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Elastic polyurethane cladding non-powder rubber medical glove and method for producing the same

An elastic polyurethane and polyamic acid coating technology, applied in the field of medical supplies, can solve the problems of insufficient film density, inelasticity, and easy peeling of the coating, and achieve good biocompatibility, enhanced slippery effect, and mature preparation technology Effect

Inactive Publication Date: 2008-06-11
GUILIN ZIZHU LATEX PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some defects in the structure of water-based polyacrylic acid. First, because the film-forming substance is a linear molecule, it is easy to become soft and sticky in summer, and it is easy to become hard and brittle in winter; the second is that the side group of the film-forming substance is a polar ester The molecule has a certain degree of hydrophilicity; thirdly, due to the large particle size of the latex particles, the formed film is not dense enough
The above three points will lead to poor weather resistance, water resistance, pollution resistance and aging resistance of the coating film, and the gloss and adhesion fastness of the film are not ideal
In addition, the curing of polyacrylate is difficult to control. After curing on gloves, there is no elasticity or very little elasticity. In addition, the affinity with rubber is not good. The coating is easy to fall off during the use of gloves, resulting in secondary pollution and no powder rate. not meet the requirements
However, the blending of modified polyurethane emulsion and silicone as a powder-free rubber glove coating solution is not perfect in terms of materials and processes, and no industrial production has been seen so far.

Method used

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  • Elastic polyurethane cladding non-powder rubber medical glove and method for producing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The invention consists of a natural rubber glove body, an elastic polyurethane coating on the inner surface of the glove sleeve, and a modified polyacrylic acid coating on the outer surface of the glove sleeve. The preparation process includes the following steps:

[0033] 1. Prepare elastic polyurethane coating solution: Mix and stir according to the following raw materials and weight percentages, the stirring time is 10-20 hours, and the stirring speed is 60-100 rpm:

[0034] PU133-211 elastic polyurethane (30% concentration) 8.5

[0035] PHC-20 ultrafine inorganic silicon (20% concentration) 0.02

[0036] Soft water balance

[0037] 2. Preparation of modified polyacrylate coating solution:

[0038] Dilute it according to the ratio of modified polyacrylate MAX-30: soft water = 1:32 (component weight ratio), and use it after stirring for 30 minutes.

[0039] 3. Apply the elastic polyurethane cladding:

[0040] When impregnating the inner surface of the natural rubb...

Embodiment 2

[0046] The invention consists of a natural rubber glove body, an elastic polyurethane coating on the inner surface of the glove sleeve, and a modified polyacrylic acid coating on the outer surface of the glove sleeve. The preparation process includes the following steps:

[0047] 1. Prepare elastic polyurethane coating solution: Mix and stir according to the following raw materials and weight percentages, the stirring time is 10-20 hours, and the stirring speed is 60-100 rpm:

[0048] PU133-211 elastic polyurethane (30% concentration) 12

[0049] PHC-20 ultrafine inorganic silicon (20% concentration) 0.1

[0050] Soft water balance

[0051] 2. Preparation of modified polyacrylate coating solution:

[0052] Dilute it according to the ratio of modified polyacrylate MAX-30: soft water = 1:40 (component weight ratio), and use it after stirring for 30 minutes.

[0053] 3. Apply the elastic polyurethane cladding:

[0054] When impregnating the inner surface of the natural rubber g...

Embodiment 3

[0060] The invention consists of a natural rubber glove body, an elastic polyurethane coating on the inner surface of the glove sleeve, and a modified polyacrylic acid coating on the outer surface of the glove sleeve. The preparation process includes the following steps:

[0061] 1. Prepare elastic polyurethane coating solution: Mix and stir according to the following raw materials and weight percentages, the stirring time is 10-20 hours, and the stirring speed is 60-100 rpm:

[0062] PU133-211 elastic polyurethane (30% concentration) 16

[0063] PHC-20 ultrafine inorganic silicon (20% concentration) 0.14

[0064] Soft water balance

[0065] 2. Preparation of modified polyacrylate coating solution:

[0066] Dilute it according to the ratio of modified polyacrylate MAX-30: soft water = 1:40 (component weight ratio), and use it after stirring for 30 minutes.

[0067] 3. Apply the elastic polyurethane cladding:

[0068] When impregnating the inner surface of the natural rubbe...

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Abstract

The invention discloses elastic polyurethane coating powder-free rubber medical gloves and a production method. The gloves are characterized in that the coating on the inner surface of the glove body is a coating solution layer which is prepared by the mixing emulsion of elastic polyurethane emulsion (PU133-211) and ultra-fine mineral silicon (PHC-20), and the coating on the outer surface of the glove body is a coating solution layer which is prepared by the mixing emulsion of polyacrylic acid (MAX-30) and composition rubber. The production method comprises coating polyurethane coating solution on the inner surface of the glove under the condition of below 30 DEG C, then drying and taking off mold, coating polyacrylacid ester coating solution on the outer surface of the glove under the condition of below 40 DEG C, and finally plasticizing by heat air to obtain the finished product. The invention has the advantages of strong adhesive force of layer, free dropping, favorable water-solubility, dry touch of wearing and excellent humidity resistance, which keeps the natural color of the rubber, can effectively prevent the evolution of natural latex protein, is friendly to environment in the process of production, and can be industrially produced.

Description

technical field [0001] The invention relates to medical supplies, in particular to a powder-free rubber medical glove with elastic polyurethane coating and a production method. Background technique [0002] At present, the production of powder-free rubber medical gloves mainly adopts chlorine gas treatment process, and chlorination treatment is carried out on the surface of gloves. Chlorine gas reacts with natural rubber film to denature the rubber film, greatly reduce friction, and is easy to wear; , Chlorine gas is used, the production process causes environmental pollution, and the color of the gloves turns yellow, loses the natural color of natural latex, and cannot effectively block the precipitation of proteins. In 2000, Shanghai "New Coatings and Chemical Materials" reported that water-based polyacrylic acid or modified polyurethane emulsion and organic silicon were blended as powder-free rubber glove coating liquid. However, there are some defects in the structure o...

Claims

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Application Information

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IPC IPC(8): A61B19/04B29C71/00A61B42/10
Inventor 陶然江友潘龙益敏
Owner GUILIN ZIZHU LATEX PROD
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