TW201425157A - Packing for food and drink container, and lid for liquid container and liquid container with lid using said packing - Google Patents
Packing for food and drink container, and lid for liquid container and liquid container with lid using said packing Download PDFInfo
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- TW201425157A TW201425157A TW101149614A TW101149614A TW201425157A TW 201425157 A TW201425157 A TW 201425157A TW 101149614 A TW101149614 A TW 101149614A TW 101149614 A TW101149614 A TW 101149614A TW 201425157 A TW201425157 A TW 201425157A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
- B65D53/02—Collars or rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
- C08J2201/032—Impregnation of a formed object with a gas
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/06—CO2, N2 or noble gases
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/08—Supercritical fluid
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/044—Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/052—Closed cells, i.e. more than 50% of the pores are closed
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/16—Ethene-propene or ethene-propene-diene copolymers
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- Chemical Kinetics & Catalysis (AREA)
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
本發明係關於一種用於飲食容器之襯墊,更詳細而言,係關於一種用於飲水機(water server)之液體容器之蓋所使用之襯墊。 The present invention relates to a liner for a food container, and more particularly to a liner for use in a lid for a liquid container for a water server.
於家庭或工作場所中,設置飲水機以便平時可將可口之水作為飲料用等而簡便地使用。該飲水機係以如下方式設置:包含具備出水之水龍頭之本體,且於該本體上設置水瓶(water bottle),從而自該水龍頭一直有可口之水流出。 In the home or workplace, a water dispenser is provided so that the delicious water can be easily used as a beverage or the like. The water dispenser is provided in the following manner: a body including a faucet having a water outlet, and a water bottle is disposed on the body, so that there is always a delicious water flowing out from the faucet.
該水瓶係使開口部位於下側而搭載於本體上。此時,為了使水不漏出至外部,而於水瓶之蓋上設置有襯墊。該襯墊通常係使用獨立氣泡之發泡體,但若於該襯墊中產生臭氣,則存在該臭氣轉移至水中而使水之品質降低之問題。因此,為了解決該問題,而進行有各種研究(例如,專利文獻1)。 The water bottle is mounted on the main body such that the opening is located on the lower side. At this time, in order to prevent water from leaking to the outside, a gasket is provided on the lid of the water bottle. This liner is usually a foam using closed cells. However, if an odor is generated in the gasket, there is a problem that the odor is transferred to water to lower the quality of water. Therefore, in order to solve this problem, various studies have been conducted (for example, Patent Document 1).
專利文獻1:日本專利特開2010-30679號公報 Patent Document 1: Japanese Patent Laid-Open Publication No. 2010-30679
先前之襯墊除了臭氣之問題以外,有時於該襯墊內部混入黑色之異物已成為問題。關於該異物,由於襯墊係用於飲食品,故而亦被視為問題。因此,本發明之目的在於提 供一種臭氣之產生、及異物之混入之虞較低之飲食品用襯墊。 In addition to the problem of odor, the prior gasket sometimes has a problem of mixing black foreign matter inside the liner. Regarding the foreign matter, since the liner is used for foods and drinks, it is also considered a problem. Therefore, the object of the present invention is to provide A pad for food and drink that is used for the production of odors and the incorporation of foreign matter.
本發明者發現該臭氣及異物之混入之原因在於襯墊之發泡時所使用之化學發泡劑,從而完成了本發明。 The present inventors have found that the reason for the incorporation of the odor and the foreign matter is the chemical foaming agent used in the foaming of the liner, and the present invention has been completed.
本發明(1)係一種飲食品容器用襯墊,其係用於收納飲食品之容器者;其特徵在於:包含藉由對熔融狀態之熱塑性樹脂組合物含浸發泡劑之後進行減壓而獲得之具有獨立氣泡的發泡體;上述發泡劑為超臨界二氧化碳;且上述發泡體之密度為40~300 kg/m3。 The present invention (1) is a pad for food and beverage containers, which is used for a container for accommodating foods and drinks; and is characterized in that it is obtained by impregnating a thermoplastic resin composition in a molten state with a foaming agent and then reducing the pressure. The foam having independent bubbles; the foaming agent is supercritical carbon dioxide; and the foam has a density of 40 to 300 kg/m 3 .
本發明(2)係如上述發明(1)之飲食品容器用襯墊,其中上述發泡體之剖面中之氣泡之數量為100~500個/mm2。 The present invention (2) is the pad for food and beverage containers according to the above aspect (1), wherein the number of the bubbles in the cross section of the foam is 100 to 500 / mm 2 .
本發明(3)係如上述發明(1)或(2)之飲食品容器用襯墊,其中上述發泡體之剖面中之氣泡直徑為50 μm以下之氣泡之個數比率為整體之50%以上。 The present invention (3) is the pad for food and beverage containers according to the above aspect (1) or (2), wherein the ratio of the number of bubbles having a bubble diameter of 50 μm or less in the cross section of the foam is 50% of the whole. the above.
本發明(4)係如上述發明(1)至(3)中任一項之飲食品容器用襯墊,其中上述含浸係於溫度31℃以上、壓力7.3 MPa以上之系統內進行。 The liner for food and beverage containers according to any one of the above aspects of the invention, wherein the impregnation is carried out in a system having a temperature of 31 ° C or higher and a pressure of 7.3 MPa or more.
本發明(5)係如上述發明(1)至(4)中任一項之飲食品容器用襯墊,其中上述發泡體係經過減壓時之擠出成形而形成為長條片狀者。 The pad for foods and drinks containers according to any one of the above aspects of the invention, wherein the foaming system is formed into a long sheet shape by extrusion molding under reduced pressure.
本發明(6)係如上述發明(1)至(5)中任一項之飲食品容器用襯墊,其中上述熱塑性樹脂組合物包含聚烯烴樹脂。 The pad for foods and drinks containers according to any one of the above aspects of the invention, wherein the thermoplastic resin composition comprises a polyolefin resin.
本發明(7)係一種液體容器用蓋,其係用於使開口部位於鉛垂向下而使用之液體容器之蓋;且包含:底部;圓筒狀外壁,其覆蓋該底部之外周,且與上述底部液密性地接合;及襯墊,其設置於上述底部之較圓筒狀外壁內更靠內側之至少周圍部分;且上述襯墊係如上述發明(1)至(6)中任一項之襯墊。 The invention (7) is a lid for a liquid container, which is a lid for a liquid container in which the opening portion is used vertically downward; and includes: a bottom portion; a cylindrical outer wall covering the outer circumference of the bottom portion, and a liquid-tight joint with the bottom portion; and a gasket disposed at least a peripheral portion of the bottom portion of the bottom portion of the cylindrical outer wall; and the gasket is as in any of the above inventions (1) to (6) A padding.
本發明(8)係如上述發明(7)之液體容器用蓋,其包含:圓筒狀內壁,其設置於上述底部之較上述圓筒狀外壁更靠內側,且與上述底部液密性地接合;及液體導出孔,其設置於上述底部之圓筒狀內壁內側;上述襯墊係設置於上述底部之上述外壁及內壁之間部分;且該液體容器用蓋係用於飲水機之瓶罐(bottle tank)。 According to a seventh aspect of the invention, the liquid container cover of the invention of the present invention, comprising: a cylindrical inner wall provided on the inner side of the bottom outer portion of the cylindrical outer wall and having a liquid tightness with the bottom portion And a liquid outlet hole disposed inside the cylindrical inner wall of the bottom portion; the gasket is disposed between the outer wall and the inner wall of the bottom portion; and the liquid container cover is used for a water dispenser Bottle tank.
本發明(9)係一種附蓋液體容器,其包括:如上述發明(7)或(8)之液體容器用蓋;以及液體容器,其包含:液體容器,其收納液體;及開口部,其相對於設置於上述底部之襯墊及上述蓋之圓筒狀外壁液密性地連接。 The present invention (9) is a covered liquid container comprising: the lid for a liquid container according to the above (7) or (8); and a liquid container comprising: a liquid container accommodating the liquid; and an opening portion The liquid is tightly connected to the liner provided on the bottom and the cylindrical outer wall of the lid.
本發明(10)係一種襯墊之製造方法,其係製造用於收納飲食品之容器之包含發泡體之襯墊之方法;且包括如下步驟: 使熱塑性樹脂組合物熔融;對熔融之熱塑性樹脂組合物含浸發泡劑;及將含浸有上述發泡劑之熱塑性樹脂組合物減壓而獲得上述發泡體;且上述發泡劑為超臨界二氧化碳。 The present invention (10) is a method for producing a liner, which is a method for producing a foam-containing liner for accommodating a food or beverage container; and includes the following steps: Melting the thermoplastic resin composition; impregnating the molten thermoplastic resin composition with a foaming agent; and decompressing the thermoplastic resin composition impregnated with the foaming agent to obtain the foam; and the foaming agent is supercritical carbon dioxide .
本發明(11)係如技術方案10之襯墊之製造方法,其中上述進行含浸之步驟係於溫度31℃以上、壓力7.3 MPa以上之系統內進行。 The invention of claim 11 is the method for producing a liner according to claim 10, wherein the step of impregnating is carried out in a system having a temperature of 31 ° C or more and a pressure of 7.3 MPa or more.
本發明(12)係如上述發明(10)或(11)之襯墊之製造方法,其中獲得上述發泡體之步驟係經過減壓時之擠出成形而獲得長條片狀發泡體之步驟;且 上述襯墊之製造方法更包括自上述長條片狀發泡體進行衝裁加工而獲得襯墊之步驟。 The present invention (12) is the method for producing a liner according to the above aspect (10) or (11), wherein the step of obtaining the above-mentioned foam is obtained by extrusion molding under reduced pressure to obtain a long sheet-like foam. Step; and The method for producing the above-mentioned liner further includes the step of obtaining a liner by punching from the long sheet-like foam.
根據本發明,藉由使用超臨界二氧化碳作為發泡劑,而於製造後該發泡劑成為氣體之二氧化碳,從而發揮不殘留臭味或黑色異物之原因物質之效果。此外,藉由選擇超臨界二氧化碳作為發泡劑,而可獲得氣泡直徑較小且細膩之發泡體,故而發泡內所生成之氣泡易成為獨立氣泡,且易於保證液密性或氣密性。又,藉由在超臨界氣體中選擇超臨界二氧化碳,從而氣泡直徑不會變得過小而成為適度之大小,故而發泡體具有適度之變形性,且藉由夾持於容器之開口部與蓋之間而變得易於形成液密構造。 According to the present invention, by using supercritical carbon dioxide as a foaming agent, the foaming agent becomes carbon dioxide of the gas after the production, and the effect of not causing odor or black foreign matter is exhibited. In addition, by selecting supercritical carbon dioxide as a foaming agent, a foam having a small bubble diameter and a fine foam can be obtained, so that bubbles generated in the foaming tend to be independent bubbles, and liquid tightness or airtightness is easily ensured. . Further, by selecting supercritical carbon dioxide in the supercritical gas, the diameter of the bubble does not become too small and becomes an appropriate size, so that the foam has moderate deformability and is held by the opening and the lid of the container. It becomes easy to form a liquid-tight structure between them.
本發明係一種為了於收納飲食品之容器中保證液密性或氣密性而使用之襯墊。本發明之襯墊之特徵在於:包含藉由對熔融狀態之熱塑性樹脂組合物含浸發泡劑之後進行減壓而獲得之具有獨立氣泡的發泡體,且上述發泡劑為超臨界二氧化碳。與使用化學發泡劑之情形不同,藉由使用超臨界二氧化碳,製造步驟中所使用之發泡劑會成為氣體之二氧化碳,因此不會成為臭味或黑色異物之原因,進而即便混入飲食品內亦不會對人體造成傷害。此外,藉由選擇超臨界二氧化碳,而可獲得氣泡直徑較小且細膩之發泡體,故而發泡內所生成之氣泡易成為獨立氣泡,且易於保證液密性或氣密性。又,藉由在超臨界氣體中選擇超臨界二氧化碳,從而氣泡直徑不會變得過小而成為適度之大小,因此發泡體具有適度之變形性,且藉由夾持於容器之口與蓋之間而變得易於形成液密構造。 The present invention is a liner which is used for ensuring liquid tightness or airtightness in a container for accommodating foods and drinks. The gasket of the present invention is characterized by comprising a foam having closed cells obtained by impregnating a thermoplastic resin composition in a molten state with a pressure-reducing agent, and the foaming agent is supercritical carbon dioxide. Unlike the case of using a chemical foaming agent, by using supercritical carbon dioxide, the foaming agent used in the production step becomes carbon dioxide of the gas, so that it does not become a cause of odor or black foreign matter, and even if it is mixed into foods and drinks. It will not cause harm to the human body. Further, by selecting the supercritical carbon dioxide, a foam having a small bubble diameter and fineness can be obtained, so that the bubbles generated in the foaming tend to be independent bubbles, and liquid tightness or airtightness is easily secured. Further, by selecting supercritical carbon dioxide in the supercritical gas, the bubble diameter does not become too small and becomes an appropriate size, so that the foam has moderate deformability and is held by the mouth and the lid of the container. It becomes easy to form a liquid-tight structure.
本發明之襯墊所使用之發泡體之密度為40~300 kg/m3,較佳為40~250 kg/m3,更佳為40~100 kg/m3,最佳為40~80 kg/m3。發泡體之密度係依據JIS-K7222進行測定。 The foam used in the gasket of the present invention has a density of 40 to 300 kg/m 3 , preferably 40 to 250 kg/m 3 , more preferably 40 to 100 kg/m 3 , and most preferably 40 to 80. Kg/m 3 . The density of the foam was measured in accordance with JIS-K7222.
發泡體之剖面中之氣泡之數量較佳為100~500個/mm2,更佳為200~450個/mm2,進而較佳為300~450個/mm2。發泡體之剖面中之氣泡之數量係根據於將發泡體切割所得之剖面中任意決定之8點以上之1 mm×1 mm之視野內所包含之氣泡之數量的平均值而算出。具有此種範圍之氣泡之數量意味著於發泡體內氣泡細膩地形成。因此,藉由設定為此種範圍,而發揮如下效果:於欲使液體自發泡體之一 面相對於另一面通過之情形時,會形成多個壁面,即便假設產生包含一部分連通之氣泡之缺陷,亦可藉由保證其他氣泡之獨立性而彌補該缺陷,結果液體變得不易通過,而可獲得較高之液密性。 The number of bubbles in the cross section of the foam is preferably from 100 to 500 / mm 2 , more preferably from 200 to 450 / mm 2 , and still more preferably from 300 to 450 / mm 2 . The number of the bubbles in the cross section of the foam is calculated from the average value of the number of bubbles included in the field of view of 1 mm × 1 mm which is arbitrarily determined at 8 or more points in the cross section obtained by cutting the foam. The number of bubbles having such a range means that bubbles are formed finely in the foam. Therefore, by setting such a range, it is effective to form a plurality of wall surfaces when a liquid is to be allowed to pass from one surface of the foam to the other surface, even if it is assumed that a defect containing a part of the connected bubbles is generated. The defect can also be compensated for by ensuring the independence of other bubbles, and as a result, the liquid becomes difficult to pass, and a high liquid tightness can be obtained.
再者,於經過藉由擠出成形形成連續長條片材而製造等從而氣泡成為橢圓球狀之發泡體之情形時,於該發泡體之剖面中,出現氣泡變為橢圓之方向(與長度方向平行之方向等)、與氣泡變為圓(或成為最小長徑之橢圓)之方向(與長度方向垂直之方向)。於此情形時,發泡體之剖面中之氣泡之數量設為於與上述長度方向垂直之方向之剖面中觀察所得之值。 In the case where a bubble is formed into an elliptical spherical foam by the formation of a continuous long strip by extrusion molding, the bubble becomes an ellipse in the cross section of the foam ( The direction parallel to the longitudinal direction, etc.), the direction in which the bubble becomes a circle (or an ellipse that becomes the smallest long diameter) (the direction perpendicular to the longitudinal direction). In this case, the number of the bubbles in the cross section of the foam is set to a value observed in a cross section perpendicular to the longitudinal direction.
較佳為發泡體之剖面中之氣泡直徑為50 μm以下之氣泡之個數比率相對於剖面中之氣泡整體之個數為50%以上。又,較佳為剖面中之氣泡直徑為100 μm以下之氣泡之個數比率相對於剖面中之氣泡整體之個數為80%以下。氣泡之比率係根據於將發泡體切割所得之剖面中任意決定之8點以上之1 mm×1 mm之視野內所包含之氣泡之直徑與數量之分佈而算出。藉由包含該範圍之氣泡,而使氣泡之大小變小,因此變得易於保證氣泡之獨立性,從而提高液密性。 It is preferable that the number ratio of the bubbles having a bubble diameter of 50 μm or less in the cross section of the foam is 50% or more with respect to the total number of the bubbles in the cross section. Further, it is preferable that the number ratio of the bubbles having a bubble diameter of 100 μm or less in the cross section is 80% or less with respect to the total number of the bubbles in the cross section. The ratio of the bubbles is calculated based on the distribution of the diameter and the number of the bubbles included in the field of view of 1 mm × 1 mm which is arbitrarily determined from the cross section obtained by cutting the foam. By including the bubbles in the range, the size of the bubbles is made small, so that it is easy to ensure the independence of the bubbles, thereby improving the liquid tightness.
再者,於經過藉由擠出成形形成連續長條片材而製造等從而氣泡成為橢圓球狀之發泡體之情形時,氣泡之個數比率係設為於氣泡變為圓形(或變為長徑為最小值之橢圓)之方向(與長度方向垂直之方向)之剖面中觀察所得之值。再者,於氣泡並非正球狀之情形時,以與長度方向垂直之方 向之剖面中之氣泡形狀之長徑為基準評價氣泡直徑。 In the case where a continuous elongated strip is formed by extrusion molding and the bubbles are formed into an ellipsoidal foam, the number of bubbles is set to be circular (or The value obtained by observing the cross section of the ellipse whose long diameter is the minimum value (the direction perpendicular to the longitudinal direction). Furthermore, when the bubble is not a spherical shape, it is perpendicular to the length direction. The diameter of the bubble was evaluated on the basis of the long diameter of the bubble shape in the cross section.
本發明中所使用之發泡體包含具有藉由將熔融狀態之熱塑性樹脂組合物與發泡劑混合並擠出成形而獲得之獨立氣泡之發泡體材料。 The foam used in the present invention contains a foam material having closed cells obtained by mixing and extruding a thermoplastic resin composition in a molten state with a foaming agent.
發泡體中所使用之熱塑性樹脂組合物較佳為包含聚烯烴樹脂。用作聚烯烴樹脂之聚合物並無特別限定,可列舉聚丙烯(例如,無規聚丙烯、嵌段聚丙烯、均聚丙烯、高熔融張力聚丙烯)、聚乙烯、丙烯-乙烯共聚物等。 The thermoplastic resin composition used in the foam preferably contains a polyolefin resin. The polymer used as the polyolefin resin is not particularly limited, and examples thereof include polypropylene (for example, random polypropylene, block polypropylene, homopolypropylene, high melt tension polypropylene), polyethylene, propylene-ethylene copolymer, and the like. .
熱塑性樹脂組合物並無特別限定,較佳為使用含有聚丙烯之樹脂。作為所使用之聚丙烯,只要為含有丙烯單體成分之聚合物材料,則並無特別限定,例如,可列舉聚丙烯、丙烯-乙烯共聚物。 The thermoplastic resin composition is not particularly limited, and a resin containing polypropylene is preferably used. The polypropylene to be used is not particularly limited as long as it is a polymer material containing a propylene monomer component, and examples thereof include polypropylene and a propylene-ethylene copolymer.
又,此處所使用之熱塑性樹脂組合物之主要成分之於熔解溫度150℃以上JIS-K7210所規定之230℃、2.16 kgf時之MFR(Melt Flow Rate,熔體流動速率)較佳為5 g/10分鐘以下,更佳為3 g/10分鐘以下,進而較佳為1 g/10分鐘以下。熱塑性樹脂組合物之主要成分較佳為聚丙烯材料。再者,所謂主要成分係指熱塑性樹脂組合物中占最多比例(重量基準)之成分。 Further, the main component of the thermoplastic resin composition used herein has a MFR (Melt Flow Rate) of preferably 5 g/ at a melting temperature of 150 ° C or more and 230 ° C and 2.16 kgf as defined by JIS-K7210. It is 10 minutes or less, more preferably 3 g/10 minutes or less, further preferably 1 g/10 minutes or less. The main component of the thermoplastic resin composition is preferably a polypropylene material. Further, the main component means a component which accounts for the largest proportion (by weight) of the thermoplastic resin composition.
又,作為較佳之主要成分之聚丙烯之結晶化率較佳為30~100%,更佳為30~80%,進而較佳為30~70%。藉由設為該範圍,於發泡成形時更易冷卻固化,而可獲得微細之 微胞之發泡體。再者,結晶化率係以JIS-K7121塑膠之轉移溫度測定方法為參考而算出。使預先於200℃下熔解,且以10℃/分鐘之冷卻速度冷卻所得之試樣以升溫速度10℃/分鐘熔解,而獲得熔解能量。作為比較材料,將以相同之方式測定於JIS-K7210所規定之230℃、2.16 kgf下評價之MFR為40 g/10分鐘以上之均聚丙烯樹脂而獲得之熔解能量時之結晶化度設為100%,而算出欲評價之樣品之結晶化度。MFR為40 g/10分鐘以上之均聚丙烯由於熔解能量變得大致固定,故而判斷為飽和並將MFR為40以上之材料設為比較材料。 Further, the crystallization ratio of the polypropylene which is a preferred main component is preferably from 30 to 100%, more preferably from 30 to 80%, still more preferably from 30 to 70%. By setting it as the range, it is easier to cool and solidify at the time of foam molding, and it is possible to obtain fineness. Foam of microcells. Further, the crystallization ratio was calculated based on the measurement method of the transfer temperature of JIS-K7121 plastic. The sample which was previously melted at 200 ° C and cooled at a cooling rate of 10 ° C /min was melted at a temperature increase rate of 10 ° C / min to obtain a melting energy. As a comparative material, the degree of crystallization when the melting energy obtained by measuring the polypropylene resin having an MFR of 40 g/10 minutes or more at 230 ° C and 2.16 kgf as defined in JIS-K7210 was measured in the same manner. 100%, and the degree of crystallization of the sample to be evaluated was calculated. The homopolypropylene having an MFR of 40 g/10 minutes or more has a melting energy which is substantially fixed, so that it is judged to be saturated and a material having an MFR of 40 or more is used as a comparative material.
又,作為較佳之主要成分之聚丙烯之結晶化溫度(Tc)較佳為90~130℃,更佳為95~130℃,進而較佳為100~130℃。藉由設為該範圍,於發泡成形時更易冷卻固化,而可獲得微細之微胞之發泡體。再者,結晶化溫度係依據JIS-K7121進行評價。 Further, the crystallization temperature (Tc) of the polypropylene which is a preferred main component is preferably from 90 to 130 ° C, more preferably from 95 to 130 ° C, still more preferably from 100 to 130 ° C. By setting it as this range, it is easy to cool-harden at the time of foam molding, and the foam of the micro-cells can be obtained. Further, the crystallization temperature was evaluated in accordance with JIS-K7121.
較佳為對上述主成分之聚丙烯添加高熔融張力聚丙烯。高熔融張力聚丙烯於200℃時之熔融張力較佳為5~50 cN,更佳為20~40 cN,進而較佳為25~35 cN。於進行添加之情形時,高熔融張力聚丙烯之熔解溫度相對於主要成分之熔解溫度較佳為±10℃之範圍,高熔融張力聚丙烯之結晶化溫度相對於主要成分之結晶化溫度較佳為±25℃,更佳為±20℃。若熔解溫度超出上述範圍,則有可能於將複數種材料混煉時產生分散不良,若結晶溫度超出上述範圍,則有可能使藉由發泡而氣泡成長之熔融樹脂冷卻固化 之溫度變得不均勻而無法獲得微細之氣泡直徑。熔解溫度、結晶化溫度係以JIS-K7121為參考而算出。上述高熔融張力聚丙烯可使用市售者,具體而言可列舉SunAllomer公司之「HMS-PP」、Japan Polypropylene公司之「NEWFOAMER」等。高熔融張力聚丙烯相對於熱塑性樹脂組合物之占最多比例(重量基準)之成分100重量份,較佳為1~50重量份,更佳為10~40重量份,進而較佳為20~30重量份。藉由使用表現高熔融張力之聚丙烯,而使熱塑性樹脂組合物之應變硬化性增加,且抑制成形時之氣泡之合一,從而可獲得微胞細小之獨立氣泡體。尤其是藉由選擇無規聚丙烯作為熱塑性樹脂組合物之主要成分,且組合高熔融張力聚丙烯而使用,可獲得更加微細之微胞。 It is preferred to add a high melt tension polypropylene to the polypropylene of the above main component. The melt tension of the high melt tension polypropylene at 200 ° C is preferably from 5 to 50 cN, more preferably from 20 to 40 cN, and still more preferably from 25 to 35 cN. In the case of the addition, the melting temperature of the high melt tension polypropylene is preferably in the range of ±10 ° C with respect to the melting temperature of the main component, and the crystallization temperature of the high melt tension polypropylene is preferably relative to the crystallization temperature of the main component. It is ±25 ° C, more preferably ± 20 ° C. When the melting temperature is outside the above range, there is a possibility that dispersion is poor when kneading a plurality of materials. If the crystallization temperature is outside the above range, the molten resin which is bubbled by foaming may be cooled and solidified. The temperature becomes uneven and a fine bubble diameter cannot be obtained. The melting temperature and the crystallization temperature were calculated in accordance with JIS-K7121. The high-melt-tensile polypropylene can be used commercially, and specifically, "HMS-PP" of SunAllomer Co., Ltd., "NEWFOAMER" of Japan Polypropylene Co., Ltd., etc. are mentioned. The high melt tension polypropylene is preferably from 1 to 50 parts by weight, more preferably from 10 to 40 parts by weight, even more preferably from 20 to 30 parts by weight based on 100 parts by weight of the component of the thermoplastic resin composition. Parts by weight. By using polypropylene which exhibits high melt tension, the strain hardenability of the thermoplastic resin composition is increased, and the combination of the bubbles at the time of molding is suppressed, whereby a closed cell body having a small cell size can be obtained. In particular, by selecting atactic polypropylene as a main component of the thermoplastic resin composition and using a combination of high melt tension polypropylene, it is possible to obtain finer microcapsules.
亦可對上述聚丙烯添加聚乙烯。於使用之情形時,較佳為使用聚乙烯中之低密度聚乙烯。低密度聚乙烯之密度較佳為910~940 kg/m3,更佳為915~938 kg/m3,進而較佳為920~935 kg/m3。低密度聚乙烯之含量相對於熱塑性樹脂組合物之占最多比例(重量基準)之成分100重量份,較佳為20~80重量份,更佳為25~60重量份,進而較佳為30~50重量份。藉由含有低密度聚乙烯,而可獲得柔軟性,並且易於改善應變。 Polyethylene may also be added to the above polypropylene. In the case of use, it is preferred to use a low density polyethylene in polyethylene. The density of the low density polyethylene is preferably 910 to 940 kg/m 3 , more preferably 915 to 938 kg/m 3 , and further preferably 920 to 935 kg/m 3 . The content of the low-density polyethylene is preferably from 20 to 80 parts by weight, more preferably from 25 to 60 parts by weight, even more preferably from 30 to 60 parts by weight, based on 100 parts by weight of the component of the thermoplastic resin composition. 50 parts by weight. By containing low density polyethylene, flexibility can be obtained and strain can be easily improved.
聚烯烴樹脂之含量相對於熱塑性樹脂組合物整體100重量份,較佳為30~80重量份,更佳為40~80重量份,進而較佳為45~80重量份,進而更佳為60~80重量份。於未達30重量份即彈性體(例如乙烯丙烯橡膠)或發泡成核劑(例如 二氧化矽)等之含量較多之情形時,存在產生放氣而發泡倍率變低(亦即密度變高)因而欠佳(彈性體較多之情形),又,所獲得之發泡體變硬之情況(發泡成核劑較多之情形)。另一方面,於超過80重量份之情形時,所獲得之發泡體無法獲得柔軟性而作為襯墊欠佳。聚丙烯之含量相對於聚烯烴樹脂整體100重量份,較佳為30~90重量份,更佳為40~90重量份,進而較佳為70~90重量份,特佳為75~85重量份。若為該範圍內(30~90重量份),則可獲得發泡倍率更高且柔軟性更優異之襯墊。又,作為較佳之主要成分之聚丙烯之含量相對於熱塑性樹脂組合物整體100重量份,較佳為20~80重量份,更佳為30~70重量份,進而較佳為30~60重量份。若為該範圍內(20~80重量份),則可獲得發泡倍率更高且柔軟性更優異之襯墊。 The content of the polyolefin resin is preferably from 30 to 80 parts by weight, more preferably from 40 to 80 parts by weight, still more preferably from 45 to 80 parts by weight, still more preferably from 60 to 80 parts by weight, based on 100 parts by weight of the total amount of the thermoplastic resin composition. 80 parts by weight. Less than 30 parts by weight, that is, an elastomer (such as ethylene propylene rubber) or a foaming nucleating agent (for example) In the case where the content of cerium oxide or the like is large, there is a case where deflation occurs and the expansion ratio becomes low (that is, the density becomes high), which is unsatisfactory (in the case where the elastomer is large), and the obtained foam Hardening (in the case of more foaming nucleating agents). On the other hand, in the case of more than 80 parts by weight, the obtained foam cannot obtain flexibility and is not preferable as a liner. The content of the polypropylene is preferably 30 to 90 parts by weight, more preferably 40 to 90 parts by weight, still more preferably 70 to 90 parts by weight, particularly preferably 75 to 85 parts by weight, based on 100 parts by weight of the total of the polyolefin resin. . When it is this range (30-90 weight part), it can obtain the cushioning which has a higher expansion ratio and is more excellent in flexibility. Further, the content of the polypropylene which is a preferred main component is preferably 20 to 80 parts by weight, more preferably 30 to 70 parts by weight, still more preferably 30 to 60 parts by weight, based on 100 parts by weight of the total amount of the thermoplastic resin composition. . When it is this range (20-80 weight part), it can obtain the cushioning which has a higher expansion ratio and is more excellent in flexibility.
此外,熱塑性樹脂材料中亦可含有彈性體、顏料、抗氧化劑、發泡成核劑、結晶成核劑等。 Further, the thermoplastic resin material may contain an elastomer, a pigment, an antioxidant, a foaming nucleating agent, a crystal nucleating agent, and the like.
作為彈性體,並無特別限定,可列舉苯乙烯系彈性體或乙烯丙烯二烯橡膠或乙烯丙烯橡膠等熱塑性彈性體。藉由含有該等彈性體,而發揮對發泡體賦予柔軟性之效果。彈性體之MFR並無特別限定,JIS-K7210所規定之230℃、2.16 kgf時之MFR較佳為0~5 g/10分鐘,更佳為0~4 g/10分鐘,進而較佳為0~3 g/10分鐘。該等彈性體之含量相對於熱塑性樹脂組合物之占最多比例(重量基準)之成分100重量份,較佳為0.1~80重量份,更佳為20~75重量份,進而較佳為40~60重量份。 The elastomer is not particularly limited, and examples thereof include thermoplastic elastomers such as a styrene elastomer or an ethylene propylene diene rubber or an ethylene propylene rubber. By containing these elastomers, the effect of imparting flexibility to the foam is exhibited. The MFR of the elastomer is not particularly limited, and the MFR at 230 ° C and 2.16 kgf as specified in JIS-K7210 is preferably 0 to 5 g/10 min, more preferably 0 to 4 g/10 min, and further preferably 0. ~3 g/10 minutes. The content of the elastomer is preferably from 0.1 to 80 parts by weight, more preferably from 20 to 75 parts by weight, even more preferably from 40 to 75 parts by weight, based on 100 parts by weight of the component of the thermoplastic resin composition. 60 parts by weight.
作為顏料,並無特別限定,例如,可列舉氧化鈦等。顏料之含量相對於熱塑性樹脂組合物之占最多比例(重量基準)之成分100重量份,較佳為0.1~25重量份,更佳為0.1~20重量份,進而較佳為0.1~15重量份。 The pigment is not particularly limited, and examples thereof include titanium oxide and the like. The content of the pigment is preferably 0.1 to 25 parts by weight, more preferably 0.1 to 20 parts by weight, still more preferably 0.1 to 15 parts by weight, per 100 parts by weight of the component of the thermoplastic resin composition. .
作為抗氧化劑,並無特別限定,例如,可列舉ADEKA股份有限公司製造之Adekastab AO-60或BASF Japan股份有限公司製造之Irganox1010等作為酚系抗氧化劑。抗氧化劑之含量相對於熱塑性樹脂組合物之占最多比例(重量基準)之成分100重量份,較佳為0.1~3.0重量份,更佳為0.1~1.0重量份,進而較佳為0.15~0.5重量份。 The antioxidant is not particularly limited, and examples thereof include Adekastab AO-60 manufactured by ADEKA Co., Ltd. or Irganox 1010 manufactured by BASF Japan Co., Ltd. as a phenolic antioxidant. The content of the antioxidant is preferably 0.1 to 3.0 parts by weight, more preferably 0.1 to 1.0 part by weight, still more preferably 0.15 to 0.5 part by weight based on 100 parts by weight of the component of the thermoplastic resin composition. Share.
作為發泡成核劑,並無特別限定,例如,可列舉二氧化矽、滑石等。藉由使用發泡成核劑,可調整所獲得之氣泡尺寸。發泡成核劑之含量並無特別限定,例如,相對於熱塑性樹脂組合物之占最多比例(重量基準)之成分100重量份,較佳為0.1~20重量份,更佳為1~15重量份,進而較佳為2~10重量份。若未達0.1重量份,則發泡變得易於在任意位置同時多發地產生。於此情形時,若存在集中地產生發泡之位置,則有可能於該位置上氣泡彼此合一而形成較粗之微胞(直徑較大之氣泡)。另一方面,若超過10重量份,則存在所獲得之發泡體之柔軟性受損之情形。 The foaming nucleating agent is not particularly limited, and examples thereof include cerium oxide and talc. The bubble size obtained can be adjusted by using a foaming nucleating agent. The content of the foaming nucleating agent is not particularly limited. For example, it is preferably 0.1 to 20 parts by weight, more preferably 1 to 15 parts by weight based on 100 parts by weight of the component of the thermoplastic resin composition. The portion is further preferably 2 to 10 parts by weight. If it is less than 0.1 part by weight, foaming becomes easy to occur at the same time at any position. In this case, if there is a position where foaming occurs intensively, it is possible that the bubbles are combined with each other at this position to form coarser cells (bubbles having a larger diameter). On the other hand, when it exceeds 10 parts by weight, the softness of the obtained foam may be impaired.
作為結晶成核劑,並無特別限定,例如,可列舉新日本理化股份有限公司之Gel All或ADEKA股份有限公司之Adekastab NA11等。 The crystal nucleating agent is not particularly limited, and examples thereof include Gel All of New Japan Physical and Chemical Co., Ltd., Adekastab NA11 of ADEKA Co., Ltd., and the like.
本發明之襯墊所使用之發泡劑係經過如下步驟而製造: 使熱塑性樹脂組合物熔融;對熔融之熱塑性樹脂組合物含浸發泡劑;及將含浸有上述發泡劑之熱塑性樹脂組合物減壓而獲得上述發泡體。此處,上述發泡劑為超臨界二氧化碳。以下,對各步驟進行詳細說明。 The foaming agent used in the liner of the present invention is produced by the following steps: The thermoplastic resin composition is melted; the molten thermoplastic resin composition is impregnated with a foaming agent; and the thermoplastic resin composition impregnated with the foaming agent is decompressed to obtain the foam. Here, the above blowing agent is supercritical carbon dioxide. Hereinafter, each step will be described in detail.
首先,使熱塑性樹脂組合物熔融。更詳細而言,將熱塑性樹脂組合物之各成分投入至單獨或串聯型(連結有2台擠出機之類型)之擠出機中,並於熔融區域內熔解。再者,該步驟中所使用之熱塑性樹脂材料較佳為使用預先使用2軸擠出機、捏合機(kneader)、班伯裏混煉機(Banbury mixer)等樹脂混合機械將各成分熔融混合而顆粒化者。 First, the thermoplastic resin composition is melted. More specifically, each component of the thermoplastic resin composition is placed in an extruder of a single type or a tandem type (a type in which two extruders are connected), and is melted in a molten region. Further, it is preferred that the thermoplastic resin material used in this step is melt-mixed by using a resin mixing machine such as a 2-axis extruder, a kneader or a Banbury mixer. Granulated.
於其後之步驟中,對熔融之熱塑性樹脂組合物含浸發泡劑。此處所使用之發泡劑為超臨界二氧化碳。自設置於熔融區域附近之注入噴嘴(injection nozzle)將藉由氣體供給機升壓而變為超臨界狀態之二氧化碳噴出至擠出機內,並使其熔解於經熔融之熱塑性樹脂組合物中。將超臨界二氧化碳導入至擠出機中,並使其熔解於熔融之熱塑性樹脂組合物中而成為發泡劑熔解於熱塑性樹脂組合物之狀態。 In the subsequent step, the molten thermoplastic resin composition is impregnated with a foaming agent. The blowing agent used herein is supercritical carbon dioxide. The injection nozzle provided in the vicinity of the melting zone ejects carbon dioxide which has been supercharged by the gas supply to the supercritical state, and is melted into the melted thermoplastic resin composition. The supercritical carbon dioxide is introduced into an extruder and melted in the molten thermoplastic resin composition to be in a state in which the foaming agent is melted in the thermoplastic resin composition.
藉由使用此處所使用之超臨界二氧化碳,而可使發泡體之微胞徑微細化。又,超臨界二氧化碳之壓力必需為7.3 MPa以上,更佳為8 MPa以上,進而較佳為9 MPa以上。再者,雖然上限並無特別限定,但例如為20 MPa以下。 By using the supercritical carbon dioxide used herein, the micropore diameter of the foam can be made fine. Further, the pressure of the supercritical carbon dioxide must be 7.3 MPa or more, more preferably 8 MPa or more, and still more preferably 9 MPa or more. Further, although the upper limit is not particularly limited, it is, for example, 20 MPa or less.
於接下來之步驟中,將含浸有上述發泡劑之熱塑性樹脂組合物減壓而獲得上述發泡體。於擠出機中對熔融之熱塑性樹脂組合物導入超臨界二氧化碳且設為溫度31℃以上、 壓力7.3 MPa以上之狀態,至自模具口噴出並於大氣壓下減壓而發泡期間維持該狀態,藉此可獲得具有較小且細膩之發泡微胞之發泡體。再者,藉由設為溫度31℃以上、壓力7.3 MPa以上,而可使二氧化碳保持超臨界狀態,故而可將熱塑性樹脂組合物與超臨界二氧化碳均勻性良好地混合。溫度之上限值並無特別限定,例如,可設定熱塑性樹脂組合物不進行熱分解之程度之溫度,例如為300℃。 In the next step, the thermoplastic resin composition impregnated with the above foaming agent is decompressed to obtain the above-mentioned foam. Introducing supercritical carbon dioxide into the molten thermoplastic resin composition in an extruder and setting the temperature to 31 ° C or higher. The state of the pressure of 7.3 MPa or more is maintained until the state is ejected from the die port and depressurized under atmospheric pressure to maintain the state, whereby a foam having small and fine foamed micelles can be obtained. Further, by setting the temperature to 31 ° C or higher and the pressure to 7.3 MPa or more, the carbon dioxide can be kept in a supercritical state, so that the thermoplastic resin composition and the supercritical carbon dioxide can be uniformly mixed with each other. The upper limit of the temperature is not particularly limited. For example, the temperature at which the thermoplastic resin composition is not thermally decomposed can be set, for example, 300 °C.
又,於熱塑性樹脂組合物與超臨界二氧化碳之混合中,較佳為使用連結有2台以上之擠出機(串聯型擠出機),使進行混合擠出處理之步驟線長更長,且使混合物之溫度降低等而進行溫度調整,以便不會釋放至大氣中而成為上述壓力以下。將要發泡之前之熱塑性樹脂組合物較佳為具有該組合物之流動點附近之溫度。藉由將溫度保持得較低,而使發泡前後之壓力差變大,產生大量氣泡成長核,從而可獲得細膩之發泡體。又,於發泡後,可使熱塑性樹脂組合物更快速地冷卻、固化。因此,可於早期停止氣泡之成長,而易於獲得微胞徑較小之獨立氣泡之發泡體。 Further, in the mixing of the thermoplastic resin composition and the supercritical carbon dioxide, it is preferred to use two or more extruders (tandem type extruders), and the step of performing the mixed extrusion treatment is longer, and The temperature of the mixture is lowered or the like to adjust the temperature so as not to be released into the atmosphere to be equal to or lower than the above pressure. The thermoplastic resin composition before being foamed preferably has a temperature near the pour point of the composition. By keeping the temperature low, the pressure difference before and after the foaming becomes large, and a large number of bubble growth nuclei are generated, whereby a fine foam can be obtained. Further, after foaming, the thermoplastic resin composition can be cooled and solidified more rapidly. Therefore, the growth of the bubbles can be stopped at an early stage, and the foam of the closed cells having a small micropore diameter can be easily obtained.
擠出機中之模具構造並無特別限定,可列舉T字模、圓形模具(circular die)。該等之中,為了獲得厚度均勻之發泡片材,較佳為圓形模具。於使用圓形模具之情形時可獲得圓筒狀之發泡體,但藉由將一邊切開而可成形為片狀。如此,於擠出成形時,可藉由選擇T字模直接地連續成形長條片狀發泡體,或者藉由選擇圓形模具經過圓筒狀之發泡體而連續成形長條片狀發泡體。進而,藉由衝裁加工等 自上述長條片狀發泡體切下而成為襯墊之形狀。 The mold structure in the extruder is not particularly limited, and examples thereof include a T-die and a circular die. Among these, in order to obtain a foamed sheet having a uniform thickness, a circular mold is preferred. In the case of using a circular mold, a cylindrical foam can be obtained, but it can be formed into a sheet shape by cutting one side. Thus, at the time of extrusion molding, the long sheet-like foam can be directly formed by directly selecting a T-shaped mold, or the continuous sheet-shaped foam can be continuously formed by selecting a circular mold through a cylindrical foam. body. Further, by punching, etc. The strip-shaped foam was cut out to form a shape of a liner.
上述發泡體係用作飲食品容器用襯墊。圖1係本發明之飲食品容器用襯墊之概略構成圖。本發明之飲食品容器用襯墊1包含具有圓盤狀之本體11、及形成於該本體之中心之圓形孔13。由於該襯墊由使用上述超臨界二氧化碳進行發泡而成之發泡體構成,故而無臭氣或黑色之殘留物殘留,而成為清潔之襯墊。藉由選擇超臨界二氧化碳作為發泡劑,而使所獲得之發泡體之微胞較細,進而該等微胞為獨立氣泡,故而具有適度之柔軟性與較高之液密性。 The above foaming system is used as a liner for food and beverage containers. Fig. 1 is a schematic configuration diagram of a liner for a food and beverage container of the present invention. The food product container liner 1 of the present invention comprises a disk-shaped body 11 and a circular hole 13 formed in the center of the body. Since the liner is composed of a foam obtained by foaming using the above-described supercritical carbon dioxide, the odorless or black residue remains and becomes a clean liner. By selecting supercritical carbon dioxide as a foaming agent, the obtained microcapsules of the foam are finer, and the microcells are independent bubbles, so that they have moderate flexibility and high liquid tightness.
又,本發明之飲食品容器用襯墊1較佳為用於液體容器之蓋。圖2係本發明之液體容器用蓋的概略構成圖。圖2(a)係平面圖,圖2(b)係立體圖,圖2(c)係AA'剖面圖。 Moreover, the liner 1 for food and beverage containers of the present invention is preferably a lid for a liquid container. Fig. 2 is a schematic configuration diagram of a lid for a liquid container of the present invention. 2(a) is a plan view, FIG. 2(b) is a perspective view, and FIG. 2(c) is a cross-sectional view taken along line AA'.
液體容器用蓋2包括:圓盤形之底部21;圓筒狀外壁23,其覆蓋該底部之外周,且與上述底部液密性地接合;圓筒狀內壁25,其設置於上述底部之較上述圓筒狀外壁更靠內側,且與上述底部液密性地接合;液體導出孔27,其設置於上述底部之圓筒狀內壁內側;及襯墊1,其設置於上述底部之上述外壁及內壁之間部分。此處,該襯墊1係上文所說明之本發明之襯墊。 The liquid container cover 2 includes a disc-shaped bottom portion 21, a cylindrical outer wall 23 covering the outer periphery of the bottom portion, and being fluid-tightly engaged with the bottom portion; a cylindrical inner wall 25 disposed at the bottom portion The inner side of the cylindrical outer wall is fluid-tightly joined to the bottom portion; the liquid lead-out hole 27 is disposed inside the cylindrical inner wall of the bottom portion; and the gasket 1 is disposed on the bottom portion Part between the outer wall and the inner wall. Here, the liner 1 is the liner of the present invention as described above.
液體容器用蓋2係安裝於飲水機之瓶罐用之液體容器3等之開口部而使用。圖3係表示將本發明之液體容器用蓋2安裝於液體容器3之開口部之狀態的剖面圖。液體容器3包含收納液體之液體容器本體31、以及相對於設置於上述底部之襯墊及上述蓋之圓筒狀外壁液密性地連接之開口部33。 此處,將液體容器之開口部之前端33a以相對於襯墊1密接之方式安裝,而成為如液體容器本體中之液體不會自開口部33與圓筒狀內壁外23之間漏出之構造。 The lid 2 for a liquid container is attached to an opening of a liquid container 3 or the like for a bottle of a water dispenser. 3 is a cross-sectional view showing a state in which the lid 2 for a liquid container of the present invention is attached to an opening of the liquid container 3. The liquid container 3 includes a liquid container body 31 that houses a liquid, and an opening portion 33 that is fluid-tightly connected to a gasket provided on the bottom portion and a cylindrical outer wall of the lid. Here, the opening end 33a of the opening of the liquid container is attached so as to be in close contact with the gasket 1, so that the liquid in the liquid container body does not leak from between the opening 33 and the outer wall 23 of the cylindrical inner wall. structure.
如圖4所示,將安裝有液體容器用蓋2之液體容器3安裝於飲水機本體4而使用。於飲水機本體4中包含經由液體容器用蓋2而安裝液體容器3之安裝口41、及將自該安裝口輸送之液體放出之水龍頭42。更詳細而言,經由液體容器用蓋2之液體導出孔27,將液體容器內之液體供給至飲水機之安裝口41。如此,成為如下構造:即便將液體容器之開口部朝下安裝於飲水機本體,藉由具有襯墊,液體亦不會外漏。 As shown in FIG. 4, the liquid container 3 to which the liquid container lid 2 is attached is attached to the water dispenser main body 4, and it is used. The water dispenser main body 4 includes a mounting opening 41 through which the liquid container 3 is attached via the liquid container cover 2, and a faucet 42 for discharging the liquid conveyed from the mounting opening. More specifically, the liquid in the liquid container is supplied to the mounting port 41 of the water dispenser via the liquid outlet hole 27 of the lid 2 for the liquid container. Thus, the structure is such that even if the opening of the liquid container is attached downward to the water dispenser body, the liquid does not leak out by the gasket.
利用日本製鋼所製造之2軸擠出機將於作為主要成分之JIS-K7120所規定之230℃、2.16 kgf時之MFR為0.5 g/10分鐘之無規聚丙烯100重量份中進而混合JIS-K7121所規定之熔解溫度相對於主要成分(上述無規聚丙烯)為負10℃以內之高熔融張力聚丙烯(熔融張力26 cN)25重量份、密度為931 kg/m3之聚乙烯30重量份、JIS-K7210所規定之230℃、2.16 kgf之MFR為0(亦即不流動)之乙烯丙烯橡膠55重量份、作為發泡成核劑之二氧化矽9重量份、進而顏料3重量份而成之熱塑性樹脂組合物熔融、調製,且於溫度31℃以上、壓力7.3 MPa以上之條件下含浸超臨界二氧化碳之後,擠出熔融材料而製造發泡片材。所獲得之發泡體片材 之氣泡形狀為獨立氣泡。發泡體密度為60 kg/m3。又,藉由SEM(Scanning Electron Microscope,掃描式電子顯微鏡)測定相對於發泡片材之擠出方向為垂直方向之剖面(圖5),於任意之8點,測定1 mm×1 mm之範圍內所包含之微胞之數量,並算出平均值後,結果微胞之數量為250個/mm2。又,自該剖面中算出微胞之尺寸(直徑)之分佈後,結果50 μm以下之氣泡之個數比率為60%,100 μm以下之氣泡之個數比率為84%(圖6)。自該發泡體片材切下而製造實施例1之襯墊。 A two-axis extruder manufactured by Nippon Steel Co., Ltd. is further mixed with JIS- in a 100 parts by weight of atactic polypropylene having an MFR of 0.5 g/10 minutes at 230 ° C and 2.16 kgf as the main component of JIS-K7120. The melting temperature specified by K7121 is 25 parts by weight of a high melt tension polypropylene (melt tension 26 cN) within a negative 10 ° C relative to the main component (the above-mentioned random polypropylene), and a weight of 931 kg/m 3 of polyethylene 30 5 parts by weight of ethylene propylene rubber of 230 ° C and 2.16 kgf as defined in JIS-K7210, which is 0 (that is, no flow), 9 parts by weight of cerium oxide as a foaming nucleating agent, and further 3 parts by weight of pigment The obtained thermoplastic resin composition is melted and prepared, and after impregnating supercritical carbon dioxide under the conditions of a temperature of 31 ° C or higher and a pressure of 7.3 MPa or more, the molten material is extruded to produce a foamed sheet. The bubble shape of the obtained foam sheet was an independent bubble. The foam density was 60 kg/m 3 . Further, a cross section perpendicular to the extrusion direction of the foamed sheet (Fig. 5) was measured by SEM (Scanning Electron Microscope), and a range of 1 mm × 1 mm was measured at any eight points. After the number of micelles contained therein was calculated and the average value was calculated, the number of micelles was 250/mm 2 . Further, when the distribution of the size (diameter) of the micelles was calculated from the cross section, the ratio of the number of bubbles of 50 μm or less was 60%, and the ratio of the number of bubbles of 100 μm or less was 84% (Fig. 6). The liner of Example 1 was produced by cutting the foam sheet.
除按照表1中之組成以外,以與實施例1相同之方法,製造實施例2~5之襯墊。將結果示於表1中。 The liners of Examples 2 to 5 were produced in the same manner as in Example 1 except that the compositions in Table 1 were used. The results are shown in Table 1.
均聚丙烯:MFR=0.5 g/10分鐘,結晶化率=58%,結晶化溫度=113℃,熔解溫度=172℃ Homopolymer: MFR = 0.5 g/10 min, crystallization rate = 58%, crystallization temperature = 113 ° C, melting temperature = 172 ° C
無規聚丙烯:MFR=0.5 g/10分鐘,結晶化率=48%,結晶化溫度=104℃,熔解溫度=152℃ Atactic polypropylene: MFR = 0.5 g/10 min, crystallization rate = 48%, crystallization temperature = 104 ° C, melting temperature = 152 ° C
高熔融張力聚丙烯(R-PP系):熔融張力=26 cN,熔解溫度=146℃,結晶化溫度=116℃ High melt tension polypropylene (R-PP system): melt tension = 26 cN, melting temperature = 146 ° C, crystallization temperature = 116 ° C
高熔融張力聚丙烯(H-PP系):熔融張力=32 cN,熔解溫度=164℃,結晶化溫度=131℃ High melt tension polypropylene (H-PP system): melt tension = 32 cN, melting temperature = 164 ° C, crystallization temperature = 131 ° C
聚乙烯:密度931 kg/m3 Polyethylene: density 931 kg/m 3
又,作為比較例,對於藉由化學發泡劑(永和化成工業(股)製造之VINYFOR AC#3,分解溫度210℃)使低密度聚乙烯發泡而製造之發泡體觀察剖面後,結果剖面中之微胞之數量為101個/mm2。又,算出微胞之尺寸(直徑)之分佈後,結果50 μm以下之氣泡為19%,100 μm以下之氣泡為34%。 Further, as a comparative example, the foam was observed by foaming a low-density polyethylene by a chemical foaming agent (VINYFOR AC #3 manufactured by Yonghe Chemical Industry Co., Ltd., decomposition temperature: 210 ° C), and the result was observed. The number of micelles in the section was 101/mm 2 . Further, when the distribution of the size (diameter) of the micelles was calculated, the bubbles of 50 μm or less were 19%, and the bubbles of 100 μm or less were 34%.
對於上述化學發泡劑,於以氬氣250 ml/min且以升溫速度20℃/min自室溫升溫至550℃之條件下測定熱重量變化後,結果產生有約1%之殘渣(碳化物)(圖7)。 With respect to the above chemical foaming agent, after measuring the thermogravimetric change under the conditions of argon gas of 250 ml/min and a temperature increase of 20 ° C/min from room temperature to 550 ° C, about 1% of the residue (carbide) was produced. (Figure 7).
又,對於化學發泡劑(永和化成工業(股)製造之VINYFOR AC#3,分解溫度210℃)單體,以氬氣250 ml/min且以升溫速度20℃/min使其自室溫升溫至210℃(約9分鐘),其後以等溫保持30分鐘而測定熱重量變化後,結果產生有20%之殘渣(圖8)。 Further, the monomer for chemical foaming agent (VINYFOR AC #3 manufactured by Yonghe Chemical Industry Co., Ltd., decomposition temperature: 210 ° C) was heated from room temperature to 250 ° C / min at an increase rate of 20 ° C / min. After 210 ° C (about 9 minutes), the thermogravimetric change was measured by isothermal holding for 30 minutes, and as a result, 20% of the residue was produced (Fig. 8).
再者,圖7中,橫軸表示溫度(℃),右縱軸表示重量損失(%),圖8中,橫軸表示自升溫開始經過之時間(min),右縱軸表示重量損失(%)。由以上之結果可知:化學發泡劑係即便加熱至分解溫度以上,藉由使用其亦會產生熱分解所致之殘渣。 Further, in Fig. 7, the horizontal axis represents temperature (°C), and the right vertical axis represents weight loss (%). In Fig. 8, the horizontal axis represents the time elapsed since the temperature rise (min), and the right vertical axis represents the weight loss (%). ). From the above results, it is understood that the chemical foaming agent is generated by thermal decomposition even if it is heated to a temperature higher than the decomposition temperature.
又,關於藉由機械發泡法(mechanical frothing process)進行發泡而成之發泡體,並非獨立氣泡,而係含有較多部分連通之氣泡之半連通氣泡,因而液密性不優異。 In addition, the foam which is foamed by the mechanical frothing process is not a closed cell, but is a semi-connected bubble containing a large number of connected bubbles, and thus is not excellent in liquid tightness.
根據本發明,由於不使用化學發泡劑,故而可提供安全性較高之飲食品容器用襯墊。 According to the present invention, since the chemical foaming agent is not used, it is possible to provide a liner for food and beverage containers having high safety.
1‧‧‧飲食品容器用襯墊 1‧‧‧Patient for food and beverage containers
2‧‧‧液體容器用蓋 2‧‧‧Liquid for liquid containers
3‧‧‧液體容器 3‧‧‧Liquid container
4‧‧‧飲水機本體 4‧‧‧Water dispenser body
11‧‧‧本體 11‧‧‧Ontology
13‧‧‧圓形孔 13‧‧‧round hole
21‧‧‧底部 21‧‧‧ bottom
23‧‧‧圓筒狀外壁 23‧‧‧Cylindrical outer wall
25‧‧‧圓筒狀內壁 25‧‧‧Cylindrical inner wall
27‧‧‧液體導出孔 27‧‧‧Liquid outlet hole
31‧‧‧液體容器本體 31‧‧‧Liquid container body
33‧‧‧開口部 33‧‧‧ openings
33a‧‧‧前端 33a‧‧‧ front end
41‧‧‧安裝口 41‧‧‧Installation port
42‧‧‧水龍頭 42‧‧‧Water tap
圖1係本發明之飲食品容器用襯墊之概略構成圖。 Fig. 1 is a schematic configuration diagram of a liner for a food and beverage container of the present invention.
圖2係本發明之液體容器用蓋之概略構成圖,詳細而言,圖2(a)係平面圖,圖2(b)係立體圖,圖2(c)係AA'剖面圖。 2 is a schematic configuration view of a lid for a liquid container according to the present invention. In detail, FIG. 2(a) is a plan view, FIG. 2(b) is a perspective view, and FIG. 2(c) is a cross-sectional view taken along line AA'.
圖3係表示將本發明之液體容器用蓋2安裝於液體容器3之開口部之狀態的剖面圖。 3 is a cross-sectional view showing a state in which the lid 2 for a liquid container of the present invention is attached to an opening of the liquid container 3.
圖4係表示將安裝有液體容器用蓋2之液體容器3安裝於飲水機本體4而使用之情況之圖。 Fig. 4 is a view showing a state in which the liquid container 3 to which the liquid container lid 2 is attached is attached to the water dispenser body 4.
圖5係實施例1之發泡體之剖面之SEM照片(A~D)。 Fig. 5 is a SEM photograph (A to D) of a cross section of the foam of Example 1.
圖6係實施例1之發泡體之氣泡直徑之個數分佈。 Fig. 6 is a distribution of the number of bubble diameters of the foam of Example 1.
圖7係比較例中所使用之發泡體之熱分解實驗之資料。 Fig. 7 is a view showing the thermal decomposition test of the foam used in the comparative example.
圖8係比較例中所使用之發泡劑之熱分解實驗之資料。 Fig. 8 is a view showing the thermal decomposition test of the foaming agent used in the comparative example.
1‧‧‧飲食品容器用襯墊 1‧‧‧Patient for food and beverage containers
11‧‧‧本體 11‧‧‧Ontology
13‧‧‧圓形孔 13‧‧‧round hole
Claims (12)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2012/082756 WO2014097382A1 (en) | 2012-12-18 | 2012-12-18 | Packing for food and drink container, and lid for liquid container and liquid container with lid using said packing |
Publications (1)
Publication Number | Publication Date |
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TW201425157A true TW201425157A (en) | 2014-07-01 |
Family
ID=50977767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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TW101149614A TW201425157A (en) | 2012-12-18 | 2012-12-24 | Packing for food and drink container, and lid for liquid container and liquid container with lid using said packing |
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TW (1) | TW201425157A (en) |
WO (1) | WO2014097382A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111788121A (en) * | 2018-02-09 | 2020-10-16 | Ar包装***公司 | Sealing device for packaging containers |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5158986A (en) * | 1991-04-05 | 1992-10-27 | Massachusetts Institute Of Technology | Microcellular thermoplastic foamed with supercritical fluid |
US5687865A (en) * | 1991-10-08 | 1997-11-18 | Portola Packaging, Inc. | Spill-reduction cap for fluid container |
US5723507A (en) * | 1996-03-11 | 1998-03-03 | The Dow Chemical Company | Foamed gaskets made from homogeneous olefin polymers |
WO1999063019A1 (en) * | 1998-06-03 | 1999-12-09 | Trexel, Inc. | Microcellular thermoplastic elastomeric structures |
US6308849B1 (en) * | 1999-08-13 | 2001-10-30 | Charles Y. J. Kim | Cap for containers used on drinking water dispensers |
JP2001206968A (en) * | 2000-01-25 | 2001-07-31 | Mitsui Chemicals Inc | Thermoplastic resin foam |
JP4620374B2 (en) * | 2004-03-26 | 2011-01-26 | 三菱樹脂株式会社 | Method for producing resin foam molded body and resin foam molded body |
JP2005297983A (en) * | 2004-04-08 | 2005-10-27 | Nippon Synthetic Chem Ind Co Ltd:The | Cap liner material and its use |
JP2005335713A (en) * | 2004-05-24 | 2005-12-08 | Amekaze:Kk | Bottle container for drinking water feeding apparatus |
JP2010270228A (en) * | 2009-05-21 | 2010-12-02 | Sekisui Plastics Co Ltd | Method for producing polypropylene-based resin foam and polypropylene-based resin foam |
JP2013014364A (en) * | 2011-07-04 | 2013-01-24 | Inoac Gijutsu Kenkyusho:Kk | Packing for food and drink container and lid for liquid container and liquid container with lid using the packing |
-
2012
- 2012-12-18 WO PCT/JP2012/082756 patent/WO2014097382A1/en active Application Filing
- 2012-12-24 TW TW101149614A patent/TW201425157A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111788121A (en) * | 2018-02-09 | 2020-10-16 | Ar包装***公司 | Sealing device for packaging containers |
CN111788121B (en) * | 2018-02-09 | 2022-09-20 | Ar包装***公司 | Sealing device for packaging containers |
US11697528B2 (en) | 2018-02-09 | 2023-07-11 | GPl Systems AB | Sealing arrangement for packaging container |
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WO2014097382A1 (en) | 2014-06-26 |
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