JP2005126488A - Method for producing low allergic natural rubber product - Google Patents

Method for producing low allergic natural rubber product Download PDF

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JP2005126488A
JP2005126488A JP2003360972A JP2003360972A JP2005126488A JP 2005126488 A JP2005126488 A JP 2005126488A JP 2003360972 A JP2003360972 A JP 2003360972A JP 2003360972 A JP2003360972 A JP 2003360972A JP 2005126488 A JP2005126488 A JP 2005126488A
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natural rubber
rubber product
water vapor
product
latex
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Naoya Ichikawa
直哉 市川
Taro Itagaki
太郎 板垣
Haruyoshi Minamiguchi
治義 南口
Jun Nishibayashi
純 西林
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Sumitomo Rubber Industries Ltd
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Sumitomo Rubber Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a low allergic natural rubber product, by which the mass of elution proteins in a natural rubber product can efficiently be reduced by a simple treatment. <P>SOLUTION: This method for producing the low allergic natural rubber product is characterized by bringing a natural rubber product dipped in a natural rubber latex into contact with ≥200°C steam. The steam is preferably heated saturated steam. Thereby, the mass of proteins eluted from the natural rubber product and the content of allergen proteins in the natural rubber product can be reduced to realize the low allergization of the natural rubber product. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、アレルギー性が低減された天然ゴム製品を製造する方法に関する。   The present invention relates to a method for producing a natural rubber product with reduced allergenicity.

天然ゴムは、ゴム分のほかに水、蛋白質、無機塩類等を含む天然ゴムラテックスとして得られるものであって、伸びが大きい、弾性が高い、皮膜の強さが良好である等の特徴を有することから、従来、自動車用タイヤ、ベルト、粘着剤、接着剤等の工業用品だけでなく、手袋等の家庭用品、手術用手袋や各種カテーテル等の医療用具、授乳用具、避妊具等に至る幅広い分野で利用されている。   Natural rubber is obtained as natural rubber latex containing water, protein, inorganic salts, etc. in addition to rubber, and has characteristics such as high elongation, high elasticity, and good film strength. Therefore, in the past, not only industrial products such as automobile tires, belts, adhesives, adhesives, but also household items such as gloves, medical tools such as surgical gloves and various catheters, nursing tools, contraceptives, etc. Used in the field.

ところが近年、天然ゴム製の手袋やカテーテル等を使用すると、天然ゴムに含まれる蛋白質が原因(抗原)となって、呼吸困難やアナフィラキシー様症状(血管性浮腫、じんましん、チアノーゼ等)等の即時型(I型)アレルギーを引き起こすおそれがあると指摘されている。そこで、天然ゴムラテックスに蛋白分解酵素を加えて蛋白質を分解した後、遠心分離等によってラテックスを洗浄する、いわゆる脱蛋白処理を施すことによって、天然ゴムに含まれる蛋白質を除去することが試みられている。   However, in recent years, when natural rubber gloves or catheters are used, the protein contained in the natural rubber causes (antigen) and immediate type such as dyspnea and anaphylactoid symptoms (angioedema, urticaria, cyanosis, etc.) (Type I) It has been pointed out that it may cause allergies. Therefore, an attempt has been made to remove proteins contained in natural rubber by subjecting natural rubber latex to protein degradation by adding a proteolytic enzyme and then washing the latex by centrifugation or the like, so-called deproteinization treatment. Yes.

しかしながら、脱蛋白処理によればアレルギー性の低減された天然ゴムを得ることができるものの、酵素処理や遠心分離処理等を経ることによる生産性の低下や歩留まりの低下といった問題があり、生産コスト上の不利がある。
一方、脱蛋白天然ゴムラテックスの歩留まりや生産性の低下に大きな影響を与える酵素処理と遠心分離処理とを避けるべく、手袋、カテーテル、避妊具等の浸漬製品を製造する際には、製品を温水に浸漬する、いわゆるリーチング処理を施すことによって溶出蛋白質量を減少する方法が提案されている。しかしながら、この方法には、ゴム製品のアレルギー性を低減する程度が低いという問題や、長時間の浸漬処理が必要であることから多量の温水や熱量が必要になるという問題がある。
However, although the deproteinization treatment can obtain natural rubber with reduced allergenicity, there are problems such as a decrease in productivity and a decrease in yield due to an enzyme treatment, a centrifugal separation treatment, etc. There are disadvantages.
On the other hand, when manufacturing immersion products such as gloves, catheters, and contraceptives to avoid enzyme treatment and centrifugation, which have a large impact on the yield and productivity of deproteinized natural rubber latex, There has been proposed a method for reducing the amount of eluted protein by so-called leaching treatment. However, this method has a problem that the degree of reducing the allergenicity of the rubber product is low, and a problem that a large amount of hot water and heat are required because a long immersion treatment is required.

また、特許文献1には、蛋白分解酵素液に浸漬して蛋白質を分解させた天然ゴムラテックスを用いてゴム製品を成形し、これを加硫した後、温水や希アルカリ水に浸漬して分解蛋白質を抽出する方法が提案されており、特許文献2には、天然ゴムラテックスを用いて成形されたゴム製品を、未加硫状態で水に膨潤させ、蛋白分解酵素水溶液に浸漬して蛋白質を分解しながら抽出した後、これを加硫する脱蛋白天然ゴム製品の製造方法が提案されている。しかしながら、これらの方法では、蛋白質の分解の程度が低く、天然ゴム製品のアレルギー性を低下させる効果が十分ではない。   In Patent Document 1, a rubber product is molded using natural rubber latex that has been immersed in a proteolytic enzyme solution to decompose the protein, vulcanized, and then immersed in warm water or dilute alkaline water for decomposition. A method for extracting protein has been proposed, and Patent Document 2 discloses that a rubber product molded using natural rubber latex is swollen in water in an unvulcanized state and immersed in an aqueous solution of proteolytic enzyme to obtain the protein. There has been proposed a method for producing a deproteinized natural rubber product that is extracted while being decomposed and then vulcanized. However, in these methods, the degree of protein degradation is low and the effect of reducing the allergenicity of natural rubber products is not sufficient.

さらに、特許文献3には、水溶性であるアレルギー蛋白を二酸化炭素臨界超過条件下で抽出除去する方法が記載されているが、二酸化炭素の超臨界流体を得るには特殊な設備が必要であって、生産性や生産コスト上、好ましい方法ではない。
特開平9−71604号公報(段落〔0006〕,段落〔0011〕〜〔0014〕) 特開平9−67402号公報(段落〔0006〕,段落〔0010〕〜〔0013〕) 特開2002−69102号公報(段落〔0004〕)
Furthermore, Patent Document 3 describes a method for extracting and removing water-soluble allergic proteins under supercritical conditions of carbon dioxide, but special equipment is required to obtain a supercritical fluid of carbon dioxide. Therefore, it is not a preferable method in terms of productivity and production cost.
JP-A-9-71604 (paragraph [0006], paragraphs [0011] to [0014]) JP-A-9-67402 (paragraph [0006], paragraphs [0010] to [0013]) JP 2002-69102 A (paragraph [0004])

そこで本発明の目的は、簡易な処理によって、天然ゴム製品の溶出蛋白質量を効率よく低減させることのできる低アレルギー性天然ゴムの製造方法を提供することである。   Accordingly, an object of the present invention is to provide a method for producing a hypoallergenic natural rubber that can efficiently reduce the amount of protein eluted from a natural rubber product by a simple treatment.

上記目的を達成するための本発明に係る低アレルギー性天然ゴム製品の製造方法は、天然ゴムラテックスを用いてなる浸漬製品を200℃以上の水蒸気に接触させて、溶出蛋白質量を減少させることを特徴とする。
本発明に係る低アレルギー性天然ゴム製品の製造方法によれば、天然ゴムラテックスを原料として直接に、浸漬法によって成形・加工された天然ゴム製品に対して、これを200℃以上の水蒸気と直接に接触させるという処理を施すことによって、後述する実施例の記載より明らかなように、天然ゴム製品から溶出する蛋白質量と天然ゴム製品のアレルゲン蛋白の含有量とを低減させることができ、天然ゴム製品の低アレルギー化を実現することができる。
In order to achieve the above object, a method for producing a hypoallergenic natural rubber product according to the present invention comprises contacting an immersion product made of natural rubber latex with water vapor at 200 ° C. or more to reduce the amount of eluted protein. Features.
According to the method for producing a hypoallergenic natural rubber product according to the present invention, a natural rubber latex is directly used as a raw material, and the natural rubber product molded and processed by a dipping method is directly applied with steam at 200 ° C. or higher. As is apparent from the description of the examples described later, the amount of protein eluted from the natural rubber product and the content of allergen protein in the natural rubber product can be reduced. The product can be allergenic.

従って、本発明に係る低アレルギー性天然ゴム製品の製造方法は、手袋、各種カテーテル、避妊具といった、人体と直接に接触する天然ゴムの浸漬製品に対するアレルギー対策上有用である。しかも、かかる処理によれば、数十秒から数分という短い時間で十分な効果を得ることができることから、本発明の方法は、天然ゴム製品の生産性の観点からも好適である。   Therefore, the method for producing a hypoallergenic natural rubber product according to the present invention is useful for allergy countermeasures for natural rubber soaked products that come into direct contact with the human body, such as gloves, various catheters, and contraceptives. Moreover, according to such treatment, a sufficient effect can be obtained in a short time of several tens of seconds to several minutes, and therefore the method of the present invention is suitable from the viewpoint of the productivity of natural rubber products.

本発明の製造方法の適用対象である天然ゴム製品は、前述のように、天然ゴムラテックスを原料として直接に、浸漬法によって成形・加工してなるものであるが、この天然ゴムラテックスについては特段限定されるものではなく、天然のゴムの木から得られた新鮮なフィールドラテックスや、市販のアンモニア処理ラテックスのいずれをも採用することができる。また、従来公知の方法に従って酵素等による蛋白質の分解処理(蛋白質分解処理)を施した天然ゴムラテックスや、従来公知の方法に従って当該分解処理と遠心分離等による洗浄処理と(脱蛋白処理)を施した天然ゴムラテックス(いわゆる脱蛋白天然ゴムラテックス)であってもよい。   As described above, the natural rubber product to which the production method of the present invention is applied is formed and processed directly by a dipping method using natural rubber latex as a raw material. Without limitation, any of fresh field latex obtained from natural rubber tree and commercially available ammonia-treated latex can be employed. In addition, natural rubber latex that has been subjected to protein degradation treatment (proteolysis treatment) by an enzyme or the like according to a conventionally known method, or washing treatment (deproteinization treatment) by the degradation treatment and centrifugation or the like according to a conventionally known method. Natural rubber latex (so-called deproteinized natural rubber latex) may be used.

フィールドラテックスやアンモニア処理ラテックスを用いてなる浸漬製品に、前述の水蒸気による処理を施した場合には、その溶出蛋白質量を、従来公知の方法により処理された脱蛋白天然ゴムラテックスを用いてなる浸漬製品と同じ程度にまで、大幅に低減させることができる。しかも、そのアレルゲン蛋白質の含有量を、フィールドラテックスやアンモニア処理ラテックスを用いてなる浸漬製品に比べて、大幅に低減させることができる。   When an immersion product made of field latex or ammonia-treated latex is treated with water vapor as described above, the amount of the eluted protein is soaked using deproteinized natural rubber latex treated by a conventionally known method. It can be greatly reduced to the same extent as the product. In addition, the content of the allergen protein can be greatly reduced as compared with an immersion product using field latex or ammonia-treated latex.

一方、脱蛋白天然ゴムラテックスを用いてなる浸漬製品に、前述の水蒸気による処理を施した場合には、その溶出蛋白質量を、従来公知の方法により処理された脱蛋白天然ゴムラテックスを用いてなる浸漬製品に比べて、より一層低減させることができる。
本発明に係る低アレルギー性天然ゴム製品の製造方法においては、天然ゴム製品を200℃以上の水蒸気と直接に接触させることによって、その溶出蛋白質量とアレルゲン蛋白量とを低減させる効果が得られるところ、かかる効果を十分に発揮させるためには、処理の対象となる天然ゴム製品が浸漬法によって成形された皮膜状のものであることが求められる。ゴム製品(ゴム皮膜)を成形する際の、浸漬法の具体的態様については特に限定されるものではなく、例えば直接法、感熱法、アノード凝着法等の、従来公知の種々の浸漬法を採用することができる。
On the other hand, when the above-mentioned treatment with water vapor is applied to the soaked product using the deproteinized natural rubber latex, the amount of the eluted protein is determined using the deproteinized natural rubber latex treated by a conventionally known method. This can be further reduced as compared with the immersion product.
In the method for producing a hypoallergenic natural rubber product according to the present invention, the effect of reducing the amount of eluted protein and the amount of allergen protein can be obtained by directly contacting the natural rubber product with water vapor at 200 ° C. or higher. In order to sufficiently exhibit such an effect, it is required that the natural rubber product to be treated is a film-like product formed by a dipping method. The specific aspect of the dipping method when molding a rubber product (rubber film) is not particularly limited. For example, various conventionally known dipping methods such as a direct method, a heat-sensitive method, and an anode adhesion method are used. Can be adopted.

ゴム製品を200℃以上の水蒸気に接触させる処理は、ゴム製品を浸漬成形に用いた型から取り外す前(脱型前)に行ってもよく、脱型後に行ってもよい。
また、かかる処理は、ゴム製品の加硫前に行ってもよく、加硫後に行ってもよい。
本発明に係る低アレルギー性天然ゴム製品の製造方法において、ゴム製品に接触させる水蒸気は、飽和水蒸気を加熱してなるものであるのが好ましい。飽和水蒸気を誘導加熱等によって加熱したり、飽和水蒸気を加圧したりして、昇温させたものは、酸素の含有量が極めて少ないことから、かかる水蒸気を用いて浸漬製品に処理を施すことにより、実質的に無酸素状態で天然ゴム製品と水蒸気との接触を実現することができる。従って、高温での処理を施すことに伴うゴム製品の酸化劣化を防止することができる。
The treatment for bringing the rubber product into contact with water vapor at 200 ° C. or higher may be performed before the rubber product is removed from the mold used for the dip molding (before demolding) or after the demolding.
Such treatment may be performed before vulcanization of the rubber product or after vulcanization.
In the method for producing a hypoallergenic natural rubber product according to the present invention, the water vapor contacted with the rubber product is preferably obtained by heating saturated water vapor. Since the saturated water vapor is heated by induction heating or the like, and the temperature is raised by pressurizing the saturated water vapor, since the oxygen content is extremely low, the immersion product is treated with such water vapor. The contact between the natural rubber product and water vapor can be achieved in a substantially oxygen-free state. Therefore, it is possible to prevent the oxidative deterioration of the rubber product accompanying the treatment at a high temperature.

以下、本発明の実施の形態を詳細に説明する。
本発明の適用対象となる天然ゴム製品は、前述のように、浸漬法によって成形されたゴム皮膜状のものであって、例えば直接法、感熱法、アノード凝着法等の、従来公知の種々の浸漬法によって成形されたものが対象となる。
本発明の適用対象となる天然ゴム製品についての膜厚は特に限定されるものではないが、所期の作用効果を奏する上で、天然ゴム製品の膜厚は薄いほど好ましい。一般に、浸漬法によって成形され得るゴム皮膜の厚みは0.1〜1mm程度であるが、膜厚がこの範囲にあるならば、本発明の製造方法を適用することによって所期の作用効果を得ることができる。
Hereinafter, embodiments of the present invention will be described in detail.
As described above, the natural rubber product to which the present invention is applied is in the form of a rubber film formed by a dipping method. For example, a variety of conventionally known methods such as a direct method, a thermal method, and an anode adhesion method are used. The one formed by the dipping method is the target.
The film thickness of the natural rubber product to which the present invention is applied is not particularly limited, but it is preferable that the film thickness of the natural rubber product is as small as possible in order to achieve the intended effect. In general, the thickness of the rubber film that can be molded by the dipping method is about 0.1 to 1 mm. If the film thickness is in this range, the desired effect can be obtained by applying the production method of the present invention. be able to.

直接法、感熱法、アノード凝着法等の、浸漬法による天然ゴム製品(ゴム皮膜)の製造方法、製造条件等については特に限定されるものではなく、常法に従って適宜設定すればよい。
〔水蒸気の調製方法〕
本発明の製造方法に用いられる水蒸気には、例えば、飽和水蒸気を高温に加熱してなるもの、水蒸気を加圧して昇温してなるもの等を用いればよい。
There are no particular limitations on the production method, production conditions, etc. of the natural rubber product (rubber film) by the dipping method, such as the direct method, the thermal method, and the anode adhesion method, and it may be appropriately set according to a conventional method.
[Method for preparing water vapor]
As the water vapor used in the production method of the present invention, for example, a water vapor obtained by heating saturated water vapor to a high temperature, a water vapor obtained by pressurizing water vapor, or the like may be used.

飽和水蒸気を高温に加熱してなる、酸素の含有量の少ない水蒸気は、例えば、高周波誘導加熱により発熱する金属発熱体を備える反応室内に、ボイラーから供給される常圧蒸気を通過させることによって発生させることができる。
水蒸気の温度は200℃以上であるほかは特に限定されるものではないが、天然ゴム製品の物性への影響を少なくするためにも、水蒸気は400℃以下で使用するのが好ましく、300℃以下で使用するのがより好ましい。
Steam with a low oxygen content formed by heating saturated steam to a high temperature is generated, for example, by passing atmospheric steam supplied from a boiler through a reaction chamber equipped with a metal heating element that generates heat by high-frequency induction heating. Can be made.
The temperature of the water vapor is not particularly limited except that it is 200 ° C. or higher, but in order to reduce the influence on the physical properties of the natural rubber product, the water vapor is preferably used at 400 ° C. or lower, and 300 ° C. or lower. It is more preferable to use it.

〔溶出蛋白質量〕
溶出蛋白質量は水に浸漬させたゴム皮膜1g当りの蛋白質の溶出量(μg)を示すものであって、ASTM D 5712−95「Standard Test Method for Analysis of Protein in Natural Rubber and Its Products」に規定の方法に従って測定したものである。
[Eluted protein mass]
The amount of protein eluted indicates the amount (μg) of protein eluted per gram of rubber film immersed in water, and is defined in ASTM D 5712-95 “Standard Test Method for Analysis of Protein in Natural Rubber and Its Products”. It was measured according to the method.

溶出蛋白質量の許容値は天然ゴム製品の用途等に応じて設定されるものであって、特に限定されるものではないが、一般的には、400μg/g以下であるのが好ましく、100μg/g以下であるのがより好ましい。例えば天然ゴム製品がゴム手袋である場合において、ゴム手袋からの溶出蛋白質量が上記範囲を満足するときには、蛋白質アレルギーに未感作の健常者がアレルギーを誘発するおそれを小さくすることができる。   The permissible value of the eluted protein mass is set according to the use of the natural rubber product and is not particularly limited, but generally it is preferably 400 μg / g or less, preferably 100 μg / g. More preferably, it is g or less. For example, in the case where the natural rubber product is a rubber glove, when the amount of protein eluted from the rubber glove satisfies the above range, the risk of a healthy person who has not been sensitized to protein allergy to induce allergy can be reduced.

〔配合ラテックス〕
本発明に用いられる天然ゴムラテックスには、常法に従って、加硫剤、加硫促進剤、分散安定剤、老化防止剤等を配合することができる。これらの配合剤として使用可能なものの種類や、その配合量については、浸漬法によるゴム製品の成形・加工に用いられる従来の天然ゴム(脱蛋白天然ゴム)ラテックスと同様に設定すればよい。
[Formulated latex]
In the natural rubber latex used in the present invention, a vulcanizing agent, a vulcanization accelerator, a dispersion stabilizer, an antiaging agent and the like can be blended according to a conventional method. The types of these compounding agents that can be used and the blending amounts thereof may be set in the same manner as conventional natural rubber (deproteinized natural rubber) latex used for molding and processing rubber products by the dipping method.

次に、実施例および比較例を挙げて、本発明を説明する。
〔天然ゴム製品の作製〕
(参考例1)
市販の天然ゴムラテックス〔ハイアンモニアタイプ、固形分含有量約60重量%〕のゴム分100重量部に対して、水酸化カリウム(安定剤)0.2重量部、オレイン酸カリウム(安定剤)0.1重量部、硫黄(加硫剤)1重量部、酸化亜鉛1重量部、ジブチルジチオカルバミン酸亜鉛(加硫促進剤BZ)1重量部、およびフェノール系老化防止剤1重量部を添加して、配合ラテックスを得た。
Next, an Example and a comparative example are given and this invention is demonstrated.
[Production of natural rubber products]
(Reference Example 1)
0.2 parts by weight of potassium hydroxide (stabilizer) and 0 parts of potassium oleate (stabilizer) with respect to 100 parts by weight of rubber of commercially available natural rubber latex (high ammonia type, solid content: about 60% by weight) .1 part by weight, 1 part by weight of sulfur (vulcanizing agent), 1 part by weight of zinc oxide, 1 part by weight of zinc dibutyldithiocarbamate (vulcanization accelerator BZ), and 1 part by weight of phenolic anti-aging agent, A compounded latex was obtained.

上記配合ラテックスを2日間熟成した後、浸漬法によって厚さ0.3mm程度の加硫フィルム(天然ゴム製品)を作製した。この加硫フィルムの作製では、まず、陶器製の型を70℃に加熱して硝酸カルシウム30%水溶液に浸漬した後、再度、型を70℃に加熱・乾燥した上で、これを前述の配合ラテックスに浸漬した。次いで、型表面に形成されたゴム皮膜の加硫・乾燥(加硫フィルムの作製)を100℃で30分間行い、加硫・乾燥後に脱型することによって、加硫フィルムを得た。   After the blended latex was aged for 2 days, a vulcanized film (natural rubber product) having a thickness of about 0.3 mm was prepared by an immersion method. In the production of this vulcanized film, a ceramic mold is first heated to 70 ° C. and immersed in a 30% aqueous solution of calcium nitrate, and then the mold is heated and dried again at 70 ° C. Soaked in latex. Subsequently, the rubber film formed on the mold surface was vulcanized and dried (preparation of a vulcanized film) at 100 ° C. for 30 minutes, and vulcanized and dried to obtain a vulcanized film.

(参考例2)
市販の天然ゴムラテックスに代えて、脱蛋白天然ゴムラテックス〔住友ゴム(株)製の商品名「SELATEX3821」、固形分含有量約60重量%、ケルダール法による窒素含有量(N%)0.08%〕を用いたほかは、参考例1と同様にして配合ラテックスの調製と、加硫フィルムの作製とを行った。
(Reference Example 2)
Instead of commercially available natural rubber latex, deproteinized natural rubber latex [trade name “SELATEX3821” manufactured by Sumitomo Rubber Co., Ltd., solid content: about 60% by weight, nitrogen content (N%) of 0.08 by Kjeldahl method] %] Was used in the same manner as in Reference Example 1 to prepare a compounded latex and a vulcanized film.

〔水蒸気による処理〕
(実施例1)
処理に使用する高温の水蒸気は、高周波誘導加熱により発熱する金属発熱体中に、IHボイラーから供給される常圧水蒸気を通過させることによって発生させた。高温水蒸気の温度は、高周波誘導加熱の程度を調整して、金属発熱体の温度を変化させることによって調節した。
[Treatment with water vapor]
(Example 1)
The high-temperature steam used for the treatment was generated by passing normal-pressure steam supplied from an IH boiler through a metal heating element that generates heat by high-frequency induction heating. The temperature of the high-temperature steam was adjusted by changing the temperature of the metal heating element by adjusting the degree of high-frequency induction heating.

前述の方法によって得られた200℃の水蒸気を反応室(内容量約10リットル)内に導入し、充分に加熱して反応室内の温度を上記温度に維持した。次いで、この反応室内にて、参考例1で得られた加硫フィルム(天然ゴム製品)を吊下げて、60秒間放置した。
(実施例2,比較例1)
水蒸気の温度と処理時間とをそれぞれ表1に示す値に設定したほかは、いずれも実施例1と同様にして、水蒸気による処理を行った。
Water vapor of 200 ° C. obtained by the above-described method was introduced into the reaction chamber (internal volume of about 10 liters) and sufficiently heated to maintain the temperature in the reaction chamber at the above temperature. Next, in this reaction chamber, the vulcanized film (natural rubber product) obtained in Reference Example 1 was suspended and left for 60 seconds.
(Example 2, Comparative Example 1)
The treatment with water vapor was performed in the same manner as in Example 1 except that the temperature of the water vapor and the treatment time were set to the values shown in Table 1, respectively.

(実施例3)
加硫フィルムとして参考例2で得られたものを使用し、水蒸気の温度と処理時間とをそれぞれ表1に示す値に設定したほかは、実施例1と同様にして、水蒸気による処理を行った。
(実施例4,比較例2)
水蒸気の温度と、処理時間とをそれぞれ表1に示す値に設定したほかは、いずれも実施例3と同様にして、水蒸気による処理を行った。
(Example 3)
A treatment with water vapor was performed in the same manner as in Example 1 except that the vulcanized film obtained in Reference Example 2 was used and the temperature and treatment time of water vapor were set to the values shown in Table 1, respectively. .
(Example 4, Comparative Example 2)
The treatment with water vapor was performed in the same manner as in Example 3 except that the temperature of the water vapor and the treatment time were set to the values shown in Table 1, respectively.

〔溶出蛋白質量の測定〕
上記実施例1〜4および比較例1〜2で得られた加硫ゴムフィルムについて、ASTM D5712に規定の方法に従って、フィルム1g当りの蛋白質の溶出量(μg)を測定した。溶出蛋白質量の測定結果(EP量,μg/g)を表1に示す。
なお、表1に示した「対照1」は、参考例1で得られた加硫フィルムに対して、前述の水蒸気による処理を施さずに、そのままの状態で溶出蛋白質量(EP量)を測定したものである。また、「対照2」は、参考例2で得られた加硫フィルムに対して、前述の水蒸気による処理を施さずに、そのままの状態で溶出蛋白質量(EP量)を測定したものである。
[Measurement of eluted protein mass]
For the vulcanized rubber films obtained in Examples 1 to 4 and Comparative Examples 1 and 2, the protein elution amount (μg) per gram of the film was measured according to the method prescribed in ASTM D5712. Table 1 shows the measurement results of the eluted protein mass (EP amount, μg / g).
In addition, "Control 1" shown in Table 1 was measured for the amount of eluted protein (EP amount) as it was without subjecting the vulcanized film obtained in Reference Example 1 to the treatment with water vapor. It is a thing. "Control 2" is a measurement of the amount of eluted protein (EP amount) as it is without subjecting the vulcanized film obtained in Reference Example 2 to the treatment with water vapor as described above.

Figure 2005126488
Figure 2005126488

表1に示した実施例1〜2と、比較例1および対照1との比較より明らかなように、天然ゴムラテックスを用いて成形された浸漬製品(加硫フィルム)に200℃以上の水蒸気を接触させることによって、そのアレルギー性を著しく低減させることができた。また、対照2との比較により明らかなように、かかる処理を施すことで、その溶出蛋白質量を、通常の脱蛋白処理を施した場合と同程度にまで低減させることができた。   As is clear from the comparison between Examples 1 and 2 shown in Table 1 and Comparative Example 1 and Control 1, water vapor of 200 ° C. or higher was applied to the immersion product (vulcanized film) formed using natural rubber latex. The allergenicity was able to be remarkably reduced by contacting. Further, as is apparent from comparison with Control 2, by performing such treatment, the amount of the eluted protein could be reduced to the same level as when ordinary deproteinization treatment was performed.

表1に示した実施例3〜4と、比較例2および対照2との比較より明らかなように、脱蛋白天然ゴムラテックスを用いて成形された浸漬製品(加硫フィルム)に200℃以上の水蒸気を接触させることによって、そのアレルギー性(溶出蛋白質量)をより一層低減させることができた。
本発明は、以上の記載に限定されるものではなく、特許請求の範囲に記載した事項の範囲において、種々の設計変更を施すことが可能である。
As is clear from the comparison between Examples 3 to 4 shown in Table 1 and Comparative Example 2 and Control 2, the immersion product (vulcanized film) formed using the deproteinized natural rubber latex has a temperature of 200 ° C. or higher. By contacting with water vapor, the allergenicity (eluted protein mass) could be further reduced.
The present invention is not limited to the above description, and various design changes can be made within the scope of the matters described in the claims.

Claims (2)

天然ゴムラテックスを用いてなる浸漬製品を200℃以上の水蒸気に接触させて、溶出蛋白質量を減少させることを特徴とする低アレルギー性天然ゴム製品の製造方法。   A method for producing a hypoallergenic natural rubber product, characterized in that an immersed product made of natural rubber latex is brought into contact with water vapor at 200 ° C. or higher to reduce the amount of eluted protein. 水蒸気が飽和水蒸気を加熱してなるものである請求項1記載の低アレルギー性天然ゴム製品の製造方法。   The method for producing a hypoallergenic natural rubber product according to claim 1, wherein the water vapor is obtained by heating saturated water vapor.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021091826A (en) * 2019-12-12 2021-06-17 Nok株式会社 Protein-removed natural rubber composition
WO2022099883A1 (en) * 2020-11-13 2022-05-19 中国热带农业科学院农产品加工研究所 Low-protein natural rubber and method for preparation thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021091826A (en) * 2019-12-12 2021-06-17 Nok株式会社 Protein-removed natural rubber composition
WO2022099883A1 (en) * 2020-11-13 2022-05-19 中国热带农业科学院农产品加工研究所 Low-protein natural rubber and method for preparation thereof

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