KR20210120152A - Non-slip memory foam pad for surgical operation and manufacturing method thereof - Google Patents

Abstract

The present invention is a urethane foam layer; and an anti-skid pattern layer formed on the urethane foam layer and chemically and physically cross-linked with a partial region of the urethane foam layer; to a non-slip memory foam pad for surgery, including a, and a manufacturing method thereof.

Description

Non-slip memory foam pad for surgical operation and manufacturing method thereof {Non-slip memory foam pad for surgical operation and manufacturing method thereof}

The present invention relates to a non-slip memory foam pad for surgical operation and a method for manufacturing the same.

In abdominal surgery or robotic surgery, surgery is often performed in the Trendelenburg positioning, in which the patient is placed on the operating table and the foot of the bed is raised by 45 degrees for ease of operation, and the leg is higher than the head.

In this case, a shoulder support device was used to support the shoulder in order to prevent the patient from sliding in the direction of the head. There was a problem that the robot arm and the shoulder support device collided with each other, causing another inconvenience.

Therefore, it is necessary to develop a method that can reduce the load applied to the shoulder and prevent post-operative shoulder pain while smoothly performing robotic surgery without colliding with the robot arm.

As a similar prior document for this, Korean Patent No. 10-0536623 has been proposed.

Republic of Korea Patent Publication No. 10-0536623 (2005.12.07.)

In order to solve the above problems, the present invention provides a non-slip memory foam pad for surgical operation that can reduce the load applied to the shoulder to prevent post-operative shoulder pain while smoothly performing robotic surgery without colliding with a robot arm, and manufacturing thereof The purpose is to provide a method.

One aspect of the present invention for achieving the above object is a urethane foam layer; and an anti-slip pattern layer formed on the urethane foam layer and chemically and physically cross-linked with a partial region of the urethane foam layer.

In one aspect, the anti-slip pattern layer may include a modified synthetic rubber and ceramic nanoparticles.

In one aspect, the modified synthetic rubber may be any one or two or more selected from modified butadiene rubber (modified BR), modified styrene butadiene rubber (modified SBR), and modified styrene ethylene butylene styrene (modified SEBS) rubber.

In one aspect, the non-slip pattern layer may have a dot pattern, a stripe pattern, a grid pattern, or a mixture thereof.

In the one aspect, the urethane foam layer is a first urethane foam layer having a 25% compressive strength of 35 to 50 kgf / 314 ㎠, an apparent density of 50 to 80 kg / ㎥ and a rebound modulus of 60 to 75%; and a second urethane foam layer formed on the first urethane foam layer and having a 25% compressive strength of 3 to 8 kgf/314cm 2, an apparent density of 20 to 30 kg/m 3 and a rebound modulus of 40 to 60%; may include.

In one aspect, the thickness of the first urethane foam layer may be 20 to 80 mm, and the thickness of the second urethane foam layer may be 50 to 150 mm.

In the above aspect, the anti-slip memory foam pad for surgery may further include an anti-slip layer at the lower end of the urethane foam layer.

In addition, another aspect of the present invention comprises the steps of: a) preparing a urethane foam layer; And b) applying and curing the composition for the pattern layer according to the pattern designed on the upper surface of the urethane foam layer to form a non-slip pattern layer to be chemically and physically cross-linked with a portion of the upper portion of the urethane foam layer; It relates to a method of manufacturing a non-slip memory foam pad.

In another aspect, the composition for the pattern layer is any one selected from modified butadiene rubber (modified BR), modified styrene butadiene rubber (modified SBR), and modified styrene ethylene butylene styrene (modified SEBS) rubber; It may include rubber, ceramic nanoparticles, catalysts and solvents.

In another aspect, the manufacturing method comprises the steps of c) applying and curing a composition for an anti-slip layer on the lower surface of the urethane foam layer to form an anti-slip layer to chemically and physically cross-link with a partial region at the bottom of the urethane foam layer It may further include.

The non-slip memory foam pad for surgery according to the present invention has an anti-slip pattern layer, so that the patient does not easily slip in one inclined direction even after surgery in the Trendelenburg posture, and this anti-slip pattern layer is made of urethane Since it is chemically and physically crosslinked on the surface of the foam layer, interlayer adhesion may be very good, and accordingly, it may not be easily separated from the urethane foam layer. In addition, it is possible to prevent the cushioning feeling and elasticity of the urethane foam layer from being lowered by having a specific pattern.

In addition, since the patient does not slide easily by the anti-slip pattern layer, the weight of the patient may not be all on the shoulder and the like, and the urethane foam layer has excellent cushioning and elasticity to support the shoulder softly. The load on the back is greatly reduced, which can prevent pain in the shoulder after surgery.

In addition, since the anti-skid memory foam for surgical operation has a pad shape, it may not interfere with the movement of the robot arm during robotic surgery, and accordingly, the operation time may be shortened by enabling smooth operation.

In addition, as described above, as the load applied to the shoulder is reduced and a quick operation is possible, it is possible to prevent skin redness caused by a long operation time.

Hereinafter, a non-slip memory foam pad for surgical operation according to the present invention and a manufacturing method thereof will be described in detail. The drawings introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be exaggerated to clarify the spirit of the present invention. At this time, if there is no other definition in the technical terms and scientific terms used, it has the meaning commonly understood by those of ordinary skill in the technical field to which this invention belongs, and the gist of the present invention in the following description and accompanying drawings Descriptions of known functions and configurations that may be unnecessarily obscure will be omitted.

When surgery is performed in the Trendelenburg positioning, a shoulder support device is used to support the shoulder in order to prevent the patient from sliding in the direction of the head, but the load due to the weight is severely applied to the shoulder and the shoulder after surgery. There are many cases of complaints of pain, and there is a problem in that the robot arm and the shoulder support device collide with each other during robot surgery, causing another inconvenience.

Accordingly, the inventors of the present inventors have studied repeatedly for a method to solve the above problem. The present invention was completed by discovering that it is possible to prevent shoulder pain after surgery by reducing the load on the back, and to perform robotic surgery smoothly without colliding with the robot arm.

Specifically, one aspect of the present invention is a urethane foam layer; and an anti-slip pattern layer formed on the urethane foam layer and chemically and physically cross-linked with a partial region of the urethane foam layer.

The non-slip memory foam pad for surgery has an anti-slip pattern layer, so that the patient can not easily slip in one inclined direction even after surgery in the Trendelenburg position. This anti-slip pattern layer is the Since it is chemically and physically crosslinked on the surface, interlayer adhesion may be very good, and accordingly, it may not be easily separated from the urethane foam layer. In addition, it is possible to prevent the cushioning feeling and elasticity of the urethane foam layer from being lowered by having a specific pattern.

In addition, since the patient does not slide easily by the anti-slip pattern layer, the weight of the patient may not be all on the shoulder and the like, and the urethane foam layer has excellent cushioning and elasticity to support the shoulder softly. The load on the back is greatly reduced, which can prevent pain in the shoulder after surgery.

In addition, since the anti-skid memory foam for surgical operation has a pad shape, it may not interfere with the movement of the robot arm during robotic surgery, and accordingly, the operation time may be shortened by enabling smooth operation.

In addition, as described above, as the load applied to the shoulder is reduced and a quick operation is possible, it is possible to prevent skin redness caused by a long operation time.

Hereinafter, each layer of the non-slip memory foam pad for surgery according to an embodiment of the present invention will be described in more detail.

First, the non-slip pattern layer will be described.

The anti-slip pattern layer is to reduce the patient's slipping to one side when the surgery is performed in an inclined position such as the Trendelenburg posture, and by having a high friction force, it effectively catches the patient and reduces the sliding to the lower side, which is applied to the shoulder, etc. The load can be reduced, thereby preventing shoulder pain and allowing the operation to proceed more smoothly.

To this end, it is important that the anti-slip pattern layer has excellent frictional force while not lowering the cushioning and elasticity of the urethane foam layer at the lower end. can have, and by having a specific pattern, it is possible to prevent the cushioning and elasticity of the urethane foam layer from being lowered.

As a more specific example, the anti-slip pattern layer may include modified synthetic rubber and ceramic nanoparticles, and through this, excellent friction is provided, so that when surgery is performed in an inclined posture, such as Trendelenberg posture, the patient can turn to one side. It can reduce slipping.

As a preferred example, the modified synthetic rubber suitable for the present invention may be any one or two or more selected from modified butadiene rubber (modified BR), modified styrene butadiene rubber (modified SBR), and modified styrene ethylene butylene styrene (modified SEBS) rubber. and a particularly preferred modified synthetic rubber may be a modified styrene ethylene butylene styrene (modified SEBS) rubber. The modified SEBS rubber has excellent frictional force and excellent flexibility to ensure excellent anti-slip performance and at the same time prevent the excellent cushioning and elasticity of the urethane foam layer from being deteriorated. The weight average molecular weight of the modified synthetic rubber is not particularly limited, but may be 10,000 to 50,000 g/mol, and more preferably 15,0000 to 35,000 g/mol.

In addition, the modified synthetic rubber is a component that is substantially chemically cross-linked with the surface portion of the urethane foam layer. That is, the non-slip pattern layer and the urethane foam layer may be cross-linked with each other by reacting the modified synthetic rubber into which the active hydrogen functional group is introduced and the unreacted isocyanate group at the upper end of the urethane foam layer. At this time, the active hydrogen functional group is not particularly limited as long as it is a functional group capable of reacting with an isocyanate group, but in terms of effective cross-linking, _{any one or two selected from a hydroxyl group (-OH), an amino group (-NH 2} ) and a thiol (-SH) more preferably.

As such, the active hydrogen functional group of the modified synthetic rubber and the unreacted isocyanate group of the urethane foam layer are chemically bonded to each other, and are physically cross-linked by the modified synthetic rubber penetrating into the upper surface of the porous urethane foam layer. The layer may not come off easily from the urethane foam layer.

On the other hand, ceramic nanoparticles suitable for the present invention include oxides such as alumina, zirconia, silica; carbides such as tungsten carbide (WC), titanium carbide (TiC), and silicon carbide (SiC); and nitrides such as cubic boron nitride (CBN), titanium nitride (TiN), and silicon nitride (Si ₃ N ₄ ); Any one or a mixture of two or more selected from the group consisting of, etc. may be used, and may be an oxide, but is not necessarily limited thereto.

The size of the ceramic nanoparticles is well mixed with the modified synthetic rubber, and it is preferable that it does not cause discomfort to the patient, and as a specific example, it may be 10 to 500 nm, preferably 30 to 200 nm, but is not necessarily limited thereto. it is not

The ceramic nanoparticles may be added in an amount of 3 to 30 parts by weight, more preferably 5 to 25 parts by weight, and most preferably 10 to 20 parts by weight based on 100 parts by weight of the modified synthetic rubber. In the above range, the anti-slip pattern layer has excellent frictional force, and while providing improved anti-slip performance, it does not become too hard and may not cause discomfort to the patient.

Preferably, the ceramic nanoparticles may be surface-modified with a silane compound containing an isocyanate group. Accordingly, not only the modified synthetic rubber and the urethane foam layer but also the modified synthetic rubber and the ceramic nanoparticles are chemically tightly bonded, so that the non-slip pattern layer can be strongly adhered to the upper surface of the urethane foam layer.

Specifically, the silane compound containing an isocyanate group may be a silane compound containing an isocyanate group at the terminal, and the ceramic nanoparticles surface-modified with a silane compound containing an isocyanate group are ceramic based on 100 parts by weight of a silane compound containing an isocyanate group. It may be dried after adding 5 to 30 parts by weight of nanoparticles and stirring at a speed of 50 to 150 rpm for 5 to 60 minutes, and the drying may be performed by hot air drying at a temperature of 50 to 70° C. for 1 to 24 hours. have.

In this case, the silane compound containing the isocyanate group may be at least one compound selected from the group consisting of isocyanatepropyltrimethoxysilane and 3-isocyanatepropyltriethoxysilane.

On the other hand, as described above, the anti-slip pattern layer according to an embodiment of the present invention can prevent the cushioning feeling and elasticity of the urethane foam layer from being lowered by having a specific pattern. As a specific example, the non-slip pattern layer may have a shape of a dot, a stripe, a grid, or a mixture thereof, wherein the stripe may be a straight line, a curved line, or a combination thereof. have.

As a preferred example, when the non-slip pattern layer is a dot pattern, the diameter of the dot may be 1 to 10 mm, more preferably 2 to 5 mm, and the pitch between adjacent dots (distance from center to center) may be 5 to 50 mm, more preferably 10 to 30 mm. When the anti-slip pattern layer is a stripe or grid pattern, the width of the line may be 1 to 10 mm, more preferably 2 to 5 mm, and the pitch between adjacent lines (the distance from the center to the center) is 5 to 10 mm. It may be 50 mm, more preferably 10 to 30 mm. In addition, the thickness of the anti-slip pattern layer may be 0.1 to 2 mm, more preferably 0.3 to 1 mm. By having such a size, thickness, and spacing, it is possible to effectively maintain the cushioning and elasticity of the urethane foam layer while providing excellent frictional force, and to give no discomfort to the patient.

Next, the urethane foam layer will be described.

The urethane foam layer may be a soft urethane foam layer, and by having excellent cushioning and elasticity, it can effectively reduce the load applied to the shoulder and the like by softly supporting the patient's shoulder even after surgery in the Trendelenburg posture.

Preferably, the urethane foam layer may include a first urethane foam layer having a relatively high compressive strength, and a second urethane foam layer having a relatively low compressive strength. As such, by having two types of urethane foam layers with different compressive strengths, it is possible to ensure that part of the patient's weight is evenly distributed on the pad even during surgery in the Trendelenberg position. It can more effectively prevent the occurrence of pain.

As a specific example, the urethane foam layer is a first urethane foam layer having a 25% compressive strength of 35 to 50 kgf / 314 ㎠, an apparent density of 50 to 80 kg / ㎥ and a rebound modulus of 60 to 75%; and a second urethane foam layer formed on the first urethane foam layer and having a 25% compressive strength of 3 to 8 kgf/314cm 2, an apparent density of 20 to 30 kg/m 3 and a rebound modulus of 40 to 60%; It may include, and more preferably, a first urethane foam layer having a 25% compressive strength of 38 to 45 kgf / 314cm 2 , an apparent density of 60 to 75 kg / m 3 and a rebound modulus of 63 to 70%; and a second urethane foam layer formed on the first urethane foam layer and having a 25% compressive strength of 4 to 7 kgf/314cm 2, an apparent density of 23 to 27 kg/m 3 and a rebound modulus of 45 to 55%; may include. In the above range, it is possible to effectively distribute the weight while providing a sufficient cushioning feeling to the patient to prevent excessive load from being transferred to the shoulder, thereby minimizing the induction of shoulder pain.

On the other hand, when the compressive strength of the first urethane foam layer is less than 35 kgf/314㎠, the strength to support the patient is insufficient and the weight distribution effect becomes insignificant, so an excessive load may be driven to the shoulder, and the compressive strength is 50 kgf/314 If it exceeds ㎠, the hardness is high, and the weight distribution effect may be insignificant, and the cushioning feeling may be reduced. In addition, if the compressive strength of the second urethane foam layer is less than 3 kgf/314 cm2, the hardness is too low to provide a sufficient cushioning feeling to the patient. Because it is difficult to support the patient, the effect of reducing shoulder pain may be reduced.

In particular, in order to achieve the target effect, the thickness of each layer is important, the thickness of the first urethane foam layer is 20 to 80 mm, and the thickness of the second urethane foam layer may be 50 to 150 mm, more preferably the The thickness of the first urethane foam layer may be 30 to 60 mm, and the thickness of the second urethane foam layer may be 80 to 120 mm. In this range, the patient can lie softly on the pad while being firmly supported by the first urethane foam layer, and the weight distribution effect can be improved. In particular, the thickness of the second urethane foam layer is more important. If the thickness of the second urethane foam layer is less than 50 mm, it may be difficult to support the patient softly in the Trendelenberg posture. It may interfere with surgery.

In addition, the non-slip memory foam pad for surgery according to an embodiment of the present invention may further include an anti-slip layer at the lower end of the urethane foam layer. That is, the anti-slip memory foam pad for surgery according to an embodiment of the present invention may have a structure in which an anti-slip layer, a first urethane foam layer, a second urethane foam layer and an anti-slip pattern layer are sequentially stacked from the bottom.

The non-slip layer is for preventing the non-slip memory foam pad for surgical operation from sliding easily from the operating table, and may be formed of the same component as the non-slip pattern layer, which is also chemically and physically crosslinked with a portion of the lower portion of the urethane foam layer may be combined. Through this, it can be firmly combined with the urethane foam layer while securing excellent anti-slip performance.

Specifically, the anti-slip layer may include modified synthetic rubber and ceramic nanoparticles, and specific types and contents may be the same as described for the anti-slip pattern layer. In addition, the thickness of the anti-slip layer may be 1 to 20 mm, more preferably 2 to 5 mm, but is not necessarily limited thereto.

In addition, another aspect of the present invention relates to a method for manufacturing the above-described non-slip memory foam pad for surgery, as a specific example a) preparing a urethane foam layer; And b) applying and curing the composition for the pattern layer according to the pattern designed on the upper surface of the urethane foam layer to form an anti-slip pattern layer to be chemically and physically crosslinked with a portion of the upper portion of the urethane foam layer.

First, a) step of preparing the urethane foam layer may be performed.

As described above, the urethane foam layer may be a flexible urethane foam layer, and preferably, the urethane foam layer includes a first urethane foam layer having a relatively high compressive strength, and a second urethane foam layer having a relatively low compressive strength. As possible, the urethane foam layer can be prepared by first preparing each layer and then laminating and bonding them.

As a specific example, in step a), a-1) a first having a 25% compressive strength of 35 to 50 kgf/314cm2, an apparent density of 50 to 80 kg/m3, and a rebound modulus of 60 to 75% urethane foam layer; and a second urethane foam layer having a 25% compressive strength of 3 to 8 kgf/314cm 2 , an apparent density of 20 to 30 kg/m 3 and a rebound modulus of 40 to 60%; preparing each; and a-2) laminating and adhering the second urethane foam layer on the first urethane foam layer.

More preferably, a first urethane foam layer having a 25% compressive strength of 38 to 45 kgf / 314 cm 2, an apparent density of 60 to 75 kg / m 3 and a rebound modulus of 63 to 70%; and a second urethane foam layer formed on the first urethane foam layer and having a 25% compressive strength of 4 to 7 kgf/314cm 2, an apparent density of 23 to 27 kg/m 3 and a rebound modulus of 45 to 55%; Each can be prepared. By preparing the urethane foam layer to satisfy the above physical property range, it is possible to provide a sufficient cushioning feeling to the patient while effectively distributing the weight to prevent excessive load from being concentrated on the shoulder, thereby minimizing the induction of pain in the shoulder.

Next, b) applying and curing the composition for the pattern layer according to the pattern designed on the upper surface of the urethane foam layer to form an anti-slip pattern layer to chemically and physically cross-link with a partial region of the upper portion of the urethane foam layer. .

In this case, the previously designed pattern may have a shape of dots, stripes, or a mixture thereof, as described above, and in this case, the stripes may have a shape of a straight line, a curved line, or a combination thereof.

On the other hand, the composition for the pattern layer is any one or two or more modified synthetic rubber, ceramic nanoparticles selected from modified butadiene rubber (modified BR), modified styrene butadiene rubber (modified SBR), and modified styrene ethylene butylene styrene (modified SEBS) rubber. , a catalyst and a solvent may be included.

As a preferred example, the modified synthetic rubber suitable for the present invention may be any one or two or more selected from modified butadiene rubber (modified BR), modified styrene butadiene rubber (modified SBR), and modified styrene ethylene butylene styrene (modified SEBS) rubber. and a particularly preferred modified synthetic rubber may be a modified styrene ethylene butylene styrene (modified SEBS) rubber. The modified SEBS rubber has excellent frictional force and excellent flexibility to ensure excellent anti-slip performance and at the same time prevent the excellent cushioning and elasticity of the urethane foam layer from being deteriorated.

In addition, the modified synthetic rubber is a component that is substantially chemically cross-linked with the surface portion of the urethane foam layer. That is, the non-slip pattern layer and the urethane foam layer may be cross-linked with each other by reacting the modified synthetic rubber into which the active hydrogen functional group is introduced and the unreacted isocyanate group at the upper end of the urethane foam layer. At this time, the active hydrogen functional group is not particularly limited as long as it is a functional group capable of reacting with an isocyanate group, but in terms of effective cross-linking, _{any one or two selected from a hydroxyl group (-OH), an amino group (-NH 2} ) and a thiol (-SH) more preferably.

As such, the active hydrogen functional group of the modified synthetic rubber and the unreacted isocyanate group of the urethane foam layer are chemically bonded to each other, and are physically cross-linked by the modified synthetic rubber penetrating into the upper surface of the porous urethane foam layer. The layer may not come off easily from the urethane foam layer.

Ceramic nanoparticles suitable for the present invention include oxides such as alumina, zirconia, silica; carbides such as tungsten carbide (WC), titanium carbide (TiC), and silicon carbide (SiC); and nitrides such as cubic boron nitride (CBN), titanium nitride (TiN), and silicon nitride (Si ₃ N ₄ ); Any one or a mixture of two or more selected from the group consisting of, etc. may be used, and may be an oxide, but is not necessarily limited thereto.

The ceramic nanoparticles may be added in an amount of 3 to 30 parts by weight based on 100 parts by weight of the modified synthetic rubber, more preferably 5 to 25 parts by weight, and most preferably 10 to 20 parts by weight. In the above range, the anti-slip pattern layer has excellent frictional force, and while providing improved anti-slip performance, it does not become too hard and may not cause discomfort to the patient.

Preferably, the ceramic nanoparticles may be surface-modified with a silane compound containing an isocyanate group. Accordingly, not only the modified synthetic rubber and the urethane foam layer but also the modified synthetic rubber and the ceramic nanoparticles are chemically tightly bonded, so that the non-slip pattern layer can be strongly adhered to the upper surface of the urethane foam layer.

Specifically, the silane compound containing an isocyanate group may be a silane compound containing an isocyanate group at the terminal, and the ceramic nanoparticles surface-modified with a silane compound containing an isocyanate group are ceramic based on 100 parts by weight of a silane compound containing an isocyanate group. It may be dried after adding 5 to 30 parts by weight of nanoparticles and stirring at a speed of 50 to 150 rpm for 5 to 60 minutes, and the drying may be performed by hot air drying at a temperature of 50 to 70° C. for 1 to 24 hours. have.

In this case, the silane compound containing the isocyanate group may be at least one compound selected from the group consisting of isocyanatepropyltrimethoxysilane and 3-isocyanatepropyltriethoxysilane.

The catalyst may be used without particular limitation as long as it is used in the urethane reaction, for example, any one or two or more selected from the group consisting of alkali metal hydroxide catalysts, alkaline earth metal hydroxide catalysts and amine catalysts, and specific Examples include copper naphthenate, dibutylyin dilaurate, triethylene diamine, dimethyl ethanol amine, tetramethyl butane diamine, dimethyl Dimethyl cyclohexyl amine, Triethylamine, Stannous octoate, Pentamethylene diethylenetriamine, Dimethyl cyclohexyl amine, Tris(3-dimethyl) Amino) propyl hexahydrotriamine Tris (3-dimethylamino) propyl hexahydrotriamine and triethylene diamine (Triethylene diamine) may be any one or two or more selected from the group consisting of, preferably an amine-based catalyst. The catalyst may be added in an amount of 0.01 to 3 parts by weight based on 100 parts by weight of the modified synthetic rubber, more preferably 0.1 to 2 parts by weight, and most preferably 0.5 to 1.5 parts by weight.

The solvent may be used without particular limitation as long as the modified synthetic rubber is well soluble, and specific examples include chloroform, chlorobenzene, dichlorobenzene, trichlorobenzene, tetrahydrofuran (THF), formamide, dimethylformamide (DMF). ), dimethylacetamide (DMAC), dimethyl sulfoxide (DMSO), toluene, gamma-butyrolactone, acetonitrile, diethylene glycol, 1-methyl-2-pyrrolidone, acetone, acetylacetone, α-ter Pineol, β-terpineol, dihydroterpineol, 2-methoxy ethanol, methanol, ethanol, propanol, butanol, pentanol, hexanol, and methylisobutyl ketone for any one or a mixture of two or more can be every day.

The content of such a solvent may be adjusted so that the composition for a pattern layer has fluidity suitable for coating or printing. may be added in an amount of 100 to 250 parts by weight. In this range, the composition for the pattern layer has an appropriate viscosity and can be easily applied in the form of a pre-planned pattern on the urethane foam layer.

On the other hand, the method for applying the composition for the pattern layer is not particularly limited as long as it is a method commonly used in the art, and for example, the composition for the pattern layer is applied through screen printing, inkjet printing, doctor blade or gravure printing method. can do.

Thereafter, the non-slip pattern layer can be completed through drying and aging processes.

In addition, the manufacturing method according to an embodiment of the present invention, c) coating and curing the composition for an anti-skid layer on the lower surface of the urethane foam layer to form an anti-slip layer to chemically and physically cross-link with a partial region at the bottom of the urethane foam layer It may include further steps.

In this case, the composition for the anti-skid layer may be the same as the composition for the pattern layer, and unlike the composition for the pattern layer, the composition for the anti-slip layer is applied over the lower end of the urethane foam layer and cured to form the anti-slip layer.

Hereinafter, a non-slip memory foam pad for surgical operation according to the present invention and a manufacturing method thereof will be described in more detail through examples. However, the following examples are only a reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

Also, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of effectively describing particular embodiments only and is not intended to limit the invention. In addition, the unit of additives not specifically described in the specification may be weight %.

[Characteristic evaluation method]

1) The 25% compressive strength, apparent density, and rebound modulus of the urethane foam layer were measured by the JIS K-6401 test method.

2) Slip resistance (BPN): Slip resistance was measured according to the KS F 2375 test method.

3) Shore A hardness: After preparing a specimen by coating and drying the composition for a pattern layer to a certain size, Shore A hardness was measured according to the DIN 53 505 test method.

4) Interfacial peel strength (kgf/inch): After applying the composition for the pattern layer to the entire upper surface of the urethane foam layer, drying and curing to prepare a specimen, the interfacial peel strength was measured according to the JIS K-6401 test method. .

[Example 1]

The first urethane foam layer (thickness 50 mm, 25% compressive strength 42 kgf/314 cm2, apparent density 68 kg/m3, rebound modulus 66%) and the second urethane foam layer (thickness 100 mm, 25% compressive strength 5.5 kgf/ After preparing each of 314cm2, apparent density 25 kg/m3, rebound modulus 50%), a second urethane foam layer (PUF-2) was laminated and adhered on the first urethane foam layer (PUF-1) using a urethane adhesive. A urethane foam layer was formed.

Next, with respect to 100 parts by weight of the modified SEBS rubber (m-SEBS-OH, weight average molecular weight 23,000 g/mol) introduced with a hydroxyl group, 15 parts by weight of silica nanoparticles, 1 part by weight of dimethyl ethanolamine (DMEA) and 1, A composition for a pattern layer was prepared by mixing 200 parts by weight of 3-dichlorobenzene (DCB).

At this time, the silica nanoparticles were added to 20 parts by weight of silica nanoparticles (average diameter of 50 nm) based on 100 parts by weight of isocyanate propyltrimethoxysilane, stirred at a speed of 100 rpm for 10 minutes, and then heated to a temperature of 50° C. for 2 hours. Surface-modified silica nanoparticles prepared by hot air drying were used.

After printing the composition for the pattern layer on the prepared urethane foam layer in a dot pattern, drying and curing at room temperature (about 25° C.) so that the non-slip pattern layer is chemically and physically cross-linked with a partial region of the upper part of the second urethane foam layer according to the pattern to form an anti-slip pattern layer (dot diameter 3 mm, pitch 15 mm, thickness 0.8 mm).

Finally, the same composition for the pattern layer as described above was applied to the entire surface of the lower end (outermost surface of the first urethane foam layer) of the urethane foam layer, dried and cured to form an anti-slip layer (5 mm).

[Examples 2 to 10]

All processes were performed in the same manner as in Example 1 except that the content of each component of the composition for pattern layer was changed as shown in Table 1 below.

[Comparative Example 1]

Without forming an anti-slip pattern layer, only the urethane foam layer was prepared in the same manner as in Example 1.

[Comparative Example 2]

All processes were performed in the same manner as in Example 1 except that the content of each component of the composition for pattern layer was changed as shown in Table 1 below.

[Comparative Example 3]

All processes were carried out in the same manner as in Example 1 except that m-SEBS-OH was used instead of modified SEBS rubber (m-SEBS, weight average molecular weight of 22,000 g/mol) in which a hydroxyl group was not introduced.

The slip resistance, Shore A hardness, and interfacial peel strength of the specimens prepared in Examples 1 to 10 and Comparative Examples 1 to 3, respectively, were evaluated by the above-described test method, and then the values are shown in Table 1 below.

Composition for pattern layer (parts by weight) slip resistance
(BPN) Shore A hardness Interfacial peel strength
(kgf/inch) m-SEBS-OH silica DMEA DCB Example 1 100 15 One 200 79 34 0.52 Example 2 One 70 25 - Example 3 3 74 27 - Example 4 20 80 39 - Example 5 30 82 47 - Example 6 50 85 60 - Example 7 100 15 One 10 (not measurable) (not measurable) - Example 8 50 81 37 - Example 9 300 78 35 - Example 10 500 65 31 - Comparative Example 1 x x x x 59 - - Comparative Example 2 100 x One 200 68 24 - Comparative Example 3 100
(m-SEBS) 15 One 200 78 30 0.20

As shown in Table 1, the experimental results showed that Examples 1, 4, and 9 had excellent sliding resistance and low Shore A hardness, which effectively prevented the patient from slipping, and provided a hardness that did not cause discomfort to the patient. I could confirm that I had. In addition, Examples 3 and 5 also had excellent properties.

On the other hand, in Example 2, the slip resistance was low as the amount of silica was added too little, and in Example 6, the surface hardness was greatly increased due to the excessive amount of silica added. .

Comparative Example 1 did not form an anti-slip pattern layer, and had a very low sliding resistance, so that a patient could easily slip when surgery was performed in an inclined posture such as Trendelenberg posture, Comparative Example 2 did not add silica As the non-slip pattern layer was formed without slipping, the slip resistance was also low.

In addition, in Example 7, the pattern application itself was impossible because m-SEBS-OH was not completely dissolved as the solvent was added in too small amount. However, there was a problem that the pattern thickness increased when the same amount was applied, causing discomfort to the patient. In the case of Example 10, as the solvent was used in too much, the viscosity of the composition was too low, so there was a problem that most of the composition permeated into the urethane foam layer, and thus the sliding resistance was lowered.

On the other hand, in Example 1 and Comparative Example 3, a modified synthetic rubber was used differently, and in Example 1 using m-SEBS-OH to which a hydroxyl group was introduced, the hydroxyl group of the modified synthetic rubber and the unreacted isocyanate group remaining in the urethane foam layer reacted with each other. The interfacial peel strength was greatly increased by chemical crosslinking, but in Comparative Example 3, chemical crosslinking did not occur as a modified synthetic rubber without a hydroxyl group was used, and the interfacial peel strength was not as good as in Example 1.

[Examples 11 to 14]

All processes were performed in the same manner as in Example 1 except that the first urethane foam layer and the second urethane foam layer were prepared to have the physical property values shown in Table 2 below.

[Comparative Example 4]

All processes were performed in the same manner as in Example 1 except that only the first urethane foam layer having a thickness of 150 mm was used.

[Comparative Example 5]

All processes were performed in the same manner as in Example 1 except that only the second urethane foam layer having a thickness of 150 mm was used.

When the Trendelenberg posture was taken with the pads prepared in Examples 1, 11 to 14, and Comparative Examples 4 to 5, respectively, cushioning and shoulder pain were sensory evaluated. Specifically, 5 members of the evaluation group gave a score using a 10-point item scale, and the better the cushioning feeling, the more comfortable, and the less shoulder pain, the higher the score, and the average value is shown in Table 3 below.

PUF-1 PUF-2 compressive strength
(kgf/314cm2) Apparent density
(kg/m3) modulus of rebound
(%) compressive strength
(kgf/314cm2) Apparent density
(kg/m3) modulus of rebound
(%) Example 1 43 68 66 5.5 25 50 Example 11 28 45 35 1.5 18 33 Example 12 28 45 35 5.5 25 50 Example 13 43 68 66 1.5 18 33 Example 14 60 73 70 10 35 65 Comparative Example 4 43 68 66 x Comparative Example 5 x 5.5 25 50

cushion feeling shoulder pain Example 1 9.6 9.0 Example 11 8.8 3.8 Example 12 8.6 6.4 Example 13 8.2 4.2 Example 14 5.8 1.8 Comparative Example 4 2.6 0.4 Comparative Example 5 7.6 6.0

As shown in Table 3, the experimental results, particularly in the case of Example 1, was able to effectively prevent pain while providing excellent cushioning. This is an effect according to which the second polyurethane foam layer of the upper layer provides sufficient softness and elasticity, and the first polyurethane foam layer of the lower layer supports the patient and distributes the weight.

On the other hand, in Example 11, both layers were too soft and caused shoulder pain as the elasticity decreased. This occurred somewhat, and in Example 13, shoulder pain occurred as the elasticity of the second urethane foam layer was too soft, and in Example 14, as both layers had high compressive strength, the softness was lowered and shoulder pain was reduced. occurred.

On the other hand, in Comparative Example 4, as the urethane foam layer was used only with the first urethane foam layer having high hardness, the cushioning feeling was low and shoulder pain was severe, and in Comparative Example 5, the urethane foam layer was used only with the second urethane foam layer having low hardness. The effect of distributing weight was poor, and some shoulder pain occurred.

Although the present invention has been described through the specific matters and limited examples as described above, these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and the present invention pertains to Various modifications and variations are possible from these descriptions by those of ordinary skill in the art.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims to be described later, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

Claims (10)

urethane foam layer; and
an anti-slip pattern layer formed on the urethane foam layer and chemically and physically cross-linked with a partial region of the urethane foam layer;
Non-slip memory foam pad for surgical operation comprising a.
The method of claim 1,
The non-slip pattern layer is a non-slip memory foam pad for surgery, comprising a modified synthetic rubber and ceramic nanoparticles.
The method of claim 1,
The modified synthetic rubber is any one or two or more selected from modified butadiene rubber (modified BR), modified styrene butadiene rubber (modified SBR) and modified styrene ethylene butylene styrene (modified SEBS) rubber, non-slip memory foam pad for surgery .
The method of claim 1,
The non-slip pattern layer is a dot pattern (dot), stripe (stripe), a grid pattern (grid) or a shape of a mixture thereof, a non-slip memory foam pad for surgery.
The method of claim 1,
The urethane foam layer is a first urethane foam layer having a 25% compressive strength of 35 to 50 kgf / 314 ㎠, an apparent density of 50 to 80 kg / ㎥ and a rebound modulus of 60 to 75%; and
A second urethane foam layer formed on the first urethane foam layer and having a 25% compressive strength of 3 to 8 kgf/314cm 2, an apparent density of 20 to 30 kg/m 3 and a rebound modulus of 40 to 60%; includes; A non-slip memory foam pad for surgical use.
6. The method of claim 5,
The thickness of the first urethane foam layer is 20 to 80 mm, and the thickness of the second urethane foam layer is 50 to 150 mm, anti-slip memory foam pad for surgery.
The method of claim 1,
The non-slip memory foam pad for surgery further comprises an anti-slip layer at the lower end of the urethane foam layer, the non-slip memory foam pad for surgery.
a) preparing a urethane foam layer; and
b) forming a non-slip pattern layer to be chemically and physically crosslinked with a partial region of the upper portion of the urethane foam layer by applying and curing the composition for the pattern layer according to the pattern designed on the upper surface of the urethane foam layer;
A method of manufacturing a non-slip memory foam pad for surgery comprising a.
9. The method of claim 8,
The composition for the pattern layer may include any one or two or more modified synthetic rubbers, ceramic nanoparticles, and catalysts selected from modified butadiene rubber (modified BR), modified styrene butadiene rubber (modified SBR), and modified styrene ethylene butylene styrene (modified SEBS) rubber. And a method of manufacturing a non-slip memory foam pad for surgery, comprising a solvent.
9. The method of claim 8,
The manufacturing method is
c) applying and curing a composition for an anti-skid layer on the lower surface of the urethane foam layer to form an anti-slip layer to chemically and physically cross-link with a partial region at the bottom of the urethane foam layer A method for manufacturing a memory foam pad.