KR200349491Y1 - Water-curable polyurethane splint - Google Patents

Abstract

The present invention relates to an orthopedic fixation splint using a knitted fabric of a pile fabric (piles weave on a textile) as an outer structure of an inner structure impregnated with a hydraulic polyurethane composition. The fixing splint using the pile fabric with the structure of enhanced absorbency and permeability as the outer surface can be cured with a small amount of water without being completely immersed in the water during the procedure, as well as drying, breathability and sweat of unreacted residual water. The absorption is improved and the fit is improved by providing the patient with cushioning and a smooth curved surface after the procedure.

Description

Water-curable polyurethane splint

The present invention relates to an orthopedic fixation splint using a water-curable polyurethane composition, and in particular, a plurality of layers of knitted fabric coated with a water-curable polyurethane composition, or an outer side of a non-woven fabric impregnated with a water-curable polyurethane composition. It relates to a fastening splint in the form of covering or covering a pile weave on the side.

The above-mentioned pile weave is a three-dimensional fabric in which a loose pile (1) or a cut pile (1 ') is placed on a base fabric (2). In the present invention, a thick sock with a looped loop having a fluffy surface and The same fabric was used.

Recently, in orthopedic surgery, a splint for fixing a polyester, polypropylene nonwoven fabric, etc. is used as the outer surface of a plurality of knitted fabric sheets (3) coated with a hydrocurable polyurethane composition or a nonwoven fabric (3) impregnated with a hydrocurable polyurethane composition. It is used a lot. This fixation splint is used for fracture sites of patients after being immersed in water for a certain time, and after a certain time, it is hardened by a curing reaction between the water and the water-curable polyurethane composition to fix the fracture site.

The reason for using polyester or polypropylene nonwoven fabric as the outer fabric in the case of fixing splint using the hydraulic polyurethane composition is that the inner knitted fabric of the product due to the storage of the product before use or the hydraulic polyurethane material impregnated in the nonwoven fabric The purpose is to prevent the flow of the hardened polyurethane composition to adhere to the patient's skin after the procedure, and to improve the fit by reducing the hardness of the hardened polyurethane fixing splint to the patient after the procedure.

However, the currently used fixing splint is a polyester, polypropylene nonwoven fabric having poor water absorption and permeability as the outer fabric, and thus the residual moisture discharge and breathability of the patient after the procedure is lowered, and the water-curable poly impregnated into the inner structure. Inhibition of contact of the urethane composition with water is a barrier to the smooth curing reaction.

The purpose of the present invention is to replace the non-woven fabric used as the outer surface of the existing fixing splint with the pile fabric of the structure to enhance the water absorption and permeability, it is possible to cure with a small amount of water during the procedure, unreacted It is to provide a fixing splint that improves the fit of the patient after the procedure by improving the drying of moisture and breathability and sweat absorption. In addition, since the pile fabric is smoothly formed without folding in the curved portion due to its elasticity during the procedure, the procedure does not stimulate the patient's body.

1 is a detailed view of the pile fabric used in the present invention,

2 is a perspective view of the fixing splint of the present invention,

Figure 3 is a cross-sectional view of the fixing splint 5-5 of the present invention.

<Explanation of code | symbol about main part of drawing>

1: loop pile

1 ': cut pile

2: desktop fabric

3: Internal structure impregnated with the hydraulic polyurethane composition

4: pile fabric

In order to achieve the above object, the present invention provides a pile weave having the structure of FIG. 1 as the outer surface of a fixing splint.

Hereinafter, the present invention will be described in more detail based on the following examples. However, the following examples are not intended to limit the invention only.

Preparation of Hydrosetting Polyurethane Fixing Splints

Example 1

Korea Polyol's KONIX PP-1000 300g, Diphenylmethanediisocyanate (Dow Chemical's ISONATE 2143 LK) 557.7g and Polypropyleneglycol, Glycerine started polypropylene glycol, LG-ARCOL 650) 34.52g, 4.74g of silicon dioxide as urethane resin flow inhibitor, 10.87g of polydimethylsiloxane (Antifoam-A, Dow Corning, USA) as a defoaming agent and stirred, and then supplied a 100 ℃ bath solution The mixture was stirred while heating at a rate of 1.08 ° C./min.The heating was stopped when the internal temperature was 80 to 90 ° C., the reaction vessel was sealed, and the internal temperature was cooled at 0.5 ° C./min. When the cooling is stopped, add 12.36 g of DMDEE as a hydrocuring reaction catalyst, stir until evenly mixed, and add 0.52 g of MSA as a stabilizer. With stirring in a container to obtain a water culture flammable polyurethane prepolymer.

Humidity in the reaction was maintained below 0.51% relative humidity (room temperature 32 ℃, 0.172g moisture / ㎥ air) throughout the reaction.

After applying the prepared prepolymer on the knitted fabric, it was overlapped with 8 layers and covered with a pile of socks-like pile fabric to complete the fixing splint.

Comparative Example 1

A fixing splint was prepared in the same manner as in Example 1 except that a nonwoven fabric having the same thickness was used as the outer fabric instead of the pile fabric used in Example 1.

Characteristic test

1 Curing reaction test by moisture absorption and permeation

Immediately after opening each fixing splint prepared in 76 cm width and 30 cm length according to Example 1 and Comparative Example 1 from the wrapping paper, the surface of the outer surface was sprayed with a sprayer at a rate of 0.13 g per cm 2 of unit surface area. After removing the outer shell after 30, place the hardened 8-ply casting sheet at right angles to the direction of gravity, and fasten the left end 3cm to the vise and fix it with a load of 1 kg at the right end. The angle between the vise fixation point and the right end point after load action was measured. As a result, the fixing splints of Example 1 and Comparative Example 1 exhibited values of 64 ° and 73 °, respectively.

2. residual moisture drying

After weighing 100 cm2 of outer fabric, the surface was sprayed with 5 g of water evenly with an atomizer, and then left at 36 ° C. for 60 minutes, and then the total weight was measured to calculate the moisture retention according to the following equation. The Example was 40% and the Comparative Example was 46%.

Water retention rate = (gross weight before drying-gross weight after drying) / water spray amount * 100

3. breathable test

Put 15g of cyanine blue powder (fine powder of 250 mesh or more) in a 300ml transparent container, seal the entrance of the container with splint, shake it at twice / sec speed for 15 seconds, and check the powder for leakage through the surface of the outer surface. .

In the examples, the leakage of the blue powder occurred on the outer surface sealing the inlet, but it could not be observed in the comparative example.

4. sweat absorbency test

Add enough water to cover all 10 cm diameter round Petri dishes. Cut the splint into a circle with a diameter of 8 cm and measure the weight. Leave it on for 1 minute on a Petri dish, then carefully take the splint shell and calculate the total weight.

Absorption rate (%) = (total surface weight after absorption-outer weight before absorption) / outer weight before absorption * 100 The results of the test were 289% for the examples and 24% for the comparative examples.

5. Elasticity test

Cut the outer fabric into 10cm length and 1cm width of the splint to fix the end, measure the initial length from the fixed end to the end, and measure the elongation by adding a 50g weight to this end.

Elongation (%) = (extended length-initial length) / initial length * 100

20% for the example and 0% for the comparative example.

6.Water-curable polyurethane composition flushing test

Seal the product using the pile fabric with the outer fabric and store it in a constant temperature bath at 50 ° C for 15 days, and then open it at room temperature to check whether the water-curable polyurethane composition impregnated into the inner structure (3) of the fixing splint flows down to the outer fabric. .

The test results were found in the base fabric (2) but not in the pile (1).

Test result

It can be seen from the results of Tests 1 and 3 that the pile weave can be used as the outer fabric to smoothly cure with a small amount of water, and that the moisture drying is improved. Improved sweat absorption can be seen from test 4.

In addition, when considering the results of the test 5, it can be seen that the pile fabric used as the outer fabric, due to its elasticity, unlike the non-woven outer fabric having little elasticity, the folded portion is reduced and the curved surface is formed more smoothly. have.

And, as a result of the test 6 it can be seen that the polyurethane composition impregnated into the inner structure (3) of the fixing splint does not adhere to the skin of the patient during the procedure.

When using a pile weave as the outer surface of the fixing splint, it is possible not only to completely immerse the fixing splint in water but also to cure smoothly with a small amount of water, and to maintain unreacted residual moisture and breathability. And it can be seen that sweat absorption is improved and to improve the fit by providing a cushion to the patient after the procedure.

In addition, the pile weavs used as the outer fabric is smooth due to its elasticity, so that the curved surface is formed smoothly without being folded in the curved portion, so that the body of the patient is not irritated after the procedure.

Claims (3)

Fixing splint using the pile fabric as shown in Figure 1 as the outer fabric (4). The fastening splint according to claim 1, wherein the water-curable prepolymer composition is applied to 6-10 ply knitted fabrics (3). The fastening splint of claim 1, wherein the water-curable prepolymer composition is impregnated into a polyester, polypropylene nonwoven fabric (3).