JPS6335421B2 - - Google Patents
Info
- Publication number
- JPS6335421B2 JPS6335421B2 JP59281564A JP28156484A JPS6335421B2 JP S6335421 B2 JPS6335421 B2 JP S6335421B2 JP 59281564 A JP59281564 A JP 59281564A JP 28156484 A JP28156484 A JP 28156484A JP S6335421 B2 JPS6335421 B2 JP S6335421B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- softener
- parts
- strength
- rubber latex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920001971 elastomer Polymers 0.000 claims description 29
- 239000005060 rubber Substances 0.000 claims description 29
- 229920000126 latex Polymers 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000004816 latex Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 239000004902 Softening Agent Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 229920001195 polyisoprene Polymers 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 235000019483 Peanut oil Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000010692 aromatic oil Substances 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002385 cottonseed oil Substances 0.000 description 1
- 235000012343 cottonseed oil Nutrition 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010685 fatty oil Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229920003008 liquid latex Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920006173 natural rubber latex Polymers 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011297 pine tar Substances 0.000 description 1
- 229940068124 pine tar Drugs 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- HUMLQUKVJARKRN-UHFFFAOYSA-M sodium;n,n-dibutylcarbamodithioate Chemical compound [Na+].CCCCN(C([S-])=S)CCCC HUMLQUKVJARKRN-UHFFFAOYSA-M 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- -1 sub Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- KMNUDJAXRXUZQS-UHFFFAOYSA-L zinc;n-ethyl-n-phenylcarbamodithioate Chemical compound [Zn+2].CCN(C([S-])=S)C1=CC=CC=C1.CCN(C([S-])=S)C1=CC=CC=C1 KMNUDJAXRXUZQS-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Moulding By Coating Moulds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Laminated Bodies (AREA)
Description
〔産業上の利用分野〕
本発明は、強度並びに柔軟性に優れた膜状のゴ
ム製品を製造する方法に関する。特に本発明は、
手袋、バルーンカテーテル、風船、乳首などの比
較的肉薄の製品を製造するのに適した方法に関す
るものである。
〔従来の技術〕
ゴム手袋は外科手術、電気工事あるいは家庭な
ど種々の分野において使用されているが、特に外
科手術においては、手指の感覚をできるだけ妨げ
ないように、薄くて柔軟な手袋が不可欠である。
ゴム手袋を製造する場合、手型をゴムラテツクス
溶液に浸漬して型表面にゴムラテツクスを付着せ
しめた後、乾燥・加硫する操作を１回または複数
回繰り返してゴム膜の型に表面に生成させ、これ
を剥離して手袋を得る。
ところでゴムの柔軟性は、加硫剤、加硫促進剤
などの使用割合や処理温度、時間などの加硫条件
を変化させることによつてある程度調節可能であ
るが、外科手術用として満足し得る程度の柔軟性
を得ることは難しい。そこで従来は、柔軟性を改
良するために軟化剤を添加していた。
〔発明が解決しようとする問題点〕
しかしながら、軟化剤を添加すると強度が低下
して、例えば手術用手袋のJIS規格強度を満足し
ないものとなる。すなわち、柔軟性が満足できる
ものは強度の点で不満足であり、強度が満足でき
るものは柔軟性に劣るという問題があり、柔軟性
と強度の両方を満足するものは得られていないの
が現状であつた。
本発明の目的は、柔軟性に優れ且つ強度の点で
も満足し得る膜状ゴム製品を製造する方法を提供
することにある。
〔問題点を解決するための手段〕
本発明者らは、上述の目的を達成すべく種々の
検討を行つた結果、型をゴムラテツクス液に浸漬
する際に、比較的多量の軟化剤を含有するゴムラ
テツクス液と軟化剤の含有量が少ないかあるいは
全く含有しないゴムラテツクス液のそれぞれに１
回以上浸漬することによつて、柔軟性に優れ強度
も大きな製品を得ることができることを見出し、
本発明に到達した。
すなわち本発明は、ゴムラテツクス液に型を浸
漬して型表面にゴムラテツクスを付着せしめた
後、乾燥・加硫して膜状のゴム製品を製造するに
あたり、ラテツクス中のゴム成分100重量部に対
して少なくとも２重量部の軟化剤を含有する第１
のゴムラテツクス液と、軟化剤を含有しないかあ
るいは軟化剤の含有量が前記第１のゴムラテツク
ス液よりも２重量部以上低い第２のゴムラテツク
ス液とにそれぞれ１回以上浸漬することを特徴と
する膜状ゴム製品の製造方法である。
本発明においては、第１のゴムラテツクス液中
の軟化剤の含有量はゴム成分100重量部に対して
２重量部以上である。軟化剤がこれよりも少ない
と柔軟性が不十分になる。含有量の上限について
は特に限定はないが、製品の表面にこの層が露出
する場合には、50重量部を超えると柔らかすぎて
実用上問題を生じるようになるので、この場合に
はその両側から軟化剤の使用量の少ない層で挟む
ようにするとよい。また、第２のゴムラテツクス
液の軟化剤の含有量は、第１のゴムラテツクス液
よりも２重量部以上低いことが必要であり、高強
度を要求される用途には、軟化剤を含有しないも
のを使用するのが最も好ましい。
〔作用〕
本発明において、柔軟性と強度の両方が優れた
製品が得られる理由は明確ではないが、一種の相
乗効果によるものと考えられる。
〔実施例〕
本発明は、一般に使用されている種々のゴムに
広く適用することができる。ゴムを具体的に例示
するならば、天然ゴム、ポリイソプレンゴム、ス
チレン−ブタジエンゴム、クロロプレンゴム、ア
クリルゴムなどをあげることができる。
また、軟化剤としては、通常使用されるものは
いずれも使用することができる。軟化剤を具体的
に例示するならば、ステアリン酸、ラウリン酸な
どの脂肪酸、綿実油、落花生油などの脂肪油、パ
インタール・ロジン、トール油、サブ、パラフイ
ン系油、芳香族油などの石油系軟化剤、パラフイ
ン、液状ゴム、低融点合成樹脂、ジブチルフタレ
ート、ジオクチルフタレート、トリクレジルフオ
スフエートなどを挙げることができる。これらの
なかでも特に好ましいのは、液状ゴム、スピンド
ル油及びパラフインである。
本発明においては、第１のゴムラテツクス液と
第２のゴムラテツクス液への浸漬はそれぞれ１回
ずつでもよいが、複数回ずつあるいは一方に１回
浸漬し他方に複数回浸漬するようにしてもよい。
本発明において使用するゴムラテツクス液に
は、軟化剤の他に加硫剤、加硫促進剤、着色剤、
分散剤、離型剤など通常使用される各種の添加剤
を配合することができ、これらの配合量は目的・
用途などに応じて適宜選択することができる。
以下具体的実施例により本発明をさらに詳細に
説明するが、例中の「部」及び「％」はすべて重
量基準である。
実施例 １
天然ゴムラテツクス（濃度60％）100部と水酸
化カリウム水溶液（濃度20％）1.72部とを均一に
混合し、一方ジブチル・ジチオカーバミン酸ナト
リウム水溶液（濃度20％）0.72部、酸化亜鉛液
（35％水分散液）1.28部、硫黄液（45％水分散液）
1.28部及びエチル・フエニル・ジチオカーバミン
酸亜鉛水溶液（濃度48％）0.72部をボールミルを
用いて混合し、さらに両者を均一に混合した。こ
の液を２等分して一方にさらに軟化剤として液状
ポリイソプレン・エマルジヨン（クラレ製LIR−
700、濃度70％）3.8部を加えて均一に混合し、何
れの液も粘度が18〜20cpsになるように水で調節
して、軟化剤を含有するラテツクス液と含有しな
いラテツクス液を調製した。
厚さ５mmのアルミ板をCa（NO3）2水溶液（濃度
２％）に浸漬し、90℃で乾燥した。次にこのアル
ミ板を上で調製した軟化剤を含有しないラテツク
ス液に15秒間浸漬してゆつくりと引き上げ、110
℃で２分間乾燥した。次いでさらに軟化剤含有ラ
テツクス液に15秒間浸漬してゆつくりと引き上
げ、110℃で30分間加硫処理を行つて、厚さ約
200μのゴム膜を得た。
得られたゴム膜について、JIS法により強伸度
を測定し、表１に示す結果を得た。
実施例 ２、３
軟化剤を5.2部（実施例２）及び8.0部（実施例
３）用いる以外は実施例１と同様にしてゴム膜を
作成し、強伸度を測定した。結果を表１に示す。
比較例 １
軟化剤添加前までの工程を実施例１と同様に
し、液を２等分することなく軟化剤3.8部を液全
量に加えて混合し、ラテツクス液を調製した。
Ca（NO3）2処理したアルミ板をこのラテツクス
液に15秒間浸漬してゆつくりと引き上げ、110℃
で２分間乾燥した後、さらに15秒間再浸漬してゆ
つくりと引き上げ、110℃で30分間加硫処理して
ゴム膜を得た。得られたゴム膜の強伸度を表１に
示す。
比較例 ２
軟化剤を5.2部用いた以外は比較例１と同様に
してゴム膜を作成し、強伸度を測定した。結果を
表１に示す。
比較例 ３
軟化剤を用いない以外は比較例１と同様にして
ゴム膜を作成し、強伸度を測定した。結果を表１
に示す。
[Industrial Application Field] The present invention relates to a method for manufacturing a membrane-like rubber product with excellent strength and flexibility. In particular, the present invention
The present invention relates to a method suitable for manufacturing relatively thin products such as gloves, balloon catheters, balloons, nipples, etc. [Prior Art] Rubber gloves are used in a variety of fields such as surgery, electrical work, and household use, but especially in surgical operations, thin and flexible gloves are essential so as not to interfere with the sensation of the hands and fingers as much as possible. be.
When manufacturing rubber gloves, a hand mold is immersed in a rubber latex solution to adhere rubber latex to the surface of the mold, and then drying and vulcanization are repeated one or more times to form a rubber film on the surface of the mold. Peel this off to obtain gloves. By the way, the flexibility of rubber can be adjusted to some extent by changing the ratio of vulcanizing agent, vulcanization accelerator, etc., and vulcanization conditions such as processing temperature and time, but it is satisfactory for use in surgical operations. It is difficult to achieve a degree of flexibility. Therefore, in the past, softeners were added to improve flexibility. [Problems to be Solved by the Invention] However, when a softener is added, the strength decreases, and the strength does not meet the JIS standard strength for, for example, surgical gloves. In other words, there is a problem that products with satisfactory flexibility are unsatisfactory in terms of strength, and products with satisfactory strength are inferior in flexibility, and the current situation is that we have not been able to obtain products that satisfy both flexibility and strength. It was hot. An object of the present invention is to provide a method for manufacturing a membrane-like rubber product that has excellent flexibility and is satisfactory in terms of strength. [Means for Solving the Problems] As a result of various studies to achieve the above-mentioned object, the inventors of the present invention have found that when a mold is immersed in a rubber latex liquid, a relatively large amount of softening agent is contained. 1 for each rubber latex liquid and rubber latex liquid containing little or no softener.
It was discovered that by dipping the product more than once, it was possible to obtain a product with excellent flexibility and strength.
We have arrived at the present invention. That is, in the present invention, when a mold is immersed in a rubber latex solution to adhere rubber latex to the surface of the mold, the rubber latex is dried and vulcanized to produce a film-like rubber product. a first containing at least 2 parts by weight of a softener;
and a second rubber latex liquid that does not contain a softener or has a softener content lower than that of the first rubber latex liquid by 2 parts by weight or more, respectively, at least once. This is a method for producing shaped rubber products. In the present invention, the content of the softener in the first rubber latex liquid is 2 parts by weight or more based on 100 parts by weight of the rubber component. If the amount of softener is less than this, the flexibility will be insufficient. There is no particular limit on the upper limit of the content, but if this layer is exposed on the surface of the product, if it exceeds 50 parts by weight, it will be too soft and cause practical problems, so in this case, it is necessary to It is best to sandwich between layers that use a small amount of softener. In addition, the content of the softener in the second rubber latex liquid must be at least 2 parts by weight lower than that in the first rubber latex liquid, and for applications that require high strength, it is necessary to use one that does not contain a softener. Most preferably used. [Effect] Although the reason why a product with both excellent flexibility and strength can be obtained in the present invention is not clear, it is thought to be due to a kind of synergistic effect. [Example] The present invention can be widely applied to various commonly used rubbers. Specific examples of rubber include natural rubber, polyisoprene rubber, styrene-butadiene rubber, chloroprene rubber, and acrylic rubber. Further, as the softening agent, any commonly used softening agent can be used. Specific examples of softeners include fatty acids such as stearic acid and lauric acid, fatty oils such as cottonseed oil and peanut oil, petroleum-based softeners such as pine tar, rosin, tall oil, sub, paraffin oils, and aromatic oils. Examples include softeners, paraffin, liquid rubber, low-melting synthetic resins, dibutyl phthalate, dioctyl phthalate, and tricresyl phosphate. Among these, particularly preferred are liquid rubber, spindle oil and paraffin. In the present invention, immersion in the first rubber latex liquid and the second rubber latex liquid may be performed once each, or multiple times, or once in one and multiple times in the other. In addition to the softening agent, the rubber latex liquid used in the present invention includes a vulcanizing agent, a vulcanization accelerator, a coloring agent,
Various commonly used additives such as dispersants and mold release agents can be added, and the amount of these added depends on the purpose and purpose.
It can be selected as appropriate depending on the purpose and the like. The present invention will be explained in more detail with reference to specific examples below, in which all "parts" and "%" are based on weight. Example 1 100 parts of natural rubber latex (concentration 60%) and 1.72 parts of potassium hydroxide aqueous solution (concentration 20%) were uniformly mixed, while 0.72 parts of dibutyl sodium dithiocarbamate aqueous solution (concentration 20%) and zinc oxide solution ( 35% water dispersion) 1.28 parts, sulfur liquid (45% water dispersion)
1.28 parts and 0.72 parts of an aqueous solution of zinc ethyl phenyl dithiocarbamate (concentration 48%) were mixed using a ball mill, and the two were further mixed uniformly. Divide this liquid into two equal parts and add liquid polyisoprene emulsion (LIR- manufactured by Kuraray) to one side as a softening agent.
700, concentration 70%) was added and mixed uniformly, and the viscosity of both liquids was adjusted with water to 18 to 20 cps to prepare latex liquids containing and without softeners. . An aluminum plate with a thickness of 5 mm was immersed in a Ca(NO 3 ) 2 aqueous solution (concentration 2%) and dried at 90°C. Next, this aluminum plate was immersed in the latex solution prepared above that did not contain a softener for 15 seconds and slowly pulled up.
Dry for 2 minutes at °C. Next, it was further immersed in a latex solution containing a softener for 15 seconds, slowly pulled up, and vulcanized at 110°C for 30 minutes to a thickness of approx.
A 200μ rubber film was obtained. The strength and elongation of the obtained rubber film was measured according to the JIS method, and the results shown in Table 1 were obtained. Examples 2 and 3 Rubber films were prepared in the same manner as in Example 1, except that 5.2 parts (Example 2) and 8.0 parts (Example 3) of the softener were used, and the strength and elongation were measured. The results are shown in Table 1. Comparative Example 1 The steps up to the addition of the softener were the same as in Example 1, and 3.8 parts of the softener was added to the total amount of the solution and mixed without dividing the solution into two to prepare a latex solution. An aluminum plate treated with Ca(NO 3 ) 2 was immersed in this latex solution for 15 seconds, slowly pulled up, and heated to 110°C.
After drying for 2 minutes, it was immersed again for an additional 15 seconds, slowly pulled up, and vulcanized at 110°C for 30 minutes to obtain a rubber film. Table 1 shows the strength and elongation of the obtained rubber membrane. Comparative Example 2 A rubber film was prepared in the same manner as Comparative Example 1 except that 5.2 parts of the softener was used, and the strength and elongation were measured. The results are shown in Table 1. Comparative Example 3 A rubber film was prepared in the same manner as Comparative Example 1 except that no softener was used, and the strength and elongation were measured. Table 1 shows the results.
Shown below.
【表】
表１から明らかなように、軟化剤を使用しない
比較例３の場合には、破断強度が412Kg／cm2であ
るのに対し、軟化剤を使用した比較例１、２にお
いてはそれぞれ243Kg／cm2及び171Kg／cm2と、軟化
剤の使用量が増加するに従つて大幅な強度低下が
見られる。これに対して実施例においては、軟化
剤を使用しても破断強度の低下はわずかである。
一方、柔軟性の１つの指標として80％引張応力
（値が低いほど柔軟である）を実施例と比較例に
ついて比較すると、同量の軟化剤を使用した場合
には明らかに実施例の方が低い値を示しており、
柔軟性に優れていることがわかる。
実施例 ４〜６
軟化剤としてスピンドル油を用いる以外は実施
例１と同様にしてゴム膜を作成し、強伸度特性の
測定を行つた。結果を表２に示す。
比較例 ４〜６
軟化剤としてスピンドル油を用いる以外は比較
例１と同様にしてゴム膜を作成し、強伸度特性の
測定を行つた。結果を表２に示す。[Table] As is clear from Table 1, in the case of Comparative Example 3, which does not use a softener, the breaking strength is 412 Kg/ cm2 , while in Comparative Examples 1 and 2, which use a softener, each 243Kg/cm 2 and 171Kg/cm 2 , which shows a significant decrease in strength as the amount of softener used increases. On the other hand, in the examples, even when a softener is used, the breaking strength decreases only slightly. On the other hand, when comparing the 80% tensile stress (the lower the value, the more flexible) as an index of flexibility, it is clear that the example is better when the same amount of softener is used. It shows a low value,
It can be seen that it has excellent flexibility. Examples 4 to 6 Rubber films were prepared in the same manner as in Example 1 except that spindle oil was used as a softener, and the strength and elongation characteristics were measured. The results are shown in Table 2. Comparative Examples 4 to 6 Rubber films were prepared in the same manner as in Comparative Example 1 except that spindle oil was used as a softener, and the strength and elongation characteristics were measured. The results are shown in Table 2.
本発明によれば、従来とほぼ同量の軟化剤を使
用するにもかかわらず高強度の製品が得られ、柔
軟性は従来の軟化剤を使用したものよりもさらに
優れたものとなるという驚くべき効果が得られ
る。また、軟化剤を多量に使用しても強度低下は
わずかであるので、従来は製造できなかつた極め
て柔軟性に優れた製品を得ることも可能である。
したがつて、本発明は比較的内薄の製品に顕著
な効果を発揮し、外科手術用ゴム手袋、バルーン
カテーテル、コンドーム、乳首などの各種医療用
または衛生用ゴム製品を始め、電気工事用ゴム手
袋、家庭用ゴム手袋、指サツクなどに好適であ
る。
According to the present invention, a product with high strength can be obtained despite using approximately the same amount of softener as before, and the flexibility is even better than that using conventional softeners. The desired effect can be obtained. Furthermore, even if a large amount of softener is used, there is only a slight decrease in strength, so it is possible to obtain products with extremely excellent flexibility, which has not been possible in the past. Therefore, the present invention exhibits a remarkable effect on products with a relatively thin inner layer, and is suitable for various medical and sanitary rubber products such as surgical gloves, balloon catheters, condoms, and nipples, as well as rubber for electrical work. Suitable for gloves, household rubber gloves, finger pads, etc.
Claims (1)
ムラテツクスを付着せしめた後、乾燥・加硫して
膜状のゴム製品を製造するにあたり、ラテツクス
中のゴム成分100重量部に対して少なくとも２重
量部の軟化剤を含有する第１のゴムラテツクス液
と、軟化剤を含有しないかあるいは軟化剤の含有
量が前記第１のゴムラテツクス液よりも２重量部
以上低い第２のゴムラテツクス液とにそれぞれ１
回以上浸漬することを特徴とする膜状ゴム製品の
製造方法。1. At least 2 parts by weight per 100 parts by weight of the rubber component in the latex when manufacturing a film-like rubber product by immersing a mold in a rubber latex liquid to adhere rubber latex to the mold surface, drying and vulcanizing it. and a second rubber latex liquid that does not contain a softener or has a softener content lower than that of the first rubber latex liquid by at least 2 parts by weight, respectively.
A method for producing a film-like rubber product, which comprises dipping the product more than once.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28156484A JPS61152449A (en) | 1984-12-26 | 1984-12-26 | Rubber product and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28156484A JPS61152449A (en) | 1984-12-26 | 1984-12-26 | Rubber product and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61152449A JPS61152449A (en) | 1986-07-11 |
| JPS6335421B2 true JPS6335421B2 (en) | 1988-07-14 |
Family
ID=17640941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28156484A Granted JPS61152449A (en) | 1984-12-26 | 1984-12-26 | Rubber product and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61152449A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5483697A (en) * | 1989-05-22 | 1996-01-16 | Board Of Regents The University Of Texas | Multilayer protective coverings with a sealing solution |
| US5459879A (en) * | 1989-05-22 | 1995-10-24 | Board Of Regents, The University Of Texas System | Protective coverings |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341383A (en) * | 1976-08-05 | 1978-04-14 | Atlantic Richfield Co | Method for combination of polyurethanee elastomer composition with rubbery substance |
| JPS5743420A (en) * | 1980-08-29 | 1982-03-11 | Hitachi Ltd | Mask alignment method |
-
1984
- 1984-12-26 JP JP28156484A patent/JPS61152449A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341383A (en) * | 1976-08-05 | 1978-04-14 | Atlantic Richfield Co | Method for combination of polyurethanee elastomer composition with rubbery substance |
| JPS5743420A (en) * | 1980-08-29 | 1982-03-11 | Hitachi Ltd | Mask alignment method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61152449A (en) | 1986-07-11 |
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