KR20020080152A - Composition ingredients of polyurethane form for shielding of electromagnetic wave, and manufacture method - Google Patents

Abstract

PURPOSE: Provided are a composition of polyurethane foam excellent in shielding for magnetic field of electromagnetic wave, and a method for preparing the polyurethane foam. CONSTITUTION: The composition is produced by quantitatively mixing 5-50 parts by weight of electromagnetic absorber(any one of Mn-Zn-, Ni-Zn-, Mg-Zn-, Mg-Cu-Zn-ferrite) having particle size of 0.1-10 micrometer, which is coated with 0.5-3.0 wt% of fatty acid sealant, into a material consisting of 50-75 parts by weight of toluene di-isocyanate(TDI), 1-3 parts by weight of polyalkyleneoxidemethyl or siloxane copolymer(silicone), 3-15 parts by weight of methylene chloride(MC), 0.2-0.6 parts by weight of tin catalyst(stannous octoate), 0.1-0.2 parts by weight of amine catalyst(bis-dimethylaminoethyl-ether) and 3-10 parts by weight of H2O(wherein the parts by weight is based on 100 parts by weight of polypropylene glycol).

Description

Composition ingredients of polyurethane form for shielding of electromagnetic wave, and manufacture method

The present invention relates to a composition of a polyurethane foam (polyurethane form) having an electromagnetic shielding function and to a method of manufacturing a polyurethane foam using the same, in particular, magnetic field inflow to the human body by shielding the magnetic field of electromagnetic waves generated in electronic devices and information communication terminals, etc. Minimized, and garments manufactured using the same can be worn and used by workers and the general public who are easily exposed from electromagnetic waves.

Conventionally, fibers or products that block electric fields in electromagnetic waves using conductive materials have become mainstream. The electromagnetic wave shielding fiber is an industrial barrier material by etching copper or nickel, which is a conductive metal with electromagnetic shielding, after the non-conductive fiber is etched with alkali, and then neutralized, as known from Japanese Patent Application No. 40-27400. Or a method for manufacturing the lining of clothing for electromagnetic wave shielding, a method for producing a fiber after coating the conductive metal on the yarn and a method for mixing the organic conductive fiber and ordinary fiber prepared by coating copper sulfate on the surface of the synthetic fiber The majority of conductive products are manufactured by using a conductive material such as non-conductive fiber or yarn. Products manufactured using a conductive material have an excellent effect of shielding an electric field from electromagnetic waves, but have a problem of decreasing effect on magnetic fields.

And there is no technology of functional clothing and building interior and exterior materials using the electromagnetic shielding polyurethane foam pursued by the present invention. For example, in the conventional bra technology using a form among garments, the pursuit of improved fit through design and structural improvements, and in recent years, a far-infrared ray using a bra and char using a conductive material as a harmful soybean of electromagnetic waves. There is a release electromagnetic wave bra. However, the former has the effect of blocking the electric field among the electromagnetic waves, but does not block the magnetic field.The latter is not only questioned at room temperature, but also the electromagnetic wave absorbing effect is weak, but the electromagnetic wave absorbing ability is also weak. Very falling.

The present invention has been made to solve the above problems and provides a composition of polyurethane foam (polyurethane form) and polyurethane foam manufacturing method excellent in shielding performance of the electromagnetic field in the electromagnetic wave, and further has an antibacterial effect product In particular, the purpose is to provide a multi-functional bra.

1 is an electromagnetic shielding rate of the electromagnetic wave absorber

2 is the electromagnetic shielding rate of the electromagnetic wave absorbing composite

The present invention relates to a composition and a method of manufacturing a polyurethane foam (polyurethane form) having an electromagnetic shielding function, and an application manufactured using the same, which generally includes a polyurethane foam for use in bras in clothing;

Polypropylene glycol (PPG), toluene di-isocyanate (TDI), silicone (siloxane copolymers) or polyalkyleneoxidemethyl, MC (methylene chloride), TIN catalyst (stannous octoate), Amine catalyst (bis-dimethylaminoethyl-ether) and H ₂ O The mixture was mixed at a ratio, and the electromagnetic shielding composition was prepared by subjecting the electromagnetic shielding material to a special coating treatment with 0.5 to 3 wt% fatty acid sealant and adding 5 to 50 parts by weight based on the PPG (polypropylene glycol) addition standard. The electromagnetic wave shielding material used at this time is an electromagnetic wave absorber (any one of Mn-Zn-, Ni-Zn-, Mg-Zn-, Mg-Cu-Zn-ferrite) having a particle size of 0.1 to 10㎛. Electromagnetic shielding polyurethane foam can be produced. In addition, 0.1-2.5 μm inorganic antimicrobial material (Cu-, Zn-, Ag-zeolite, Ag-Zn-zeolite, Ag-Ca phosphate, Ag-Zr phosphate) was added for the antibacterial action.

In order to achieve the above object, the present invention is based on 100 parts by weight of polypropylene glycol (PPG) 50 to 75 parts by weight of toluene di-isocyanate (TDI), 1 to 3 parts by weight of silicone (siloxane copolymers), MC (methylene chloride) ) 3 to 15 parts by weight, 0.2 to 0.7 parts by weight of TIN catalyst (stannous octoate), 0.1 to 0.2 parts by weight of Amine catalyst (bis-dimethylaminoethyl-ether) and 3 to 10 parts by weight of H ₂ O were mixed and stirred, respectively. To this, 5-50 parts by weight of an electromagnetic wave absorber (any one of Mn-Zn-, Ni-Zn-, Mg-Zn-, and Mg-Cu-Zn-ferrite) having a particle size of 0.1 to 10 µm is mixed quantitatively and stirred. A composition of electromagnetic shielding polyurethane foam was prepared.

In addition, electromagnetic wave by preparing 0.3 to 3% by weight of inorganic antimicrobial material (Cu-, Zn-, Ag-zeolite, Ag-Zn-zeolite, Ag-Ca phosphate, Ag-Zr phosphate) To prepare a composition having a shielding and antibacterial action at the same time.

Configuration and working examples of the preferred invention for achieving the above object are as follows.

First, in order to produce a polyurethane foam, polypropylene glycol (PPG), toluene di-isocyanate (TDI), silicone (siloxane copolymers), methylene chloride (MC), TIN catalyst (stannous octoate), and Amine catalyst ( bis-dimethylaminoethyl-ether) and H ₂ O, each of which is added to a different container;

A aging step of ripening the input raw material for about 24 hrs;

These are 50 to 75 parts by weight of toluene di-isocyanate (TDI), 1 to 3 parts by weight of silicone (siloxane copolymers), 3 to 15 parts by weight of MC (methylene chloride) based on 100 parts by weight of polypropylene glycol (PPG) through a flow device. 0.2 to 0.7 parts by weight of TIN catalyst (stannous octoate), 0.1 to 0.2 parts by weight of Amine catalyst (bis-dimethylaminoethyl-ether) and 3 to 10 parts by weight of H ₂ O are subjected to a quantitatively transferred to a final mixing vessel;

Quantitatively mixed 5 to 50 parts by weight of the transferred raw materials and the electromagnetic wave absorber (any one of Mn-Zn-, Ni-Zn-, Mg-Zn-, Mg-Cu-Zn-ferrite) having a particle size of 0.1 to 10㎛ Through a final stirring process;

A composition of electromagnetic shielding polyurethane foam was prepared.

In particular, 60 to 68 parts by weight of TDI (toluene di-isocyanate), 1 to 1.5 parts by weight of silicone (siloxane copolymers), 5 to 10 parts by weight of MC (methylene chloride), 0.3 to 0.4 parts by weight of TIN catalyst (stannous octoate) It is preferred to use 0.1 to 0.15 parts by weight of Amine catalyst (bis-dimethylaminoethyl-ether) and 4.8 to 5.0 parts by weight of H ₂ O. In this case, to prepare a flexible polyurethane foam, a low viscosity mixed composition was prepared using 10 parts by weight of MC (methylene chloride) in 5 parts by weight of H ₂ O, and a rigid polyurethane foam was prepared by H ₂ O. 5 parts by weight of MC (methylene chloride) was used in 4.8 parts by weight. Among the raw materials used, silicone (siloxane copolymers) acts as an intermetallic, MC (methylene chloride) acts as a viscosity modifier, and TINcatalyst (stannous octoate) and Amine catalyst (bis-dimethylaminoethyl-ether) act as reaction promoters.

In a second embodiment, there is provided an exothermic foaming process for foaming a composition prepared through the first embodiment in a foaming apparatus;

PPG (polypropylene glycol) with hydroxyl group and toluene di-isocyanate (TDI) of di-isocyanate react to form a prepolymer (hereinafter referred to as ITP) with isocyanate group, and the resulting ITP and unreacted di-isocyanate are H ₂ Reacts with O to form polyurethane foam.

Exothermic foaming reaction is usually performed at room temperature of 20 ~ 25 ℃ controlled the change of the ambient temperature according to the season. Especially in winter, the product was stabilized by improving the ambient conditions to maintain the temperature of 20-25 ℃ by reinforcing the ambient temperature.

In the third embodiment, the electromagnetic wave absorber (any one of Mn-Zn-, Ni-Zn-, Mg-Zn-, and Mg-Cu-Zn-ferrite) is the main injection container in the process of mixing the composition as in the first embodiment. In order to prevent the difficulty of adding accurate electromagnetic wave absorber and blocking the transfer line due to the phenomenon of sedimentation at the bottom of the container during the aging process step within a long time, an additional container is separately installed and a certain amount of electromagnetic wave absorber (Mn-Zn-, Ni- One of Zn-, Mg-Zn- and Mg-Cu-Zn-ferrite), that is, a high concentration of PPG (polypropylene glycol) liquid is prepared and added through a separate line to PPG (polypropylene glycol) without the electromagnetic wave absorber and the final By mixing in the input container it was possible to add the desired amount.

In the fourth embodiment, an inorganic antimicrobial material (Cu-, Zn-, Ag-zeolite, Ag-Zn-zeolite, Ag-Ca phosphate, Ag-Zr phosphate) is added to the electromagnetic shielding composition prepared in Example 1 above. As a composition prepared by adding 0.3 to 3 parts by weight, it is prepared by adding to a PPG (polypropylene glycol) liquid container. The antimicrobial PPG (polypropylene glycol) prepared as described above is a composition having the effect of preventing the clogging of the transport line by the bacteria as well as the prevention of the yellowing phenomenon and fungi that inevitably occur in the foam product.

The fifth embodiment is a method of manufacturing a form usable in a bra by using a polyurethane foam prepared in the above process is prepared by putting a polyurethane foam on a press plate heated to a temperature of 200 ~ 240 ℃ .

Looking at the operation of the present invention as described above;

The result of measuring the electromagnetic wave shielding rate of the electromagnetic wave absorber added to the electromagnetic wave shielding composition of the present invention prepared by the composition and process as described above in the range of 100 ~ 6000MHz is shown in FIG. As shown in the results, the electromagnetic shielding rate at a specific frequency is almost 100%, and the electromagnetic shielding results of the electromagnetic wave absorbing composite in which these are mixed with a polymer are shown in [FIG. 2]. As shown in FIG. 2, the composite material exhibits electromagnetic shielding ability in the broadband region. It showed excellent shielding effect in the measurement area of 100 ~ 1100MHz, but it can be expected to show better electromagnetic shielding effect in the unmeasured area above 1100MHz.

And since the electromagnetic wave absorber itself has (+) ionicity, it has antimicrobial ability against (-) bacteria and at least 99% antimicrobial activity due to the added inorganic antimicrobial agent and antifungal ability that is hard to recognize for fungi. Indicated. The antimicrobial and antifungal results of this measurement are shown in the following [Table 1] and [Table 2], respectively.

Inorganic Antibiotic Addition Immediately after contact After 24 hours Antibacterial rate (%) BLANK 5300 2800000 0.5 wt% 5300 760 99.97 1 wt% 5300 120 99.99 2 wt% 5300 90 99.99

Inorganic Antibiotic Addition 0.5 wt% 1 wt% 2 wt% Antifungal Can't recognize the growth of bacteria Can't recognize the growth of bacteria Can't recognize the growth of bacteria

As an application example of the present invention, it is possible to use not only clothes but also various interior materials. Particularly, it is a product that can give electromagnetic shielding effect in high frequency band, that is, shielding effect in wide band up to 6GHz high frequency band, the effect was 50% minimum attenuation rate and 99.99% attenuation rate in some specific frequency band. . In addition, since it shows an equal shielding effect at 10GHz and above, it is possible to shield unnecessary electromagnetic waves generated from power transmission products and communication products, thereby protecting the exposure environment of electromagnetic waves generated in communication environments such as IMT-2000 and Bluetooth which will be opened in the future. Available as

Although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be embodied in various modifications by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

Recently, the debate about the harmful effects of electromagnetic waves and the human body, but the fact that the electromagnetic waves adversely affect the human body is not known. Therefore, various proposals have been made to minimize the damage to the human body from the electromagnetic waves as described above. However, there are few practical applications in our daily lives, and even if they are practical, their effects are insignificant. Therefore, there is a need for an electromagnetic wave shielding product that minimizes the exposure of electromagnetic waves in a clothing or electromagnetic environment that can protect the human body from the magnetic field constituting the electromagnetic waves.

Polyurethane foam having electromagnetic shielding and antimicrobial function produced by the present invention to meet the above requirements can be applied to a variety of products can easily protect the human body from the exposure of electromagnetic waves generated in various electronic devices and communication environment In addition, there is an advantage that can be obtained with the antibacterial effect due to the added antibacterial function.

Claims (4)

50 to 75 parts by weight of Toluene di-isocyanate (TDI) based on 100 parts by weight of polypropylene glycol (PPG), 1 to 3 parts by weight of polyalkyleneoxidemethyl or siloxane copolymer, 3 to 15 parts by weight of Methylene Chloride (MC), TIN catalyst ( Stannous Octoate) 0.2-0.7 parts by weight, Amine catalyst (bis-dimethylaminoethyl-ether) 0.1-0.2 parts by weight and H ₂ O 3-10 parts by weight, Electromagnetic wave absorber (Mn-Zn-, Ni-Zn-, Mg-Zn-, Mg-Cu-Zn-ferrite) having a particle size of 0.1 to 10 μm with a special coating treatment of 0.5 to 3% by weight of fatty acid sealant on the material. One) a polyurethane foam composition having an electromagnetic shielding function, characterized in that 5 to 50 parts by weight of quantitatively mixed and stirred Manufacturing method of electromagnetic shielding polyurethane foam composed of the following steps (A) The first process in which PPG, TDI, silicone, MC, TIN catalyst, Amine catalyst and H ₂ O are put in different containers to produce polyurethane foam. (B) a second step of ripening the injected raw material in about 24hrs; (C) 50 ~ 75 parts by weight of TDI, 1 ~ 3 parts of silicone, 3 ~ 15 parts of MC, 0.2 ~ 0.7 parts of TIN catalyst, 0.1 ~ amine catalyst based on 100 parts by weight of PPG through the flow device Third process in which 0.2 parts by weight and H ₂ O 3-10 parts by weight are quantitatively transferred to the final mixing vessel. (D) Difficulties in the addition of the corrected electromagnetic wave absorber due to the phenomenon that the electromagnetic wave absorber precipitates at the bottom of the container during a long period of aging in the main injection container during mixing 5 to 50 parts by weight of the transferred raw materials and the electromagnetic wave absorber; To prevent the phenomenon of clogging the transfer line, an additional container is separately installed to prepare a certain amount of high-concentration electromagnetic wave absorbing PPG liquid, which is injected through a separate line, and mixed in PPG where the electromagnetic wave absorber is not injected and the final input container, so that the desired amount can be added. 4th process to make (E) a fifth step, which is an exothermic foaming step of foaming the mixed composition in a foaming apparatus at a room temperature of 20 to 25 ° C; (F) manufacturing method of polyurethane foam having electromagnetic shielding, characterized in that the sixth step of compressing the foamed foam in a press plate heated to a temperature of 200 ~ 240 ℃ 50 to 75 parts by weight of Toluene di-isocyanate (TDI) based on 100 parts by weight of polypropylene glycol (PPG), 1 to 3 parts by weight of polyalkyleneoxidemethyl or siloxane copolymer, 3 to 15 parts by weight of Methylene Chloride (MC), Staninous Octoate) 0.2 to 0.7 parts by weight, Amine catalyst (bis-dimethylaminoethyl-ether) 0.1 to 0.2 parts by weight and H ₂ O 3 to 10 parts by weight, Electromagnetic wave absorber (Mn-Zn-, Ni-Zn-, Mg-Zn-, Mg-Cu-Zn-ferrite) having a particle size of 0.1 to 10 μm with a special coating treatment of 0.5 to 3% by weight of fatty acid sealant on the material. 1) 5 to 50 parts by weight 0.3-3% by weight of an inorganic antimicrobial agent (Cu-, Zn-, Ag-zeolite, Ag-Zn-zeolite, Ag-Ca phosphate, Ag-Zr phosphate) is quantitatively mixed and stirred Polyurethane foam composition with electromagnetic shielding and antibacterial function Manufacturing method of electromagnetic shielding and antibacterial polyurethane foam made up of the following steps (A) The first process in which PPG, TDI, silicone, MC, TIN catalyst, Amine catalyst and H ₂ O are put in different containers to produce polyurethane foam. (B) a second step of ripening the injected raw material in about 24hrs; (C) 50 ~ 75 parts by weight of TDI, 1 ~ 3 parts of silicone, 3 ~ 15 parts of MC, TIN catalyst 0.2 ~ 0.7 parts, Amine catalyst 0.1 ~ Third process in which 0.2 parts by weight and H ₂ O 3-10 parts by weight are quantitatively transferred to the final mixing vessel. (D) a fourth step in which 5-50 parts by weight of an electromagnetic wave absorber and 0.3-3% by weight of an inorganic antimicrobial material are quantitatively mixed with the transferred raw materials and the high concentration electromagnetic wave absorbing antimicrobial PPG liquid; In the process of mixing 5 to 50 parts by weight of the transferred raw materials and the electromagnetic wave absorber, the electromagnetic wave absorber is precipitated at the bottom of the container during a long time of aging process in the main injection container, thereby preventing difficulty in adding accurate electromagnetic wave absorber and transferring line. In order to prevent the phenomenon of clogging, a fourth process of preparing a certain amount of high concentration electromagnetic wave absorbing PPG liquid by adding an additional container and quantitatively adding it through a separate line and mixing the PPG liquid containing 0.3 to 3% by weight of inorganic antimicrobial material thereto (E) a fifth step, which is an exothermic foaming step of foaming the mixed composition in a foaming apparatus at a room temperature of 20 to 25 ° C; (F) Method of producing a polyurethane foam having an electromagnetic shielding and antibacterial function, characterized in that the foamed foam is compressed in a press plate heated to a temperature of 200 ~ 240 ℃