JPH10119949A - Paper piece inserted heat insulating container - Google Patents
Paper piece inserted heat insulating containerInfo
- Publication number
- JPH10119949A JPH10119949A JP27225796A JP27225796A JPH10119949A JP H10119949 A JPH10119949 A JP H10119949A JP 27225796 A JP27225796 A JP 27225796A JP 27225796 A JP27225796 A JP 27225796A JP H10119949 A JPH10119949 A JP H10119949A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- heat insulating
- insulating container
- resin
- paper piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920005989 resin Polymers 0.000 claims abstract description 44
- 239000011347 resin Substances 0.000 claims abstract description 37
- 239000008188 pellet Substances 0.000 claims abstract description 13
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 239000002985 plastic film Substances 0.000 claims description 8
- 229920006255 plastic film Polymers 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 239000012778 molding material Substances 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000037237 body shape Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 74
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 14
- 239000011111 cardboard Substances 0.000 description 11
- 239000002651 laminated plastic film Substances 0.000 description 8
- 239000000088 plastic resin Substances 0.000 description 7
- 239000006260 foam Substances 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 229920001684 low density polyethylene Polymers 0.000 description 6
- 239000004702 low-density polyethylene Substances 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 239000010893 paper waste Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 229920006328 Styrofoam Polymers 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000008261 styrofoam Substances 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
-
- 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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
- B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
- B65D1/265—Drinking cups
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は発泡スチロールや厚
紙製の断熱容器の代替品に関するものであり、さらに詳
細には製造工程が少なく、不用となった再生困難な紙片
が使用でき、かつ強度に優れ、耐水性のある紙片インサ
ート断熱容器の提供に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substitute for a thermally insulated container made of styrene foam or cardboard. More specifically, the present invention has a small number of manufacturing steps, can use an unusable and difficult to recycle paper piece, and has excellent strength. The present invention relates to the provision of a water-resistant paper insert heat insulating container.
【０００２】[0002]
【従来の技術】従来より断熱容器として、発泡スチロー
ル製や厚紙製あるいは両面段ボールの中芯（コルゲート
紙）様の紙を厚紙でサンドした形態の積層紙からなるも
のが知られている。ここで発泡スチロール製の断熱容器
は、先ず懸濁重合法で得られたポリスチレンビーズ（球
状粒子）にペンタン等発泡剤を含浸させて発泡ポリスチ
レンビーズ（ＥＰＳ）を製造し、このＥＰＳを水蒸気で
加熱して、予備発泡粒として所定の金型内で再度加熱し
て相互に融着させて製造するのが一般的である。このよ
うに製造工程が多いこと、即ちコスト高になる問題があ
る。またこのようにして得られた発泡スチロール製の断
熱容器は、つぶれや破壊などに対する強度がないなどの
欠点がある。2. Description of the Related Art Heretofore, there has been known a heat insulating container made of laminated paper in the form of foamed styrene, cardboard, or double-sided corrugated cardboard (corrugated paper) -like paper sandwiched with cardboard. Here, the heat insulation container made of styrene foam is manufactured by first impregnating a polystyrene bead (spherical particle) obtained by a suspension polymerization method with a foaming agent such as pentane to produce a polystyrene bead (EPS), and heating the EPS with steam. In general, pre-expanded particles are produced by heating again in a predetermined mold and fusing them together. Thus, there is a problem that the number of manufacturing steps is large, that is, the cost is high. In addition, the styrene foam insulation container obtained in this manner has a drawback such as lack of strength against crushing and breaking.
【０００３】一方厚紙製の断熱容器は、両面ポリエチレ
ン加工紙を打ち抜き、ブランク板紙とし、スピンドル等
で丸め、サイドをホットエアーや高周波等で圧着する。
次いで底板を装着しホットエアー等で水など漏れない様
に完全に圧着し更に底部及び上部にカール加工を施すこ
とによって製造されるのが一般的である。このように工
程数が多いことと、液体漏れが絶対ないような管理が必
要となる。また、得られた容器は紙厚が厚くなり、つぶ
れなどに対する強度もあるとは言えない。On the other hand, a heat insulating container made of cardboard is formed by punching a double-sided polyethylene-processed paper into a blank paperboard, rounding it with a spindle or the like, and pressing the sides with hot air or high frequency.
Next, a bottom plate is usually mounted, and completely press-fitted with hot air or the like so as not to leak water, and curling is performed on the bottom and upper portions in general. As described above, a large number of steps and a management for absolutely no liquid leakage are required. Further, the obtained container has a large paper thickness and cannot be said to have strength against crushing or the like.
【０００４】また両面段ボール様の断熱容器は、両面段
ボールのライナーに相当するポリエチレン加工紙の間に
コルゲート紙をサンド接着した容器原紙を打ち抜き、以
下前記厚紙製の断熱容器とほぼ同様の工程によって製造
される。このように前記厚紙製の断熱容器よりも工程数
が多く、断熱性には優るがつぶれなどに対する強度には
劣る。またかなり厚さのある断熱容器となるなどの問題
点がある。Further, a double-faced corrugated cardboard-like heat insulating container is manufactured by punching a container base paper in which corrugated paper is sand-bonded between polyethylene-processed papers corresponding to a double-sided corrugated cardboard liner, and thereafter, substantially in the same manner as the cardboard heat insulating container. Is done. As described above, the number of processes is larger than that of the cardboard heat insulating container, and the heat insulating property is excellent, but the strength against crushing or the like is poor. In addition, there is a problem that the heat insulating container becomes quite thick.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、かかる従来
技術や従来品の問題点を解決するものであり、その課題
とするところは、製造工程数が少なく、つぶれや破壊な
どに対する強度があり、容器厚さの薄い、かつ廃棄物と
なる紙片も使用できる紙片インサート断熱容器を提供す
ることにある。SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art and the conventional products, and has as its object to reduce the number of manufacturing steps and to provide strength against crushing and destruction. Another object of the present invention is to provide a paper insert heat insulating container having a small thickness and capable of using paper waste as waste.
【０００６】[0006]
【課題を解決するための手段】本発明に於いて上記課題
を達成するために、まず請求項１の発明では、角形にカ
ットした紙片とペレット樹脂とを混合してなる成形用材
を用いて、所定の成形体状に成形されていることを特徴
とする紙片インサート断熱容器としたものである。Means for Solving the Problems In order to achieve the above object in the present invention, first, in the invention of claim 1, a molding material obtained by mixing a square-cut paper piece and a pellet resin is used. This is a paper insert heat insulating container characterized by being molded into a predetermined molded body.
【０００７】また請求項２の発明では、前記紙片が、紙
面にプラスチックフィルムラミネートもしくわ樹脂塗布
による多層構造であることを特徴とする請求項１記載の
紙片インサート断熱容器としたものである。According to a second aspect of the present invention, there is provided the paper insert heat insulating container according to the first aspect, wherein the paper piece has a multilayer structure formed by applying a plastic film laminate or a resin to the paper surface.
【０００８】また、請求項３の発明では、前記成形体
が、射出成形により得られることを特徴とする請求項１
乃至２記載の紙片インサート断熱容器としたものであ
る。[0008] According to a third aspect of the present invention, the molded body is obtained by injection molding.
3. A paper insert heat insulating container according to any one of claims 1 to 3.
【０００９】[0009]
【発明の実施の形態】以下本発明の実施の形態を図面に
より詳細に説明する。本発明の紙片インサート断熱容器
の一例として図１に示すように、角形紙片（１０）とペ
レット樹脂（１２）とを混合してなる成形用材を用い
て、所定の成形体状に成形されている紙片インサート断
熱容器（１）であって、その角形紙片（１０）が図２に
示すように紙原紙（１６）面にプラスチックフィルムも
しくは樹脂塗布膜（１４）を積層した多層構造としたも
のである。さらに紙片インサート断熱容器（１）として
の成形体が射出成形により得られるものである。Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1 as an example of the paper insert heat insulating container of the present invention, it is formed into a predetermined molded body using a molding material obtained by mixing a rectangular paper strip (10) and a pellet resin (12). As shown in FIG. 2, a paper insert heat insulating container (1) having a square paper sheet (10) having a multilayer structure in which a plastic film or a resin coating film (14) is laminated on a paper base paper (16). . Further, a molded article as the paper insert heat insulating container (1) is obtained by injection molding.
【００１０】ここで先ず紙片インサート断熱容器（１）
の製造について説明する。図３に示すようにプラスチッ
クフィルムラミネートもしくは樹脂塗布紙（１８）等を
シュレッダー（１９）または樹脂粉砕機等でカットし、
一辺が１．０ｍｍ〜５．０ｍｍ、望ましくは一辺が１．
０ｍｍ〜３．０ｍｍ、厚さ０．１８ｍｍ〜２．０ｍｍ、
望ましくは厚さ０．２８ｍｍ〜１．６８ｍｍの図２に示
す角型紙片（１０）とする。なお、形状は四角形状に限
らず、三角形状、円状等いずれでもよい。 一方ペレッ
ト樹脂（３０）を用意し、前記角形紙片（１０）とドラ
イブレンド（混合）して、スクリュー式射出成形機（４
０）のホッパー（４２）に投入される。[0010] First, a paper insert heat insulating container (1)
Will be described. As shown in FIG. 3, a plastic film laminate or a resin coated paper (18) or the like is cut with a shredder (19) or a resin crusher, etc.
One side is 1.0 mm to 5.0 mm, preferably one side is 1.0 mm.
0 mm to 3.0 mm, thickness 0.18 mm to 2.0 mm,
Desirably, it is a square paper strip (10) shown in FIG. 2 having a thickness of 0.28 mm to 1.68 mm. The shape is not limited to a quadrangle, but may be a triangle, a circle, or the like. On the other hand, a pellet resin (30) is prepared, dry-blended (mixed) with the square paper piece (10), and is then mixed with a screw-type injection molding machine (4).
0) is put into the hopper (42).
【００１１】この投入された混合物は、ヒーター（４
４）により加熱されたスクリュー（４６）の回転によっ
て、可塑化され、スプルーを介して型締めをした所望の
金型（４８）に射出される。The charged mixture is supplied to a heater (4
By the rotation of the screw (46) heated by 4), it is plasticized and injected into a desired mold (48) which has been clamped through a sprue.
【００１２】ここで使用されるプラスチックフィルムラ
ミネートもしくは樹脂塗布紙（１８）としては、印刷
業、特に紙器等の製造において発生する印刷損紙が利用
できる。このことは最近問題になっている廃棄物の再利
用に貢献することになる。すなわち樹脂等の介在しない
印刷損紙やその製品のほとんどは、再生紙の原料として
再利用されるが、プラスチックフィルムラミネート紙や
は樹脂塗布紙は、再生紙の原料としての再利用が不可能
であるため、埋め立て処分か焼却処理とせざるを得ない
現状からすれば、プラスチックフィルムラミネートもし
くは樹脂塗布紙（１８）の再利用は廃棄物問題に多大な
貢献をするものである。As the plastic film laminate or the resin coated paper (18) used here, printing waste paper generated in the printing industry, particularly in the manufacture of paper containers and the like can be used. This will contribute to the recycling of waste, which has recently become a problem. That is, most of the printed waste paper and its products without resin etc. are reused as raw materials for recycled paper, but plastic film laminated paper or resin coated paper cannot be reused as raw material for recycled paper. For this reason, the recycling of plastic film laminate or resin-coated paper (18) greatly contributes to the waste problem in the present situation where landfill or incineration is inevitable.
【００１３】この角型紙片（１０）として、樹脂を介在
しない用紙でもよいが、プラスチックフィルムラミネー
トもしくは樹脂塗布紙（１８）を使用するメリットは上
記のような廃棄物問題への貢献のほか、紙片インサート
断熱容器（１）の表面に紙が露出することが少なく、耐
水性に優れたものとなる。As this square paper piece (10), paper without resin may be used, but the advantage of using plastic film laminate or resin coated paper (18) is that it contributes to the waste problem as described above, The paper is hardly exposed on the surface of the insert heat insulating container (1), and is excellent in water resistance.
【００１４】またペレット樹脂（３０）の種類として、
図２に示す角型紙片（１０）のプラスチックフィルムも
しくは樹脂塗布膜（１４）との熱融着性の高い樹脂が射
出成形性等から望ましい。即ち同系統で軟化点等も近い
樹脂の選定により、可塑化の工程で、ペレット樹脂（３
０）と角型紙片（１０）のプラスチックフィルム又は樹
脂塗布膜（１４）との熱融着により、射出成形品の最表
面に均一に樹脂層が形成され、より良質の射出成形品を
得ることができる。例えば、プラスチックフィルム又は
樹脂塗布膜（１４）がポリエチレンの場合、ペレット樹
脂（３０）として低密度ポリエチレン（ＬＤＰＥ）、高
密度ポリエチレン（ＨＤＰＥ）、線状低密度ポリエチレ
ン（Ｌ−ＬＤＰＥ）樹脂との組み合わせがより望まし
い。またプラスチックフィルム又は樹脂塗布膜（１４）
がポリプロピレンの場合、ペレット樹脂（３０）とし
て、ランダム重合ポリプロピレン、ブロック重合ポリプ
ロピレン、ホモ重合ポリプロピレン樹脂との組み合わせ
がより望ましい。Further, as the type of the pellet resin (30),
A resin having high heat-fusibility with the plastic film or the resin coating film (14) of the square paper piece (10) shown in FIG. 2 is desirable from the viewpoint of injection moldability and the like. That is, by selecting a resin having the same softening point and the like in the same system, the pellet resin (3
0) and the plastic film or the resin coating film (14) of the square paper piece (10), a resin layer is uniformly formed on the outermost surface of the injection molded product to obtain a higher quality injection molded product. Can be. For example, when the plastic film or the resin coating film (14) is polyethylene, a combination of low density polyethylene (LDPE), high density polyethylene (HDPE), and linear low density polyethylene (L-LDPE) resin as the pellet resin (30) Is more desirable. Also plastic film or resin coating film (14)
Is a combination of a random polymerized polypropylene, a block polymerized polypropylene, and a homopolymerized polypropylene resin as the pellet resin (30).
【００１５】次に紙片インサート断熱容器（１）の断熱
性の効果について実証した。角型紙片（１０）としてポ
リエチレンフィルム両面ラミネート紙２ｍｍ角とペレッ
ト樹脂（３０）として、低密度ポリエチレン（ＬＤＰ
Ｅ）を７０対３０の割合で混合し（紙含有率５４．６
％）図４（ａ）に示す成形体片とした。比較成形体片と
して、図４（ｂ）に示すＬＤＰＥ樹脂単体の成形体片と
図４（ｃ）に示す紙繊維（１１）とＬＤＰＥ樹脂（１
２）とを混合し紙含有率５２％の成形体片を作製した。Next, the heat insulating effect of the paper insert heat insulating container (1) was verified. As a square paper piece (10), a polyethylene film double-sided laminated paper 2 mm square and a pellet resin (30) as a low density polyethylene (LDP)
E) in a ratio of 70:30 (paper content 54.6)
%) A molded product piece shown in FIG. As a comparative molded piece, a molded piece of the LDPE resin alone shown in FIG. 4B, a paper fiber (11) shown in FIG.
2) were mixed to prepare a molded piece having a paper content of 52%.
【００１６】以上３種の成形体片の熱伝導率は、図４
（ａ）の成形体片では、０．２４（ｗ−ｍ・ｋ）、
（ｂ）の成形体片では、０．４４（ｗ−ｍ・ｋ）、
（ｃ）の成形体片では、０．３６（ｗ−ｍ・ｋ）であっ
た。このことから、紙が含有することによって、熱伝導
率が小さくなり、紙繊維状のものを含有したよりもほぼ
同等の紙含有率とした角型紙片を含有させたものの方が
熱伝導率が小さくなることが実証された。すなわち角型
紙片を含有させたものが最も断熱性に優れていることが
実証された。このことは、異材質構成の界面では熱伝達
度係数で表される伝達ロスが発生することから、紙片が
異材質で多層であればある程、層の界面での熱伝達度係
数の関係で断熱効果が向上することの立証である。The thermal conductivity of the above three types of molded product pieces is shown in FIG.
In the molded piece of (a), 0.24 (wm · k),
In the molded piece of (b), 0.44 (wm · k),
In the molded piece of (c), it was 0.36 (wm · k). From this, the thermal conductivity is reduced by the inclusion of paper, and the thermal conductivity of the paper containing square paper pieces with almost the same paper content as that of the paper fibrous material is included. It has been demonstrated that it becomes smaller. That is, it was proved that the one containing the square paper pieces had the best heat insulating properties. This means that a transfer loss represented by a heat transfer coefficient occurs at an interface of a different material configuration. This is evidence that the heat insulation effect is improved.
【００１７】以上のように、本発明の紙片インサート断
熱容器（１）は、発泡スチロールの代替として、カップ
めん容器や浅トレイなどへの用途があり、発泡スチロー
ル断熱用途代替として、クーラーボックスや冷凍容器断
熱材などへの用途がある。また耐熱カップや冷凍カップ
等の断熱カップとしての用途もある。As described above, the paper insert heat insulating container (1) of the present invention has applications for cup noodle containers and shallow trays as an alternative to styrofoam, and cooler boxes and refrigeration container insulating materials as styrofoam alternatives. There are uses for such. There are also uses as heat-insulating cups such as heat-resistant cups and frozen cups.
【００１８】[0018]
【実施例】次に本発明を実施例により、本発明を具体的
に説明する。 ＜実施例１＞以下に示す材料、射出成形条件等で、図１
に示す断熱カップを作製した。Next, the present invention will be described in detail with reference to examples. <Example 1> FIG. 1 was obtained using the following materials and injection molding conditions.
Was produced.
【００１９】 使用樹脂 ＬＤＰＥ（ｇ８０１：昭和電工（株）製） 角型紙片 ポリエチレン両面ラミネート紙 角型紙片とペレット樹脂の比率 ７０対３０（重量比） 成形体としての紙含有率 ５４．６％ 角型紙片のサイズ 約２．０ｍｍ角、厚さ約１．０ｍｍ 射出成形条件 樹脂温度 １６０°Ｃ−１５０°Ｃ−１５０°Ｃ 射出スクリュー径 ３０ｍｍφ 元圧 １４００ｋｇ／ｃｍ2 射出速度 ５５％ 圧力 ９０％（１次） ４０％（２次） 計量 ４０ｍｍResin used LDPE (g801: manufactured by Showa Denko KK) Square-shaped paper piece Polyethylene double-sided laminated paper Ratio of square-shaped paper piece to pellet resin 70 to 30 (weight ratio) Paper content as a molded product 54.6% square Injection molding conditions Resin temperature 160 ° C-150 ° C-150 ° C Injection screw diameter 30mmφ Original pressure 1400kg / cm 2 Injection speed 55% Pressure 90% ( Primary) 40% (secondary) weighing 40mm
【００２０】以上の条件で作製された断熱カップの胴面
平均厚さは、０．８０ｍｍで、熱伝導率は、０．２４
（ｗ−ｍ・ｋ）であり、発泡スチロールや厚紙製等の断
熱カップに比べ薄肉にもかかわらず、つぶれや破壊に対
する強度に優れかつ十分な断熱性を示した。またこの断
熱カップ表面に紙が露出せず、最表面に均一に樹脂が形
成されている耐水性等にも優れたものであった。The average thickness of the body surface of the heat-insulating cup manufactured under the above conditions is 0.80 mm, and the thermal conductivity is 0.24 mm.
(Wm · k), which was excellent in strength against crushing and breaking and showed sufficient heat-insulating properties despite being thinner than a heat-insulating cup made of styrene foam or cardboard. Further, the paper was not exposed on the surface of the heat-insulating cup, and the resin was formed uniformly on the outermost surface.
【００２１】[0021]
【発明の効果】本発明は以上の構成であるから、下記に
示す如き効果がある。即ち、本発明の紙片インサート断
熱容器は、角形にカットした紙片とペレット樹脂とを混
合してなる成形用材を用いて、所定の成形体に成形され
ているので、発泡スチロールや厚紙製等の断熱容器に比
べ薄肉にもかかわらず、つぶれや破壊に対する強度に優
れかつ十分な断熱性を示しす効果がある。As described above, the present invention has the following effects. That is, since the paper piece insert insulated container of the present invention is formed into a predetermined molded body using a molding material obtained by mixing a rectangularly cut paper piece and a pellet resin, the heat insulating container is made of styrene foam or cardboard. In spite of its thinness, it is excellent in strength against crushing and breaking and has an effect of showing sufficient heat insulating properties.
【００２２】また紙片が、紙の表面もしくは裏面もしく
は両面にプラスチックフィルムラミネートもしくわ樹脂
塗布によってなる多層構造であるので、層界面での熱伝
達速度で表される伝達ロスの発生から、より断熱性のあ
る容器が得られ、かつ断熱容器の表面に紙が露出せず、
最表面に均一に樹脂が形成されていて耐水性等にも優れ
た容器とする効果がある。さらに角型紙片としのプラス
チックフィルムラミネートもしくは樹脂塗布紙として、
不用となり再生困難な印刷損紙等が使用できるので廃棄
物のリサイクルに貢献できるものである。Further, since the paper piece has a multi-layer structure formed by applying a plastic film laminate or resin on the front surface, the back surface, or both surfaces of the paper, the heat loss at the interface between the layers causes a loss in heat transfer, thereby increasing the heat insulating property. With a container with no paper exposed on the surface of the heat insulating container,
The resin is uniformly formed on the outermost surface, and has an effect of making the container excellent in water resistance and the like. In addition, as plastic film laminate or resin coated paper as square paper pieces,
This can contribute to the recycling of waste, because it is possible to use printing waste paper that is unnecessary and difficult to reproduce.
【００２３】さらにまた、成形体が、射出成形により得
られので、発泡スチロール製や厚紙製等に比べ製造工程
が単純で、工程数も少なく製造コストメリットに効果が
あるものである。Furthermore, since the molded product is obtained by injection molding, the production process is simpler than that of styrene foam or cardboard, and the number of processes is small, which is advantageous in production cost merit.
【００２４】また角型紙片を混入した断熱容器とするこ
とによって、燃焼カロリーが小さくなるため、使用後の
焼却処理において、焼却炉を傷めないなどの付随的効果
がある。Further, since the calorific value of combustion is reduced by making the heat insulating container into which the square paper pieces are mixed, there is an additional effect such as not damaging the incinerator in the incineration treatment after use.
【図１】本発明の一実施例を側断面で表した説明図であ
る。FIG. 1 is an explanatory view showing an embodiment of the present invention in a side cross section.
【図２】本発明の実施の形態を示すもので、射出成形体
の製造工程を断面 で表した説明図である。FIG. 2, showing an embodiment of the present invention, is an explanatory view showing a cross section of a manufacturing process of an injection molded article.
【図３】本発明の角形紙片を説明する斜視図である。FIG. 3 is a perspective view illustrating a rectangular paper piece of the present invention.
【図４】断熱性実証試験のための成形体片の側断面図で
（ａ）は本発明の成形体片、（ｂ）と（ｃ）は、比較の
ための他の成形体片を説明する図である。FIG. 4 is a side sectional view of a molded article piece for a thermal insulation verification test, wherein (a) illustrates a molded article piece of the present invention, and (b) and (c) illustrate other molded article pieces for comparison. FIG.
１‥‥紙片インサート断熱容器 １０‥‥角型紙片 １１‥‥紙繊維 １２‥‥樹脂 １４‥‥プラスチックフィルムもしくは樹脂塗布膜 １６‥‥紙原紙 １８‥‥プラスチックフィルムラミネートもしくは樹脂
塗布紙 １９‥‥シュレッダー ３０‥‥ペレット樹脂 ４０‥‥スクリュー式射出成形機 ４２‥‥ホッパー ４４‥‥ヒーター ４６‥‥スクリュー ４８‥‥金型1 {Insulated container for paper insert 10} Square paper 11 * Paper fiber 12 * Resin 14 * Plastic film or resin coated film 16 * Paper base paper 18 * Plastic film laminate or resin coated paper 19 * Shredder 30 mm pellet resin 40 mm screw injection molding machine 42 mm hopper 44 mm heater 46 mm screw 48 mm mold
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｋ 105:20 Ｂ２９Ｌ 22:00 Continued on the front page (51) Int.Cl. 6 Identification code FI B29K 105: 20 B29L 22:00
Claims (3)
混合してなる成形用材を用いて、所定の成形体状に成形
されていることを特徴とする紙片インサート断熱容器。1. A heat-insulating container for paper-sheet inserts, which is formed into a predetermined molded body by using a molding material obtained by mixing a paper cut into a square shape and a pellet resin.
は両面にプラスチックフィルムラミネートもしくわ樹脂
塗布によってなる多層構造であることを特徴とする請求
項１記載の紙片インサート断熱容器。2. A paper insert heat insulating container according to claim 1, wherein said paper piece has a multilayer structure formed by plastic film lamination or resin coating on the front surface, the back surface or both surfaces of the paper.
とを特徴とする請求項１乃至２記載の紙片インサート断
熱容器。3. The heat insulating container for paper-sheet inserts according to claim 1, wherein said molded body is obtained by injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27225796A JP3381529B2 (en) | 1996-10-15 | 1996-10-15 | Paper insert heat insulation container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27225796A JP3381529B2 (en) | 1996-10-15 | 1996-10-15 | Paper insert heat insulation container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10119949A true JPH10119949A (en) | 1998-05-12 |
| JP3381529B2 JP3381529B2 (en) | 2003-03-04 |
Family
ID=17511334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27225796A Expired - Fee Related JP3381529B2 (en) | 1996-10-15 | 1996-10-15 | Paper insert heat insulation container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3381529B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000289731A (en) * | 1999-04-05 | 2000-10-17 | Dainippon Printing Co Ltd | Laminate, and press molded paper container |
| US7332214B2 (en) | 2000-09-13 | 2008-02-19 | Nissei Kabushiki Kaisha | Biodegradable molded article, manufacturing method thereof, and composition for expansion molding |
| US8043539B2 (en) * | 2002-03-13 | 2011-10-25 | Nissei Company, Ltd. | Process for producing biodegradable molded item and molding dies therefor |
-
1996
- 1996-10-15 JP JP27225796A patent/JP3381529B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000289731A (en) * | 1999-04-05 | 2000-10-17 | Dainippon Printing Co Ltd | Laminate, and press molded paper container |
| US7332214B2 (en) | 2000-09-13 | 2008-02-19 | Nissei Kabushiki Kaisha | Biodegradable molded article, manufacturing method thereof, and composition for expansion molding |
| US8043539B2 (en) * | 2002-03-13 | 2011-10-25 | Nissei Company, Ltd. | Process for producing biodegradable molded item and molding dies therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3381529B2 (en) | 2003-03-04 |
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