본 발명은 열융착성 복합섬유에 관한 것으로서, 보다 구체적으로는 복합되는 폴리머들 사이의 계면접착력이 우수하고 형태안정성이 우수한 폴리에틸렌테레프탈레이트/폴리에틸렌계 열융착성 복합섬유에 관한 것이다.The present invention relates to a heat sealable composite fiber, and more particularly, to a polyethylene terephthalate / polyethylene heat sealable composite fiber having excellent interfacial adhesion between the polymers to be composited and excellent shape stability.
현재까지 열융착섬유로서, 2종의 폴리머, 즉 폴리에스테르/폴리에스테르, 폴리에스테르/폴리올레핀, 폴리올레핀/폴리올레핀을 심초형(Sheath-core type)으로 복합방사한 후 연신 및 부직포공정을 거쳐 제작된 웹형태를 소정의 온도에서 열처리하여 섬유상호간을 접착되도록 한 특허가 공지되어 있다(참조: 일본특허공보 소54-44773호).Until now, as a heat-sealed fiber, a web made through a composite spinning of two kinds of polymers, that is, polyester / polyester, polyester / polyolefin and polyolefin / polyolefin into a sheath-core type, followed by stretching and nonwoven fabric processes Patents are known in which a form is heat-treated at a predetermined temperature to bond fibers together (see Japanese Patent Application Laid-Open No. 54-44773).
이들중 폴리에스테르/폴리에스테르로 구성된 심초형 열융착섬유의 경우 초(sheath)에 해당하는 바깥부분은 보통 공중합 폴리에스테르가 사용되는데, 열융착온도에따라 공중합조성비를 달리하여 비결정형수지에서 잠재 결정성수지 그리고 결정성수지까지 다양하게 제조할 수 있다.In the case of sheath type heat-sealed fiber composed of polyester / polyester, the outer part corresponding to sheath is usually made of co-polyester, and the latent crystals in amorphous resins are changed by varying the copolymer composition ratio according to the heat-sealing temperature. Various types of resins can be prepared, including resins and crystalline resins.
폴리에스테르/폴리올레핀으로 구성된 심초형 열융착섬유의 경우에는 심(core)성분은 보통 폴리에스테르를 사용하고 초성분은 폴리에틸렌이나 폴리프로필렌과 같은 폴리올레핀을 주로 사용하는데, 열융착온도는 폴리올레핀의 용융온도 부근이라고 할 수 있다.In the case of the core sheath type heat-sealed fiber composed of polyester / polyolefin, the core component is usually polyester and the super component is mainly polyolefin such as polyethylene or polypropylene. The heat melting temperature is near the melting temperature of the polyolefin. It can be said.
또한, 원가절감을 위하여 심성분과 초성분이 모두 폴리올레핀/폴리올레핀으로 구성된 열융착섬유도 개발되었는데, 주로 심성분은 폴리프로필렌을 사용하고 초성분은 폴리에틸렌을 사용하고 있다.In addition, heat-sealing fibers, in which both core and supercomponents are made of polyolefin / polyolefin, have been developed for cost reduction. The core component is polypropylene and the supercomponent is polyethylene.
그러나 종래의 폴리에스테르/폴리올레핀계 및 폴리올레핀/폴리올레핀계의 심초형 섬유들은 폴리에스테르/폴리에스테르 심초형 섬유와는 달리 상용성이 좋지않아 계면간의 접착성이 불량한 단점이 있다.However, conventional polyester / polyolefin-based and polyolefin / polyolefin-based heart sheath fibers have a disadvantage in that they do not have good compatibility unlike polyester / polyester sheath-type fibers and thus have poor adhesion between interfaces.
계면간의 접착은 방사공정 및 연신공정 등 인장 및 전단장력이 가해지는 공정에서 섬유품질에 중요한 영향을 미치는데, 예를들어 심초간의 계면간접착력이 좋지 않을 경우, 방사공정에서 심성분과 초성분 사이에 슬립이 일어나 단사현상이 일어날 수 있고, 연신공정에서는 심성분과 초성분이 제각기 연신되어 계면간의 박리현상이 일어날 수 있다. 이렇게 되면 초성분이 바깥으로 삐져나와 소정의 열용융온도에서 접착이 안되는 현상이 벌어질 수 있다. 또한 이러한 계면간의 접착력이 불량하여 섬유의 기계적 강도 등의 물성저하를 초래할 수 있다.Adhesion between interfaces has a significant effect on fiber quality in the process of applying tensile and shear tension such as spinning process and stretching process. For example, when interfacial adhesion between ponchos is not good, Slip may occur and single yarn phenomenon may occur, and in the stretching process, core and supercomponents may be respectively stretched to cause peeling between interfaces. In this case, the phenomena of the super ingredient may stick out and the adhesion may not occur at a predetermined heat melting temperature. In addition, the adhesion between these interfaces is poor may lead to a decrease in physical properties such as mechanical strength of the fiber.
종래 상용성이 좋지 않은 두 종류의 폴리머를 사용한 열융착섬유에서 계면간의 접착력을 향상시키기 위한 시도로서 폴리올레핀을 극성기를 갖는 카르복실기, 수산기, 그리시딜기등으로 표면처리하여 폴리에스테르와의 반응을 유도한 기술(특개평9-170116, 특개평 61-201025호)이 제안된 바 있으나, 일부의 경우는, 특히 플라즈마에 의한 그라프트 공중합에 의한 경우에는 플라즈마처리에 따른 폴리머 체인의 절단을 초래시켜 강도저하를 유발하여 연신공정 및 카딩공정시 폴리올레핀의 사절단을 초래하는 문제점이 있는 것이다.In an attempt to improve the adhesion between the interfaces in heat-sealed fibers using two kinds of polymers of poor compatibility, a technique in which a polyolefin is surface treated with a carboxyl group, a hydroxyl group, or a glycidyl group having a polar group to induce a reaction with a polyester. (JP-A 9-170116, Japanese Patent Application Laid-Open No. 61-201025) have been proposed, but in some cases, especially in the case of graft copolymerization by plasma, the polymer chain may be broken by plasma treatment to reduce the strength. Induced by the stretching process and the carding process is a problem that causes the cutting of the polyolefin.
상용성이 좋지 않은 폴리머들로 되는 열융착 복합 섬유의 폴리머 계면간의 접착력 불량에 따른 공정성 및 기계적 물성저하를 방지하여 고품질의 열융착섬유를 제공하는 것을 기술적 과제로 한다.The technical problem is to provide a high-quality heat-sealed fiber by preventing a decrease in fairness and mechanical properties due to poor adhesion between polymer interfaces of the heat-sealed composite fiber made of poorly compatible polymers.
상기한 과제를 해결하기 위하여 본 발명자들은 광범위한 연구를 수행한 결과, 상용성이 좋지 않은 두 성분의 폴리머를 각각의 성분폴리머와 상용성이 좋은물질들을 랜덤이나 블록 또는 그라프트 공중합체 형태로 만들어 방사공정에서 소량 혼합하여 방사시키면 두성분 폴리머간의 계면접착력이 우수한 심초형섬유를 만들 수 있다는 것을 발견하여 본 발명을 완성하게 된 것이다.In order to solve the above problems, the present inventors have conducted extensive research, and found that two-component polymers having poor compatibility with each component polymer were made into random, block, or graft copolymers. The present invention has been completed by discovering that a small amount of mixed and spun in the process can produce a deep sheath type fiber having excellent interfacial adhesion between two component polymers.
그러므로 본 발명에 의하면, 계면에 상용화제가 개재되는 폴리에틸렌테레프탈레이트/폴리에틸렌계 열융착성 복합섬유에 있어서, 상기 상용화제가 폴리에틸렌 블록의 수평균분자량이 2,000∼ 50,000인 폴리에스테르/폴리에틸렌 블록공중합체를 특징으로 하는 열융착성 복합섬유가 제공된다.Therefore, according to the present invention, in a polyethylene terephthalate / polyethylene-based heat sealable composite fiber having a compatibilizer interposed at an interface, the compatibilizer is characterized by a polyester / polyethylene block copolymer having a number average molecular weight of 2,000 to 50,000. Provided is a heat sealable composite fiber.
이하, 본 발명을 보다 상세하게 설명하기로 한다.Hereinafter, the present invention will be described in more detail.
본 발명은 상용성이 낮은 폴리에틸렌테레프탈레이트와 폴리에틸렌으로 되는 열융착성 복합섬유에서 두 폴리머의 상용화제를 사용하여 계면접착력을 향상시키는 것에 관한 것이다.The present invention relates to improving interfacial adhesion by using a compatibilizer of two polymers in a heat-adhesive composite fiber of polyethylene terephthalate and polyethylene having low compatibility.
본 발명의 복합섬유는 상용화제로서 복합되는 두 폴리머와 용해도 파라미터가 비슷한 폴리머가 공중합형태로 된 폴리에스테르/폴리에틸렌 블록공중합체가 사용된다.As the composite fiber of the present invention, a polyester / polyethylene block copolymer is used in which a polymer having a similar solubility parameter and a polymer having a similar solubility parameter is copolymerized.
상용화제로 사용하는 폴리에스테르/폴리에틸렌 블록공중합체는 블록되어 있는 성분폴리머의 분자량에 따라 상용성이 달라지며, 본 발명의 폴리에틸렌테레프탈레이트/폴리올레핀계 열융착성 복합섬유의 경우 상용화제로 사용되는폴리에스테르/폴리에틸렌 블록공중합체는 복합되는 폴리머의 분자량과 유사한 분자량을 가진 블록공중합체가 상용성이 제일 좋다. 특히 바람직한 폴리에스테르/폴리에틸렌 블록공중합체는 폴리에틸렌 블록의 수평균분자량이 2,000-50,000인 것이다. 여기서, 폴리에틸렌 블록의 수평균분자량이 2,000미만의 경우에는 거의 왁스형태로 용융점도가 너무 낮아 혼합시 상용화제의 효과가 적어 계면접착력이 떨어지고, 폴리에틸렌 블록의 수평균분자량이 50,000을 초과하면 상용화제 자체내에서 또 하나의 계면을 형성하게 되어 오히려 계면접착력은 떨어진다.The polyester / polyethylene block copolymer used as a compatibilizer varies depending on the molecular weight of the blocked component polymer, and in the case of the polyethylene terephthalate / polyolefin-based heat sealable composite fiber of the present invention, the polyester / Polyethylene block copolymers are most compatible with block copolymers having a molecular weight similar to that of the polymer to be composited. Particularly preferred polyester / polyethylene block copolymers are those having a number average molecular weight of 2,000-50,000 of polyethylene blocks. Here, when the number average molecular weight of the polyethylene block is less than 2,000, the melt viscosity is almost low in the form of wax, so that the interfacial adhesion is low due to the less effective effect of the compatibilizer upon mixing, and the compatibilizer itself when the number average molecular weight of the polyethylene block exceeds 50,000. Another interface is formed in the surface, and thus the interfacial adhesion is lowered.
본 발명의 폴리에틸렌테레프탈레이트/폴리올레핀계 열융착성 복합섬유에서 상용화제의 함량은 상용화제가 폴리에스테르/폴리에틸렌 블록공중합체 단독인 경우 복합섬유를 구성하는 폴리에틸렌테레프탈레이트 대비 1-5중량부가 적당하다. 여기서, 첨가량이 1중량부미만의 경우에는 상용화제의 효과가 적어 계면접착력이 떨어지고, 첨가량이 5중량부를 초과하면 상용화제 자체내에서 또 하나의 계면을 형성하게 되어 오히려 계면접착력은 떨어진다.The content of the compatibilizer in the polyethylene terephthalate / polyolefin-based heat sealable composite fiber of the present invention is 1-5 parts by weight relative to the polyethylene terephthalate constituting the composite fiber when the compatibilizer is a polyester / polyethylene block copolymer alone. Here, when the added amount is less than 1 part by weight, the effect of the compatibilizer is small and the interfacial adhesive force is lowered. When the added amount is more than 5 parts by weight, another interface is formed in the compatibilizer itself, and the interfacial adhesive force is lowered.
이상 설명한 바와 같은 본 발명의 특징 및 기타의 장점은 후술되는 실시예 및 비교예로부터 보다 명백하게 될 것이다. 단, 본 발명은 하기 실시예로 제한되지 않는다.Features and other advantages of the present invention as described above will become more apparent from the examples and comparative examples described below. However, the present invention is not limited to the following examples.
하기 실시예 및 비교예에서 제시되는 특성들은 다음과 같은 방법으로 측정한 것이다.Properties shown in the following Examples and Comparative Examples are measured by the following method.
* 계면접착성 : 다발의 시료를 에폭시수지를 이용하여 고정시킨후 예리한 나이프로 마이크로토밍하여 금박으로 표면코팅하여 주사전자현미경측정을 하여 계면의 박리현상을 관찰한 것으로, 주사전자현미경(SEM)으로 단면관찰시 계면박리정도 10등급으로 나누어 표시하였으며, 등급이 높을수록 계면접착상태가 양호한 것이다.* Interfacial Adhesion: A bundle of samples were fixed with epoxy resin, microtomized with a sharp knife, surface coated with gold foil, and scanning electron microscopy was performed to observe the peeling phenomenon at the interface. Scanning electron microscopy (SEM) When sectional observation, the interface peeling degree was divided into 10 grades, and the higher the grade, the better the interface bonding state.
*열융착성: 150℃에서 3분간 용융후 융착정도를 10등급으로 나누어 표시하였으며, 등급이 높을수록 열융착성이 양호한 것이다.* Heat sealability: After melting for 3 minutes at 150 ℃, the degree of fusion is divided into 10 grades. The higher the grade, the better the heat sealability.
*카딩성: 부직포 웹을 만들기 위한 공정으로 카딩머신을 통과시킨후의 심초성분의 박리정도를 10등급으로 나누어 표시하였으며, 등급이 높을수록 카딩성이 양호한 것이다.* Carding property: In the process for making nonwoven web, the peeling degree of the sheath component after passing the carding machine is divided into 10 grades, and the higher the grade, the better the carding ability.
<실시예 1><Example 1>
심성분과 초성분이 각각 50대50의 면적비를 가지며 심초의 경계가 원형인 방사노즐을 이용하여(구멍 0.3mm, 구멍수 1800개가 방사상으로 배열됨), 심성분으로서 고유점도가 0.63 dl/g인 폴리에틸렌테레프탈레이트와 초성분으로 용융지수가 18이고, 밀도가 0.960이며, 분자량분포지수가 5인 폴리에틸렌을 사용하고, 상용화제로서는 폴리에틸렌 블록의 수평균분자량이 2000인 폴리에스테르/폴리에틸렌블록공중합체(PET-b-PE)를 심성분인 폴리에스테르 대비 5중량부 첨가하여 심성분 방사노즐로 들어가게하고, 초성분 방사노즐에는 용융지수가 18인 폴리에틸렌이 들어가게 하고, 방사온도 290℃에서 방사속도 1000m/min, 풍량 4kg로 하여 방사한 후, 제1연신온도 75℃, 제2연신온도 80℃에서 연신비 3.5, 친수성유제로 오일처리하면서 연신한후 크림핑공정을 거쳐 크림프수가 12-15정도 갖게하여 섬도가1.4de, 섬유장이51mm가 되도록 커팅한 후, 카딩공정에서 두께 50mm의 웹을 만들어 4m/min의 속도로 움직이는 망상형 컨베이어벨트위에 올려놓고 열융착시키고자 하는 소정의 온도 150℃가 되도록 열풍을 가하였다.The core and supercomponents each have an area ratio of 50 to 50 and use a circular nozzle having a circular border of the core (0.3 mm hole, 1800 holes radially arranged), and the core component has an intrinsic viscosity of 0.63 dl / g. Polyethylene terephthalate and a polyester / polyethylene block copolymer (PET) having a melt index of 18, a density of 0.960, and a molecular weight distribution index of 5 as polyethylene, and a compatibilizer as the number average molecular weight of the polyethylene block of 2000 -b-PE) is added to the core component spinning nozzle by adding 5 parts by weight of the core component polyester, and the poly-component spinning nozzle contains polyethylene having a melt index of 18. The spinning speed is 1000 m / min at a spinning temperature of 290 ° C. , After spinning with a flow rate of 4kg, stretched with an oil ratio of 3.5, a hydrophilic emulsion at a first stretching temperature of 75 ℃, a second stretching temperature of 80 ℃, after the crimping process 1 After cutting to make the fineness of 1.4de and the fiber length to 51mm by 2-15 degree, make a web of 50mm thickness in the carding process and put it on the mesh conveyor belt moving at the speed of 4m / min. Hot air was added so that the temperature might be 150 ° C.
< 실시예 2 ><Example 2>
상용화제로서 폴리에스테르/폴리에틸렌 블록 공중합체중의 폴리에틸렌 블록의 수평균분자량이 20,000인 것을 제외하고는 실시예 1과 동일한 절차를 반복하였다.The same procedure as in Example 1 was repeated except that the number average molecular weight of the polyethylene blocks in the polyester / polyethylene block copolymer as the compatibilizer was 20,000.
< 실시예 3 ><Example 3>
상용화제로서 폴리에스테르/폴리에틸렌 블록 공중합체중의 폴리에틸렌 블록의 수평균분자량이 50,000인 것을 제외하고는 실시예 1과 동일한 절차를 반복하였다.The same procedure as in Example 1 was repeated except that the number average molecular weight of the polyethylene blocks in the polyester / polyethylene block copolymer as the compatibilizer was 50,000.
< 실시예 4 ><Example 4>
상용화제인 폴리에스테르/폴리에틸렌공중합체의 첨가량을 심성분 대비 3중량부로 변경한 것을 제외하고는 실시예 1과 동일한 절차를 반복하였다.The same procedure as in Example 1 was repeated except that the addition amount of the compatibilizer polyester / polyethylene copolymer was changed to 3 parts by weight relative to the core component.
< 실시예 5 ><Example 5>
상용화제인 폴리에스테르/폴리에틸렌공중합체의 첨가량을 심성분 대비 1중량부로 변경한 것을 제외하고는 실시예 1과 동일한 절차를 반복하였다.The same procedure as in Example 1 was repeated except that the addition amount of the compatibilizer polyester / polyethylene copolymer was changed to 1 part by weight relative to the core component.
< 비교예 1 ><Comparative Example 1>
상용화제를 사용하지 않은 것을 실시예 1과 동일한 절차를 반복하였다.The same procedure as in Example 1 was repeated without using a compatibilizer.
< 비교예 2 ><Comparative Example 2>
상용화제로서 폴리에스테르/폴리에틸렌 블록 공중합체중의 폴리에틸렌 블록의 수평균분자량이 70,000인 것을 제외하고는 실시예 1과 동일한 절차를 반복하였다.The same procedure as in Example 1 was repeated except that the number average molecular weight of the polyethylene blocks in the polyester / polyethylene block copolymer as the compatibilizer was 70,000.
< 비교예 3 ><Comparative Example 3>
상용화제인 폴리에스테르/폴리에틸렌공중합체의 첨가량을 심성분 대비 10중량부로 변경한 것을 제외하고는 실시예 1과 동일한 절차를 반복하였다.The same procedure as in Example 1 was repeated except that the amount of the compatibilizer polyester / polyethylene copolymer was changed to 10 parts by weight relative to the core component.
상기 실시예 및 비교예에 의거하여 얻은 복합섬유의 심성분과 초성분의 계면간 박리성과, 열융착성 및 카딩성을 측정하였다. 그 결과는 표1에 제시된다.The interfacial peelability, heat sealability and carding properties of the core component and the sheath component of the composite fiber obtained according to the above Examples and Comparative Examples were measured. The results are shown in Table 1.
상기한 표 1의 결과로부터 명백하게 되는 바와 같이 본 발명에 따라 상용화제를 상용성이 낮은 두 폴리머 사이의 계면에 개재하게 되면 계면접착력이 매우 우수하고, 열융착성 및 카딩성이 우수한 고품질의 열융착성 복합섬유를 제조할 수 있게 된다.As will be apparent from the results of Table 1 above, when the compatibilizer is interposed between two polymers having low compatibility, the interfacial adhesive force is very high, and the thermal bonding and carding properties are high quality. It is possible to produce a sex composite fiber.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020020044682AKR20040011207A (en) | 2002-07-29 | 2002-07-29 | Thermally bondable polyterephthalate/polyethylene composite fiber with high interfacial adhesive strength |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020020044682AKR20040011207A (en) | 2002-07-29 | 2002-07-29 | Thermally bondable polyterephthalate/polyethylene composite fiber with high interfacial adhesive strength |
| Publication Number | Publication Date |
|---|---|
| KR20040011207Atrue KR20040011207A (en) | 2004-02-05 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020020044682ACeasedKR20040011207A (en) | 2002-07-29 | 2002-07-29 | Thermally bondable polyterephthalate/polyethylene composite fiber with high interfacial adhesive strength |
| Country | Link |
|---|---|
| KR (1) | KR20040011207A (en) |
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|---|---|---|---|---|
| KR100826687B1 (en)* | 2004-03-31 | 2008-04-30 | 인텔 코포레이션 | Advanced switching fabric discovery protocol |
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| JPH04202457A (en)* | 1990-11-30 | 1992-07-23 | Tonen Corp | Polyester resin composition |
| KR930006198A (en)* | 1991-09-10 | 1993-04-21 | 김상응 | Process for producing high strength polyester monofilament with excellent processability |
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| KR100826687B1 (en)* | 2004-03-31 | 2008-04-30 | 인텔 코포레이션 | Advanced switching fabric discovery protocol |
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