JPH03130452A - Stretchable non-woven fabric and its production - Google Patents

Abstract

PURPOSE:To obtain a stretchable non-woven fabric having excellent hot water resistance and soft handle by spinning a polyurethane derived from a specific aliphatic copolycarbonate polyol by melt blow method to provide fiber web. CONSTITUTION:A polyurethane consisting of (A) an organic diisocyanate, (B) aliphatic copolycarbonate polyol having (i) formula I and (ii) formula II as recurring unit and being (9:1)-(1:9) in the ratio of the component (i) to the composition (ii) and (C) chain extender having two active hydrogens capable of reacting with isocyanate is formed into fiber web by spinning the polyurethane by melt blow method to provide the objective stretchable non-woven fabric.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a stretchable nonwoven fabric and a method for producing the same.

More specifically, it is mainly made from aliphatic copolycarbonate polyol-based polyurethane with rubber elasticity, and has particularly excellent hot water resistance, light resistance, and heat resistance, as well as good elongation recovery, chemical resistance, and (particularly dry cleaning resistance). The present invention relates to a stretchable nonwoven fabric with a soft texture and a method for producing the same.

Such stretchable nonwoven fabrics can be used as batting for clothing, poultice materials, Supporter 1 elastic tape, interlining, opening parts of clothing, bandages,
Useful for diapers, gloves, hats, surgical gowns, etc.

[Conventional technology]

Nonwoven fabrics made of various synthetic fibers are known.

Nonwoven fabrics obtained by spinning thermoplastic resins in these nonwoven fabrics by melt blowing are also known.

Regarding the spinning method using the melt blow method, please refer to the Industrial and Engineering Chemistry (Industrial and Engineering Chemistry)
Industrial and Engineering
g Chemistry) Volume 48, No. 8 (P, 13
42-1346), 1956, disclosed the basic apparatus and method.

Furthermore, the following nonwoven fabrics are known as stretchable nonwoven fabrics obtained by melt blowing polyurethane.

That is, JP-A-59-223347 discloses a melt-blown nonwoven fabric made of polyurethane elastic filaments.

JP-A-1-132858 discloses a melt-blown nonwoven fabric made of polyurethane using polyester diol.

[Problems to be Solved by the Invention] The melt-blown non-woven fabric disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 59-223347 is composed of filaments, so the fiber diameter is thick for a melt-blown non-woven fabric, and the fabric lacks a particularly soft touch. The lower right column of page 2 of the publication describes polyols as known polyurethanes, such as "dihydroxy polyether, dihydroxy polyester, dihydroxy polycarbonate, dihydroxy polyester adduct, etc.", but the aliphatic copolycarbonate polyol of the present invention However, the polyurethane melt-blown nonwoven fabric made of dihydroxypolycarbonate not only had a hard texture but was also difficult to make into a nonwoven fabric.

Furthermore, the melt-blown nonwoven fabric disclosed in JP-A-1-132858 uses polyester diol,
Although hydrolysis resistance has been improved, dry cleaning resistance and light resistance are poor.

The characteristics of polyurethane molding materials currently on the market are as follows:
Much depends on the high molecular weight polyol used as the polyurethane raw material.For example, ``recent polyurethane application technology''
According to page 139 (published by CMC), when polyester polyol is used, water resistance is poor, but mechanical strength and heat resistance are relatively good.

On the other hand, when polyether polyol is used, water resistance is improved, but heat resistance and mechanical strength are inferior. Poly-ε-caprolactone polyol has mechanical properties, heat resistance, cold resistance,
However, it has poor water resistance. Aliphatic copolycarbonate polyols have excellent water resistance, mechanical properties, and heat resistance, but are poor in cold resistance. Therefore, if the cold resistance of polyurethane using an aliphatic copolycarbonate polyol is improved, we can expect a polyurethane nonwoven fabric that is non-yellowing, has excellent cold resistance, and has well-balanced other physical properties compared to current commercially available products.

The present invention was achieved as a result of intensive studies in view of the problems of the conventional art.

The purpose of the present invention is to achieve excellent elongation recovery, especially excellent hot water resistance, light resistance, and heat resistance, without the lack of soft touch, dry cleaning resistance, and light resistance that are found in the conventional techniques described above. An object of the present invention is to provide a stretchable nonwoven fabric made of an aliphatic copolycarbonate polyol-based polyurethane having good properties, chemical resistance, and electrical insulation properties and a particularly soft feel.

Still another object of the present invention is to provide an excellent method for producing stretchable nonwoven fabrics, which comprises a melt blowing method of an aliphatic copolycarbonate polyol-based polyurethane composition.

[Means for Solving the Problems] The same applicant as the present invention has proposed an aliphatic copolycarbonate polyol-based polyurethane in Japanese Patent Application No. 62-236728. This polyurethane has excellent heat resistance and oil resistance, and is particularly excellent in non-yellowing and cold resistance, and is made of aliphatic diisocyanate and aliphatic copolymer.The present invention relates to a melt-blown nonwoven fabric made of polyurethane including the above-mentioned polyurethane. .

According to the present invention, the object is to provide a polyurethane comprising an organic diisocyanate, an aliphatic copolycarbonate polyol, and a chain extender having two active hydrogens capable of reacting with the isocyanate, wherein the aliphatic copolycarbonate polyol is used as a repeating unit ( A) A stretchable nonwoven fabric characterized by being mainly composed of polyurethane thermoplastic fibers having +0(C)12)6QC← and 1 and having a ratio of A to B of 9:1 to 1:9. achieved by

According to the present invention, another object of the present invention is to combine an organic diisocyanate with repeating units (A) →0(C
Hz) 60 (i← and (B) -to 0 (CHI)
A polyurethane consisting of an aliphatic copolycarbonate polymer having sac←1 and a ratio of A and B of 9:1 to 1:9, and a chain extender having two active hydrogens capable of reacting with isocyanate. This is achieved by a method for producing a stretchable nonwoven fabric, which is characterized by obtaining a fiber web by spinning using a melt blowing method.

The aliphatic copolycarbonate polyol used in the present invention is described by Shell, Polymer Review (Polymer Review).
lymer Review) Volume 9, pages 9-20 (19
64), 1,6-
The base is made from hexanediol and 1,5-bentanediol. Its molecular weight is preferably 500-5.000
and the repeating unit in the polymer is (A) →0
(CHZ)60C←1 and O, and the ratio of A and B is 9:1 to 1:9, more preferably 7:3 to 3. The ratio of A and B is important, and when forming a nonwoven fabric by melt blowing, it is difficult to form a nonwoven fabric using a polyurethane consisting of only A or a polyurethane consisting of B alone. However, when polyurethane having the above ratio was used, it was surprisingly found that a soft nonwoven fabric with good stretch recovery properties was obtained, and also had good blowability.
We have arrived at the present invention.

Examples of the organic diisocyanate used in the present invention include 2,4-tolylene diisocyanate, 2,6-
Tolylene diisocyanate and mixtures thereof (TDI)
, diphenylmethane-4,4' diisocyanate (M
DI), naphthalene-1,5=diisocyanate) (M
DI), 3,3'-dimethyl-4,4'-biphenylene diisocyanate) (TODI), crude TDI,
Polymethylene polyphenylisocyanate, crude MDI
Known aromatic diisocyanates such as xylylene diisocyanate (XDI), known aromatic alicyclic diisocyanates such as phenylene diisocyanate, and 4,4'-methylenebiscyclohexyl diisocyanate (hydrogenated MD).
I), hexamethylene diisocyanate (HMDI)
, isophorone diisocyanate (IPDI), cyclohexane diisocyanate (hydrogenated XDI), and other known aliphatic diisocyanates.

As the chain extender used in the present invention, commonly used chain extenders in the polyurethane industry can be used, such as ethylene glycol, propylene glycol, 1,4
-butanediol, ■, 6-hexanediol, 3-methyl-1,5-bentanediol, cyclohexanediol, xylylene glycol, 1,4-bis(β-hydroxyethoxy)benzene, neopentyl glycol,
Examples include 3,3'-dichloro-4,4'-diaminodiphenylmethane, isophoronediamine, 4,4'-diaminodiphenylmethane, ethylenecyamine, tetramethinecyamine, hexamenediamine, hydrazine, dihydrazidetrimethylolpropane, glycerin, etc. It will be done.

Along with the aliphatic copolycarbonate polyol used in the present invention, a known high molecular weight polyol may be used in combination, depending on the use of the polyurethane, within a range that does not impair the effects of the present invention. Known high molecular weight polyols include polyoxyalkylene glycols such as polyethylene glycol, polypropylene glycol, and polyoxytetramethylene glycol, or polyether polyols such as alkylene oxide adducts of bisphenol A1 glycerin such as ethylene oxide and propylene oxide;
and dibasic acids such as adipic acid, phthalic anhydride, isophthalic acid, maleic acid, fumaric acid, and succinic acid, and ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, neopentyl glycol, and 1,6-hexanediol. , polyester polyols obtained by polycondensation reaction with glycols such as trimethylolpropane, polycaprolactone diol, polycarbonate diol, and the like.

As a method for producing polyurethane, a urethanization reaction technique known in the polyurethane industry is used.

In addition to 1,6-hexanediol and 1.5-bentanediol, the present invention also provides compounds having three or more hydroxyl groups in one molecule, such as trimethylolethane, trimethylolpropane, hexanetriol, pentaerythritol, etc. Polyurethanes using polyfunctionalized polycarbonates are also included in minor amounts.

Furthermore, in the aliphatic copolycarbonate polyol used in the present invention, 1,6-hexanediol and 1.5-
In addition to bentanediol, compounds having two or more hydroxyl groups in one molecule, such as 1.3-propanediol, 1,4-butanediol, 1.7-hebutanediol, 1.8-octanediol, 2 -ethyl-1,6-hexanediol, 2-methyl-1,3-propanediol, neopentyl glycol, 3-methyl-1,5-bentanediol, 1,3-cyclohexanediol, 1
．． 4-Cyclohexanediol, 2,2'-bis(4-
hydroxycyclohexyl)propane, 2-methyl-1
, 8-octanediol, 1゜9-nonanediol, p
-xylene diol, p-tetrachloroxylene diol, 1,4-dimethylolcyclohexane, bishydroxymethyltetrahydrofuran, di(2-hydroxyethyl)dimethylhydantoin, diethylene glycol,
A small amount of diol such as triethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, polytetramethylene glycol, thioglycol, etc. may be used as a copolymer component to the extent that the effects of the present invention are not impaired.

The polyurethane of the present invention is composed of a polyol, an organic diisocyanate, and a chain extender as described above, and the polyol component used in the present invention preferably accounts for 65% by weight or more of the total weight. If the content of the polyol component is low, the resulting nonwoven fabric will have low elongation and elongation recovery.

In the urethanization reaction, it is of course possible to use an appropriate amount of a polymerization catalyst known in the urethanization reaction, such as a tertiary amine or an organic metal salt of tin or titanium, if necessary. be. For example, “′′ by Keiji Iwata
“Polyurethane Technology” (published by Nikkan Kogyo Shimbun) No. 23-3
Examples include various polymerization catalysts described on page 2. These reactions may also be carried out using a solvent, and preferred solvents include dimethylformamide, diethylformamide,
Examples include one or more of dimethyl sulfoxide, dimethylacetamide, tetrahydrofuran, methyl isobutyl ketone, dioxane, cyclohexanone, benzene, and toluene.

Furthermore, various additives can be used to improve the heat resistance, light resistance, mold release properties, etc. of polyurethane. For example, Yoshinaga Abe and Makoto Sudo ed. “New Edition Plastic Compounds”
(Takaisha) Phenolic antioxidants, amine antioxidants, sulfur antioxidants, as described on pages 151 to 158,
Penzophenone-based, salicylate-based, benzotriazole-based, metal complex salt-based, hindered amine-based ultraviolet absorbers as described in "Phosphoric acid-based antioxidants or the above-mentioned R plastic compounding agents", pages 178 to 182, further reinforcing fibers, fillers, Coloring agents, mold release agents, flame retardants, etc. can be used.

The stretchable nonwoven fabric made from the aliphatic copolycarbonate polyol polyurethane described so far by the melt-blowing method has particularly excellent hot water resistance, light resistance, and heat resistance, as well as good stretch recovery and chemical resistance (especially dry cleaning properties). Moreover, it was found to have a soft texture.

The number average molecular weight of the aliphatic copolycarbonate polyol polyurethane used in the present invention is 30.000 to 150.
,000, and the number average molecular weight after making it into a non-woven fabric is 20.
000~100,000, further 25,000~90,
000. In particular, it is preferably 30,000 to 80,000. If the number average molecular weight of the nonwoven fabric is less than 20,000, the strength of the nonwoven fabric will be too low to be suitable for practical use, and the blowing properties will be unfavorable as there will be many beads. Moreover, if it exceeds 100,000, the die pressure during blowing increases, making it difficult to form a nonwoven fabric.

The average fiber diameter of the elastic fibers constituting the stretchable nonwoven fabric of the present invention is 0.5 to 30 tnn, and further 1 to 15 tnn,
In particular, it is preferably 1 to 10 Inn. If it is less than 0.5, the fiber strength will be low although it is flexible, and as a result, the nonwoven fabric strength will be low, which is not preferable. On the other hand, if it exceeds 30, the soft texture that is a characteristic of melt blowing will be lost. In particular, the properties of nonwoven fabrics include filter performance, water pressure resistance,
Considering the above, the average fiber diameter is particularly preferably 10 jrm or less.

The elastic nonwoven fabric of the present invention preferably has a basis weight of 5 g/rrr or more, particularly Log/rrf or more.

Below 5 g/rrf, the strength of the stretchable nonwoven fabric decreases.

In addition, it is recommended that a thermoplastic polymer be added to an extruder by chip blending or the like in an amount that does not impair the elongation properties that are the characteristics of the stretchable nonwoven fabric made of the aliphatic copolycarbonate polyol polyurethane of the present invention. It's not a hindrance. Examples include polyolefins (polyethylene, polypropylene, copolymers of ethylene and propylene, etc.), polyamides (nylon 6, nylon 66, etc.)
, nylon 12, etc.), polyvinyl chloride, and the like. The amount added will vary slightly depending on the type of thermoplastic polymer based on 100 parts by weight of polyurethane, but if it is less than 20 parts by weight, it is preferable as it will not significantly impair elongation recovery. Furthermore, depending on the type, the addition lowers the melt viscosity, improves the spinnability, and slightly improves the appearance of the nonwoven fabric.

Similarly, to the extent that the features of the stretchable nonwoven fabric of the present invention are not impaired, the nonwoven fabric may be colored by adding a coloring agent, such as titanium oxide, through chip blending or the like.

The stretchable nonwoven fabric of the present invention may be mixed with other synthetic fibers (polyester, polypropylene, etc.), recycled fibers, natural fibers, etc. (by spinning or post-processing, etc.).

It is particularly preferable to use a melt blowing method to obtain the stretchable nonwoven fabric of the present invention. An example of the melt blowing method of the present invention will be described below with reference to FIGS. 1 and 2.

The polyurethane is melted by extrusion [1], fed into a die 2, and extruded through a number of spinning orifices 12 arranged in a row provided in a nozzle. The molten polymer is extruded from orifice 12 through polymer channel 11 .

At the same time, the heated high-speed gas supplied through the gas inlet 13 is injected from the slits 15 provided on both sides of the orifice 12 through the gas header 14, and is blown against the flow of the extruded molten polymer. The gas header 14 and the injection slit 15 are connected to the nozzle 9 and the lip 10.
It can be provided between

The extruded molten polymer is pulled into the shape of ultrafine fibers 4, thinned, and solidified by the action of the high-speed airflow. The ultrafine fibers thus formed are transported by a pair of rotating rollers 6
6 to form a random web 5. Steam, air, etc. are suitable as the gas, and the gas conditions include a temperature of 150 to 350°C, preferably 200 to 300°C.
The C1 pressure is 0.1 kg/dG or more, preferably 0.2 to 4.0 kg/dG, although it varies depending on the discharge amount.

Extruder temperature is 170~300'C1, preferably 180~
It is 280°C.

In addition, the distance between the gou and the collector is also important from the viewpoint of improving the strength of the nonwoven fabric due to the dispersibility of the single fibers and the bonding between the single fibers through self-thermal adhesion. Better is 30cm or less.

As a thermal bonding method, the above-mentioned self-thermal bonding method is particularly preferable because it not only improves product quality by improving the dispersibility of single fibers but also is advantageous in terms of cost.

Furthermore, as another thermal bonding method, a hot embossing method, a hot roll method, a hot air method, an ultrasonic bonding method, etc. can be used. In particular, the hot roll method (e.g. upper metal roll, lower rubber roll) can apply pressure uniformly to the entire elastic nonwoven fabric, and by using a rubber roll (e.g. silicone rubber) for the lower layer with a hardness of 70°, it is possible to apply pressure uniformly to the entire elastic nonwoven fabric. It is preferable because it has good conformability, strengthens the bond between elastic fibers, improves the strength of the nonwoven fabric, and improves the surface smoothness. The temperature is 150°C or less, preferably 60 to 130°C, more preferably 80°C.
-120'C range, pressure is 0.5-100k
g/cm, preferably in the range of 1 to 75 kg/cm. When exposed to high temperature and pressure, it becomes a molten film and impairs breathability. In addition, at low temperatures and low pressures, thermal bonding becomes insufficient, making it impossible to improve the strength and surface smoothness of the nonwoven fabric.

The stretchable nonwoven fabric made of the aliphatic copolycarbonate polyol urethane of the present invention thus obtained had excellent dry cleaning resistance and hot water resistance compared to that made of polyester polyurethane.

〔Example〕

EXAMPLES The present invention will be explained in more detail with reference to Examples below.

The definitions and measurement methods of various physical properties shown in Examples and Comparative Examples are shown below.

◎Average fiber diameter (IM) Ten arbitrary points on the sample are examined using a Doji microscope at a magnification of 2000.
Take 10 photos at double magnification. Measure the diameter of any 10 fibers per photograph, and do this for 10 photographs. A total of 100 fiber diameter measurements are obtained and the average value is calculated.

◎Polymer beads: Refers to bead-shaped polymers having a diameter of several times to 500 times the diameter of the fibers constituting the web, or knob-shaped polymers formed at the ends or intermediate portions of fibers. Many of these polymer beads are extremely small and cannot be seen with the naked eye. Detection is facilitated by observation using a microscope or by increasing the fiber density of the web as it is or by pressing, calendering, entangling or other means.

0 strength and elongation; JIS L-10 for a 2 cm wide sample
According to 96, grip interval 5C111, tensile speed IQ (m
/min, and measure the strength elongation per 1 cm width at maximum stress.

◎100% elongation recovery rate: Grasp a 2cm wide sample with an interval of 1
2 cm and a tensile speed of 10 cm/min, it is stretched 100% and immediately recovered to its original length at the same speed. Before stretching, check the difference in stretching before and after stretching (
a) mm was determined and calculated using the following formula.

◎Dry cleaning property: After immersing in Perculen solution for 52 hours, Perculen was wiped off with a filter paper, and after air drying, the appearance was visually judged and the strength retention rate before and after immersion in Perculen was determined.

◎Light resistance: Discoloration and fading after 40 hours of irradiation using a fade meter.
The strength retention rate before and after irradiation was determined.

◎Mold resistance: A mold resistance test was conducted according to JIS Z 2911. A mixed mold spore suspension was sprayed onto the sample and cultured for 4 weeks at a temperature of 28°C and a humidity of 97%.
The state of mold growth was observed daily with the naked eye and under a stereomicroscope. Judgment was made based on the evaluation criteria below.

Evaluation criteria ○: No mycelial growth is observed in the inoculated part of the sample or test piece.

Δ: detected on the inoculated part of the sample or test piece. The area of hyphal growth that can be observed is The area does not exceed 173.

×: The area of mycelia growth observed in the inoculated part of the sample or test piece exceeds 1/3 of the total area.

472 parts (4,0 mol) of 1,6-hexanediol and 416 parts (4,0 mol) of 1,5-bentanediol were placed in a practical reactor.
1.8 mol) of sodium metal at 70-80°C.
4 parts (0.08 mol) were added under stirring. After complete reaction of the sodium, 472 parts (8.0 mol) of diethyl carbonate were introduced. The temperature was gradually raised, and finally the pressure of the reactor was reduced to 1Qnm+Hg or less, and the reaction was carried out at 200'C for 4 hours with strong stirring.

The produced polymer was cooled, dissolved in dichloromethane, neutralized, washed with water, dehydrated, removed the solvent, and dried. The obtained aliphatic copolycarbonate polyol (hereinafter referred to as PC-A
) had a molecular weight of 2,000.

200 parts of PC-A, 1 part of hexamethylene diisocyanate
00.8 parts of 1.4-butanediol as a chain extender and 43.44 parts of 1,4-butanediol as a chain extender and n as a terminal stopper were added to the prepolymer and reacted at 100"C for 4 hours to obtain an NCO-terminated prepolymer. After adding 0.52 parts of -butanol and 0.007 parts of dibutyltin dilauret as a catalyst and reacting at 170°C for 2 hours, the mixture was formed into strands using a screw type extruder and then passed through a pelletizer to produce pellets. The number average molecular weight of the polyurethane pellets was 48.
,000 C Toso GPG) ILG-802A used]
The percentage of people who were free from polio was 78.5%.

The polyurethane resin thus obtained was put into an extruder, heated and melted at an extruder temperature of 220°C while sealed with nitrogen, and the single holes were arranged in a row at a discharge rate of 0.2 g/min.
Using a melt blowing nozzle with a sharpened tip of 4 mmφ and having slits for jetting heated fluid at both ends,
1.2 kg of superheated steam at 270″C as a fluid
/ CTII G pressure was sprayed from the slit to turn the molten polymer into a draw wire, and the fiber group was collected on a moving net conveyor (distance between the gouer and the collector: 30 cm). The obtained web had no polymer beads, was a soft stretchable nonwoven fabric, and had the following physical properties.

・Average fiber diameter: 7㎜・Weight: 80g/㎜・Strength
; 602 g 7cm・Elongation
;430% 100% elongation recovery rate;95% Practical Team 1 Superheated steam pressure during blowing was set to 3.5 kg/c+fl
A web was obtained under the same conditions as in Example 1 except for using G.

The average fiber diameter of this stretchable nonwoven fabric is 1.8 urn
It had good physical properties and a very soft texture.

In the same manner as in Example 1, N of the prepolymer and the chain extender was added to
C010) By changing I, the number average molecular weight can be changed to 70,000,
Pellets of 1,50,000 and 170,000 were obtained and made into non-woven fabrics by melt blowing.

70,000, a good web similar to that of Example 1 was obtained.

With 15,000,000, the melt viscosity was too low, so balls formed frequently and a proper web could not be obtained.

170,000, the melt viscosity was too high, the die pressure increased, and the test was discontinued.

A performance comparison was made between the nonwoven fabric (A) obtained in Example 1 and a commercially available polyurethane nonwoven fabric (B) (Esbancione O).

Below, 944 parts of 1.6-hexanediol (8 parts
, 0 mol) under the same conditions as in Example 1,
Got the web. This nonwoven fabric had many beads, and its elongation recovery was low at 72%, and the texture was rough, so a good web could not be obtained.

〔Effect of the invention〕

Since the stretchable nonwoven fabric of the present invention is configured as described above, it is a nonwoven fabric that has excellent heat resistance, hot water resistance, and light resistance, and is also soft and has good stretch recovery properties and chemical resistance (especially dry cleaning properties). , clothing batting, poultice material, Supporter 1 elastic tape interlining, mouth elastics for clothing, bandages, diapers,
It can be expanded to a wide variety of product groups, including industrial supplies such as gloves, hats, and surgical gowns, as well as sporting goods.

The stretchable nonwoven fabric according to the present invention having the above-mentioned properties can be stably produced by the manufacturing method of the present invention using a melt blowing method.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a melt blowing process. FIG. 2 is a sectional view showing an example of a die used in the melt flow process. DESCRIPTION OF SYMBOLS 1... Extruder, 2... Melt blow die, 3... Gas pipe, 4... Ultrafine fiber group, 5...
... Random web, 6... Drive roller 7... Screen, 8... Calendar roll, 9...
Nozzle, 10... Lip, 11... Molten polymer channel, 12... Spinning orifice, 13... Gas inlet, 1
4...Lip gas header 15...Gas slit.

Claims (2)

[Claims] (1) A polyurethane comprising an organic diisocyanate, an aliphatic copolycarbonate polyol, and a chain extender having two active hydrogens capable of reacting with the isocyanate,
The aliphatic copolycarbonate polyol has as repeating units (A) ▲Mathematical formula, chemical formula, table, etc.▼ and (B) ▲Mathematical formula, chemical formula, table, etc.▼, and the ratio of A and B is 9:1 A stretchable nonwoven fabric characterized by being mainly composed of polyurethane thermoplastic fibers having a ratio of 1:9 to 1:9. (2) It has an organic diisocyanate and as a repeating unit (A) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ and (B) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ , and the ratio of A and B is 9:1 A stretchable nonwoven fabric characterized in that a fibrous web is obtained by spinning a polyurethane made of an aliphatic copolycarbonate polyol having a ratio of ~1:9 and a chain extender having two active hydrogens capable of reacting with isocyanate using a melt blowing method. manufacturing method.