KR20100063518A - Functional polyolefin staple fiber containing phytoncide and method for fabricating the same and thermal bonding non-woven using thereof - Google Patents

Abstract

PURPOSE: Functional polyolefin-based staple fiber containing phytoncide, a manufacturing method thereof, and thermal bonded non-woven fabric using the same are provided to minimize material property degradation of the non-woven fabric, and to offer deodorization effect to the stable fiber. CONSTITUTION: A manufacturing method of polyolefin-based staple fiber containing phytoncide includes the following steps: melting polyolefin-based resin; spinning molten materials with a speed of 50-140m/min at a spinning temperature of 220-270°C; drawing the spun textured yarns with a preheating temperature of 50-80°C; adding crimp on the drawn filament; fixing functional spinning agent and liquid resin containing phytoncide on the filament; and cutting the surface-treated filament to a predetermined length.

Description

Functional polyolefin-based short fibers containing phytoncide, and a method for manufacturing the same and a thermal bond nonwoven fabric using the same {Functional polyolefin staple fiber containing phytoncide and method for fabricating the same and thermal bonding non-woven using lamb}

The present invention relates to a functional polyolefin short fiber containing phytoncide, and a method for manufacturing the same and a nonwoven fabric using the same, and a functional polyolefin short fiber containing a phytoncide as a short fiber for a nonwoven fabric that provides antibacterial and deodorizing function and a method for producing the same. It relates to the used nonwoven fabric.

In general, polyolefin-based short fibers of polyethylene, polypropylene, and copolymers thereof are widely used as a nonwoven material due to their unique low melting point and excellent chemical resistance.

These non-woven fabrics are fabrics made by adhering or tangling fiber aggregates by mechanical or chemical treatment such as mechanical manipulation or heat bonding without weaving, weaving, or knitting. They are felt, resin-bonded nonwoven fabric, needle punch, spun bond, spun lace, Emboss films, wet nonwovens and the like fall into this category. By narrowing, it means that the contact of the web (web) overlapped with the random (random) and the fiber is bonded by resin and used as a wick. Also called adhesive fabrics and bonded fabrics. Such a nonwoven fabric can be produced by various methods, such as needle punching method, chemical bonding method, thermal bonding method, melt blown method, spunlace method, stitch bond method, spunbond method is known.

Nonwoven fabric made of polyolefin-based short fibers is used for hygiene products such as napkins and diapers because the touch is soft and high strength. In particular, polypropylene short fibers are processed into thermal-bonded nonwoven fabrics through calender bonding or air-through bonding due to their unique low melting point and good chemical resistance. It is used as a cover material for nonwoven fabrics and towels, masks, filter bags for vacuum cleaners, and table cover fabrics. Therefore, antibacterial and deodorant properties are very demanded.

The polypropylene heat-adhesive nonwoven fabric of Japanese Patent Application Laid-Open No. 2002-235237 uses soft salicylic acid metal salt as a masterbatch pellet as a crystallization inhibitor to impart soft touch and high tensile strength to the nonwoven fabric. Although pursued, the experiment on spunbonded nonwoven fabric is different from the method of thermal bond nonwoven fabric through short fibers. Spunbonded nonwoven fabrics exhibit higher tensile strength than short fiber thermalbonded nonwoven fabrics, but soft touch is typically poor. In addition, according to the present technology, when the ethylene content is 1.5 wt% or more with respect to the spunbond nonwoven fabric made from the propylene / ethylene random copolymer, the crystallinity may be low and may cause a decrease in strength of the nonwoven fabric. In addition, technical solutions to antimicrobial or deodorizing properties are not disclosed.

In addition, the Republic of Korea Patent Invention No. 660067 is a green tea component characterized in that the composition containing the porous silica encapsulated with the green tea component impregnated in the fiber fabric in an amount of 50 to 100g / y, and tenter processing after drying As a manufacturing method and a functional agent of the processed fiber containing the same, using a composition containing 3 to 10% by weight of porous silica encapsulated with a green tea component, the green tea, characterized in that processed to the fabric fabric by the above method Component-containing processed fibers have been proposed. The method is complicated by the addition of an additional process for preparing porous silica, and also has a disadvantage in that the porous silica is included in the thermally processed or degraded fiber properties in the secondary processed product.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a functional polyolefin short fiber having a function of antibacterial and deodorant, a method for producing the same, and a thermal bond nonwoven fabric using the same.

In another aspect, the present invention is to provide a polyolefin short fibers and a method of manufacturing the same, and a thermal bond nonwoven fabric using the same, which can maintain the physical properties of the fibers and nonwovens.

In order to achieve the above object, the present invention provides a method for producing a polyolefin short fiber, melting the polyolefin resin, spinning the melt at a rate of 50 to 140 m / min at a spinning temperature of 220 ~ 270 ℃, Stretching the spun yarn at a draw ratio of 1.5 to 4.0, a preheating temperature of 50 to 80 ° C., crimping to impart crimp to the stretched filament, and a functional spinning oil and a phytoncide in the crimped filament. Method for producing a functional polyolefin-based short fibers containing a phytoncide comprising the surface treatment step of spraying and fixing the liquid resin, and the short-fiber forming step of cutting the surface-treated filament after heat setting to a predetermined length To provide.

In addition, the polyolefin resin provides a method for producing a functional polyolefin-based short fibers containing phytoncide, characterized in that the homo polypropylene (homo polypropylene).

In addition, the homopolypropylene has a functional polyolefin-based short fiber containing phytoncide, characterized in that the melt index (MI) is 10 to 30g / 10min, the isotactic index is 95 or more, and the melting point (DSC) is 160 to 165 ℃. It provides a method of manufacturing.

In addition, the phytoncide contained in the liquid resin provides a method for producing a functional polyolefin-based short fibers containing phytoncide, characterized in that contained in 1 to 50% by weight in the liquid resin.

The present invention also provides a method for producing a functional polyolefin-based short fiber containing phytoncide, wherein the melt further comprises at least one additive selected from the group consisting of an antioxidant, an ultraviolet stabilizer, a process stabilizer, and a colorant.

In addition, the additive provides a method for producing a functional polyolefin-based short fibers containing phytoncide, characterized in that 0.1 to 3% by weight in the melt.

In addition, in the polyolefin short fibers, a coating layer made of a liquid resin is further formed on the surface of the short fibers, and the liquid resin provides a functional polyolefin short fiber containing phytoncide, wherein the phytoncide is a mixture of a functional spinning emulsion and a phytoncide. do.

In addition, the liquid resin provides a functional polyolefin-based short fibers containing phytoncide, characterized in that the content of 0.1 to 10% by weight of the polyolefin-based short fibers are applied.

In addition, the phytoncide contained in the liquid resin provides a functional polyolefin-based short fibers containing phytoncide, characterized in that contained in 1 to 50% by weight in the liquid resin.

In addition, the polyolefin short fibers are phytoncide, characterized in that the melt index (MI) is made of homopolypropylene having a melt index (MI) of 10 to 30g / 10min, isotactic index of 95 or more, melting point (DSC) of 160 to 165 ℃ Provided is a functional polyolefin based short fiber.

Further, there is provided a functional polyolefin-based short fiber containing a phytoncide, which is produced by the above production method.

Further, a functional polyolefin-based nonwoven fabric containing a phytoncide is produced by a thermal bonding method by using the above-mentioned short fibers.

In addition, the thermal bonding method provides a functional polyolefin-based nonwoven fabric containing a phytoncide, which is a calender bonding method or an air through bonding method.

In addition, the calender bonding method is characterized in that the heat-adhesion between the fibers are produced by carding the short fibers at a speed of 80 to 150 mpm, and then making a nonwoven web while passing the web between the hot rolls set to 140 to 165 ℃ Provided is a functional polyolefin-based nonwoven fabric containing a phytoncide containing a phytoncide.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values as are indicative of preparation and material tolerances inherent in the meanings mentioned, and are intended to be accurate or to facilitate understanding of the invention. Absolute figures are used to prevent unfair use by unscrupulous infringers.

As used herein, the term "nonwoven fabric" refers to a fabric, felt, and fibrous web made by bonding or tangling fiber aggregates by mechanical or chemical treatment such as mechanical manipulation or heat bonding without undergoing weaving, weaving, or knitting. use.

Figure 1 shows a process for producing a polyolefin-based short fibers according to an embodiment of the present invention.

The present invention relates to a polyolefin short fiber for nonwoven fabric having an antibacterial and deodorizing function by containing phytoncide in the polyolefin short fiber.

Polyolefin-based short fibers according to a preferred embodiment of the present invention through the step of melting the polyolefin-based resin to make a melt, spinning step to produce a non-drawn yarn by spinning the melt and stretched and stretched filament The crimping step is followed by crimping. The crimped filament is formed of a short fiber forming step of cutting a predetermined length into a short fiber through a surface treatment step of spraying and fixing and heat-setting a liquid resin containing a functional spinning oil and a phytoncide to the fiber.

The phytoncide is a fragrant substance that the tree emits in order to protect itself from various pests and bacteria, and itself contains bactericidal and insecticidal components. The main component of phytoncide is an organic compound of Terpene family.

The chemical structure of the terpene is a hydrocarbon formed by combining two or more isoprene (C ₅ H ₈ ), and there are two isoprene monoterpenes and three sesquiterpenes. By action, about 0.01 to 5% of terpene is synthesized. Formula 1 is a chemical formula of isoprene, and Formula 2 is a chemical formula showing various chemical structures of monoterpene, and Formula 3 is a chemical formula showing various chemical structures of sesquiterpene.

These terpenes are known to have antibacterial, sedative, deodorant, stress relief and the like. Inhalation of phytoncide has been reported to significantly reduce the concentration of the cortisol, a stress hormone, and it is known that phytoncide does not cause bad odors even if the carcasses decay in the forest. In addition, it has a calming effect on the central nervous system to have a pleasant feeling, help to prolong sleep time and get a good night's sleep. In addition, it has been found to be effective in hyperlipidemia and thrombotic heart failure by improving the blood circulation system, and is also known as a strong antibacterial action that does not produce resistance in the human body. Phytoncide, a natural substance, is known to be most effective in preventing allergens without side effects because it has the effect of avoiding dust mites up to 90%.

The raw material of the fiber according to the present invention is a polyolefin resin, preferably homopolypropylene (hPP). The homopolypropylene preferably has a melt index (MI) of 10 to 30 g / 10 min, an isotactic index of 95 or more, and a melting point (DSC) of 160 to 165 ° C. The homopolypropylene short fibers may be used as a surface material of hygiene products such as diapers or sanitary napkins due to their unique low melting point and excellent chemical resistance.

In the present invention, when preparing the short fibers using the homopolypropylene is spinning at a spinning speed of about 50 to 140m / min at a spinning temperature of 220 ~ 270 ℃ appropriately adjusted between the draw ratio 1.5 to 4.0, preheating temperature 50 ~ 80 The film is stretched at < RTI ID = 0.0 > C, < / RTI > After the heat setting for about 8 to 12 minutes at a temperature of about 100 ~ 120 ℃, cut the fibers to about 30 ~ 50mm long, the final fiber fineness of 2.0 to 4.0 denier, the average elongation of 300 to 400% Polyolefin short fibers can be produced.

The liquid resin may be prepared by mixing 50 to 99% by weight of the hydrophilic spinning oil with 1 to 50% by weight of the phytoncide.

The hydrophilic spinning oil may be machine oil, liquid paraffin, white oil, etc. as mineral oil and synthetic oil-based lubricant as an oil to smooth the fiber manufacturing process.

In addition, to improve the functionality of the polyolefin-based short fibers prepared by adding at least one additive selected from the group consisting of antioxidants, ultraviolet stabilizers, process stabilizers, colorants to the melt melted polyolefin resin such as homopolypropylene. Or color in short fibers.

The liquid resin will preferably be applied to the short fiber content of 0.1 to 10% by weight of the polyolefin-based short fibers.

The additive should be added in an appropriate amount depending on the type added, preferably within 3% by weight, more preferably 0.1 to 1.5% by weight in the melt.

When a short fiber is produced by the method according to a preferred embodiment of the present invention, a thermal bond process for manufacturing a nonwoven fabric may be performed. The thermal bonding method may be performed using a calendar bonding method and an air through bonding method. Calender bonding method is to produce a non-woven web after carding short fibers at a speed of 80 to 150 mpm, and the heat-adhesion between the fibers is produced as the web passes between hot rolls set to about 140 ~ 165 ℃ Can be. In this case, the basis weight of the nonwoven fabric is preferably 20 to 40 gsm.

On the other hand, if foreign matters are attached to the surface of the fiber, bubbles are generated when it is fixed, which may cause deterioration of properties of the nonwoven fabric.

In the present invention, in manufacturing a thermal bond nonwoven fabric through a calender bonding facility, the hot roll temperature of hot roll is most suitable for the nonwoven fabric production rate, the shape of the embossed pattern of the roll, the difference between the roll setting temperature and the surface temperature, and the like. It is not an absolute result but a relative result because it may vary depending on the production equipment conditions of the calender bonding method and the fineness of the short fibers used as raw materials.

As described above, the polyolefin-based short fibers containing the phytoncide according to the present invention, the preparation method thereof, and the thermal bond nonwoven fabric using the same exhibit excellent antibacterial and deodorizing properties.

In addition, the short fiber according to the present invention minimizes the deterioration of physical properties of the nonwoven fabric due to the addition of phytoncide to the nonwoven fabric by thermal bonding, thereby reducing the physical properties of the final product, and the antimicrobial and deodorizing properties of the conventional polyolefin short fibers do not have. Has

Therefore, the short fibers and nonwoven fabrics according to the present invention are not only suitable for hygiene products such as diapers, sanitary products, wet tissues, etc., but also have antibacterial and deodorizing properties, and thus can be applied as hygiene products having excellent functionality with prevention and deodorization of pathogens. have.

1. Preparation of Polyolefin Short Fibers

Example 1

 A non-stretched yarn was prepared with a homopolypropylene resin having a MI of 10 to 30 g / 10 min and an I.I of 95 or more at a spinning temperature of 250 ° C. and a spinning speed of 80 m / min.

The unstretched yarn is appropriately controlled at a draw ratio of 1.5 to 4.0, stretched at a preheating temperature of 70 ° C. to impart crimping in the crimper, and a liquid resin containing a hydrophilic spinning oil and a phytoncide is sprayed to give the phytoncide to the total short fiber weight. It adhered to the fiber surface to 1 weight%.

After the liquid resin is fixed, heat-fixed at about 100 to 120 ° C. for about 8 to 12 minutes, the fiber is cut to 40 mm in length, and the final fiber fineness is 2.0 to 4.0 denier, and the average elongation is polyolefin to 300 to 400%. Short fibers were prepared.

Example 2

Work was carried out in the same manner as in Example 1, but was performed by changing the ratio of the phytoncide liquid resin sprayed on the homopolypropylene resin.

The phytoncide was fixed to the fiber surface such that the weight was 2% by weight based on the total weight of the short fibers.

Comparative Example 1

Operation was carried out in the same manner as in Example 1, except that only the hydrophilic spinning oil except the phytoncide was sprayed onto the homopolypropylene resin.

2. Preparation of Polyolefin Thermal Bonding Nonwoven Fabric

Each non-woven web of polyolefin short fibers obtained by the above method was carded at a speed of 115 mpm to prepare a calender-bonded nonwoven fabric having a basis weight of 20 to 40 gsm by passing through two hot rolls.

At this time, while the temperature of the hot roll to 140 ~ 165 ℃ to find the hot-opening temperature (hereinafter referred to as the optimum hot roll temperature) of the most excellent tensile strength of the nonwoven fabric and measured the physical properties.

* Method of Analysis

1. Melt Index (MI): According to ASTM D 1238

* Homopolypropylene and random copolymer series: 230 ℃, 2.16kg load

* PE series such as HDPE, LDPE: 190 ℃, 2.16kg load

2. Isotactic Index (I.I): ISO 9113: 1986... Plastics-Polypropylene (PP) and propylene-copolymer thermoplastics-Determination of isotactic index: After boiling normal heptane to melt the atactic component, the remaining isotactic component is weighed and expressed as wt%, and the weight percent isotactic index It is called.

3.Xylene Soluble (hereinafter referred to as XS): ISO 16152: 2005

4. Radioactivity: Evaluated by measuring the number of fiber breaks and the number of spin drops occurring under the detention of 37,125 holes.

Only one round or drop is less than one time: ◎

However, trimming or dropping is 1 ~ 3 times / time: ○

Only three times / time of drop or drop: △

No radiation: ×

5. Elongation: Evaluated by the number of trimming in the softening process

Less than 1 time / hour: ○, 1 ~ 2 times / time: △, More than 3 times / hour: ×

6. Crimping workability: The number of times that the tow that has been visually observed and drawn fails while passing through the crimper.

Less than 1 time / hour: ○, 1 ~ 2 times / time: △, More than 3 times / hour: ×

7. Single fiber fineness: Determination of fineness based on ASTM D1577

8. Non-woven carding property: When short fiber passes through the carding machine, curling or flying phenomenon occurs between card rolls, or it is judged as bad when the web formation is not good.

9. Basis weight: weight of nonwoven fabric (g / ㎡)

10. Nonwoven fabric tensile strength and elongation: cut-strip method of JIS L 1096 (sample width 5cm, length 14cm)

MD: Machine direction of nonwoven fabric / CD: Transverse direction of nonwoven fabric

11.TBI (Thermal Bondability Index) = √ {(MD Strength × CD Strength)} × (20 / Basic Weight)

division
weight Strength (kg / 5cm) Shinto (%) g / ㎡ MD CD MD CD Example 1 22.0 4.74 1.47 60 100 Example 2 22.0 4.78 1.45 60 100 Comparative example 22.0 4.75 1.46 60 100

Table 1 is an evaluation of the properties of the nonwoven fabrics prepared from the above examples and comparative examples, the nonwoven fabric made of polyolefin-based short fibers containing phytoncide according to the present invention almost changes in the strength and elongation of the nonwoven fabric even if phytoncide is added It can be seen that there is no.

division Comparative example Example 2
Strain 1
Initial strain 1.5X10 ⁵ 1.5X10 ⁵ 24 hours later 6.8X10 ⁶ Less than 10 increase 45 times increase 99.9% decrease
Strain 2
Initial strain 1.5X10 ⁵ 1.5X10 ⁵ 24 hours later 7.2 X 10 ⁶ Less than 10 increase 48x increase 99.9% decrease
Strain 3
Initial strain 1.4 X 10 ⁵ 1.3 X 10 ⁵ 24 hours later 6.8X10 ⁶ Less than 10 increase 49 times increase 99.9% decrease

* Inoculation bacterial concentration: Strain 1-1.5X10 ⁵ / ml

Strain 2-1.5X10 ⁵ / ml

Strain 3-1.4X10 ⁵ / ml

* Type of nonionic surfactant: TWEEN 80 (0.05%)

* Exam conditions

-Test bacteria after shaking culture at 35 ± 1 ℃ for 24 hours (number of shaking 150 times / min)

-Sample surface area 60cm ²

Neutralization solution: Phosphate buffer solution (pH 7.0 ± 0.2)

Test strain used: Strain 1 Escherichia coli ATCC 25922

Strain 2 Staphylococcus aureus ATCC 6538

Strain 3 Candida albicans ATCC 14053

* Testimonials

The non-woven fabrics prepared in Example 2 and Comparative Example 1 were prepared into the inside, and the materials were secreted every day, and the moisturizing effect when worn was tested for 20 people between 20 and 40 years old. Two target groups were worn to cross Example 1 and Comparative Example 1, respectively.

Table 2 is an evaluation of the antimicrobial properties of the nonwoven fabrics prepared from the above examples and comparative examples, it can be seen that the antimicrobial properties of the nonwoven fabric made of polyolefin-based short fibers containing phytoncide according to the present invention is very excellent.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

1 is a flow chart of the manufacturing process of the polyolefin-based short fibers according to an embodiment of the present invention.

Claims (14)

In the method for producing a polyolefin short fiber, Melting a polyolefin-based resin; Spinning the melt at a rate of 50 to 140 m / min at a spinning temperature of 220 to 270 ° C .; Stretching the spun untwisted yarn at a draw ratio of 1.5 to 4.0 and a preheating temperature of 50 to 80 ° C; Crimping to impart crimp to the stretched filaments; A surface treatment step of spraying and fixing a liquid resin containing a functional spinning oil and a phytoncide to the crimped filament; And Method for producing a functional polyolefin-based short fibers containing a phytoncide, characterized in that it comprises a short fiber forming step of cutting the surface-treated filament after heat setting to a predetermined length. The method of claim 1, The polyolefin resin is a method for producing a functional polyolefin short fiber, characterized in that it contains a phytoncide of homo polypropylene (homo polypropylene). The method of claim 2, The homopolypropylene has a melt index (MI) of 10 to 30g / 10min, an isotactic index of 95 or more, and a melting point (DSC) of 160 to 165 ℃ manufacturing of the functional polyolefin-based short fibers containing phytoncide Way. The method of claim 1, The phytoncide contained in the liquid resin is a method for producing a functional polyolefin-based short fiber containing phytoncide, characterized in that contained in 1 to 50% by weight in the liquid resin. The method of claim 1, Method for producing a functional polyolefin-based short fibers containing phytoncide, characterized in that the melt further comprises at least one additive selected from the group consisting of antioxidants, UV stabilizers, process stabilizers, colorants. The method of claim 5, The additive is a method for producing a functional polyolefin-based short fibers containing phytoncide, characterized in that 0.1 to 3% by weight in the melt. In the polyolefin short fiber, The coating layer made of liquid resin is further formed on the surface of the short fiber, The polyolefin-based short fibers containing phytoncide, characterized in that the liquid resin is a mixture of a functional spinning oil and a phytoncide. The method of claim 7, wherein The liquid resin is a functional polyolefin-based short fibers containing phytoncide, characterized in that the content of 0.1 to 10% by weight of the polyolefin-based short fibers. The method of claim 7, wherein The phytoncide contained in the liquid resin is a functional polyolefin-based short fiber containing phytoncide, characterized in that contained in 1 to 50% by weight in the liquid resin. The method of claim 7, wherein The polyolefin-based short fibers contain a phytoncide, characterized in that the melt index (MI) is made of homopolypropylene having a melt index (MI) of 10 to 30g / 10min, an isotactic index of 95 or more and a melting point (DSC) of 160 to 165 ℃ Functional polyolefin short fiber. A functional polyolefin-based short fiber containing a phytoncide, which is produced by the method according to any one of claims 1 to 6. The functional polyolefin type short fiber manufactured by the method of any one of Claims 1-6, or the short fiber of any one of Claims 7-11 is manufactured by the thermal bonding method, It characterized by the above-mentioned. Functional polyolefin-based nonwoven fabric containing phytoncide. The method of claim 12, The thermal bonding method is a functional polyolefin-based nonwoven fabric containing a phytoncide, characterized in that the calendar bonding method or air-through bonding method. The method of claim 13, The calender bonding method is characterized in that the heat-adhesion between the fibers are produced by carding short fibers at a speed of 80 to 150 mpm, and then making a nonwoven web while passing the web between hot rolls set at 140 to 165 ℃. Functional polyolefin-based nonwoven fabric containing phytoncide.

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