KR20120122822A - Preparation of ultra high molecular weight polyethlene fiber - Google Patents

Abstract

PURPOSE: A method for fabricating a polymer solution for a filament yarn is provided to enhance durability, strength, abrasion resistance, and antibacterial property. CONSTITUTION: A method for fabricating a polymer solution for functional filament yarn comprises a step of inorganic materials with solid powder and preparing polyvinyl alcohol filament yarn. The inorganic material is MMT(montmorillonite), carbon nanotube(CNT), and silver nanoparticles. [Reference numerals] (AA) Distilled water + inorganic materials; (BB) PVA(1700 of number-average polymerization degree, 99% of saponification); (CC) Preparing complex solution; (DD) Fabricating filament yarn; (EE) Drying spinning

Description

{Preparation of ultra high molecular weight polyethlene fiber} processed into tear reinforcing solution

The present invention is to prepare a polymer solution of the functional filament yarn required for weaving ultra-high strength mixed fabrics, strength, stiffness, barrier properties, wear resistance, high temperature weaving together with the existing ultra high molecular weight polyethylene (UHMWPE) filament yarn The present invention relates to a method for producing a polymer solution in which an inorganic material exhibiting unique functionality such as stability is incorporated.

In various technical fields such as metal industry, ceramic industry, marine industry, transportation industry, medical equipment industry, automobile industry, packaging industry, pharmaceutical industry, etc., friction, abrasion resistance, chemical resistance, aging resistance, ozone resistance, surface temperature resistance, Ultra high molecular weight polyethylene (UHMWPE) is attracting attention as a polymer material that meets these demands in a situation where there is a continuing demand for polymer products having excellent properties regarding weakening properties, low water absorption and resistance to water at elevated temperatures. have. Ultra high molecular weight polyethylene (UHMWPE) is known to have the strongest impact resistance among commercialized synthetic resins, and has excellent wear resistance, chemical resistance, and heat resistance, and is applied in various industrial fields.In particular, ultra high strength such as bulletproof clothes, helmets, porous filters, riding clothes, industrial work clothes, etc. Used in demanding fields.

In particular, clothing made of ultra high molecular weight polyethylene (UHMWPE) may be suitably used in a field that serves to protect the human body by exerting an ultra high strength function in an environment exposed to the outside such as a motorcycle garment. However, despite these advantages, ultra-high molecular weight polyethylene (UHMWPE) is currently expensive and is worn alone due to excessive strength when weaving, and the mass production is limited, so weaving together with filament yarns showing higher strength than weaving alone is limited. If the fabric is made of fabrics, it will be possible to mass produce relatively low cost while maintaining the existing ultra high strength to some extent.

Types of high strength polymers that can be woven into mixed fabrics with ultra high molecular weight polyethylene (UHMWPE) filament yarn include Polyethylene terephthalate (PET), Nylon, Polyparaphenylene Terephthalamid (PPTA), High Strength PolyEthylene (HSPE), High density poly ethylene (HDPE), Polybenzoxazole (PBO), Poly (p-phenylene benzobisthiazole (PBZT), Poly para phenylene telephthalamide (PPTA), (Poly (pyridobisimidazole) (PIPD)), Polyacrylate, Polyethylene2,6-Naphthalate (PEN), among them polyvinyl alcohol ( poly (vinyl alcohol) (PVA)) is a polymer obtained by hydrolyzing polyvinylacetate (PVAc), which is a representative water-soluble polymer, and has good radioactivity, and can be manufactured by filament yarn by dry, wet, and wet methods. In addition, it is already mass-produced as a filament yarn for clothing due to its excellent strength, heat resistance, durability, and chemical resistance.

Recently, with the development of nanotechnology, research on polymer composite materials incorporating nano-size inorganic materials into polymer materials has been actively conducted. When inorganic materials having unique functionalities are incorporated into polymer materials, conductivity, which has not been achieved by conventional polymer materials, It can exhibit functions such as heat resistance and antibacterial properties. Among various polymer composite technologies, the technology of polyvinyl alcohol composites has already been reported in the journal of Applied Polymer Science, 113, 2009, 18601867. Looking at the results, the tensile strength and thermal The improvement of a characteristic can be observed. Inorganic materials used as functional fillers include silica, mica, montmorillonite, kaolinite, asbestos, talc, diatomaceous earth, natural and synthetic Natural and synthetic zeolites, cement, clay, sodium aluminum silicate, aluminum polysilicate, alumina silica gels and glass particles Siliceous fillers such as) are available. In addition to the siliceous fillers, other particulate substantially water-insoluble fillers may also be used. Examples of such optional fillers are carbon black, activated carbon, carbon fibers, charcoal, graphite, titanium oxide, iron oxide. Copper oxide, zinc oxide, lead oxide, tungsten, antimony oxide, zirconia, magnesia, alumina, carbonic acid Calcium carbonate, and magnesium carbonate.

Nanocomposite technology can obtain excellent physical properties even with a small amount of inorganic fillers, and it can give new functions such as maximizing mechanical properties and permeation inhibition ability by peeling and dispersing the reinforcing agent to nano size, and in terms of performance / cost It is advantageous. Based on these characteristics, weaving ultra-high molecular weight polyethylene (UHMWPE) filament yarn and polyvinyl alcohol composite filament yarn mixed with inorganic materials into a mixed fabric enables mass production of garment fabrics while reducing costs.

Fabrication methods include weaving, knitting, lace and braid production, nonwoven fabrics, among which weaving manufactured using a loom is the most widely used. Types of such looms include vertical looms, circular looms, gripper looms, needle looms, air jet looms, and water jet looms. Among them, rapier looms have no drums and finger-shaped knives are weaved through wefts. It is suitable for mass weaving of filament yarn because it is moved to the opposite side.

Republic of Korea Patent Invention No. 10-2009-0101766 relates to a method for producing an ultra high strength polyethylene fiber and to an ultra high strength polyethylene fiber prepared therefrom, the production method is a weight average molecular weight of 200,000 to 5 million polyethylene of non-volatile organic compounds Mixing with the first solvent to form a gel solution having an inherent viscosity of 17 to 23 dl / g; Spinning the gel solution with a die to form gel fibers; Immersing and cooling the gel fibers in a second solvent of a liquid volatile organic compound having a high temperature near a volatilization point; And extracting the first solvent by jet-jetting a second solvent of a gaseous volatile organic compound to the cooled gel fibers and simultaneously stretching the gel fibers in a draw ratio of 30: 1 to 50: 1.

In addition, Korean Patent Invention No. 10-2005-0122424 relates to a method for producing polyvinyl alcohol fibers, wherein dope is prepared by mixing polyvinyl alcohol (PVA), polyacrylonitrile (PAN) and a solvent; (B) a method for producing a high strength polyvinyl alcohol fiber having a heat resistance comprising the step of spinning and hot stretching the dope in a dry and wet method.

The present invention is a method for solving the problem of the high cost and ultra-high strength wear caused by the conventional ultra-high molecular weight polyethylene (UHMWPE) fabric manufacturing to exhibit high functionality such as strength, stiffness, barrier properties, wear resistance, high temperature stability An object of the present invention is to provide a method for producing a polymer composite solution using filament.

In order to achieve the above object, the present invention is an inorganic material of 5-20 wt.% Of polyvinyl alcohol (number average degree of polymerization of 1700, 99% of saponification degree), 1-20 wt.% Of polyvinyl alcohol solids, which is a high strength and representative water-soluble polymer. It provides a method for preparing a high functional polymer composite solution comprising a.

When the polyvinyl alcohol composite solution prepared according to the present invention is manufactured with filament yarn, effects such as high strength, durability, abrasion resistance, and antibacterial properties, adsorption, and high temperature stability, which are characteristics of polyvinyl alcohol, can be expected at the same time.

Figure 1 shows a polyvinyl alcohol composite filament yarn manufacturing process according to an embodiment of the present invention.
Figure 2 is a polyvinyl alcohol composite solution (a) silver nanoparticles mixed with an inorganic material prepared according to an embodiment of the present invention, (b) montmorillonite, (c) carbon black photograph.
3 is a structural diagram of the mixed weaving of polyvinyl alcohol composite filament yarn and ultra high molecular weight polyethylene (UHMWPE) filament yarn prepared according to an embodiment of the present invention.
4 is a transmission electron microscope photograph of a polyvinyl alcohol complex solution containing an inorganic material prepared according to an embodiment of the present invention.

The present invention relates to a method for preparing a solution of polyvinyl alcohol filament yarn in which an inorganic material for mixing and weaving with ultra high molecular weight polyethylene (UHMWPE) filament yarn is incorporated. When explaining the embodiment of the present invention by the accompanying drawings as follows.

Figure 1 shows a process for producing a polyvinyl alcohol filament yarn of the present invention, Figure 2 is a picture of a polyvinyl alcohol composite solution prepared according to an embodiment of the present invention, Figure 3 according to an embodiment of the present invention After the polyvinyl alcohol composite solution is spun into filament yarn, the structure is mixed and woven with ultra high molecular weight polyethylene (UHMWPE) filament yarn. FIG. 4 is a permeation rate of the polyvinyl alcohol composite solution in which the inorganic material prepared according to the embodiment of the present invention is incorporated. Electron micrograph.

Referring to FIG. 1, inorganic materials used to prepare a polyvinyl alcohol composite solution according to the embodiment of the present invention include montmorillonite (montmorillonite, MMT), carbon nanotubes (CNT), and silver nanoparticles (Ag). ) And can be manufactured either alone or in combination of two or more kinds of inorganic materials.

Production Example 1

5 to 20 wt.% Of a polyvinyl alcohol solution was prepared by performing high speed agitation at 80 ° C. for 2 h at a rate of 5700 g of number average degree of polymerization of 1700 and saponification degree of 99% polyvinyl alcohol per 90 ml of distilled water. A proper amount of polyvinyl alcohol is added twice or three times along the water column of distilled water rotating at high speed. When the color of the opaque solution became completely transparent, the temperature was slowly reduced to 25 ° C to confirm the residue to prepare a polyvinyl alcohol solution.

Example 1

5 wt.% Of montmorillonite (thickness 1-3 nm, width 5-10 nm) relative to polyvinyl alcohol per 90 ml of distilled water was added first, followed by stirring at 25 ° C. for 30 minutes, and then polyvinyl alcohol was added thereto. Inorganic material composite solution was prepared and the remaining conditions are the same as in Preparation Example 1.

Example 2

5 wt.% Of montmorillonite, carbon nanotube, and carbon surfactant 1wt.% Relative to polyvinyl alcohol per 90 ml of secondary distilled water were first stirred at 25 ° C. for 30 minutes, and then polyvinyl alcohol was added to A composite material solution was prepared, and the remaining preparation conditions were the same as in Preparation Example 1.

Example 3

5 wt.% Of montmorillonite, carbon nanotubes, silver nanoparticles (5-10 nm) and 1 wt.% Of carbon surfactant were added to 90 ml of polyvinyl alcohol per 90 ml of secondary distilled water, followed by stirring at 25 ° C. for 30 minutes. The inorganic material composite solution was prepared, and the remaining production conditions were the same as in Preparation Example 1.

Comparative Example 1

The inorganic material was prepared in the same manner as in Example 1 except that the polyvinyl alcohol was completely dissolved and then added. Evaluation of the physical properties of the prepared solution is shown in Table 1.

Comparative Example 2

Except for the addition of the carbon surfactant was prepared in the same manner as in Example 2. Evaluation of the physical properties of the prepared solution is shown in Table 1.

Comparative Example 3

Except that the inorganic material and polyvinyl alcohol at the same time was prepared in the same manner as in Example 3. Evaluation of the physical properties of the prepared solution is shown in Table 1.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Inorganic material composite shape observation Good Good Good Bad Bad Bad

* Transmission electron microscope (TEM), 20,000 times

The polyvinyl alcohol composite solution according to the embodiment of the present invention was successfully prepared, and the results of the mixed state of the inorganic material are shown in Table 1. When the composite solution prepared according to the embodiment is spun and manufactured by filament yarn, it exhibits conductivity by addition of carbon black or carbon nanotubes, thereby exhibiting antistatic effect, exhibiting antibacterial effect by containing silver and gold nanoparticles, and addition of montmorillonite. The effect of improving the thermal characteristics can be expected. That is, when one or more inorganic materials are properly combined with the polymer filament yarn, the polymer can exhibit the function that the polymer does not have and maintain the function after weaving.

Weaving method of ultra high molecular weight polyethylene (UHMWPE) filament yarn and polyvinyl alcohol filament yarn manufactured based on existing patents and related technologies prepares ultra high molecular weight polyethylene (UHMWPE) filament yarn on a slope where strength and drape properties are exhibited. In the weft yarn, the polyvinyl alcohol filament yarn is prepared, and the general filament yarn weaving preparation process, that is, the winding, the diameter and protection, the preparation process of the diameter. The prepared warp yarns and weft yarns can be made into a variety of fabrics of plain weave, twill weave or deformed runners through the process of weaving, uplifting, body needle, warp and weaving. It may be.

Hereinafter, the present invention is not limited to the above specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes are within the scope of the claims.

100: polyvinyl alcohol composite filament yarn
200: ultra high molecular weight polyethylene (UHMWPE) filament yarn

Claims (1)

In the preparation of the polymer solution using functional filament, the step of producing a polyvinyl alcohol filament yarn incorporated so that the inorganic material to the solid content is 10 to 20 wt.%.

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