KR101062997B1 - Polypropylene short fibers with high heat resistance and light resistance, manufacturing method thereof, nonwoven fabric made therefrom - Google Patents

Abstract

The present invention provides a method for producing a short polypropylene fiber, comprising: melting and spinning a blend of 95 to 99.9% by weight of a homopolypropylene containing an antioxidant and 0.1 to 5% by weight of a polyolefin carrier resin containing an ultraviolet stabilizer; Stretching and crimping the stretched unstretched yarn to give a crimp; A surface treatment step of attaching the liquid resin containing the emulsion emulsion to the surface of the crimped stretched yarn; And it provides a high heat resistance and light resistance polypropylene short fibers and a manufacturing method thereof, and a nonwoven fabric made therefrom, comprising the step of heat-setting the drawn yarn and cutting into short fibers.

Polypropylene Short Fiber, Nonwovens, UV Stabilizer, Antioxidant

Description

High thermostable and lightfast polypropylene staple fibers and methods of the same, nonwoven made of them}

TECHNICAL FIELD The present invention relates to short polypropylene fibers, and more particularly, to a polypropylene short fiber having high heat resistance and light resistance, a manufacturing method thereof, and a nonwoven fabric made therefrom.

Polypropylene fibers are generally hydrophobic and have a low melting point. However, polypropylene fibers have been used for light sportswear, etc., by using wicking properties, which are advantageous for moisture transfer.

In general, when manufacturing short fibers from polypropylene polymer, a polymer is mixed with a predetermined amount of additives and melt-extruded in a conventional commercial process to produce a fiber, and then a crimp and cut to a predetermined length is applied to the melt-extruded fiber. It goes through the process of.

Non-woven fabrics are fabrics made by bonding or tangling textile aggregates by mechanical or chemical treatment such as mechanical manipulation or heat bonding, without weaving, weaving, or knitting. , Emboss films, wet nonwovens, and the like.

Due to its unique low melting point and chemical resistance, polypropylene short fibers are mainly manufactured by various methods. The general process of manufacturing the nonwoven fabric is, for example, by shorting the short fibers through a carding machine. It is made of a web and thermally bonded to it. In order to thermally bond the web, a pair of calendar rollers, a method of using ultrasonic waves, a method of using hot air, and the like are mainly used.

Particularly, in the case of polypropylene short fibers, the fibers are arranged and entangled through an opening and carding process to form a web, which is thermally bonded by a diamond or delta-shaped calender roller and industrially. Non-woven fabric is made of non-woven fabric that can be used for various purposes, or by heating air in a porous drum refluxing the web after carding process by using hot air without using a calender roller. Is prepared.

Polypropylene nonwovens are used in disposable diapers, incontinence diapers, masks, sanitary nonwovens, medical nonwovens, and the like. Non-woven fabrics for this purpose do not require as much strength as woven fabrics, but they require secondary processing and strength to be usable, have good physical properties, and should be soft and suitable for the safety of the skin if they are in direct contact with the skin. do.

When the polypropylene short fibers are manufactured and used in general, polypropylene short fibers have a problem in that their physical properties are poor due to changes in strength and elongation when they are subjected to heat or light from the outside.

In Japanese Unexamined Patent Publication No. 2002-235237, polypropylene heat sealable nonwoven fabric is made of metal salt of salicylic acid as a masterbatch pellet as a crystallization inhibitor to give 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. Spunbond nonwoven fabrics have a higher tensile strength than short fiber thermal bond nonwoven fabrics, but are softer in touch. 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 becomes low and may cause a decrease in strength of the nonwoven fabric. In addition, there is a disadvantage that the heat resistance and light resistance is not excellent.

Accordingly, it has been desired to produce polypropylene short fibers and nonwoven fabrics having high heat resistance and light resistance without severely changing physical properties even when the fiber is subjected to heat or light for a long time.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide polypropylene short fibers and nonwoven fabric having good heat resistance and light resistance.

Another object of the present invention is to provide a polypropylene short fiber and nonwoven fabric that can prevent heat discoloration resistance and gas-fading phenomenon as compared to the general polypropylene short fiber and nonwoven fabric.

In order to achieve the above object, the present invention provides a method for producing short polypropylene fibers, by blending and melting 95 to 99.9% by weight of a homopolypropylene containing an antioxidant and 0.1 to 5% by weight of a polyolefin carrier resin containing an ultraviolet stabilizer. Spinning; Stretching and crimping the stretched unstretched yarn to give a crimp; A surface treatment step of attaching the liquid resin containing the emulsion emulsion to the surface of the crimped stretched yarn; And it provides a method for producing a polypropylene short fiber having a high heat resistance and light resistance comprising the step of heat-setting the drawn yarn and then cut into short fibers.

In addition, the present invention has a high heat resistance and light resistance, characterized in that the melt index of the homopolypropylene is 3 to 30g / 10min, the isotactic index is 90% or more, the melting point is 160 to 170 ℃ measured by DSC It provides a method for producing polypropylene short fibers.

In addition, the present invention is the antioxidant is tris (2,4-di-butylphenyl) phosphite and 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) -1, A mixture of 3,5-triazine-2,4,6 (1H, 3H, 5H) -trione, the content of which is 0.05 to 0.2% by weight of antioxidant and 99.8 to 99.95% by weight of homopolypropylene. Provided is a polypropylene short fiber manufacturing method having high heat resistance and light resistance.

In addition, the present invention is a melt index of the polyolefin carrier resin is 5 to 50g / 10min, the UV stabilizer is a non-phenol-based UV stabilizer, characterized in that high heat resistance and light resistance, characterized in that 0.1 to 0.4 parts by weight based on 100 parts by weight of the total It provides a polypropylene short fiber manufacturing method having a.

In addition, the present invention is 1,6-hexanamine, N, N'bis (2,2,6,6- with 2,4,6-trichloro-1,3,5-triazine as the non-phenol UV stabilizer Tetramethyl-4-piperidinyl) -polymer provides a method for producing polypropylene short fibers having high heat resistance and light resistance.

In addition, the present invention is a polypropylene short fiber, having high heat resistance and light resistance, characterized in that it comprises 95 to 99.9% by weight of homopolypropylene containing antioxidant and 0.1 to 5% by weight of polyolefin carrier resin containing UV stabilizer Provides short polypropylene fibers.

 In addition, the present invention has a high heat resistance and light resistance, characterized in that the melt index of the homopolypropylene is 3 to 30g / 10min, the isotactic index is 90% or more, the melting point is 160 to 170 ℃ measured by DSC Provides short polypropylene fibers.

In addition, the present invention is the antioxidant is tris (2,4-di-butylphenyl) phosphite and 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) -1, A mixture of 3,5-triazine-2,4,6 (1H, 3H, 5H) -trione, the content of which is 0.05 to 0.2% by weight of antioxidant and 99.8 to 99.95% by weight of homopolypropylene. It provides a polypropylene short fiber having high heat resistance and light resistance.

In addition, the present invention is a melt index of the polyolefin carrier resin is 5 to 50g / 10min, the UV stabilizer is a non-phenol-based UV stabilizer, characterized in that high heat resistance and light resistance, characterized in that 0.1 to 0.4 parts by weight based on 100 parts by weight of the total To provide a short polypropylene fiber.

In addition, the present invention is 1,6-hexanamine, N, N'bis (2,2,6,6- with 2,4,6-trichloro-1,3,5-triazine as the non-phenol UV stabilizer It provides a polypropylene short fiber having high heat resistance and light resistance, characterized in that the tetramethyl-4-piperidinyl) -polymer.

The present invention also provides a polypropylene nonwoven fabric prepared from the above polypropylene short fibers having high heat resistance and light resistance.

As described above, the short polypropylene fiber according to the present invention and the manufacturing method thereof, and the nonwoven fabric made therefrom have an effect of having heat resistance including high light resistance and heat discoloration resistance.

In addition, the present invention, unlike non-woven fabric composed of general polypropylene short fibers widely used as sanitary materials, filter materials, carpet materials, automotive interior materials, polypropylene short fibers added a non-phenolic UV stabilizer excellent in light resistance and heat resistance to hPP By manufacturing the excellent light resistance, heat resistance and has the effect of preventing the gas-fading (Gas-Fading) phenomenon.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, 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.

The terms " about ", " substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation to or in the numerical value of the manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

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.

1 is a manufacturing process diagram of polypropylene short fibers according to an embodiment of the present invention.

The short fiber according to the embodiment of the present invention is a high thermal conductivity polypropylene short fiber, which is melted by blending 95 to 99.9% by weight of a homopolypropylene containing an antioxidant and 0.1 to 5% by weight of a polyolefin carrier resin containing an ultraviolet stabilizer. Spinning step, stretching the spun unstretched yarn, stretching and crimping step of imparting crimp, surface treatment step of attaching liquid resin containing emulsion emulsion to the surface of the crimped stretched yarn, and the stretched yarn After heat-setting to cut the short fibers to produce a short polypropylene fiber.

In the melting and spinning step, the mixed melt is blended with 95 to 99.9% by weight of a homopolypropylene containing an antioxidant and 0.1 to 5% by weight of a polyolefin carrier resin containing an ultraviolet stabilizer. The antioxidant may be used as a non-limiting example of the general antioxidant, but tris (2,4-diter-butylphenyl) phosphite and 1,3,5-tris (3,5-di-tert-butyl-4 It is more preferred to use a mixture of -hydroxybenzyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -trione.

The content of the antioxidant is mixed at 0.05 to 0.2% by weight antioxidant and 99.8 to 99.95% by weight homopolypropylene. When the antioxidant is added, it has a discoloration resistance in addition to the general antioxidant function.

The polyolefin carrier resin has a melt index of 5 to 50 g / 10 min, and the content of the UV stabilizer is mixed and melted polyolefin carrier resin mixed with an UV stabilizer so as to contain 0.1 to 0.4 parts by weight based on 100 parts by weight of the total. The UV stabilizer is preferably to use a non-phenolic material, which has the effect of preventing the gas-fading phenomenon while the polypropylene short fibers have light resistance and heat resistance. The gas-fading phenomenon is that when the phenolic compound is contained in polypropylene in the form of UV stabilizer, the phenolic compound reacts with NOx gas in air to cause discoloration. UV stabilizers used non-phenolic materials. The non-phenolic substance of the UV stabilizer is 1,6-hexanamine with 2,4,6-trichloro-1,3,5-triazine, N, N'bis (2,2,6,6-tetra Methyl-4-piperidinyl) -polymer is more preferred and the formula is:

Polyolefins are a group of polymers made from olefin monomers, examples of which include polypropylene, polyethylene, polyisoprene, and the like. The polyolefin carrier resin containing the ultraviolet stabilizer is melted together with the homopolypropylene.

The homopolypropylene used in the present invention preferably has a melt index (MI) of 3 to 30 g / 10 min, an isotactic index of 90% or more, and a melting point of 160 to 170 ° C. measured by DSC. The lower the melt index of the homopolypropylene can impart fiber stiffness, chemical resistance, and lower elongation, but the viscosity decreases, resulting in poor workability. If the melt index is too high, the stiffness of the fiber is lowered, and spinning Since it is difficult, it is suitable to have a melt index of 3 to 30. If the isotactic index is less than 90%, the radioactivity is not good, there is a problem that the stiffness of the polypropylene short fibers is lowered and the uniformity is inferior. Here, the isotactic means that the normal heptane is boiled to dissolve the atactic component, and the weight of the remaining isotactic component is represented by weight percent.

The blended material is spinning, the spinning temperature is preferably 240 to 280 ℃ during spinning and spinning at a spinning speed of 50 to 100m / min through the spinneret to produce undrawn yarn.

The spun unstretched yarn is subjected to the stretching and crimping process, the draw ratio is properly adjusted between 1.3 to 4.0, the stretching roll temperature is stretched to 50 to 100 ℃. The stretched yarn is imparted crimp in the crimper.

The crimped stretched yarn that is crimped is then subjected to a step of attaching an emulsion, which may be hydrophilic or hydrophobic, depending on the purpose of the final product. Dipping (Deeping) or spray (Spray) treatment of the stretched yarn crimped to the liquid resin containing the oil to allow the oil to adhere to the stretched yarn.

The stretched yarn with the emulsion is heat-set for about 8 to 12 minutes at a temperature of 100 to 120 ° C., and then cut to have a fiber length of 40 to 100 mm to target a final fiber fineness of 1.5 to 10 denier and an average elongation of 50 to 400%. The polypropylene short fiber can be manufactured.

Short polypropylene fiber according to the present invention is processed into a variety of non-woven fabrics mainly through calendering method, needle punching method, etc., due to its unique low melting point and chemical resistance, surface materials for diapers, sanitary napkins, etc. Mainly used for filters such as interior materials, air filters, water treatment filters, etc.

Another embodiment of the present invention provides a non-woven fabric produced by the above-mentioned short fiber thermal bond method (thermal bonding). The thermal bond processing for producing the nonwoven fabric can be made using a calender bonding method.

The calender bonding method is manufactured by carding short fibers and then heat-sealing the fibers while the web laminated on the conveyor passes between two hot rolls set at 140 to 165 ° C.

In the present invention, the thermal bond nonwoven fabric was manufactured through a pilot calender bonding facility, and the hot roll temperature of hot roll was the most favorable for the non-woven fabric production rate, the surface pattern shape of the roll, the difference between the roll setting temperature and the actual surface temperature, and the like. This is a relative result, not an absolute result, as it may vary depending on the production and equipment conditions of calender bonding method and the fineness of short fibers used as raw materials. For example, a card-bonded nonwoven fabric having a nonwoven basis weight of 20 to 100 gsm is formed by carding polypropylene short fibers at a speed of 80 to 150 mpm with a carding machine, manufacturing a nonwoven web, and then passing the web between two hot rolls. It can manufacture. At this time, while the temperature of the hot roll (135) to 165 ℃, the tensile strength of the nonwoven fabric to find the optimum temperature of the best excellent thermal fusion temperature to measure the physical properties.

Hereinafter, embodiments of the present invention will be described in detail. Conditions and test results of each Example and Comparative Examples can be summarized in the following [Table 1].

Example 1

(Production of Polypropylene Short Fiber)

When the homopolypropylene resin containing antioxidant is melted at a spinning temperature of around 250 ° C, 0.3 wt% of the polypropylene carrier resin containing the UV stabilizer is blended and spun at a spinning speed of about 100 m / min through a spinneret. Was prepared. The UV stabilizer was to contain 0.1 parts by weight based on 100 parts by weight of the total melt. The content of the antioxidant was mixed so that 0.05 to 0.2 wt% of the antioxidant and 99.8 to 99.95 wt% of the homopolypropylene were mixed to 0.2 wt% and 99.8 wt% of the homopolypropylene.

The undrawn yarn is drawn at a draw ratio of 2.0 and drawn at a draw roll temperature of 50 to 100 ° C., followed by crimping in a crimper, and a liquid resin containing a hydrophilic emulsion is subjected to dipping or spraying to make the total content of the emulsion short fiber. The emulsion is attached to the fiber surface to contain 0.5 parts by weight based on 100 parts by weight, heat-set for 10 minutes at a temperature of about 100 ° C., and the fibers are cut to 40 mm in length so that the final fiber fineness is 2.0-10 denier, average elongation. To produce a polypropylene short fiber aimed at 50 to 400%.

(Production of Polypropylene Thermal Bond Nonwoven Fabric)

The polypropylene thermally bonded nonwoven fabric is produced by carding polypropylene short fibers obtained by the above method at a speed of 80 to 150 mpm with a carding machine, preparing a nonwoven web, and then passing the web between two hot rolls to obtain a nonwoven basis weight. A calender bonded nonwoven fabric of 20-100 gsm was prepared. At this time, the temperature of the two hot rolls (140) and 138 ° C, respectively, was found to find the thermal fusion temperature, and the physical properties such as tensile strength of the nonwoven fabric were measured.

Example 2

The same procedure as in Example 1 was carried out except that the UV stabilizer contained 0.2 parts by weight based on 100 parts by weight of the total melt.

Example 3

The same procedure as in Example 1 was carried out except that the UV stabilizer contained 0.3 parts by weight based on 100 parts by weight of the total melt.

Comparative Example 1

The same procedure as in Example 1 was carried out except that the polyolefin carrier resin containing the UV stabilizer was used as a homopolypropylene alone to prepare short fibers and a nonwoven fabric.

※ Analysis method

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

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

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

2. Isotactic Index (II): ISO 9113: 1986 Plastics-Polypropylene (PP) and propylene-copolymer thermoplastics-Determination of isotactic index: Isotactic remaining after boiling the normal heptane to dissolve the atactic component The components are weighed and expressed in weight percent and this weight percent is called isotactic index.

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 generated immediately under the detention of 11,000 to 65,000 holes.

         However, trimming or dropping is less than once / hour: ◎

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

         Only three times / time of drop or drop: △

         No radiation: ×

5. Elongation: Emissive during drawing process

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

6. Crimping workability: The number of times the stretched tow failed by passing through the crimper by visual observation.

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

7. Short fiber strength / elongation measurement: Strength / elongation measurement based on DIN 53816

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

10. Leveling agent: 1 (bad) ~ 5 (very good)

11. Heat resistance test: After leaving the oven at 130 ℃, measure the strength / elongation at regular intervals.

12. Light resistance test: measuring instrument Atlas, Fade-o-meter, generated light source Xenon arc,

                  Measurement Condition Temperature 63 ± 3 ℃

13. Heat discoloration test: Heat discoloration test at 130 ℃ oven

14. Gas-padding test: Measurement condition-Check for discoloration at regular intervals by injecting propane gas under the temperature condition of 60 ~ 80 ℃

Test 1: Test of workability and physical properties of short fibers and nonwovens

In Examples and Comparative Examples, the workability / physical properties of the short polypropylene fibers and the nonwoven fabric were tested. The results are shown in Table 1 below.

division Workability and Physical Properties of Fiber Workability and Properties of Nonwovens Radioactive Elongation Crimping
Workability burglar
(g / De) Shindo
(%) Carding Leveling system Example 1 ◎ ○ ○ 2.97 88 Good 4 Example 2 ○ ○ ○ 3.01 98 Good 5 Example 3 ◎ ○ ○ 3.03 104 Good 4 Comparative Example 1 ○ ○ ○ 2.82 103 Good 4

※ Test result

It can be seen that the polypropylene short fibers and nonwoven fabrics prepared through Examples 1 to 3 have no significant difference in workability and physical properties as compared to the polypropylene short fibers and nonwoven fabrics prepared by homopolypropylene alone.

Test 2: heat resistance experiment

After shortening the polypropylene short fibers prepared through the Examples and Comparative Examples in an oven 130 ℃ and measured the strength / elongation at a certain time intervals, the results are shown in Table 2 below.

division Oven standing time (Hr) Strength (g / De) Shinto (%)

Example 1
0 2.97 104 4 2.96 94 8 2.92 89 10 2.89 88 20 2.48 57 40 1.59 21

Example 2
0 3.01 89 4 2.94 84 8 2.89 80 10 2.83 79 20 2.55 44 40 1.98 32

Example 3 0 3.03 86 4 3.01 85 8 2.95 82 10 2.91 74 20 2.78 69 40 2.22 42

Comparative Example 1 0 2.82 103 4 1.31 18 8 0.84 10 10 Not measurable Not measurable 20 Not measurable Not measurable 40 Not measurable Not measurable

※ Test result

As a result of the heat resistance test, it can be seen that the short fibers of Examples 1 to 3 are significantly smaller in strength and elongation reduction than in Comparative Example 1. In addition, Examples 1 to 3 show that the decrease in strength and elongation is the smallest in Example 3, and the decrease in Example 1 is the largest. Through this, when the UV stabilizer is contained, the heat resistance is improved, and as the amount of the UV stabilizer increases, the strength and elongation reduction rate is small.

Test 3: light resistance test

The polypropylene short fibers prepared in Examples and Comparative Examples were measured for strength / elongation at regular intervals by exposing the light source Xenon Arc to a closed space maintained at 63 ° C. using a measuring device Fade-o-meter. The results are shown in [Table 3] below.

division Exposure time (Hr) Strength (g / De) Shinto (%)
Example 1 0 2.97 104 40 2.74 87 80 2.68 76 160 2.44 53
Example 2

0 3.01 88 40 2.94 85 80 2.85 81 160 2.58 71
Example 3

0 3.03 86 40 2.98 85 80 2.96 84 160 2.82 74
Comparative Example 1

0 2.82 103 40 1.57 23 80 Not measurable Not measurable 160 Not measurable Not measurable

※ Test result

As a result of the test, it can be seen that the short fibers of Examples 1 to 3 are significantly smaller in strength and elongation reduction than in Comparative Example 1. In addition, Examples 1 to 3 show that the decrease in strength and elongation is the smallest in Example 3, and the decrease in Example 1 is the largest. Through this, when the UV stabilizer is contained, the light resistance is improved, and as the amount of the UV stabilizer increases, the strength and elongation decrease rate is small.

Test 4: thermochromic and gas-padding test

It was confirmed whether the color change for 40 hours at regular time intervals with respect to the heat discoloration resistance Examples 1 to 3 showed a good color resistance, although there is a very slight color change after 40 hours. On the contrary, in Comparative Example 1, after 6 hours, a slight discoloration occurred, and the color change appeared in 10 hours.

As a result of discoloration for 40 hours at a predetermined time interval by propane gas injection in relation to gas-padding, all of Examples 1 to 3 were not discolored. However, in Comparative Example 1, discoloration was observed after 4 hours.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a manufacturing process diagram of polypropylene short fibers having high heat resistance and light resistance according to an embodiment of the present invention.

Claims (11)

In the method for producing polypropylene short fibers, Melting and spinning 95 to 99.9% by weight of homopolypropylene containing antioxidant and 0.1 to 5% by weight of polyolefin carrier resin containing UV stabilizer; Stretching and crimping the stretched unstretched yarn to give a crimp; A surface treatment step of attaching the liquid resin containing the emulsion emulsion to the surface of the crimped stretched yarn; And Method for producing a polypropylene short fiber having a high heat resistance and light resistance comprising the step of heat-setting the drawn yarn and then cut into short fibers. The method of claim 1,  The polypropylene short fiber having high heat resistance and light resistance, wherein the homopolypropylene has a melt index of 3 to 30 g / 10 min, an isotactic index of 90% or more, and a melting point measured by DSC of 160 to 170 ° C. Manufacturing method. The method of claim 1, The antioxidants include tris (2,4-diter-butylphenyl) phosphite and 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) -1,3,5- High heat resistance, characterized by mixing triazine-2,4,6 (1H, 3H, 5H) -trione, the content of which is 0.05 to 0.2% by weight of antioxidant and 99.8 to 99.95% by weight of homopolypropylene And polypropylene short fibers having light resistance. The method of claim 1, The polyolefin carrier resin has a melt index of 5 to 50 g / 10 min, and the UV stabilizer is a non-phenol-based UV stabilizer, containing 0.1 to 0.4 parts by weight based on 100 parts by weight of the polypropylene having high heat resistance and light resistance. Short fiber manufacturing method. 5. The method of claim 4, The non-phenolic UV stabilizer is 1,6-hexanamine with 2,4,6-trichloro-1,3,5-triazine, N, N'bis (2,2,6,6-tetramethyl- 4-piperidinyl) -polymer is a high temperature and light resistance polypropylene short fiber manufacturing method characterized in that. In polypropylene short fibers, 95 to 99.9% by weight of homopolypropylene containing an antioxidant and 0.1 to 5% by weight of a polyolefin carrier resin containing an ultraviolet stabilizer. The method of claim 6,  The polypropylene short fiber having high heat resistance and light resistance, characterized in that the melt index of the homopolypropylene is 3 to 30 g / 10 min, the isotactic index is 90% or more, and the melting point measured by DSC is 160 to 170 ° C. . The method of claim 6, The antioxidants include tris (2,4-diter-butylphenyl) phosphite and 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) -1,3,5- High heat resistance, characterized by mixing triazine-2,4,6 (1H, 3H, 5H) -trione, the content of which is 0.05 to 0.2% by weight of antioxidant and 99.8 to 99.95% by weight of homopolypropylene And polypropylene short fibers with light resistance. The method of claim 6, The polyolefin carrier resin has a melt index of 5 to 50 g / 10 min, and the UV stabilizer is a non-phenol-based UV stabilizer, containing 0.1 to 0.4 parts by weight based on 100 parts by weight of the polypropylene having high heat resistance and light resistance. Short fibers. 10. The method of claim 9, The non-phenolic UV stabilizer is 1,6-hexanamine with 2,4,6-trichloro-1,3,5-triazine, N, N'bis (2,2,6,6-tetramethyl- Polypropylene short fibers with high heat resistance and light resistance, characterized by 4-piperidinyl) -polymer. A polypropylene nonwoven fabric made from polypropylene short fibers having a high heat resistance and light resistance according to any one of claims 1 to 10.

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