KR100468909B1 - Manufacturing method of polypropylene fiber for antibacterial carpet - Google Patents

Abstract

The present invention relates to a method for producing a polypropylene fiber for antimicrobial carpet, the poly for fibers having a melt flow index (Melt Index: MI) 12 ~ 16g / 10 minutes (measured at 230 ℃) consisting of more than 99 mol% polypropylene component It is characterized by kneading and spinning silver-based zinc oxide (Zino Oxide) as a inorganic antibacterial agent to a propylene resin and producing a carpet by a conventional method. The polypropylene fiber produced by the present invention has excellent antibacterial and excellent antimicrobial laundry durability. Therefore, it can be very usefully used as a yarn for manufacturing household carpet.

Description

Method for producing polypropylene fiber for antimicrobial carpet

The present invention relates to a method for producing polypropylene fiber for antimicrobial carpet, and more particularly, polypropylene BCF (Bulk Continuous) for antimicrobial carpet using a mixed composition of silver-based zinc oxide as a polypropylene resin for inorganic fibers and an inorganic antimicrobial agent. Filament) relates to a method for producing a fiber.

In general, polypropylene resins are used in large quantities in various fields due to their low price. In addition, there are many kinds of fibers and molded products, and the thin ones are widely used as coating materials, beddings, medical sanitary materials, filters, packaging, etc., and the thick ones are widely used as oil absorbers, road construction, civil engineering materials for improvement of ground. do. BCF (Bulk Continuous Filament) made based on the above polypropylene fiber is light, has excellent chemical resistance, low hygroscopicity, light fastness and low cost, and is widely used as an indoor or outdoor carpet yarn.

On the other hand, there are a myriad of microorganisms in our surroundings, and as the living environment becomes more favorable, the interior materials and building materials used in our homes recently use highly confidential materials, and at the same time, air conditioners are also widely supplied, so microorganisms propagate. In the following, as the environment is appropriate, the growth of mold and bacteria in the home is increasing. Therefore, researches for providing antimicrobial properties to polypropylene fibers are actively underway.

As a method to give antimicrobial to existing BCF, spraying of antimicrobial agent is sprayed in post-treatment method during BCF manufacturing process, but it is difficult in process operation, durability decrease by friction or washing, and human body There is a problem with respect to stability.

In addition, researches applying organic antimicrobial agents have been carried out using a quaternary ammonium salt salt system such as Japanese Patent Application Laid-Open No. 62-42715 or a deacetylate of chitin such as Japanese Patent Application Laid-Open No. 4-272273. It is easy to cause decomposition and evaporation to heat, so it lacks heat resistance, stability to the human body and laundry durability, and particularly has a defect in being yellowed when using a chlorine-based detergent, and in Korean Patent Application Publication No. 93-04540, a zeolite which is a porous inorganic material Although a method of using an antimicrobial agent that ion-exchanges antimicrobial metal ions such as copper or silver in (Zeolile) is becoming common, drawbacks such as deterioration of physical properties and poor color due to the water adsorption characteristics of zeolite itself.

It is an object of the present invention to provide a polypropylene fiber for antimicrobial carpet which has long lasting antimicrobial effect and excellent tensile strength, elongation and weather resistance.

The present invention is a polypropylene resin having a melt flow index (Melt Index, measured at 12 ~ 16g / 10 minutes, 230 ℃) and the inorganic zinc-based zinc oxide (Zinc Oxide) in the production of a mixture It consists of melt spinning the mixture which consists of 0.1-5 weight part of silver zinc oxides with respect to 100 weight part of propylene resins.

Hereinafter, the present invention will be described in detail.

The polypropylenes used in the present invention are all crystalline polypropylenes comprising 99 mol% or more of polypropylene components, and the number average molecular weight is 7,000 to 800,000, more preferably 10,000 to 700,000, and 0 to 1 mol% ethylene in this resin. Ingredients may be included.

In the present invention, the molecular weight of the modified polypropylene may be changed depending on the purpose and the physical properties of the final carpet, and cannot be quantified.

Synthesized polypropylene used in the present invention is reacted in the presence of a combination catalyst with titanium trichloride and alkylaluminum compounds, commonly referred to as ZIegier-Natta type catalyst, to a temperature of 0 ℃ to 300 ℃ Although it can be carried out over, it is usually suitable to act in the range of 0 ° C to 100 ° C for the reason that a polymer having high stereoregularity is not obtained at 100 ° C or higher in the high-stereoregular polymerization of propylene. .

There is no restriction | limiting in particular regarding polymerization pressure, The pressure of 3-100 atmosphere is preferable at the point of industrial and economical use. In the polymerization method, slurry polymerization with an inert hydrogen carbonate solvent such as butane, pentane, heptane, and octane, solvent polymerization synthesized in a state in which the resulting polymer is dissolved in this inert hydrogen carbonate solvent, and liquefied multimer with no solvent Bulk polymerization and gas phase synthesis in gaseous monomers are possible.

In the present invention, silver-based zinc oxide (using Zeloc by Du Pont) is prepared by mixing in a color master batch used at the time of primary deposition. The inorganic zinc antimicrobial agent may be added in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of polypropylene resin, and most preferably 0.5 to 3 parts by weight. If less than 0.1 parts by weight of the antimicrobial properties are poor, exceeding 5 parts by weight causes poor color tone and physical properties of the carpet is disadvantageous in terms of economics.

As described above, according to the present invention, when a mixed spinning of a polypropylene resin and a silver zinc oxide, which is an inorganic antimicrobial agent, a yarn for carpet having excellent antimicrobial properties can be produced.

Hereinafter, the present invention has been described in more detail with reference to Examples, but is not limited to the Examples of the present invention.

<Example 1>

1 part by weight of silver-based zinc oxide was mixed with 100 parts by weight of the polypropylene resin having a melt flow index of 15 mol% or more consisting of the polypropylene component. The resin composition was melt spun in a spinning pack at a melting temperature of 250 ° C. to maintain a draw ratio of 3, a stretching temperature of 100 ° C., and a texturing temperature of 150 ° C. to obtain 1200D / 80F of BCF yarn. Carpet was prepared by a conventional method using the obtained BCF company, the physical properties are measured and the results are shown in Table 1 below.

<Example 2>

Carpet was prepared in the same manner as in Example 1, except that 3 parts by weight of silver-based zinc oxide was mixed with 100 parts by weight of polypropylene resin having a melt flow index of 15 mol% or more. The physical properties were measured and the results are shown in Table 1 below.

Comparative Example 1

Except for using a polypropylene resin having a melt flow index of 15 mol% or more of the above 99 mol% polypropylene component was produced in the carpet in the same manner as in Example 1 and the results are shown in Table 1 below.

Comparative Example 2

Carpets were manufactured in the same manner as in Example 1, except that 10 parts by weight of silver-based zinc oxide was used based on 100 parts by weight of the polypropylene resin having a melt flow index of 15 mol% or more made of a polypropylene component. The physical properties were measured and the results are shown in Table 1 below.

The various physical property evaluation methods used in the Examples and Comparative Examples are as follows.

※ Antibacterial evaluation: Shake Fianaqjq (Japanese Textile Products Sanitary Processing Association official standard) Measured by the uniformity rate (used strain: ATCC 6538)

※ Wash durability: Wash durability evaluation after 50 times based on JIS L-029

* Melt Flow Index: According to ASTM D-1238, polypropylene resin is measured at 230 ℃ and 2.16 Kg.

※ Tensile strength and elongation of fiber: evaluated based on strip method of JIS L-1096

* Weather resistance evaluation: Based on ASTM G-26 standard, it was judged by gray scale whether or not discoloration by weather-0-meta (Weather-0meter). In case of grade 5, there is no color change.

TABLE 1

As in the present invention, silver zinc oxide is 0.1 as an inorganic antibacterial agent based on 100 parts by weight of a polypropylene resin for fibers having a melt flow index (Meit index: MI) of 12 to 16 g / 10 minutes (measured at 230 ° C.). Polypropylene fiber prepared by mixing to 5 parts by weight is excellent in antimicrobial and excellent antimicrobial wash durability, it can be very useful as a yarn for household carpet production.

Claims (1)

In the conventional method for producing an antimicrobial fiber that is spun by adding an inorganic antimicrobial agent to a synthetic resin, a fiber having a melt flow index (Melt Index) of 12-16 g / min (measured at 230 ° C.) of 99 mol% or more of polypropylene as a synthetic resin A method for producing a polypropylene fiber for an antimicrobial carpet, wherein the polypropylene resin is used, and 0.1-5 parts by weight of silver zinc oxide is used as an inorganic antibacterial agent based on 100 parts by weight of the resin.