KR100574288B1 - Plastic film resin composition for fruit tree bag - Google Patents
Plastic film resin composition for fruit tree bag Download PDFInfo
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- KR100574288B1 KR100574288B1 KR1019990058939A KR19990058939A KR100574288B1 KR 100574288 B1 KR100574288 B1 KR 100574288B1 KR 1019990058939 A KR1019990058939 A KR 1019990058939A KR 19990058939 A KR19990058939 A KR 19990058939A KR 100574288 B1 KR100574288 B1 KR 100574288B1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/10—Devices for affording protection against animals, birds or other pests
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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- C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
- C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C08L31/04—Homopolymers or copolymers of vinyl acetate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
본 발명은 과수봉지용 플라스틱 필름용 수지 조성물에 관한 것으로서, 보다 상세하게는 폴리에틸렌, 에틸렌비닐아세테이트, 실리콘 그라프트 폴리에틸렌, 탄산칼슘 및 첨가제로 이루어져 필름을 제조하였을때 통기성(투습성)이 우수하고 슬립성이 뛰어나 과수봉지용으로 적용이 가능한 플라스틱 필름용 수지 조성물에 관한 것이다.The present invention relates to a resin composition for plastic films for fruit bags, and more particularly, when the film is made of polyethylene, ethylene vinyl acetate, silicon graft polyethylene, calcium carbonate and additives, it has excellent breathability (moisture permeability) and slipperiness. It is excellent and relates to the resin composition for plastic films which can be applied for fruit bag sealing.
Description
본 발명은 과수봉지용 플라스틱 필름용 수지 조성물에 관한 것으로서, 보다 상세하게는 폴리에틸렌, 에틸렌비닐아세테이트, 실리콘 그라프트 폴리에틸렌, 탄산칼슘 및 첨가제로 이루어져 과수봉지용으로 적용하였을때 투습성이 우수하고 슬립성이 뛰어난 것을 특징으로 하는 플라스틱 필름용 수지 조성물에 관한 것이다.The present invention relates to a resin composition for plastic films for fruit bags, and more particularly, made of polyethylene, ethylene vinyl acetate, silicone graft polyethylene, calcium carbonate and additives, when applied for fruit bags, excellent moisture permeability and slip properties. It is related with the resin composition for plastic films which is excellent.
일반적으로 과수봉지는 수인성 세균이나 조류에 의한 피해방지 및 과일표면의 착색을 목적으로 사용하고 있는데 현재 과수봉지의 재질은 주로 종이이다. 그러나 종이가 수분이나 외압에 의해 쉽게 찢어지는 문제점이 있고, 과일표면과 직접 맞닫는 부분의 표면이 매끄럽지 못해 과일표면에 상처를 주는 경우도 있다. 이러한 문제점을 해결하기 위해 최근에는 종이에 왁스코팅을 하여 수분이나 외압에 대한 내구성을 향상시키고 더불어 종이표면을 매끄럽게 해 줌으로써 과피의 손상을 막을 수가 있었다. 그러나 종이에 왁스코팅을 할 경우 종이가 갖고 있는 기공(통기)을 막게 되어 봉투의 투습성 저하를 가져올 수 있으며, 사용후 봉지를 재활용하지 못하는 문제점도 있다. 한편, 제조원가 측면에서도 종이에 왁스코팅을 하게 되면 일 반 종이로 과수봉지를 제조하였을때보다 제조비용이 30∼40% 상승하게 되는데, 이에 대한 사용자측의 원가부담도 높다.In general, fruit bags are used for the purpose of preventing damage by waterborne bacteria or algae and coloring the surface of fruit. Currently, fruit bags are mainly made of paper. However, there is a problem that the paper is easily torn due to moisture or external pressure, and the surface of the part directly contacting the fruit surface is not smooth, which may hurt the fruit surface. In order to solve this problem, recently, wax coating on paper has improved the durability against moisture or external pressure and smoothed the paper surface to prevent damage to the skin. However, if the wax coating on the paper to prevent the pores (ventilation) of the paper can bring about the moisture permeability of the bag, there is also a problem that can not recycle the bag after use. On the other hand, in terms of manufacturing cost, wax coating on paper increases the manufacturing cost by 30 to 40% compared to the case of manufacturing the fruit bag with ordinary paper, and the user's cost burden is high.
과수봉지의 비용상승 문제를 개선하기 위해 과일형상의 플라스틱 사출물을 만들어 과수보호용 덮개(봉투)로 적용한 경우가 있었는데 이것은 제조원가 절감 및 조류 피해 방지 측면에서 탁월한 효과가 있었으나, 사출물에 기공이 전혀 없기 때문에 과일표면이 짓무르는 현상과 특히, 배봉지로 적용했을때 동록이 발생하는 문제가 있었다. 또한, 플라스틱 재질의 부직포로 과수봉지를 만들어 사용한 경우도 있었는데, 이 경우 부직포에 색상을 자유자재로 넣을 수 있어 과피 착색에 대한 우수한 효과와 플라스틱 재질에 따른 조류피해 방지 및 제조원가 절감측면에서도 많은 이점이 있었다. 특히 부직포가 통기성이 우수하면서 내수성에도 문제가 없어 최근들어 과수봉지를 부직포로 적용하려는 노력이 많이 진행되고 있다. 그러나 부직포가 일정시간 수분을 흡습하는 성질이 있어 비를 동반한 태풍이 불어올때 수분을 흡습한 상태에서 봉지 자중에 의해 과수가 떨어질 염려가 있다.In order to improve the cost increase of fruit bags, fruit-shaped plastic injection moldings were made and applied as an over-protective cover (envelope). There was a problem that the surface was crushed, and in particular, when the greenery is applied as a bag. In addition, there were cases in which fruit bags were made of plastic non-woven fabrics. In this case, color can be freely added to the non-woven fabrics. there was. In particular, since nonwoven fabrics have excellent breathability and no problem in water resistance, efforts have recently been made to apply fruit bags to nonwoven fabrics. However, the nonwoven fabric has a property of absorbing moisture for a certain period of time, so when the typhoon with rain blows, there is a fear that the fruit tree may fall by the weight of the bag in the state of absorbing moisture.
본 발명의 목적은 상기와 같은 문제점을 개선하기 위한 것으로서, 제조원가가 저렴하고, 봉지표면에 기공을 쉽게 만들수 있어 과수봉지로 적용하였을때 통기성(투습성)이 우수하며, 봉지표면이 매끄러워 과피의 손상도 막을 수 있고, 봉지에 색상도 자유롭게 넣을 수가 있어 과일착색에도 문제가 없는 과수봉지용 플라스틱 필름용 수지 조성물을 제공하는 것이다.An object of the present invention is to improve the above problems, the manufacturing cost is low, can easily make pores on the surface of the bag, when applied as a fruit bag, the breathability (breathability) is excellent, the surface of the bag is smooth damage of the skin It is also possible to provide a resin composition for plastic film for fruit bag, which can be prevented, and the color can be freely put in the bag, and the fruit coloring is not a problem.
본 발명의 과수봉지용 플라스틱 필름용 수지 조성물은 폴리에틸렌 20~70중량%, 에틸렌비닐아세테이트 5~20중량%, 탄산칼슘 20~60중량%, 실리콘 그라프트 폴리에틸렌 5~30중량% 및 기타 첨가제를 포함하는 것을 특징으로 한다.The resin composition for plastic film for fruit bag of the present invention comprises 20 to 70% by weight polyethylene, 5 to 20% by weight ethylene vinyl acetate, 20 to 60% by weight calcium carbonate, 5 to 30% by weight silicone graft polyethylene and other additives Characterized in that.
본 발명에서 사용되는 폴리에틸렌은 전체 수지 조성물에 대하여 20~70중량%가 사용된다. 폴리에틸렌이 20중량% 미만일 경우에는 필름의 인장강도가 떨어져 봉투제조나 운반, 과수봉지로 사용중에 외압에 의해 쉽게 파손될 염려가 있으며, 그 함량이 70중량%를 초과하는 경우에는 통기성 필름 제조를 위해 연신공정시 필름에 기공 발생률이 떨어져 결과적으로 통기성(투습성)이 낮아지는 현상이 발생한다. The polyethylene used in the present invention is used 20 to 70% by weight based on the total resin composition. If the polyethylene is less than 20% by weight, the tensile strength of the film may drop, and the bag may be easily damaged by external pressure during use in bag production, transportation, or fruit bag, and when the content exceeds 70% by weight, it may be stretched to produce a breathable film. Porosity is lowered in the film during the process, resulting in a lower breathability (moisture permeability).
본 발명에서 사용되는 에틸렌비닐아세테이트는 필름에 인열강도를 높이기 위해 5~20중량%를 사용한다. 사용된 에틸렌비닐아세테이트의 함량이 5중량% 미만일 경우에는 에틸렌비닐아세테이트의 사용 효과가 거의 없으며, 그 함량이 20중량%를 초과할 경우 인열강도는 우수하나 필름표면이 끈적거려 봉지 제조후 과수를 쌀때 개구성이 떨어지는 문제가 발생할 수 있다. Ethylene vinyl acetate used in the present invention uses 5 to 20% by weight to increase the tear strength in the film. When the content of ethylene vinyl acetate used is less than 5% by weight, there is little effect of using ethylene vinyl acetate, and when the content is more than 20% by weight, the tear strength is excellent, but the film surface is sticky and the fruit is made after the bag is manufactured. The problem of poor openness may occur when cold.
본 발명에서 사용되는 탄산칼슘은 수지와 상용성이 없어 필름성형후 필름을 연신시켰을때 수지와의 계면이 벌어지면서 필름에 기공을 만들어 주는 역할을 하는데, 그 사용함량은 20~60중량%이다. 사용된 탄산칼슘의 함량이 20중량% 미만일 경우에는 필름 제조시 필름에 기공 발생률이 떨어져 통기성(투습성)이 저하되며, 그 함량이 60중량%를 초과할 경우에는 필름에 기공 발생효과는 우수하나 필름의 인장강도가 떨어져 필름의 연신공정에서 필름이 파열될 가능성이 있다. The calcium carbonate used in the present invention does not have compatibility with the resin, and when the film is stretched after the film is formed, the interface with the resin opens and serves to make pores in the film, and the content thereof is 20 to 60% by weight. If the content of the calcium carbonate used is less than 20% by weight, the incidence of pores in the film decreases due to the decrease in air permeability (permeability), and when the content exceeds 60% by weight, the pore generation effect is excellent in the film. There is a possibility that the film ruptures in the stretching process of the film because the tensile strength of is lowered.
본 발명에서 사용되는 실리콘 그라프트 폴리에틸렌은 과량의 탄산칼슘이 충 진된 플라스틱 필름을 과수봉지로 적용했을때 필름표면이 거칠어 과피를 손상시킬 수 있는 문제를 개선하기 위해 사용한 것으로서, 필름 표면을 매끄럽게 만들어 주는 역할을 한다. 이를 위해 첨가되는 실리콘 그라프트 폴리에틸렌의 함량은 5~30중량%를 사용하는데, 실리콘 그라프트 폴리에틸렌의 함량이 5중량% 미만일 경우에는 그 첨가 효과가 거의 없으며, 그 함량이 30%를 초과할 경우 매끄러움성은 다소 증가하나 첨가한 만큼의 증가효과가 미미해 경제적 측면에서 도움이 되질 않는다.The silicone graft polyethylene used in the present invention is used to improve the problem that the film surface is rough when the plastic film filled with excess calcium carbonate is applied to the fruit bag, thereby damaging the skin, thereby making the film surface smooth. Play a role. For this purpose, the content of the silicone graft polyethylene added is 5 to 30% by weight. When the content of the silicone graft polyethylene is less than 5% by weight, the effect of addition is almost insignificant. Although the sex is slightly increased, the added effect of the addition is insignificant, which does not help economically.
본 발명의 수지 조성물에는 기타 첨가제가 함유될 수 있는데, 이러한 첨가제는 세균에 의한 감염을 막기 위한 항균제(무기계)를 포함해서 불소계 가공조제, 내부활제, 산화방지제, 제습제 등이다.The resin composition of the present invention may contain other additives, such additives include fluorine-based processing aids, internal lubricants, antioxidants, dehumidifying agents and the like, including antimicrobial agents (inorganic) to prevent infection by bacteria.
본 발명은 이하 실시예와 비교예를 통해 좀더 구체적으로 이해될 수 있으며, 이하 실시예와 비교예들은 본 발명의 범위를 한정하고자 하는 것이 아니라 예시적인 목적으로 기재하는 것이다.The present invention can be understood in more detail through the following examples and comparative examples, the following examples and comparative examples are not intended to limit the scope of the present invention but are described for illustrative purposes.
실시예 1∼4, 비교예 1∼4Examples 1-4, Comparative Examples 1-4
표 1의 수지 조성물은 밤바리믹서에서 수지 온도 220℃를 기준으로 30분간 용융혼합시킨 후 펠렛으로 만들었다. 이것을 일축연신기가 붙어 있는 티다이 압출성형기에서 필름을 성형하였으며 필름에 통기성 부여를 위해 기계방향으로 일축연신시켰다. 필름 성형온도는 다이스 기준으로 265℃이었으며, 필름성형후 연신 공정을 위한 필름의 열처리 온도는 115℃이었다. 또한 필름의 연신비율은 1.7배이었으며, 최종 필름의 두께는 60㎛이었다.The resin composition of Table 1 was pelletized after melt mixing for 30 minutes based on a resin temperature of 220 ° C. in a balvarie mixer. The film was formed on a T-die extrusion machine equipped with a uniaxial stretching machine and uniaxially stretched in the machine direction to impart breathability to the film. The film forming temperature was 265 ° C. on a die basis, and the heat treatment temperature of the film for the stretching process after film forming was 115 ° C. In addition, the stretch ratio of the film was 1.7 times, and the thickness of the final film was 60 μm.
상기 실시예와 비교예에 따른 필름에 대해 다음과 같은 방법으로 통기성(투 습성)과 매끄러움성(마찰계수)을 평가하였다.About the films according to the above Examples and Comparative Examples, the air permeability (moisture permeability) and the smoothness (friction coefficient) were evaluated in the following manner.
통기성 평가Breathability rating
필름의 통기성 평가는 결과적으로 봉지의 투습도를 평가하기 위한 일환으로 본 예에서는 통기을 투습도로 평가하였다. 투습도의 평가는 KS A 1013에 의거하여 실험을 진행하였으며 투습도에 대한 요구 spec.이 정해진 것이 없어 통상적으로 적용되는 통기성 필름의 spec.을 목표치로 설정하였다. 그 값은 2,500∼4,000 g/24hr/㎡이다.As a result of evaluating the air permeability of the film as a result of evaluating the moisture permeability of the bag, in this example, the air permeability was evaluated. In order to evaluate the moisture permeability, the experiment was conducted according to KS A 1013. Since there is no specific spec for moisture permeability, the spec. Of a breathable film that is commonly applied is set as a target value. The value is 2,500-4,000 g / 24hr / m <2>.
매끄러움성 평가Smoothness evaluation
필름표면의 매끄러움의 평가는 ASTM D 1894에 의거하여 연신된 필름의 마찰계수로 평가하였다. 마찰계수가 작을수록 표면이 더 매끄러움을 나타내는데 본 발명의 목표치는 0.6 이하이다.The smoothness of the film surface was evaluated by the coefficient of friction of the stretched film according to ASTM D 1894. The smaller the coefficient of friction, the smoother the surface. The target value of the present invention is 0.6 or less.
주) week)
1. 폴리에틸렌 : 삼성종합화학 6200F1.Polyethylene: Samsung General Chemical 6200F
2. 에틸렌비닐아세테이트 : 삼성종합화학 E120A2. Ethylene vinyl acetate: Samsung General Chemicals E120A
3. 탄산칼슘 : OMYA 1T-AV3. Calcium Carbonate: OMYA 1T-AV
4. 실리콘 그라프트 폴리에틸렌 : 다우코닝 MB50-0024. Silicone Graft Polyethylene: Dow Corning MB50-002
5. 첨가제 : 항균제(0.5phr), 내부활제(0.2phr), 산화방지제(0.3phr), 가공조제(0.1phr), 제습제(0.1phr)5. Additives: Antimicrobial (0.5phr), Internal lubricant (0.2phr), Antioxidant (0.3phr), Processing aid (0.1phr), Dehumidifier (0.1phr)
이상에서 볼 수 있는 바와 같이 본 발명에 의해 제조된 수지 조성물은 과수봉지로 적용했을때, 왁스코팅된 종이봉투 대비 제조원가가 저렴하고, 통기성(투습성)의 확보에도 전혀 문제가 없으며, 필름 표면이 매끄러워 과피의 손상도 방지할 수가 있다. 또한, 탄산칼슘을 함유한 플라스틱 재질이라 봉투에 색상부여가 자유로워 과피 착색에도 문제가 없다.As can be seen from the above, when the resin composition prepared by the present invention is applied to an fruit bag, the manufacturing cost is lower than that of a wax-coated paper bag, and there is no problem in ensuring breathability (moisture permeability), and the film surface is smooth. It can also prevent damage to the skin. In addition, since it is a plastic material containing calcium carbonate, it is free to color the bag, and there is no problem in coloring the skin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990058939A KR100574288B1 (en) | 1999-12-18 | 1999-12-18 | Plastic film resin composition for fruit tree bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990058939A KR100574288B1 (en) | 1999-12-18 | 1999-12-18 | Plastic film resin composition for fruit tree bag |
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| KR20010056226A KR20010056226A (en) | 2001-07-04 |
| KR100574288B1 true KR100574288B1 (en) | 2006-04-26 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6215252A (en) * | 1985-07-12 | 1987-01-23 | Showa Electric Wire & Cable Co Ltd | Crosslinked polyolefin composition |
| JPS6272735A (en) * | 1985-09-27 | 1987-04-03 | Toyo Ink Mfg Co Ltd | Flame-retardant resin composition |
| KR870007230A (en) * | 1986-01-20 | 1987-08-17 | 노무라 마사오 | Flame retardant olefin resin composition |
| KR0170559B1 (en) * | 1995-10-05 | 1999-03-30 | 성기웅 | Thermoplastic film composition |
| KR20010046400A (en) * | 1999-11-12 | 2001-06-15 | 유현식 | Polyethylene resin composition for plastic closure and its article |
| KR20010047824A (en) * | 1999-11-23 | 2001-06-15 | 유현식 | Polyolefin resin composition |
-
1999
- 1999-12-18 KR KR1019990058939A patent/KR100574288B1/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6215252A (en) * | 1985-07-12 | 1987-01-23 | Showa Electric Wire & Cable Co Ltd | Crosslinked polyolefin composition |
| JPS6272735A (en) * | 1985-09-27 | 1987-04-03 | Toyo Ink Mfg Co Ltd | Flame-retardant resin composition |
| KR870007230A (en) * | 1986-01-20 | 1987-08-17 | 노무라 마사오 | Flame retardant olefin resin composition |
| KR0170559B1 (en) * | 1995-10-05 | 1999-03-30 | 성기웅 | Thermoplastic film composition |
| KR20010046400A (en) * | 1999-11-12 | 2001-06-15 | 유현식 | Polyethylene resin composition for plastic closure and its article |
| KR20010047824A (en) * | 1999-11-23 | 2001-06-15 | 유현식 | Polyolefin resin composition |
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| KR20010056226A (en) | 2001-07-04 |
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