WO2017171156A1 - Procédé de fabrication d'un récipient en acide polylactique ayant une résistance à la chaleur améliorée, récipient en acide polylactique ainsi fabriqué et appareil pour fabriquer un récipient en acide polylactique - Google Patents

Procédé de fabrication d'un récipient en acide polylactique ayant une résistance à la chaleur améliorée, récipient en acide polylactique ainsi fabriqué et appareil pour fabriquer un récipient en acide polylactique 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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WO
WIPO (PCT)
Prior art keywords
polylactic acid
temperature
preheating
mold member
container
Prior art date
Application number
PCT/KR2016/009636
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English (en)
Korean (ko)
Inventor
김성수
김현선
김현철
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김성수
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Publication date
Application filed by 김성수 filed Critical 김성수
Publication of WO2017171156A1 publication Critical patent/WO2017171156A1/fr

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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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un récipient en acide polylactique ayant une résistance à la chaleur améliorée, un récipient en acide polylactique ainsi fabriqué et un appareil pour fabriquer le récipient en acide polylactique, qui sont caractérisés en ce qu'un film d'acide polylactique, qui pénètre dans un élément de moule destiné à le mouler, est cristallisé dans un élément de moule tout en étant moulé, ce qui présente l'avantage de ne pas devoir soumettre le récipient en acide polylactique à un processus de cristallisation réalisé comme post-traitement dans un dispositif distinct, après moulage dans l'élément de moule.
PCT/KR2016/009636 2016-04-01 2016-08-30 Procédé de fabrication d'un récipient en acide polylactique ayant une résistance à la chaleur améliorée, récipient en acide polylactique ainsi fabriqué et appareil pour fabriquer un récipient en acide polylactique WO2017171156A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160040219A KR101642268B1 (ko) 2016-04-01 2016-04-01 내열성이 향상된 폴리유산 용기 제조방법, 상기 제조방법에 의해 제작된 폴리유산 용기 및 상기 폴리유산 용기 제조장치
KR10-2016-0040219 2016-04-01

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WO2017171156A1 true WO2017171156A1 (fr) 2017-10-05

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KR (1) KR101642268B1 (fr)
WO (1) WO2017171156A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114347518A (zh) * 2021-12-31 2022-04-15 漳州杰安塑料有限公司 一种pla吸管结晶工艺

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KR20010047657A (ko) * 1999-11-22 2001-06-15 윤근수 가압성형제품의 성형방법
JP2007254522A (ja) * 2006-03-22 2007-10-04 Cp Kasei Kk ポリ乳酸系樹脂製発泡シート、およびこのシート製容器の製造方法
JP2011255587A (ja) * 2010-06-09 2011-12-22 Tamio Omae 熱可塑性樹脂の成形方法及び熱成形用の鋳型
KR20120113468A (ko) * 2011-04-05 2012-10-15 트리 칸 코포레이션 리미티드 식물섬유 발포재 제작방법
KR20140007859A (ko) * 2011-02-24 2014-01-20 도레이 카부시키가이샤 폴리락트산계 필름

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KR20110045588A (ko) 2009-10-27 2011-05-04 도레이첨단소재 주식회사 내열성이 우수한 폴리유산계 시트 및 이를 이용한 용기

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Publication number Priority date Publication date Assignee Title
KR20010047657A (ko) * 1999-11-22 2001-06-15 윤근수 가압성형제품의 성형방법
JP2007254522A (ja) * 2006-03-22 2007-10-04 Cp Kasei Kk ポリ乳酸系樹脂製発泡シート、およびこのシート製容器の製造方法
JP2011255587A (ja) * 2010-06-09 2011-12-22 Tamio Omae 熱可塑性樹脂の成形方法及び熱成形用の鋳型
KR20140007859A (ko) * 2011-02-24 2014-01-20 도레이 카부시키가이샤 폴리락트산계 필름
KR20120113468A (ko) * 2011-04-05 2012-10-15 트리 칸 코포레이션 리미티드 식물섬유 발포재 제작방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114347518A (zh) * 2021-12-31 2022-04-15 漳州杰安塑料有限公司 一种pla吸管结晶工艺

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