KR0183475B1 - Polypropylene spunbond and method of making it - Google Patents
Polypropylene spunbond and method of making it Download PDFInfo
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- KR0183475B1 KR0183475B1 KR1019940038936A KR19940038936A KR0183475B1 KR 0183475 B1 KR0183475 B1 KR 0183475B1 KR 1019940038936 A KR1019940038936 A KR 1019940038936A KR 19940038936 A KR19940038936 A KR 19940038936A KR 0183475 B1 KR0183475 B1 KR 0183475B1
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
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Abstract
본 발명은 폴리프로필렌 스펀본드의 제조방법에 관한 것으로, 폴리프로필렌을 압출기에서 방사하여 냉각 및 연신한 후 네트 컨베이어에 적층하고 엠보스 롤러로 압착하여 제조하는 폴리프로필렌 스펀본드의 제조방법에 있어서 분자량분포가 3.0∼3.5 멜트 인덱스가 33∼35인 폴리프로필렌을 사용하여 방사하고 엠보싱 처리 후 온도 150∼160℃, 압력 3∼4㎏/㎠의 조건에서 가열, 압착하여 2차 열가공함을 특징으로 하며, 고신율을 유지하여 기능성 후가공시 섬유의 늘어짐 현상이 해소된 고품질의 폴리프로필렌 스펀본드를 제공할 수 있는 이점이 있다.The present invention relates to a method for producing a polypropylene spunbond, the molecular weight distribution in the method for producing a polypropylene spunbond is produced by spinning polypropylene spun in an extruder, cooled and stretched, laminated to a net conveyor and pressed with an emboss roller Is 3.0 to 3.5 using polypropylene having a melt index of 33 to 35, and after the embossing process, heat and press under conditions of a temperature of 150 to 160 ° C. and a pressure of 3 to 4 kg / cm 2. In addition, there is an advantage in that it is possible to provide a high quality polypropylene spunbond in which the elongation of fibers is eliminated during functional post-processing by maintaining a high elongation.
Description
제1도는 폴리프로필렌 스펀본드 제조공정의 개략도이다.1 is a schematic diagram of a polypropylene spunbond manufacturing process.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 노즐 2 : 슬릿형 챔버(chamber)1 nozzle 2 slit chamber
3 : 흡입장치 4 : 네트 컨베이어3: suction device 4: net conveyor
5 : 엠보스(emboss)로울러 6 : 플랫(flat)로울러5: emboss roller 6: flat roller
본 발명은 폴리프로필렌 스펀본드의 제조방법에 관한 것으로, 좀 더 상세하게는 분자량 분포(MWD : Molecular Weight Distribution)가 3.0∼3.5이고 멜트인덱스(MI : Melt Index)가 34∼35인 폴리프로필렌 원료를 사용하여 방사하고 엠보싱 처리 후 온도 150∼160℃, 압력 3∼4㎏/㎠으로 가열 및 압착처리하는 폴리프로필렌 스펀본드의 제조방법에 관한 것이다.The present invention relates to a method for producing a polypropylene spunbond, and more particularly, to a polypropylene raw material having a molecular weight distribution (MWD: Molecular Weight Distribution) of 3.0 to 3.5 and a melt index (MI: Melt Index) of 34 to 35. It relates to a method for producing a polypropylene spunbond which is spun by use, and is heated and pressed at a temperature of 150 to 160 ° C and a pressure of 3 to 4 kg / cm 2 after embossing.
종래로 부터 폴리프로필렌 스펀본드의 제조를 위하여 연신장치의 일종인 슬릿형 챔버를 이용하여 왔는데, 이 경우 저속의 연신 공기 만을 사용하도록 되어 있어 제품이 고신율을 유지하게 되고 이로 인해 기능성 후가공시 가이드 롤터치(Guide Roll Touch)에 의한 장력을 받게 되어 섬유의 늘어짐 현상이 심하게 발생된다.Conventionally, a slit-type chamber, which is a kind of drawing device, has been used for the production of polypropylene spun bond. In this case, only low-speed drawing air is used, so that the product maintains a high elongation and thus guide rolls for functional post-processing. Due to the tension caused by the touch roll (Guide Roll Touch), the sagging of the fiber is severely generated.
즉, 제1도에서 개략적으로 도시한 바와 같이 분자량 분포가 4.0∼4.5(멜트 인덱스 30∼32)인 폴리프로필렌 원료를 압출기를 이용 적정폭의 구금(1)을 통하여 방사하고 필라멘트화한 후 이를 슬릿형 챔버(2)에서 냉각시키면서 흡입장치(3)에 의해 연신시켜 네트컨베이어(4)로 네트(net)에 적층시킨다.That is, as shown schematically in FIG. 1, a polypropylene raw material having a molecular weight distribution of 4.0 to 4.5 (melt index 30 to 32) is spun through filament 1 of an appropriate width using an extruder, and filamented. While cooling in the mold chamber 2, it is extended by the suction device 3 and laminated on the net by the net conveyor 4.
적층된 필라멘트는 고온, 고압의 엠보스로울러(5)로 열접착되어 폴리프로필렌 스펀본드 제품화 된다.The laminated filament is thermally bonded with an embossed roller 5 of high temperature and high pressure to produce a polypropylene spunbond product.
이 때 냉각 및 연신 작용이 이루어지는 슬릿형 챔버(2)는 구금(1)과 마찬가지로 제품폭만큼 넓게 설치되며, 이 챔버내에서 냉각 및 연신 작업에 직접 기여하는 공기는 하부 흡입장치(3)에 의해 가속화된다. 그러나 구조상 하기식(Ⅰ)에 의하여 계산되어 지는 방사속도 1.000m/min를 넘지 못하게 된다.At this time, the slit-like chamber 2 in which the cooling and stretching action is performed is installed as wide as the width of the product as in the detention 1, and the air directly contributing to the cooling and stretching operation in the chamber is provided by the lower suction device 3. Is accelerated. However, the structural speed does not exceed 1.000m / min, which is calculated by the following equation (I).
이 같은 종래의 방법에 따라 제조되는 폴리프로필렌 스펀본드 제품은 고신율을 유지하게 되어 후가공시 적정폭을 유지하기 힘들며 공정상 품질 문제를 유발하게 된다.Polypropylene spunbond products manufactured according to such a conventional method is to maintain a high elongation is difficult to maintain the appropriate width during post-processing and cause quality problems in the process.
따라서 후가공업체에서는 이를 방지하기 위하여 로울러 간의 장력을 최저로 하여 권취하는 바, 이로 인해 완제품의 권취 형태가 불량하게 되고 섬ㅇ의 늘어짐 현사이 발생하는 문제점이 있었다.Therefore, in order to prevent this, the post-processing company winds the rollers with the minimum tension between the rollers. As a result, the winding form of the finished product is poor and there is a problem that occurs between sags.
본 발명자는 상술한 종래의 문제점을 해결하기 위하여 연구를 거듭한 결과, 폴리프로필렌 원료의 분자량 분포를 좁히고 폴리프로필렌의 용융점 수준에서 2차 열가공함으로써 저신율의 폴리프로필렌 스펀본드 제품을 얻을 수 있음을 착인하고 본 발명을 완성하게 되었다.The inventors of the present invention have repeatedly studied to solve the above-mentioned problems, and as a result, the polypropylene spunbond products of low elongation can be obtained by narrowing the molecular weight distribution of the polypropylene raw material and performing secondary heat processing at the melting point level of the polypropylene. The present invention has been completed.
즉, 본 발명은 분자량 분포가 3.0∼3.5이고 멜트 인덱스가 33∼35수준인 폴리프로필렌 원료를 사용하여 상술한 통상의 제조장치인 압출기를 이용 적정폭의 구금(1)을 통해 필라멘트화하고, 슬릿형 챔버(2)에서 냉각시킨후 흡입장치(3)에 의해 연신시켜 네트컨베이어(4)로 네트에 적층시키고, 적층된 필라멘트는 고온, 고압의 엠보스로울러(5)로 열접착하고, 이어서 폴리프로필렌의 융용점 수준인 150∼160℃의 온도 및 3∼4 ㎏/㎠의 압력하에서 플랫로울러(6)를 이용하여 2차 열가공함을 특징으로 한 저신율 폴리프로필렌 스펀본드의 제조방법을 제공하는 것이다.That is, the present invention filamentizes through a suitable width of the cap (1) using an extruder, which is the above-described conventional manufacturing apparatus, using a polypropylene raw material having a molecular weight distribution of 3.0 to 3.5 and a melt index of 33 to 35 level, After cooling in the mold chamber (2), it is stretched by the suction device (3) and laminated to the net by the net conveyor (4), and the laminated filaments are heat-bonded by the high temperature and high pressure emboss roller (5), and then the poly Provides a method for producing a low elongation polypropylene spunbond, characterized in that the secondary heat processing using a flat roller (6) at a temperature of 150 ~ 160 ℃, the melting point of propylene and a pressure of 3 to 4 kg / ㎠ It is.
본 발명에서 폴리프로필렌 원료의 분자량 분포률 3.0∼3.5로 멜트 인덱스를 33∼35로 한정한 것은, 분자량 분포가 좁고 멜트 인덱스가 높은 경우 배향성이 증가되어 동일 연신 조건에서 신율이 감소하기 때문이다. 즉, 분자량 분포가 3.0미만인 경우는 강도 저하가 발생하고, 3.5을 초과하는 경우는 신율감소의 효과가 미비하여 본 발명의 효과를 기대할 수 없다.In the present invention, the melt index is limited to 33 to 35 with a molecular weight distribution ratio of 3.0 to 3.5 of the polypropylene raw material, because when the molecular weight distribution is narrow and the melt index is high, the orientation is increased to reduce the elongation under the same stretching conditions. That is, when molecular weight distribution is less than 3.0, intensity | strength fall occurs, and when it exceeds 3.5, the effect of elongation reduction is insignificant, and the effect of this invention cannot be expected.
2차 열가공시. 열가공 온도를 150∼160℃로, 압력을 3∼4㎏/㎠로 한정한 것은 제시한 온도 및 압력의 상한치를 초괴할 경우 플랫 로울러(6)내에 필라멘트의 융착 위험이 있고 제시한 온도 및 압력의 하한치 미만일 경우 힛 세팅(heat setting)의 효과가 저하되어 본 발명의 효과를 기대할 수 없기 때문이다.Secondary heat processing. The limit of the heat processing temperature to 150 to 160 ° C and the pressure to 3 to 4 kg / cm 2 indicates that there is a risk of fusion of the filament in the flat roller 6 when the upper limit of the suggested temperature and pressure is exceeded. This is because the effect of heat setting is lowered if it is less than the lower limit of, and the effect of the present invention cannot be expected.
이 같은 본 발명에 따라 고신율을 유지하고 기능성 후가공시 섬유의 늘어짐 현상이 해소된 고품질의 폴리프로필렌 스펀본드를 제공할 수 있는 이점이 있다.According to the present invention there is an advantage to provide a high-quality polypropylene spunbond to maintain a high elongation and to eliminate the sagging of fibers during functional post-processing.
이하 실시예를 들어 본 발명을 상세히 설명하나 하기 실시예에 의하여 본발명의 범주가 제한되지 않음은 물론이다.Hereinafter, the present invention will be described in detail with reference to the following examples, but the scope of the present invention is not limited by the following examples.
[실시예 1]Example 1
분자량 분포가 3.0∼3.3이고 멜트 인덱스가 33∼35수준인 폴리프로필렌 원료를 압출기에서 방사하고 슬릿형 챔버를 이용하여 필라멘트를 만들어 포집 후 엠보싱 가공한다.Polypropylene raw materials having a molecular weight distribution of 3.0 to 3.3 and a melt index of 33 to 35 are spun in an extruder, and filaments are made using a slit chamber to be collected and embossed.
이후 플랫로울러를 이용하여 열가공온도 150℃, 압력3㎏/㎠로 2차 열처리하고 권취하여 폴리프로필렌 스펀본드 제품을 제조한 후신율, 인장강력 및 가공성을 평가하여 하기 표1에 나타내었다.After using a flat roller to heat treatment temperature 150 ℃, secondary heat treatment at 3kg / ㎠ pressure and wound to prepare a polypropylene spunbond product to evaluate the elongation, tensile strength and workability are shown in Table 1 below.
[실시예 2]Example 2
2차 열가공 온도를 160℃, 압력을 4㎏/㎠으로한 것 이외에는 실시예1과 동일한 조건 및 방법으로 폴리프로필렌 스펀본드 제품을 제조한 후 신율, 인장 강력 및 가공성을 평가하여 하기 표1에 함께 나타내었다.The polypropylene spunbonded product was manufactured under the same conditions and methods as in Example 1 except that the secondary thermal processing temperature was 160 ° C. and the pressure was 4 kg / cm 2, and the elongation, tensile strength, and workability were evaluated. Shown together.
[비교예 1]Comparative Example 1
분자량 분포가 4.3∼4.5 이고 멜트 인덱스가 30∼31수준인 폴리프로필렌 원료를 압출기에서 방사하고 슬릿형 챔버를 이용하여 필라멘트를 만들어 포집후 엠보싱 가공하여 폴리프로필렌 스펀본드 제품을 제조한 후 신율, 인장강력 및 가공성을 평가하여 하기 표1에 함께 나타내었다.Polypropylene raw material with 4.3 ~ 4.5 molecular weight distribution and melt index of 30 ~ 31 level is spun in an extruder, filament is made using a slit chamber, collected and embossed to produce polypropylene spunbond products, and then elongation and tensile strength And evaluated by the workability are shown in Table 1 together.
[비교예 2]Comparative Example 2
분자량 분포가 3.0∼3.3 이고 멜트 인덱스가 34∼35수준인 폴리프로필렌 원료를 압출기에서 방사하고 슬릿형 챔버를 이용하여 필라멘트를 만들어 포집후 엠보싱 가공하여 폴리프로필렌 스펀본드 제품을 제조한 후 신율, 인장강력 및 가공성을 평가하여 하기 표1에 함께 나타내었다.Polypropylene raw materials with a molecular weight distribution of 3.0 to 3.3 and melt indexes of 34 to 35 are spun from an extruder, filaments are made using a slit chamber, collected and embossed to produce polypropylene spunbond products. And evaluated by the workability are shown in Table 1 together.
[비교예 3]Comparative Example 3
분자량 분포가 4.3∼4.5 이고 멜트 인덱스가 30∼31수준인 폴리프로필렌 원료를 사용한 것 이외에는 실시예 1가 동일한 조건 및 방법으로 폴리프로필렌 스펀본드 제품을 제조한 후 신율, 인장강력 및 가공성을 평가하여 하기 표1에 함께 나타내었다.Except for using a polypropylene raw material having a molecular weight distribution of 4.3 to 4.5 and a melt index of 30 to 31 level, Example 1 was manufactured under the same conditions and methods to evaluate the elongation, tensile strength and workability. It is shown together in Table 1.
[비교예 4][Comparative Example 4]
2차 열가공 온도를 140℃, 압력을 2㎏/㎠으로 한 것 이외에는 실시예 1과 동일한 조건 및 방법으로 폴리프로필렌 스펀본드 제품을 제조한 후 신율, 인장강력 및 가공성을 평가하여 하기 표1에 함께 나타내었다.The polypropylene spunbonded product was manufactured under the same conditions and methods as in Example 1 except that the secondary thermal processing temperature was 140 ° C. and the pressure was 2 kg / cm 2, and the elongation, tensile strength, and workability were evaluated. Shown together.
[비교예 5][Comparative Example 5]
열가공 온도를 170℃, 압력을 5㎏/㎠으로한 것 이외에는 실시예1과 동일한 조건 및 방법으로 폴리프로필렌 스펀본드 제품을 제조한 후 신율, 인장강력 및 가공성을 평가하여 하기 표1에 함께 나타내었다.The polypropylene spunbonded product was manufactured under the same conditions and methods as in Example 1 except that the thermal processing temperature was 170 ° C. and the pressure was 5 kg / cm 2, and the elongation, tensile strength, and workability were evaluated. It was.
물성평가 시험방법은 KSK 0520 스트립방법(STRIP METHOD)에 의거하여 행하였다.The physical property evaluation test method was performed based on KSK 0520 strip method.
1）MD : MECHANICAL DIRECTION1） MD: MECHANICAL DIRECTION
2）CD : CROSS DIRECTION2) CD: CROSS DIRECTION
3）후가공성 평가에 있어서,3) In the post processability evaluation,
× : 불량 △ : 보통 ○ : 우수 ◎ : 아주 우수×: Bad △: Normal ○: Excellent ◎: Very good
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| KR1019940038936A KR0183475B1 (en) | 1994-12-29 | 1994-12-29 | Polypropylene spunbond and method of making it |
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| KR1019940038936A KR0183475B1 (en) | 1994-12-29 | 1994-12-29 | Polypropylene spunbond and method of making it |
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| KR960023379A KR960023379A (en) | 1996-07-20 |
| KR0183475B1 true KR0183475B1 (en) | 1999-05-01 |
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| KR (1) | KR0183475B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100478751B1 (en) * | 1998-11-07 | 2005-08-10 | 도레이새한 주식회사 | Manufacturing method of composite nonwoven fabric with excellent light transmittance and bacterial barrier |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102278013B1 (en) | 2017-12-21 | 2021-07-15 | 주식회사 엘지화학 | Method of preparation for polypropylene nonwoven |
-
1994
- 1994-12-29 KR KR1019940038936A patent/KR0183475B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100478751B1 (en) * | 1998-11-07 | 2005-08-10 | 도레이새한 주식회사 | Manufacturing method of composite nonwoven fabric with excellent light transmittance and bacterial barrier |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960023379A (en) | 1996-07-20 |
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