A rubber glove and a method of manufacturing and using the same

Abstract

The application discloses a rubber glove and a preparation method and application thereof. The rubber glove comprises nitrile rubber, titanium white and color-changing cation exchange resin. The mass percentage of the titanium white relative to the nitrile rubber is 2.0%-4.0%, and the mass percentage of the color-changing cation exchange resin relative to the nitrile rubber is 0.1%-0.3%. The color-changing cation exchange resin is hydrogen type, and the particle size distribution is 15 mu m<=D90<=20 mu m. The rubber glove has good mechanical properties, and can remind the wearer to replace in time through color change, thereby improving the safety in use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polymer compound composition, more particularly, to a rubber glove and a preparation method thereof. BACKGROUND

[0002] Most of the disposable rubber gloves sold on the market, including latex gloves or nitrile gloves, have a use effective period, i.e., a wearing effective period, and the wearing time is generally within one hour. As the wearing time is prolonged, the protective effect of the gloves will gradually weaken. In particular, when the chemical penetration resistance and blood penetration resistance of medical examination gloves are seriously reduced, the safety of medical staff will be endangered, and therefore the gloves need to be replaced in time before the protective effect is lost. However, the replacement time is generally calculated in a time-keeping manner, but in many cases, the wearing time is forgotten, resulting in failure to replace the gloves in time. In particular, medical workers are likely to ignore the wearing time of medical gloves under high-intensity working conditions, leading to overlong use of the gloves or even failure to find that the gloves are damaged in time.

[0003] To solve the above problems, a medical double-layer glove and a preparation method thereof are disclosed in the prior art. The glove includes an outer latex layer and an inner latex layer, and the inner latex layer contains a photochromic compound. Once the outer latex layer is damaged, the inner latex layer at the corresponding position rapidly changes color under the excitation of external light sources, significantly improving the puncture recognition rate of the glove to remind medical staff to replace the glove in time. However, the glove can only remind the wearer to replace the glove when it is damaged, and cannot solve the problem of reminding the wearer to replace the glove in time when the protective performance of the glove begins to decline. SUMMARY

[0004] The purpose of the present application is to overcome the defects and deficiencies that the existing gloves cannot remind the wearer to replace the glove in time, leading to a decline in protective performance, and to provide a rubber glove.

[0005] Another purpose of the present application is to provide a preparation method of the rubber glove.

[0006] Another purpose of the present application is to provide an application of the rubber glove in medical surgery.

[0007] The above purposes of the present application are achieved by the following technical solutions.

[0008] The present application protects a rubber glove, which includes nitrile rubber, titanium white, and color-changing cation exchange resin.

[0009] The mass percentage of the titanium white relative to the nitrile rubber is 2.0% to 4.0%, and the mass percentage of the color-changing cation exchange resin relative to the nitrile rubber is 0.1% to 0.3%.

[0010] The variable color cation exchange resin is hydrogen type variable color cation exchange resin, and the particle size distribution is 15 μm≤D90≤20 μm.

[0011] The present application adds hydrogen type variable color cation exchange resin with specific particle size distribution into rubber gloves, uses the olive green of the hydrogen type variable color cation exchange resin itself, makes the rubber gloves present green; and the sweat pH value is 4.2-7.5, wherein the moisture accounts for the vast majority (more than 99%), and the rest is solid component (mainly inorganic component sodium chloride, calcium carbonate and other salts). When the hydrogen type variable color cation exchange resin contacts with sweat, the Na + , K + , Ca 2+ , Mg 2+ , Fe 2+ and other cations in sweat exchange with H + ions in the hydrogen type variable color cation exchange resin, the Na + , K + , Ca 2+ , Mg 2+ , Fe 2+ and other cations are combined to the resin molecular skeleton, and H + ions enter into the water phase environment, at this time, because of the loss of H + in the resin skeleton functional group, the color of the indicator changes from green to red, and the rubber gloves also change from green to red accordingly, so that the invalidation time of the gloves is more accurately and intuitively judged.

[0012] In addition, the particle size distribution of the variable color cation exchange resin plays a key role, and the suitable particle size distribution is 15 μm≤D90≤20 μm, when the particle size is too small, the variable color cation exchange resin is easily wrapped by nitrile latex, which causes that the variable color cation exchange resin cannot contact with sweat and develop color; and when the particle size is too large, due to the limitation of the thickness of the conventional rubber gloves (about 70 μm), the nitrile latex composition is difficult to wrap the variable color cation exchange resin well, so that the variable color cation exchange resin falls off and causes a hole.

[0013] It should be further pointed out that: the highest use temperature of the variable color cation exchange resin is higher than the vulcanization temperature of rubber, so as to ensure that the variable color cation exchange resin is not damaged in the processing process, and the gloves have good mechanical properties; the molecular weight of the variable color cation exchange resin can be selected according to actual needs, for example, the variable color cation exchange resin with a molecular weight of 400-800 can be selected.

[0014] Preferably, the particle size distribution of the variable color cation exchange resin is 17 μm≤D90≤19 μm.

[0015] Specifically, the color-changing cation exchange resin with a suitable particle size distribution can be obtained by purchasing or grinding. For example, 45 parts of the color-changing cation exchange resin, 3 parts of a dispersant, and 52 parts of water are configured into a mixed solution, and the mixed solution is ground at a grinding speed of 800-1200 r / min and a grinding temperature of 15-40℃ for 40 min with 2 cycles of circulation. The dispersant in the grinding solution serves to improve the dispersion effect, and the addition of the dispersant can slow down the sedimentation and prolong the service time.

[0016] Preferably, the mass percentage of the titanium white with respect to the nitrile rubber is 2.5%-3.5%; more preferably, the mass percentage of the titanium white with respect to the nitrile rubber is 3%.

[0017] Specifically, the rubber glove further comprises sulfur, zinc oxide, an anti-aging agent, and an accelerator. Optionally, the mass percentage of the sulfur is 0.5%-2.5%, the mass percentage of the zinc oxide is 1.5%-4.5%, the mass percentage of the anti-aging agent is 0.2%-1.2%, and the mass percentage of the accelerator is 0.2%-1.2%, with respect to the nitrile rubber. Specifically, the accelerator is a mixture of zinc diethyldithiocarbamate and zinc butyldithiocarbamate; and the anti-aging agent is styrene phenol and / or p-phenylenediamine.

[0018] The application also protects a preparation method of the above rubber glove, comprising the following steps:

[0019] immersing the hand mold in a coagulant and drying; immersing the dried hand mold in the nitrile latex composition, drying, and then immersing the dried hand mold in the nitrile latex composition again, drying, to obtain the rubber glove;

[0020] The nitrile latex composition comprises the following components by weight fraction:

[0021] 100 parts of nitrile latex, 1.0-3.0 parts of ammonia water, 1.0-2.0 parts of sulfur, 2.0-4.0 parts of zinc oxide, 0.4-1.0 parts of an accelerator, 2.0-4.0 parts of titanium white, 0.4-1.0 parts of an anti-aging agent, 0.1-0.3 parts of a color-changing cation exchange resin, and 70-140 parts of water; the color-changing cation exchange resin is a hydrogen type color-changing cation exchange resin and has a particle size distribution of 15 μm≤D90≤20 μm.

[0022] In the specific embodiment, the solid content of the nitrile latex composition can be determined according to the existing technology and the actual forming condition of the rubber glove. Optionally, the solid content of the above nitrile latex composition is 14wt%-20wt%.

[0023] The solid content of the butyronitrile latex composition mainly affects the forming processing of the rubber glove, when the solid content is low, the rubber glove is not easy to be formed and the surface of the rubber glove is damaged, and when the solid content is high, the surface of the rubber glove is rough.

[0024] Specifically, the coagulant comprises calcium nitrate 10-15 parts, barrier coating 1-3 parts, and water 82-89 parts by weight;

[0025] The calcium content of the coagulant is 10wt%-15wt%.

[0026] In the application, the calcium stearate or magnesium stearate commonly used in the barrier coating is replaced by any one of silicone, stearic acid amide or stearate amide, so that Ca 2+ or Mg 2+ The hydrogen in the discoloration cation exchange resin is exchanged with the butyronitrile latex composition, and then the color development is affected.

[0027] The specific preparation process of the rubber glove is as follows:

[0028] S1. First, remove the impurities on the surface of the hand mold, then immerse it in the coagulant, take it out and spin dry;

[0029] S2. Immerse the hand mold dried in S1 in the butyronitrile latex composition, take it out and spin dry; then immerse the dried hand mold in the butyronitrile latex composition again, take it out and spin dry;

[0030] S3. Roll the dried rubber film, leach, dehumidify, vulcanize, chlorine wash, post-leach, dry, and the rubber glove is obtained.

[0031] Specifically, the specific operation of removing the impurities on the surface of the hand mold in S1 is: pickling, alkaline washing, washing, drying, the water washing temperature is 40-70 DEG C, and the conductivity is 500-5000 uS / cm; the acid ion concentration is 1%-5%, and the alkali ion concentration is 4%-8%.

[0032] Specifically, the temperature of dehumidification in S3 is 90-120 DEG C, and the time is 5-15 minutes; the vulcanization temperature is 90-120 DEG C, and the time is 20-40 minutes; chlorine washing, post-leaching, drying and packaging after vulcanization.

[0033] Preferably, the temperature of immersing the hand mold in the coagulant is 50-60 DEG C, and the time is 2-6 seconds.

[0034] Preferably, the temperature of immersing the hand mold in the butyronitrile latex composition is 25-34 DEG C, and the time is 2-8 seconds.

[0035] The application of the above-mentioned rubber glove in a medical operation is also within the protection scope of the present application.

[0036] Compared with the prior art, the present application has the following beneficial effects:

[0037] The present application provides a rubber glove, by adding hydrogen type color-changing cation exchange resin with specific particle size distribution into nitrile rubber, using the dark green color of the hydrogen type color-changing cation exchange resin itself, the nitrile latex composition presents green color, when contacting with sweat, Na + , K + , Ca 2+ , Mg 2+ , Fe 2+ and other cations in the sweat are combined to the resin molecular skeleton, H + ion enters into the sweat, under the action of the indicator, the color changes from green to red, and then the nitrile rubber also changes from green to red accordingly, so that the invalidation time of wearing the rubber glove is accurately and intuitively judged, and the use safety of the rubber glove is improved. Moreover, the rubber glove also has good mechanical properties. DETAILED DESCRIPTION

[0038] The present application will be further described in combination with specific embodiments, but the embodiments do not limit the present application in any form. Unless otherwise specified, the raw materials and reagents used in the embodiments of the present application are commercially available raw materials and reagents.

[0039] 1. Raw materials and reagents

[0040] Calcium nitrate, brand Calcium Salt, manufacturer Sanxi;

[0041] Barrier coating is stearic acid amide, brand 768, manufacturer EMUL;

[0042] Nitrile latex, brand KNL830, manufacturer South Korea Jinhu Petrochemical Group;

[0043] Ammonia, mass concentration 2%, commercially available, and the same kind is used in other parallel experiments;

[0044] Sulfur, commercially available, and the same kind is used in other parallel experiments;

[0045] Zinc oxide, commercially available, and the same kind is used in other parallel experiments;

[0046] The accelerator is a mixed solution composed of zinc diethyl dithiocarbamate dispersion and zinc butyl dithiocarbamate dispersion in a mass ratio of 1:1, and the same (zinc diethyl dithiocarbamate dispersion and zinc butyl dithiocarbamate dispersion are both dispersed by dispersant N, and the CAS number of dispersant N is 36290-04-7) is used in other parallel experiments.

[0047] Titanium white, commercially available, the same is used in other parallel experiments;

[0048] Antioxidant is styrene phenol, commercially available, the same is used in other parallel experiments;

[0049] Hydrogen type color-changing cation exchange resin, the brand is Rx-008, and the manufacturer is Rivi.

[0050] 2. Performance test

[0051] Tension: according to the standard method of BS EN 455-2:2009;

[0052] Palm thickness: use three feng 547-401 thickness instrument to detect the palm thickness of single layer butyl rubber glove at room temperature; palm test area: 33±5mm below the middle finger joint, 48±9mm from the hand side to the palm;

[0053] Color change time test: the specific method is to start timing from wearing gloves (the total test time is 120min), visually observe the color change midpoint, and record the glove wearing time at this time, wherein the color change of rubber gloves is from green to red, and the moment when the human eye can observe red is the color change midpoint.

[0054] (1) In the specific embodiment, the color-changing cation exchange resin can be treated according to the actual needs to obtain a suitable particle size scale, and the color-changing cation exchange resin is treated by grinding to obtain color-changing cation exchange resins with different particle size distributions, and the specific operation is as follows:

[0055] According to the weight fraction, 45 parts of color-changing cation exchange resin, 3 parts of dispersant and 52 parts of deionized water are weighed to configure a mixed solution, the grinding speed is 800-1200r / min, the grinding temperature is 15-40℃, and the dispersion time and cycle number are adjusted according to the actual needs to obtain color-changing cation exchange resins with different particle size distributions.

[0056] Color-changing cation exchange resin 1, D90=15μm;

[0057] Color-changing cation exchange resin 2, D90=20μm;

[0058] Color-changing cation exchange resin 3, D90=10μm;

[0059] Color-changing cation exchange resin 4, D90 = 25 μm;

[0060] Color-changing cation exchange resin 5, D90 = 17 μm;

[0061] Color-changing cation exchange resin 6, D90 = 19 μm.

[0062] (2) Acrylonitrile latex composition

[0063] The weight parts of each component of the acrylonitrile latex compositions 1-9 are shown in Table 1, the balance being deionized water, X being the mass percentage of titanium white relative to acrylonitrile rubber, Y being the mass percentage of color-changing cation exchange resin relative to acrylonitrile rubber, and Z being the mass percentage of sulfur relative to acrylonitrile rubber, the acrylonitrile rubber referring to dry basis acrylonitrile rubber after removal of solvent.

[0064] Table 1 Acrylonitrile latex compositions 1-9

[0065]

[0066]

[0067] The above acrylonitrile latex composition can be prepared by the following method:

[0068] The acrylonitrile latex, ammonia, sulfur, zinc oxide, accelerator, titanium white, antioxidant are put into a batching tank, mixed into an acrylonitrile latex mixture, and stirred with a 30 Hz stirring motor for 20 hours, then the color-changing cation exchange resin and deionized water are added and mixed uniformly to prepare an acrylonitrile latex composition with a solid content of 14wt%-20wt%, which is then delivered to a glue tank for use.

[0069] (3) Coagulant

[0070] Coagulant 1: calcium nitrate 15 parts, barrier coating 3 parts, the balance being deionized water, the calcium content being 15wt%;

[0071] Coagulant 2: calcium nitrate 10 parts, barrier coating 1 part, the balance being deionized water, the calcium content being 10wt%.

[0072] (4) Rubber glove

[0073] The above rubber glove is prepared by the following method:

[0074] S1. First remove impurities on the surface of the hand mold, then immerse it in the coagulant, take it out and spin dry;

[0075] S2. Immerse the hand mold dried in S1 in the acrylonitrile latex composition, take it out and spin dry; then immerse the dried hand mold in the acrylonitrile latex composition again, take it out and spin dry;

[0076] S3. The dried rubber film is rolled, leached, dehumidified, vulcanized, chlorine washed, post-leached, and dried to obtain the rubber glove.

[0077] The dipping temperature in S1 is 50-60°C, and the dipping time is 2-6 seconds; the dipping temperature in S2 is 25-34°C, and the dipping time is 2-8 seconds.

[0078] The preparation methods of the rubber gloves in the examples and comparative examples are completely the same, and the difference lies in that the dipping coagulant and the nitrile latex composition are different, and the specific difference is shown in Table 2.

[0079] Table 2

[0080]

[0081] The performance test results of the rubber gloves in each example and comparative example according to the above-mentioned method are shown in Table 3.

[0082] Table 3 Test results of each example and comparative example

[0083]

[0084]

[0085] The recommended wearing time of nitrile gloves used in the medical field is 50-70 min, and the discoloration time of the rubber gloves in Examples 1-7 is in the range of 53-69 min, which well meets the requirement that the wearer can be reminded to replace the gloves in time when the protective performance of the gloves begins to decline; the rubber gloves in Comparative Example 1 have not yet shown color at the end of the recommended wearing time (i.e., the discoloration time is > 120 min), which indicates that a longer time is needed to observe the discoloration, and the wearer cannot be reminded to replace the gloves in time; the discoloration time of Comparative Example 2 is 28 min, that is, the rubber gloves have already discolored when the protective performance of the gloves is good, which will make the wearer mistakenly think that the protective performance of the gloves has declined, resulting in frequent replacement of the gloves with good protective performance and causing resource waste.

[0086] The hydrogen type discoloration cation exchange resin in the rubber glove is dark green in itself, so that the rubber glove presents green color and changes from green to red under the action of sweat; and the main role of titanium white powder is to reduce the influence of the background color of the glove on the change of the indicating color, so that the human eye is easier to observe the color change of the glove, thereby realizing a more accurate and intuitive judgment on the invalidation time of the nitrile glove wearing. The particle size of the titanium white powder has little influence on the role, and the titanium white powder commonly used in the prior art and added in the glove can meet the requirements. Meanwhile, it can be found from the comparative example 3 that when the rubber glove does not contain titanium white powder, the discoloration time of the rubber glove becomes 104 min, which has greatly exceeded the recommended wearing time (50-70 min) of the nitrile glove, that is, the wearer receives the prompt of replacing the glove when the protection performance of the glove has been reduced for dozens of minutes, which cannot play the role of reminding the wearer to replace the glove in time.

[0087] The above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. All the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A rubber glove characterized by, The rubber glove comprises nitrile rubber, titanium white, and discoloring cation exchange resin. The mass percentage of the titanium white with respect to the nitrile rubber is 2.0% to 4.0%, and the mass percentage of the discoloring cation exchange resin with respect to the nitrile rubber is 0.1% to 0.3%. The discoloring cation exchange resin is hydrogen-type discoloring cation exchange resin, and the particle size distribution thereof is 15 μm ≤ D90 ≤ 20 μm.

2. The rubber glove according to claim 1, wherein The particle size distribution of the discoloring cation exchange resin is 17 μm ≤ D90 ≤ 19 μm.

3. The rubber glove of claim 1, wherein, The mass percentage of the titanium white with respect to the nitrile rubber is 2.5% to 3.5%.

4. The rubber glove of claim 1, wherein, The rubber glove further comprises sulfur, zinc oxide, anti-aging agent, and accelerator.

5. The rubber glove according to claim 4, wherein The accelerator is a mixture of zinc diethyl dithiocarbamate and zinc butyl dithiocarbamate, and the anti-aging agent is styrene phenol and / or p-phenylenediamine.

6. A method of producing the rubber glove according to any one of claims 1 to 5, characterized by, The method comprises the following steps: immersing a hand mold in a coagulant, drying; immersing the dried hand mold in a nitrile latex composition, drying, and then immersing the dried hand mold in the nitrile latex composition again, drying, to obtain a rubber glove; The nitrile latex composition comprises, by weight fraction, the following components: nitrile rubber 100 parts, ammonia water 1.0 to 3.0 parts, sulfur 1.0 to 2.0 parts, zinc oxide 2.0 to 4.0 parts, accelerator 0.4 to 1.0 parts, titanium white 2.0 to 4.0 parts, anti-aging agent 0.4 to 1.0 parts, discoloring cation exchange resin 0.1 to 0.3 parts, and water 70 to 140 parts; the discoloring cation exchange resin is hydrogen-type discoloring cation exchange resin, and the particle size distribution thereof is 15 μm ≤ D90 ≤ 20 μm.

7. The preparation method according to claim 6, characterized in that, The coagulant comprises, by weight fraction, calcium nitrate 10 to 15 parts, barrier coating 1 to 3 parts, and water 82 to 89 parts; the barrier coating is any one of silicone, stearic amide, or stearic acid amide; The calcium content of the coagulant is 10 wt% to 15 wt%.

8. The preparation method according to claim 6, characterized in that, The temperature for immersing the hand mold in the coagulant is 50 to 60°C, and the time is 2 to 6 seconds.

9. The preparation method according to claim 6, characterized in that, The temperature for immersing the hand mold in the nitrile latex composition is 25 to 34°C, and the time is 2 to 8 seconds.

10. Use of the rubber glove according to any one of claims 1 to 5 in a medical operation.

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