KR100933465B1 - Thermoplastic adhesive composition and chemical protection clothes thereby - Google Patents

Abstract

PURPOSE: A thermoplastic adhesive composition is provided to ensure excellent heat resistance, high-temperature stability, chemical resistance and adhesive force and to be used for special chemistry chemical protection clothes. CONSTITUTION: A thermoplastic adhesive composition comprises a polyolefin, polyvinyl chloride, and vinyl acetate- vinyl chloride copolymer, epoxide soybean oil, calcium stearate, triisooctyl phosphate, stearate, DOP, and Pb type stabilizer. The polyvinyl chloride is used in the amount of 10-50 parts by weight based on the polyolefin 100.0 parts by weight. The vinyl acetate- vinyl chloride copolymer is used in the amount of 5-25 parts by weight based on the polyolefin 100.0 parts by weight.

Description

Thermoplastic adhesive composition and chemical protective suit thereby {THERMOPLASTIC ADHESIVE COMPOSITION AND CHEMICAL PROTECTION CLOTHES THEREBY}

The present invention relates to a thermoplastic adhesive composition and a chemical protective suit thereby, and more particularly to a thermoplastic adhesive composition in the form of a film containing polyolefin, polyvinyl chloride, and vinyl acetate-vinyl chloride copolymer and a chemical protective suit It is about.

In general, the adhesive can be broadly divided into an aqueous adhesive, a thermoplastic adhesive in the form of a hot melt, and a solvent adhesive. Among them, aqueous and solvent-based adhesives have excellent cohesion and adhesion to a wide range of adherends, but there are many disadvantages such as chemical resistance in special clothing such as chemical protective clothing.

On the other hand, thermoplastic adhesives, also called hot melt or hot melt adhesives, are solid materials at room temperature (100% Solid) and are melted by heat without melting or dispersing in a solvent (Solvent free). It is composed. When used, it is melted by heat and applied to various adherends, and then cooled and solidified to express adhesive strength. The thermoplastic polymers include ethylene vinyl acetate copolymer (EVA), polyvinyl acetate (PVA), Polyethylene (PE), amorphous polypropylene (Amorphous polypropylene), thermoplastic elastomers (Thermoplastic elastomers), polyamide (Polyamide) and polyester (Polyester) and the like.

The main composition is classified into polymer, diluent, stabilizer, extruder and pigment. In particular, diluents are used to lower the viscosity, improve the wettability, increase adhesion strength and increase rigidity or flexibility for workability.

Since the thermoplastic adhesive is heated and melted at a high temperature and cooled immediately upon application, a continuous process is possible, and since the volatile matter is not generated, the adjustment of the coating thickness is simple and uniform, and is generally composed of three components of a base polymer, an adhesive resin, and a wax If necessary, it is prepared by combining an antioxidant, a plasticizer, a flame retardant and the like.

Moisture cure hot melts described in US Pat. No. 6,191,212 are two-component urethane hot melts that are convenient to use, crystalline polyesters having an isocyanate group of 0.16-0.84 mol and a molecular weight of 2,000-10,000. Reaction with a polyester / polyether polyol produces a prepolymer, i.e. an isocyanate-terminated polyurethane. However, since the hot melt is for curing the moisture, it depends on the relative humidity or the rate at which moisture in the air diffuses onto the contact surface, and thus requires several days to completely cure.

German Patent No. 4,000,695 also describes amorphous polyolefins as hot melt adhesives that are grafted with reactive monomers. Although the adhesive has improved cohesion and adhesion, there is a disadvantage in that the thermal stability is low.

In addition, U. S. Patent No. 5,883, 172 describes a polyamide hot melt adhesive, which is 30 to 90% polyamide, carbonate, stabilizer for bonding to metal, plastic, and multiple cables. , 5 to 70% of a filler including antioxidants, pigments and preservation, and 0.1 to 5% of additives, and has a strength of about 30.7 for copper metal. N / cm.

However, although the adhesives are widely used in the construction, packaging, bookbinding, woodworking, electrical and electronic fields, there are problems in heat resistance, cold resistance, adhesion, flame retardancy, and thermal shock strength, and the most fatal defect is toxicity. You can't expect to defend against toxic chemical materials or chemical solvents. That is, the aforementioned general adhesives are very poor in chemical resistance.

Therefore, the chemical protective clothing produced using the above-described adhesive is not only resistant to chemical resistance because it is poor in chemical resistance, and can not expect chemical defense against certain chemicals.

The present invention has been made to solve the above problems and at the same time to develop a thermoplastic adhesive excellent in chemical resistance and chemical protective clothing thereby, the main object of the present invention is excellent in heat resistance, meltability, high temperature stability, in particular The present invention provides a thermoplastic adhesive composition having excellent chemical resistance and adhesion and a chemical protective suit thereby.

The thermoplastic adhesive composition according to the present invention for achieving the above object, in the composition for forming a thermoplastic adhesive, polyolefin, polyvinyl chloride and vinyl acetate-vinyl chloride copolymer, and epoxide soybean oil, calcium stearate, triisoocta It is characterized by consisting of methyl phosphate, stearic acid, DOP and Pb type stabilizer.

Wherein the polyvinyl chloride is 10 to 50 parts by weight based on 100 parts by weight of the polyolefin; The vinyl acetate-vinyl chloride copolymer may be 5 to 25 parts by weight based on 100 parts by weight of the polyolefin.

And, the epoxide soybean oil is 2 to 5 parts by weight based on 100 parts by weight of the polyolefin; The calcium stearate is 2 to 3 parts by weight based on 100 parts by weight of the polyolefin; The triisooctyl phosphate is 2 to 3 parts by weight based on 100 parts by weight of the polyolefin; The stearic acid is 2 to 3 parts by weight based on 100 parts by weight of the polyolefin; The DOP is 5 to 10 parts by weight based on 100 parts by weight of the polyolefin; The Pb-type stabilizer is based on 100 parts by weight of the polyolefin 2 parts by weight.

On the other hand, the polyolefin may be composed of a high density or low density polyethylene having a Melting Index (Melting Index) of 0.98 ~ 4.5g / min or a polypropylene having a Melt Viscosity Index of 3.5 ~ 12g / min.

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On the other hand, the chemical protective suit according to the present invention is provided with a lens made of a material that can be viewed, has a lens hole shielded by the lens, a hood made of a non-permeable material to prevent the penetration of fluid; A protective clothing made of a non-permeable material which is worn on the human body together with the hood and prevents penetration of the fluid; It includes; the thermoplastic adhesive as described above to be sealed in the airtight state while being bonded to the connection portion of the protective clothing and the fabric forming the hood.

In this case, the adhesive is preferably configured to seal the connecting portion to which the hood and the lens are attached by attaching the two lens-lens edge fabrics overlapping the edge of the lens to the edge of the lens in the same body.

Here, the hood is formed on the rim side fabric of the lens hole and forms a portion of the hood while the lens is attached; preferably comprises a further comprising, the lens, for example, the cover of the hood by the adhesive Transparent material external lens of a thin film form attached to the same body and exposed to the outside air; A transparent material inner lens formed in a state overlapping with the outer lens and having a rim fixed to the rim of the lens hole; A transparent material intermediate lens having a thinner thickness than the inner lens and the outer lens and interposed between the inner lens and the outer lens; And an adhesive applied along edges of the intermediate lens, the inner lens, and the outer lens.

In this case, the outer lens, the inner lens and the intermediate lens is preferably composed of a soft polymer film. The outer lens and the inner lens are preferably made of PVC vinyl, and the intermediate lens is made of fluorine resin. At least one of the external lens, the internal lens and the intermediate lens is more preferably configured to have a hydrophilic surface by corona charge treatment. In particular, the intermediate lens is subjected to corona charge treatment for 22 seconds to 2 minutes and 10 seconds under conditions of 10 to 20 kHz, 2.1 to 5.3 kV, and 89 to 133 mA, and a surface energy of 32 to 40 mN / m and a peeling of 4.2 to 5.4 kg / in. Most preferably, it is configured to have strength.

Thermoplastic adhesive composition according to the present invention as described above is excellent in heat resistance, meltability, high temperature stability, chemical resistance and adhesion can be used in various industrial fields.

In addition, it exhibits high resistance to toxic chemicals compared to conventional melt adhesives, and also has excellent protection against chemical agents such as nerve agents (GD, Soman) or blisters (HD, Sulfur mustard). It can be usefully used for clothing.

In addition, in the chemical protective suit according to the present invention, since the connecting portion is attached by the adhesive of the present invention described above, the connecting portion is sealed in an airtight state. In addition, after the lens is composed of an external lens and an internal lens, or composed of an external lens, an internal lens and an intermediate lens, when the lenses are adhered with an adhesive, the connection part can be sealed with the adhesive in multiple steps. Furthermore, when any one of the outer, the inner and the intermediate lens is made of fluorine resin, transparency can be more reliably secured. In addition, when the lens made of fluorine resin is subjected to corona charge treatment, the adhesive ability of the adhesive can be improved. have. In particular, when corona charge treatment is performed for 22 seconds to 2 minutes and 10 seconds under conditions of 10 to 20 kHz, 2.1 to 5.3 kV and 89 to 133 mA, an excellent contact angle is obtained, as well as surface energy of 32 to 40 mN / m and 4.2 to Peel strength of 5.4 kg / in can be obtained.

Hereinafter, the thermoplastic adhesive composition according to the present invention will be described in detail.

The thermoplastic adhesive composition according to the present invention consists of polyolefin, polyvinyl chloride and vinylacetate-vinyl chloride copolymer, and epoxide soybean oil, calcium stearate, triisooctyl phosphate, stearic acid, DOP and Pb type stabilizers.

Specifically, the composition according to the present invention comprises 10 to 50 parts by weight of polyvinyl chloride and 5 to 25 parts by weight of vinyl acetate-vinyl chloride copolymer based on 100 parts by weight of polyolefin.

In the above, the polyolefin is preferably polyethylene or polypropylene, more preferably a high density or low density polyethylene having a melt index of 0.98 to 4.5 g / 10 min or a polypropylene having a melt viscosity of 3.5 to 12 g / 10 min. It is good. In addition, the crystallinity of the polyolefin is preferably 1 to 30%, more preferably 10 to 20%.

If the degree of crystallinity of the polyolefin is less than 1%, a phenomenon of completely peeling off with the adhesive appears.

In addition, the polyvinyl chloride used as the adhesion imparting resin in the present invention is characterized in that it is not compatible with polyolefin, the content is preferably 10 to 50 parts by weight relative to 100 parts by weight of polyolefin.

When the content of the polyvinyl chloride is less than 10 parts by weight, sufficient adhesive strength is not given, and when used in excess of 50 parts by weight, the permeation resistance to chemicals is poor.

In addition, the vinyl acetate-vinyl chloride copolymer is a vinyl chloride content of 1 to 20% by weight based on the total weight%, it is preferable that the vinyl acetate is 80 to 99% by weight.

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Here, the epoxide soybean oil, calcium stearate, triisooctyl phosphate, stearic acid, DOP and Pb type stabilizers are mixed with each other to reinforce the weight and rigidity of the adhesive composition according to the present invention, to increase thermoplasticity, and to prevent oxidation To improve processing lubricity, to provide flame retardancy and to express desired color. In particular, DOP (Dioctylphthalate) serves as a plasticizer, stearic acid as a processing lubricant. These components are generally inert and do not affect the properties of the substantial constituents polyolefin, polyvinyl chloride and vinyl acetate-vinyl chloride copolymer.

The adhesive composition of the present invention is produced by a conventional method used in the art, and there is no particular limitation on this production method.

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Hereinafter, the thermoplastic adhesive composition according to the present invention will be described in more detail with reference to the following Examples. The following examples are merely to illustrate the present invention, but the contents of the present invention are not limited to the following examples.

EXAMPLES Preparation of Thermoplastic Adhesive Compositions

To the composition of Table 1 was mixed with stirring for 10 to 30 minutes in a mixing apparatus, and melted and kneaded at 120 ~ 135 ℃ to prepare a final thermoplastic adhesive composition.

TABLE 1

Specifically, the thermoplastic adhesive composition according to the embodiment is a polyolefin, polyvinyl chloride and vinyl acetate-vinyl chloride copolymer, and exemplified soybean oil, calcium stearate, triisooctyl phosphate, as disclosed in Table 1 above. It was composed of stearic acid, DOP and Pb type stabilizer. Here, [Table 1] is a table showing that the composition of the thermoplastic adhesive composition of five kinds (action numbers 1 to 5) by varying the component ratio (mixing ratio).

Experimental Example  1. Check the adhesive strength

In the present invention, in order to confirm the adhesive strength of the thermoplastic adhesive of the present invention, the thermoplastic adhesive composition of the above embodiment is set so that the temperature of the extruder is 120 ~ 135 ℃ and injected into a film of 0.8 ~ 1.2 mm thick rubber film form and,

It is placed between two adherents selected from polyvinyl chloride, polytetrafluoroethylene, or polyolefin, and is pressed at 135 ° C., 5 seconds, and a pressure of 7 kg / cm 2 to melt the surface of the film and adhere it with the adherend. After cooling for 10 seconds at room temperature, test the specimen (25 mm wide, 241 mm long, 76 mm above and below the T spacing, respectively) according to ASTM D 1876 "Standard Test Method for Peel Resistance of Adhesives (T-Pell Test)" method. The tensile strength was progressed to 254 mm / min to measure the adhesive strength.

Experimental Example  2. Check chemical penetration resistance

In the present invention, to confirm the chemical resistance of the thermoplastic adhesive composition of the above embodiment, the ASTM F 739 "Standard Test Method for Resistance of Protective Clothing Materials to Permeation by Liquids or Gases Under Conditions of Continuous Contact" method was used.

Specifically, the adherend adhered as in Experimental Example 1 was cut to a size of about 5 cm ² , and a toxic chemical having a purity of 99% on the outer surface of the adherend cut at a temperature of 32 ° C. (manufacturer: ALDRICH Co. , USA) and the liquid or gas trapping medium flowed into the compartment with the inner surface of the adherend to measure the time at which the concentration of the detected chemical reaches the breakthrough concentration (0.1 μg / cm 2 min). However, at this time, acrolein (Acrolein), dimethyl sulfate (Dimethyl sulfate), ammonia (Ammonia), chlorine (Chlorine), HD (bubble agent), GD (nerve agent) was used.

The breakthrough time was measured three times for each of the same specimens and represented as an arithmetic mean value. When the experiment was completed, the swelling and peeling of the specimens were visually observed.

As shown in Table 1, in the case of composition 1 and composition 5, it was broken through within 10 minutes, but in other compositions, it was found to be 30 minutes or more, and composition 3 showed the best resistance. It was confirmed. That is, it was confirmed that the thermoplastic adhesive composition according to the present invention exhibits high resistance to toxic chemicals and chemical agents.

Here, the experimental method of Experimental Example 2 will be described in more detail as follows.

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<Test Method for Chemical Permeation Resistance (Test Method for Materials)>

In the penetration resistance test, as shown in Figures 1 and 2 below, the sample and the specimen to be tested are placed in the center of the transmission cell, and then the test chemicals are exposed on the outer surface of the material, and the liquid or gas in the compartment with the inner surface of the material. The collection medium is allowed to flow to measure the time for which the concentration of chemicals detected in the collection medium reaches the breakthrough concentration (0.1 µg / cm 2 min). In this case, the detailed test apparatus and test procedure for the test are to be in accordance with the following items.

  1. The permeation cell used for the test consists of two hollow compartments separated by flanges as shown in Figure 2 below. The inner diameter of the compartment is 51 mm. The material of permeation cell should be glass material which does not react with chemicals. However, when testing chemicals that react with glass, stainless steel etc. should not be used. The pipe joints for the two compartments use flanged joints made of aluminum, and gaskets made of polytetrafluoloethylene (PTFE) are used for sealing between the flanges.

  2. The capture media that collects test chemicals and send them to the analysis device are materials that do not react with the test chemicals.In the case of gaseous capture media, inert gas such as dry air or high-purity nitrogen or helium is used. In the case of water, use a liquid that does not react with water or the test chemical.

  3. The collected test piece shall be mounted on the permeation cell so that the part contacting the test chemical becomes the material outer surface, and the collecting medium flows into the collecting compartment at the flow rate specified in Clause 2 so that the test apparatus can reach a stable state. The injection of the test chemicals is to be made in full contact with the surface of the specimen of the permeation cell and the elapsed time from this time until the breakthrough concentration is reached is the breakthrough time.

5. The test chemicals used in the test shall be acrolein, dimethylsulfate, ammonia, chlorine, HD, and GD. The test shall be carried out on three identical specimens.

On the other hand, Figures 1 and 2 are attached to the chemical protective clothing according to an embodiment of the present invention prepared by the above-mentioned thermoplastic adhesive, Figure 1 is a front view of the chemical protective suit according to an embodiment of the present invention 2 is an enlarged front view of a portion of the chemical protective suit shown in FIG. 1. The chemical protective suit according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

Referring to FIG. 1, the chemical protective suit 1 according to an embodiment of the present invention includes a hood 10 and a hood 10 having a lens 12 attached to a lens hole 10 ′ as shown. Includes; protective clothing 20 to form a suit.

Here, the hood 10 and the protective clothing 20 described above are made of a non-permeable material to prevent the penetration of the fluid. That is, the hood 10 and the protective clothing 20 is composed of a flexible fabric such as vinyl or rubber or a fabric coated with a waterproof material. Thus, the hood 10 and protective clothing 20 are worn on the human body to prevent fluid chemicals from penetrating inside.

In addition, the lens 12 described above is made of a material that can be viewed so as to enable external viewing. The lens 12 may be made of a transparent plastic, vinyl, resin, or the like of a flexible material so as to be made of a non-permeable material for preventing the penetration of fluid. Such a lens 12 is attached to the hood 10 by the same adhesive as described above to shield the lens hole 10 'in an airtight state.

Referring to FIG. 2, the chemical protective suit 1 according to the embodiment of the present invention includes a lens (eg, a lens in the lens hole 10 ′ of the hood 10, as shown in an enlarged view “a” (partial enlarged enlarged perspective view)). 12) is attached. At this time, the lens 12 is attached to the lens hole 10 'by the film adhesive 30 in the form of a thin film as shown in the enlarged view "b". This adhesive 30 is produced by the composition described above.
This chemical protective suit 1 is shown on the rim side of the lens hole 10 'when the lens 12 is composed of several lenses 12a, 12b, 12c as shown in the enlarged view "a". After providing such a cover 10a, it is preferable to arrange | position and attach the lens 12 between the cover 10a and the edge fabric of the lens hole 10 '. At this time, the outer lens 12a to be described later is attached to the cover 10a with a film-type adhesive 30 as shown in enlarged, and the inner lens 12c to be described later is sewing the edge side fabric of the lens hole 10 ' It is preferable to attach to the. However, the chemical protective suit (1) is different from the illustrated when the lens 12 is composed of one, that is, composed of only the outer lens 12a, the edge of the lens hole 10 'by using the film adhesive 30 The lens 12 can be attached directly to the side fabric. Of course, the above-described cover 10a can be omitted when the lens 12 is composed of one.
Here, the aforementioned cover 10a may be attached to the fabric of the hood 10 by using a general liquid adhesive, or alternatively, may be attached to the fabric of the hood 10 by using the aforementioned film adhesive 30.

The film adhesive 30 is interposed between the edge of the outer lens 12a and the edge of the cover 10a, which will be described later, as shown in the enlarged view "a" when the lens 12 is composed of several lenses. That is, the adhesive 30 is disposed at the connection portion CN where the lens 12 and the hood 10 are connected to each other. At this time, the edge side fabric of the lens hole 10 ', the edge of the lens 12, the edge of the adhesive 30 and the cover 10a are sequentially stacked (overlapping) as shown.

The adhesive 30 attaches the edge of the lens 12 and the edge of the cover 10a to the same while being hardened after the surface is melted by heat applied from the outside. That is, the adhesive 30 attaches the external lens 12a described later to the cover 10a. At this time, the edge of the lens 12, the edge of the cover 10a, and the adhesive 30 are substantially in an integral state and become inseparable. Thus, the rim of the lens 12 and the rim of the cover 10a are hermetically sealed to protect the hood 10 against toxic chemicals.

This adhesive 30 attaches the zipper 22 provided on the protective clothing 20 to the protective clothing 20 in the same manner as shown in the enlarged view "C" (partially enlarged perspective view). At this time, the adhesive 30 is melted and then hardened in a state interposed between the edge of the zipper 22 and the end (end) of the protective clothing 20, as shown in the enlarged protective clothing 20 To be attached to the same body. Accordingly, the zipper 22 is sealed in the airtight state by the adhesive 30, the connecting portion (CN) connected to the protective clothing (20).

On the other hand, the above-described lens 12 may be composed of, for example, the external lens 12a, the intermediate lens 12b, and the external lens 12c as shown in the enlarged view "a". The external lens 12a, the intermediate lens 12b, and the external lens 12c may be coated with the adhesive 12d on the edges facing each other as shown in an enlarged view. That is, the lens 12 may be composed of an external lens 12a, an intermediate lens 12b, an external lens 12c, and an adhesive 12d. More detailed description of such a lens 12 is as follows.

First, the outer lens 12a is formed to a thickness of a thin film and is attached to the hood 10 in the same manner by the adhesive 30 as shown in the enlarged view "a". At this time, the external lens 12a is attached to the hood 10 through the cover 10a as described above. Therefore, the external lens 12a is exposed to the outside air in a state of shielding the lens hole 10 '.

Next, the intermediate lens 12b is interposed between the inner lens 12c and the outer lens 12a as shown in the enlarged view "a". The intermediate lens 12b is formed to a thickness thinner than the thicknesses of the outer and inner lenses 12a and 12c to form a film.

Then, the inner lens 12c is formed to a thickness of the thin film so as to overlap with the outer lens 12a as shown in the enlarged view "a". This inner lens 12c is fixed inside the hood 10 as shown enlarged. At this time, it is preferable that the inner lens 12c is fixed by sewing on the fabric located inside the hood 10.

Finally, the adhesive 12d is applied along the edges of the intermediate lens 12b, the inner lens 12c, and the outer lens 12a, as shown in the enlarged view "a". The pressure-sensitive adhesive 12d is composed of a synthetic rubber component forming a gel so that the edges of the intermediate lens 12b and the inner lens 12c and the outer lens 12a which are in close contact with each other are fixed in a detachable state and sealed in an airtight state. It is desirable to.

Since the adhesive 12d is applied along the edges of the intermediate lens 12b, the internal lens 12c, and the external lens 12a, as shown in an enlarged view, the intermediate lens 12b, the internal lens 12c, and the external lens are Each of the parts 12a is sealed. Therefore, the edges of the intermediate lens 12b, the inner lens 12c, and the outer lens 12a are sealed in multiple stages by the adhesive 12d.

Here, the external lens 12a, the internal lens 12c, and the intermediate lens 12b described above may be formed of a soft polymer film having waterproof properties in order to secure protection against chemical components. In particular, the outer lens 12a and the inner lens 12c are made of transparent vinyl made of PVC, and the intermediate lens 12b has excellent affinity with the pressure-sensitive adhesive 12d, and changes in color even during defluorination processing. Preference is given to fluorine resins such as Teflon consisting of little PFA (Tedra fluoroethylene-perfluoroalkylvinylether copolymer) or FEP (Tedra fluorethylene-hexafluoropropylene copolymer). That is, the outer lens 12a and the inner lens 12c are made of low-cost PVC vinyl, and the middle lens 12b is preferably made of a fluorine-based resin having excellent transmittance with almost no color change to secure a watch. Do.

On the other hand, the above-described intermediate lens 12b, the inner lens 12c and the adhesive 12d are elements that are selectively employed as necessary. That is, the lens 12 may be composed only of the external lens 12a attached to the lens hole 10 'by the adhesive 30. Alternatively, the lens 12 may be composed of external and internal lenses 12a and 12c. At this time, it is preferable that the above-mentioned pressure-sensitive adhesive 12d is applied to the outer and inner lenses 12a and 12c.

In addition, at least one of the external lens 12a, the internal lens 12c, and the intermediate lens 12b may be corona-charged. Such an external lens 12a, the internal lens 12c, and the intermediate lens 12b may be used. Is hydrophilic on the surface when corona charged. Accordingly, the external lens 12a, the internal lens 12c, and the intermediate lens 12b are maximized in affinity with the aforementioned adhesive 12d. That is, the adhesive 12d has improved adhesion as the surfaces of the outer lens 12a, the inner lens 12c, and the intermediate lens 12b are converted to hydrophilicity.

Such corona charge treatment is effective only to the intermediate lens 12b when the external and internal lenses 12a and 12c described above are made of PVC vinyl and the intermediate lens 12b is made of fluorine resin. This is because the intermediate lens 12b hardly undergoes color deformation. Of course, the intermediate lens 12b is hydrophilized at once on both surfaces by corona charge treatment. Therefore, both surfaces of the intermediate lens 12b are compatible with the adhesive 12d.

Here, it is preferable that the above-described intermediate lens 12b is subjected to corona charge treatment for 22 seconds to 2 minutes and 10 seconds under conditions of 10 to 20 kHz, 2.1 to 5.3 kV, and 89 to 133 mA as a result of experiments by the applicant of the present invention. In this way, the initial lens of the intermediate lens 12b has a sharp decrease of about 20 to 30 degrees. In addition, when the intermediate lens 12b was formed of fluorine-based polymer PFA, the surface energy and the peel strength were about 36 to 40 mN / m and 4.5 kg / in as shown in Table 2 below. The intermediate lens 12b subjected to the corona charge treatment by this method obtained surface energy of about 32 to 40 mN / m and peel strength of 4.2 to 5.4 kg / in as a result of several experiments.

However, when the intermediate lens 12b made of PFA is chemically treated (Tetrahydrofurane / metallic sodium / naphthalene = 2L / 46g / 256g), not only the transparency is lowered but also the surface energy and peel strength are shown in [Table 2]. 30 to 32 mN / m and 4.3 kg / in as shown.

In addition, when the intermediate lens 12b made of PFA was treated by an etching process, defluorination occurred, and the surface energy showed 20 to 22 mN / m as shown in [Table 2], and the peel strength was not measured. .

Therefore, the intermediate lens 12b is most preferably subjected to corona charge treatment so as to ensure excellent surface energy and peel strength while ensuring transparency and hydrophilicity at the same time.

TABLE 2

number Sample Name Surface energy (mN / m) Peel Strength (kg / in) One Etching PFA 20-22 0.0 2 Chemical etched PFA 30-32 4.3 3 Corona treated PFA 36-40 4.5

In the chemical protective suit according to the embodiment of the present invention as described above, the connecting portion CN is sealed in an airtight state by the adhesive 30. In addition, when the lens 12 is composed of the outer lens 12a and the inner lens 12c and / or the intermediate lens 12b that are adhered with the adhesive 12d, the adhesive 30 includes the lens together with the adhesive 12d. Since the connection portion CN of the hood 12 and the hood 10 are sealed in stages, the connection portion CN may be sealed in multiple stages. In addition, the intermediate lens 12b may be sealed by the adhesive 12d. Since the adhesive is interposed between the 12a) and the internal lens 12c, the intermediate lens 12b can be easily replaced with a new one when the intermediate lens 12b is damaged or aged.

Furthermore, when any one of the outer lens 12a, the inner lens 12c, and the intermediate lens 12b is made of fluorine resin, more reliable transparency can be secured. Since hydrophilicity can be provided to, the adhesiveness of the adhesive 12d with respect to a lens can be improved. In particular, corona charge treatment for 22 seconds to 2 minutes and 10 seconds under conditions of 10 to 20 kHz, 2.1 to 5.3 kV, and 89 to 133 mA provides excellent contact angles, as well as surface energy of 32 to 40 mN / m and 4.2 to Peel strength of 5.4 kg / in can be obtained.

Since the above embodiments are merely illustrative of preferred embodiments of the present invention, the scope of application of the present invention is not limited to the above, and appropriate modifications are possible within the scope of the same idea. Therefore, since the shape and structure of each component shown in the embodiment of the present invention can be carried out by deformation, it is natural that the modification of the shape and structure belong to the appended claims of the present invention.

1 is a front view of a chemical protective suit according to an embodiment of the present invention; And

FIG. 2 is an enlarged front view of a portion of the chemical protective suit shown in FIG. 1. FIG.

<Description of Major Symbols in Drawing>

10: hood

10a: Lens Ball

12: Lens

12a: External lens

12b: intermediate lens

12c: internal lens

12d: adhesive

20: protective

30: adhesive

CN: Connection

Claims (16)

In the composition forming the thermoplastic adhesive, A thermoplastic adhesive composition comprising polyolefin, polyvinyl chloride, and vinyl acetate-vinyl chloride copolymer, and epoxide soybean oil, calcium stearate, triisooctyl phosphate, stearic acid, DOP, and Pb type stabilizers. The method of claim 1, The polyvinyl chloride is 10 to 50 parts by weight based on 100 parts by weight of the polyolefin; The vinyl acetate-vinyl chloride copolymer is 5 to 25 parts by weight based on 100 parts by weight of the polyolefin; thermoplastic adhesive composition, characterized in that. delete The method of claim 1, The epoxide soybean oil is 2 to 5 parts by weight based on 100 parts by weight of the polyolefin; The calcium stearate is 2 to 3 parts by weight based on 100 parts by weight of the polyolefin; The triisooctyl phosphate is 2 to 3 parts by weight based on 100 parts by weight of the polyolefin; The stearic acid is 2 to 3 parts by weight based on 100 parts by weight of the polyolefin; The DOP is 5 to 10 parts by weight based on 100 parts by weight of the polyolefin; The Pb-type stabilizer is 2 parts by weight based on 100 parts by weight of the polyolefin; thermoplastic adhesive composition, characterized in that. The method of claim 1, The polyolefin is a thermoplastic adhesive composition, characterized in that the high density or low density polyethylene of the melt viscosity (Melt index) 0.98 ~ 4.5g / 10min. The method of claim 1, The polyolefin is a thermoplastic adhesive composition, characterized in that the polypropylene of the melt viscosity index 3.5 ~ 12g / 10min. The method of claim 1, The degree of crystallinity of the polyolefin is a thermoplastic adhesive composition, characterized in that 10 to 20%. delete In chemical protective clothing to prevent the penetration of toxic chemicals, A hood comprising a lens made of a transparent material, having a lens hole shielded by the lens, and made of a non-transmissive material to prevent fluid penetration; A protective clothing made of a non-permeable material which is worn on the human body together with the hood and prevents penetration of the fluid; And According to any one of claims 1, 2 or 4 to 7, wherein the protective clothing and the hood is interposed between the connecting portions of the fabric forming the hood and sealed in a hermetic state while adhering the connecting portions. Thermoplastic adhesive; chemical protective clothing comprising a. The method of claim 9, wherein the adhesive, Chemically protective clothing, characterized in that for attaching the hood lens-side fabric overlapping the edge of the lens in the same body to the lens rim, sealing the connection portion between the hood and the lens. The method of claim 10, The hood, It is formed on the rim side fabric of the lens hole to form a portion of the hood cover is attached; further comprising, The lens, A transparent external lens of a thin film form attached to the cover of the hood by the adhesive and exposed to the outside air; A transparent material inner lens formed in a state overlapping with the outer lens and having a rim fixed to the rim of the lens hole; A transparent material intermediate lens having a thinner thickness than the inner lens and the outer lens and interposed between the inner lens and the outer lens; And And a pressure-sensitive adhesive applied along edges of the intermediate lens, the inner lens, and the outer lens. The method of claim 11, The outer lens, the inner lens and the intermediate lens is a chemical protective suit, characterized in that consisting of a soft polymer film. The method of claim 12, The outer lens and the inner lens are made of PVC vinyl; The intermediate lens is a chemical protective suit, characterized in that consisting of fluorine resin. The method of claim 12, And at least one of the outer lens, the inner lens and the intermediate lens has a hydrophilic surface by corona charge treatment. The method of claim 14, The intermediate lens is chemical protective clothing, characterized in that the corona charge treatment for 22 seconds to 2 minutes 10 seconds under conditions of 10 ~ 20kHz, 2.1 ~ 5.3kV and 89 ~ 133mA. The method of claim 15, The corona charge-treated intermediate lens is a chemical protective suit, characterized in that having a surface energy of 32 ~ 40mN / m and a peel strength of 4.2 ~ 5.4kg / in.

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