KR20130039501A - Functional polyolefin staple fiber and method for fabricating the same and thermal bonding non-woven using thereof - Google Patents

Abstract

PURPOSE: A functional polyolefin-based staple fiber, a method for fabricating the same, and a non-woven fabric using the same are provided to minimize factors which reduces the physical property of the non-woven fabric, and to prevent allergy and inflammation. CONSTITUTION: A method for fabricating a functional polyolefin-based staple fiber comprises: a step of fusing polyolefin-based resin; a step of spinning the fused resin at 230-290 deg. C and at 50-100 m/min; a step of drawing the spun microfiber at a drawing ratio of 0.5-3.0; a step of applying shrinkage to the drawn filament; a step of spraying liquid resin and fixing; and a step of fixing the filament by heat and cutting in a predetermined length. [Reference numerals] (AA) Fusing step; (BB) Spinning step; (CC) Drawing step; (DD) Crimping step; (EE) Surface treating step; (FF) Filament forming step;

Description

Functional polyolefin-based short fibers and a method of manufacturing the same and nonwoven fabrics thereof {Functional polyolefin staple fiber and method for fabricating the same and thermal bonding non-woven using

The present invention relates to a functional polyolefin-based short fibers having a sterilization, disinfection and antibacterial, and a method for producing the same and a nonwoven fabric using the same. It relates to a manufacturing method and a nonwoven fabric using the same.

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 excellent chemical resistance.They are disposable disposable diapers for adults, disposable diapers for adults, feminine hygiene products, hygienic nonwoven fabrics and medical grades. It is widely used for nonwoven fabrics and towels.

The non-woven products have been studied a lot of ways to improve the touch and increase the strength of contact with the skin and to improve the antibacterial or deodorant. These methods include the addition of salicylic acid metal salts into the masterbatch pellets as crystallization inhibitors to improve the feel and strength through the fineness, and impregnating the fiber-containing composition containing the encapsulated porous silica into the fabric and drying it. The method of tenter processing, the method of apply | coating silver particle to a fiber surface, the method of including ocher in a polyolefin fiber manufacturing process, and the method of improving antibacterial property and deodorization property, etc. were mentioned.

However, the products released by using the non-woven fabric manufactured by the above methods are disposable diapers for adults, disposable diapers for adults, feminine hygiene products, hygiene or medical use, which have long contact time with the skin, and are used for children with soft skin or wounds. Since there are many products used on the site or sensitive skin, methods and products that can minimize skin irritation, prevent and alleviate allergic reactions or inflammation have not been developed yet. Development is urgent.

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 non-toxic skin irritation and preventing allergic reactions and inflammation, a manufacturing method thereof, 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 a polyolefin resin; Spinning the melt at a rate of 50 to 100 m / min at a spinning temperature of 230 to 290 ° C .; Stretching the spun yarn at a draw ratio of 0.5 to 3.0; Crimping to impart crimp to the stretched filaments; A surface treatment step of spraying and fixing the functional spinning oil and the herbal extract and the green tea extract or the liquid resin containing the herbal extract and the functional additive which is alum to the crimped filament; And it provides a method for producing a functional polyolefin-based short fibers, characterized in that it comprises a short fiber forming step of cutting the surface-treated filament after heat setting to a predetermined length.

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

In addition, the homopolypropylene has a melt index (MI) of 10 to 40g / 10min, isotactic index of 95 or more, melting point (DSC) of 160 to 165 ℃ characterized in that the manufacturing method of the functional polyolefin-based short fibers to provide.

In addition, the polyolefin-based short fibers of the functional polyolefin-based short fibers, characterized in that composed of 99.0 to 99.5% by weight of homopolypropylene, 0.3 to 0.5% by weight of the emulsion for imparting hydrophilicity or hydrophobicity and 0.1 to 0.5% by weight of functional additives It provides a manufacturing method.

In addition, the ratio of each of the herbal extract and green tea extract is 20:80 to 80:20, or the ratio of each of the herbal extract and alum is 20:80 to 80:20, the production method of functional polyolefin-based short fibers to provide.

In addition, the present invention is a polyolefin-based short fibers, the coating layer consisting of a liquid resin is further formed on the surface of the short fibers, the liquid resin is a functional spinning emulsion and herbal extracts and green tea extracts, or a mixture of herbal extracts and alum A functional polyolefin based short fiber is provided.

In addition, the liquid resin provides a functional polyolefin-based short fibers, characterized in that the content of 0.4 to 1.0% by weight of the polyolefin-based short fibers are applied.

In addition, the polyolefin short fibers are made of homopolypropylene having a melt index (MI) of 15 to 45 g / 10 min, an isotactic index of 95% by weight or more, and a melting point (DSC) of 160 to 165 ° C. Provided is a functional polyolefin based short fiber.

Furthermore, the functional polyolefin type short fiber provided by the method of the above is provided.

Further, a functional polyolefin-based nonwoven fabric is produced by a thermal bonding method or a needle punching method using the functional polyolefin-based short fibers produced by the above-described method or the short fibers.

Hereinafter, preferred 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 the manufacturing and material tolerances inherent in the meanings mentioned, 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 functional polyolefin-based short fibers for nonwoven fabrics containing herbal extracts and green tea extracts or herbal extracts and alum in the polyolefin-based short fibers and have a prophylactic and alleviating function such as allergy and inflammation.

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 Pass the crimping step to give crimp to Functional spinning oil and herbal extract and green tea extract or crimped filaments are sprayed onto the fibers by spraying liquid resin containing herbal extracts and alum to fix and heat-fix the cut to a predetermined length to form short fibers. It is formed in a short fiber forming step.

The herbal extract has a bactericidal, disinfecting and aroma effect, the green tea extract has a natural antibacterial effect and the alum has an antimicrobial effect as an inorganic substance.

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 40 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 short fibers using the homopolypropylene, the yarn is spun at a spinning speed of about 50 to 100 m / min at a spinning temperature of 230 to 290 ° C., and a crimp is given after stretching appropriately between a draw ratio of 0.5 to 3.0. The hydrophilic anti-emulsion agent and herb extract and green tea extract, or a liquid resin containing the herb extract and alum, are sprayed to attach the spinning oil to the fiber surface. About 100-120 ℃ After heat setting at about 8 to 12 minutes at a temperature, the length of the fiber may be cut to about 35 to 60 mm to prepare polyolefin short fibers having a final fiber fineness of 2.0 to 4.0 denier and an average elongation of 300 to 380%.

The liquid resin may be prepared by mixing 4 to 10% by weight of the hydrophilic spinning oil, herbal extracts and green tea extracts or herbal extracts and alum 1 to 5% by weight, water 85 to 95% by weight.

The herb extract is extracted from the herb, the herb is a generic term for a fragrant plant, the herb includes rosemary, lavender, lemon rice, peppermint, etc., the herbal extract used in the present invention is one or two or more of the types of herbs It is an active ingredient extract of herbs obtained by mixing and extracting herbs.

The green tea extract is extracted from green tea, green tea is a tea that dries the leaves of the tea tree (Camellia sinensis) by drinking in hot water, has been used as a favorite food and medicinal in Japan, China, etc. since ancient times. In particular, the catechin component of green tea, a kind of polyphenol, is known to be excellent in antioxidant activity. It prevents and suppresses skin aging due to ultraviolet rays and harmful environmental factors, enhances the vitality and immunity of skin mucous membranes and skin cells, Antibacterial effect on various microorganisms is expressed. Green tea extract is an active ingredient extract of green tea obtained by extracting and purifying natural tea leaves.

The alum is AlK (SO ₄ ) ₂ · 12H ₂ O, potassium aluminum sulfate, which is widely used as a food processing agent and has functions such as antibacterial and anti-inflammatory.

The herbal extract and green tea extract are prepared in a liquid form and alum is dried to form a powder of very small particles and mixed with a hydrophilic anti-emulsifying agent.

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.

The liquid resin will preferably be applied to the short fibers of 0.4 to 1.0% by weight of the polyolefin-based short fibers.

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 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 short fibers are manufactured by the method according to a preferred embodiment of the present invention, a thermal bonding method or a needle punching method 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 20 to 40 mpm, the heat-adhesion between the fibers is produced while passing through the hot roll (Hot Roll) is set to about 130 ~ 140 ℃ Can be.

In this case, the basis weight of the nonwoven fabric is preferably 15 to 30 gsm.

On the other hand, if foreign matters are attached to the surface of the fiber, bubbles are generated when it is fixed, which causes deterioration of the properties of the nonwoven fabric. At this time, an appropriate content is important because herbal extracts and green tea extracts, or herbal extracts and alum can also act as foreign substances.

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.

Polyolefin-based short fibers containing herbal extracts and green tea extracts or herb extracts and alum and a method for preparing the same, and a thermal bond nonwoven fabric using the same, are non-toxic and exhibit prevention and alleviation effects such as allergy and inflammation.

In addition, the short fiber according to the present invention is a non-woven fabric by thermal bonding to minimize the lowering of physical properties of the non-woven fabric due to the addition of herbal extracts and green tea extracts, or herbal extracts and alum, there is no degradation of physical properties of the final product and conventional polyolefin-based It has allergy and inflammation alleviation and prevention effect that short fiber does not have.

Therefore, the short fibers and the nonwoven fabric according to the present invention have no skin irritation and can be applied to household goods and hygiene products such as children's products or people with sensitive skin without toxicity.

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

Hereinafter, examples of preparing the functional polyolefin-based short fibers and nonwoven fabric containing the herbal extract and green tea extract or the herbal extract and alum are not limited thereto.

1. Preparation of Polyolefin Short Fibers

Example  One

A non-drawn yarn was prepared with a homopolypropylene resin having a MI of 25 g / 10 min and an I.I of at least 95 wt% at a spinning temperature of 260 ° C. and a spinning speed of 80 m / min.

The unstretched yarn is drawn at a draw ratio of 1.5 to impart crimp in the crimper, and spray the liquid resin containing a hydrophilic anti-emulsion agent, a herb extract and a green tea extract in a 50:50 ratio, so that the herbal extract and the green tea extract are all short fibers. It adhered to the fiber surface so that 0.3 weight% may be included with respect to the weight.

After fixing the liquid resin, heat-fixed at 100 ° C. for about 10 minutes, the fiber was cut to have a length of 40 mm to prepare a short polyolefin fiber having a final fiber fineness of 2.2 denier and an average elongation of 350%.

Example  2

Work was carried out in the same manner as in Example 1, but was sprayed to the fiber surface by spraying a liquid resin containing a 70:30 ratio of the herbal extract and green tea extract.

Example  3

Work was carried out in the same manner as in Example 1, but was sprayed on the fiber surface by spraying a liquid resin containing a 50:50 ratio of the herb extract and alum.

Example  4

Work was carried out in the same manner as in Example 1, but was sprayed on the fiber surface by spraying a liquid resin containing a herb extract and alum in a ratio of 70:30.

Comparative example

The operation was carried out in the same manner as in Example 1, except that only the hydrophilic spinning oil was sprayed on the homopolypropylene resin except the herbal extract and green tea extract or herbal extract and alum.

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 30 mpm to prepare a calender-bonded nonwoven fabric having a basis weight of 20 gsm by passing between 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) the best temperature excellent in the tensile strength of the nonwoven fabric was measured and measured the physical properties.

◎ Tensile strength property test

* Analysis method

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. Single fiber fineness: Measure fineness based on ASTM D1577

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

6. Tensile strength and elongation of nonwoven fabric: Cut-strip method of JIS L 1096 (sample width 5cm, length 14cm)

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

◎ Confirmation of nonwoven fabric property change made of polyolefin fiber containing herbal extract and green tea extract or herbal extract and alum

division
weight Strength (kg / 5cm) Shinto (%) g / ㎡ MD CD MD CD Example 1 20.0 5.06 1.12 60 100 Example 2 20.0 5.18 1.07 60 100 Comparative example 20.0 5.21 1.06 60 100

division
weight Strength (kg / 5cm) Shinto (%) g / ㎡ MD CD MD CD Example 3 20.0 5.14 1.08 60 100 Example 4 20.0 5.22 1.11 60 100 Comparative example 20.0 5.21 1.06 60 100

Table 1 and Table 2 is a non-woven fabric made of polyolefin-based short fibers containing herbal extracts and green tea extracts or herbal extracts and alum according to the present invention to evaluate the physical properties of the non-woven fabrics prepared from Examples and Comparative Examples Even if the herbal extract and green tea extract or the herbal extract and alum are added, it can be seen that there is little change in strength and elongation of the nonwoven fabric.

◎ Antibacterial evaluation experiment

No functionality Herbs + Green Tea Herb + Alum 50:50 70:30 50:50 70:30
Strain 1
Initial number of bacteria 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 24 hours later 5.8 x 10 ⁶ <10 <10 <10 <10 increase x46 △ 99% ▽ 99% ▽ 99% ▽ 99% ▽
Strain 2
Initial number of bacteria 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 24 hours later 6.4 x 10 ⁶ <10 <10 <10 <10 increase x47 △ 99% ▽ 99% ▽ 99% ▽ 99% ▽
Strain 3
Initial number of bacteria 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 1.5 x 10 ⁵ 24 hours later 6.4 x 10 ⁶ <10 <10 <10 <10 increase x45 △ 99% ▽ 99% ▽ 99% ▽ 99% ▽

※ Experiment Method and Evaluation

The antimicrobial activity was evaluated according to the following experimental method using a fiber and a nonwoven fabric prepared according to Comparative Examples and Examples of the present invention.

* Experimental Standard: KS K 0693

* Inoculation bacterial concentration: Strain 1-1.5 x 10 ⁵ / ml

Strain 2-1.5 x 10 ⁵ / ml

Strain 3-1.5 x 10 ⁵ / ml

* Nonionic surfactant type: 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 60㎠

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

Test strain used: Strain 1 Staphylococcus aureus ATCC 6538 (Staphylococcus aureus)

              Strain 2 Klebsiella pneumoniae ATCC 4352

Strain 3 Salmonella enteritidis

Inoculate and incubate the non-woven fabrics prepared in Comparative Examples and Examples, and after a predetermined time, washes in a certain amount of liquid, extracts the cultured bacteria, and measures the bacterial growth rate by measuring the number of bacteria.

As shown in Table 3, the nonwoven fabric prepared from the herbal extract and the green tea extract according to the present invention, or the polyolefin-based short fibers containing the herbal extract and alum, is better than the herbal extract and green tea extract or the nonwoven fabric containing no herbal extract and alum. It can be seen that the antimicrobial activity 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.

Claims (10)

In the method for producing a polyolefin short fiber,
Melting a polyolefin-based resin;
Spinning the melt at a rate of 50 to 100 m / min at a spinning temperature of 230 to 290 ° C .;
Stretching the spun yarn at a draw ratio of 0.5 to 3.0;
Crimping to impart crimp to the stretched filaments;
A surface treatment step of spraying a liquid resin containing a functional radioemulsion agent and an herbal extract and green tea extract or a herbal extract and a functional additive which is an alum to the crimped filament; And
Method for producing a functional polyolefin-based short fibers, characterized in that it comprises a step of forming a short fiber to heat the surface-treated filament after a predetermined set length. The method of claim 1,
The polyolefin resin is a homo polypropylene (homo polypropylene) characterized in that the manufacturing method of the functional polyolefin-based short fibers. The method of claim 2,
The homopolypropylene has a melt index (MI) of 10 to 40g / 10min, an isotactic index of 95 or more and a melting point (DSC) of 160 to 165 ℃ characterized in that the manufacturing method of the functional polyolefin-based short fibers. The method of claim 1,
The polyolefin short fibers are 99.0 to 99.5% by weight of homopolypropylene, 0.3 to 0.5% by weight of the emulsion for imparting hydrophilicity or hydrophobicity, and 0.1 to 0.5% by weight of a functional additive. . The method of claim 1,
The ratio of each of the herb extract and green tea extract is 20:80 to 80:20 or the ratio of the herb extract and alum is 20:80 to 80:20, characterized in that the manufacturing method of the functional polyolefin-based short fibers. In the polyolefin short fiber,
The coating layer made of liquid resin is further formed on the surface of the short fiber,
The functional resin is a functional polyolefin-based short fibers, characterized in that the mixture of a functional spinning emulsion, herbal extracts and green tea extracts, or herbal extracts and alum. The method according to claim 6,
The liquid resin is a functional polyolefin-based short fibers, characterized in that the content of 0.4 to 1.0% by weight of the polyolefin-based short fibers. The method according to claim 6,
The polyolefin-based short fibers are functional polyolefins made of homopolypropylene having a melt index (MI) of 15 to 45 g / 10 min, an isotactic index of 95% by weight or more, and a melting point (DSC) of 160 to 165 ° C. Staple fiber. The functional polyolefin type short fiber manufactured by the method of any one of Claims 1-5. A functional polyolefin-based short fiber produced by the method of any one of claims 1 to 5 or a short fiber of any one of claims 6 to 8, produced by the thermal bonding method or needle punching method Functional polyolefin-based nonwoven fabrics, characterized in that.

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