JP4503221B2 - Core material for body fixing device and body fixing device using the same - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention is a lightweight and easy-to-cut body fixing core material and a good fit to the body using the same, hygienic and non-responsive to metal sensitive devices. The present invention relates to a body fixing tool such as a corset, splint, and supporter that does not need to be removed during photographing and can be incinerated after use.
[0002]
[Prior art]
Conventionally, a cast cast using plaster has been used for fixing a fractured part in orthopedics or the like. However, since it is made of gypsum, it is heavy and has a heavy burden on the patient's bones, and it suffers from inconveniences such as stuffiness and rash due to poor ventilation.
Therefore, the method of fixing the affected area with splints has been adopted, but wooden and metal plates are not flexible at all. For example, if the finger is fixed from the base of the finger, the joint in the middle of the finger is moved. Because it was difficult to move the joints that were not fractured, it was very inconvenient. In addition, the air permeability has been improved, but it is still not enough.
[0003]
In order to eliminate these disadvantages, as a splint, a material made of a flexible material such as foam on the outside and a metal as a core material was developed (Japanese Utility Model Publication No. 58-4485, Japanese Patent Application Laid-Open No. 9-271383), This prevented stuffiness and improved fit to the body. However, the splint was cut to shorten the length or the width depending on the healing process of the affected part, but there were inconveniences such as difficulty in cutting because it contained metal. In addition, the splints had to be removed once during X-ray photography.
[0004]
On the other hand, a correction underwear or corset having a body correction / shaping function has a core inserted in order to maintain its shape. Conventionally, metals such as shape memory alloys have been used (Japanese Patent Laid-Open No. 2000-160407), but there have been inconveniences such as reacting to a metal detector during the inspection of metallic foreign matter.
[0005]
In addition, it is known that various plastic film-like core materials are used as lightweight, but because the shape retainability is not sufficient, they may bend or bend when twisted by washing. The body holding function cannot be secured sufficiently. Further, when forming the corset, there are problems such as being unable to follow the complex curve of the body and providing a space for inserting the core.
[0006]
[Problems to be solved by the invention]
It is an object of the present invention to have a required shape retaining property as a body fixing tool, moderate rigidity, light weight, easy cutting, no response to a measuring device that senses metal, and a body An object of the present invention is to obtain a core material for body fixing device and a body fixing device suitable for medical use or clothing that have good fit and breathability and are easy to handle.
[0007]
[Means for Solving the Problems]
That is, the present invention comprises a core material for body fixing devices comprising a long shape-retaining material formed by bundling five or more thermoplastic resin wires having a return angle of 90 degrees or less by bending at 90 degrees in parallel. And a body fixing device using the same.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Thermoplastic resin wire The thermoplastic resin wire according to the present invention is usually a continuous body obtained by further stretching a molded product obtained by extruding a thermoplastic resin 2 to 30 times. The cross-sectional shape of the thermoplastic resin wire is not only circular, but also semi-circular, elliptical, oval, triangular, quadrangular, pentagonal, hexagonal, and other trapezoidal, L-shaped, corrugated, array-shaped, It may be an irregular shape such as a star shape or a gear shape. Also, the wire rod may be provided with arbitrary projections, for example, those in which fine fibers are branched from a thread shape to a feather shape, or those in which projections are scattered on the surface of the fibrous material. May be. Further, one or more grooves or streaks may be provided in the longitudinal direction. In addition, the thickness of the thermoplastic resin wire can be appropriately selected depending on the application, but usually the diameter or the maximum thickness is 0.1 to 50 mm, preferably 0.2 to 10 mm.
[0009]
The thermoplastic resin wire according to the present invention has a return angle by bending at 90 degrees of 20 degrees or less, preferably 15 degrees or less, more preferably 10 degrees or less. If the return angle by 90-degree bending exceeds 20 degrees, the shape retainability may be inferior. Here, in the case of a thread-like shape, the return angle θ shown in FIG. 1B when bent for 90 minutes and left to stand for 5 minutes as shown in FIG.
[0010]
As a raw material of the thermoplastic resin wire, various known thermoplastic resins such as polyolefin (polyethylene, polypropylene, poly-4-methyl / 1-pentene, polybutene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate) are used. Phthalate, wholly aromatic polyester, etc.), polyamide (nylon-6, nylon-66, polymetaxylene adipamide, aromatic polyamide, etc.), polyphenylene oxide, polyphenylene sulfide, or a blend of two or more of these resins. is there. Among these, polyethylene, polypropylene, polyethylene terephthalate, and polyamide are preferable because a thermoplastic resin wire having excellent stretchability and good rigidity can be obtained. Such raw material can be appropriately selected according to the application. In addition, when used for splints for parts that do not require much strength such as fingers, or those that require a certain degree of flexibility, such as corset core materials, ethylene homopolymers or ethylene-α-olefin copolymers, etc. It is preferable to use polyethylene. In this case, preferably a density of 950 kg / m ³ or more, particularly preferably 955~970kg / m ^3, more preferably 960~970kg / m ^3, a molecular weight distribution based on gel permeation chromatography (GPC) (weight average molecular weight (Mw) / (Mn)) is 5 to 15, preferably 6 to 14, and high-density polyethylene having an α-olefin content of 3 to 6 carbon atoms of less than 2%, preferably 0.05 to 1.5% by weight. Moreover, it is preferable to use a strong material such as polyethylene terephthalate for the splint to the portion requiring strength, for example, the splint used for the buttock.
[0011]
Production method of thermoplastic resin wire material The thermoplastic resin wire material according to the present invention is produced by producing a raw yarn of a desired shape from a thermoplastic resin by melt molding and then drawing it by applying heat. Can be manufactured. As the stretching temperature, a temperature suitable for stretching to such an extent that plastic deformability and shape retention can be exhibited is appropriately selected depending on the thermoplastic resin used, and is usually performed at a temperature lower than the melting point of the thermoplastic resin used. For example, when the raw material is polyethylene, the temperature is 100 ° C, preferably 85 to 100 ° C. The draw ratio varies slightly depending on the properties of the raw yarn and the draw temperature, but is selected within a range where plastic deformability can be expressed, and is usually in a range where the yield point is greater than or equal to the break point, and is preferably 2 to 30 times. Is about 7 to 15 times. If the draw ratio is insufficient, a thermoplastic resin wire having a return angle of 20 degrees or less by bending at 90 degrees cannot be obtained, and the plastic deformability and shape retention are not satisfactory.
[0012]
The thermoplastic resin wire according to the present invention can be blended with various additives as long as the object of the present invention is not impaired. Examples of such additives include processing aids, color pigments, antistatic agents, inorganic fillers, and the like. More specifically, low molecular weight polyolefin as a processing aid, alicyclic polyolefin, synthetic oil having a carboxyl group, hydroxyl group, etc., mineral oil, wax made of vegetable oil such as carnauba wax, titanium oxide, zinc oxide, calcium carbide, Examples thereof include coloring pigments such as barium sulfate and silica, inorganic fillers, and antistatic agents composed of various types of surfactants. If these are waxes or antistatic agents, for example, 5 wt% or less, preferably 1 wt% or less, or if they are color pigments or inorganic fillers, for example, 10 wt% or less, preferably 5 wt%. Each of them can be blended at a ratio of% or less. The addition of waxes is effective to increase the dimensional accuracy in melt forming and drawing of the raw yarn, and the addition of color pigments and inorganic fillers has the effect of plastic deformation and shape retention in addition to coloring and increasing effects. May contribute to improvement.
[0013]
Shape-retaining long object The shape-retaining long object according to the present invention is formed by bundling at least one or more of the above-mentioned at least one thermoplastic resin wire in parallel. The number of thermoplastic resin wires to be bound may be bundled according to the purpose, but it is usually 5 to 500, and a shape-retaining long material is made from a long material having different thicknesses and shapes. May be. Moreover, you may mix the thermoplastic resin wire materials from which a resin material differs. Furthermore, if necessary, other wires that do not exhibit shape retention can be bound to the extent that performance is not impaired. Also, a plurality of long shape-retaining materials may be prepared and arranged in parallel and further bound. The arrangement direction can be the width direction or can be stacked. With this bundling, the shape-retaining long object can be made into a wide band, or the cross-section is circular, semi-circular, elliptical, elliptical, triangular, quadrilateral, pentagonal, hexagonal, etc., trapezoid, An irregular shape such as an L shape, a waveform, an array shape, a star shape, or a gear shape may be used. The direction of arrangement can be appropriately selected according to the application. For example, when holding a wide part of the body, if the thickness is reduced and the width is increased, the width of the body is flexible, so that it can be curved in accordance with the shape of the body.
[0014]
For binding, a plurality of thermoplastic resin wires may be integrated, and may be fused by heat or joined by an adhesive or the like. In this case, if necessary, it is possible to join by coating a thermoplastic resin having a low melting point or by forming a core-sheath structure. In some cases, it can be freely bound with other fibers. The interval between the parts to be joined and the bundled parts may be determined appropriately according to the application.For example, if it is desired to have air permeability, the number of places to be joined is reduced so that a plurality of thermoplastic resin wires arranged in parallel increase each other's space. You can do it.
[0015]
Core material for body fixing device The core material for body fixing device of the present invention is made of the shape-retaining long material, and the shape-retaining long material can be used as a core material as it is. A plurality of retentive long objects can be bundled as necessary to form a core material. In this case, the long shape-retaining material may be wrapped with another substance. By doing so, it is possible to prevent the shape-retaining long object from popping out to the outside or unbundling due to wear of the binding portion. As the material to be wrapped, paper, knitted fabric, woven fabric, nonwoven fabric, net, film, foam, and the like can be used, and can be appropriately selected depending on the application and purpose.
The film is preferably a perforated film in consideration of air permeability.
[0016]
Body fixing tool The body fixing tool of the present invention uses the core material for body fixing tool. In the body fixing device of the present invention, the core material for body fixing device may be used as it is, but the outside of the core material for body fixing device may be covered with another substance or may be provided with a layer. Examples of such a layer include a moisture permeable layer, a breathable coating layer, a shock absorbing layer, and a surface protective layer. For example, cotton and rayon are used as the moisture permeable layer, a perforated film is used as the breathable coating layer, a foam is used as the shock absorbing layer, and a waterproof and antifouling film is used as the surface protective layer. . According to various uses, a single layer or a plurality of layers can be provided as appropriate. This can be a body fixing device such as a corset or a supporter that fixes the movable part of the injured body such as fingers, hands, arms, legs, legs, cervical vertebrae, lumbar vertebrae, spine, shoulders, outer ear, nose, chin, etc. It can be used as a body fixing tool such as a splint for fixing and supporting in the case of fracture. It can also be used as a body fixing tool such as a core material for correction underwear such as corset and girdle for body shape correction and shaping.
[0017]
【Example】
Hereinafter, an embodiment of the embodiment will be described. However, the present invention is not limited by these embodiments.
The thermoplastic resin wires used in Examples 1 to 3 were formed as follows.
An ethylene-propylene copolymer containing 0.15% by weight polypropylene as a comonomer (comonomer content is measured by NMR, MFR measured by ASTM D1238 is 0.35 g / 10 min, measured by gel permeation chromatography (GPC). Mw / Mn calculated from the weight average molecular weight (Mw) and the number average molecular weight (Mn) is 9, the density measured by ASTM D1505 is 964 kg / m ³ ) (A) 50 parts by weight and calcium carbonate 50 parts by weight A master batch (B) was prepared, and the resin mixed at a ratio of (A) / (B) = 96/4 was melt-spun under the following conditions, and stretched in the machine direction at a stretch ratio of 12 times.
Extruder: 30 mmφ (L / D = 28, compression ratio 2.3)
Die opening: 30mm x 3.6mm
Molding temperature (cylinder and die): 290 ° C
Cooling tank: 1400mm
Take-off speed: 4 m / min Stretch tank: 95 ° C. water tank (length 1700 mm)
Annealing bath: 140 ° C electric heating oven (length: 2000 mm)
Winding speed: 52 m / min. The diameter (maximum thickness) of the obtained thermoplastic resin wire is measured with a caliper, and the return angle θ after being held for 5 minutes after being bent at 90 ° by the method shown in FIG. It was measured. The thickness was 0.70 mm, and the 90 ° bending return angle was 8 °.
[0018]
Example 1
Ten of the above thermoplastic resin wires were bound at 10 mm intervals with polyester fibers, and the two bundles were bound in parallel. Three of the two bundles were further bundled in parallel to obtain a long shape-retaining material having a width of 15 mm and a thickness of 2.5 mm. A plain weave mesh made of polyester fiber was wrapped around the long shape-retaining material and completely covered. Further, in order to integrate the shape-retaining long body and the net-like material, a body fixture was produced by sewing in the longitudinal direction with a polyester fiber. This was cut into a length of about 300 mm with a scissors and folded in half. The damaged thumb was sandwiched from above and below, deformed according to the indirect angle of the thumb, and then wrapped with tape and bandages from the fingertip of the thumb to the wrist.
Since such a body fixing tool does not contain metal, it can be cut with a scissors according to the length of the finger, folded in half, or bent according to the shape of the thumb. The feeling of wearing fits the unevenness and roundness of the fingers, and since it is breathable, it does not stuffy and can be moved from an undamaged palm to the wrist.
[0019]
Example 2
Twenty of the above thermoplastic resin wires were bundled with a polyester fiber at an interval of 10 mm to obtain a long shape-retaining material. A plurality of these shape-retaining long articles were arranged in parallel in the width direction, and were bound with polyester fibers to form a long shape having a width of 50 mm. Two layers of this were stacked in the thickness direction and bound with polyester fiber, and cut into a length of 450 mm to obtain a core material for a body fixing tool.
The core material for body fixing devices was integrated by being sandwiched between two shock absorbing materials made of two polyurethane foams having a length of 500 mm × width of 60 mm and thicknesses of 10 mm and 5 mm, respectively. Furthermore, the surface was covered with a moisture-permeable cotton fabric to obtain a body fixing tool.
With the body fixing as a splint, the elbow was bent and applied from the elbow to the arm and wrapped with a bandage. By applying a little force, the curve can be shaped to match the curve of the elbow, so it fits the body and can be firmly fixed. Because it is breathable, it does not stuffy and is lightweight, so even if it is worn for a long time, there is no feeling of fatigue and the burden on the patient is small.
[0020]
Example 3
The above eight thermoplastic resin wires are arranged so that the cross section is substantially long, and the whole body is spirally wound with polyester fibers and bound to form a body fixing member having a length of 150 mm and a width of 30 mm. . This was arranged in the center of gravity at four locations on the back of the corset fabric for the waist and sewed together with the fabric.
I wore it on my hips, bent forward, bent back, folded my hips left and right, but it was fit and I didn't get stuffy. It was lightweight and easy to carry, and did not lose its shape even after washing.
[0021]
【The invention's effect】
Since the core material for body fixing device of the present invention is composed of a shape-retaining long material obtained by bundling thermoplastic resin wires whose return angle by 90-degree bending is 20 degrees or less, it has an appropriate rigidity. In addition, it is fit and breathable to the body, and does not react to devices that sense metal, and is easy to handle. Therefore, taking advantage of such characteristics, the core material for the body fixing device can be suitably used for various body fixing devices such as medical devices such as corsets, splints, supporters, and clothing such as corsets, girdles, and bras. it can. Moreover, such a body fixing tool is hygienic, lightweight, can be used even if it is cut as necessary, and can be incinerated after use.
[Brief description of the drawings]
FIG. 1 is a drawing showing a return angle after bending by 90 degrees.

Claims (4)

A core material for body fixing device, comprising a shape-retaining long material formed by bundling at least 5 or more of thermoplastic resin wires having a return angle of 20 degrees or less by bending at 90 degrees in parallel with fibers .   The core material for body fixing tools according to claim 1, wherein the diameter or maximum thickness of the thermoplastic resin wire is in the range of 0.1 to 50 mm.   The core material for body fixing tools according to claim 1 or 2, wherein a plurality of shape-retaining long objects are combined.   A body fixing device comprising at least one of a moisture permeable layer, a breathable coating layer, a shock absorbing layer, and a surface protective layer around the core material for body fixing device according to claim 1. .

Images