JP2012102260A - Detergent for hand form and method for producing rubber glove using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detergent for a hand form which can effectively wash off stains attached on the hand form in a short time through in-line washing in a production method of rubber gloves especially in consecutive line style, and a method for producing rubber gloves including a washing step using the detergent for the hand form.SOLUTION: This detergent for the hand form contains at least one selected from the group of surfactants having a polyoxyethylene group in the molecule. The production method includes consecutively producing rubber gloves G by consecutively circulating a plurality of hand forms in turn among respective steps of a pre-treatment step 1, dipping step 2, film-forming step 3 and demolding step 4, and further includes a washing step 5 of washing the hand form, from which a film is demolded in the demolding step 4, using the detergent for the hand form, drying and then sending the hand form to the pre-treatment step 1.

Description

  The present invention relates to a hand-type cleaning agent suitable for hand-type cleaning used in manufacturing a rubber glove having a film made of an elastomer such as rubber, and a hand mold using the hand-type cleaning agent. The present invention relates to a method for manufacturing rubber gloves including a washing step.

Rubber gloves (including elastomers other than rubber, that is, those made of a soft resin, etc., the same applies hereinafter) mainly composed of a film made of an elastomer such as rubber are easy to use or inexpensive. In addition to general households, it is widely used in a wide range of fields such as factories, medical facilities, and sports.
As a method of manufacturing a rubber glove, a hand mold corresponding to the three-dimensional shape of the rubber glove is immersed in the liquid that is the basis of the film, and is pulled up and dried, and in the case of rubber, the hand mold is vulcanized. A so-called dipping method in which the mold is removed from the mold is well known.

Specifically, for example, a hand mold formed of, for example, earthenware is prepared, and the hand mold is dipped in a coagulant solution (mostly an aqueous calcium nitrate solution) and then pulled up and dried for a predetermined time. A coagulant component (calcium nitrate or the like) contained in the coagulant solution is attached (pretreatment step).
Next, the hand mold is dipped in an immersion liquid containing an elastomer that forms a film, for example, in the case of rubber, an immersion liquid containing rubber latex as a main component, and then pulled up, so that the surface of the hand mold is An immersion liquid is adhered (immersion process).

Next, the immersion liquid adhered to the surface by heating the hand mold is dried, and in the case of rubber, the film is formed by vulcanization (film formation process).
When the film is removed from the hand mold (demolding step), a rubber glove mainly composed of the film is obtained.
As a method of manufacturing a rubber glove by the dipping method, the respective steps are lined up, a plurality of hand dies are prepared, and the plurality of hand dies are continuously circulated in order between the steps. A manufacturing method called a continuous line type is used. According to such a continuous line type manufacturing method, mass production of rubber gloves is possible.

  In the continuous line type manufacturing method, as the production of rubber gloves is repeated, dirt adheres to the surface of the hand mold that circulates between the processes, and the hand mold with the dirt attached is the next rubber glove. When used in a production cycle, the dirt may prevent the coagulant solution or immersion liquid from adhering to the hand mold, resulting in variations in the thickness of the film or, in severe cases, pores in the film. It is known to cause defects.

In order to prevent the occurrence of defects due to the adhesion of dirt, it is necessary to wash the hand mold.
As a hand-type cleaning method, the line is temporarily stopped, the hand mold is removed from the line for cleaning, and a cleaning process is provided between the demolding process and the pretreatment process, and the hand mold is not removed from the line. In addition, in a series of manufacturing processes, there is in-line cleaning in which cleaning is performed for each manufacturing time.

As a specific method for cleaning a hand mold, for example, a cleaning agent is sprayed onto the hand mold by jet spray or the like, or the hand mold is immersed in the cleaning agent.
As the cleaning agent, for example, warm water, an acidic aqueous solution such as hydrochloric acid, an alkaline aqueous solution such as sodium hydroxide, or the like is generally used.
Of the above, offline cleaning allows careful cleaning of the hand mold, but during that time the production line must be stopped, leading to a reduction in the productivity of rubber gloves.

On the other hand, according to in-line cleaning, hand-type cleaning and production of rubber gloves can be continued without stopping the line, so that the productivity of rubber gloves can be maintained, but sufficient considering the productivity. Since the cleaning time cannot be secured, there is a tendency that a sufficient cleaning effect cannot be obtained particularly by cleaning using the conventional cleaning agent.
Therefore, it is common to combine in-line cleaning for each manufacturing time with periodic off-line cleaning for a plurality of manufacturing times.

In the field of solid rubber and plastic molding, several cleaning agents for effectively cleaning the mold have been proposed.
For example, Patent Literature 1 describes a mold cleaning agent for molding a silicone lens made of an aqueous solution containing a tetraalkylammonium hydroxide at a ratio of 0.5 to 75% by mass. Patent Document 2 describes a mold cleaning composition containing an aqueous colloidal silica and a polycarboxylate. Further, Patent Document 3 discloses a mold cleaning agent mainly composed of a polyhydric alcohol that does not denature at 130 to 150 ° C., a strong alkali added thereto, and a surfactant that does not denature at 130 to 150 ° C. Are listed.

JP 2009-227772 A JP 2008-222823 A JP-A-11-90398

The cleaning agents described in Patent Documents 1 to 3 are all suitable for cleaning dirt adhering to a mold in a molding process of solid rubber or plastic, but manufacturing rubber gloves by a dipping method. It is not always optimal for removing dirt adhering to the hand mold in the process, and it is difficult to obtain a sufficient cleaning effect in a short time, especially in in-line cleaning.
An object of the present invention is to provide a hand-type cleaning agent capable of effectively cleaning dirt attached to a hand mold in a short time by in-line cleaning, particularly in a method for producing a continuous line type rubber glove, and the hand-type cleaning agent. It is providing the manufacturing method of the rubber glove including the washing | cleaning process using this.

In order to solve the above-mentioned problems, the inventor diligently analyzed and examined the dirt adhering to the hand mold. As a result, it has been found that a surfactant having a polyoxyethylene group in the molecule is extremely effective for removing the dirt. The reason is not clear, but the inventor thinks as follows.
That is, dirt that adheres to the hand mold during the manufacturing process of the rubber glove is hydrophobic, and therefore prevents any aqueous coagulant solution or immersion liquid from adhering to the hand mold. Further, since it is hydrophobic, it is difficult to remove it with an aqueous cleaning agent such as warm water, acidic aqueous solution, or alkaline aqueous solution.

However, the surfactant has a function of promoting the release from the hand mold by adsorbing the polyoxyethylene group contained in the molecule to the hydrophobic dirt, so that the dirt can be effectively removed. it can.
Accordingly, the present invention is a hand-type cleaning agent comprising at least one selected from the group of surfactants having a polyoxyethylene group in the molecule.

The hand-type cleaning agent of the present invention preferably contains an alkali compound.
Since the alkali compound has a function of accelerating the decomposition of the dirt attached to the hand mold, the dirt can be more effectively removed.
The hand-type cleaning agent of the present invention preferably also contains a lower alcohol.
The lower alcohols improve the penetrability of the hand-type cleaning agent, and work to penetrate the hand-type cleaning agent into the details of the hand molds more effectively. Can be removed.

The hand-type cleaning agent of the present invention can be used for hand-type cleaning in a method of manufacturing a rubber glove other than a continuous line type or in an off-line cleaning in the method of manufacturing a continuous line type rubber glove. Thus, since it is excellent in the effect which removes the stain | pollution | contamination adhering to a hand type | mold efficiently in a short time, it can be used especially suitably for the in-line washing | cleaning in a continuous line type manufacturing method.
That is, the present invention provides a rubber glove provided with a film made of an elastomer such as rubber.
(1) a pretreatment step in which a hand mold corresponding to the three-dimensional shape of the rubber glove is dipped in a coagulant solution, pulled up and dried;
(2) a dipping process in which the hand mold is dipped in a dipping solution containing an elastomer that is the basis of the film and then pulled up;
(3) a film forming step for forming the film by heating the hand mold; and
(4) Demolding step of demolding the film from the hand mold,
A manufacturing method in which a plurality of hand dies are continuously circulated in order between each of the steps, and the hand dies after demolding the film in the demolding step are washed and dried. The rubber | gum characterized by including the washing | cleaning process sent to the said pre-treatment process after that, and washing | cleaning a hand type | mold using the detergent for hand molds of any one of the said Claim 1 thru | or 3 in the said washing | cleaning process. A method for manufacturing gloves.

  In the manufacturing method of the present invention, it is preferable that the liquid temperature of the hand-type cleaning agent is set to 50 ° C. or higher and 70 ° C. or lower in the cleaning step and used for hand-type cleaning. By setting the liquid temperature of the cleaning agent for hand molds in the temperature range, the penetration of the cleaning agent for hand molds into the soil and the interaction (adsorption) of the surfactant as a main component with respect to the soil are promoted, The dirt adhering to the hand mold can be efficiently removed in a shorter time.

  According to the present invention, particularly in a method for producing a continuous line type rubber glove, a hand-type cleaning agent capable of effectively cleaning stains attached to a hand mold in a short time by in-line cleaning, and the hand-type cleaning agent. The manufacturing method of the rubber glove including the washing process using can be provided.

It is a flowchart explaining the flow of a hand type in an example of the manufacturing method of the rubber glove of the present invention.

<Hand cleaning agent>
The hand-type cleaning agent of the present invention contains at least one selected from the group of surfactants having a polyoxyethylene group in the molecule.
In particular, an aqueous hand cleaning agent in which the surfactant is dissolved in water is preferable. The aqueous hand-type cleaning agent can be handled in the same manner as the aqueous coagulant liquid and aqueous immersion liquid in the rubber glove production line, and has the advantage of being easy to handle and highly safe. is there.

The type of the surfactant is not particularly limited, but various surfactants such as anionic and nonionic surfactants can be used.
Among these, examples of the anionic surfactant include one or more of polyoxyethylene lauryl ether sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether sulfate triethanolamine, and the like.

  Nonionic surfactants include, for example, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene alkyl ether, polyoxyethylene mystyryl ether, polyoxyethylene One or more of ethylene octyldodecyl ether, polyoxyethylene alkylene alkyl ether, polyoxyethylene distyrenated phenyl ether, polyoxyethylene tribenzyl phenyl ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene alkenyl ether, etc. Is mentioned.

Among these, polyoxyethylene polyoxypropylene glycol is preferable in terms of the effect of removing dirt.
The blending amount of the surfactant is preferably 5% by mass or more, particularly preferably 10% by mass or more, and preferably 25% by mass or less, particularly preferably 20% by mass or less, based on the total amount of the hand-type cleaning agent.
When the blending amount is less than the above range, there is a possibility that the effect of adsorbing and removing the dirt described above, that is, the cleaning effect, may not be sufficiently obtained by the surfactant. Moreover, even if it exceeds the said range, the effect beyond it will not be acquired and it is not preferable in terms of cost etc. Moreover, there is a possibility that it takes time and effort for waste liquid treatment.

The hand-type cleaning agent of the present invention preferably contains an alkali compound.
Since the alkali compound has a function of accelerating the decomposition of the dirt attached to the hand mold, the dirt can be more effectively removed.
Although the kind of alkali compound is not particularly limited, for example, a strong alkali compound such as sodium hydroxide or potassium hydroxide is preferable from the viewpoint of accelerating the decomposition of dirt.

The blending amount of the alkali compound is preferably 0.5% by mass or more, particularly preferably 1% by mass or more, and more preferably 20% by mass or less, particularly preferably 10% by mass or less, based on the total amount of the hand-type cleaning agent.
If the blending amount is less than the above range, there is a possibility that the effect of accelerating the decomposition of dirt due to the inclusion of the alkali compound cannot be obtained sufficiently. Moreover, even if it exceeds the said range, the effect beyond it will not be acquired and it is not preferable in terms of cost etc. Moreover, there is a possibility that it takes time and effort for waste liquid treatment.

The hand-type cleaning agent of the present invention preferably also contains a lower alcohol.
Lower alcohols improve the penetrability of hand cleaners and allow the hand cleaners to penetrate well into the details of hand molds, thus removing dirt attached to the details more effectively. can do.
Although the kind of lower alcohol is not specifically limited, For example, 1 type (s) or 2 or more types, such as methanol, ethanol, and isopropanol, are preferable from viewpoints of the said osmosis | permeation effect, cost, ease of handling, etc.

The blending amount of the lower alcohols is 0.5% by mass or more, particularly 1% by mass or more, preferably 10% by mass or less, particularly preferably 5% by mass or less, based on the total amount of the hand-type cleaning agent. .
If the blending amount is less than the above range, there is a possibility that the effect of improving the permeability of the hand-type cleaning agent due to the inclusion of the lower alcohol may not be sufficiently obtained. Moreover, even if it exceeds the said range, the effect beyond it will not be acquired and it is not preferable in terms of cost etc. Moreover, there is a possibility that it takes time and effort for waste liquid treatment.

<Method of manufacturing rubber gloves>
The hand-type cleaning agent of the present invention can also be used for hand-type cleaning in a method for manufacturing rubber gloves other than a continuous line type, or in an off-line cleaning in the method for manufacturing a continuous line type rubber glove.
However, since it is particularly excellent in the effect of efficiently removing the dirt adhering to the hand mold in a short time, the rubber glove provided with a film made of an elastomer such as rubber is continuously applied by the continuous line type rubber glove manufacturing method of the present invention. It is preferable to use it for hand-type in-line cleaning when it is manufactured.

  FIG. 1 is a flowchart for explaining the flow of a hand mold in an example of the method for producing rubber gloves of the present invention. Referring to FIG. 1, in the manufacturing method of this example, a plurality of hand molds corresponding to the three-dimensional shape of rubber gloves are prepared, and the plurality of hand molds are preprocessed step 1, dipping step 2, and film forming step. 3 and rubber gloves G are continuously manufactured by continuously circulating in order between the steps of the demolding step 4. As the hand mold, a mold formed of pottery or metal is used as in the prior art.

In the pretreatment step 1 among the above, the hand mold is dipped in a coagulant solution and then pulled up and dried for a predetermined time, thereby attaching a coagulant component to the surface of the hand mold. As the coagulant solution, a calcium nitrate aqueous solution or the like is used as in the prior art.
In the next dipping step 2, the hand mold with the coagulant component attached to the surface in the previous pretreatment step 1 is dipped in a dipping solution containing an elastomer that is the basis of the film for a certain time, and then pulled up. The immersion liquid is adhered to the surface of the hand mold.

As the immersion liquid, for example, in the case of rubber, various additives such as a vulcanizing agent, a vulcanization accelerator, a vulcanization acceleration auxiliary (activator), an anti-aging agent, a filler, and a dispersing agent are added to rubber latex. Then, an immersion liquid which has been unvulcanized or pre-cured is used.
As the rubber, natural rubber and various rubbers that can be made into latex from synthetic rubber can be used. Examples of such rubber include natural rubber, deproteinized natural rubber, NBR, and styrene-butadiene rubber ( 1 type, or 2 or more types, such as SBR) and chloroprene rubber (CR).

Examples of the vulcanizing agent include sulfur and organic sulfur-containing compounds. The addition amount of the vulcanizing agent is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the solid content (rubber content) in the rubber latex.
Examples of the vulcanization accelerator include PX (zinc N-ethyl-N-phenyldithiocarbamate), PZ (zinc dimethyldithiocarbamate), EZ (zinc diethyldithiocarbamate), BZ (zinc dibutyldithiocarbamate), MZ (2- 1 type or 2 types or more, such as a zinc salt of mercaptobenzothiazole) and TT (tetramethyl thiuram disulfide).

The addition amount of the vulcanization accelerator is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of rubber in the rubber latex.
Examples of the vulcanization acceleration aid include one or two kinds such as zinc white (zinc oxide) and stearic acid. The addition amount of the vulcanization acceleration aid is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of rubber in the rubber latex.

In general, non-fouling phenols are preferably used as the antioxidant, but amines may also be used. The addition amount of the anti-aging agent is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of rubber in the rubber latex.
Examples of the filler include one or more of kaolin clay, hard clay, calcium carbonate, and the like. The addition amount of the filler is preferably about 10 parts by mass or less per 100 parts by mass of rubber in the rubber latex.

The dispersant is added in order to satisfactorily disperse the various additives in the rubber latex, and examples of the dispersant include one or more of anionic surfactants. . The amount of the dispersant added is preferably about 0.3 parts by mass or more and 1 part by mass or less of the total amount of components to be dispersed.
In the case of a resin, an immersion liquid is prepared by adding various additives such as an antioxidant, a filler, and a dispersant to the resin emulsion.

Examples of the resin include one or more of soft resins that can be emulsified, such as vinyl chloride resins, urethane resins, and acrylic resins.
As an anti-aging agent, 1 type, or 2 or more types, such as non-fouling phenols and amines which were illustrated previously, are mentioned. The addition amount of the anti-aging agent is preferably about 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the solid content (resin content) in the resin emulsion.

Examples of the filler include one or more of the exemplified fillers. The amount of the filler added is preferably about 10 parts by mass or less per 100 parts by mass of the resin content in the resin emulsion.
As a dispersing agent, 1 type, or 2 or more types, such as the anionic surfactant of the said illustration, are mentioned. The amount of the dispersant added is preferably about 0.3 parts by mass or more and 1 part by mass or less of the total amount of components to be dispersed.

Next, in the film forming process 3, by heating the hand mold pulled up from the immersion liquid, in the case of rubber, the immersion liquid adhered to the surface of the hand mold is dried and the rubber is vulcanized to form a film. To do.
In the case of a resin, the immersion liquid adhered to the surface of the hand mold is dried and the fine particles of the resin forming the resin emulsion are melted and integrated to form a film.

Next, in the demolding step 4, the rubber gloves G are manufactured by demolding the formed film from the hand mold.
As the rubber glove G, either a single-layer rubber glove composed only of the film or a support type rubber glove in which the film is reinforced with a fibrous knitted glove can be produced.
That is, if the pretreatment step 1 to the demolding step 4 are performed in a state where the knitted gloves are attached to a hand mold, a support type rubber glove can be manufactured. If the pretreatment step 1 to the demolding step 4 are performed without attaching the knitted gloves to the hand mold, a rubber glove having a single layer structure can be manufactured.

Next, in the manufacturing method of this example, the hand mold after removing the film is subjected to in-line cleaning in the cleaning step 5 using the hand mold cleaning agent of the present invention described above.
As a specific method of in-line cleaning, the hand mold flowing on the line is sprayed by spraying the hand mold cleaning agent by jet spray or the like, or the hand mold is sequentially moved while moving on the line. Examples include a dipping method of dipping in a cleaning agent. In particular, the immersion method is preferable from the viewpoint of contact efficiency with the cleaning agent.

The liquid temperature of the hand-type cleaning agent is preferably set to 50 ° C. or higher.
By setting the liquid temperature to 50 ° C. or higher, the penetration of the detergent for hand mold into the stain and the interaction (adsorption) of the surfactant as the main component with respect to the stain were promoted and adhered to the hand mold. Dirt can be efficiently removed in a shorter time.
However, when the liquid temperature of the cleaning agent for hand molds is too high, the hand mold gradually accumulates heat while washing is performed, which may affect the immersion liquid in the immersion step 2, for example. Therefore, it is preferable to set the liquid temperature of the hand-type cleaning agent to 70 ° C. or lower.

Further, considering the balance of these effects, the liquid temperature of the hand-type cleaning agent is preferably 55 ° C. or higher, and preferably 65 ° C. or lower, even within the above range.
The hand mold that has been cleaned with the hand mold cleaning agent is further washed with water and sufficiently dried, and then sent again to the pretreatment step 1 to be used in the next manufacturing process.
In the cleaning step 5, other conventionally known cleaning methods may be combined with the cleaning using the hand-type cleaning agent. Examples of the other cleaning methods include ultrasonic cleaning and brushing.

Moreover, you may implement the washing | cleaning using another washing | cleaning agent in the time of the any one or both before and after washing | cleaning by the said hand-type cleaning agent. Examples of the other cleaning agents include commercially available cleaning agents generally used for mold cleaning applications, acidic aqueous solutions such as hydrochloric acid and sulfuric acid, alkaline aqueous solutions such as sodium hydroxide and potassium hydroxide, and hot water. Can be mentioned.
As described above, according to the detergent for hand molds of the present invention, dirt attached to the hand mold can be efficiently removed in a short time by the action of the surfactant having a polyoxyethylene group in the molecule. For this reason, as described above, the hand mold flowing on the line is cleaned in-line at each manufacturing time as described above. This can be prevented more reliably than before.

Accordingly, it is possible to manufacture a high-quality rubber glove free from the above-mentioned defects with high productivity while suppressing the occurrence rate of defects such as variations in the thickness of the coating film and perforations due to the adhesion of dirt.
In addition, the number of times that time-consuming offline cleaning is performed can be reduced as much as possible. If the off-line cleaning is performed using the hand-type cleaning agent of the present invention, the off-line cleaning time can be shortened. Therefore, the productivity of rubber gloves can be further improved.

<Example 1>
As a surfactant having a polyoxyethylene group in the molecule, polyoxyethylene polyoxypropylene glycol [POEPROPG, Emulgen (registered trademark) PP-290 manufactured by Kao Corporation] was used.
The said polyoxyethylene polyoxypropylene glycol, potassium hydroxide, and methanol were added to water, and it stirred and prepared the detergent for hand molds. The amount of each component was as shown in Table 1 below.

<Example 2>
The same procedure as in Example 1 was performed except that the same amount of polyoxyethylene alkyl ether [POERE, Emulgen 1150S-60 manufactured by Kao Corporation] was used as the surfactant having a polyoxyethylene group in the molecule. A mold cleaner was prepared.
<Example 3>
Example 1 except that the same amount of polyoxyethylene lauryl ether sulfate [POELES, Emar (registered trademark) 20C manufactured by Kao Corporation] was used as a surfactant having a polyoxyethylene group in the molecule. Similarly, a hand-type cleaning agent was prepared.

<Example 4>
A hand cleaner was prepared in the same manner as in Example 1 except that potassium hydroxide was not added and the amount of water was increased accordingly.
<Example 5>
A hand cleaner was prepared in the same manner as in Example 1 except that methanol was not added and the amount of water was increased accordingly.

<Example 6>
A hand washing agent was prepared in the same manner as in Example 1 except that potassium hydroxide and methanol were not blended and the amount of water was increased accordingly.
<Comparative example 1>
In place of the surfactant having a polyoxyethylene group in the molecule, the same amount of linear alkylbenzene sulfonate [RBS, Neopelex (registered trademark) No. 6F powder] was used in the same manner as in Example 1 to prepare a hand-type cleaning agent.

<Comparative example 2>
Instead of the surfactant having a polyoxyethylene group in the molecule, the same amount of sodium lauryl sulfate [LS, Emar 10G manufactured by Kao Corporation] was used as in Example 1 for hand molds. A cleaning agent was prepared.
<Comparative Example 3>
Water and hydrochloric acid were blended at a mass ratio of 80:20 to prepare a hand-type cleaning agent.

<Comparative example 4>
Water and potassium hydroxide were blended at a mass ratio of 80:20 to prepare a hand-type cleaning agent.
<Comparative Example 5>
Water and methanol were blended at a mass ratio of 80:20 to prepare a hand-type cleaning agent.
<Preparation of immersion liquid>
1 part by weight of sulfur (vulcanizing agent) and 1 part by weight of vulcanization accelerator per 100 parts by weight of solids (rubber part) in the natural rubber latex in natural rubber latex (solid content 60%, high ammonia latex) After adding BZ (zinc dibutyldithiocarbamate), 1 part by weight of zinc white (vulcanization accelerating aid), and an appropriate amount of anti-aging agent (butylated product of p-cresol and dichloropentadiene), a temperature of 24 to 30 ° C. An immersion liquid was prepared by vulcanization for 48 hours.

<Manufacture of hand molds>
Rubber gloves were produced for 5 consecutive days using a continuous dipping rubber glove production line with 1000 hand molds on the left and right on one line.
The hand mold was made of earthenware pottery. Before using the hand mold for manufacturing rubber gloves, 97% sulfuric acid, 40% sodium hydroxide aqueous solution, and warm water are thoroughly washed in order in order, and offline washing is performed once during the production of rubber gloves. We decided not to implement.

The manufacturing process is as shown in FIG. 1. In the pretreatment process 1, a calcium nitrate aqueous solution was used as a coagulant solution. In the dipping process 2, the previously prepared natural rubber dipping solution was used.
In the cleaning step 5, a dipping method was adopted, and the hand mold was immersed and cleaned in a state where the liquid temperature of the detergent for hand mold prepared in each of the above Examples and Comparative Examples was set to 55 ° C. Then, after further washing with water, it was sufficiently dried and sent to the pretreatment step 1.

Moreover, as Example 7, it verified also when the liquid temperature of the cleaning agent for hand molds same as Example 1 was set to 40 degreeC.
<Evaluation of cleaning effect>
A drop of pure water was dropped on the surface of the hand mold immediately after removing the film, and the contact angle was measured.
It can be evaluated that the larger the contact angle, the higher the hydrophobicity of the hand-shaped surface, that is, the larger the amount of hydrophobic dirt, the smaller the contact angle.

The measurement of contact nuclei was carried out 1 day, 2 days, 3 days, 4 days and 5 days after the production of rubber gloves.
The results are shown in Tables 2 and 3.

From the results of Examples 1 to 7 and Comparative Examples 1 to 5 in Table 2 and Table 3, it was attached to the hand mold by using a detergent for hand mold containing a surfactant having a polyoxyethylene group in the molecule. It has been found that it is possible to effectively remove the stained dirt.
From the results of Examples 1 to 7, polyoxyethylene polyoxypropylene glycol is preferable as the surfactant in terms of the effect of removing dirt, and the hand-type cleaning agent is an alkali compound and / or lower It has been found that it preferably contains alcohols, particularly preferably contains both alkali compounds and lower alcohols, and the liquid temperature of the hand-type cleaning agent is preferably 50 ° C. or higher. .

G Rubber gloves 1 Pretreatment process 2 Dipping process 3 Film forming process 4 Demolding process 5 Cleaning process

Claims (5)

  A hand-type cleaning agent comprising at least one selected from the group of surfactants having a polyoxyethylene group in the molecule.   The hand-type cleaning agent according to claim 1, which also contains an alkali compound.   The hand washing | cleaning agent of Claim 1 or 2 which also contains lower alcohols. Rubber gloves with a film made of elastomer such as rubber
(1) a pretreatment step in which a hand mold corresponding to the three-dimensional shape of the rubber glove is dipped in a coagulant solution, pulled up and dried;
(2) a dipping process in which the hand mold is dipped in a dipping solution containing an elastomer that is the basis of the film and then pulled up;
(3) a film forming step for forming the film by heating the hand mold; and
(4) Demolding step of demolding the film from the hand mold,
A manufacturing method in which a plurality of hand dies are continuously circulated in order between each of the steps, and the hand dies after demolding the film in the demolding step are washed and dried. The rubber | gum characterized by including the washing | cleaning process sent to the said pre-treatment process after that, and washing | cleaning a hand type | mold using the detergent for hand molds of any one of the said Claim 1 thru | or 3 in the said washing | cleaning process. Glove manufacturing method.   The method for manufacturing a rubber glove according to claim 4, wherein in the cleaning step, the temperature of the detergent for hand molds is set to 50 ° C or higher and 70 ° C or lower and used for hand mold cleaning.

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