KR101208186B1 - High Transparent Polypropylene Resin for Protection Film - Google Patents
High Transparent Polypropylene Resin for Protection Film Download PDFInfo
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- KR101208186B1 KR101208186B1 KR1020100104716A KR20100104716A KR101208186B1 KR 101208186 B1 KR101208186 B1 KR 101208186B1 KR 1020100104716 A KR1020100104716 A KR 1020100104716A KR 20100104716 A KR20100104716 A KR 20100104716A KR 101208186 B1 KR101208186 B1 KR 101208186B1
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- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
- C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
- C08F297/083—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins the monomers being ethylene or propylene
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
본 발명은 보호필름용 폴리프로필렌 수지에 관한 것으로, 보다 구체적으로, 에틸렌 프로필렌 블록공중합체를 포함하고, 상기 에틸렌 프로필렌 블록공중합체에서 프로필렌 단독중합체 고유점도에 대한 용제추출고무성분의 고유점도 비율이 1.0~1.7이며, 상기 용제추출고무성분에서 에틸렌 함량이 30~40중량%인 보호필름용 폴리프로필렌 수지에 관한 것이다.
본 발명에 의한 보호필름용 폴리프로필렌 수지는 필름 제막시 외관상 Fish-eye (또는 gel, lens)가 극히 적고 우수한 투명성을 제공할 수 있다.The present invention relates to a polypropylene resin for a protective film, more specifically, comprising an ethylene propylene block copolymer, the ratio of the intrinsic viscosity of the solvent extraction rubber component to the intrinsic viscosity of the propylene homopolymer in the ethylene propylene block copolymer is 1.0 It is ˜1.7, and relates to a protective film polypropylene resin having an ethylene content of 30 to 40% by weight in the solvent extraction rubber component.
The polypropylene resin for protective film according to the present invention can provide excellent transparency with very little fish-eye (or gel, lens) in appearance when film forming.
Description
본 발명은 고도의 정밀도를 요구하는 전자제품에 적용할 수 있는 보호필름용 폴리프로필렌 수지에 관한 것이다.
The present invention relates to a polypropylene resin for a protective film that can be applied to electronic products that require a high degree of precision.
전자 제품의 부품으로 사용되는 다양한 종류의 광학 필름은 서로 다른 업체에서 만들어져 한곳에서 조립되기 때문에 이동 시 오염의 위험이 크다. 이러한 오염을 방지하기 위해 보호필름이 사용되며, 보호필름 자체가 조립 전 단계까지만 사용되는 일회용이긴 하나, 보호필름이 붙어있는 상태에서 광학필름의 표면 검사를 실시하기 때문에 보호필름 자체의 결함이 광학 필름의 결함으로 인지될 가능성이 있어서 Fish-eye와 같은 결함이 없는 것이 보호필름의 중요한 요구특성이 된다. 또한 광학필름은 빛을 내는 정도에 대한 검사도 실시하기 때문에 보호필름이 투명하지 않으면 정확한 검사를 할 수 없다. The various types of optical films used as components of electronic products are made by different companies and assembled in one place, so there is a high risk of contamination when moving. In order to prevent such contamination, the protective film is used, and the protective film itself is a single-use only for the pre-assembly stage, but the defect of the protective film itself is caused by the surface inspection of the optical film while the protective film is attached. Since there is a possibility of being recognized as a defect of, the absence of a defect such as fish-eye is an important requirement of the protective film. In addition, since the optical film is also inspected for the degree of light shining, accurate inspection cannot be performed unless the protective film is transparent.
이렇기 때문에 전자 제품 및 광학 필름용 보호필름에서 가장 요구되는 특성은 Fish-eye를 줄이는 것과 투명성이다. For this reason, the most demanding characteristics of protective films for electronic products and optical films are the reduction of fish-eye and transparency.
이러한 Fish-eye는 수지 가공 과정에서 열화로 인한 가교 및 산화 등에 의해서 발생할 수 있다. 특히 폴리에틸렌의 경우는 가교로 인해 미세한 크기의 Fish-eye가 많이 발생하게 된다. 이런 측면에서 폴리프로필렌은 수지 특성상 가교가 되지 않아 유리하지만 폴리프로필렌 중 에틸렌 프로필렌 공중합 수지의 경우에는 고무성분이 가교되어 Fish-eye로 발현될 수 있다. 최근 보호필름이 부착된 상태로 후가공이 진행되는 경우가 많아 폴리프로필렌 수지를 보호필름으로 사용하고자 하는 경우에는 대부분 에틸렌 프로필렌 공중합 수지가 요구된다. 그렇기 때문에 폴리프로필렌을 보호필름용도로 사용하고자 할 경우에는 고무성분의 가교로 인한 Fish-eye 발생을 줄이기 위한 에틸렌 프로필렌 공중합 수지의 고무 조성의 조절이 중요하다.Such fish-eye may occur due to crosslinking and oxidation due to deterioration in resin processing. In the case of polyethylene in particular, a lot of fine-size fish-eye occurs due to crosslinking. In this respect, polypropylene is advantageous because it is not crosslinked in terms of resin properties, but in the case of ethylene propylene copolymer resin among polypropylenes, rubber components may be crosslinked and expressed as fish-eye. In recent years, post-processing is often performed with a protective film attached, and in order to use a polypropylene resin as a protective film, an ethylene propylene copolymer resin is required in most cases. Therefore, when the polypropylene is to be used as a protective film, it is important to control the rubber composition of the ethylene propylene copolymer resin to reduce the fish-eye occurrence due to the crosslinking of the rubber component.
또한, 투명성을 높이기 위해서는 고무의 크기를 작게 하여 투명성을 높일 수 있다. 고무의 크기가 작을수록 빛이 통과하는 데에 방해를 받는 부분이 적게 되는 것이므로 투명성이 향상된다. In addition, in order to increase the transparency, the size of the rubber can be reduced to increase the transparency. The smaller the size of the rubber, the less interference there is in the light passing through it, which improves transparency.
하지만, 고도의 정밀도를 요구하는 전자 제품 및 광학 필름에 적용하기 위해서 Fish-eye의 발생이 적으면서 동시에, 고투명성을 가진 수지를 제공하기에는 기술적으로 어려움이 남아 있다.
However, there is a technical difficulty to provide a resin having high transparency while generating less fish-eye for application to electronic products and optical films requiring high precision.
상기 문제점을 해결하기 위한 본 발명의 목적은, 고도의 정밀도를 요구하는 전자 제품 및 광학 필름의 보호필름에 적합하도록 Fish-eye의 발생이 극히 적고 투명성이 우수할 뿐 만 아니라 내열성 및 절단성이 우수한 보호필름용 폴리프로필렌 수지를 제공하는 것이다.
An object of the present invention for solving the above problems is that the occurrence of fish-eye is extremely small and excellent in transparency as well as excellent in heat resistance and cutability to be suitable for the protective film of electronic products and optical films that require high precision. It is to provide a polypropylene resin for a protective film.
상기 목적을 달성하기 위한 본 발명의 양상은, According to an aspect of the present invention,
에틸렌 프로필렌 블록공중합체를 포함하는 보호필름용 폴리프로필렌 수지에 있어서, 상기 에틸렌 프로필렌 블록공중합체는 프로필렌 단독중합체와 에틸렌 프로필렌 공중합체가 단계적으로 공중합된 것이고, 상기 에틸렌 프로필렌 블록공중합체에서 프로필렌 단독중합체 고유점도에 대한 용제추출고무성분의 고유점도 비율이 1.0~1.7이며, 상기 용제추출고무성분에서 에틸렌 함량이 30~40중량%인 보호필름용 폴리프로필렌 수지에 관한 것이다.
In a polypropylene resin for a protective film comprising an ethylene propylene block copolymer, the ethylene propylene block copolymer is a stepwise copolymerization of a propylene homopolymer and an ethylene propylene copolymer, and is unique to the propylene homopolymer in the ethylene propylene block copolymer. The intrinsic viscosity ratio of the solvent extraction rubber component to the viscosity is 1.0 to 1.7, and relates to a polypropylene resin for a protective film having an ethylene content of 30 to 40% by weight of the solvent extraction rubber component.
상기 에틸렌 프로필렌 블록공중합체의 용융지수가 1~10g/10분 일 수 있다.
Melt index of the ethylene propylene block copolymer may be 1 ~ 10g / 10 minutes.
상기 에틸렌 프로필렌 블록공중합체에서 에틸렌 프로필렌 공중합체의 함량은 용제추출고무성분 함량을 기준으로 5~15중량%일 수 있다.
The content of the ethylene propylene copolymer in the ethylene propylene block copolymer may be 5 to 15% by weight based on the content of the solvent extraction rubber component.
본 발명에 의한 보호필름용 폴리프로필렌 수지는 Fish-eye의 발생이 극히 적고, 고투명성을 나타내고 있어 전자 제품 및 광학 필름의 표면을 보호하기 위한 보호필름 제막 용도로 적합할 뿐만 아니라 내열성 및 절단성이 우수한 보호필름을 제공할 수 있다.
The polypropylene resin for protective films according to the present invention has extremely low occurrence of fish-eye and exhibits high transparency, which is not only suitable for forming a protective film for protecting the surface of electronic products and optical films, but also for heat resistance and cutting properties. Excellent protective film can be provided.
이하, 본 발명에 관하여 보다 상세하게 설명한다.
Hereinafter, the present invention will be described in more detail.
본 발명은 보호필름용 폴리프로필렌 수지에 관한 것이다.The present invention relates to a polypropylene resin for a protective film.
상기 보호필름용 폴리프로필렌 수지는 Fish-eye의 발생이 적고 고투명성을 가진 필름을 제공할 수 있다.The polypropylene resin for the protective film may provide a film with less occurrence of fish-eye and high transparency.
상기 보호필름용 폴리프로필렌 수지는 프로필렌 단독중합체와 에틸렌 프로필렌 공중합체가 반응기 내에서 단계적으로 중합된 에틸렌 프로필렌 블록공중합체를 포함한다.
The polypropylene resin for the protective film includes an ethylene propylene block copolymer in which a propylene homopolymer and an ethylene propylene copolymer are polymerized step by step in a reactor.
상기 에틸렌 프로필렌 블록공중합체의 용융지수(ASTM D 1238)는 1~10g/10분이고, 더 바람직하게는 3~8g/10분이다. 용융지수가 1g/10분 미만일 때는 필름 제막시 압출시 부하가 상승하고 수지의 유동성이 떨어져 원하는 생산성을 얻기 어렵고, 10g/10분 이상일 때는 다이에서 토출되는 용융 수지의 점도가 낮아져 필름의 두께 균일성이 악화되고, 필름 성형이 용이하지 않을 수 있다.
The melt index (ASTM D 1238) of the ethylene propylene block copolymer is 1 to 10 g / 10 minutes, more preferably 3 to 8 g / 10 minutes. If the melt index is less than 1g / 10min, the load increases during extrusion during film formation and the fluidity of the resin is low to obtain desired productivity.If the melt index is 10g / 10min or more, the viscosity of the molten resin discharged from the die becomes low, resulting in uniform film thickness. This deteriorates and film forming may not be easy.
상기 에틸렌 프로필렌 블록공중합체에 있어서 에틸렌 프로필렌 공중합체의 함량은 용제추출고무성분 함량을 기준으로 5~15중량% 이다. 상기 용제추출고무성분 함량이 5중량% 미만일 때는 낮은 고무 함량으로 인해 필름 표면의 요철이 적어지기 때문에 충분한 내블록킹성을 얻을 수 없으며, 15중량%를 초과할 경우에는 압출기 내부의 용융영역에서 고무상 고분자 사슬간의 얽힘(entanglement)에 의해 Fish-eye가 증가하게 되고 또한 필름 표면의 요철이 증가하지만 연질의 끈적한(sticky) 고무상에 의해 필름의 언윈딩(unwinding)시 점착층과의 이형이 어려워질 수 있다.
In the ethylene propylene block copolymer, the content of the ethylene propylene copolymer is 5 to 15% by weight based on the content of the solvent extraction rubber component. When the solvent extraction rubber content is less than 5% by weight, sufficient blocking resistance cannot be obtained because the unevenness of the film surface is reduced due to the low rubber content, and when the solvent extraction rubber content exceeds 15% by weight, a rubbery phase is formed in the molten region inside the extruder. The entanglement between the polymer chains increases fish-eye and the unevenness of the film surface increases, but the soft sticky rubber phase makes it difficult to release the adhesive layer when unwinding the film. Can be.
상기 에틸렌 프로필렌 블록공중합체에 있어서 프로필렌 단독중합체의 고유점도에 대한 용제추출고무성분의 고유점도 비율은 1.0~1.7이다. 상기 비율이 상기 범위를 벗어날 시에는 프로필렌 단독중합체와 용제추출고무 사이의 혼화성(miscibility)이 떨어져서 고무상이 서로 얽히거나 뭉치는 경우가 발생되고, 그 결과 필름의 표면에 Fish-eye로 나타날 수 있다.
In the ethylene propylene block copolymer, the intrinsic viscosity ratio of the solvent extraction rubber component to the intrinsic viscosity of the propylene homopolymer is 1.0 to 1.7. When the ratio is out of the above range, the miscibility between the propylene homopolymer and the solvent extraction rubber is reduced, so that the rubber phases may be entangled or agglomerated with each other, resulting in fish-eye on the surface of the film. .
상기 에틸렌 프로필렌 블록공중합체에서 용제추출고무성분의 에틸렌 함량은 30~40중량%이다. 상기 용제추출고무성분의 에틸렌 함량이 40중량%를 넘어가면 고무상의 크기가 커져서 필름 제막시 투명성이 떨어지게 된다. 또한 에틸렌이 많이 중합된 고무성분은 프로필렌 단독중합체와의 상용성이 낮아져 고무상 고분자 사슬간의 뭉침(agglomeration)과 얽힘이 쉽게 발생하게 되어 필름에서 Fish-eye의 발생을 증가시킬 수 있다.
The ethylene content of the solvent extraction rubber component in the ethylene propylene block copolymer is 30 to 40% by weight. When the ethylene content of the solvent extraction rubber component exceeds 40% by weight, the size of the rubbery phase increases, resulting in inferior transparency during film formation. In addition, the ethylene-polymerized rubber component has a low compatibility with the propylene homopolymer, so that agglomeration and entanglement between rubbery polymer chains easily occur, thereby increasing the occurrence of fish-eye in the film.
이하 본 발명을 실시예를 통하여 보다 상세하게 설명한다. 그러나, 이들 실시예는 본 발명을 예시적으로 설명하기 위한 것으로, 본 발명의 범위가 이들 실시예에 한정되는 것은 아니다.
Hereinafter, the present invention will be described in more detail with reference to examples. However, these examples are for illustrative purposes only, and the scope of the present invention is not limited to these examples.
실시예Example 1~3 및 1-3 and 비교예Comparative example 1~3 1-3
표 1에 나타낸 실시예 및 비교예는 에틸렌 프로필렌 블록공중합체 수지를 이용하여 제막한 제품으로, 통상의 T-다이 캐스팅 방식을 사용하여 두께 0.04mm의 필름을 제막하였다. T-다이 캐스팅 방식 이외에 블로운 필름, 이축연신 필름 등 통상의 필름 방식에 있어서도 동일한 결과가 얻어진다.
The Example and comparative example shown in Table 1 were the products formed into a film using the ethylene propylene block copolymer resin, and the film of thickness 0.04mm was formed using the conventional T-die casting method. In addition to the T-die casting method, the same result is obtained also in a conventional film system such as a blown film and a biaxially stretched film.
실험예Experimental Example
실시예와 비교예에 있어서의 특성의 측정은 하기의 방법 및 기준으로 행하였다.
The measurement of the characteristic in an Example and a comparative example was performed with the following method and reference | standard.
물성측정방법Property measurement method
(1) 용제추출고무성분 함량(1) Solvent Extraction Rubber Content
에틸렌 프로필렌 고무 중 무정형 부분으로 자일렌(Xylene) 용제 추출법을 이용하여 측정하였다.
The amorphous part of ethylene propylene rubber was measured by using a xylene solvent extraction method.
(2) 용제추출고무성분 내 에틸렌 함량((2) Ethylene Content in Solvent Extraction Rubber Component ( ethyleneethylene propylenepropylene rubberrubber ethylene, 중량%) ethylene, weight%)
에틸렌 프로필렌 블록공중합체 수지의 자일렌 용제 추출분의 에틸렌 분율로서, 적외선 흡수 스펙트럼을 이용하여 720, 740cm-1의 특성 피크를 이용하여 에틸렌 함량을 측정하였다.
As the ethylene fraction of the xylene solvent extract of ethylene propylene block copolymer resin, the ethylene content was measured using the characteristic peak of 720,740 cm <-1> using the infrared absorption spectrum.
(3) (3) 고유점도Intrinsic viscosity (( dldl /g) / g)
상기 자일렌 추출물에 대해 데칼린 135℃ 에서 RIGO AUTO VISCOSIMETER를 이용하여 측정하였다.
The xylene extract was measured using RIGO AUTO VISCOSIMETER at decalin 135 ° C.
(4) 용융 지수((4) melt index ( MeltMelt indexindex ))
ASTM D 1238 조건에 따라 230℃, 2.16kg의 조건에서 측정하였다.
According to ASTM D 1238 conditions were measured at 230 ℃, 2.16kg conditions.
(5) 흐림도(5) blur
ASTM D 1003 조건에 따라 흐림도를 측정하였다.
Cloudiness was measured according to ASTM D 1003 conditions.
(6) (6) FishFish -- eyeeye
필름 성형 후 광학 Fish-eye 카운터(Futec Max eye C)로 개수를 측정하여 단위면적당 발생 개수로 환산하여 기재하였다. 원형이 아닌 타원형의 Fish-eye는 장축을 기준으로 크기를 측정하였다. 측정은 ㎡ 면적을 3회 측정한 평균이다.After molding the film, the number was measured using an optical fish-eye counter (Futec Max eye C), and the number was calculated in terms of generation per unit area. The oval, non-circular fish-eye was measured based on its long axis. The measurement is an average of measuring the m 2 area three times.
g/10분Melt Index,
g / 10 min
(1) 프로필렌 단독중합체 고유점도에 대한 용제추출고무성분 고유점도의 비율
(1) Ratio of solvent extraction rubber component intrinsic viscosity to propylene homopolymer intrinsic viscosity
표 1을 살펴보면, 실시예 1 내지 3은 흐림도가 낮고, Fish-eye의 발생 개수가 적은 것을 확인할 수 있다. 비교예 1은 투명성은 우수하지만 프로필렌 단독중합체의 고유점도에 대한 용제추출고무성분의 고유점도 비율이 낮아 Fish-eye의 발생이 증가된 것을 확인할 수 있다. 비교예 2는 용제추출고무성분의 에틸렌 함량이 많아서 흐림도가 높고, Fish-eye의 발생이 많다. 비교예 3은 흐림도는 낮지만 프로필렌 단독중합체의 고유점도와 용제추출고무성분의 고유점도 비율이 높아서 Fish-eye의 발생이 증가된 것을 확인할 수 있다.Looking at Table 1, it can be seen that Examples 1 to 3 have a low cloudiness and a low number of occurrences of fish-eye. Comparative Example 1 is excellent in transparency, but the low intrinsic viscosity ratio of the solvent extraction rubber component to the intrinsic viscosity of the propylene homopolymer can be seen that the occurrence of fish-eye increased. Comparative Example 2 has a high ethylene content of the solvent extraction rubber component, high cloudiness, and a lot of occurrence of fish-eye. In Comparative Example 3, although the cloudiness is low, the intrinsic viscosity ratio of the propylene homopolymer and the intrinsic viscosity ratio of the solvent extraction rubber component can be confirmed to increase the occurrence of fish-eye.
본 발명에 의한 보호필름용 폴리프로필렌 수지는 필름 제막시 외관상 Fish-eye (또는 gel, lens)의 발생이 적고, 투명성이 우수하여 고정밀도가 요구되는 전자 제품의 표면 보호필름용으로 효과적으로 적용할 수 있다.The polypropylene resin for protective film according to the present invention can be effectively applied for the surface protection film of electronic products requiring high precision due to the low occurrence of fish-eye (or gel, lens) in appearance and excellent transparency during film formation. have.
Claims (3)
상기 에틸렌 프로필렌 블록공중합체가 프로필렌 단독중합체와 에틸렌 프로필렌 공중합체가 단계적으로 공중합된 것이고,
상기 에틸렌 프로필렌 블록공중합체에서 프로필렌 단독중합체 고유점도에 대한 자일렌 추출법을 이용한 용제추출고무성분의 고유점도 비율이 1.0~1.7이며,
상기 용제추출고무성분에서 에틸렌 함량이 30~40중량%인 것을 특징으로 하는 보호필름용 폴리프로필렌 수지.In the polypropylene resin for protective film containing an ethylene propylene block copolymer,
The ethylene propylene block copolymer is a copolymer of propylene homopolymer and ethylene propylene copolymer in stages,
Intrinsic viscosity ratio of the solvent extraction rubber component using the xylene extraction method to the intrinsic viscosity of propylene homopolymer in the ethylene propylene block copolymer is 1.0 ~ 1.7,
Polypropylene resin for a protective film, characterized in that the ethylene content in the solvent extraction rubber component 30 to 40% by weight.
상기 에틸렌 프로필렌 블록공중합체의 용융지수가 1~10g/10분(230℃, 2.16kg)인 것을 특징으로 하는 보호필름용 폴리프로필렌 수지.The method of claim 1,
Polypropylene resin for protective film, characterized in that the melt index of the ethylene propylene block copolymer is 1 ~ 10g / 10 minutes (230 ℃, 2.16kg).
상기 에틸렌 프로필렌 블록공중합체의 에틸렌 프로필렌 공중합체의 함량은 용제추출고무성분 함량을 기준으로 5~15중량%인 것을 특징으로 하는 보호필름용 폴리프로필렌 수지.The method of claim 1,
The content of the ethylene propylene copolymer of the ethylene propylene block copolymer is a polypropylene resin for protective film, characterized in that 5 to 15% by weight based on the content of the solvent extraction rubber component.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100295028B1 (en) | 1992-09-16 | 2001-09-17 | 고오사이 아끼오 | Polypropylene Block Copolymer and Films thereof |
| KR100574287B1 (en) | 1998-12-30 | 2006-08-03 | 삼성토탈 주식회사 | Polypropylene resin composition excellent in rigidity and impact resistance |
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| KR100295028B1 (en) | 1992-09-16 | 2001-09-17 | 고오사이 아끼오 | Polypropylene Block Copolymer and Films thereof |
| KR100574287B1 (en) | 1998-12-30 | 2006-08-03 | 삼성토탈 주식회사 | Polypropylene resin composition excellent in rigidity and impact resistance |
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