TW200417641A - Spunbonded nonwoven fabric, laminate including the same, and production methods thereof - Google Patents

Abstract

A spunbonded nonwoven fabric according to the invention comprises a conjugate fiber (I) that is made up of at least two polymers selected from: (1) an ethylene polymer having a specific melt flow rate (MFR), density, and Mw/Mn ratio (Mw:weight-average molecular weight, Mn: number-average molecular weight); (2) a specific propylene block copolymer comprising soluble and insoluble portions in n-decane at 25 DEG C; and (3) a propylene polymer other than the propylene block copolymer (2). The spunbonded nonwoven fabric has a specific volume of not less than 10 cm<SP>3</SP>/g. A laminate of the invention includes a layer comprising the spunbonded nonwoven fabric and a layer comprising a nonwoven fabric that has a smaller specific volume than that of the spunbonded nonwoven fabric.

Description

200417641 V. Description of the invention (1) 1. [Technical field to which the invention belongs] The present invention relates to a spunbond product and a method for manufacturing the same. This hair contains the spunbond non-woven fabric with thinness and excellent spunbond: 疋 About-sheet products that have been shrunk to a suitable cloth and its manufacturing method. The test, and the spunbond non-woven fabric that contains it. [Previous technology] Non-woven fabric is breathable and soft, and expands step by step. Depending on the application, its extensive use has been further improved. And all kinds of properties, and these properties need to be used in non-woven fabrics for cleaning products (such as Koduna Ten Corpse * α before or after the production of ㈣. Add disposable diapers and technical raw cotton) in the solid fit and comfort Touch. Recently cleared: floc 2 = shrinkage gives stable improvement to cleaning products. There is a demand for non-woven fabrics with proper shrinkage; Tochigi soft and comfortable JP + 7/232 40 9

In conclusion, the non-woven fabric is made of conjugate fiber containing two kinds of poly woven cloths, and the two types of polyester resins have different heat shrinkage characteristics. However, Seiyoshito JP ~ A-7 / 2324 09 does not provide any heat shrinkage characteristics (such as heat shrinkage VIII = specific records. In addition, the non-woven fabric containing this polyester resin is fluffy II: JP-A-2002 / 146663 and JP- A ~ 2002/146631 discloses a co-manufactured non-woven fabric. The conjugate fiber contains a propylene segmented copolymer and different polymers. However, these non-woven fabrics are not heat-shrinkable, so they are soft. Unsatisfactory. In addition, the two literatures do not mention discontinuity; == $ ♦

200417641

Shrink percentage. III. [Summary of the Invention] One of the objects of the present invention is to provide a spunbond sheet product that has excellent softness and comfortable touch, and has a moderate degree of non-woven fabric. Another aspect of the present invention is migration, including this spunbond method. Force—The purpose is to provide the manufacturer. The present inventor has found that it can be woven to a certain extent by heating and shrinking the spunbond non-woven fabric to a proper level, so that the spunbond non-woven fabric with the above purpose is obtained. ^ ~ The invention was completed based on this discovery. 'Pharyngeal QU 4 As the spunbond nonwoven fabric of the present invention contains a conjugate fiber (1), this fiber is made of ethylene polymer (1), propylene segmented copolymer (2) ), / Except, at least two dimers are selected from the propylene polymer (3) of the stilbene copolymer (2); of which: $ the spunbond non-woven fabric has a specific volume of not less than 10 c m3 / g; B The dilute polymer (1) has a melt flow rate (MFR, melt f low rate) of 10 to 100 g / 10 min (measured at 190 ° C under a load of 2.16 kg), 860 to 9 75 kg / density of m3, and Mw / Mn ratio of 1.5 to 5 (Mw: weight average molecular weight, Mη: number average molecular weight); and propylene segmented copolymer (2) contains 20 to 70% by weight insoluble at 25 ° C Part (2-1) in n-decane and 80 to 30% by weight at 25X: part (2-2) dissolved in n-decane, and the insoluble part (2-1) contains MFR 20 to 20 0g / 10min propylene

Page 9 200417641 V. Description of the invention (3) Polymers, and ethylenic units containing not more than 10_1% of the total, .τ ordinary and c4_8 alpha olefins. The dissolved part (2_2) contains propylene and ethylene units. Copolymer, &amp; Contains 2. Up to 70 m. Difficult early hydrocarbon units of acetamidine: with an inherent viscosity of not more than 2.0 dl / g. The propylene polymer (3) is preferably a propylene homopolymer or ethylene, and / or a C4-8 alpha olefin. Random copolymer. The spunbond nonwoven fabric of the present invention is preferably obtained by heating the spunbond nonwoven fabric, and the spunbond nonwoven fabric (a) has a value of 100. The heat recovery of not less than 10% = percentage and the heat shrinkage percentage of not less than 30% at 120 ° C, these heat shrinkage percentages have a ratio of not more than 3 (1 2 0 ° C / 1 0 0 ° C ). The method for manufacturing a spunbond nonwoven fabric according to the present invention includes heating a spunbond nonwoven fabric (a). The spunbond nonwoven fabric (a) includes a conjugated fiber (丨). The conjugated fiber is made of an ethylene polymer (丨), Propylene segmented copolymer (2), at least two polymers selected from propylene polymer (3) except for the olefin segmented copolymer (2), wherein: spout, spunbond nonwoven (a) A heat shrinkage percentage of not less than 10% at 1000 ° C and a heat shrinkage percentage of not less than 30% at 120 ° C. These heat shrinkage percentages have a ratio not exceeding 3 (12 (TC / 100 ° C) ; The ethylene polymer (1) has a melt flow rate (MFR) of 10 to 100 g / 10 mm in (measured at 190 ° C under a load of 2.16 kg), a density of 860 to 97 5 kg / m3, And a Mw / Mn ratio of 1.5 to 5 (Mw: weight average molecular weight, Mη: number average molecular weight); and a propylene segmented copolymer (2) containing 20 to 70% by weight insoluble at 25 ° C

Page 10 200417641 V. Description of the invention (4) The part (2-1) of n-decane and the part (2-2) dissolved in n-decane at 25 ° C by 80 to 30% by weight,-the insoluble part (2-1) A propylene polymer containing MFR 20 to 200 g / lOmin, and a total amount of ethylene units and C4_8 olefin units containing not more than 10 mol%, the dissolved portion (2-2) Copolymers containing propane, ethylene units, and C4_8 alpha ene smoke units, containing 20 to 70 mol% of total ethylene units and C4_8 olefin units, and having an inherent viscosity [π] of not more than 2.0 dl / g. The sheet product of the present invention comprises at least one layer of a spunbond nonwoven fabric as in any of the above embodiments. Preferably, the sheet product includes at least one layer of spunbond nonwoven fabric (A) and one layer of nonwoven fabric (B) having a smaller specific volume than the spunbonded nonwoven fabric (A). Preferably, the 'spunbond nonwoven fabric (A) is obtained by heating the spunbond nonwoven fabric (a), and the spunbond nonwoven fabric (a) has a heat shrinkage percentage of not less than 10% at 丨 00 and not at 1 2 0 C. A heat shrinkage percentage of less than 30%. These heat shrinkage percentages have a ratio of not more than 3 (120 ° C / 10.00. (:). Preferably, the non-woven fabric (B) is obtained by heating the non-woven fabric (b). The non-woven fabric (b) has a heat shrinkage percentage smaller than that of the spunbond nonwoven fabric (a). A method for manufacturing a sheet product such as the present invention includes: winding or heat bonding a layer including the spunbond nonwoven fabric (a) and a layer including the nonwoven fabric (b), the The spunbond non-woven fabric (a) contains a conjugated fiber (丨), which is composed of the ethylene polymer (1), the propylene segmented copolymer (2), and the propylene segmented copolymer (2). The propylene polymer (3) is made of at least two polymers. The non-woven fabric has a smaller heat shrinkage percentage than the spunbonded non-woven fabric, and then the heat-treated sheet product, wherein:

Page 11 200417641 V. Description of the invention (5) B --- Spunbond nonwoven (a) has a heat shrinkage percentage of not less than 10% at 100 ° C and a heat of not less than 30% at 120 ° c Shrinkage percentages, these heat shrinkage percentages have a ratio of no more than 3 (120 ° C / 100 ° C); the ethylene polymer (1) has a melting flow of 10 to 100 g / 10 mi η Rate (MFR) (measured at 190 ° C under a load of 2.16 kg), a density of 860 to 97 5 kg / m3, and a Mw / Mn ratio of 1.5 to 5 (Mw ·· weight average molecular weight, Mη: number average molecular weight) ; And acrylic segmented copolymer (2) containing 20 to 70% by weight of the portion (2-1) insoluble in n-decane at 25 ° C, and go to 30% by weight dissolved in n-decane at 25 ° C The decane portion (2-2), 'This insoluble portion (2-1) contains a propylene polymer with MFR 20 to 200 g / 10 min', and contains ethylene units and C4 in a total amount of not more than 10 mol% 8 alpha olefin units, the dissolved part (2-2) contains propylene, ethylene units, C4_8 〇: olefin unit copolymer 'comprising 20 to 70 m% of the total ethylene units and olefin units, and ultra 2 · 0 dl / g intrinsic viscosity [^. Fourth, [implementation] The following will be. Lamb ,,,, and Tian ° Mingming spunbond nonwoven fabric and sheet products containing the spunbond nonwoven fabric. <Spunbond Nonwoven Fabric> The spunbonded nonwoven fabric of the present invention includes a conjugate fiber (I), which is composed of an ethylene polymer G), a propylene segmented copolymer (2), and an acrylic segment At least two polymers selected from the propylene polymer (3) of the copolymer (2)

Page 12 200417641 V. Description of the invention (6) The spunbond non-woven fabric has been heat-shrinked to-the non-woven fabric can be added to the spunbond fabric and then ... the closed, square fiber, the total light fiber It is made of at least two polymers selected from the ethylene polymer suspects (2) and propylene mouthpieces (3) except for the propylene segmented copolymer (2). First, the (1) ethylene polymer used in the present invention will be explained. The Otome polymer (1) can be thought of as a secret 03 ethylene fluorene polymer or ethylene and α

"Ene" polymer. Alpha olefins contain 3 to 8 carbon atoms, such as propylene, butylene, 1-hexyl; J #, butylene, 4-methyl-pentene. Ethylene polymers ( 1) Examples of body shells include low-density polyethylene, linear low-density polyethylene (ethylene / α-olefin copolymer), medium-density polyethylene, and high-density polyethylene. ^ In the present invention, these ethylene polymers can be used alone or in two types Or multiple foods. • Ethylene polymers can be manufactured in a conventional manner, using multi-position catalysts such as Zieger catalysts, or using single-position catalysts such as metallocene catalysts.

Among the ethylene polymers listed above, from the standpoint of spinnability, linear low-density polyethylene resin (ethylene / α-olefin copolymer), medium-density polyethylene resin, and high-density polyethylene resin are particularly preferred. . When measured at 190 ° C and a load of 2.16 kg, the MFR of the ethylene polymer (1) is from 10 to 100 g / 10 min, preferably from 12 to 90 g / 10 min, or more preferably from 14 to 85 g / 10 min. As used herein, the ruler for ethylene polymer (1) is a value measured at ASTM D-1 23 8 at 190 ° C under a load of 2.16 kg. The MF R of the ethylene polymer (1) should be in the above range regardless of whether the ethylene polymer is alone or in groups

Page 13 200417641

V. Description of the invention (7)-Use ie "When the acetamidine polymer (1) itself does not have an MFR in the above range" but when mixed with one or more other ethylene polymers, the MFR in the above range is an ethylene polymer The mixture can be used as the ethyl compound (1) of the present invention. ~

The MFR of the ethylene t-composite (1) is one of the spinnability and strength of the non-woven fabric. The "Sulfin" ethylene polymer (1) has an MFR in the above range, and can obtain good spinnability when manufacturing a spunbond non-woven fabric. After heat shrinking, spunbond nonwovens will have high strength. On the other hand, when the foot length of the ethylene polymer (丨) is less than 10 g / 1 0 m 1 η, the spinnability is so poor that the nonwoven fabric is likely to be cut during the spinning process. A liver 1? Larger than 100 § / 1010111111 will result in a lower fiber strength &apos; resulting in a less strong spunbond nonwoven. The ethylene polymer (1) has a density ranging from 86 to 975 kg / m3, preferably from 865 to 9 73 kg / m3, more preferably from 905 to 9 75 kg / m3, and even more preferably from 91 to 973 kg / m3. The density of the ethylene polymer (1) can affect the sex and feel of the resulting spunbond nonwoven fabric. The serviceability is less than 860 kg / in3, which will cause the spunbond non-woven fabric to have a poor feel. The density of more than 975 kg / m3 will cause too high rigidity and deteriorate the touch.

The ethylene polymer (1) has a Mw / Mn ratio of 1.5 to 5 (Mw: weight-average molecular weight &apos; Mη: number-average molecular weight). As used in the specification, the weight-average molecular weight (Mw) and the number-average molecular weight (Mη) are values measured by polystyrene by gel chromatography (GPC) under the following conditions ...

Columns: Two TSKgel GMH6HT tubes and two TSKgel GMH6-HTL tubes

Tube temperature: 1 4 0 ° C

Page 14 200417641 V. Description of the invention (8) Mobile phase: o-dichlorobenzene (0DCB) Flow rate: 1.0 mL / min

Sample concentration: 30mg / 20mL 0DCB

Injection amount · 5 0 0 // L to dissolve 30 mg of the sample in 20 mL of o-dichlorobenzene, heat at 145 ° C for two hours' and pass the resulting solution through a sintered filter with 0 · 4 5 // m holes Filter to prepare analytical samples. The ethylene polymer (1) is contained in the conjugated fiber ⑴ in an amount of 20 to 80% by weight. (2) Propylene segmented copolymer The propylene segmented copolymer used in the present invention contains 20 to 70% by weight of a portion (2-1) insoluble in n-decane at 25 ° C, and 80 to 30% by weight of Dissolved in n-decane at 25 ° C (2-2). The insoluble portion (2-1) contains MFR (230 ° C, 2.16 kg load) propylene polymer of 20 to 200 g / 10 min, and ethylene units and C4_8 alpha hydrocarbon units containing not more than 10 total amount. As used herein, the MFR of the propylene polymer is a value measured in accordance with ASTM D-1 12 38 at 23 0 ° C and a load of 2.16 kg. The dissolved portion (2-2) contains a copolymer of propylene, ethylene, or a C4_8 alpha olefin, containing 20 to 70 — mol% of the total ethylene units and C4_8 alpha olefin units, and has an inherent viscosity of not more than 2.0 dl / g [乃]. As used herein, an ethylene unit is a structural unit derived from ethylene, and a C4_8 alpha olefin unit is a structural unit derived from a C4-8 «olefin having 4 to 8 carbon atoms.

Page 15 200417641 V. Description of the invention (9) 4 ~ 8 α dilute

The 4 to 8 hydrocarbons used in the C-linked copolymer (2) contain linear or branched alpha olefins. What to do 丨 —Anodic C-olefins, 1-hexene, 1-octene, 4-methyl-butene, 1 τ 1-1-pentene. It is particularly good in A. [~ Acrylic segmented copolymer (2) can be mixed together in a conventional manner. Or, according to the general use of ° for the polymerization of olefins = Ziegler_Natta catalyst or metallocene catalyst), the insoluble part (2-1) and the dissolved part (2 ~ 2) will form The components of W 2) are polymerized sequentially in two stages. In the acrylic segmented copolymer (2), the insoluble portion (2_〇 and dissolved (2-2) are perfectly dispersed. Therefore, the spunbond In the manufacture of non-woven fabrics / to good spinnability, the resulting spunbond non-woven fabrics: softness is imparted. T-propylene segmented copolymer (2) is included in the conjugate in an amount of 20 to 80% by weight In dimension (i). (3) propylene polymer propylene polymer (3) is a propylene polymer different from propylene segmented copolymer (2). Propylene polymer (3) may include propylene homopolymer or propylene Dilute, ~ ethylene, or (Vs «random copolymers of olefins (hereinafter" propylene random copolymers "). Propylene homopolymers include crystalline homopolymerized propylene, which has a regularity index preferably greater than 90. Preferably, the propylene random copolymer will contain not more than 10 m of the total ethylene units and C: 4-8 alpha olefin units. o 1%, better yet, Μ

Page 16 200417641 V. Description of the invention (ίο) From 0.05 to 10 mol%. The C4_8 alpha olefin package of 8 carbon atoms contains butylene, 1-pentene, and 1-3, among which 1 to butene is 4 to 4 linear or branched alpha olefins, especially used in the propylene polymer (3). Specific examples Hexene, 1-octene, 4-methyl-1-pentene are preferred. Preferably, the propylene polymer (3) is 2-30. (: The MFR measured under a load of 2el6kg ranges from 10 to 200g / 10min, or more preferably from 20 to 150g / l0min. As used herein, the liver r of the propylene polymer (3) is in astm D-1 238 is a value measured at 230 ° C under a load of 2.16 kg. Once, preferably, the propylene polymer has a Mw / Mn ratio of 5 to 5 (^: weight average molecular weight, Mη : Number average molecular weight). For the purpose of good spinnability and particularly high strength of the conjugate fiber, preferably the Mw / Mn ratio is in the range of 1 · 5 to 3 · 0. The propylene polymer (3) is 20 weight An amount of up to 80% is included in the total fiber (i). (Additives) In the present invention, 'various conventional additives can be selectively used in polymers (j L to (3)' as long as the purpose of the invention is not impaired. Additives include various stabilizers (such as thermal stabilizers and weathering stabilizers), fillers, antistatic agents, hydrophilic agents, slip agents, anti-blocking agents, anti-fog agents, lubricants, dyes, pigments, natural oils, and synthetic oils With wax, conventional stabilizers include anti-aging agents, such as dibutylhydroxytoluene% HT) #, and pentyl antioxidants, such as tetra [methylene-3-(3,5- Stupid dagger-butyl-4-yl) propionate] methane, cold _ (3, 5 - dibutyl - 4 - Hydroxyphenyl) propionic acid alkyl

200417641 V. Description of the invention (11) Principles, 2,2-Ethylenediamine amino group ~~ [[i] benzene]] propanoic acid, Irganox 1010 (steam; ^ earth ^ (3,5 monobutyl 4-hydroxy) △ People's articles show that the party hindered phenol-type antioxidants); Lipomagnesium Fatty I salts, such as zinc stearate, calcium stearate, 1,2-calcium hydroxystearate; polyhydric alcohol fatty acids Lipids, such as glyceryl monostearate, glyceryl distearate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate. These stabilizers can be used alone or in combination of two or more. Fillers include silica, diatomaceous earth, alumina, titanium oxide, oxidized pumice powder, pumice balloons, aluminum hydroxide, magnesium hydroxide, alkaline carbonate dolomite, calcium sulfate, potassium titanate, barium sulfate, calcium sulfite, High bentonite, graphite, aluminum powder, molybdenum sulfide. N 7 (a) Spunbond nonwoven I, Spunbond nonwoven (a) contains a copolymer made of at least two polymers selected from the above polymers (1) to (3). Yoke fiber (i). As used herein, ", fiber =" means a monofilament having at least two fiber phases, and the fiber phase has a long household, Diameter ratio, this length / diameter ratio makes the strand suitable to be called a fiber. Here%, is the diameter of a circular cross section of the fiber. In other words, "conjugate straight (i) i— 港 疋 么 〇 口, ^ ^ ,,, and David contain a polymer made from at least two fiber phases, and the fiber phase includes 3 = one of the polymers (1) to (3). The conjugate fiber G = 21 may have a sheath- Core configuration or side-by-side configuration. Specifically, there are three types of sheath-core configuration: 5, center circle: the circle core part and the donut-type sheath part are concentric with each other: t :: state with Γ core The part is completely contained within the sheath part and is round

Page 18 200417641 V. Description of the invention (12) The core configuration is exposed, in which the core part is partially exposed from the sheath part because their centers are far apart from each other. -Among the above-mentioned configurations (parallel configuration, eccentric configuration, and exposed core group separation), especially the parallel configuration and exposed core configuration are better. These cross-fiber cross-section configurations are shown in Figure 1, where (a) shows and arranges (b) shows a concentric arrangement, (c) shows an eccentric arrangement, and (d) shows an exposed core arrangement.

• The co-fibre (1) made of two or more of the polymers (1) to (3) can provide a spunbond nonwoven fabric (a) with appropriate heat shrinkage. In the present invention, the spunbond non-woven fabric (a) has a heat shrinkage percentage of not less than 10% at 100 t, and a heat shrinkage percentage of not less than 30% at 120 ° C, 12 (rc / 100 t: The ratio of the percentage of heat shrinkage is 3 or less, preferably 2.5, more preferably 2 or less. In addition, the heat shrinkage percentage at 140 C is preferably 95% or less. The shrinkage percentage M, the heat treatment of the spunbond non-woven fabric 将 will produce moderate, thin, so the heat-shrinkable spunbond non-woven fabric can be one. When at 120 ° C and 埶 ^ ^ ^ ^ ^.. ^ The percentage of the heat recovery percentage falls within the above range, and there will be no significant difference between 孰 1½ • start π \ wt, — ”, and the recovery percentage caused by thermal changes, so the temperature control of the heat treatment is easy. Ushi.

L1 906 measured value. In the present invention, the percentage of heat shrinkage is based on JIS in #Efiber (i), 敎 ^ and not less than 3% at 120%, and not less than 10% at 100 ° C, which is better than the expected 12 (rc / 100 ° c The percentage of heat shrinkage does not exceed 3, and underestimates τ such as and ra. The heat shrinkage percentage in Hire = 4 is over 2.5, and more preferably does not exceed 2. This dimension (υ has the above range = preferably 95% or Below. When the total heat shrinkage percentage of a car's fiber circumference has the above heat shrinkage

200417641 V. Description of the invention (13) The percentage of spinning point is not the percentage of heat shrinkage. When at 1 2 0. 〇 Significant shrinkage percentage at 100 ° C = 0 above range, there will be no heat caused by thermal change. /, So the temperature control of the heat treatment is easy to spunbond non-woven &amp; get a higher soft household 乂 / have a fineness of not more than 8 · 〇 In order to spunbond non-woven knives, is it more fine? Danxin is good from 12 to 90 g / m2. For example, the target range of the car is from 10 to 100 g / m2, and the weight is more. The "basis weight" used in the court is the fabric per unit area (preparation of spunbond non-woven fabric (a)). The method of spunbond non-woven fabric (a) ^ bonding method, which can be used in I σ to use any common Spin configuration. The sheath-core warp state is provided in the co-light fiber or the following will be described below. The ancient configuration, the parallel configuration package; 嗲 2 2; the preparation of the spunbond nonwoven (a) state, polymer ⑴ to ( 3) ;: two polymers in the substance (1) f (3). Melt in the first machine. According to the necessary |: the compound in the respective extruder or similar-or both 'and then with: It is configured by adding additives to the polymer. The side-by-side conjugate spun spun spinning = used to produce the desired and pull the gas to a predetermined fine sound. The crotch is cooled to pump. Then the net Perform winding treatments, such as pin collection tape sealing, or thermal bonding with hot embossing. Therefore, flushing, ultrasonic configuration of spunbond non-woven fabric "). People] ^ Want to include side-by-side; ..., the hot embossing roll of station a can be page 20 ZUU41 / 04 丄 5. Description of the invention (14) There are various percentages of embossed areas, hundred embossed areas, to use conjugate Spinning of fiber spinning nozzle; preferably 5 to 30%. State of the spunbond non-woven fabric (a), the total fiber spinning two sheaths: core: 'group health expectation sheath-core configuration. The Α-high-carbon fiber is designed to produce (heat treatment of the spunbonded nonwoven fabric (a)). The spunbonded nonwoven fabric obtained as described above is heated to obtain a spunbonded nonwoven fabric according to the present invention. ] = 而 而 用 造 ^ By spunbond non-woven fabric (a). Let ..., the direct heating temperature of the work rolling is generally from 901 to loot, to uot, preferably, more = 5 C To 180 seconds, preferably to 150 seconds, and more preferably to 120 seconds. The heat-shrinkable spunbond nonwoven fabric obtained above contains a total of fibers (I), which are made of at least two polymers selected from the following polymers: (1) ethylene polymer, 10 to 100 g Melt flow rate (MFR) at 10 min (measured at 190 ° c under a load of 2.16 kg), a density of 8 60 to 97 5 kg / m3 'and a Mw / Μη ratio of 1.5 to 5 (Mw : Weight-average molecular weight, Mn: average molecular weight in several deniers); | (2) propylene segmented copolymer, containing "by several ^ by weight of the insoluble portion (2-1), and 80 by weight To 30% at 25t: the part (2-2) dissolved in n-decane, 'the insoluble part (2-1) contains a liver ruler (23 0. (:, load 2.16kg) 20

Page 21 200417641 V. Description of the invention (15) to 200 g / 10min propylene polymer, and ethylene units and C4_8 alpha olefin units containing not more than 100% of the total amount, the dissolved portion (2-2 ) Copolymers containing propylene, ethylene units, and C4-8 alpha olefin units, containing 20 to 70 m ο 1% of total ethylene units and q alpha olefin units, and those having no more than 2.0 dl / g Intrinsic viscosity [々]; 4 2 and (3) propylene polymers other than propylene segmented copolymers (2). The conjugate fiber (I) is derived from the heat shrinkage of the conjugate fiber (i). The two-adhesive non-woven fabric has been heat-shrinked, so its specific volume is at least 10 cm3 / g, and preferably at least U cmVg, so it has excellent softness and touch. The upper limit of the specific volume; however, the capacity is preferably smaller than CJfl3 / g, more preferably less than 2 Bendability is not more than 40, preferably not more than 30 °, and the basis weight is 45. County arm method f melon, preferably not more than 20 _. Got. The bending resistance measured by the heart is measured by HS L 1 0 9 6 as measured by the spunbond non-stretching method of the present invention. J Turen A 1 1 small, I cloth has excellent shrinkage and softness. It has excellent stretchability, heat-sealing properties, and can be used in bathrooms. It also has good anti-fluff properties. Spin point is not = degree, /, strength. In addition, the method includes medical products and sanitary products. I cloth is useful for various applications, especially for sanitary products, spunbond non-woven fabrics, and disposable cotton. In the following, it will be explained that the sheet product of the present invention comprises at least one of: a shrinkable spunbond nonwoven 200417641 V. description of the invention (16) (hereinafter, the spunbond nonwoven α, the present spunbond nonwoven (A) and a layer of 溥The sheet product includes a specific volume of at least one layer of non-woven fabric (A).

For example, the spunbond nonwoven fabric of the present invention is also J series. ^ Ba Yao Diao satisfies the above specific volume. When = the specific volume of the non-woven fabric (A) and the non-woven fabric filled with 7 m L, (B) are excellent in fluff. In addition, the non-woven fabric (B) preferably heats a non-woven fabric (b): the woven fabric (bj has a smaller heat shrinkage percentage than the spunbonded non-woven fabric U). Examples of which should not include b) fiber (such as polyester =, polyester fiber (such as polyethylene terephthalate and polybutylene ^ ^) cloth &lt; -θ), = amine fiber (Such as resistance theory 6 and nylon 66), regenerated fibers (such as -50% of acetate fiber, natural fibers (such as cotton and wool) non-woven non-woven fabrics (b) is not particularly limited, but can also be as this Sticky non-woven fabric, only it has the percentage of heat shrinkage that satisfies the above relationship. The thermal shrinkage relationship between Fangdang spunbond non-woven fabric (a) and non-woven fabric (b) is 100%, and the obtained sheet product has excellent fluffiness. In order to produce sheet products such as the present invention, the spunbond non-woven fabrics can be laminated together and then wound up without puncturing, flushing, ultrasonic sealing, or thermally bonding by hot embossing, such as needle bonding . It is also possible to heat the spunbond nonwoven fabric (a) and the non-woven fabric by heating the spunbond nonwoven fabric (A) and the nonwoven fabric respectively.) These two j are better to use and overlap the former.

200417641 V. Description of the invention (17) Heat treatment can not be achieved in spunbond

The processing under the same conditions as that of the cloth (a) is completed. The present invention will be exemplified by the following examples. In the example and ratio (1), the amount of heat shrinkage percentage || The example is explained, but it should be understood that the present invention is not limited to the comparative example, the following properties are measured. From a sample without adding misconduct ... Long samples, three samples of 25 cm x 25 cm were taken for each sample width. In addition to receiving 1U near

On ~ ^ f, the sample is heated to a set temperature of 100 t or 12 0 C, and the eye is kept at this temperature β Λ &amp;, ^ t / 乂 ττη Bamboo ¥ 60 seconds, the percentage of heat shrinkage is based on JIS L1906 measurement.疋 (2) Measurement of basis weight 基 Basis weight 疋 is measured in accordance with JIS L1906. (3) Measurement of tensile strength and extensibility Five samples were taken from the non-woven fabric, each of which was 150 mm in the machine direction (MD, machine direction) and in the transverse direction (CD, cr0ss).

direction) 25mm. Five other samples were taken from the same nonwoven, each at 25 mm in MD and 50 mm in CD 1. The first five samples were subjected to a tensile test using a continuous stretch tensile tester at a chuck distance of 100 mm and a stress rate of 100 mm / min. Measure the maximum load of the five samples in the machine direction, the elongation at the maximum load, and the elongation at break, and average the results. The maximum load in the mechanical direction of the last five samples, the elongation at the maximum load, and the elongation at break were also measured by a tensile test, and the results were averaged. (4) 4 5 ° Cantilever method for bending resistance measurement

200417641 V. Description of the invention (18) 仉 Take out three samples of non-woven fabric, each of which is taken at MD 150mm, and at CD 1 JT, take the other three samples, each at MD 20mm and at CD 150. / The first three samples were measured with Jis u906 in the mechanical direction to measure the bending resistance and the transverse measurement was averaged. The last three samples are based on JIS L1 906 at eight points. The results are averaged. (5) = Han (ile —〇—Meter's bending resistance measurement inn ^ No, the cloth is taken out of two samples, each in MD 100mm, in ⑶ bend :: U_9 0 6 in the machine direction (MD) and in The transverse direction (CD) is used to measure the specific volume of the concrete. The average value of the three samples is used as the bending resistance of the non-woven fabric. ^ After heat treatment, the ratio of the thickness of the non-woven fabric is measured in accordance with JIS L 1 906. (2) The obtained basis weight is substituted into the following formula to obtain the non-woven specific volume (cm3 / g) = thickness / basis weight (7). Touch a. The touch of a sheet product is evaluated according to the following criteria: Very good Good equivalent to a less flexible nonwoven (8) Looseness a The loftiness of sheet products is evaluated according to the following criteria: Very good Good equivalent to less flexible non-woven fabric

Page 25 200417641 V. Description of the invention (19) (Example 1) A propylene segmented copolymer (BPP) contains: 40% by weight of insoluble portion (2-1), including a polypropylene (melting point Mg ° C, MFR (23 0 ° C, load 2.16kg) ·· 60g / 10min, ethylene unit content: 4.0 mol%), and 60% by weight of the dissolved part (2-2), including propylene / acetam copolymer Rubber (intrinsic viscosity [7?]: 1.59 dl / g, ethylene unit content: 30 mol%); and homopolypropylene (HPP) (melting point 162 ° C, MFR (23 0 ° c, load 2.16) kg) -BOg / lOmin 5Mw / Mn -2.5) j The textile is melted and deposited on a collection surface. The obtained conjugate fiber has an exposed core configuration, in which the core includes homo polypropylene, the sheath includes propylene, and the copolymer, and has a weight ratio of 20/80 (HPP / BPP). Then add the sediment and press the deposit with embossing roll (embossed area percentage · 18%) to produce a spunbond with a basis weight of 20 g / m2 and a fiber fineness of 3 deniers. Non-woven fabric a1): The properties of the spunbond non-woven fabric (a)) were measured before heat treatment, as shown in Table 1. The quality of the square-bonded non-woven fabric (a _ 1) was heated in a furnace at 120 ° C for 6 q seconds, and the fine-bonded non-woven fabric (A_ 丨) was collected. Table 1 shows the L-value of the spunbond nonwoven fabric (& — 丨). The same as diene (HPP) melts the textile separately, one side of π eight L. The deposit is then heated and embossed and rolled (embossed area percentage: 1%, two m, n ^ here> child product 'to produce a square-bonded non-woven fabric with a basis weight of 20 g / m2 ( b-1). Spunbond non-woven fabric (b-1)

200417641 V. Description of the invention (20) It is found that at 120 t: it has a 0% heat shrinkage percentage. For reference, a heat-shrinkable spunbond nonwoven fabric (B-1) was obtained by heating the spunbond nonwoven fabric (b-1) at 120 ° C for 60 seconds. The heat-shrinkable spunbond nonwoven fabric (B- 丨) had a specific volume of 8 ·. After laminating the spunbond nonwoven fabric (ad) and the spunbond nonwoven fabric ⑼— 丨), they were thermally bonded with a heat embossing roll (embossed area percentage: 丨 0%) to obtain a sheet product (1). The sheet product (1) is heated a12 (rc, the percentage of its heat shrinkage at this temperature is measured. F = the sheet product (1) is heated at 120 ° C for 60 seconds to obtain a

Two shrink_sheet products. Evaluate the touch and fluff of the sheet product. The results are shown in Table 1. (Example 2) Qiu take f sticky non-woven fabric (a ~ 2) made by the procedure of Example 1, except for the acrylic section with man'c?), I !: f ^ ^ ^ ^; 948g / cm3, Siebel Z L 16kg ): 30g / 10min, Mw / Mn: 3.0) The properties of the nonwoven fabric (a-2) were measured before the heat treatment.遥 = ,， 方 "The non-woven fabric (a-2) was heat-treated in the same way as in Example 1, while Dingfu Zhe, 5 spunbond nonwoven fabric (A_2) ° Measured the spunbond nonwoven fabric (A-2) to confirm its properties: Result As shown in the example. W Example 1-Le A-Hall of γ ° Γ is not programmed to make a thin sheet product (2), and it is measured at 1 2 0, the ratio is from α 。. The sheet binding product (2) is an example. 1 The same method is shown in Table i. <The feel and bulkiness of the heat-shrinkable sheet product. The results are shown in (Example 3) spunbond non-woven fabric (V U ~ 3). Acrylic

Page 27 200417641

Segmented copolymer (BPP) is copolymerized with ethylene, MFR (19 (TC, load 2.i "g) instead. Spunbond nonwoven (a-3) is then, and then spunbond nonwoven (a-3) generates heat The properties of the shrinkable spunbond non-woven fabric (human-3) were determined. The results are shown in Table 1. Material (PE2) (density: 0.930 g / cm: 60 g / 10 min, Mw / Mn: 2. 7) Measure the properties before heat treatment. Heat treatment in the same way as in Example 1, and measure the spunbond non-woven fabric (A-3) to make sure that it is made in the same way as in Example 1. ^ 〇, Jinqifeng, special film products ( 3), and measure its heat shrinkage percentage at 120 C. The soil opening r Q, f &amp;, μ ㈡ 刀 g 溥 月 衣 口 口 (3) was heat treated in the same manner as in Example i, and the resulting heat shrinkage book was evaluated. Pianluo α Team, 佴 漘, 佴 漘 is the touch and fluffy of the mouth. The results are as shown in Table 1. Table 1 Example 1 Example 2 Example 3 Core / sheath HPP / BPP HPP / PE1 HPP / PE2 Heat treatment Then (before the fabric heat shrinks)-basis weight (g / m2) 20 20 20 basis {Cr / ^? Tnfn ^ MD 500 680 1200 CD 140 80 230 extension under maximum load (^ 0) MD 142 17 79 CD 262 47 93 Elongation at break Length (%) MD 167 68 88 CD 300 142 105 Bending resistance (45β cantilever method) (mm) ^ -----—_____ ___——-- MD 28 40 38 CD 10 17 16

Page 28 200417641 V. Description of the invention (22)

Handle-0-Meter (g) _MD 0.7 1.7 1.6 CD 0.7 0.7 0.9 Percent heat shrinkage (%) 100 ° C 24 32 30 120 ° C 40 _ 45 46 1401: 62 71 74 l20 ° C Heat shrinkage percentage / 100 ° c heat shrinkage percentage 1.7 1.4 1.5 Before heat treatment (before the fabric heat shrinks) Bending resistance (45 ° cantilever method) (_) MD 22 29 27 CD 9 15 14 Bending resistance (Handle-0- Meter) (g) MD 1.4 1.5 L7 CD 1.3 2 2.4 Specific volume (cm3 / g) 11.3 15.2 14.2 Percent heat shrinkage of sheet products ί 12〇ΤΛ 30 35 37 Tactile A—AA Canopy AAA MD: Mechanical direction, CD: Horizontal

(Comparative Example 1) __ The homopolypropylene (HPP) used in Example 1 was separately melted and woven, and single: H fibers were deposited on a collection surface. Then heat the deposit and press it to determine the area percentage of the grain (2%: 18%), and produce a material with a cloth (a-4) and measure its properties before heat treatment:? '、 Square sticking not Then, spunbond non-woven fabric (a_4) Yishi &lt; π Jin not. U 4; Μ Example 1 heat treated in the same way, and

Page 29 200417641 V. Description of the invention (23) Generates heat-shrinkable spunbond nonwoven fabric (A-4). Spunbond nonwovens (a-4) were measured to determine their properties. The results are shown in Table 2. . A sheet product (4) was made according to the procedure shown in Example 1, and its heat shrinkage percentage at 120 C was measured. The sheet product (4) was heat-treated in the same manner as in Example j, and the feel and bulkiness of the obtained heat-shrinkable sheet product were evaluated. The results are shown in Table 2. (Comparative Example 2) A propylene / ethylene random copolymer (RPP) (melting point 138, mfr: 60 g / 10 mi η) was melted separately, and single component fibers were deposited on a collection sheet. Surface. The deposit is then heated and pressed with an embossing roll (embossed area percentage: 18%) to produce a spunbond non-woven fabric (a-5) having a basis weight of 20 g / m2 and a fiber fineness of 3 Dan ^. . The spunbond nonwoven fabric "-5) was measured for its properties before heat treatment, and the results are shown in Table 2. Then, the spunbond nonwoven fabric U-5) was heat treated in the same manner as in Example 1, and the heat-shrinkable spunbond nonwoven fabric (A-5) Measure the spunbond non-woven fabric (A_5) to confirm its properties. The results are shown in Table 2. A sheet product (5) was made using the procedure shown in Example 1, and its heat shrinkage percentage at 12 = was measured. Sheet product ( 5) Using an example] Heat treatment in the same way ^ 'Evaluate the feel and bulkiness of the obtained heat-shrinkable sheet product. The results are shown in Table 2. (Comparative Example 3) The propylene segmented copolymer (BPP) used in Example 1 ) Melting spinning separately: Mono-component fibers are deposited on a collection surface. The deposit is then heated and the deposit is pressed with an embossing roll (embossed area percentage: 18%) to produce

Page 30 200417641 V. Description of the invention (24) A spunbond nonwoven fabric (a-6) having a basis weight of 20 g / m2 and a fiber fineness of 3 deniers was produced. The properties of the spunbond nonwoven fabric (a_6) were measured before heat treatment, and the results are shown in Table 2. Then the 'spunbond nonwoven fabric (a-6) was heat-treated in the same manner as in Example 1 to produce a heat-shrinkable spunbond nonwoven fabric (A-6). Measure the spunbond nonwoven (a-6) to make sure it is ready. The results are shown in Table 2. A sheet product (6) was made according to the procedure shown in Example 1, and its heat shrinkage percentage at 120 ° C was measured. The sheet product (6) was heat-treated in the same manner as in Example i. The tactile and bulky properties of the heat-shrinkable sheet product obtained by Hiraichi. The results are shown in Table 2. Core / sheath Before disc processing (before the fabric heat shrinks) Basis weight (g / m2)

--Comparative Example 2 Comparative Example 3 RPP BPP 20 20

CD 1400 410 ^ 00 700 140 Stretch at maximum load (%)

CD 53 54 47 144 48 194 Elongation at break (%)

CD 57 52 157 63 58 208 Bending resistance (45B cantilever method) (_)

CD 24 46 22 40 20

200417641 V. Description of Invention (25)

MD: Mechanical direction, CD transverse direction, *: Represents that the fabric has been melted and heat-treated (before the fabric is heat-shrinked) Po resistance (45 cantilever method) (mm) MD 56 CD --- 28 Bending resistance MD ____ a 2.6 (Handle- Ο-Meter) (g) CD 1.7 Specific volume (cm3 / g) 8.6 Heat shrinkage percentage of sheet product (120ΤΛ 丨 &quot; 1 ·. · 1 ----— Touch || ·-I- Puffiness &quot; &quot; &quot; ...—............................... ..—— 一 —_ι 丨A --------% The collared spunbond non-woven fabric of the present invention has been shrunk to a strength, stretchability, spinnability, day / spear recognition, and excellent in the field. Therefore, the balance of the velvet resistance of the spunbond non-woven fabrics is appropriate for various applications, such as medical products and health products. Weaving fabrics are particularly suitable for applications including /, Dagger material. Spunbond cannot be used. J Disposable diapers and sanitary products

Page 32 200417641 Simple illustration of the drawing 5. [Simplified illustration of the drawing] Figure 1 shows the cross section of the conjugate fiber. Figure 1 (a) shows the cross section of the sad group. Figure 1 (b) shows a cross section of the concentric sheath-core configuration. Figure 1 (c) shows a cross section of the eccentric sheath-core configuration. Figure 1 (d) shows a cross section of the sheath-core type exposed core configuration. [Explanation of symbols] 1: The first polymer

2: Second polymer 3: Core part 4. Sheath part

Page 33

Claims (1)

200417641 VI. Scope of patent application 1 · A spunbond non-woven fabric containing a conjugate fiber (I), which is composed of an ethylene polymer (1), a propylene segmented copolymer (2), and a propylene segment At least two polymers are selected from the propylene polymer (3) of the copolymer (2), in which: the spunbond nonwoven fabric has a specific volume of not less than 0 cm3 / g; the ethylene polymer (1) has 10 to 100 g / 10 minutes of melt flow rate (MFR, melt f low rate) (measured at 190 ° C under a load of 2.16kg), a density of 860 to 9 75kg / m3, and a Mw / Mn ratio of ι · 5 to 5 ( Mw: weight average molecular weight, Mη: number average molecular weight); and propylene segmented copolymer (2) containing 20 to 70% by weight of the n-decane-insoluble portion (2-1) at 25 ° C, and 80 by weight To 30% of the part (2-2) dissolved in n-decane at 25 ° C, the insoluble part (2-1) contains propylene polymer with MFR 20 to 20 g / l0 in, and contains not more than 10 mol% of total ethylene units and c4_8 alpha olefin units, and the dissolved portion (2-2) contains a copolymer of propylene, ethylene units, and C48 alpha olefin units, including It contains 20 to 70 ml% of total ethylene units and C4 8 alpha olefin units, and has an intrinsic viscosity [π] of not more than 2.0 dl / g. 2. The spunbond non-woven fabric according to item 1 of the application, wherein the propylene polymer (3) comprises a propylene homopolymer or a random copolymer of propylene, ethylene, and olefin. 3. If the spunbond non-woven fabric in item 1 of the patent application scope, 200417641 VI. Scope of patent application It was obtained by weaving cloth (a), and the spunbond 墦 Α 布 (&amp;) has a value of 100. Not less than 0%] Heat shrinkage percentage of nft and heat shrinkage percentage of not less than 30% at 120.0 η .., 10% I These heat shrinkage percentages are unprotected ^. Sorry, the ratio of 9 knives, and the ratio of% to 3 (120. (: / 100.〇. 4) A method of making spun-bonded non-woven fabrics-a method of inserting pills into clothing, including heating a spun-bonded non-woven fabric ( a) while shrinking the spunbond nonwoven fabric (a), the spunbond nonwoven fabric (a) contains-1 fiber ⑴, the total fiber ⑴ is composed of ethylene polymer ⑴, acrylic copolymer (2), except At least two polymers are selected from the propylene polymer (3) of the propylene segmented copolymer 其中, wherein: the spunbond nonwoven fabric (a) has a heat shrinkage percentage of not less than 10% at 100 ° and 120 ° The heat shrinkage percentage is not less than 30% at C, and these heat shrinkage percentages have a ratio of not more than 3 (12.0 / 1.00); the ethylene polymer (1) has 10 to 1000 g / 10 min melt flow rate (MFR) (measured at 190 ° C under a load of 2.16 kg), a density of 8 60 to 97 5 kg / m3, and a Mw / Μη ratio of 1.5 to 5 (Mw: Weight average molecular weight, Mu: number average molecular weight); and propylene segmented copolymer (2) containing 20 to 70% by weight at 25 X: n-decane-insoluble portion (2-1) With 80 to 30% by weight of the part (2-2) dissolved in n-decane at 25 ° C, Shi Haibu> Valley part (2-1) contains acrylic polymer with MFR 20 to 200g / 10min, and Copolymer containing not more than 0 mol% of ethylene units and c4_8 alpha olefin units, and the dissolved portion (2-2) containing propylene, ethylene units, and C4_8 alpha olefin units, containing 20 to 70 m ο 1% Total ethylene units and C4_8 αene Page 35 200417641 VI. Scope of patent application Hydrocarbon units, with inherent viscosity not exceeding 2.0 dl / g [7?]. 5. A sheet product comprising at least one layer of a spunbond nonwoven as described in claims 1 to 3 of the patent application. 6 · A sheet product comprising at least one layer of spunbond nonwoven fabric (A) and one layer of nonwoven fabric (B) having a smaller specific volume than the spunbond nonwoven fabric (A). 7. For example, the sheet product of the scope of patent application No. 6, wherein the spunbonded nonwoven fabric (A) is obtained by heating a spunbonded nonwoven fabric (a), and the spunbonded nonwoven fabric (a) has a temperature of not less than 10% at 100 ° C. The percentage of heat shrinkage and the percentage of heat shrinkage not less than 30% at 120 ° C. These percentages of heat shrinkage have a ratio of not more than 3 (12 0 t: / 100 〇C). 8. The sheet product according to item 7 of the application, wherein the non-woven fabric (B) is obtained by heating a non-woven fabric (b), and the non-woven fabric (b) has a heat shrinkage percentage smaller than that of the spunbond non-woven fabric (a). 9. A method for manufacturing a sheet product, comprising: winding or heat-bonding a layer including a spunbond non-woven fabric (a) and a layer including a non-woven fabric (b), the spunbond non-woven fabric (a) including a total of fibers (i), the total The yoke fiber (i) is made of at least two polymers selected from an ethylene polymer (1), a propylene segmented copolymer (2), and a propylene polymer (3) other than the propylene segmented copolymer (2). Non-woven Page 36 200417641 It has a smaller heat shrinkage percentage than the spunbonded sheet σ ′ cloth, and the eight woven fabric obtained after the heat treatment (a) has a heat shrinkage of 100% at 100 ° C, and no less than 120 ° C. 30% heat shrinkage percentage, these heat shrinkage percentages have a ratio of no more than 3 (120 ° C / 1 00 ° C); #,, ethylene polymer (1) has a melt flow rate (MFR) of 10 to 100 g / lOmin 'melt fl〇w rate) (measured at i90 ° C under a load of 216kg), a density of 860 to 9 75 dagger 2 /! 113, and a ratio of% to / ^ 11 from 1.5 to 5 (11 ¥: weight average Molecular weight, Mη: number average molecular weight); and the propylene segmented copolymer (2) contains 20 to 70% by weight of the n-decane-insoluble portion (2-1) at 25 ° C, and 80 to 30% by weight The part (2-2) dissolved in n-decane at 25 ° C. The insoluble part (2-1) contains a propylene polymer with MFR20 to 200g / 10min, and an ethylene unit containing not more than 10 mo 1% of the total amount. And C4_8 alpha olefin mouthful. • The dissolved part (2-2) contains a copolymer of propylene, ethylene units, and C4_8 alpha olefin units, and contains 20 to 70 mol% in total. The ethylene unit and the Cl8 a soot unit have an inherent viscosity of not more than 2.0 dl / g [? 7].