JPS60203261A - Surgical medical auxiliary material and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surgical medical auxiliary material used in surgical medical treatment, more specifically, a surgical medical auxiliary material that has plasticity at a temperature of 60° C. or higher,
The present invention relates to surgical medical auxiliary materials that are rigid at room temperature and are particularly used as surgical medical auxiliary materials such as casts and bandages.

Traditionally, in surgery, especially in orthopedics, surgical materials such as plaster materials used for the treatment of fractures and limb correction have mainly been made of surgical materials known as plaster of Paris casts. There is.

Plaster of Paris plaster is made by mixing water with a composition of Plaster of Paris and melamine/formaldehyde resin, and applying this semi-liquid material to a bandaged limb or the like and allowing it to harden.

In such calcined plaster casts, calcined plaster is mixed with water, but this condition gives an extremely dirty feeling, and furthermore, it takes time and effort to knead the calcined plaster, and the amount of water added is limited. It has the disadvantage that it requires some degree of control, etc.

Also, when applied to the skin, whether or not a bandage is applied, it causes discomfort to the skin, takes a long time to harden, forces the patient to remain quiet during this time, and furthermore, during demolding. generates dust and requires time and effort.

In addition, when applied to the skin, it has disadvantages such as not staining clothes and irritating the skin, and after curing, it is heavy, does not transmit X-rays, and even comes into contact with hot water during bathing. There were various drawbacks such as the fact that it should not be allowed.

Furthermore, the plaster cast mentioned above does not itself have any medicinal properties, but merely has the effect of fixing and protecting the affected area, and as mentioned above, it irritates the skin, so it is not suitable for the affected area. It also has the disadvantages of making the skin rough and promoting inflammation in the affected area.

The present invention has been made in view of the above points, and can be easily and effortlessly applied to the affected area without requiring any special preparations, is aesthetically pleasing, and does not irritate the skin when worn on the skin. Casts, bandages, etc. that can be easily removed without the need for
It is an object of the present invention to provide surgical medical auxiliary materials such as parts for correcting limbs and fingers, splints, etc., and also to provide a method for easily manufacturing the surgical treatment auxiliary materials.

Therefore, the composition for surgical medical auxiliary materials according to the present invention,
Synthetic trans 1,4 polyisoprene 1.0 parts by weight, ethylene-vinyl acetate J (polymer or polyester resin in which vinyl chloride is grafted onto a polymer)
It is characterized in that a compound layer containing 70 parts by weight is formed on both surfaces of the substance.

Further, the method for producing surgical medical auxiliary materials according to the present invention includes: 100 parts by weight of synthetic trans-1,4 polyisoprene;
It is characterized by immersing the object in a blend solution containing 5 to 70 parts by weight of a polymer or polyester resin obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer, and then drying it.

Furthermore, a second method for producing surgical medical auxiliary materials according to the present invention is to prepare a polymer or polyester resin in which vinyl chloride is graft-polymerized to an ethylene-vinyl acetate copolymer to 100 parts by weight of synthetic trans 1.4 polyisoprene. ~7
It is characterized in that a compound containing 0 parts by weight is attached to both surfaces of the object.

According to the present invention, since it has the property of becoming plastic at a temperature of 60°C or higher and solidifying at a high temperature, it cannot be kneaded or
It has the advantage that surgical medical auxiliary materials can be easily attached by simply thermoplasticizing it and attaching it to the affected area without applying it or requiring any preparation, which is extremely advantageous in surgical treatment. Furthermore, in order to correct the wearing condition of the affected area, it is only necessary to thermoplasticize and shape the correction part, so there is an advantage that corrections that were previously impossible can be easily made.

Further, since the surgical medical accessory material according to the present invention has a plastic deformation temperature of 60 to 100°C, it can be placed in a bathtub (approximately 40"C) while wearing it. Since the auxiliary material is transparent to X-rays, it has the advantage that X-rays can be taken while the surgical medical auxiliary material is attached.

In addition, the surgical medical auxiliary material according to the present invention can be easily demolded by thermoplastic deformation of the auxiliary material, and there is no risk of generating dust, etc., and there is no irritation to the skin, making it easy to wear. It has a considerable practical advantage of not causing discomfort.

Furthermore, the method for producing surgical medical auxiliary materials according to the present invention has the advantage that it can be produced easily and continuously because the material is immersed in a compound solution and dried. Moreover, in the second method for packing surgical medical auxiliary materials according to the present invention,
It has the advantage that magnetic powder or anti-inflammatory agent can be kneaded easily and with a good yield.

The present invention will be explained in more detail below.

The main composition of the surgical medical accessory material according to the present invention uses synthetic trans-1,4 polyisoprene as the main component, as described above.

Although this synthetic trans-1.4 polyisoprene is almost crystalline and has a softening point of around 55°C, it cannot be used as it is as an auxiliary surgical material as described above.

Therefore, by adding a polymer or polyester resin obtained by graft polymerizing vinyl chloride to ethylene-vinyl acetate-1 to such synthetic trans-1.4 polyisoprene, the softening point of the composition can be lowered to a level suitable for use as a surgical medical accessory material. It is suitable for compositions, does not reduce its rigidity at room temperature, does not stick to hands when heated and softened, has good workability, and can be freely molded.

The amount of the ethylene-vinyl acetate copolymer graft-polymerized with vinyl chloride or the polyester resin is 5 to 70 parts by weight per 100 parts by weight of the synthetic trans 1.4 polyisoprene.

In particular, when using a polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer, it is preferable to add 5 to 50 parts by weight, and when adding a polyester resin, 20 to 70 parts by weight is added. It is better. When adding a polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer, the amount of the polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer is less than 5 parts by weight. After softening, it takes a long time to harden at room temperature, resulting in too much self-adhesiveness and significantly lower workability.On the other hand, if more than 50 parts by weight is added, the curing time becomes too fast to be practical. It disappears.

Furthermore, when adding a polyester resin, if the polyester resin is less than 20 M parts, it will harden too quickly, impairing workability, while if it is added in an amount exceeding 70 parts by weight, the curing time will be too slow (too much). This is because it becomes impractical.

As is clear from the above description, when adding a polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer, it can be used particularly as a relatively thick surgical medical accessory material such as a plaster cast. When the polyester resin is added, it is used when the composition is used in place of a relatively thin surgical medical material, such as a bandage. The curing time is delayed so that the curing takes place within a predetermined curing time, taking operational considerations into account.

As the above-mentioned polyester resin, it is preferable to use a resin made into a polyester by ring-opening polymerization of a lactone (eg, ε-caprolactone) monomer, which is an intramolecular ester. The reason for this is that it is a thermoplastic resin with a melting point of 60° C. or lower and has a relatively slow crystallization rate.

The molecular weight of such polyester resin is preferably from 10,000 to 100,000. When the molecular weight is less than 10,000, heat,
It is too sensitive to temperature and the crystalline portion melts rapidly, softening the resin, resulting in a rapid drop in viscosity and poor workability.Also, when the molecular weight exceeds 100,000, the crystallization speed is very slow and it hardens. This is because it takes too much time and reduces workability.

In the present invention, magnetic powder and/or anti-inflammatory agents can be added to such formulations.

The magnetic powder added in the present invention is basically not limited. For example, one or more types of magnetic ferrite powder, alnico magnetic powder, rare earth cobalt magnetic powder, etc. can be used.

Furthermore, the average particle size of the magnetic powder is preferably 200 to 400.
It is better to be messy. If it is less than 200 mesoshu, it will not adhere well to the skin, and if it exceeds 400 mesosyus, the cost will be high and it cannot be put to practical use.

Furthermore, the preferred magnetic force for magnetic therapy is 800 to 1500.
Since the magnetic powder is Gaussian, the amount of the magnetic powder added is 50 to 100 parts by weight to achieve this magnetic force range. 50ffZl
If it is less than part f, the magnetic force will be too small and the magnetic therapeutic effect will be too weak, while if it exceeds 400 parts by weight, it will be difficult to mix into a formulation.

The anti-inflammatory agent added together with the above-mentioned magnetic powder or alone is not fundamentally limited in the present invention.

For example, one or more of methyl salicylate, menthol, camphor, thymol, funnel extract, ethylene glycol salicylate, etc. can be used.

The amount of anti-inflammatory agent added is preferably 1 to 10 parts by weight. If the amount of anti-inflammatory agent added is less than 1 part by weight, the anti-inflammatory effect may not be fully exerted, while if it exceeds 10 parts by weight, there is a risk of strong skin irritation and irritation. It is.

Various auxiliary ingredients can be added to the formulation of the surgical medical auxiliary material according to the invention.

For example, fillers such as white carbon, talc, and clay, colorants such as titanium oxide, and anti-aging agents can be added.

The surgical medical auxiliary material according to the present invention is formed by forming such a compound on both sides of a heavy body, but the material is not fundamentally limited to this type, and may include, for example, non-woven fabric, woven fabric,
It may be either knitted or woven fabric. The material is not limited; for example, it may be made of natural fibers such as cotton cloth or pure blanket;
It can be a tangible material made of synthetic fibers such as nylon.

Next, a method for producing surgical medical auxiliary materials according to the present invention will be explained.

First, a formulation as described above is dissolved in a solvent to form a formulation solution.

Any solvent may be used as such a solvent as long as it does not react with the compound and effectively dissolves the compound. For example, one or more of toluene, Hensen, carbon tetrachloride, trichloroethine, chloroborum, etc. can be used.

The aforementioned solvent is preferably used in an amount of 4 to 100 g of said formulation.
Add 0-300 cc. If it is less than 40 cc, the viscosity is too high and the material cannot be immersed uniformly.
On the other hand, if it exceeds 0.00 cc, the solution will be too thin and a sufficient blend layer will not be formed.

The temperature of such an immersion bath is preferably between 0 and 40°C. If the temperature is below 0°C, the viscosity of the solution may become high and the material may not be immersed uniformly, and
This is because if the temperature exceeds 40°C, there will be a problem that evaporation of the solvent will increase, making it difficult to adjust the concentration. ``This immersion time is preferably 5 to 30 seconds. If the soaking time is less than 5 seconds, it will be difficult to produce a sufficient blend layer, while if the soaking time exceeds 30 seconds, no further blend solution will adhere to the material.

The amount of the compound applied to the body immersed in such a dipping bath is preferably 200 to 4000 g/rd, and if it is less than 200 i10f, a sufficiently thick compound layer will be formed. On the other hand, if it exceeds 4000 g/d, it will be difficult to produce a uniform thickness and it will be difficult to make the surface smooth.

After arbitrarily scraping off the excess of the compound solution on the heavy body immersed in the compound solution as described above using a roll or the like,
Dry and splatter the solvent to form a formulation layer on both sides of the body.

The drying temperature as mentioned above is preferably 50 to 80°C. If the temperature is less than 50°C, it will take too much time to remove the solvent, while if it exceeds 80°C, the compound layer will become soft, which may complicate the manufacturing process.

Further, the drying time is preferably 3 to 30 minutes. If the drying time is less than 3 minutes, the drying time may not be sufficient and there is a risk that the solvent may remain. On the other hand, if the drying time is longer than 30 minutes, the solvent will have been completely removed, making it uneconomical. It is.

The second method of manufacturing a surgical treatment accessory material according to the present invention involves laminating a compound on both sides of the above-mentioned material.

The above-mentioned lamination method is basically not limited;
For example, bonding may be performed using an adhesive, or the compound may be heated to 60 to 100° C. to plasticize it, and a heavy body may be bonded to the plasticized compound layer.

This method of manufacturing surgical treatment auxiliary materials by pasting has the advantage that it is possible to provide surgical treatment auxiliary materials with a thick compound layer, unlike the first method of using M according to the present invention described above.

In addition, when mixing magnetic powder and/or an anti-inflammatory agent into the compound layer, the magnetic powder and/or anti-inflammatory agent may be mixed into the compound beforehand.
Alternatively, since it is sufficient to add a predetermined amount of an anti-inflammatory agent, it is particularly useful for producing surgical treatment auxiliary materials mixed with magnetic powder and/or an anti-inflammatory agent as described above.

The present invention will be explained in detail below.

EXAMPLE A surgical medical accessory composition as shown below was prepared as shown below.

Composition synthetic transformer 1.4 polyisoprene 100 heavy fit
Department (Clarei Soprene Chemical Co., Ltd.) Sumigraph) GFL (Sumiman Chemical Co., Ltd.) 40mffi
Jirton A (Mizusawa Chemical Co., Ltd.) 7 Offl parts Titanium oxide 10 parts Stearic acid 2 parts Crank 200 (Ouchi Shinko Kagaku Co., Ltd.) 2 parts Methyl salicylate (Sanei Chemical 1m) 2ffim parts Menthol (Takasago Fragrance 91) 1 weight 1 part camphor 1 part by weight The composition as described above is kneaded using a roll, banbury or niegu, and then fed to an inverted calender and pasted onto one side of a heavy body. Calendar temperature is 90-100
It is necessary to sufficiently plasticize the material at ℃.

Furthermore, in order to bond to another surface, the material bonded to one side may be rolled up and placed in a calendar again, or it may be pasted, passed through a second calendar, and the other side may be bonded. Cool with air or naturally and cut to the required width and length.

Applicant's representative: Masashi Amemiya Procedural amendment (0) Commissioner of the Japan Patent Office Kazuo Wakasugi1, case description 1982 patent application No. 0590832, name of invention Address 2-11 Nishigotanda, Parts Ward, Tokyo Mr. 20
Name (517) Fujikura Rubber Industries Co., Ltd. 4, Agent 03-264-3566 6, Contents of Amendment +11 The scope of the claims is amended as follows.

``Claims [11] To 100 parts by weight of synthetic trans-1,4 polyisoprene, 5 to 70 parts by weight of a polymer or polyester resin obtained by polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer was added. A surgical medical auxiliary material characterized by having a compound layer formed on both sides of a heavy body.

(2) The surgical medical auxiliary material according to claim 1, wherein 50 to 700 parts by weight of magnetic powder and/or 1 to 10 parts by weight of an antiinflammatory agent are added to the compound layer.

(3) Synthetic trans 1.4 polyisoprene 100 Polymer or polyester resin obtained by grafting vinyl chloride onto ethylene-vinyl acetate copolymer
A heavy body is immersed in a blend solution to which 5 to 70 parts by weight is added,
A method for producing surgical medical auxiliary materials characterized by drying.

(4) A mixture of 100 parts by weight of synthetic trans-1,4 polyisoprene and 5 to 70 parts by weight of a polymer obtained by grafting vinyl chloride onto an ethylene-vinyl acetate copolymer or a polyester resin was added to both sides of the polymer. 1. A method for manufacturing a 1m long building material, characterized in that it is laminated to a 1m long building material. (2) In the specification, "50 to 400 parts by weight" on page 11, line 4 is corrected to "50 to 700 parts by weight."

(3) On page 11, line 6, "on the other hand, 400 parts by weight" is corrected to "on the other hand, 700 parts by weight".

Claims (1)

[Claims] (11 Synthetic trans 1.4 Polymer or polyester resin obtained by graft polymerizing vinyl chloride to ethylene-vinyl acetate copolymer to 100 parts by weight of polyisoprene)
A surgical medical auxiliary material, characterized in that a compound layer containing 5 to 70 parts by weight is formed on both sides of a heavy body. (2) The surgical medical auxiliary material according to claim 1, wherein 50 to 400 parts by weight of magnetic powder and/or 1 to 10 parts by weight of an antiinflammatory agent are added to the compound layer. ' (3) Synthetic trans 1.4 polyisoprene 100 weight μ11, a polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer or a polyester resin 5 to 70 parts by weight is added to a compound solution. A method for producing surgical medical auxiliary materials, which comprises soaking and drying. (4) Polymer or polyester resin obtained by graft polymerizing vinyl chloride to ethylene-vinyl acetate copolymer to 100 parts by weight of synthetic trans 1.4 polyisoprene.
1. A method for producing an auxiliary material for surgical treatment, characterized in that a compound to which 5 to 70 parts by weight is added is laminated on both sides of a heavy body.