WO2017171156A1 - Method for manufacturing polylactic acid container having improved heat resistance, polylactic acid container manufactured by manufacturing method, and apparatus for manufacturing polylactic acid container - Google Patents

Method for manufacturing polylactic acid container having improved heat resistance, polylactic acid container manufactured by manufacturing method, and apparatus for manufacturing polylactic acid container Download PDF

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Publication number
WO2017171156A1
WO2017171156A1 PCT/KR2016/009636 KR2016009636W WO2017171156A1 WO 2017171156 A1 WO2017171156 A1 WO 2017171156A1 KR 2016009636 W KR2016009636 W KR 2016009636W WO 2017171156 A1 WO2017171156 A1 WO 2017171156A1
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Prior art keywords
polylactic acid
temperature
preheating
mold member
container
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PCT/KR2016/009636
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French (fr)
Korean (ko)
Inventor
김성수
김현선
김현철
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김성수
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Publication of WO2017171156A1 publication Critical patent/WO2017171156A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/46—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D22/00—Producing hollow articles

Definitions

  • the present invention relates to a method for producing a polylactic acid container having improved heat resistance, a polylactic acid container produced by the manufacturing method, and an apparatus for producing a polylactic acid container.
  • Polylactic acid is an eco-friendly resin made from raw materials derived from corn starch.It is a safe material because it does not detect harmful substances such as environmental hormones and heavy metals even when it contains hot food, or when infants bite or suck it. In use, it has the same characteristics as ordinary plastics but is 100% biodegradable by microorganisms when disposed.
  • Polylactic acid as described above is a biodegradable raw material, the price is relatively high, as well as has the advantage that can be used in a variety of applications.
  • the polylactic acid container is molded into such a polylactic acid to contain food and the like, which can be presented as an example of such a polylactic acid container is disclosed in Korean Patent Publication No. 10-2011-0045588 (published: 2011.05.04., Name of the invention: Polylactic acid-based sheet having excellent heat resistance and a container using the same).
  • a problem that frequently occurs when manufacturing containers with polylactic acid film is that polylactic acid has a relatively low heat deformation temperature, so that the polylactic acid container is thermally deformed during the distribution and storage of the polylactic acid container, and the contents contained therein are damaged. Or a phenomenon that is damaged.
  • a polylactic acid film was put in a mold to form the container in a required shape, and then the process of crystallizing the molded polylactic acid container was separately performed.
  • the conventional production method of the polylactic acid container as a post-process of forming the polylactic acid film through a mold operation in a required form, the operation of putting the molded polylactic acid container into a heated chamber and crystallizing separately is performed separately. Therefore, the molded polylactic acid container had to be moved to a heated chamber, put into a heated chamber, and then removed and moved again after crystallization. Therefore, the production efficiency of the polylactic acid container was greatly reduced. there was.
  • the present invention provides a method for producing a polylactic acid container having improved heat resistance, wherein the polylactic acid container is manufactured by the manufacturing method, while the crystallization process is performed to improve the heat resistance of the polylactic acid container. It is an object of the present invention to provide an apparatus for producing a lactic acid container.
  • Polylactic acid container manufacturing apparatus to produce a polylactic acid container
  • a polylactic acid film supply member including a polylactic acid and supplying a polylactic acid film formed in a film form;
  • a preheating member for preheating the polylactic acid film supplied by the polylactic acid film supply member;
  • a main heating member which heats the preheated polylactic acid film for molding through the preheating member;
  • a mold member for molding the heated polylactic acid film through the present heating member into a required container form of the polylactic acid container;
  • a temperature maintaining member for maintaining the temperature of the mold member at a required molding crystallization temperature.
  • the temperature of the mold member is maintained at the required molding crystallization temperature by the temperature holding member so that the polylactic acid film introduced for molding into the mold member is crystallized together with molding in the mold member. It is done.
  • a method for manufacturing a polylactic acid container having improved heat resistance includes: (a) forming a polylactic acid film extruded in a film form by mixing a polylactic acid and an additive; (b) preheating the polylactic acid film formed in step (a) within a range of 150 to 250 ° C. in a preheating member; And (c) introducing the polylactic acid film preheated in the step (b) into a mold member to crystallize the polylactic acid film into a container shape required by the mold member.
  • the polylactic acid container comprises the steps of (a) forming a polylactic acid film extruded in a film form by mixing a polylactic acid and an additive, and (b) preheating the polylactic acid film formed in the step (a). Preheating in the range of 150 to 250 ° C., and (c) inserting the polylactic acid film preheated in the step (b) into a mold member to form the polylactic acid film in a container form required by the mold member. It is manufactured by a polylactic acid container manufacturing method comprising the step of crystallizing together, characterized in that the completion of the crystallization simultaneously with the molding in the mold member.
  • a method for producing a polylactic acid container having improved heat resistance a polylactic acid container produced by the manufacturing method, and a polylactic acid container manufacturing apparatus, including a polylactic acid film supply member, a preheating member, and the present heating member.
  • the polylactic acid container is manufactured by using a polylactic acid container manufacturing apparatus including a mold member and a temperature holding member, whereby the polylactic acid film introduced for molding into the mold member can be crystallized together with molding in the mold member.
  • the polylactic acid container since the polylactic acid container is molded in the mold member and there is no need to undergo a post-crystallization crystallization process in a separate device, the polylactic acid container may be subjected to a crystallization process to improve heat resistance of the polylactic acid container. There is an effect that the manufacturing efficiency can be improved.
  • FIG. 1 is a view schematically showing the configuration of a polylactic acid container manufacturing apparatus according to an embodiment of the present invention.
  • Figure 2 is a view showing a state in which the polylactic acid film is inserted for molding in the mold member constituting the polylactic acid container manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 3 is an enlarged view of a portion A shown in FIG.
  • Figure 4 is a view showing a state in which a polylactic acid film is molded by the mold member shown in FIG.
  • Figure 4 is a view showing a state in which the polylactic acid container is molded by the mold member shown in FIG.
  • Figure 6 is a view showing the present heating member constituting the polylactic acid container manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 1 is a view schematically showing the configuration of a polylactic acid container manufacturing apparatus according to an embodiment of the present invention
  • Figure 2 is a polylactic acid film on the mold member constituting the polylactic acid container manufacturing apparatus according to an embodiment of the present invention
  • 3 is an enlarged view of a portion A shown in FIG. 2
  • FIG. 4 is a view showing a polylactic acid film formed by the mold member shown in FIG. 2.
  • 4 is a view showing a state in which the polylactic acid container is molded by the mold member shown in FIG. 4
  • FIG. 6 is a view showing the present heating member constituting the polylactic acid container manufacturing apparatus according to an embodiment of the present invention.
  • the polylactic acid container manufacturing apparatus 100 is to manufacture a polylactic acid container 20, the polylactic acid film supply member 101 and the preheating member 110 And the present heating member 130, the mold member 140, and the temperature holding member 150.
  • the polylactic acid film supply member 101 supplies a polylactic acid film 10 including polylactic acid and formed in the form of a film, and the polylactic acid film 10 is a roller type polylactic acid film supply member 101. It can be supplied while being rolled up in a roll shape and released from the outermost part.
  • the polylactic acid film 10 may be formed by mixing an additive in the polylactic acid and extruding it in the form of a film.
  • the additive added to the polylactic acid at least one of talc, filler, and calcium carbonate may be presented.
  • the preheating member 110 preheats the polylactic acid film 10 supplied by the polylactic acid film supply member 101.
  • the preheating member 110 is arranged in a zigzag shape up and down along the advancing direction of the polylactic acid film 10 so that the polylactic acid film 10 is moved in a zigzag shape.
  • a preheat heater 115 which transmits radiant heat to the polylactic acid film 10 which is disposed below the preheat transfer roller 111 and generates heat to move along the preheat movement roller 111.
  • the main heating member 130 heats the preheated polylactic acid film 10 through the preheating member 110 for molding.
  • the main heating member 130 includes main heating heaters 131, 132, and 133 that are gradually subdivided gradually along the advancing direction of the polylactic acid film 10.
  • a first bone heater 131 capable of heating the entire width direction of the polylactic acid film 10 integrally at the beginning of the main heating member 130, and
  • the second main heating body 132 and the second main heating body 132 that can be heated by dividing the width direction of the polylactic acid film 10 by the first main heating body 131 in three equal parts. It may be composed of a third main heater 133 that can be heated by dividing the width direction of the polylactic acid film 10 into six equal parts.
  • the polylactic acid film 10 may be gradually subdivided and heated by the present heating heaters 131, 132, and 133, which are gradually subdivided while moving along the traveling direction thereof.
  • the lactic acid film 10 can be accurately molded in the mold member 140.
  • the mold member 140 molds the polylactic acid film 10 heated through the main heating member 130 into a required container shape of the polylactic acid container 20.
  • the mold member 140 may include a lower mold body 142 for forming a required bottom shape of the polylactic acid container 20, and an upper mold body for molding a desired top shape of the polylactic acid container 20.
  • 141 and a plurality of the plurality of lower mold bodies 142 and the upper mold bodies 141 are arranged in an interpolated manner to apply heat applied by the temperature maintaining member 150 to the mold members 140.
  • a heat transfer body 145 that is transferred for shaping and crystallization as a whole.
  • Reference numeral 121 denotes the lower mold body 142 and the upper mold body 141 to be in close contact with each other, and then to be separated from each other in order to allow the mold member 140 to mold by molding the polylactic acid film 10. Mold moving means.
  • the mold moving means 121 may be presented as a hydraulic cylinder, and the piston 122 may be connected to the upper mold body 141.
  • the mold movement means 121 is presented as a hydraulic cylinder is an example, it is also exemplary that the piston 122 is connected to the upper mold body 141, the piston 122 is the lower gold It may also be connected to the body 142.
  • the heat transfer body 145 is installed on at least one of the upper mold body 141 and the lower mold body 142, and a plurality of heat transfer body 145 is installed in a grid shape or the like so that the mold member 140 is uniformly overall. Allow to be heated.
  • the plurality of heat transfer members 145 may be disposed in the mold member 140 to be spaced apart from each other, and the heat transfer bodies 145 may be disposed in the mold.
  • Each is disposed at the same depth from the surface of the member 140. That is, as shown in Figure 3, the surface of the mold member 140 will have a different height, corresponding to this different height, each of the heat transfer body 145 is the same from the surface of the mold member 140 It is disposed so as to be deep, and is disposed in the same shape as the height of the surface of the mold member 140 as a whole.
  • the surface of the mold member 140 can be uniformly heated, so that the molding and crystallization in the mold member 140 can be homogenized as a whole.
  • the temperature maintaining member 150 maintains the temperature of the mold member 140 at the required molding crystallization temperature.
  • the temperature of the mold member 140 is maintained by the temperature holding member 150 at the required molding crystallization temperature, whereby the polylactic acid film 10 introduced into the mold member 140 for molding is formed into the mold. It becomes possible to crystallize together with molding in the member 140, thereby eliminating the need for the polylactic acid container 20 to be molded in the mold member 140 and then undergoing a crystallization process in a separate apparatus.
  • Molding crystallization temperature for the simultaneous crystallization of the polylactic acid film 10 may be determined while changing the temperature of the mold member 140 in multiple stages.
  • the temperature of the mold member 140 is maintained in a range of 50 to 60 ° C. which is the glass transition temperature of the polylactic acid film 10, and in the second step of molding crystallization, the mold member ( 140 is maintained at a temperature in the range of 70 to 80 ° C, and in the third step of forming crystallization, the temperature of the mold member 140 is 90 to a temperature between the glass transition temperature and the melting point of the polylactic acid film 10. While maintaining the temperature in a range of 100 ° C., the molding crystallization temperature, which is a temperature optimized for molding and crystallization of the polylactic acid film 10, can be determined, and the predetermined molding crystallization temperature is determined by the temperature maintaining member 150.
  • the continuous molding process of the polylactic acid container 20 is performed in the mold member 140 under the maintained environment.
  • the temperature maintaining member 150 may be to circulate the circulating fluid to the heat transfer body 145 by heating a circulating fluid such as oil, in which case the heat transfer body 145 is the temperature maintaining member 150. It becomes a pipe for circulating the circulating fluid circulated in. In this case, the heat transfer means 151 connecting the temperature maintaining member 150 and the circulator becomes a flow pipe of the circulating fluid.
  • the temperature maintaining member 150 may function as a power supply and a control unit for supplying and controlling electricity, and in this case, the heat transfer member 145 may be powered by electricity supplied from the temperature maintaining member 150. It becomes a heating wire that generates heat.
  • the heat transfer means 151 connecting the temperature maintaining member 150 and the circulator becomes a cable for electricity supply.
  • the polylactic acid container manufacturing apparatus 100 may further include a heat insulation sealing member 125.
  • the heat insulating sealing member 125 is to heat-sealing the mold member 140 to the outside so that the temperature of the mold member 140, which is heated and maintained by the temperature holding member 150 can be prevented. .
  • the insulation sealing member 125 may surround the mold member 140 to form an insulation space with the outside, and may perform insulation sealing in such a manner that insulation of the inner wall is made such that a heat shield is formed on the inner wall.
  • step (a) a step of forming a polylactic acid film 10 extruded in the form of a film by mixing polylactic acid and an additive is performed (step (a)).
  • the additive added to the polylactic acid in the step (a) may be at least one of talc, filler, calcium carbonate, the additive may be added 1 to 5 parts by weight based on 100 parts by weight of the polylactic acid have.
  • the polylactic acid film 10 formed as described above is wound around the polylactic acid film supply member 101 and then supplied.
  • the step (b) is a preheating first step in which preheating is performed while maintaining the temperature of the preheating member 110 in a range of 150 to 160 ° C., and the temperature of the preheating member 110 which has undergone the preheating first step.
  • Preheating step 2 to preheat is carried out while maintaining the temperature in the range of 190 to 200 °C, and preheating is carried out while maintaining the temperature of the preheat member 110 subjected to the preheating second step to 220 °C
  • a preheating fifth step in which preheating is performed while maintaining the temperature of the mixture at 240 ° C.
  • step (b) the polylactic acid film 10 preheated in the step (b) is introduced into the mold member 140 to mold the polylactic acid film 10 into a container shape required by the mold member 140. Crystallization is carried out together (step (c)).
  • the temperature of the mold member 140 is maintained in a range of 50 to 60 ° C., which is the glass transition temperature of the polylactic acid film 10, and the second step of forming crystallization.
  • the temperature of the mold member 140 in the range of 70 to 80 °C, the temperature of the mold member 140 in the third step of molding crystallization between the glass transition temperature and the melting point of the polylactic acid film 10 While maintaining the temperature rising in the range of 90 to 100 °C, the molding crystallization temperature which is a temperature optimized for molding and crystallization of the polylactic acid film 10 can be determined, the predetermined molding crystallization temperature is the temperature holding member As the continuous molding process of the polylactic acid container 20 is performed in the mold member 140 under the environment maintained by 150, mass production of the polylactic acid container 20 is performed.
  • the first molding crystallization step, the second molding crystallization step and the third molding crystallization step may be performed for 1 to 10 seconds, respectively.
  • the polylactic acid container 20 manufacturing method may further include a trimming step (step (d)) of removing the scrap of the polylactic acid container 20 formed and crystallized in the step (c).
  • Scrap is formed on the outside of the polylactic acid container 20 molded and crystallized in step (c), and the scrap is removed while passing through the scrap removing member 160 having a blade or the like.
  • the polylactic acid film 10 is formed by mixing the polylactic acid and the additive and then extruded in the form of a film (step (a)), and the (l) Preheating the polylactic acid film 10 in the preheating member 110 within a range of 150 to 250 ° C (step (b)), and the polylactic acid film 10 preheated in the step (b).
  • a polylactic acid container 20 manufacturing method comprising the step of (c) crystallizing the polylactic acid film 10 in the form of a container required by the mold member 140, and the crystallization. It is manufactured by, and completed the crystallization at the same time as the molding in the mold member 140.
  • the polylactic acid container manufacturing apparatus including the polylactic acid film supply member 101, the preheat member 110, the main heating member 130, the mold member 140, and the temperature holding member 150.
  • the polylactic acid container 20 As the polylactic acid container 20 is manufactured using the 100, the polylactic acid film 10 introduced for molding into the mold member 140 may be crystallized together with the molding in the mold member 140. Therefore, since the polylactic acid container 20 is molded in the mold member 140 and does not need to undergo a post-crystallization crystallization process in a separate device, a crystallization process is performed to improve heat resistance of the polylactic acid container 20. While being performed, the production efficiency of the polylactic acid container 20 can be improved.
  • the polylactic acid container manufacturing method improved heat resistance
  • the polylactic acid container produced by the manufacturing method and the polylactic acid container manufacturing apparatus according to an aspect of the present invention while the crystallization process is performed to improve the heat resistance of the polylactic acid container, Since the production efficiency of the polylactic acid container can be improved, it is said that the industrial applicability is high.

Abstract

Disclosed are a method for manufacturing a polylactic acid container having improved heat resistance, a polylactic acid container manufactured by the manufacturing method, and an apparatus for manufacturing the polylactic acid container, which are characterized in that a polylactic acid film, which enters a mold member so as to mold the same, is crystallized in a mold member while being molded, and thus there is an advantage of a polylactic acid container not needing to undergo a crystallization process, which is a post-process, in a separate device after being molded in the mold member.

Description

내열성이 향상된 폴리유산 용기 제조방법, 상기 제조방법에 의해 제작된 폴리유산 용기 및 상기 폴리유산 용기 제조장치Polylactic acid container manufacturing method with improved heat resistance, polylactic acid container produced by the manufacturing method and the polylactic acid container manufacturing apparatus
본 발명은 내열성이 향상된 폴리유산 용기 제조방법, 상기 제조방법에 의해 제작된 폴리유산 용기 및 상기 폴리유산 용기 제조장치에 관한 것이다.The present invention relates to a method for producing a polylactic acid container having improved heat resistance, a polylactic acid container produced by the manufacturing method, and an apparatus for producing a polylactic acid container.
폴리유산(PLA, polylactic acid)은 옥수수의 전분에서 추출한 원료로 만든 친환경 수지로서, 뜨거운 음식을 담거나, 유아가 입으로 물거나 빨아도 환경호르몬은 물론, 중금속 등 유해 물질이 검출되지 않아 안전한 재질이고, 사용 중에는 일반 플라스틱과 동등한 특징을 가지지만 폐기 시 미생물에 의해 100% 생분해되는 재질이다.Polylactic acid (PLA) is an eco-friendly resin made from raw materials derived from corn starch.It is a safe material because it does not detect harmful substances such as environmental hormones and heavy metals even when it contains hot food, or when infants bite or suck it. In use, it has the same characteristics as ordinary plastics but is 100% biodegradable by microorganisms when disposed.
위와 같은 폴리유산은 생분해성 원료이면서도, 가격이 상대적으로 높지 않음은 물론, 다양한 응용품에 사용 가능한 장점이 있다.Polylactic acid as described above is a biodegradable raw material, the price is relatively high, as well as has the advantage that can be used in a variety of applications.
이러한 폴리유산으로 성형되어 음식물 등을 담는 것이 폴리유산 용기로, 이러한 폴리유산 용기의 예로 제시될 수 있는 것이 대한민국공개특허 제 10-2011-0045588호(공개일자: 2011.05.04., 발명의 명칭: 내열성이 우수한 폴리유산계 시트 및 이를 이용한 용기)의 그 것이다.The polylactic acid container is molded into such a polylactic acid to contain food and the like, which can be presented as an example of such a polylactic acid container is disclosed in Korean Patent Publication No. 10-2011-0045588 (published: 2011.05.04., Name of the invention: Polylactic acid-based sheet having excellent heat resistance and a container using the same).
폴리유산을 용융하여 호퍼 및 금형을 이용하여 폴리유산 용기를 찍어내는 방식도 있으나, 이러한 방식은 작업 시간이 너무 많이 소요되는 등 작업 효율이 떨어지기 때문에, 생산 효율을 높이기 위하여 필름 형태로 제조된 폴리유산 필름을 금형을 이용하여 성형하는 방식으로 폴리유산 용기가 제조되고 있다.There is also a method of melting polylactic acid and dipping a polylactic acid container using a hopper and a mold. However, this method is a poly-type film made in the form of a film in order to increase the production efficiency since the working efficiency is inferior, such as taking too much time. Polylactic acid containers are manufactured by molding a lactic acid film using a mold.
폴리유산 필름으로 용기를 제조할 때 빈번하게 발생되는 문제가 폴리유산이 열변형 온도가 상대적으로 낮아 폴리유산 용기의 유통 및 보관 단계에서 폴리유산 용기가 열변형되면서, 내부에 수용되어 있던 내용물이 파손 또는 훼손되는 현상이었다.A problem that frequently occurs when manufacturing containers with polylactic acid film is that polylactic acid has a relatively low heat deformation temperature, so that the polylactic acid container is thermally deformed during the distribution and storage of the polylactic acid container, and the contents contained therein are damaged. Or a phenomenon that is damaged.
이러한 문제를 해결하고, 폴리유산 용기의 내열성 향상을 위하여, 폴리유산 필름을 금형에 넣어 용기를 요구되는 형태로 성형한 다음 그 성형된 폴리유산 용기를 결정화시키는 공정을 별도로 수행해 주었다.In order to solve this problem and to improve the heat resistance of the polylactic acid container, a polylactic acid film was put in a mold to form the container in a required shape, and then the process of crystallizing the molded polylactic acid container was separately performed.
그러나, 종래의 폴리유산 용기의 제조 방식에 의하면, 폴리유산 필름을 요구되는 형태로 금형 작업을 통해 성형하는 작업의 후 공정으로, 가열된 챔버에 그 성형된 폴리유산 용기를 넣어 결정화시키는 작업이 별도로 수행되어져야 했고, 그에 따라 성형된 폴리유산 용기를 가열된 챔버로 이동시켜 가열된 챔버에 넣어준 후 결정화된 이후에 다시 꺼내어 이동시켜 줘야 했고, 그에 따라 폴리유산 용기의 제작 효율이 크게 떨어지는 문제가 있었다.However, according to the conventional production method of the polylactic acid container, as a post-process of forming the polylactic acid film through a mold operation in a required form, the operation of putting the molded polylactic acid container into a heated chamber and crystallizing separately is performed separately. Therefore, the molded polylactic acid container had to be moved to a heated chamber, put into a heated chamber, and then removed and moved again after crystallization. Therefore, the production efficiency of the polylactic acid container was greatly reduced. there was.
본 발명은 폴리유산 용기의 내열성 향상을 위해 결정화 공정이 수행되면서도, 폴리유산 용기의 제조 효율이 향상될 수 있는 내열성이 향상된 폴리유산 용기 제조방법, 상기 제조방법에 의해 제작된 폴리유산 용기 및 상기 폴리유산 용기 제조장치를 제공하는 것을 일 목적으로 한다.The present invention provides a method for producing a polylactic acid container having improved heat resistance, wherein the polylactic acid container is manufactured by the manufacturing method, while the crystallization process is performed to improve the heat resistance of the polylactic acid container. It is an object of the present invention to provide an apparatus for producing a lactic acid container.
본 발명의 일 측면에 따른 폴리유산 용기 제조장치는 폴리유산 용기를 제조하는 것으로서,Polylactic acid container manufacturing apparatus according to an aspect of the present invention to produce a polylactic acid container,
폴리유산을 포함하고 필름 형태로 형성된 폴리유산 필름을 공급하는 폴리유산 필름 공급 부재; 상기 폴리유산 필름 공급 부재에 의해 공급되는 상기 폴리유산 필름을 예열시키는 예열 부재; 상기 예열 부재를 경유하며 예열된 상기 폴리유산 필름을 성형을 위해 가열하는 본 가열 부재; 상기 본 가열 부재를 경유하며 가열된 상기 폴리유산 필름을 상기 폴리유산 용기의 요구되는 용기 형태로 성형하는 금형 부재; 및 상기 금형 부재의 온도를 요구되는 성형 결정화 온도로 유지시켜 주는 온도 유지 부재;를 포함하고,A polylactic acid film supply member including a polylactic acid and supplying a polylactic acid film formed in a film form; A preheating member for preheating the polylactic acid film supplied by the polylactic acid film supply member; A main heating member which heats the preheated polylactic acid film for molding through the preheating member; A mold member for molding the heated polylactic acid film through the present heating member into a required container form of the polylactic acid container; And a temperature maintaining member for maintaining the temperature of the mold member at a required molding crystallization temperature.
상기 온도 유지 부재에 의해 상기 금형 부재의 온도가 상기 요구되는 성형 결정화 온도로 유지됨으로써, 상기 금형 부재로 성형을 위해 인입된 상기 폴리유산 필름이 상기 금형 부재에서 성형과 함께 결정화(crystallization)되는 것을 특징으로 한다.Wherein the temperature of the mold member is maintained at the required molding crystallization temperature by the temperature holding member so that the polylactic acid film introduced for molding into the mold member is crystallized together with molding in the mold member. It is done.
본 발명의 일 측면에 따른 내열성이 향상된 폴리유산 용기 제조방법은 (a) 폴리유산과 첨가제를 혼합하여 필름 형태로 압출된 폴리유산 필름 형성 단계; (b) 상기 (a)단계에서 형성된 상기 폴리유산 필름을 예열 부재에서 150 내지 250℃ 범위 내에서 예열시키는 단계; 및 (c) 상기 (b)단계에서 예열된 상기 폴리유산 필름을 금형 부재에 인입시켜, 상기 폴리유산 필름을 상기 금형 부재에서 요구되는 용기 형태로 성형함과 함께 결정화시키는 단계;를 포함한다.According to an aspect of the present invention, a method for manufacturing a polylactic acid container having improved heat resistance includes: (a) forming a polylactic acid film extruded in a film form by mixing a polylactic acid and an additive; (b) preheating the polylactic acid film formed in step (a) within a range of 150 to 250 ° C. in a preheating member; And (c) introducing the polylactic acid film preheated in the step (b) into a mold member to crystallize the polylactic acid film into a container shape required by the mold member.
본 발명의 일 측면에 따른 폴리유산 용기는 (a) 폴리유산과 첨가제를 혼합하여 필름 형태로 압출된 폴리유산 필름 형성 단계와, (b) 상기 (a)단계에서 형성된 상기 폴리유산 필름을 예열 부재에서 150 내지 250℃ 범위 내에서 예열시키는 단계와, (c) 상기 (b)단계에서 예열된 상기 폴리유산 필름을 금형 부재에 인입시켜, 상기 폴리유산 필름을 상기 금형 부재에서 요구되는 용기 형태로 성형함과 함께 결정화시키는 단계를 포함하는 폴리유산 용기 제조방법에 의해 제조되어, 상기 금형 부재에서 성형과 동시에 결정화까지 완료된 것을 특징으로 한다.The polylactic acid container according to an aspect of the present invention comprises the steps of (a) forming a polylactic acid film extruded in a film form by mixing a polylactic acid and an additive, and (b) preheating the polylactic acid film formed in the step (a). Preheating in the range of 150 to 250 ° C., and (c) inserting the polylactic acid film preheated in the step (b) into a mold member to form the polylactic acid film in a container form required by the mold member. It is manufactured by a polylactic acid container manufacturing method comprising the step of crystallizing together, characterized in that the completion of the crystallization simultaneously with the molding in the mold member.
본 발명의 일 측면에 따른 내열성이 향상된 폴리유산 용기 제조방법, 상기 제조방법에 의해 제작된 폴리유산 용기 및 상기 폴리유산 용기 제조장치에 의하면, 폴리유산 필름 공급 부재와, 예열 부재와, 본 가열 부재와, 금형부재와, 온도 유지 부재를 포함하는 폴리유산 용기 제조장치를 이용하여 폴리유산 용기가 제조됨으로써, 상기 금형 부재로 성형을 위해 인입된 폴리유산 필름이 상기 금형 부재에서 성형과 함께 결정화될 수 있게 되고, 그에 따라 상기 폴리유산 용기가 상기 금형 부재에서 성형된 다음 별도 장치에서 후공정인 결정화 공정을 거칠 필요가 없게 되므로, 폴리유산 용기의 내열성 향상을 위해 결정화 공정이 수행되면서도, 폴리유산 용기의 제조 효율이 향상될 수 있게 되는 효과가 있다.According to one aspect of the present invention, there is provided a method for producing a polylactic acid container having improved heat resistance, a polylactic acid container produced by the manufacturing method, and a polylactic acid container manufacturing apparatus, including a polylactic acid film supply member, a preheating member, and the present heating member. The polylactic acid container is manufactured by using a polylactic acid container manufacturing apparatus including a mold member and a temperature holding member, whereby the polylactic acid film introduced for molding into the mold member can be crystallized together with molding in the mold member. Therefore, since the polylactic acid container is molded in the mold member and there is no need to undergo a post-crystallization crystallization process in a separate device, the polylactic acid container may be subjected to a crystallization process to improve heat resistance of the polylactic acid container. There is an effect that the manufacturing efficiency can be improved.
도 1은 본 발명의 일 실시예에 따른 폴리유산 용기 제조장치의 구성을 개략적으로 보이는 도면.1 is a view schematically showing the configuration of a polylactic acid container manufacturing apparatus according to an embodiment of the present invention.
도 2는 본 발명의 일 실시예에 따른 폴리유산 용기 제조장치를 구성하는 금형 부재에 폴리유산 필름이 성형을 위해 인입된 모습을 보이는 도면.Figure 2 is a view showing a state in which the polylactic acid film is inserted for molding in the mold member constituting the polylactic acid container manufacturing apparatus according to an embodiment of the present invention.
도 3은 도 2에 도시된 A부분에 대한 확대도.3 is an enlarged view of a portion A shown in FIG.
도 4는 도 2에 도시된 금형 부재에 의해 폴리유산 필름이 성형되는 모습을 보이는 도면.Figure 4 is a view showing a state in which a polylactic acid film is molded by the mold member shown in FIG.
도 4는 도 4에 도시된 금형 부재에 의해 폴리유산 용기가 성형된 모습을 보이는 도면.Figure 4 is a view showing a state in which the polylactic acid container is molded by the mold member shown in FIG.
도 6은 본 발명의 일 실시예에 따른 폴리유산 용기 제조장치를 구성하는 본 가열 부재를 보이는 도면.Figure 6 is a view showing the present heating member constituting the polylactic acid container manufacturing apparatus according to an embodiment of the present invention.
이하에서는 도면을 참조하여 본 발명의 일 실시예에 따른 내열성이 향상된 폴리유산 용기 제조방법, 상기 제조방법에 의해 제작된 폴리유산 용기 및 상기 폴리유산 용기 제조장치에 대하여 설명한다.Hereinafter, a polylactic acid container manufacturing method having improved heat resistance, a polylactic acid container manufactured by the manufacturing method, and the polylactic acid container manufacturing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
도 1은 본 발명의 일 실시예에 따른 폴리유산 용기 제조장치의 구성을 개략적으로 보이는 도면이고, 도 2는 본 발명의 일 실시예에 따른 폴리유산 용기 제조장치를 구성하는 금형 부재에 폴리유산 필름이 성형을 위해 인입된 모습을 보이는 도면이고, 도 3은 도 2에 도시된 A부분에 대한 확대도이고, 도 4는 도 2에 도시된 금형 부재에 의해 폴리유산 필름이 성형되는 모습을 보이는 도면이고, 도 4는 도 4에 도시된 금형 부재에 의해 폴리유산 용기가 성형된 모습을 보이는 도면이고, 도 6은 본 발명의 일 실시예에 따른 폴리유산 용기 제조장치를 구성하는 본 가열 부재를 보이는 도면이다.1 is a view schematically showing the configuration of a polylactic acid container manufacturing apparatus according to an embodiment of the present invention, Figure 2 is a polylactic acid film on the mold member constituting the polylactic acid container manufacturing apparatus according to an embodiment of the present invention 3 is an enlarged view of a portion A shown in FIG. 2, and FIG. 4 is a view showing a polylactic acid film formed by the mold member shown in FIG. 2. 4 is a view showing a state in which the polylactic acid container is molded by the mold member shown in FIG. 4, and FIG. 6 is a view showing the present heating member constituting the polylactic acid container manufacturing apparatus according to an embodiment of the present invention. Drawing.
도 1 내지 도 6을 함께 참조하면, 본 실시예에 따른 폴리유산 용기 제조장치(100)는 폴리유산 용기(20)를 제조하는 것으로서, 폴리유산 필름 공급 부재(101)와, 예열 부재(110)와, 본 가열 부재(130)와, 금형 부재(140)와, 온도 유지 부재(150)를 포함한다.1 to 6 together, the polylactic acid container manufacturing apparatus 100 according to the present embodiment is to manufacture a polylactic acid container 20, the polylactic acid film supply member 101 and the preheating member 110 And the present heating member 130, the mold member 140, and the temperature holding member 150.
상기 폴리유산 필름 공급 부재(101)는 폴리유산을 포함하고 필름 형태로 형성된 폴리유산 필름(10)을 공급하는 것으로, 상기 폴리유산 필름(10)이 롤러 형태의 상기 폴리유산 필름 공급 부재(101)에 롤(roll) 형태로 감겨 있다가 최외곽부터 풀리면서 공급될 수 있다.The polylactic acid film supply member 101 supplies a polylactic acid film 10 including polylactic acid and formed in the form of a film, and the polylactic acid film 10 is a roller type polylactic acid film supply member 101. It can be supplied while being rolled up in a roll shape and released from the outermost part.
여기서, 상기 폴리유산 필름(10)은 상기 폴리유산에 첨가제가 혼합되어 필름 형태로 압출됨으로써 형성될 수 있는 것이다. 상기 폴리유산에 첨가되는 상기 첨가제로는 활석, 충진재, 탄산칼슘 중 적어도 하나가 제시될 수 있다.Here, the polylactic acid film 10 may be formed by mixing an additive in the polylactic acid and extruding it in the form of a film. As the additive added to the polylactic acid, at least one of talc, filler, and calcium carbonate may be presented.
상기 예열 부재(110)는 상기 폴리유산 필름 공급 부재(101)에 의해 공급되는 상기 폴리유산 필름(10)을 예열시키는 것이다.The preheating member 110 preheats the polylactic acid film 10 supplied by the polylactic acid film supply member 101.
상세히, 상기 예열 부재(110)는 상기 폴리유산 필름(10)의 진행 방향을 따라 상하로 지그재그(zigzag) 형태로 배열되어 상기 폴리유산 필름(10)이 지그재그 형태로 이동되도록 하는 복수 개의 예열 이동 롤러(111)와, 상기 예열 이동 롤러(111)의 하측에 배치되어 발열됨으로써 상기 예열 이동 롤러(111)를 따라 이동되는 상기 폴리유산 필름(10)에 복사열을 전해주는 예열 히터(115)를 포함한다.In detail, the preheating member 110 is arranged in a zigzag shape up and down along the advancing direction of the polylactic acid film 10 so that the polylactic acid film 10 is moved in a zigzag shape. And a preheat heater 115 which transmits radiant heat to the polylactic acid film 10 which is disposed below the preheat transfer roller 111 and generates heat to move along the preheat movement roller 111. .
상기 본 가열 부재(130)는 상기 예열 부재(110)를 경유하며 예열된 상기 폴리유산 필름(10)을 성형을 위해 가열하는 것이다.The main heating member 130 heats the preheated polylactic acid film 10 through the preheating member 110 for molding.
상기 본 가열 부재(130)는 상기 폴리유산 필름(10)의 진행 방향을 따라 갈수록 상대적으로 점차 세분화되는 본 가열 히터들(131, 132, 133)을 포함한다.The main heating member 130 includes main heating heaters 131, 132, and 133 that are gradually subdivided gradually along the advancing direction of the polylactic acid film 10.
예를 들어, 도 6에 도시된 바와 같이, 상기 본 가열 부재(130)의 초입에는 상기 폴리유산 필름(10)의 폭 방향 전체를 일체로 가열해줄 수 있는 제 1 본 가열체(131)와, 상기 제 1 본 가열체(131)를 경유한 상기 폴리유산 필름(10)의 폭 방향을 3등분하여 가열해줄 수 있는 제 2 본 가열체(132)와, 상기 제 2 본 가열체(132)를 경유한 상기 폴리유산 필름(10)의 폭 방향을 6등분하여 가열해줄 수 있는 제 3 본 가열체(133)로 구성될 수 있다.For example, as shown in FIG. 6, a first bone heater 131 capable of heating the entire width direction of the polylactic acid film 10 integrally at the beginning of the main heating member 130, and The second main heating body 132 and the second main heating body 132 that can be heated by dividing the width direction of the polylactic acid film 10 by the first main heating body 131 in three equal parts. It may be composed of a third main heater 133 that can be heated by dividing the width direction of the polylactic acid film 10 into six equal parts.
상기와 같이 구성되면, 상기 폴리유산 필름(10)이 그 진행 방향을 따라 이동되면서 점차 세분화된 상기 본 가열 히터들(131, 132, 133)에 의해 점차 정밀하게 세분화되어 가열될 수 있으므로, 상기 폴리유산 필름(10)이 상기 금형 부재(140)에서 정확하게 성형될 수 있게 된다.When the polylactic acid film 10 is configured as described above, the polylactic acid film 10 may be gradually subdivided and heated by the present heating heaters 131, 132, and 133, which are gradually subdivided while moving along the traveling direction thereof. The lactic acid film 10 can be accurately molded in the mold member 140.
상기 금형 부재(140)는 상기 본 가열 부재(130)를 경유하며 가열된 상기 폴리유산 필름(10)을 상기 폴리유산 용기(20)의 요구되는 용기 형태로 성형하는 것이다.The mold member 140 molds the polylactic acid film 10 heated through the main heating member 130 into a required container shape of the polylactic acid container 20.
상세히, 상기 금형 부재(140)는 상기 폴리유산 용기(20)의 요구되는 저면 형태 성형을 위한 하부 금형체(142)와, 상기 폴리유산 용기(20)의 요구되는 상면 형태 성형을 위한 상부 금형체(141)와, 상기 하부 금형체(142)와 상기 상부 금형체(141) 중 적어도 하나에 내삽된 형태로 복수 개 배열되어 상기 온도 유지 부재(150)에 의해 가해지는 열기를 상기 금형 부재(140) 전체적으로 성형 및 결정화를 위해 전달하는 전열체(145)를 포함한다.In detail, the mold member 140 may include a lower mold body 142 for forming a required bottom shape of the polylactic acid container 20, and an upper mold body for molding a desired top shape of the polylactic acid container 20. 141 and a plurality of the plurality of lower mold bodies 142 and the upper mold bodies 141 are arranged in an interpolated manner to apply heat applied by the temperature maintaining member 150 to the mold members 140. ) Includes a heat transfer body 145 that is transferred for shaping and crystallization as a whole.
도면 번호 121은 상기 금형 부재(140)가 상기 폴리유산 필름(10)을 찍어서 성형하도록 하기 위해 상기 하부 금형체(142)와 상기 상부 금형체(141)가 서로 밀착되도록 한 다음 다시 서로 벌어지게 원위치되도록 하는 금형 이동 수단이다. Reference numeral 121 denotes the lower mold body 142 and the upper mold body 141 to be in close contact with each other, and then to be separated from each other in order to allow the mold member 140 to mold by molding the polylactic acid film 10. Mold moving means.
상기 금형 이동 수단(121)은 유압 실린더로 제시될 수 있고, 피스톤(122)이 상기 상부 금형체(141)에 연결될 수 있다. 물론, 상기 금형 이동 수단(121)이 유압 실린더로 제시되는 것은 예시적인 것이고, 상기 피스톤(122)이 상기 상부 금형체(141)에 연결되는 것도 예시적인 것이며, 상기 피스톤(122)이 상기 하부 금형체(142)에 연결될 수도 있다.The mold moving means 121 may be presented as a hydraulic cylinder, and the piston 122 may be connected to the upper mold body 141. Of course, the mold movement means 121 is presented as a hydraulic cylinder is an example, it is also exemplary that the piston 122 is connected to the upper mold body 141, the piston 122 is the lower gold It may also be connected to the body 142.
상기 전열체(145)는 상기 상부 금형체(141)와 상기 하부 금형체(142) 중 적어도 하나에 설치되고, 복수 개로 설치되며, 격자 형태 등으로 설치되어 상기 금형 부재(140)가 전체적으로 균일하게 가열될 수 있게 한다.The heat transfer body 145 is installed on at least one of the upper mold body 141 and the lower mold body 142, and a plurality of heat transfer body 145 is installed in a grid shape or the like so that the mold member 140 is uniformly overall. Allow to be heated.
상기 금형 부재(140)의 표면 온도가 균일화될 수 있도록, 복수 개의 상기 전열체(145)는 상기 금형 부재(140) 내부에 서로 이격된 형태로 배치되되, 상기 각 전열체(145)는 상기 금형 부재(140)의 표면으로부터 동일한 깊이에 각각 배치된다. 즉, 도 3에 도시된 바와 같이, 상기 금형 부재(140)의 표면이 다른 높낮이를 가질 것인데, 이러한 다른 높낮이에 대응하여, 상기 각 전열체(145)가 상기 금형 부재(140)의 표면으로부터 동일한 깊이에 있도록 배치되어, 전체적으로 상기 금형 부재(140)의 표면의 높낮이와 동일한 형태로 배치된다.In order that the surface temperature of the mold member 140 may be uniform, the plurality of heat transfer members 145 may be disposed in the mold member 140 to be spaced apart from each other, and the heat transfer bodies 145 may be disposed in the mold. Each is disposed at the same depth from the surface of the member 140. That is, as shown in Figure 3, the surface of the mold member 140 will have a different height, corresponding to this different height, each of the heat transfer body 145 is the same from the surface of the mold member 140 It is disposed so as to be deep, and is disposed in the same shape as the height of the surface of the mold member 140 as a whole.
상기와 같이 형성되면, 상기 금형 부재(140)의 표면이 균일하게 가열될 수 있게 되어, 상기 금형 부재(140)에서의 성형 및 결정화가 전체적으로 균질화될 수 있게 된다.When formed as described above, the surface of the mold member 140 can be uniformly heated, so that the molding and crystallization in the mold member 140 can be homogenized as a whole.
상기 온도 유지 부재(150)는 상기 금형 부재(140)의 온도를 요구되는 성형 결정화 온도로 유지시켜 주는 것이다.The temperature maintaining member 150 maintains the temperature of the mold member 140 at the required molding crystallization temperature.
상기 온도 유지 부재(150)에 의해 상기 금형 부재(140)의 온도가 상기 요구되는 성형 결정화 온도로 유지됨으로써, 상기 금형 부재(140)로 성형을 위해 인입된 상기 폴리유산 필름(10)이 상기 금형 부재(140)에서 성형과 함께 결정화(crystallization)될 수 있게 되고, 그에 따라 상기 폴리유산 용기(20)가 상기 금형 부재(140)에서 성형된 다음 별도 장치에서 결정화 공정을 거칠 필요가 없게 된다.The temperature of the mold member 140 is maintained by the temperature holding member 150 at the required molding crystallization temperature, whereby the polylactic acid film 10 introduced into the mold member 140 for molding is formed into the mold. It becomes possible to crystallize together with molding in the member 140, thereby eliminating the need for the polylactic acid container 20 to be molded in the mold member 140 and then undergoing a crystallization process in a separate apparatus.
상기 폴리유산 필름(10)의 성형과 동시 결정화를 위한 성형 결정화 온도는 상기 금형 부재(140)의 온도를 다단계로 변화시키면서 결정될 수 있다.Molding crystallization temperature for the simultaneous crystallization of the polylactic acid film 10 may be determined while changing the temperature of the mold member 140 in multiple stages.
예를 들어, 성형 결정화 제 1 단계에서는 상기 금형 부재(140)의 온도를 상기 폴리유산 필름(10)의 유리전이온도인 50 내지 60℃ 범위로 유지시키고, 성형 결정화 제 2 단계에서는 상기 금형 부재(140)의 온도를 70 내지 80℃ 범위로 승온하여 유지시키며, 성형 결정화 제 3 단계에서는 상기 금형 부재(140)의 온도를 상기 폴리유산 필름(10)의 유리전이온도와 융점 사이의 온도인 90 내지 100℃ 범위로 승온하여 유지시켜 보면서, 상기 폴리유산 필름(10)의 성형 및 결정화에 최적화된 온도인 성형 결정화 온도가 정해질 수 있고, 그 정해진 성형 결정화 온도가 상기 온도 유지 부재(150)에 의해 유지되는 환경 하에서 상기 금형 부재(140)에서 폴리유산 용기(20)의 지속적인 성형 공정이 이루어지게 된다.For example, in the first step of molding crystallization, the temperature of the mold member 140 is maintained in a range of 50 to 60 ° C. which is the glass transition temperature of the polylactic acid film 10, and in the second step of molding crystallization, the mold member ( 140 is maintained at a temperature in the range of 70 to 80 ° C, and in the third step of forming crystallization, the temperature of the mold member 140 is 90 to a temperature between the glass transition temperature and the melting point of the polylactic acid film 10. While maintaining the temperature in a range of 100 ° C., the molding crystallization temperature, which is a temperature optimized for molding and crystallization of the polylactic acid film 10, can be determined, and the predetermined molding crystallization temperature is determined by the temperature maintaining member 150. The continuous molding process of the polylactic acid container 20 is performed in the mold member 140 under the maintained environment.
상기 온도 유지 부재(150)는 오일 등의 순환 유체를 가열하여 상기 순환 유체를 상기 전열체(145)로 순환시켜 주는 것일 수 있고, 이 경우 상기 전열체(145)는 상기 온도 유지 부재(150)에서 순환되는 상기 순환 유체를 순환시켜 주는 배관이 된다. 이 경우 상기 온도 유지 부재(150)와 상기 순환체를 연결하는 전열 수단(151)은 상기 순환 유체의 유동 배관이 된다.The temperature maintaining member 150 may be to circulate the circulating fluid to the heat transfer body 145 by heating a circulating fluid such as oil, in which case the heat transfer body 145 is the temperature maintaining member 150. It becomes a pipe for circulating the circulating fluid circulated in. In this case, the heat transfer means 151 connecting the temperature maintaining member 150 and the circulator becomes a flow pipe of the circulating fluid.
한편, 상기 온도 유지 부재(150)는 전기를 공급해주고 제어하는 파워 서플라이 및 제어부의 기능을 하는 것일 수도 있고, 이 경우 상기 전열체(145)는 상기 온도 유지 부재(150)에서 공급되는 전기에 의해 발열되는 열선이 된다. 이 경우 상기 온도 유지 부재(150)와 상기 순환체를 연결하는 전열 수단(151)은 전기 공급을 위한 케이블이 된다.Meanwhile, the temperature maintaining member 150 may function as a power supply and a control unit for supplying and controlling electricity, and in this case, the heat transfer member 145 may be powered by electricity supplied from the temperature maintaining member 150. It becomes a heating wire that generates heat. In this case, the heat transfer means 151 connecting the temperature maintaining member 150 and the circulator becomes a cable for electricity supply.
상기 폴리유산 용기 제조장치(100)는 단열 밀폐 부재(125)를 더 포함할 수 있다.The polylactic acid container manufacturing apparatus 100 may further include a heat insulation sealing member 125.
상기 단열 밀폐 부재(125)는 상기 온도 유지 부재(150)에 의해 승온 및 온도 유지되는 상기 금형 부재(140)의 냉각이 방지될 수 있도록, 상기 금형 부재(140)를 외부에 대하여 단열 밀폐하는 것이다.The heat insulating sealing member 125 is to heat-sealing the mold member 140 to the outside so that the temperature of the mold member 140, which is heated and maintained by the temperature holding member 150 can be prevented. .
상기 단열 밀폐 부재(125)는 상기 금형 부재(140) 주변을 감싸 외부와 격리 공간을 형성하고, 내벽에 열차단막이 형성되는 등 내벽 단열화가 이루어져 있는 방식으로 단열 밀폐를 수행할 수 있다.The insulation sealing member 125 may surround the mold member 140 to form an insulation space with the outside, and may perform insulation sealing in such a manner that insulation of the inner wall is made such that a heat shield is formed on the inner wall.
상기 단열 밀폐 부재(125)의 적용에 따라, 상기 금형 부재(140)가 임의로 냉각되는 현상이 방지될 수 있어서, 상기 금형 부재(140)에서의 성형 및 결정화에 필요한 에너지 소모가 감소될 수 있게 된다.According to the application of the heat insulating sealing member 125, a phenomenon in which the mold member 140 is arbitrarily cooled can be prevented, so that energy consumption required for molding and crystallization in the mold member 140 can be reduced. .
이하에서는 도면을 참조하여 상기된 폴리유산 용기 제조장치(100)를 이용하여 본 실시예에 따른 폴리유산 용기(20)가 제조되는 제조방법에 대하여 설명한다.Hereinafter, a method of manufacturing the polylactic acid container 20 according to the present embodiment will be described using the polylactic acid container manufacturing apparatus 100 described above with reference to the drawings.
먼저, 폴리유산과 첨가제를 혼합하여 필름 형태로 압출된 폴리유산 필름(10) 형성 단계가 수행된다((a)단계).First, a step of forming a polylactic acid film 10 extruded in the form of a film by mixing polylactic acid and an additive is performed (step (a)).
여기서, 상기 (a)단계에서 상기 폴리유산에 첨가되는 상기 첨가제로는 활석, 충진재, 탄산칼슘 중 적어도 하나일 수 있고, 상기 폴리유산 100중량부에 대해 상기 첨가제는 1 내지 5중량부 첨가될 수 있다.Here, the additive added to the polylactic acid in the step (a) may be at least one of talc, filler, calcium carbonate, the additive may be added 1 to 5 parts by weight based on 100 parts by weight of the polylactic acid have.
상기와 같이 형성된 폴리유산 필름(10)이 상기 폴리유산 필름 공급 부재(101)에 감겨 있다가 공급된다.The polylactic acid film 10 formed as described above is wound around the polylactic acid film supply member 101 and then supplied.
그런 다음, 상기 (a)단계에서 형성된 상기 폴리유산 필름(10)을 상기 예열 부재(110)에서 150 내지 250℃ 범위 내에서 예열시키는 단계가 수행된다((b)단계)Then, the step of preheating the polylactic acid film 10 formed in the step (a) within the range of 150 to 250 ℃ in the preheating member 110 is performed (step (b))
상세히, 상기 (b)단계는 상기 예열 부재(110)의 온도를 150 내지 160℃ 범위로 유지시키면서 예열이 수행되는 예열 제 1 단계와, 상기 예열 제 1 단계를 거친 상기 예열 부재(110)의 온도를 190 내지 200℃ 범위로 승온하여 유지시키면서 예열이 수행되는 예열 제 2 단계와, 상기 예열 제 2 단계를 거친 상기 예열 부재(110)의 온도를 220℃로 승온하여 유지시키면서 예열이 수행되는 예열 제 3 단계와, 상기 예열 제 3 단계를 거친 상기 예열 부재(110)의 온도를 230℃로 승온하여 유지시키면서 예열이 수행되는 예열 제 4 단계와, 상기 예열 제 4 단계를 거친 상기 예열 부재(110)의 온도를 240℃로 승온하여 유지시키면서 예열이 수행되는 예열 제 5 단계를 포함한다.In detail, the step (b) is a preheating first step in which preheating is performed while maintaining the temperature of the preheating member 110 in a range of 150 to 160 ° C., and the temperature of the preheating member 110 which has undergone the preheating first step. Preheating step 2 to preheat is carried out while maintaining the temperature in the range of 190 to 200 ℃, and preheating is carried out while maintaining the temperature of the preheat member 110 subjected to the preheating second step to 220 ℃ A preheating fourth step in which preheating is performed while maintaining the temperature of the preheating member 110 undergoing the third step and the preheating third step at 230 ° C., and the preheating member 110 undergoing the preheating fourth step And a preheating fifth step in which preheating is performed while maintaining the temperature of the mixture at 240 ° C.
그런 다음, 상기 (b)단계에서 예열된 상기 폴리유산 필름(10)을 금형 부재(140)에 인입시켜, 상기 폴리유산 필름(10)을 상기 금형 부재(140)에서 요구되는 용기 형태로 성형함과 함께 결정화시키는 단계가 수행된다((c)단계).Then, the polylactic acid film 10 preheated in the step (b) is introduced into the mold member 140 to mold the polylactic acid film 10 into a container shape required by the mold member 140. Crystallization is carried out together (step (c)).
상세히, 상기 (c)단계에서, 성형 결정화 제 1 단계에서 상기 금형 부재(140)의 온도를 상기 폴리유산 필름(10)의 유리전이온도인 50 내지 60℃ 범위로 유지시키고, 성형 결정화 제 2 단계에서 상기 금형 부재(140)의 온도를 70 내지 80℃ 범위로 승온하여 유지시키며, 성형 결정화 제 3 단계에서 상기 금형 부재(140)의 온도를 상기 폴리유산 필름(10)의 유리전이온도와 융점 사이의 온도인 90 내지 100℃ 범위로 승온하여 유지시켜 보면서, 상기 폴리유산 필름(10)의 성형 및 결정화에 최적화된 온도인 성형 결정화 온도가 정해질 수 있고, 그 정해진 성형 결정화 온도가 상기 온도 유지 부재(150)에 의해 유지되는 환경 하에서 상기 금형 부재(140)에서 폴리유산 용기(20)의 지속적인 성형 공정이 이루어지게 되면서, 상기 폴리유산 용기(20)의 대량생산이 이루어지게 된다.In detail, in the step (c), in the first step of forming crystallization, the temperature of the mold member 140 is maintained in a range of 50 to 60 ° C., which is the glass transition temperature of the polylactic acid film 10, and the second step of forming crystallization. Maintain the temperature of the mold member 140 in the range of 70 to 80 ℃, the temperature of the mold member 140 in the third step of molding crystallization between the glass transition temperature and the melting point of the polylactic acid film 10 While maintaining the temperature rising in the range of 90 to 100 ℃, the molding crystallization temperature which is a temperature optimized for molding and crystallization of the polylactic acid film 10 can be determined, the predetermined molding crystallization temperature is the temperature holding member As the continuous molding process of the polylactic acid container 20 is performed in the mold member 140 under the environment maintained by 150, mass production of the polylactic acid container 20 is performed.
여기서, 상기 성형 결정화 제 1 단계, 상기 성형 결정화 제 2 단계 및 상기 성형 결정화 제 3 단계는 각각 1 내지 10초 범위 동안 수행될 수 있다.Here, the first molding crystallization step, the second molding crystallization step and the third molding crystallization step may be performed for 1 to 10 seconds, respectively.
한편, 상기 폴리유산 용기(20) 제조방법은 상기 (c)단계에서 성형 및 결정화된 폴리유산 용기(20)의 스크랩을 제거하는 트리밍 단계((d)단계)를 더 포함할 수 있다.Meanwhile, the polylactic acid container 20 manufacturing method may further include a trimming step (step (d)) of removing the scrap of the polylactic acid container 20 formed and crystallized in the step (c).
상기 (c)단계에서 성형 및 결정화된 폴리유산 용기(20)의 외곽에는 스크랩이 형성되는데, 이러한 스크랩이 칼날 등을 가진 스크랩 제거 부재(160)를 지나면서 제거된다.Scrap is formed on the outside of the polylactic acid container 20 molded and crystallized in step (c), and the scrap is removed while passing through the scrap removing member 160 having a blade or the like.
상기와 같은 과정을 거친 폴리유산 용기(20)는 이미 상기 금형 부재(140)에서 성형과 동시에 결정화까지 이루어졌기 때문에, 별도로 결정화를 위한 후공정이 요구되지 않게 된다.Since the polylactic acid container 20 which has undergone the above process has already been crystallized at the same time as the molding in the mold member 140, a separate post-process for crystallization is not required.
한편, 본 실시예에 따른 폴리유산 용기(20)는 폴리유산과 첨가제를 혼합하여 필름 형태로 압출된 폴리유산 필름(10) 형성 단계((a)단계)와, 상기 (a)단계에서 형성된 상기 폴리유산 필름(10)을 예열 부재(110)에서 150 내지 250℃ 범위 내에서 예열시키는 단계((b)단계)와, 상기 (b)단계에서 예열된 상기 폴리유산 필름(10)을 금형 부재(140)에 인입시켜, 상기 폴리유산 필름(10)을 상기 금형 부재(140)에서 요구되는 용기 형태로 성형함과 함께 결정화시키는 단계((c)단계)를 포함하는 폴리유산 용기(20) 제조방법에 의해 제조되어, 상기 금형 부재(140)에서 성형과 동시에 결정화까지 완료된 것이다.Meanwhile, in the polylactic acid container 20 according to the present embodiment, the polylactic acid film 10 is formed by mixing the polylactic acid and the additive and then extruded in the form of a film (step (a)), and the (l) Preheating the polylactic acid film 10 in the preheating member 110 within a range of 150 to 250 ° C (step (b)), and the polylactic acid film 10 preheated in the step (b). 140, a polylactic acid container 20 manufacturing method comprising the step of (c) crystallizing the polylactic acid film 10 in the form of a container required by the mold member 140, and the crystallization. It is manufactured by, and completed the crystallization at the same time as the molding in the mold member 140.
상기와 같이, 폴리유산 필름 공급 부재(101)와, 예열 부재(110)와, 본 가열 부재(130)와, 금형 부재(140)와, 온도 유지 부재(150)를 포함하는 폴리유산 용기 제조장치(100)를 이용하여 폴리유산 용기(20)가 제조됨으로써, 상기 금형 부재(140)로 성형을 위해 인입된 폴리유산 필름(10)이 상기 금형 부재(140)에서 성형과 함께 결정화될 수 있게 되고, 그에 따라 상기 폴리유산 용기(20)가 상기 금형 부재(140)에서 성형된 다음 별도 장치에서 후공정인 결정화 공정을 거칠 필요가 없게 되므로, 폴리유산 용기(20)의 내열성 향상을 위해 결정화 공정이 수행되면서도, 폴리유산 용기(20)의 제조 효율이 향상될 수 있게 된다.As described above, the polylactic acid container manufacturing apparatus including the polylactic acid film supply member 101, the preheat member 110, the main heating member 130, the mold member 140, and the temperature holding member 150. As the polylactic acid container 20 is manufactured using the 100, the polylactic acid film 10 introduced for molding into the mold member 140 may be crystallized together with the molding in the mold member 140. Therefore, since the polylactic acid container 20 is molded in the mold member 140 and does not need to undergo a post-crystallization crystallization process in a separate device, a crystallization process is performed to improve heat resistance of the polylactic acid container 20. While being performed, the production efficiency of the polylactic acid container 20 can be improved.
상기에서 본 발명은 특정한 실시예에 관하여 도시되고 설명되었지만, 당업계에서 통상의 지식을 가진 자라면 이하의 특허청구범위에 기재된 본 발명의 사상 및 영역을 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 알 수 있을 것이다. 그렇지만 이러한 수정 및 변형 구조들은 모두 본 발명의 권리범위 내에 포함되는 것임을 분명하게 밝혀두고자 한다.While the invention has been shown and described with respect to specific embodiments thereof, those skilled in the art can variously modify the invention without departing from the spirit and scope of the invention as set forth in the claims below. And that it can be changed. Nevertheless, it will be clearly understood that all such modifications and variations are included within the scope of the present invention.
본 발명의 일 측면에 따른 내열성이 향상된 폴리유산 용기 제조방법, 상기 제조방법에 의해 제작된 폴리유산 용기 및 상기 폴리유산 용기 제조장치에 의하면, 폴리유산 용기의 내열성 향상을 위해 결정화 공정이 수행되면서도, 폴리유산 용기의 제조 효율이 향상될 수 있으므로, 그 산업상 이용가능성이 높다고 하겠다.According to the polylactic acid container manufacturing method improved heat resistance, the polylactic acid container produced by the manufacturing method and the polylactic acid container manufacturing apparatus according to an aspect of the present invention, while the crystallization process is performed to improve the heat resistance of the polylactic acid container, Since the production efficiency of the polylactic acid container can be improved, it is said that the industrial applicability is high.

Claims (15)

  1. 폴리유산 용기를 제조하는 폴리유산 용기 제조장치에 있어서,In the polylactic acid container manufacturing apparatus for manufacturing a polylactic acid container,
    폴리유산을 포함하고 필름 형태로 형성된 폴리유산 필름을 공급하는 폴리유산 필름 공급 부재;A polylactic acid film supply member including a polylactic acid and supplying a polylactic acid film formed in a film form;
    상기 폴리유산 필름 공급 부재에 의해 공급되는 상기 폴리유산 필름을 예열시키는 예열 부재;A preheating member for preheating the polylactic acid film supplied by the polylactic acid film supply member;
    상기 예열 부재를 경유하며 예열된 상기 폴리유산 필름을 성형을 위해 가열하는 본 가열 부재;A main heating member which heats the preheated polylactic acid film for molding through the preheating member;
    상기 본 가열 부재를 경유하며 가열된 상기 폴리유산 필름을 상기 폴리유산 용기의 요구되는 용기 형태로 성형하는 금형 부재; 및A mold member for molding the heated polylactic acid film through the present heating member into a required container form of the polylactic acid container; And
    상기 금형 부재의 온도를 요구되는 성형 결정화 온도로 유지시켜 주는 온도 유지 부재;를 포함하고,And a temperature maintaining member for maintaining the temperature of the mold member at a required molding crystallization temperature.
    상기 온도 유지 부재에 의해 상기 금형 부재의 온도가 상기 요구되는 성형 결정화 온도로 유지됨으로써, 상기 금형 부재로 성형을 위해 인입된 상기 폴리유산 필름이 상기 금형 부재에서 성형과 함께 결정화(crystallization)되는 것을 특징으로 하는 폴리유산 용기 제조장치.Wherein the temperature of the mold member is maintained at the required molding crystallization temperature by the temperature holding member so that the polylactic acid film introduced for molding into the mold member is crystallized together with molding in the mold member. Polylactic acid container manufacturing apparatus.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 금형 부재는The mold member is
    상기 폴리유산 용기의 요구되는 저면 형태 성형을 위한 하부 금형체와,A lower mold body for forming a desired bottom shape of the polylactic acid container;
    상기 폴리유산 용기의 요구되는 상면 형태 성형을 위한 상부 금형체와,An upper mold body for forming a desired top shape of the polylactic acid container;
    상기 하부 금형체와 상기 상부 금형체 중 적어도 하나에 내삽된 형태로 복수 개 배열되어 상기 온도 유지 부재에 의해 가해지는 열기를 상기 금형 부재 전체적으로 성형 및 결정화를 위해 전달하는 전열체를 포함하는 것을 특징으로 하는 폴리유산 용기 제조장치.And a plurality of heat transfer bodies arranged in a shape interpolated in at least one of the lower mold body and the upper mold body to transfer heat applied by the temperature maintaining member to the entire mold member for molding and crystallization. Polylactic acid container manufacturing apparatus.
  3. 제 2 항에 있어서,The method of claim 2,
    상기 금형 부재의 표면 온도가 균일화될 수 있도록, 복수 개의 상기 전열체는 상기 금형 부재 내부에 서로 이격된 형태로 배치되되, 상기 각 전열체는 상기 금형 부재의 표면으로부터 동일한 깊이에 각각 배치되는 것을 특징으로 하는 폴리유산 용기 제조장치.A plurality of the heat transfer body is disposed in the form of spaced apart from each other in the inside of the mold member, so that the surface temperature of the mold member is uniform, each heat transfer body is disposed at the same depth from the surface of the mold member, respectively Polylactic acid container manufacturing apparatus.
  4. 제 2 항에 있어서,The method of claim 2,
    상기 금형 부재는 세라믹으로 이루어지는 것을 특징으로 하는 폴리유산 용기 제조장치.The mold member is a polylactic acid container manufacturing apparatus, characterized in that made of ceramic.
  5. 제 2 항에 있어서,The method of claim 2,
    상기 온도 유지 부재는 순환 유체를 가열하여 상기 순환 유체를 상기 전열체로 순환시켜 주는 것이고,The temperature maintaining member is to circulate the circulating fluid to the heat transfer body by heating the circulating fluid,
    상기 전열체는 상기 온도 유지 부재에서 순환되는 상기 순환 유체를 순환시켜 주는 배관인 것을 특징으로 하는 폴리유산 용기 제조장치.The heat transfer body is a polylactic acid container manufacturing apparatus, characterized in that the pipe for circulating the circulating fluid circulated by the temperature maintaining member.
  6. 제 2 항에 있어서,The method of claim 2,
    상기 온도 유지 부재는 전기를 공급해주고 제어하는 것이고,The temperature maintaining member is to supply and control electricity,
    상기 전열체는 상기 온도 유지 부재에서 공급되는 전기에 의해 발열되는 열선인 것을 특징으로 하는 폴리유산 용기 제조장치.The heat transfer body is a polylactic acid container manufacturing apparatus, characterized in that the heating wire generated by electricity supplied from the temperature holding member.
  7. 제 1 항에 있어서,The method of claim 1,
    상기 폴리유산 용기 제조장치는The polylactic acid container manufacturing apparatus
    상기 온도 유지 부재에 의해 승온 및 온도 유지되는 상기 금형 부재의 냉각이 방지될 수 있도록, 상기 금형 부재를 외부에 대하여 단열 밀폐하는 단열 밀폐 부재;를 포함하는 것을 특징으로 하는 폴리유산 용기 제조장치.And a heat insulation sealing member for thermally sealing the mold member to the outside so as to prevent cooling of the mold member which is heated and maintained by the temperature holding member.
  8. (a) 폴리유산과 첨가제를 혼합하여 필름 형태로 압출된 폴리유산 필름 형성 단계;(a) mixing a polylactic acid and an additive to form an extruded polylactic acid film in the form of a film;
    (b) 상기 (a)단계에서 형성된 상기 폴리유산 필름을 예열 부재에서 150 내지 250℃ 범위 내에서 예열시키는 단계; 및(b) preheating the polylactic acid film formed in step (a) within a range of 150 to 250 ° C. in a preheating member; And
    (c) 상기 (b)단계에서 예열된 상기 폴리유산 필름을 금형 부재에 인입시켜, 상기 폴리유산 필름을 상기 금형 부재에서 요구되는 용기 형태로 성형함과 함께 결정화시키는 단계;를 포함하는 내열성이 향상된 폴리유산 용기 제조방법.(c) introducing the polylactic acid film preheated in the step (b) into a mold member to form the polylactic acid film in a container shape required by the mold member and to crystallize the polylactic acid film; Polylactic acid container manufacturing method.
  9. 제 8 항에 있어서,The method of claim 8,
    상기 (c)단계에서, 상기 금형 부재의 온도를 상기 폴리유산 필름의 유리전이온도인 50 내지 60℃ 범위로 유지시키는 성형 결정화 제 1 단계와, 상기 금형 부재의 온도를 70 내지 80℃ 범위로 승온하여 유지시키는 성형 결정화 제 2 단계와, 상기 금형 부재의 온도를 상기 폴리유산 필름의 유리전이온도와 융점 사이의 온도인 90 내지 100℃ 범위로 승온하여 유지시키는 성형 결정화 제 3 단계를 수행하면서 상기 폴리유산 필름의 성형 및 결정화에 요구되는 온도인 성형 결정화 온도가 정해질 수 있고, 상기 정해진 성형 결정화 온도가 온도 유지 부재에 의해 유지되는 환경 하에서 상기 금형 부재에서 폴리유산 용기의 성형 공정이 이루어지게 되는 것을 특징으로 하는 내열성이 향상된 폴리유산 용기 제조방법.In the step (c), the first step of the molding crystallization to maintain the temperature of the mold member in the range of 50 to 60 ℃ the glass transition temperature of the polylactic acid film, and the temperature of the mold member in the range of 70 to 80 ℃ The polycrystalline crystallization step to maintain the temperature and the temperature of the mold member in the range of 90-100 ° C., which is a temperature between the glass transition temperature and the melting point of the polylactic acid film, The molding crystallization temperature, which is a temperature required for molding and crystallization of the lactic acid film, may be determined, and the molding process of the polylactic acid container is performed in the mold member under an environment in which the predetermined molding crystallization temperature is maintained by the temperature holding member. Method for producing a polylactic acid container improved heat resistance.
  10. 제 9 항에 있어서,The method of claim 9,
    상기 성형 결정화 제 1 단계, 상기 성형 결정화 제 2 단계 및 상기 성형 결정화 제 3 단계는 각각 1 내지 10초 범위 동안 수행되는 것을 특징으로 하는 내열성이 향상된 폴리유산 용기 제조방법.Wherein the first step of crystallization, the second step of crystallization, and the third step of crystallization are performed for 1 to 10 seconds, respectively.
  11. 제 8 항에 있어서,The method of claim 8,
    상기 (b)단계는Step (b) is
    상기 예열 부재의 온도를 150 내지 160℃ 범위로 유지시키면서 예열이 수행되는 예열 제 1 단계와,A preheating first step in which preheating is performed while maintaining the temperature of the preheating member in the range of 150 to 160 ° C,
    상기 예열 제 1 단계를 거친 상기 예열 부재의 온도를 190 내지 200℃ 범위로 승온하여 유지시키면서 예열이 수행되는 예열 제 2 단계와,A preheating second step in which preheating is performed while maintaining the temperature of the preheating member that has passed through the first preheating step in the range of 190 to 200 ° C.
    상기 예열 제 2 단계를 거친 상기 예열 부재의 온도를 220℃로 승온하여 유지시키면서 예열이 수행되는 예열 제 3 단계와,A preheating third step in which preheating is performed while maintaining the temperature of the preheating member which has passed through the preheating second step at 220 ° C.,
    상기 예열 제 3 단계를 거친 상기 예열 부재의 온도를 230℃로 승온하여 유지시키면서 예열이 수행되는 예열 제 4 단계와,A preheating fourth step in which preheating is performed while maintaining the temperature of the preheating member which has passed through the preheating third step at 230 ° C.,
    상기 예열 제 4 단계를 거친 상기 예열 부재의 온도를 240℃로 승온하여 유지시키면서 예열이 수행되는 예열 제 5 단계를 포함하는 것을 특징으로 하는 내열성이 향상된 폴리유산 용기 제조방법.And a preheating fifth step in which preheating is performed while maintaining the temperature of the preheating member which has passed through the preheating fourth step at a temperature of 240 ° C.
  12. 제 8 항에 있어서,The method of claim 8,
    상기 (a)단계에서 상기 폴리유산에 첨가되는 상기 첨가제로는 활석, 충진재, 탄산칼슘 중 적어도 하나인 것을 특징으로 하는 내열성이 향상된 폴리유산 용기 제조방법.The additive added to the polylactic acid in the step (a) is a polylactic acid container manufacturing method having improved heat resistance, characterized in that at least one of talc, filler, calcium carbonate.
  13. 제 8 항에 있어서,The method of claim 8,
    상기 (a)단계에서 상기 폴리유산 100중량부에 대해 상기 첨가제는 1 내지 5중량부 첨가되는 것을 특징으로 하는 내열성이 향상된 폴리유산 용기 제조방법.The method of claim 1, wherein the additive is added in an amount of 1 to 5 parts by weight based on 100 parts by weight of the polylactic acid.
  14. 제 8 항에 있어서,The method of claim 8,
    상기 폴리유산 용기 제조방법은The polylactic acid container manufacturing method
    (d) 상기 (c)단계에서 성형 및 결정화된 폴리유산 용기의 스크랩을 제거하는 트리밍 단계;를 더 포함하는 것을 특징으로 하는 내열성이 향상된 폴리유산 용기 제조방법.(d) a trimming step of removing the scrap of the polylactic acid container molded and crystallized in the step (c); and further comprising a polylactic acid container improved heat resistance.
  15. (a) 폴리유산과 첨가제를 혼합하여 필름 형태로 압출된 폴리유산 필름 형성 단계와, (b) 상기 (a)단계에서 형성된 상기 폴리유산 필름을 예열 부재에서 150 내지 250℃ 범위 내에서 예열시키는 단계와, (c) 상기 (b)단계에서 예열된 상기 폴리유산 필름을 금형 부재에 인입시켜, 상기 폴리유산 필름을 상기 금형 부재에서 요구되는 용기 형태로 성형함과 함께 결정화시키는 단계를 포함하는 폴리유산 용기 제조방법에 의해 제조되어, 상기 금형 부재에서 성형과 동시에 결정화까지 완료된 것을 특징으로 하는 폴리유산 용기.(a) mixing a polylactic acid and an additive to form a polylactic acid film extruded in the form of a film, and (b) preheating the polylactic acid film formed in the step (a) within a range of 150 to 250 ° C. in a preheating member. And (c) introducing the polylactic acid film preheated in the step (b) into a mold member to crystallize the polylactic acid film into a container shape required by the mold member and to crystallize it. A polylactic acid container, which is manufactured by a container manufacturing method and completes crystallization simultaneously with molding in the mold member.
PCT/KR2016/009636 2016-04-01 2016-08-30 Method for manufacturing polylactic acid container having improved heat resistance, polylactic acid container manufactured by manufacturing method, and apparatus for manufacturing polylactic acid container WO2017171156A1 (en)

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