KR19980082550A - Polyethylene resin film with automatic temperature control - Google Patents
Polyethylene resin film with automatic temperature control Download PDFInfo
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- KR19980082550A KR19980082550A KR1019970017530A KR19970017530A KR19980082550A KR 19980082550 A KR19980082550 A KR 19980082550A KR 1019970017530 A KR1019970017530 A KR 1019970017530A KR 19970017530 A KR19970017530 A KR 19970017530A KR 19980082550 A KR19980082550 A KR 19980082550A
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
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- C08L23/06—Polyethene
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Abstract
본 발명은 폴리에틸렌계 수지 필름에 관한 것으로서, 더욱 상세하게는 폴리에틸렌에 액상파라핀이 적절하게 혼합됨으로써 자동온도조절이 가능한 폴리에틸렌계 수지 필름에 관한 것이다.The present invention relates to a polyethylene resin film, and more particularly, to a polyethylene resin film capable of automatic temperature control by appropriately mixing liquid paraffin in polyethylene.
본 발명의 목적은 폴리에틸렌계 수지의 투명성을 유지하면서 그 자체로 자동온도조절이 가능하여 상기 수지로 제조된 비닐하우스의 내부온도가 주야로 일정하게 유지되는 폴리에틸렌계 수지 필름을 제공하는 것이다.It is an object of the present invention to provide a polyethylene-based resin film that maintains the transparency of the polyethylene-based resin itself is capable of automatic temperature control so that the internal temperature of the vinyl house made of the resin is kept constant day and night.
본 발명에 따르면, 주성분을 폴리에틸렌으로 하여 액상파라핀이 상기 폴리에틸렌과 액상파라핀의 합계량 100중량% 당 5~30중량%가 포함되고 상기 폴리에틸렌과 액상파라핀의 합계량 100중량부 당 고무성분 10중량부 이하가 포함된 자동온도조절이 가능한 폴리에틸렌계 수지 필름이 제공된다.According to the present invention, the liquid paraffin comprises 5 to 30% by weight per 100% by weight of the total amount of the polyethylene and liquid paraffin and the rubber component 10 parts by weight or less per 100 parts by weight of the total amount of the polyethylene and liquid paraffin Provided is an included thermostatic polyethylene-based resin film.
Description
본 발명은 폴리에틸렌계 수지 필름에 관한 것으로서, 더욱 상세하게는 폴리에틸렌에 액상파라핀이 적절하게 혼합됨으로써 자동온도조절이 가능한 폴리에틸렌계 수지 필름에 관한 것이다.The present invention relates to a polyethylene resin film, and more particularly, to a polyethylene resin film capable of automatic temperature control by appropriately mixing liquid paraffin in polyethylene.
일반적으로 농작물 재배용 비닐하우스는 대형 비닐하우스와 내부에 위치하는 소형 비닐하우스로 구성되며, 주간의 경우 외부 기온에 의해 비닐하우스 내부온도가 약 40℃~50℃가 되는데 실제 농작물이 성장하는데 알맞은 온도는 25℃~27℃ 정도이므로 약 15℃ 이상 불필요한 온도가 있음을 알 수 있다. 그리고, 약 40℃~50℃의 하우스 내부에서 작업을 할 경우 온도에 의한 각종 질환을 얻게 되고 농작물에도 나쁜 영향을 준다. 또한, 기온이 내려가는 야간에는 비닐하우스의 내부온도를 보온하기 위하여 헝겊이나 짚으로 덮어야 하는 조작을 하여야만하는 불편함이 있었다.In general, a greenhouse for growing crops is composed of a large plastic house and a small plastic house located inside. In the daytime, the internal temperature of the vinyl house is about 40 ° C. to 50 ° C. due to the outside temperature. Since it is about 25 ° C to 27 ° C, it can be seen that there is an unnecessary temperature of about 15 ° C or more. And, if you work in the house of about 40 ℃ ~ 50 ℃ to get various diseases due to temperature and adversely affects crops. In addition, at night when the temperature decreases, there was an inconvenience of having to cover with a cloth or straw to keep the inside temperature of the plastic house warm.
비닐하우스의 내부온도를 약 25℃~27℃로 유지하기 위하여 종래에는 단순히 배출구(파이프)를 설치하거나 비닐에 구멍을 천공하여 주간에는 열고 야간에는 닫는 방법을 사용하였다. 그러나, 사람이 온도를 체크하여 일일이 구멍을 열고 닫아야 하는 불편이 따르며, 온도조절이 자연현상에만 의존하므로 실제효과를 얻지 못하여 농작물의 발육이 부진한 등 많은 문제점이 있었다.In order to maintain the internal temperature of the plastic house at about 25 ℃ ~ 27 ℃ it was conventionally used to simply install a discharge port (pipe) or to punch a hole in the vinyl to open during the day and close at night. However, it is inconvenient that a person checks the temperature and opens and closes the hole one by one. Since temperature control depends only on natural phenomena, there are many problems such as poor growth of crops due to failure to obtain a practical effect.
한편, 농·원예용 필름으로 사용되는 수지로는 폴리에틸렌, 에틸렌초산비닐, 폴리염화비닐 등이 있다. 그러나, 폴리에틸렌은 보온성, 투명성 등에서 에틸렌비닐 공중합체보다 떨어지고 에틸렌비닐 공중합체는 보온성 및 작업강도가 폴리염화비닐보다 낮아서 사용조건에 제약이 있었다.On the other hand, resins used for agricultural and horticultural films include polyethylene, ethylene vinyl acetate, polyvinyl chloride, and the like. However, polyethylene is inferior to ethylene vinyl copolymer in thermal insulation, transparency, etc., and ethylene vinyl copolymer has low thermal insulation and work strength than polyvinyl chloride, thereby limiting the use conditions.
따라서, 농·원예용 필름으로 사용되는 수지의 보온성을 향상하기 위한 종래의 방법으로서 일본특허공고 소 47-13853호에 폴리에틸렌, 에틸렌 초산비닐 공중합체에 실리카 계통의 첨가제를 혼합하는 방법이 기재되어 있으며, 일본공개특허 소 57-160638호에는 폴리에틸렌, 에틸렌 초산비닐 공중합체에 흡수성 수지를 첨가하는 방법이 기재되어 있다.Therefore, Japanese Patent Publication No. 47-13853 describes a method of mixing silica-based additives with polyethylene and ethylene vinyl acetate copolymer as a conventional method for improving the heat retention of resins used for agricultural and horticultural films. Japanese Laid-Open Patent Publication No. 57-160638 discloses a method of adding an absorbent resin to polyethylene and ethylene vinyl acetate copolymer.
상기 방법들에 의하여 폴리에틸렌, 에틸렌 초산비닐 공중합체로 제조된 농·원예용 필름은 보온성은 향상되는 반면, 근본적으로 폴리염화비닐과 같은 보온성이 유지될 수 없고, 또한 상기 첨가제들에 의한 투명도 저하로 인하여 상품성이 떨어지는 문제점이 발생하였다.While the agricultural and horticultural films made of polyethylene and ethylene vinyl acetate copolymers by the above methods are improved in heat retention, they are not able to maintain heat retention such as polyvinyl chloride in principle, and also due to the decrease in transparency due to the additives. Due to this, a problem of deterioration of commerciality occurred.
본 발명의 목적은 폴리에틸렌계 수지의 투명성을 유지하면서 그 자체로 자동온도조절이 가능한 폴리에틸렌계 수지 필름을 제공하는 것이다.An object of the present invention is to provide a polyethylene-based resin film capable of automatic temperature control by itself while maintaining the transparency of the polyethylene-based resin.
도 1은 본 발명에 따른 폴리에틸렌계 수지의 조성비에 따른 융점을 나타내는 그래프이다.1 is a graph showing the melting point according to the composition ratio of the polyethylene resin according to the present invention.
본 발명은 주성분을 폴리에틸렌으로 하여 액상파라핀이 상기 폴리에틸렌과 액상파라핀의 합계량 100중량% 당 5~30중량%가 포함되고 상기 폴리에틸렌과 액상파라핀의 합계량 100중량부 당 강도보강용 고무성분 10중량부 이하가 포함된 자동온도조절이 가능한 폴리에틸렌계 수지 필름에 관한 것이다.According to the present invention, the liquid paraffin comprises 5-30% by weight of 100% by weight of the total amount of the polyethylene and the liquid paraffin, and 10 parts by weight or less of the rubber component for strength reinforcement per 100 parts by weight of the total amount of the polyethylene and the liquid paraffin. It relates to a polyethylene-based resin film capable of thermostatic containing.
좀 더 상세히 설명하면, 본 발명의 폴리에틸렌계 수지는 폴리에틸렌과 액상파라핀이 95중량% : 5중량% ~70중량% : 30중량%의 비율로 혼합되며, 이 때, 폴리에틸렌과 액상파라핀의 합계량 100중량% 당 액상파라핀이 5중량% 미만으로 혼합되면 공융점이 높아지고, 30중량%를 초과하여 혼합되면 공융점이 너무 낮아진다.In more detail, the polyethylene resin of the present invention is a polyethylene and liquid paraffin is mixed in a ratio of 95% by weight: 5% to 70% by weight: 30% by weight, wherein the total amount of polyethylene and liquid paraffin 100% by weight The eutectic point becomes higher when the liquid paraffin is mixed in less than 5% by weight, and the eutectic point becomes too low when mixed in excess of 30% by weight.
또한, 상기 고무성분으로서 에틸렌비닐알코올 공중합체(EVOH), 스티렌-부타디엔 공중합체 등의 가운데 선택된 어느 하나 또는 둘 이상이 사용될 수 있으며, 상기 폴리에틸렌과 액상파라핀의 합계량 100중량부 당 고무성분이 10중량부 이하로 상기 폴리에틸렌계 수지에 첨가되고, 보다 바람직하게는 1~10중량부가 첨가되면 적당하다. 이 때, 고무성분의 첨가량이 10중량부를 초과하면 폴리에틸렌의 융점을 저하시키는 등의 문제가 발생하여 부적합하고, 또한 너무 적은 양을 첨가하면 본 발명의 특징인 자동온도 조절효과가 미약하여 부적합하게 된다.In addition, any one or two or more selected from among ethylene vinyl alcohol copolymer (EVOH) and styrene-butadiene copolymer may be used as the rubber component, and the rubber component is 10 weight per 100 parts by weight of the total amount of polyethylene and liquid paraffin. It is suitable when it is added to the said polyethylene-type resin below parts, More preferably, 1-10 weight part is added. At this time, if the amount of the rubber component is more than 10 parts by weight, problems such as lowering the melting point of polyethylene may occur, and if it is added too small, the thermostatic effect, which is a feature of the present invention, is weak and unsuitable. .
본 발명에 따른 폴리에틸렌계 수지의 자동온도조절 원리를 도 1을 이용하여 설명하면 다음과 같다.Referring to Figure 1 illustrates the thermostatic principle of the polyethylene resin according to the present invention.
도 1은 본 발명의 폴리에틸렌계 수지 조성물 중 폴리에틸렌과 액상파라핀의 합계량 당 폴리에틸렌의 중량비의 변화에 따른 공융점의 변화를 그래프로 나타낸 것이다.1 is a graph showing the change in the eutectic point according to the change in the weight ratio of polyethylene per total amount of polyethylene and liquid paraffin in the polyethylene resin composition of the present invention.
본 발명의 폴리에틸렌계 수지로 제조된 비닐하우스의 내부온도가 폴리에틸렌과 액상파라핀의 공융점 이하로 내려가 도 1의 b부분에 이르면 상기 수지가 결정화되어 불투명하게 된다. 그러나, 상기 수지가 결정화될 때 발생되는 발열반응열로 인하여 상기 수지의 온도가 상승하며, 그 온도가 공융점 이상까지 상승하여 도 1의 a부분에 이르면 상기 수지가 투명하게 된다. 이렇게 상기 수지가 투명하게 되면 햇빛이 투과하여 비닐하우스의 내부온도가 상승된다. 그러나, 계속해서 비닐하우스의 내부온도가 상승하면서 상기 수지의 결정화반응이 진행되어 결정화가 완료되면 상기 수지는 불투명하게 된다. 이렇게 상기 수지가 불투명하게 되면 햇빛이 차단되어 내부온도가 상승하는 것을 방지해준다.When the internal temperature of the vinyl house made of the polyethylene-based resin of the present invention falls below the eutectic point of the polyethylene and the liquid paraffin, and reaches the portion b of FIG. 1, the resin crystallizes and becomes opaque. However, due to the exothermic heat generated when the resin crystallizes, the temperature of the resin rises, and when the temperature rises above the eutectic point and reaches a part of FIG. 1, the resin becomes transparent. When the resin becomes transparent in this way, sunlight passes through and the internal temperature of the vinyl house is increased. However, the resin becomes opaque when the crystallization of the resin proceeds while the internal temperature of the vinyl house is increased. When the resin becomes opaque, sunlight is blocked to prevent the internal temperature from rising.
상기와 같은 원리를 이용하여 비닐하우스나 창문 등에 활용하면 본 발명에 따른 폴리에틸렌계 수지가 불투명할 때는 햇빛을 차단시켜 내부온도가 상승하는 것을 방지해주고, 내부온도가 떨어지면 결정화가 일어나 결정화에 따른 발열반응열로 상기 수지는 다시 투명하게 되어 햇빛을 투과시켜 내부온도를 상승시킨다.When the polyethylene-based resin according to the present invention is utilized, the polyethylene-based resin according to the present invention prevents the increase in the internal temperature by blocking sunlight when the polyethylene-based resin is opaque, and crystallization occurs when the internal temperature drops, thereby causing exothermic reaction heat. As a result, the resin becomes transparent again and transmits sunlight to increase the internal temperature.
요컨대, 본 발명에서는 폴리에틸렌과 액상파라핀의 공융점과 내부온도의 상관관계에 따라 결정화되는 현상, 즉 상기 수지가 투명하게 또는 불투명하게 변하는 성질을 이용하여 자동적으로 내부온도조절이 가능한 폴리에틸렌계 수지 필름을 제조하였다.In short, the present invention provides a polyethylene-based resin film capable of automatically controlling the internal temperature by using a phenomenon that crystallization according to the correlation between the eutectic point of polyethylene and liquid paraffin and the internal temperature, that is, the resin is transparent or opaque. Prepared.
이하, 본 발명을 실시예들에 의하여 좀 더 상세히 설명하는 바, 본 발명이 아래의 실시예로 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples.
[실시예 1]Example 1
분자량 180,000인 폴리에틸렌 950g, 액상파라핀 50g과, 고무성분으로 EVOH가 폴리에틸렌과 액상파라핀의 합량 100중량부 당 10중량부가 첨가된 후, 120℃로 유지된 용융혼련기에서 처리됨으로써 자동온도조절이 가능한 폴리에틸렌계 수지 조성물을 제조하였다. 상기 혼합물의 공융점은 30℃이다. 상기 혼합물을 2축연신 처리해서 필름을 제조하였다.950 g of polyethylene with a molecular weight of 180,000, 50 g of liquid paraffin and 10 parts by weight of EVOH as a rubber component are added to 100 parts by weight of polyethylene and liquid paraffin, and then processed in a melt kneader maintained at 120 ° C. The resin composition was prepared. The eutectic point of the mixture is 30 ° C. The mixture was biaxially stretched to prepare a film.
[실시예 2]Example 2
폴리에틸렌이 900g 첨가되고, 액상파라핀이 100g 첨가되는 것을 제외하고는 실시예 1과 동일한 조건 및 방법으로 실시하였다.900 g of polyethylene was added and 100 g of liquid paraffin was added to carry out the same conditions and methods as in Example 1.
[실시예 3]Example 3
폴리에틸렌이 850g 첨가되고, 액상파라핀이 150g 첨가되는 것을 제외하고는 실시예 1과 동일한 조건 및 방법으로 실시하였다.Except that 850g of polyethylene and 150g of liquid paraffin were added, the same process and procedure as in Example 1 were carried out.
[실시예 4]Example 4
폴리에틸렌이 800g 첨가되고, 액상파라핀이 200g 첨가되는 것을 제외하고는 실시예 1과 동일한 조건 및 방법으로 실시하였다.The same conditions and methods as in Example 1 were carried out except that 800 g of polyethylene was added and 200 g of liquid paraffin were added.
[비교예 1]Comparative Example 1
폴리에틸렌이 800g 첨가되고, 액상파라핀이 200g 첨가되며, 고무성분인 EVOH가 첨가되지 않는 것을 제외하고는 실시예 1과 동일한 조건 및 방법으로 실시하였다.The same conditions and methods as in Example 1 were carried out except that 800 g of polyethylene was added, 200 g of liquid paraffin was added, and EVOH, which is a rubber component, was not added.
[비교예 2]Comparative Example 2
폴리에틸렌이 1000g 첨가되고, 액상파라핀 및 고무성분인 EVOH가 첨가되지 않는 것을 제외하고는 실시예 1과 동일한 조건 및 방법으로 실시하였다.1000 g of polyethylene was added, and liquid paraffin and EVOH, which is a rubber component, were not added, and the same conditions and methods as in Example 1 were performed.
본 발명에 따라 실시예 1 내지 실시예 4의 조성으로 폴리에틸렌계 수지 조성물을 배합하고, 그 조성을 변화시키면서 비교하여 분석결과를 하기의 표 1에 나타내었다. 표 1에서 투명도는 30℃에서의 적외선 분광기로 측정한 광투과도이다.According to the present invention, a polyethylene-based resin composition was blended in the compositions of Examples 1 to 4, and the analysis results are shown in Table 1 below in comparison with changing the composition. In Table 1, transparency is light transmittance measured with an infrared spectrometer at 30 ° C.
[표 1]TABLE 1
상기 표 1에서 알 수 있듯이, 본 발명에 따른 폴리에틸렌계 수지는 자동적으로 온도조절이 가능할 뿐만 아니라, 그 투명도가 우수함을 알 수 있다.As can be seen in Table 1, the polyethylene-based resin according to the present invention can be seen that not only can automatically control the temperature, but also its transparency.
본 발명에 의하면 폴리에틸렌계 수지의 투명성을 유지하면서 그 자체로 자동온도조절이 가능하여 상기 수지로 제조된 비닐하우스 내부의 온도가 주야로 일정하게 유지되는 폴리에틸렌계 수지 필름이 제공된다.According to the present invention, a polyethylene-based resin film is provided in which a temperature inside the vinyl house made of the resin is kept constant day and night while maintaining the transparency of the polyethylene-based resin.
또한, 자동적으로 온도조절이 가능한 폴리에틸렌계 필름이 제조됨으로써 일일이 온도를 체크하여 기온이 내려가는 야간에는 비닐하우스의 내부온도를 보온하기 위하여 헝겊이나 짚으로 덮는 조작을 하고, 기온이 상승하는 주간에는 배출구(파이프)를 설치하거나 비닐에 구멍을 천공하여 통풍시키는 불편함이 해소되었다.In addition, a polyethylene-based film that can automatically adjust temperature is manufactured so that the temperature is checked at a time and the operation is covered with a cloth or a straw to keep the internal temperature of the plastic house at night when the temperature decreases. The inconvenience of installing a pipe) or punching holes in the vinyl has been eliminated.
농작물이 성장하는데 알맞은 온도를 유지할 수 있게 되어 농작물 성장에 있어서 바람직하고, 또한 본 발명에 따른 수제로 제조된 비닐하우스 내부에서 작업을 할 경우 온도에 의한 각종 질환이 없어지므로 작업환경도 개선되었다.Since it is possible to maintain a suitable temperature for growing crops is preferable for growing crops, and also when working in a plastic house made of handmade according to the present invention, various diseases caused by temperature are eliminated, thereby improving the working environment.
Claims (2)
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| KR1019970017530A KR100199054B1 (en) | 1997-05-07 | 1997-05-07 | Auto-temperature controllable polyethylene resin film |
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