KR102255502B1 - medical epithesis material using chaff - Google Patents

Abstract

The present invention relates to a splint material used in a medical device and a method of manufacturing the same.The main configuration of the present invention is based on 100 parts by weight of rice husk, talc (CaCO ₃ ) 40-60 parts by weight, copolymer PP ( Copolymer polypropylene; hereinafter referred to as "copolymer PP") 50-80 parts by weight, PE (polyethylene; hereinafter, referred to as "PE") 30-50 parts by weight, homopolymer PP (homopolymer polypropylene; hereinafter, It is characterized in that it is a medical splint material using rice husk, characterized in that it contains 30-50 parts by weight, 3-7 parts by weight of wax as a lubricant, and 3-7 parts by weight of Zn as a dispersant.

Description

Medical splint material using chaff {medical epithesis material using chaff}

The present invention relates to a splint material used in a medical device, and in particular, for example, a medical device support used as a medical aid, an orthopedic splint, a cervical orthosis, a thoracolumbosacral orthosis (TLSO), a lumbar orthosis, a ceiling Lower extremity braces such as joint braces, upper extremity braces, foot braces, short extremity braces, long extremity braces, knee joint braces, etc., various braces, backrests, casts applied to the neck, wrists, knees, etc. It relates to a medical splint material that can be made using rice husk as a main material, applicable to shoes and the like.

In the conventional case, auxiliary devices or medical equipment including medical splints and the like have been made of various materials including metal or starch, chemical fibers, plastics, and the like. However, materials containing metal materials are not good to the touch and are too hard to damage the skin when worn for a long time, and skin problems or allergic reactions may occur when prolonged contact with the skin. Materials such as chemical fibers containing other chemical components cause skin problems or inflammation in people who are sensitive to skin, are not good for skin health, and are not eco-friendly materials, so when disposed of, waste causes environmental pollution. In view of this, there are some materials containing starch that are made environmentally friendly, but there is a disadvantage that they are easily broken because they are weak against moisture and too weak in strength.

Patent registration number: 10-1918071 (Registration date: 2018.11.07) Patent registration number: 10-0489848 (Registration date: 2005.05.06) Patent publication number: 10-2019-0070079 (Publication date: 2019.06.20)

The present invention was invented in consideration of the above points, and it is strong against impact, does not bend or breaks easily, has a soft surface and has a good touch, is an eco-friendly material that does not have an allergic reaction to the skin, and is light and well ventilated, and environmental pollutants are generated even when discarded. It is an object of the present invention to provide an eco-friendly medical splint material that can be incinerated without and exhibits a wide variety of effects that can change its shape within 1-4 minutes when heated with a hot air blower (dryer, etc.).

In addition, the present invention is an eco-friendly and continuously recyclable material because it can recycle discarded rice husk, and it is an eco-friendly medical splint material that is inexpensive compared to conventional materials, has the characteristics of not being damaged or cracked or broken by impact, It is an object of the present invention to provide.

The main composition of the present invention for achieving the object of the present invention described above is based on 100 parts by weight of rice husk, talc (CaCO ₃ ) 40-60 parts by weight, copolymer PP (copolymer polypropylene; hereinafter, " Copolymer PP") 50-80 parts by weight, PE (polyethylene; hereinafter, "PE") 30-50 parts by weight, homopolymer PP (homopolymer polypropylene; hereinafter, "homopolymer PP") It is a medical splint material using rice husk, characterized in that it contains 30-50 parts by weight, 3-7 parts by weight of wax as a lubricant, and 3-7 parts by weight of Zn as a dispersant.

In addition, the material is characterized in that it further comprises a colorant pigment.

In addition, the method of manufacturing a medical splint material using rice husk according to the present invention is based on 100 parts by weight of rice husk, talc (CaCO ₃ ) 40-60 parts by weight, copolymer PP 50-80 parts by weight, PE 30-50 Blending a raw material including 30-50 parts by weight of homopolymer PP, 3-7 parts by weight of wax as a lubricant, and 3-7 parts by weight of Zn as a dispersant; Kneading while heating the blended formulation to 100-150 degrees Celsius; Putting the kneaded dough into an extruder and extruding under a temperature condition of 150-200 degrees Celsius; Cooling the extrudate by immersing it in water; After cooling, taking it to a cutting machine and cutting it; It characterized in that it is made into a pellet shape, including, and after cooling, taking the cutting machine and cutting the raw material made into a pellet shape in a melting machine at 210-220 degrees Celsius; Discharging the pellet raw material melted in a temperature condition of 210-220 degrees Celsius through a screw extruder; Making a sheet by flattening the discharged discharge using a T-die at a temperature of 160-170 degrees Celsius; Cooling the flattened sheet by immersing it in cooling water; Drying the cooled sheet to remove moisture; It characterized in that it further comprises the step of cutting the moisture-removed sheet.

According to the present invention, it is strong against impact, does not bend or broken easily, has a soft surface, has a good touch, is an eco-friendly material that does not have an allergic reaction to the skin, is light and well ventilated, and can be incinerated without generating environmental pollutants even when discarded, and a hot air blower (dryer Etc.), etc.), which can change its shape within 1-4 minutes. It provides an eco-friendly medical splint material that exhibits a wide variety of effects.

In addition, the present invention is an eco-friendly and continuously recycled material that can recycle discarded rice husk, has a low price compared to conventional materials, has the characteristics of not being damaged by impact, cracked or broken, and is an eco-friendly medical splint that can be recycled. Provide the material.

The present invention is for a medical device support, orthopedic splint, cervical orthosis, thoracolumbosacral orthosis (TLSO), lumbar orthosis, spinal orthosis such as sacroiliac joint orthosis, upper limb orthosis, foot orthosis, short orthopedic orthosis It can be used for lower extremity braces such as braces and knee joint braces, various braces applied to the neck, wrist, knee, etc., backrests, and cast shoes.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram for explaining a process of mixing raw materials to produce pellets.
FIG. 2 is a view for explaining a process of manufacturing a sheet by using the raw material pelletized in FIG. 1.

Hereinafter, the present invention will be described in more detail with the accompanying drawings.

First, in the present invention, the following raw materials are combined to form a mixture. Then, the mixture is extracted from the extruder, cut and molded into pellets. Examples of the raw material mixture are as follows.

Based on 100 parts by weight of rice husk,

Talc (CaCO ₃ ) 40-60 parts by weight, preferably 50-56 parts by weight,

50-80 parts by weight of copolymer PP, preferably 63-69 parts by weight,

PE 30-50 parts by weight, preferably 38-42 parts by weight,

Homopolymer PP 30-50 parts by weight Preferably 38-42 parts by weight,

3-7 parts by weight of wax as a lubricant, preferably 4.3-4.9 parts by weight,

3-7 parts by weight of Zn as a dispersant, preferably 4.3-4.9 parts by weight,

Small amount depending on the colorant (pigment) required operation.

Rice husk is a natural by-product and has the advantage of recycling what is discarded as it occupies the largest portion of cost reduction as an eco-friendly property. If it is less than the above range, more use of other materials does not help in cost reduction and poor ventilation. If it is more than the above range, holes are generated in the product due to aggregation of raw materials, and the surface condition appears rough.

Talc acts as a skin protection agent, a slip control agent, a lubricant, and an oxidation accelerator, especially used for sheet color work, has a great influence on degradability and product strength control, and contributes to cost reduction. If talc is above the above range, there is a difficulty such as cracking or breaking during product production, and below the above range, there is a disadvantage in that the above properties cannot be exhibited.

Copolymer PP is the most important component that influences the physical properties of a product, and plays the most important role, such as maintaining elongation (elongation). If it is less than the above range, it adversely affects the elongation strength, and if it is used above the above range, there is a disadvantage that the cost increases.

PE is particularly preferable to use HDPE (high density polyethylene), and is used for the purpose of maintaining strength and elongation. When used less than the above range, the elongation is weak and the strength is low, and when used in excess, the strength is too high. There is a problem in processing. That is, cracking or sagging occurs.

Homopolymer PP has a melting point of 167-170 degrees Celsius, and its mechanical strength is greater than that of HDPE (high density polyethylene). In addition, it has heat resistance, mechanical properties, chemical resistance and recyclability. However, it is weak against low-temperature impact. Homopolymer PP works advantageously in injection and extrusion molding operations. In addition, homopolymer PP is for strength adjustment, and if it is used more than the above content range, the hardness is too strong to cause cracking, and if it is less than the above range, desired physical properties cannot be obtained.

Lubricants and dispersants are used to prevent this because they stick together when the mixture is extruded at high temperatures, and also to improve dispersibility to prevent stains or agglomeration of raw materials on the product surface. When it enters, lamination defects occur in the secondary processing, and the printing operation becomes poor.

The colorant is used by mixing the desired color and the colorant in the state of the master batch to create the desired color. The colorant is not absolutely necessary, but can be mixed as needed.

Specific examples of the components of the mixture according to the present invention are as follows.

Based on 100 parts by weight of rice husk,

53 parts by weight of talc (CaCO _{3 ),}

66 parts by weight of copolymer PP,

40 parts by weight of PE,

40 parts by weight of homopolymer PP,

4.6 parts by weight of wax as a lubricant,

4.6 parts by weight of Zn as a dispersant,

The extrusion production line process for pelletizing the mixture of the above materials is shown in FIG. 1.

1 is a process of pelletizing the mixture. As shown, the raw materials are blended and sufficiently mixed for 10 to 30 minutes. Then, knead it while heating it to 100-150 degrees Celsius. When kneading under the above temperature conditions, there is a preheating effect of the subsequent extrusion process, and the kneading is made even more smoothly. The dough after kneading is fed into an extruder and extruded at a temperature of 150-200 degrees Celsius, for example on a T-die. If the extrusion temperature exceeds 200 degrees Celsius during extrusion, considering the melting points of PP (polypropylene, hereinafter referred to as "PP") and PE (polyethylene, hereinafter referred to as "PE"), they melt and become rice cakes. It is not desirable because the physical properties change. Below this temperature, it is not helpful for extrusion molding.

Extruders can use several different types of extruders. The extruded product is extruded like a noodle string, which is immediately immersed in water and quickly cooled with water. The reason for water cooling is to prevent the raw materials from sticking to hot. After cooling, take it to a cutter and cut it into a pellet shape (for example, about 2-3 mm long). Then, it is sorted, dried, and stored in a silo. Then, the final pellets are packaged and sold.

FIG. 2 is a sheeting process in which the pelletized raw material prepared in FIG. 1 is made into a sheet.

As shown, after the process of FIG. 1 above, in the case where the pelleted raw material is to be made into a sheet form, the pellet is taken from the pellet raw material tank and melted at 210-220 degrees Celsius in a melting machine. There is a disadvantage in that it may not be sufficiently melted below the above temperature, and changes in physical properties appear above the above temperature. The melted pellet raw material is mixed evenly through a screw under the same temperature condition and discharged by extrusion, and then flattened by passing through a T-die at a temperature of 160-170 degrees Celsius. Flattening may not work well below the above temperature. The T-Die is a device that flattens the extrudate by pressing it through a pair of upper and lower rolling rollers. The thickness of the sheet can be adjusted by adjusting the upper and lower intervals of the polishing roller of the T-Die. The flattened sheet is cooled by water cooling, that is, immersed in water using cooling water.

Then, it is dried to remove moisture, cut into a plate shape in the required dimensions of width and length, for example, about 1200mm in length, and then packaged and shipped after inspection of appearance and physical properties. The mixture sheet containing rice husk prepared in this way is mass-produced, for example, with a thickness of 2-10 mm, a width of 12-20 mm, and a length of 20-1200 mm. Of course, it is possible to change and mass-produce any number of changes according to the desired standard. If the mass-produced rice husk mixture sheet is supplied from a medical device production plant, it can be processed into a desired shape to manufacture and supply various types of splints or braces.

Although the present invention has been mainly described for the medical splint material, the present invention is not limited thereto and can be applied to various forms by using the medical equipment material of the present invention.

According to the present invention as described above, it is possible to manufacture inexpensively using eco-friendly materials that are discarded, harmless to the human body, and eco-friendly disposal at the time of disposal, and also recycling recycling by melting the material again It is highly versatile not only in industry but also in other material fields, and its application value is expected to be very great.

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Claims (4)

Based on 100 parts by weight of rice husk,
Talc (CaCO ₃ ) 40-60 parts by weight,
50-80 parts by weight of copolymer PP,
PE 30-50 parts by weight,
30-50 parts by weight of homopolymer PP,
3-7 parts by weight of wax as a lubricant,
Medical splint material using rice husk, characterized in that it contains 3-7 parts by weight of Zn as a dispersant. delete delete delete

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