent of pineapple), isoamyl acetate (ester compound: the scent of banana), ethyl acetate (ester compound: the scent of melon and grape), styralyl acetate (ester compound: the scent of grapefruit), hexyl acetate (ester compound: the scent of apple and pear), ethyl butyrate (ester compound: the scent of pineapple), coconut aldehyde (lactone compound: the scent of coconut), peach aldehyde (lactone compound: the scent of peach), methyl anthranilate (nitrogen-containing compound: the scent of grape), rose oxide (ether compound: the scent of rose), geraniol (alcohol compound: the scent of geranium), linalool (alcohol compound: the scent of lavender), β-phenethyl alcohol (alcohol compound: the scent of rose), cyclamen aldehyde (aldehyde compound: the scent of cyclamen), α-ionone (ketone compound: the scent of violet), cis-jasmone (ketone compound: the scent of jasmine), benzyl acetate (ester compound: the scent of jasmine), and the like.

[0021] The fragrance used in the present invention may be hydrophilic or hydrophobic. In the present invention, it is preferable to use a hydrophobic liquid (at 25 °C) fragrance.

[0022] The perfume solution used in the present invention contains a perfume and water. The concentration of the perfume solution is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, still more preferably 0.03% by mass or more, preferably 5% by mass or less, more preferably 3% by mass or less, and still more preferably 1% by mass or less. By setting the concentration of the perfume solution to 0.005% by mass or more, a sufficient amount of perfume can be imparted to reduce the unpleasant odor of the article. Also, by setting the concentration of the perfume solution to 5% by mass or less, the production cost can be reduced and the environmental load during drainage can be suppressed.

[0023] The temperature of the perfume solution is preferably 5°C or higher, more preferably 8°C or higher, still more preferably 10°C or higher, preferably 80°C or lower, more preferably 60°C or lower, and still more preferably 50°C or lower.

[0024] If the temperature of the perfume solution is 5°C or higher, the dilution and dispersibility of the perfume in water are excellent. Also, if the temperature of the perfume solution is 80°C or lower, the perfume can be imparted to the molded article to some extent, and the unpleasant odor can be reduced. Furthermore, if the temperature of the perfume solution is 50°C or lower, the volatilization of the perfume can be suppressed and the amount of perfume used can be reduced. As a result, the production cost can be reduced and the environmental load during drainage can be suppressed.

[0025] The mixing time of the perfume solution and the polymer molded article is preferably 5 minutes or more, more preferably 8 minutes or more, and still more preferably 10 minutes or more. By setting the mixing time to 5 minutes or more, sufficient time can be ensured to mix the perfume solution and the polymer molded article, and the variation in the fragrance of the resulting polymer article can be suppressed. From the viewpoint of enhancing productivity, the mixing time is preferably 60 minutes or less.

[0026] In the mixing of the perfume solution and the molded article made of a polymer, the amount of perfume used per 100 g of the molded article made of a polymer is preferably 0.001 g or more, more preferably 0.01 g or more, still more preferably 0.1 g or more, preferably 20 g or less, more preferably 10 g or less, and still more preferably 2 g or less. If the amount of perfume used is within the above range, the unpleasant odor of the molded article made of a polymer can be sufficiently reduced.

[0027] The mixing of the perfume solution and the molded article made of a polymer is preferably carried out using a rotary mixing device such as a drum washing machine, a vertical washing machine, an impregnation device, or a stirring tank, and more preferably carried out using a rotary mixing device such as a drum washing machine. Further, it is preferable to carry out the mixing in a closed system while suppressing the volatilization of the perfume.

[0028] The method for producing a perfume-attached polymer article of the present invention includes a step of drying a molded article made of a polymer to which a perfume solution has adhered at a temperature of 30°C or higher and 90°C or lower for 50 minutes to 240 minutes.

[0029] In order to dry the molded article firmly, it is preferable that the drying time is 50 minutes or more. Further, by setting the drying time to 240 minutes or less, the volatilization of the perfume can be suppressed and the amount of perfume used can be reduced. As a result, the production cost and the environmental load at the time of wastewater discharge can be suppressed.

[0030] Further, it is more preferable that the drying temperature is 30°C or higher and 60°C or lower, and the drying time is 100 minutes to 180 minutes. By drying at a relatively low temperature for 100 minutes to 180 minutes, the volatilization of the perfume can be further suppressed and the amount of perfume used can be reduced.

[0031] The drying is preferably carried out using, for example, a drum dryer, and more preferably carried out using a drum washing and drying machine for mixing and drying.

[0032] The manufacturing method of the fragrance - adhering polymer article of the present invention can be preferably applied, for example, as a manufacturing method of gloves made of rubber or resin. In the manufacturing method of gloves made of rubber or resin of the present invention, in the final washing step of the molded body of rubber gloves or gloves made of resin, it is preferable to use a fragrance - containing water containing water and fragrance.

[0033] Rubber gloves are manufactured, for example, by vulcanizing a rubber film formed by a known latex dipping method such as the dipping method, the heat - sensitive method, the coagulation method, etc. Among the latex dipping methods, the dipping method is a method of repeatedly performing a step of dipping a glove - shaped mold or a woven or non - woven fabric (to be the backing material) shaped like a glove into a rubber latex such as natural rubber latex or synthetic rubber latex, pulling it out, and drying it one or more times to form a rubber film. Also, the heat - sensitive method is a method of dipping a pre - heated mold or the like into a rubber latex added with a heat - sensitive coagulant, attaching a gelled rubber latex to its surface, and then pulling it out and drying it. Further, the coagulation method is a method of attaching cations (such as calcium ions) to the surface of the mold, aggregating rubber particles in the negatively charged latex on the surface of the mold, and then pulling it out and drying it.

[0034] The manufacturing method of the rubber gloves of the present invention by the dipping method has a step of treating the surface of a hand - shaped mold corresponding to the three - dimensional shape of the rubber gloves with a coagulant (hereinafter, also referred to as the "coagulant treatment step") and a step of dipping the treated hand - shaped mold into a latex composition (hereinafter, also referred to as the "dipping step").

[0035] First, the coagulant treatment step will be described. In the coagulant treatment step, a hand - shaped mold corresponding to the three - dimensional shape of the rubber gloves is prepared. As the hand - shaped mold, known hand - shaped molds used in the manufacture of rubber gloves, such as hand - shaped molds made of pottery and hand - shaped molds made of metal, can be used.

[0036] As the coagulant, known coagulants used in the manufacture of rubber gloves can be used. Examples of the coagulant include calcium nitrate, calcium chloride, etc. The coagulant is usually used in the form of a solution (e.g., aqueous solution, methanol solution, etc.) as a coagulating liquid.

[0037] The treatment with the coagulant can be carried out, for example, by immersing the hand mold in a coagulating liquid (preferably an aqueous solution of the coagulant), pulling it out, and then drying it. In this way, a hand mold with the coagulant adhering to its surface can be obtained.

[0038] Next, the rubber latex composition will be described. A liquid latex composition in an unvulcanized or pre-vulcanized state is prepared by blending various additives such as a vulcanizing agent into the rubber latex.

[0039] As the rubber, any of various rubbers that can be latexized from natural rubber and synthetic rubbers can be used. Examples of such rubbers include one or more of natural rubber, deproteinized natural rubber, acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), etc.

[0040] Examples of the vulcanizing agent for vulcanizing the rubber include sulfur and organic sulfur compounds. Sulfur is particularly preferred. The blending ratio of the vulcanizing agent is preferably 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the rubber content (solid content) in the rubber latex.

[0041] In the latex composition containing the rubber and the vulcanizing agent, various additives such as a vulcanization accelerator, a heat stabilizer, a vulcanization accelerator aid, an anti-aging agent, a filler, a surfactant, a thickener, a foaming agent, a plasticizer, and a coloring agent may be further blended.

[0042] Among these, examples of the vulcanization accelerator include one or more of PX (zinc N-ethyl-N-phenyldithiocarbamate), PZ (zinc dimethyldithiocarbamate), EZ (zinc diethyldithiocarbamate), BZ (zinc dibutyldithiocarbamate), MZ (zinc salt of 2-mercaptobenzothiazole), TT (tetramethylthiuram disulfide), etc.

[0043] The compounding ratio of the vulcanization accelerator is preferably 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the rubber component in the rubber latex.

[0044] Examples of the vulcanization accelerator assistant include zinc white (zinc oxide) and / or stearic acid. The compounding ratio of the vulcanization accelerator assistant is preferably 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the rubber component in the rubber latex.

[0045] As the anti-aging agent, generally non-staining phenols are preferably used, but amines may also be used. The compounding ratio of the anti-aging agent is preferably 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the rubber component in the rubber latex.

[0046] Examples of the filler include one or more of kaolin clay, hard clay, calcium carbonate, titanium oxide The compounding ratio of the filler is preferably 1 part by mass or more and 10 parts by mass or less per 100 parts by mass of the rubber component in the rubber latex.

[0047] The surfactant is compounded to disperse the various additives well in the rubber latex. Examples of the surfactant include one or more of anionic surfactants. The compounding ratio of the surfactant is preferably 0.3 parts by mass or more and 1 part by mass or less per 100 parts by mass of the rubber component in the rubber latex.

[0048] In the dipping process, the hand mold is immersed in the latex composition for a certain period of time and then pulled out, so that the latex composition adheres to the surface of the hand mold. Then, the pulled-out hand mold is heated to dry the latex composition and vulcanize the rubber, or after drying once, the hand mold is heated to vulcanize the rubber to form a rubber film.

[0049] Then, by inverting the formed film inside out and demolding it from the hand mold, a molded body of the rubber glove can be obtained. In the step of washing the obtained molded body, it is preferable to use a perfume solution containing a perfume and water.

[0050] Also, in a preferred embodiment of the present invention, a chlorination treatment is performed to prevent adhesion between the films of the molded body of the rubber glove after demolding. In the chlorination treatment, the molded body of the rubber glove after demolding is immersed in a chlorination treatment liquid in which chlorine gas is contained in water. It is preferable to perform the chlorination treatment by immersing the molded body of the rubber glove after demolding in the chlorination treatment liquid at 10°C to 50°C for 5 minutes to 60 minutes.

[0051] After the chlorination treatment is completed, the molded body of the rubber glove is taken out from the chlorination treatment liquid and washed. In a more preferred embodiment of the present invention, in the washing step after the chlorination treatment, a perfume solution containing water and a perfume is used.

[0052] A glove made of a resin integrally formed by a resin film can be manufactured in the same manner as above, except that an emulsion composition prepared by blending various additives into an emulsion of the resin is used instead of the rubber latex composition.

[0053] Examples of the resin include one or more resins that can be emulsified, such as polyurethane and acrylic resins. Various additives such as a heat stabilizer, an anti-aging agent, a filler, a surfactant, a thickener, a foaming agent, a plasticizer, and a coloring agent may be blended into the emulsion composition containing the resin.

[0054] Among these, examples of the anti-aging agent include one or more of the non-staining phenols and amines exemplified above. The blending ratio of the anti-aging agent is preferably 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the resin component (solid content) in the emulsion.

[0055] As the filler, one or more of the exemplified fillers may be used. The blending ratio of the filler is preferably 1 part by mass or more and 10 parts by mass or less per 100 parts by mass of the resin component in the resin emulsion.

[0056] As the surfactant, one or more of the exemplified anionic surfactants and the like may be used. The blending ratio of the surfactant is preferably 0.3 part by mass or more and 1 part by mass or less per 100 parts by mass of the resin content in the emulsion.

[0057] Also, a crosslinking agent for crosslinking the polyurethane, acrylic resin, etc. may be blended in an appropriate ratio in the emulsion composition.

[0058] The production method of the present invention can be adopted as a production method for various polymer products. Examples of the polymer product with fragrance attachment obtained by the production method of the present invention include rubber gloves, umbrellas, rain shoes, raincoats, hats, bags, carpets, toys, sundries, stationery, etc.

Examples

[0059] Hereinafter, the present invention will be described in detail by way of examples. However, the present invention is not limited by the following examples, and any changes and embodiments within the scope not departing from the spirit of the present invention are all included in the scope of the present invention.

[0060] [Odor evaluation method] One skilled evaluator evaluated the rubber odor and fragrance odor based on the following criteria. 0: Do not feel an odor. 1: Slightly feel an odor. 2: Feel an odor.

[0061] [Production of rubber gloves] Example 1 To 100 parts by mass of a natural rubber latex composition, 0.3 part by mass of ammonia casein as a stabilizer, 0.3 part by mass of a nonionic surfactant, 0.4 part by mass of an aqueous potassium hydroxide solution, 1 part by mass of sulfur as a vulcanizing agent, 1 part by mass of zinc butyldithiocarbamate [Nocceler BZ] as a vulcanization accelerator, 1 part by mass of a vulcanization aid (ZnO), and 1 part by mass of an antioxidant [CPL] are blended to prepare a latex composition for the dipping method.

[0062] With the surface of a pottery hand mold in a state of being coagulated with an aqueous calcium nitrate solution, it was immersed in the above latex composition, pulled out, heated at 100 °C for 1 hour, and then demolded to obtain a rubber glove molded body.

[0063] Thereafter, in order to prevent adhesion between latexes, chlorine gas was dissolved in water, and the rubber glove molded body was put into the chlorination treatment liquid for surface treatment (chlorination treatment).

[0064] 3.5 g of a hydrophobic fragrance was mixed with 6996.5 g of water to prepare a fragrance water with a concentration of 0.05 mass%. From the chlorination treatment liquid, the rubber glove molded bodies (12 pieces) were taken out and put into the fragrance water. The rubber glove molded bodies and the fragrance water were mixed to remove chlorine and attach the fragrance to the rubber glove molded bodies. The mixing was carried out at 30 °C for 10 minutes. The amount of fragrance used at this time was 0.29 g (=(7000 g×0.05 / 100) / 12) per one glove (about 15 g). However, the above amount is the amount of fragrance contained in water, and the fragrance adhering to the glove is less than that amount.

[0065] The rubber glove molded bodies were taken out from the fragrance water and dried at 50 °C for 100 minutes. The mixing step and the drying step were carried out using a drum washing machine. The rubber glove molded bodies were put into the drum washing machine, and while rotating, the rubber glove molded bodies and the fragrance water were mixed, then dehydrated, and heated and dried while rotating the gloves.

[0066] Example 2 A fragrance - attached rubber glove was produced in the same manner as in Example 1 except that the fragrance water concentration was 0.005 mass%.

[0067] Example 3 A rubber glove with fragrance was produced in the same manner as in Example 1, except that the fragrance water concentration was 0.03% by mass.

[0068] Example 4 A rubber glove with fragrance was produced in the same manner as in Example 1, except that the fragrance water concentration was 0.5% by mass.

[0069] Example 5 A rubber glove with fragrance was produced in the same manner as in Example 1, except that the fragrance water concentration was 5% by mass.

[0070] Example 6 A rubber glove with fragrance was produced in the same manner as in Example 1, except that the temperature of the fragrance water was 50°C and it was mixed for 10 minutes.

[0071] Example 7 A rubber glove with fragrance was produced in the same manner as in Example 1, except that the temperature of the fragrance water was 80°C and it was mixed for 10 minutes.

[0072] Example 8 A rubber glove with fragrance was produced in the same manner as in Example 1, except that the temperature of the fragrance water was 30°C and it was mixed for 5 minutes.

[0073] Example 9 A rubber glove with fragrance was produced in the same manner as in Example 1, except that it was dried at a temperature of 60°C for 180 minutes.

[0074] Example 10 A rubber glove with fragrance was produced in the same manner as in Example 1, except that it was dried at a temperature of 60°C for 240 minutes.

[0075] Example 11 A rubber glove with fragrance was produced in the same manner as in Example 1, except that it was dried at a temperature of 90°C for 100 minutes.

[0076] Comparative Example 1 A fragrance - attached rubber glove was produced in the same manner as in Example 1, except that the concentration of the fragrance solution was 0.001% by mass.

[0077] Comparative Example 2 A fragrance - attached rubber glove was produced in the same manner as in Example 1, except that the temperature of the fragrance solution was 100°C and it was mixed for 10 minutes.

[0078] Comparative Example 3 A fragrance - attached rubber glove was produced in the same manner as in Example 1, except that it was dried at 60°C for 360 minutes.

[0079] Comparative Example 4 A fragrance - attached rubber glove was produced in the same manner as in Example 1, except that it was dried at 120°C for 100 minutes.

[0080] Comparative Example 5 To 100 parts by mass of a natural rubber - based latex composition, 0.3 part by mass of ammonia casein as a stabilizer, 0.3 part by mass of a non - ionic surfactant, 0.4 part by mass of an aqueous potassium hydroxide solution, 1 part by mass of sulfur as a vulcanizing agent, 1 part by mass of zinc butyldithiocarbamate [Nocceler BZ] as a vulcanization accelerator, 1 part by mass of a vulcanization aid (ZnO), and 1 part by mass of an antioxidant [CPL] were blended to prepare a latex composition for the dipping method.

[0081] The surface of a pottery hand - mold was coagulated with an aqueous calcium nitrate solution and then immersed in the above - mentioned latex composition, pulled out, heated at 100°C for 1 hour, and then demolded to obtain a rubber glove molded body.

[0082] Thereafter, to prevent adhesion of the latexes, chlorine gas was dissolved in water, and the rubber glove molded body was put into the chlorination treatment liquid for surface treatment (chlorination treatment).

[0083] The rubber glove molded bodies (12 pieces) after chlorination treatment were put into 7000 g of water, washed at 30°C for 10 minutes to remove chlorine.

[0084] The formed rubber glove was taken out from the washing water and dried at 50°C for 100 minutes. The washing process and the drying process were carried out using a drum washing machine. The formed rubber glove was put into the drum washing machine, and while rotating, the formed rubber glove was washed, then dehydrated, and heated and dried while rotating the glove. 0.3 g of fragrance was applied to the formed rubber glove after drying using a measuring spoon.

[0085] Comparative Example 6 To 100 parts by mass of a natural rubber latex composition, 0.3 part by mass of ammonia casein as a stabilizer, 0.3 part by mass of a nonionic surfactant, 0.4 part by mass of an aqueous potassium hydroxide solution, 1 part by mass of sulfur as a vulcanizing agent, 1 part by mass of zinc butyldithiocarbamate [Nocceler BZ] as a vulcanization accelerator, 1 part by mass of a vulcanization assistant (ZnO), 1 part by mass of an antioxidant [CPL], and 2 parts of a fragrance were blended to prepare a latex composition for the dipping method. At this time, the usage amount of the fragrance was 0.36 g per glove.

[0086] With the surface of a pottery hand mold coagulated with an aqueous calcium nitrate solution, it was immersed in the above latex composition, pulled out, heated at 100°C for 1 hour, and then demolded to obtain a formed rubber glove.

[0087] Thereafter, in order to prevent adhesion between latexes, chlorine gas was dissolved in water, and the formed rubber glove was put into the chlorination treatment liquid for surface treatment (chlorination treatment).

[0088] The formed rubber gloves (12 pieces) after chlorination treatment were put into 7000 g of water and washed at 30°C for 10 minutes to remove chlorine.

[0089] The formed rubber glove was taken out from the washing water and dried at 50°C for 100 minutes. The washing process and the drying process were carried out using a drum washing machine. The formed rubber glove was put into the drum washing machine, and while rotating, the formed rubber glove was washed, then dehydrated, and heated and dried while rotating the glove.

[0090] The details of the manufacturing method and the evaluation results are shown in Tables 1 and 2.

[0091]

Table 1

[0092]

Table 2

[0093] From the results of Examples 1 to 5 and Comparative Example 1 with different perfume water concentrations, when the perfume water concentration was 0.005% to 5% by mass, the rubber odor intensity was 0 to 1. When the perfume water concentration was 0.03% by mass or more, the rubber odor intensity was 0 and the effect of reducing rubber odor was higher. When the perfume water concentration was 0.001% by mass, there was no rubber odor reduction effect (Comparative Example 1).

[0094] Comparing the results of Examples 1, 6, 7 and Comparative Example 2 with different perfume water temperatures, if the temperature of the perfume water was 50°C or lower (Examples 1 to 6), the rubber odor could be sufficiently reduced. When it reached 80°C (Example 7), the rubber odor reduction effect became slightly weaker. When the temperature of the perfume water was 100°C (Comparative Example 2), there was no rubber odor reduction effect. From these results, it can be said that a lower perfume water temperature is more suitable.

[0095] From the results of Examples 1 and 8 with different mixing times of perfume water and the polymer molded body, when the mixing time was 5 minutes, the rubber odor intensity was higher than when the mixing time was 10 minutes. In order to further reduce the rubber odor, it is preferable to set the mixing time to 10 minutes or more.

[0096] Comparing the results of Examples 1, 9 to 11 and Comparative Examples 3 to 4 with different drying temperatures and times, if the drying temperature was relatively low, 60°C or lower, even when the drying time was 240 minutes (Example 10), a rubber odor reduction effect was observed. When the drying temperature was 120°C (Comparative Example 4), the perfume volatilized and there was no rubber odor reduction effect.

[0097] When comparing the results of Example 1, Comparative Examples 5 and 6 with different methods of applying the fragrance, there was no effect of reducing the rubber odor when the undiluted fragrance was applied to the rubber gloves (Comparative Example 5) or when the fragrance was incorporated into the film of the rubber gloves (Comparative Example 6). When the undiluted fragrance was applied to the rubber gloves, the applied areas had a fragrance odor and the rubber odor intensity was low. However, since it was difficult to apply the fragrance evenly, the rubber odor was felt from the areas where the fragrance was not applied.

[0098] When the fragrance was incorporated into the film of the rubber gloves, it was incorporated at the raw material stage. Therefore, the fragrance volatilized and deteriorated during the subsequent heating, chlorination treatment, and washing processes, and there was no effect of reducing the rubber odor. Also, when the fragrance was mixed in the rinsing water (Example 1), the amount of fragrance used per glove was 0.29 g and the rubber odor intensity was 0, while the amount of fragrance used in the undiluted application was 0.3 g, and the amount of fragrance used in the incorporation into the film was 0.36 g, but the rubber odor intensity was 2.

[0099] From the results in Tables 1 and 2, it can be seen that the rubber gloves obtained by the production method of the present invention have a low intensity of rubber odor and a high intensity of fragrance odor.

Industrial Applicability

[0100] The production method of the present invention is useful for reducing the odor of molded articles made of polymers. The present invention is suitable as a method for producing rubber gloves.

[0101] A preferred embodiment (1) of the present invention is a step of obtaining a polymer molded article with the fragrance water adhering thereto by mixing a fragrance water containing water and a fragrance, having a fragrance concentration of 0.005% by mass to 5% by mass and a temperature of 5°C to 80°C, and a polymer molded article for 5 minutes or more; a method for producing a fragrance - adhering polymer article, characterized by having a step of drying the polymer molded article with the fragrance water adhering thereto at a temperature of 30°C or higher and 90°C or lower for 50 minutes to 240 minutes.

[0102] A preferred embodiment (2) of the present invention is the method for producing a fragrance - adhering polymer article according to embodiment (1), wherein the fragrance water concentration is 0.01% by mass to 5% by mass.

[0103] A preferred embodiment (3) of the present invention is a method for producing a fragrance - adhering polymer article according to embodiment (1) or (2), which is mixed with a fragrance solution at a temperature of 50°C or lower.

[0104] A preferred embodiment (4) of the present invention is a method for producing a fragrance - adhering polymer article according to any one of embodiments (1) to (3), in which a fragrance solution and a polymer - made molded body are mixed for 10 minutes or longer.

[0105] A preferred embodiment (5) of the present invention is a method for producing a fragrance - adhering polymer article according to any one of embodiments (1) to (4), which is dried at a temperature of 30°C or higher and 60°C or lower for 100 minutes to 180 minutes.

[0106] A preferred embodiment (6) of the present invention is a method for producing a fragrance - adhering polymer article according to any one of embodiments (1) to (5), in which the polymer - made molded body is a molded body of a rubber glove.

[0107] A preferred embodiment (7) of the present invention is a method for producing a fragrance - adhering polymer article according to embodiment (6), in which the molded body of the rubber glove is produced by dipping a hand mold into a rubber latex composition, pulling up the hand mold, and drying the rubber latex composition adhering to the surface of the hand mold, and the obtained molded body of the rubber glove is treated with a chlorination treatment liquid containing chlorine and is the molded body of the rubber glove taken out from the chlorination treatment liquid.

Claims

1. A step of mixing a perfume water containing water and a perfume, having a perfume concentration of 0.005% by mass to 5% by mass and a temperature of 5°C to 80°C, with a molded article made of a polymer for 5 minutes or more to obtain a molded article made of a polymer to which the perfume water adheres; A method for manufacturing a perfume - attached polymer article, comprising a step of drying the molded article made of a polymer to which the perfume water adheres at a temperature of 30°C or higher and 90°C or lower for 50 minutes to 240 minutes.

2. The method for manufacturing a perfume - attached polymer article according to Claim 1, wherein the perfume water concentration is 0.01% by mass to 5% by mass.

3. The method for manufacturing a perfume - attached polymer article according to Claim 1, wherein the mixing is carried out with perfume water at a temperature of 50°C or lower.

4. The method for manufacturing a perfume - attached polymer article according to Claim 1, wherein the perfume water and the molded article made of a polymer are mixed for 10 minutes or more.

5. The method for manufacturing a perfume - attached polymer article according to Claim 1, wherein the drying is carried out at a temperature of 30°C or higher and 60°C or lower for 100 minutes to 180 minutes.

6. The method for manufacturing a perfume - attached polymer article according to Claim 1, wherein the molded article made of a polymer is a molded article of a rubber glove.

7. The molded article of the rubber glove is obtained by dipping a hand mold into a rubber latex composition, pulling up the hand mold, and drying the rubber latex composition adhering to the surface of the hand mold to produce a molded article of a rubber glove, and then treating the obtained molded article of the rubber glove with a chlorination treatment liquid containing chlorine. The method for manufacturing a perfume - attached polymer article according to Claim 6, wherein the molded article of the rubber glove is the molded article of the rubber glove taken out from the chlorination treatment liquid.

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