KR100584950B1 - Bio-destructive LLDPE composition and film thereof - Google Patents
Bio-destructive LLDPE composition and film thereof Download PDFInfo
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Abstract
본 발명은 1) 전분과 폴리카프로락톤을 포함하고 있는 생분해성 마스터뱃치 30 내지 50wt%, 2) 용융지수가 0.5∼2.0g/10분이고, 밀도가 0.920∼0.930g/cc이며, 분자량 분포를 나타내는 스트레스 익스포넨샬(Stress Exponetial)이 1.23∼1.40인 공단량체로서 탄소원자수가 4개 이상인 알파-올레핀을 포함하는 선형저밀도 폴리에틸렌 (LLDPE)수지 50∼70wt%, 3) 상기 성분 1) 및 2)의 혼합성분 100중량부에 대하여 용융지수가 2.0∼15g/10분이고, 밀도가 0.915∼0.920g/cc이며, 분자량 분포를 나타내는 가스크로마토그래프 상에서 바이모달리티의 특성을 나타내는 고압저밀도 폴리에틸렌 수지 5∼30중량부, 및 4) 상기 1) 및 2)의 혼합성분 100중량부에 대하여 용융지수가 0.5∼5g/10분이고, 밀도가 0.925∼0.940g/cc이며, 초산비닐공중합체의 양이 5∼20wt%인 에틸렌 초산비닐 공중합 수지 0∼15중량부로 구성되는 생붕괴성 선형저밀도 폴리에틸렌 조성물 및 이의 필름에 관한 것이다. 상기 필름은 물성중 충격강도, 인열강도(초기찢김성 및 진행찢김성)가 향상되어 질기며, 항복점 인장강도, 굴곡강도 및 슬립성능이 우수하여 필름의 후가공에도 뛰어난 가공성능을 나타낸다.The present invention relates to a biodegradable masterbatch containing 1) starch and polycaprolactone 30-50 wt%, 2) a melt index of 0.5-2.0 g / 10 min, a density of 0.920-0.930 g / cc, and a molecular weight distribution. 50-70 wt% of linear low density polyethylene (LLDPE) resins containing alpha-olefins having 4 or more carbon atoms as a comonomer having a stress exponential of 1.23 to 1.40, 3) of the components 1) and 2) 5 to 30 parts by weight of a high pressure low density polyethylene resin having a bimodality characteristic on a gas chromatograph having a melt index of 2.0 to 15 g / 10 minutes, a density of 0.915 to 0.920 g / cc, and a molecular weight distribution based on 100 parts by weight of the mixed component. And 4) a melt index of 0.5 to 5 g / 10 minutes, a density of 0.925 to 0.940 g / cc, and an amount of vinyl acetate copolymer of 5 to 20 wt%, based on 100 parts by weight of the mixed components of 1) and 2). 0 to 15 parts by weight of ethylene vinyl acetate copolymer resin The present invention relates to a biodegradable linear low density polyethylene composition and a film thereof. The film has improved impact strength, tearing strength (initial tearing property and tearing property) among physical properties, and has excellent yield point tensile strength, bending strength and slip performance, and thus shows excellent processing performance in post-processing of the film.
생붕괴성, 선형저밀도, 폴리에틸렌, 필름, 생분해성Biodegradable, Linear Low Density, Polyethylene, Film, Biodegradable
Description
도 1은 기존의 선형저밀도 폴리에틸렌 조성물을 이용하여 성형시 가공성을 나타낸 사진이고,1 is a photograph showing workability during molding using a conventional linear low density polyethylene composition,
도 2는 본 발명에 따른 선형저밀도 폴리에틸렌 조성물을 이용하여 성형시 가공성을 나타낸 사진이며,Figure 2 is a photograph showing the processability during molding using a linear low density polyethylene composition according to the present invention,
도 3은 기존의 선형저밀도 폴리에틸렌 조성물을 이용하여 성형시 외관 및 다이드룰(다이똥) 현상을 나타낸 사진이다.Figure 3 is a photograph showing the appearance and die-dull (dietung) phenomenon during molding using a conventional linear low density polyethylene composition.
본 발명은 생붕괴성 선형저밀도 폴리에틸렌 조성물 및 이의 필름에 관한 것으로, 좀 더 구체적으로는 붕괴성 필름의 가공성, 물성 및 2차 가공성에 뛰어난 특성을 나타내는 폴리에틸렌 수지 조성물 및 이의 필름에 관한 것이다.The present invention relates to a biodegradable linear low density polyethylene composition and a film thereof, and more particularly, to a polyethylene resin composition and a film thereof exhibiting excellent properties in processability, physical properties and secondary processability of the collapsible film.
최근 환경에 대한 관심이 급증하면서 1회용품 사용의 규제, 폐합성수지의 감량화정책 추진, 쓰레기 종량제 봉투의 생분해성 수지 사용 등을 민관이 합동으로 추진 중에 있다. 특히, 쓰레기 봉투의 경우, 100% 매립되는 것으로 쓰레기 봉투에 담겨진 생활쓰레기에 의한 침출수 등을 효과적으로 관리하기 위해서는 적정 기간내에 쓰레기 봉투가 분해되어야 한다.With the recent surge in environmental concerns, public-private governments have jointly promoted the regulation of the use of disposable products, the reduction of waste synthetic resins, and the use of biodegradable resins for waste-based bags. In particular, in the case of garbage bags, 100% of landfills must be dismantled within an appropriate period in order to effectively manage the leachate caused by household waste contained in the garbage bags.
생분해성 또는 생붕괴성 쓰레기 봉투에 관련된 선행기술을 살펴보면, 한국 특허출원 제97-704696호에서는 특정한 트랜스-중합체 및 이들과 다른 생분해성 성분과의 블렌드로 제조된 생분해성 제품을 개시하고 있고, 한국 특허출원 제98-033834호, 제98-033835호, 제98-033836호 및 제98-033837호에서는 폴리에스테르 수지 조성물 및 그 제조방법을 개시하고 있으며, 특히 종래의 지방족 폴리에스테르에 있어서 인열강도 부족으로 인하여 발생했던 쓰레기봉투나 쇼핑백 등으로의 실용화에 대한 어려움을 해소한 폴리에스테르 수지 조성물 및 그 제조방법을 제안하고 있다. 또한, 한국 특허출원 제95-023910에서는 폴리프로필렌과 생분해성 수지의 혼합에 의해 제조되는 생붕괴성을 갖는 폴리프로필렌을 개시하고 있다.Looking at the prior art related to biodegradable or biodegradable garbage bags, Korean Patent Application No. 97-704696 discloses biodegradable products made from specific trans-polymers and blends of these and other biodegradable components, and Korea Patent Application Nos. 98-033834, 98-033835, 98-033836 and 98-033837 disclose polyester resin compositions and methods for their preparation, in particular tear strength in conventional aliphatic polyesters. The present invention proposes a polyester resin composition and a method of manufacturing the same, which solves the difficulties in practical use such as garbage bags or shopping bags. In addition, Korean Patent Application No. 95-023910 discloses a biodegradable polypropylene produced by mixing a polypropylene and a biodegradable resin.
그러나, 상기 특허들에서 언급된 기술들은 현재 적용되고 있지 않으며, 현재 사용하고 있는 종량제 쓰레기 봉투는 대부분 고밀도 폴리에틸렌(HDPE)이나 선형저밀도폴리에틸렌(LLDPE)으로서 분해되는 데는 수백년의 시간를 요구된다. 따라서, 이러한 문제점을 해결하는 방법 중의 하나로 환경부에서는 생분해성 수지가 30%이상 함유되어 있는 생붕괴성 선형저밀도 폴리에틸렌(LLDPE) 필름을 사용할 것을 지방자치단체에 권장하고 있다.However, the techniques mentioned in the above patents are not currently applied, and the currently used pay-as-you-go garbage bags mostly require hundreds of years to decompose as high density polyethylene (HDPE) or linear low density polyethylene (LLDPE). Therefore, the Ministry of Environment recommends the local government to use a biodegradable linear low density polyethylene (LLDPE) film containing 30% or more biodegradable resin as one of the methods to solve this problem.
생분해성 수지의 경우 전분과 폴리카프로락톤을 주성분으로 구성되어 있어 기존의 LLDPE나 HDPE를 사용했을 때 탄화물과 연기가 과량 발생하고 필름물성이 약화되어 쓰레기 봉투로서 상품가치를 상실하게 되는 경우가 자주 발생한다. 또한, 폴리에틸렌을 기존의 블로운 필름 성형기기에 사용하였을 경우, 필름성형중 압출기의 스크류에서 자체적으로 발생하는 마찰열에 의하여 블로운 필름의 버블이 불안정하여 필름의 두께 및 치수가 불량하게 되어 압출량을 기존 필름성형시 보다 약 50% 감소시켜야 한다. 즉, 생산성이 약 50%로 감소되는 결과를 초래하고 있다. 또한, 필름성형중 다이 부분에 다이드룰이 과량 형성되어 블로운 필름의 버블을 터트리거나 그 버블에 묻어나와 필름의 후가공시 접착과정에 문제를 야기하는 경우가 있다.Biodegradable resins are composed of starch and polycaprolactone as the main components, and when LLDPE or HDPE is used, excessive carbides and smoke are generated and film properties are weakened, resulting in the loss of commodity value as garbage bags. do. In addition, when polyethylene is used in a conventional blown film forming machine, the bubble of the blown film becomes unstable due to frictional heat generated by the screw of the extruder during film forming, resulting in poor thickness and dimensions of the extruded film. It should be reduced by about 50% than existing film forming. In other words, the productivity is reduced to about 50%. In addition, an excessive die die may be formed in the die portion during film forming, and may cause bubbles in the blown film to be buried or buried in the bubble, thereby causing problems in the adhesion process during post-processing of the film.
이와 같은 문제점을 해결하는 방법은 기계적인 측면에서 스크류와 다이부분을 개조하여 융융된 고분자가 자체적인 마찰열 발생을 최소화하는 방법이 있고, 단독의 LLDPE를 사용 할 경우, 가공성 향상을 위하여 LLDPE의 분자량분포를 확대하여 LLDPE에 함유된 저분자가 가공성을 향상시키고 고분자성분이 용융상태의 용융강도를 향상시키어 블로운필름 버블을 안정화하는 방법이 있으나 이와 같은 방법은 제조공정을 개선하거나 촉매기술을 개발해야하는 어려움이 있다.In order to solve this problem, there is a method of minimizing the friction heat generated by the molten polymer by modifying the screw and the die part in the mechanical aspect. When using the LLDPE alone, the molecular weight distribution of the LLDPE is improved to improve processability. The low molecular weight contained in the LLDPE improves the processability and the polymer component improves the melt strength in the molten state to stabilize the blown film bubble.However, such a method has difficulty in improving the manufacturing process or developing the catalyst technology. have.
이에, 본 발명에서는 상술한 방법보다 노력과 비용면에서 쉽게 접근할 수 있는 고분자 블렌드 방법을 이용하여 상기 문제점을 해결할 수 있었고, 본 발명은 이에 기초하여 완성되었다.Thus, the present invention was able to solve the above problems by using a polymer blend method which is more easily accessible in terms of effort and cost than the above-described method, the present invention was completed based on this.
따라서, 본 발명의 목적은 붕괴성 필름의 가공성, 물성 및 2차 가공성에 뛰어난 특성을 나타내는 폴리에틸렌 수지 조성물을 제공하는데 있다.Accordingly, an object of the present invention is to provide a polyethylene resin composition exhibiting excellent properties in processability, physical properties and secondary processability of the collapsible film.
본 발명의 다른 목적은 상기 조성물을 이용하여 제조한 필름을 제공하는데 있다.Another object of the present invention is to provide a film produced using the composition.
상기 목적을 달성하기 위한 본 발명의 조성물은 1) 전분과 폴리카프로락톤을 포함하고 있는 생분해성 마스터뱃치 30 내지 50wt%, 2) 용융지수가 0.5∼2.0g/10분이고, 밀도가 0.920∼0.930g/cc이며, 분자량 분포를 나타내는 스트레스 익스포넨샬(Stress Exponetial)이 1.23∼1.40인 공단량체로서 탄소원자수가 4개 이상인 알파-올레핀을 포함하는 선형저밀도 폴리에틸렌 (LLDPE)수지 50∼70wt%, 3) 상기 1) 및 2)의 혼합성분 100중량부에 대하여 용융지수가 2.0∼15g/10분이고, 밀도가 0.915∼0.920g/cc이며, 분자량 분포를 나타내는 가스크로마토그래프 상에서 바이모달리티의 특성을 나타내는 고압저밀도 폴리에틸렌 수지 5∼30중량부, 및 4) 상기 1) 및 2)의 혼합성분 100중량부에 대하여 용융지수가 0.5∼5g/10분이고, 밀도가 0.925∼0.940g/cc이며, 초산비닐공중합체의 양이 5∼20wt%인 에틸렌 초산비닐 공중합 수지 0∼15중량부로 구성된다.Composition of the present invention for achieving the above object is 1) 30 to 50wt% biodegradable masterbatch containing starch and polycaprolactone, 2) melt index is 0.5 to 2.0g / 10min, density is 0.920 to 0.930g 50-70 wt% of linear low density polyethylene (LLDPE) resin containing alpha-olefins having 4 or more carbon atoms as a comonomer having a stress exponential of 1.23 to 1.40 / cc, showing a molecular weight distribution High pressure and low density showing bimodality characteristics on a gas chromatograph having a melt index of 2.0 to 15 g / 10 minutes, a density of 0.915 to 0.920 g / cc, and a molecular weight distribution with respect to 100 parts by weight of the mixed components of 1) and 2). 5 to 30 parts by weight of polyethylene resin, and 4) a melt index of 0.5 to 5 g / 10 minutes, a density of 0.925 to 0.940 g / cc, and a vinyl acetate copolymer based on 100 parts by weight of the mixed components of 1) and 2). Ethylene Acetate in 5 to 20wt% It consists of 0-15 weight part of vinyl copolymer resins.
상기 다른 목적을 달성하기 위한 본 발명에 따른 필름은 상기 조성물을 공냉팽창법으로 성형시켜 인장강도가 MD방향이 130kg/cm 이상이고, TD방향이 100kg/cm 이상이며, 항복점 인장강도가 110∼150kg/cm2이고, 두께가 15∼60㎛인 것으로 이루어진다.The film according to the present invention for achieving the above another object is formed by the air-expanding method to the tensile strength of the MD direction of 130kg / cm or more, TD direction of 100kg / cm or more, yield point tensile strength of 110 ~ 150kg / cm 2 and the thickness is 15-60 micrometers.
이하 본 발명을 좀 더 구체적으로 살펴보면 다음과 같다.Looking at the present invention in more detail as follows.
본 발명에 제1성분으로 사용되는 전분과 폴리카프로락톤을 포함하고 있는 생분해성 마스터뱃치는 미합중국 특허 제5,861,461호의 개시된 조성물을 포함하는 제 품이 바람직하나, 이에 제한받지 않고 당업계의 통상의 지식을 가진자가 응용할 수 있는 모든 생분해성 조성물을 포함한다. 상기 생분해성 마스터뱃치의 사용량은 30 내지 50wt%로 사용되며, 30wt% 미만이면 분해성능이 약화되어 생붕괴성 필름의 의미가 퇴색되고, 50wt%를 초과하면 분해성능은 향상되나 물성이 약해지고 제품가격이 상승되는 경향이 있다.Biodegradable masterbatches containing starch and polycaprolactone used as the first component in the present invention are preferably products comprising the disclosed composition of US Pat. No. 5,861,461, but are not limited thereto. Includes all biodegradable compositions to which an isolator can apply. The amount of the biodegradable masterbatch is used in 30 to 50wt%, less than 30wt%, the degradation performance is weakened, the meaning of the biodegradable film is faded, and if it exceeds 50wt%, the degradation performance is improved but the physical properties are weak and the product price This tends to be elevated.
제2성분으로 사용되는 선형저밀도 폴리에틸렌(LLDPE) 수지는 용융지수가 0.5∼2.0g/10분이고, 밀도가 0.920∼0.930g/cc이며, 분자량 분포를 나타내는 스트레스 익스포넨샬(Stress Exponetial)이 1.23∼1.40인 공단량체로서 탄소원자수가 4개 이상인 알파-올레핀을 포함한다. 이러한 조건을 만족하는 선형저밀도 폴리에틸렌 수지는 필름성형시 가공성이 우수하고 생붕괴성 필름의 물성이 우수하며, 바람직한 사용량은 50∼70wt%이다. 이때, 상기 사용량이 50wt% 미만이면 필름물성이 급격히 저하되고, 70wt%를 초과하면 분해성능이 약화되고, 생분해성 마스타뱃치가 30%이상 함유되어야 하는 생붕괴성 필름의 규격을 만족할 수 없다.The linear low density polyethylene (LLDPE) resin used as the second component has a melt index of 0.5 to 2.0 g / 10 minutes, a density of 0.920 to 0.930 g / cc, and a stress exponental of 1.23 to Comonomer of 1.40, containing alpha-olefins of 4 or more carbon atoms. The linear low density polyethylene resin that satisfies these conditions has excellent processability during film forming and excellent physical properties of the biodegradable film, and the preferred amount of use is 50 to 70 wt%. At this time, when the amount of use is less than 50wt%, the film properties are drastically lowered. If the amount is more than 70wt%, the degradation performance is weakened, and the biodegradable film that has a biodegradable masterbatch 30% or more cannot be satisfied.
한편, 본 발명에 제3성분으로 사용되는 고압저밀도 폴리에틸렌 수지는 용융지수가 2.0∼15g/10분이고, 밀도가 0.915∼0.920g/cc이며, 분자량 분포를 나타내는 가스크로마토그래프 상에서 바이모달리티(Bi-modality)의 특성을 나타내는 것이 용융상태에서 강도를 유지하고 압출부하를 감소시키는 점에서 바람직하며, 그 사용량은 상기 제1성분 및 제2성분의 혼합성분 100중량부에 대하여 5∼30중량부가 바람직하다. 이때, 상기 사용량이 5중량부 미만이면 블렌드 제품의 상승효과가 미비하고, 30중량부를 초과하면 물성이 급격히 저하되는 경향이 있다.On the other hand, the high-pressure low-density polyethylene resin used as the third component in the present invention has a melt index of 2.0 to 15 g / 10 minutes, a density of 0.915 to 0.920 g / cc, and bi-modality on a gas chromatograph showing molecular weight distribution. Is preferably used in terms of maintaining strength in the molten state and reducing the extrusion load, and the amount thereof is preferably 5 to 30 parts by weight based on 100 parts by weight of the mixed components of the first component and the second component. At this time, if the amount is less than 5 parts by weight, the synergistic effect of the blended product is insignificant, and if it exceeds 30 parts by weight, the physical properties tend to decrease rapidly.
또한, 제4성분인 에틸렌 초산비닐 공중합 수지는 본 발명의 수지에 상용성을 향상시키는 역할을 하며, 용융지수가 0.5∼5g/10분이고, 밀도가 0.925∼0.940g/cc이며, 초산비닐공중합체의 양이 5∼20wt%인 것이 생분해성 마스타뱃치와 PE의 상용성 증진 측면에서 바람직하다. 그 사용량은 상기 제1성분 및 제2성분의 혼합성분 100중량부에 대하여 0∼15중량부가 바람직한데, 15중량부를 초과하면 생붕괴성 필름의 물성이 저하되고 용융강도가 저하되는 단점이 있다.In addition, the fourth component ethylene vinyl acetate copolymer resin serves to improve the compatibility of the resin of the present invention, the melt index is 0.5 ~ 5g / 10 minutes, the density is 0.925 ~ 0.940g / cc, vinyl acetate copolymer An amount of 5 to 20 wt% is preferred in view of promoting compatibility of the biodegradable masterbatch with PE. The amount used is preferably 0 to 15 parts by weight based on 100 parts by weight of the mixed component of the first component and the second component. When the amount is more than 15 parts by weight, the physical properties of the biodegradable film are lowered and the melt strength is lowered.
이러한 성분을 갖는 상기 생붕괴성 선형저밀도폴리에틸렌 수지조성물은 용융지수가 0.5∼3.0g/분이고, 밀도가 0.915∼1.2g/cc로서, 이를 이용하여 공냉팽창법으로 성형시켜 제조된 생붕괴성 필름은 KS 인장강도가 MD방향이 130kg/cm 이상이고, TD방향이 100kg/cm 이상이며, 항복점 인장강도가 110∼150kg/cm2으로 가공부하가 기존 LLDPE, 즉 범용 블로운필름 그레이드 대비 15% 이상 감소되고, 용융강도 (Melt Strength)가 10% 이상 향상된 것이 특징으로 가공성과 기계적물성을 동시에 향상시킬 수 있다. 또한, 본 발명에 따르면, 상기 필름의 두께는 KSS M1008에 명시된 규격 20∼50㎛를 모두 만족시키는 15∼60㎛까지 안정화된 필름을 생산할 수 있고, 제품품질이 향상되고 필름성형을 위한 압출기 작동시 압출부하가 감소되어 생산량을 늘릴 수 있다.The biodegradable linear low density polyethylene resin composition having such a component has a melt index of 0.5 to 3.0 g / min and a density of 0.915 to 1.2 g / cc. KS tensile strength is over 130kg / cm in MD direction, over 100kg / cm in TD direction, yield point tensile strength is 110 ~ 150kg / cm 2 and processing load is reduced by more than 15% compared to conventional LLDPE, general blown film grade. And, the melt strength (Melt Strength) is characterized by an improvement of more than 10% can be improved at the same time workability and mechanical properties. In addition, according to the present invention, the thickness of the film can produce a film stabilized up to 15 ~ 60㎛ satisfying all the specifications 20-50㎛ specified in KSS M1008, the product quality is improved and when the extruder for film forming Extrusion load can be reduced to increase production.
이하 실시예를 통하여 본 발명을 좀 더 구체적으로 살펴보지만, 하기 예에 본 발명의 범주가 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited to the following examples.
실시예 1 내지 3Examples 1 to 3
하기 표 1에 기재된 성분을 각각의 펠레트 상태에서 헨쉘믹서로 혼합한 후, 드라이 블렌딩하여 사용하였으며, 하기의 가공기기 및 조건에 의해 공냉 팽창법으로 성형시켜 두께가 50㎛, 폭이 42cm인 필름을 제조하였다.The ingredients shown in Table 1 were mixed by Henschel mixer in each pellet state, and then used by dry blending, and were formed by air-cooled expansion method according to the following processing equipment and conditions to form a film having a thickness of 50 μm and a width of 42 cm. Was prepared.
* 가공기기 및 조건* Processing equipment and conditions
- 가공기기: 공냉식 블로운필름기기-Processing equipment: air-cooled blown film equipment
- 가공온도: 130/150/170/18170/170/170℃-Processing temperature: 130/150/170/18170/170/170 ℃
- 스크류 직경: 50mmScrew diameter: 50 mm
- 다이갭: 1.8 mmDie gap: 1.8 mm
- 냉각시스템: 듀얼타입 에어링-Cooling system: Dual type air ring
이렇게 제조된 필름의 가공성, 외관 및 다이드룰 (다이똥) 현상, 및 물성 등을 측정하여 하기에 기재하였다.The processability, appearance and die droop (dietung) phenomenon, physical properties and the like of the thus prepared film were measured and described below.
1) 가공성1) Machinability
본 발명의 생붕괴성 LLDPE 필름의 조성물(도 2참조)은 상기 제2성분, 제3성 분 및 제4성분의 블렌드 특성을 이용하여 블로운필름의 버블안정성을 향상시킨것 으로 이와 같은 버블안정성, 즉, 용융강도의 상승효과에 의한 것으로 기존의 가공업체가 단순히 LLDPE/LDPE를 드라이 블렌드하여 (J of Ind. & Eng. Chemistry, vol.3, No.2, 1997 참조) 사용하였던것(대조구: 도 1참조) 보다 우수한 가공성을 나타낸다. 그 결과를 도 1 및 2에 나타내었다.The composition of the biodegradable LLDPE film of the present invention (see FIG. 2) improves the bubble stability of the blown film by using the blend properties of the second component, the third component, and the fourth component. In other words, due to the synergistic effect of melt strength, the existing processing company simply used LLDPE / LDPE for dry blending (see J of Ind. & Eng. Chemistry, vol. 3, No. 2, 1997). : See FIG. 1) Better workability. The results are shown in FIGS. 1 and 2.
또한, 필름의 두께가 안정화되어 제품품질이 향상되고 필름성형을 위한 압출기 작동시 하기 표 2와 같이 압출부하가 감소되어 생산량을 늘릴 수 있다.In addition, the thickness of the film is stabilized, the product quality is improved and the extrusion load is reduced when operating the extruder for film molding as shown in Table 2 can increase the yield.
2) 외관 및 다이드룰 (다이똥) 현상: 생붕괴성 필름의 특성상 도 3과 같이 다이드룰 현상이 심각하여 외관을 손상시키고 필름생산성을 저하시키나, 본 발명의 조성물(실시예 1)을 사용하였을 경우 그 정도가 반 수준으로 줄어 생산성 이 향상되었다.2) Appearance and Die Dul (Diadung) Phenomenon: Due to the characteristics of the biodegradable film, as shown in Fig. 3, the die drool phenomenon is seriously damaged and the film productivity is reduced, but the composition of the present invention (Example 1) When used, the level was reduced by half to improve productivity.
3) 물성개선: 상기 필름의 물성은 한국합성수지공업협동조합연합회 표준규격 (KSS M 1008)에 따라 측정하였으며 그 결과는 하기 표 3에 나타내었다.3) Improvement of physical properties: The physical properties of the film were measured according to the KS M 1008 standard specification and the results are shown in Table 3 below.
전술한 바와 같이, 본 발명의 조성물은 성형온도를 낮추어 생분해성 마스터배치의 변형을 방지하여 연기 및 다이드룰(die drool) 또는 다이똥의 형성을 줄이고 블로운필름의 버블을 안정화시켜 필름의 두께가 안정화되고 생산성을 향상시킬 수 있다. 또한 필름 물성중 충격강도, 인열강도 (초기찢김성 및 진행찢김성)가 향상되어 질기다는 평가를 받으며 항복점 인장강도, 굴곡강도 및 슬립(Slip)성능이 우수하여 이를 필름의 후가공에도 뛰어난 가공성능을 나타낸다.
As described above, the composition of the present invention lowers the forming temperature to prevent deformation of the biodegradable masterbatch, thereby reducing the formation of smoke and die drool or dietling and stabilizing the bubble of the blown film to stabilize the film thickness. Can be stabilized and productivity is improved. In addition, it is evaluated that the impact strength and tearing strength (initial tearing and progressive tearing) of the film properties are improved, and the yield point tensile strength, flexural strength and slip performance are excellent. Indicates.
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| KR970042813A (en) * | 1995-12-06 | 1997-07-26 | 조규향 | Biodegradable plastic composition in which starch is chemically bonded to matrix resin, preparation method thereof, and molded article prepared therefrom |
| KR19980046593A (en) * | 1996-12-12 | 1998-09-15 | 조규향 | Bio / photodegradable agricultural mulching film composition, preparation method thereof and moldings produced therefrom |
| KR20000006774A (en) * | 1999-11-02 | 2000-02-07 | 이종학 | Bio-disintegrable resin composition and preparing method thereof |
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| KR940000514A (en) * | 1992-06-23 | 1994-01-03 | 박홍기 | Degradable Resin Composition |
| JPH07258467A (en) * | 1994-03-18 | 1995-10-09 | Chisso Corp | Readily degradable molding and its production |
| JPH08245837A (en) * | 1995-03-13 | 1996-09-24 | Chisso Corp | Composition for easily degradable film or sheet |
| KR970042813A (en) * | 1995-12-06 | 1997-07-26 | 조규향 | Biodegradable plastic composition in which starch is chemically bonded to matrix resin, preparation method thereof, and molded article prepared therefrom |
| KR19980046593A (en) * | 1996-12-12 | 1998-09-15 | 조규향 | Bio / photodegradable agricultural mulching film composition, preparation method thereof and moldings produced therefrom |
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