KR101651379B1 - Orthopedic splint having enhanced using convenience - Google Patents

Abstract

The present invention relates to an orthopedic splint having enhanced usage convenience. The orthopedic splint according to the present invention comprises an inner skin, an outer skin, and a hardening core material formed between the inner skin and the outer skin and having a water-hardening resin dipped or coated therein, and a knitted-fabric for constituting the hardening core material is made of a polyolefin-based fiber processed by twisted yarns. Polypropylene can be most preferable selected as the polyolefin-based fiber processed by twisted yarns. Compared to a conventional orthopedic splint, the orthopedic splint according to the present invention has overall improved properties such as wearability, light weight, air permeability, flexibility, processibility, X-ray permeability, environmentally-friendly properties, and non-harmfulness with respect to the human body. In particular, as an orthopedic splint having simultaneously improved light weight and strength, the orthopedic splint provides excellent usability, and has high X-ray permeability, thereby being very convenient for diagnosis and treatment.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an orthopedic splint,

More particularly, the present invention relates to an orthopedic splint using a knitted fabric composed of a polyolefin as a curable core material. The present invention can be applied to orthopedics and other similar fields for the purpose of prescribing the affected part and fixing the body part.

In general, when a fracture or rupture of the ligament is performed, a casting type casting a compression bandage around the affected part is performed. Since the splint must be deformed to conform to the shape of the affected part and then cured, it is initially produced in a form having flexibility, but it is hardened by touching with water according to various curing methods at the time of the procedure. For the hardening, the splint includes a core material impregnated or coated with a hardening resin. The core material occupies most of the volume of the splint, and the splint varies in characteristics depending on the material.

Regarding conventional conventional materials that have been used in the core of splints, fiberglass synthetic knit fabrics developed from the first traditional plaster hardening method called Plaster of Paris are popularly used. However, the use of the above-mentioned glass fiber knitted fabric as a core material is an improved form as compared with conventional plaster, but still has many problems. For example, it is known that dust generated during splint disassembly from the affected area is considered to be a carcinogenic substance and is very harmful to health. The splint with low X-ray transmittance is an orthopedic treatment It becomes a big obstacle to In addition, there is a problem in that the weight or thickness of the splint is excessive, which is inconvenient for wearing, and the processed part cut to the size of the affected part is somewhat sharp at the time of prescription, which may cause scratches or injury.

As a result, these general problems have been solved and the need for more advanced types of splints has been constantly emerging.

Accordingly, the present inventors have found that polyolefine-based fibers, which have recently been introduced in the fields of clothing and textiles and whose application fields are expanding, are made into a core knitted fabric of an orthopedic splint through a false twist yarn process The present invention has been completed based on considerable research and verification.

In the meantime, in the technical field of the present invention, the application of the polyolefin, particularly polypropylene, has been generally considered only as a cotton yarn constituting the inner skin or outer skin of a bandage or splint. However, the inventor of the present invention has confirmed that the polyolefin-based fibers can be improved in the use of the knitted fabric of the splint by the false-twist yarn process, and the most effective denier of the yarn, denier) figures, it is possible to provide new types of splints specifically.

Medical splint (Korean Patent No. 10-0537864)

Disclosure of the Invention The present invention has been conceived to solve the problems of the conventional orthopedic splint described above, and it is an object of the present invention to provide a disposable splint for a splint which is excellent in wearing comfort, light weight, air permeability, stretchability, workability, X-ray permeability, It is the ultimate goal to improve overall characteristics such as sex.

And an object of the present invention is to provide a splint for orthopedic surgery, which is improved in light weight and strength at the same time,

A second object of the present invention is to provide an orthopedic splint using a material harmless to the human body,

A third object of the present invention is to manufacture a splint in a modified form according to the first and second objects, using a practical material so as to economically mass-produce the splint.

In order to achieve the above object, the present invention provides an orthopedic splint with improved ease of use.

The orthopedic splint of the present invention is composed of an inner skin, an outer skin, and a curable core material embedded between the inner skin and the outer skin and impregnated or coated with a water-hardening resin. The knitted fabric constituting the curable core And a polyolefin-based fiber.

Preferably, the polyolefin-based fibers that have been subjected to the preliminary warpage treatment may be selected from the group consisting of polypropylene, polyethylene, polyisobutylene, and the like, more preferably polypropylene (polypropylene) may be selected.

The present invention provides an orthopedic splint with improved overall characteristics such as wearing comfort, light weight, breathability, stretchability, workability, X-ray permeability, environment friendliness, .

Particularly, due to the nature of the material, it is possible to increase the content of the curable resin impregnated per unit thickness or per unit area, thereby providing a splint for orthopedic surgery improved in both light weight and strength,

Because it uses polyolefin material certified as safe in food hygiene law, it provides harmless orthopedic splint to human body,

It also provides a practical splint that can economically mass produce the splint in the improved form.

In addition, the present invention is remarkably light since it has a much smaller specific gravity than the "splice having a core material of a polyester knit fabric" which has recently been proposed as a complement to conventional glass fiber splints, It is possible to increase the production amount by more than half, so that it is possible to reduce the price compared to the production amount, and it is very economical because it can be produced without going through a lot of procedures in various pre- and post-processing processes.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of an orthopedic splint of the present invention including a curable core comprised of a polyolefin woven fabric.
FIG. 2 is a view showing an arrangement of three bars constituted of a raschel knit shape according to an embodiment of the knitted structure constituting the curable core of the present invention.

The present invention provides an orthopedic splint (100) with improved ease of use.

The orthopedic splint 100 of the present invention is characterized in that the splint 100 includes an inner skin 110, an outer skin 120, and a hardenable or non-curable resin, which is embedded between the inner skin 110 and the outer skin 120 and impregnated or coated with a water- And a core material 130. The knitted fabric constituting the curable core material 130 is formed of polyolefin-based fibers that are subjected to a pre-twist yarn process.

Hereinafter, the configuration of the present invention will be described in more detail with reference to the accompanying drawings.

It is to be understood, however, that the scope of the present invention is not limited thereto and that the present invention covers all of the equivalent scope of the following description. The present invention is also referred to as 'orthopedic splint' in the present description, but it is also practically used as 'orthopedic casting', 'support tree', 'support body', 'shielding body' As far as possible, it is not necessarily limited to 'orthopedic splints', but it can also be applied to 'bandage type casts'.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of an orthopedic splint of the present invention including a curable core comprised of a polyolefin woven fabric.

Endothelium and sheath

The endothelial membrane 110 is formed of a hydrophobic material as a portion directly contacting the affected part. Therefore, even if the splint is wetted with water to cure the splint and then applied to the affected part, the skin can be protected from the water by the endothelium 110.

The endothelial membrane 110 may further include an antimicrobial surface layer that is in intimate contact with the affected part. The antimicrobial surface layer may be made of a conventional nonwoven fabric and may contain various antibacterial agents such as arbekacin.

The envelope 120 is formed of a hydrophilic material as a portion in contact with the external environment. A plurality of water holes 121 are formed in the outer skin 120. Water can be quickly impregnated into the curable core material 130 through the water hole 121 during the splint operation, 121), the breathability of the splint is improved.

The hydrophobic material of the inner skin 110, the hydrophilic material of the outer skin 120, and other detailed characteristics are well known in the art, so a detailed description thereof will be omitted.

Hardenable core

The curable core material 130 is embedded between the inner skin 110 and the outer skin 120 and is manufactured by impregnating or coating a constituent knitted fabric with a curable resin.

In the present invention, polyolefin-based fibers are used in the form of a false-twist yarn in place of the glass fiber, nonwoven fabric, or polyester fiber conventionally used for the knitted fabric constituting the curable core member 130, .

A false twist yarn process is one of the process methods used to impart high crimp and stretchability to fibers. When a few yarns of fiber yarn are rotated with respect to the central axis through a spindle, a strong twist in the opposite direction is formed before and after the point, which is commonly referred to as a false state. The fibers in the torn state are fixed by heat treatment and then untwisted in the opposite direction to obtain a small crimp when they are untwisted. The fibers which are imparted with a sense of volume, elasticity and resilience are called twisted yarns. In fact, the elongation percentage of false wares reaches 250 to 400%, the recoverability is close to 100%, and the volume feeling is more than 300% of the yarn.

The typical working range of false wares is known as 50 to 250 denier. We usually use false twist yarns of 100, 150, 250 denier for knit and 50-150 denier for fabric.

The false-twist yarn fiber is now widely used as a material for clothing such as socks, tights, swimwear, and sweaters. However, despite the great advantage that the twist yarn fiber is rich in voluminousness and good in stretchability, there is a concern about the possibility of model degeneration and the weakening of the bearing capacity, and thus it has not been practically used as an orthopedic splint, especially a knitted fabric of a hardened core . The present invention, however, presents an effective solution to the conventional problems, in particular by subjecting the polyolefin-based fibers to a flammable process and using them for the curable core material. That is, it has been confirmed that the physical properties of the polyolefin-based fiber having high strength can overcome the problems caused by the use of the false-twist yarn, which has been pointed out above.

The kind of the false-twist yarn may be any one of a drawn textured yarn (DTY), a producer textured yarn (PTY), and a spin-draw-textured yarn (SDTY) according to the twisting process.

Hereinafter, a knitted fabric structure constituting the curable core material 130 of the present invention will be described with reference to FIG. 2 attached hereto. FIG. 2 is a view showing an arrangement of three bars in a raschel knit form according to one embodiment of the knitted fabric structure.

Bar 1 is a simple chain stitch structure provided to form a plurality of wales and bar 2 is a basic structure of a course provided by lapping movement, ) 3 is the basic structure that replaces bar 1 to form a wale.

The bars are polyolefin-based fibers that are subjected to a false-twist yarn process. In the false-twist yarn process, preferably, yarns of 180 to 400 denier yarns are used in 10 to 60 strands, more preferably 280 to 350 denier yarns 20 to 40 yarns are used in the yarn.

The polyolefin fibers that are subjected to the false-twist yarns are continuously arranged at closely spaced intervals so that a course is provided in a range of preferably 15 or more, and more preferably 17 to 22, per inch of the splint, Is provided in an appropriate amount to form about 270 or more openings per square inch of the knitted fabric surface according to the number of the courses. However, the number of the courses and wales may be changed according to the characteristics to be imparted to the denier and splint of the fiber, and is not necessarily limited to this range.

Preferably, the polyolefin-based fibers that have been subjected to the preliminary warpage treatment may be selected from the group consisting of polypropylene, polyethylene, polyisobutylene, and the like, more preferably polypropylene (polypropylene) may be selected.

The splint of the present invention having the curable core material 130 constituted as described above has an effect of increasing the unit thickness or the intensity per unit area while having a very thin and light weight. The orthopedic splint is required to have a predetermined rigidity, which is attributed to the characteristics of the curable core 130. [ Conventionally, the curable core material 130 is made of a single layer or a multilayer structure, and the lower the rigidity of each layer, the more the layers are stacked in layers. Accordingly, in the case of the curable core material 130 made of conventional glass fiber knitted fabric, it has a multi-layer structure of about 8 layers and has a total thickness of 5 mm to 15 mm. However, in this case, there is a disadvantage that the feeling of fit and breathability are reduced due to the excessively thick thickness and the fitting feeling is poor due to easy lifting after the procedure.

The curable core 130 constituting the splice of the present invention can also be formed into a single layer or a multi-layer structure as in a conventional manner, but preferably a thickness ranging from 1 mm to 6 mm (0.1 to 0.6 cm) , It is possible to have a strength comparable to or higher than that of the conventional one only by the above thickness. This is because the twist yarn structure of the fibers allows a larger amount of resin to be impregnated in the same area, and is also a property resulting from the rigidity of the polyolefin-based fiber itself. Therefore, the orthopedic splint of the present invention has a thickness reduction ratio of about 30 to 60%, and has the same or better strength than the conventional one.

The specific gravity of the curable core material 130 is preferably 0.03 to 0.6, more preferably 0.03 to 0.4.

In addition, the splint of the present invention having the curable core material 130 constituted as described above has the characteristic that the X-ray permeability also increases. In the case of a splice made of conventional glass fiber, shading is often caused by shining the X-ray. However, when the polyolefin-based fiber is used as the splice of the present invention, the X-ray transmittance is significantly It is very convenient to know the bony bonding and recovery progress without dismantling the cast at the time of treatment.

The hydrocyclization resin to be impregnated or coated with the curable core material 130 of the splint 100 of the present invention is not limited to any one type but is preferably a polyurethane prepolymer composition having high storage stability and high curing efficiency Do. The preparation of the polyurethane prepolymer composition is carried out according to an ordinary procedure in the art and is not limited to any one method. For example, a mixture of polyisocyanate and polyether polyol is reacted at 30 to 120 ° C for 1 to 10 hours Can be obtained.

The splint of the present invention may contain at least one of a hydroscopic catalyst, a filler, a polymer, a reinforcing agent, a drying agent, a binder, an antifoaming agent, a lubricant, a slip agent, a stabilizer, a defoamer, an adhesion promoter, an antioxidant, a filler, In particular, when the ceramic powder is contained in an amount of 10 to 20% by weight based on the total weight of the composition, the far infrared ray which is beneficial to the human body is released, and the therapeutic effect can be enhanced, which is more effective.

When the splint is distributed and stored, it is sealed in a sealed container such as a packaging material capable of blocking air and moisture, for example, an aluminum bag, and is kept in a sealed state.

When the splint is applied, a splint is placed on the affected part, and a high-resisting bandage is wound underwrap or overwrap according to the fracture and prescription to complete the cast.

The total thickness of the orthopedic splint of the present invention ranges from 0.3 to 1.5 cm, the width ranges from 5 to 20 cm, and the splint can be suitably cut according to the position and size of the affected part.

Hereinafter, Test Examples 1 to 4 relating to the effects of the present invention will be described. For the test, the orthopedic splints shown in the following Production Examples 1 to 3 and Comparative Example 1 were used.

The following Test Examples 1 to 4 correspond to the test examples relating to the effects of the present invention, and the scope and effect of the present invention are not limited thereto.

[Production Examples 1 to 3]

Three orthopedic splints of the present invention were produced according to the following methods, and referred to as Production Example 1, Production Example 2, and Production Example 3, respectively.

A hydrophobic polypropylene nonwoven fabric (manufactured by Sechang Co., Ltd.) of 300 g / m ² was used for the inner skin 110 of the splint. The water-hardenable core member 130 was uniformly impregnated with a curing material (NC-300, T & L CO., LTD.) To a knitted fabric of five layers of hydrophilic polypropylene fibers (300 deniers, 25 strands) . A hydrophilic polypropylene nonwoven fabric (manufactured by Sechang Co., Ltd.) having a density of 180 g / m ² was used as the sheath 120.

 [Comparative Example 1]

As a comparative example 1, Agma sprint [4 inch], which is a commercially available splint for orthopedic surgery, was used.

[Test Example 1]

Production Example 1 Production Example 2 Production Example 3 Comparative Example 1 Width (cm) 10.8 10.7 10.7 10.8 Thickness (cm) 0.51 0.54 0.52 0.59 Breaking strength (Mpa) 390.1 495.1 445.1 125.1

Table 1 shows the fracture strength of the orthopedic splint shown in Production Examples 1 to 3 and Comparative Example 1 by the method of ASTM D-638. Breaking strength refers to the maximum stress at which a material breaks.

The fracture strengths of Preparation Examples 1 to 3 are in the range of about 390 to 500 MPa, and when compared with the conventional splice (breaking strength: 125.1 MPa) shown in Comparative Example 1, It can be confirmed that it has strength.

[Test Example 2]

Production Example 1 Production Example 2 Production Example 3 Comparative Example 1 Width (cm) 10.8 10.7 10.7 10.8 Thickness (cm) 0.51 0.54 0.52 0.59 Specific gravity (g / cm3) 0.21 0.30 0.26 0.55

Table 2 shows the results of measuring the specific gravity of the curable core material constituting the orthopedic splint shown in Production Examples 1 to 3 and Comparative Example 1 by the method of ASTM D-792. The specific gravity of each of Production Examples 1 to 3 was 0.21 to 0.30, and the splint of the present invention showed a reduction in specific gravity of about 40 to 50% as compared with the splint shown in Comparative Example 1. As a result, It can be confirmed that it can be manufactured.

[Test Example 3]

Production Example 1 Production Example 2 Production Example 3 Comparative Example 1 Width (cm) 10.8 10.7 10.7 10.8 Thickness (cm) 0.51 0.54 0.52 0.59 Maximum load (kgf) 13.2 12.9 12.3 10.2 Flexural Strength (Mpa) 139.1 132.0 136.0 106.1

Table 3 above shows the results of measuring the flexural strength of the orthopedic splints shown in Production Examples 1 to 3 and Comparative Example 1 by the method of ASTM D790-86. Flexural strength refers to the resistance that the material can withstand without breaking when bent.

The flexural strengths of Preparation Examples 1 to 3 correspond to a range of about 130 to 140 MPa. That is, the splint of the present invention has a significantly higher flexural strength than the flexural strength of 106.1 MPa of the splint shown in Comparative Example 1, so that it is possible to provide an excellent fitting feeling with good folding hingeability , And can be compressed and stored in a smaller volume even when stored in a sealed state, thus being efficient.

[Test Example 4]

Production Example 1 Production Example 2 Production Example 3 Comparative Example 1 Width (cm) 10.8 10.7 10.7 10.8 Thickness (cm) 0.31 0.34 0.32 0.35 X-ray permeability evaluation 5 4 5 3

Table 4 above shows X-ray transmittance of each of Preparative Examples 1 to 3 and Comparative Example 1 by irradiating X-rays of 20 to 80 keV and comparing the X-ray images projected on a flat plate. The criteria of evaluation were evaluated with respect to the sharpness of the X-ray image by 1 to 5 points according to the ease of use in orthopedic treatment applications in the art, and the total score of the evaluation for each preparation example and Comparative example 1 Are shown in Table 4. < tb > < TABLE >

Referring to the evaluation results of Table 4, the X-ray transmittance of Comparative Example 1 was 3, and the X-ray transmittance of the Preparation Examples 1 to 3 was evaluated to be 4 to 5, It can be confirmed that it has improved X-ray permeability.

100: splint
110:
120: envelope
121: water hole
130: Curable core

Claims (12)

In an orthopedic splint improved in X-ray permeability composed of an endothelium, an outer skin, and a curable core interposed therebetween and impregnated or coated with a hydrated resin,
Wherein the knitted fabric constituting the curable core is made of a polyolefin-based fiber, and the false-twisted polyolefin-based fiber is a polyolefin-based fiber having an X value of 280 to 350 denier fibers twisted with 20 to 40 strands An orthopedic splint with improved line permeability,
Wherein the orthopedic splint has a breaking strength of 390 to 500 MPa and a flexural strength of 130 to 140 MPa.
The method according to claim 1,
Wherein the false-twist polyolefin-based fiber is one selected from the group consisting of polypropylene, polyethylene, polyisobutylene, and combinations thereof, and an orthopedic splint having improved X- .
The method according to claim 1,
Wherein the false-twist polyolefin-based fiber is polypropylene.
The method according to claim 1,
An orthopedic splint having improved X-ray permeability, characterized in that the water-curable resin impregnated or coated is a polyurethane prepolymer composition.
delete delete The method according to claim 1,
Wherein the curable core material has a single layer or a multi-layer structure.
The method according to claim 1,
Wherein the orthopedic splint has a thickness of 0.3 to 1.5 cm and a width of 5 to 20 cm.
delete delete The method according to claim 1,
Wherein the specific gravity of the curable core material of the orthopedic splint is 0.21 to 0.30 g / cm < 3 >.
The method according to claim 1,
The orthopedic splint comprises a hydroscopic catalyst, filler, polymer, enhancer, desiccant, binder, defoamer, lubricant, slip agent, stabilizer, defoamer, tackifier, antioxidant, filler, colorant, perfume and combinations thereof Wherein the X-ray diffraction intensity of the X-ray diffraction peak is higher than the X-ray diffraction intensity of the X-ray diffraction spectrum.

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