JPH0117852B2 - - Google Patents
Info
- Publication number
- JPH0117852B2 JPH0117852B2 JP59141249A JP14124984A JPH0117852B2 JP H0117852 B2 JPH0117852 B2 JP H0117852B2 JP 59141249 A JP59141249 A JP 59141249A JP 14124984 A JP14124984 A JP 14124984A JP H0117852 B2 JPH0117852 B2 JP H0117852B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- cap
- laminate
- foamed
- mold
- 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.)
- Expired
Links
- 229920005989 resin Polymers 0.000 claims description 125
- 239000011347 resin Substances 0.000 claims description 125
- 239000000853 adhesive Substances 0.000 claims description 42
- 230000001070 adhesive effect Effects 0.000 claims description 42
- 238000001125 extrusion Methods 0.000 claims description 28
- 239000006260 foam Substances 0.000 claims description 25
- 229920003002 synthetic resin Polymers 0.000 claims description 23
- 239000000057 synthetic resin Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 17
- 238000005187 foaming Methods 0.000 claims description 16
- 239000004088 foaming agent Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 229920005672 polyolefin resin Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 29
- 239000012530 fluid Substances 0.000 description 10
- 239000002826 coolant Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004604 Blowing Agent Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- 229920006248 expandable polystyrene Polymers 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- DEIGXXQKDWULML-UHFFFAOYSA-N 1,2,5,6,9,10-hexabromocyclododecane Chemical compound BrC1CCC(Br)C(Br)CCC(Br)C(Br)CCC1Br DEIGXXQKDWULML-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 241000270722 Crocodylidae Species 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- LNNWVNGFPYWNQE-GMIGKAJZSA-N desomorphine Chemical compound C1C2=CC=C(O)C3=C2[C@]24CCN(C)[C@H]1[C@@H]2CCC[C@@H]4O3 LNNWVNGFPYWNQE-GMIGKAJZSA-N 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940050176 methyl chloride Drugs 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/22—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length consisting of at least two parts of chemically or physically different materials, e.g. having different densities
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
- B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
- B29C44/505—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through a flat die
-
- 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
- B29L2009/00—Layered products
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、合成樹脂発泡積層体の製造方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing a synthetic resin foam laminate.
合成樹脂発泡積層体とは、合成樹脂から成る積
層体において、そのうちの少くとも一層が合成樹
脂の発泡体で構成されているものを云うのであ
る。合成樹脂発泡積層体のうち、中央に合成樹脂
の発泡層が位置し、両側に合成樹脂の非発泡層が
位置しているものは、表面硬度の高い軽量体とし
て、既に色々な用途に用いられている。これとは
逆に、中央に合成樹脂の非発泡層が挾まれ、両側
に合成樹脂の発泡層が位置しているもの、とくに
その発泡層が肉厚とされているものは、今まで余
り用いられなかつた。 A synthetic resin foam laminate is a laminate made of synthetic resin, at least one layer of which is made of synthetic resin foam. Among synthetic resin foam laminates, those with a foamed synthetic resin layer in the center and non-foamed synthetic resin layers on both sides have already been used for various purposes as lightweight bodies with high surface hardness. ing. On the other hand, products with a non-foamed synthetic resin layer sandwiched in the center and foamed synthetic resin layers on both sides, especially those with thick foamed layers, have not been used much until now. I couldn't help it.
この発明者は、非発泡層を中に含み、これを肉
厚の発泡層が両側から挾んでいる積層体が、とく
に有用性を発揮する場合があることに着目した。
すなわち、このような積層体は、発泡体の外観を
持ちながら内部に位置する非発泡層によつて補強
されることになり、また適正な樹脂を選択すると
非発泡層によつてガス及び液体の透過性が遮断さ
れるので、用途によつては有用なものとなること
に気付いた。そこで、このような積層体の製造を
企てた。 The inventor noticed that a laminate containing a non-foamed layer sandwiched between thick foamed layers on both sides may be particularly useful.
In other words, such a laminate has the appearance of a foam but is reinforced by the non-foamed layer located inside, and if the appropriate resin is selected, the non-foamed layer will prevent gas and liquid from flowing. It has been found that this can be useful in some applications because the permeability is blocked. Therefore, we attempted to manufacture such a laminate.
（従来技術）
合成樹脂発泡積層体を押出によつて作ること
は、既に知られている。それは、例えば特公昭48
−37752号公報及び特公昭49−44114号公報に記載
されている。しかし、これらの公報に記載する方
法は、肉厚の積層体を作るには適していない。な
ぜならば、これらの公報は、環状の押出孔から樹
脂を管として押出すことを必要としているから、
これを切開いて積層体としたのでは、得られた積
層体が復元性を持つているために反り返に、平板
として使用することができないからである。(Prior Art) It is already known to produce synthetic resin foam laminates by extrusion. For example,
It is described in Japanese Patent Publication No.-37752 and Japanese Patent Publication No. 49-44114. However, the methods described in these publications are not suitable for producing thick laminates. This is because these publications require the resin to be extruded as a tube from an annular extrusion hole.
This is because if this is cut open to form a laminate, the resulting laminate has restorability and cannot be used as a flat plate after warping.
他方、非発泡の樹脂を用いた場合には、平板状
で押出して合成樹脂積層体を作ることが知られて
いる。それは、例えば、特公昭46−28310号公報
及び特公昭49−39501号公報に記載されている。
この方法は、少くとも２個の押出機を用い、それ
ぞれの押出機に押出用扁平孔を備えた口金を付設
し、それら口金のうち、１つの大きい口金内にそ
の余の口金を収容し、扁平孔を互いに平行に向け
て固定し、上記その余の口金から押出される樹脂
を第１の口金から押出される樹脂で包んで積層体
とする方法である。 On the other hand, when a non-foamed resin is used, it is known to extrude it in the form of a flat plate to produce a synthetic resin laminate. It is described, for example, in Japanese Patent Publication No. 46-28310 and Japanese Patent Publication No. 49-39501.
This method uses at least two extruders, each extruder is equipped with a nozzle equipped with a flat extrusion hole, and one of the extruders is large, and the remaining nozzles are accommodated in the nozzle. This is a method in which the flat holes are oriented parallel to each other and fixed, and the resin extruded from the remaining nozzles is wrapped with the resin extruded from the first nozzle to form a laminate.
（発明が解決しようとする問題点）
この発明者は、非発泡の樹脂について提案され
ている上記の積層体製造方法を発泡体にそのまま
適用したが、良好な積層体は得られなかつた。す
なわち、上記大きい口金内に発泡した樹脂を供給
し、大きい口金内に固定した内部口金に非発泡の
樹脂を供給して、非発泡の樹脂を中に挾んだ発泡
積層体を作つたが、発泡体の体積膨張のために非
発泡の樹脂が波打つて変形歪曲し、その結果積層
体と云えるような発泡体が得られなかつた。そこ
で、この発明者はさらに研究を重ねた。(Problems to be Solved by the Invention) The inventor directly applied the above-mentioned laminate production method proposed for non-foamed resins to foams, but a good laminate could not be obtained. That is, a foamed laminate with non-foamed resin sandwiched therein was produced by supplying foamed resin into the large nozzle and supplying non-foamed resin to the internal nozzle fixed within the large nozzle. Due to the volume expansion of the foam, the non-foamed resin was undulated and deformed, and as a result, a foam that could be called a laminate could not be obtained. Therefore, the inventor conducted further research.
押出法によつて発泡成形体を製造する場合に、
口金の先に筒状の成形型を付設して、発泡性樹脂
を口金から直ちに筒状成形型の中へ押出し、筒状
成形型の中で形を整えつつ発泡させることは、既
に知られている。しかし、このような筒状成形型
の付設が、積層体に含まれている非発泡樹脂の変
形歪曲を防止するのに役立つことは知られていな
かつた。この発明者は、大きい口金の先にこのよ
うな成形型を付設すると、積層体における非発泡
樹脂層の変形歪曲を防ぎ得ることを確認した。そ
れとともに、この発明者は、大きい口金の先端で
発泡性樹脂を適度に冷却すると、積層体における
非発泡樹脂層の波打ちを防止できることを確認し
た。また、発泡性樹脂と非発泡樹脂とが接着性に
乏しいときには、その間に接着剤層を介在させる
必要があり、そのためには、大きい口金内に接着
剤を供給する口金を入れ、発泡性樹脂と非発泡樹
脂との間に接着剤を押出すのがよいことを確認し
た。この発明は、このような確認に基づいて完成
されたものである。 When manufacturing foam molded products by extrusion method,
It is already known that a cylindrical mold is attached to the tip of the nozzle, the foamable resin is immediately extruded from the nozzle into the cylindrical mold, and the foam is formed while adjusting the shape within the cylindrical mold. There is. However, it was not known that the provision of such a cylindrical mold was useful for preventing deformation and distortion of the non-foamed resin contained in the laminate. The inventor has confirmed that by attaching such a mold to the tip of a large die, deformation and distortion of the non-foamed resin layer in the laminate can be prevented. At the same time, the inventor has confirmed that by appropriately cooling the foamable resin at the tip of the large die, it is possible to prevent the non-foamed resin layer in the laminate from waving. In addition, when foamed resin and non-foamed resin have poor adhesion, it is necessary to interpose an adhesive layer between them. To do this, a cap for supplying adhesive is inserted into a large cap, and the foamed resin and non-foamed resin are bonded together. It was confirmed that extruding the adhesive between the non-foamed resin is effective. This invention was completed based on such confirmation.
（問題点を解決するための手段）
この発明は、少くとも２個の押出機を用い、そ
れぞれの押出機に口金を付設して口金に押出用扁
平孔を設け、これらの口金のうち１つの大きい口
金の樹脂通路内に他の口金を入れ、扁片孔を互い
に同一方向に向けて固定して内外二重の口金と
し、内部口金から押出される樹脂を大きい口金か
ら押出される樹脂で挾んで積層体として押出す方
法において、上記大きい口金内に発泡剤を含んだ
合成樹脂を供給し、上記内部口金内に非発泡性の
別の樹脂を供給するとともに、内部口金が大きい
口金内の合成樹脂と接する界面に両樹脂の接着剤
を供給し、大きい口金の先端において樹脂の通路
壁を冷却し、大きい口金の先端に成形型を付設し
て積層体を口金から成形型内に押出し、成形型内
で樹脂を発泡させることを特徴とする、合成樹脂
発泡積層体の製造方法に関するものである。(Means for Solving the Problems) This invention uses at least two extruders, each extruder is provided with a die, a flat extrusion hole is provided in the die, and one of these extruders is provided with a flat hole for extrusion. Insert another cap into the resin passage of the large cap and fix the flat holes facing each other in the same direction to create a dual-internal and external cap, so that the resin extruded from the inner cap is sandwiched between the resin extruded from the large cap. In this method, a synthetic resin containing a foaming agent is supplied into the large die, another non-foaming resin is fed into the inner die, and the inner die is used to extrude the synthetic resin in the large die. Adhesives of both resins are supplied to the interface in contact with the resin, the resin passage wall is cooled at the tip of the large die, a mold is attached to the tip of the large die, and the laminate is extruded from the die into the mold and molded. The present invention relates to a method for producing a synthetic resin foam laminate, which is characterized by foaming the resin in a mold.
この発明を図面に基づいて説明すると次のとお
りである。第１図は、この発明を実施していると
きの装置の縦断面図であり、第２図は、同じ装置
の水平断面図である。さらに特定して云えば、第
１図は第２図中の−線断面図にあたり、第２
図は第１図中の−線断面図にあたつている。
第３図は第１図中の一部分の拡大図であり、第４
図ないし第６図は、この発明において用いられる
他の装置の一部切欠縦断面図である。第７図及び
第８図は、この発明によつて得られる発泡積層体
の一部切欠斜視図である。 The present invention will be explained as follows based on the drawings. FIG. 1 is a longitudinal sectional view of the apparatus while practicing the invention, and FIG. 2 is a horizontal sectional view of the same apparatus. More specifically, Figure 1 corresponds to the - line cross-sectional view in Figure 2;
The figure corresponds to a sectional view taken along the - line in FIG.
Figure 3 is an enlarged view of a portion of Figure 1;
6 through 6 are partially cut away longitudinal sectional views of other devices used in the present invention. 7 and 8 are partially cutaway perspective views of a foamed laminate obtained by the present invention.
第１図及び第２図において、１は主押出機、２
はスクリユー、３は副押出機、４はスクリユー、
５は大口金、６は小口金、７は接着剤押出用口
金、８は成形型、９は第２通路、１０は引取機、
１１は流体通路である。また、ａは発泡剤含有樹
脂、ｂは非発泡性樹脂であり、ｃは接着剤、ｄは
樹脂発泡積層体である。 In Figures 1 and 2, 1 is the main extruder, 2
is a screw, 3 is a sub-extruder, 4 is a screw,
5 is a large die, 6 is a small die, 7 is an adhesive extrusion die, 8 is a mold, 9 is a second passage, 10 is a take-up machine,
11 is a fluid passage. Further, a is a foaming agent-containing resin, b is a non-foaming resin, c is an adhesive, and d is a resin foam laminate.
この発明方法では、２個の押出機、すなわち主
押出機１と副押出機３とが用いられ、主押出機１
には大きい口金５が付設され、副押出機３には小
さい口金６が付設されている。小口金６は大口金
５内に収容されている。小口金６と大口金５と
は、それぞれ押出用扁平孔６１及び５１を備え、
それら扁平孔を互いに平行に向けている。また、
大口金５の中には接着剤押出用口金７が収容さ
れ、口金７は小口金６の奥、すなわち小口金６よ
りも主押出機１に近いところに位置し、開口部を
小口金６がわに向けている。大口金５の扁平孔５
１の周りには、これを包囲する成形型８が密接さ
れている。また、大口金５の先端の扁平孔５１の
周りには流体通路１１が付設されていて、通路１
１内に冷却用媒体を循環させることによつて、樹
脂通路壁を冷却するようになつている。 In this invention method, two extruders are used, namely a main extruder 1 and a sub-extruder 3.
A large mouthpiece 5 is attached to the auxiliary extruder 3, and a small mouthpiece 6 is attached to the sub-extruder 3. The small cap 6 is housed within the large cap 5. The small die 6 and the large die 5 are provided with flat extrusion holes 61 and 51, respectively,
The flat holes are oriented parallel to each other. Also,
An adhesive extrusion die 7 is housed inside the large die 5, and the die 7 is located at the back of the small die 6, that is, closer to the main extruder 1 than the small die 6, and the small die 6 covers the opening. It's pointing at the crocodile. Flat hole 5 of large mouthpiece 5
A mold 8 that surrounds the mold 1 is tightly placed around the mold 1. Further, a fluid passage 11 is provided around the flat hole 51 at the tip of the large mouthpiece 5.
By circulating a cooling medium through the resin passage wall 1, the resin passage wall is cooled.
第１図及び第２図に示した装置において、大口
金５、小口金６、接着剤押出用口金７及び成形型
８の関係を拡大して示すと、第３図のとおりとな
る。小口金６は、押出用扁平孔６１を大口金５の
押出用扁平孔５１に向けて平行に位置し、扁平孔
６１から押出された樹脂が扁平孔５１の中間を通
過するように、大口金５内に固定されている。小
口金６の固定は、第２図に示すように小口金６に
おける扁片孔６１の両端６３及び６４を大口金５
に固定することによつて行なわれる。 In the apparatus shown in FIGS. 1 and 2, the relationship between the large die 5, the small die 6, the adhesive extrusion die 7, and the mold 8 is shown in FIG. 3 in an enlarged manner. The small mouthpiece 6 is positioned parallel to the flat extrusion hole 51 of the large mouthpiece 5 so that the resin extruded from the flat hole 61 passes through the middle of the flat hole 51. It is fixed within 5. To fix the small cap 6, as shown in FIG.
This is done by fixing it to
接着剤押出用口金７は、その開口７１を小口金
６に向けて小口金６と平行に位置し、開口７１か
ら押出された接着剤ｃが小口金６の外周に沿つて
進むように付設されている。従つて、接着剤ｃ
は、小口金の扁平孔６１から押出された非発泡性
樹脂ｂと大口金５内の発泡剤含有樹脂ａとの間に
介在するようになつている。接着剤押出用口金７
が大口金５内に固定される機構は、小口金６が大
口金５内に固定される機構と同じである。但し、
接着剤は、副押出機３の付設がわと反対がわに付
設された導口７２から導入され、導口７２には押
出機又はギヤポンプが付設されている。 The adhesive extrusion cap 7 is positioned parallel to the small cap 6 with its opening 71 facing the small cap 6, and is attached so that the adhesive c extruded from the opening 71 advances along the outer periphery of the small cap 6. ing. Therefore, adhesive c
is interposed between the non-foaming resin b extruded from the flat hole 61 of the small nozzle and the foaming agent-containing resin a within the large nozzle 5. Adhesive extrusion mouthpiece 7
The mechanism by which the small cap 6 is fixed within the large cap 5 is the same as the mechanism by which the small cap 6 is fixed within the large cap 5. however,
The adhesive is introduced through an inlet 72 attached to the opposite side of the sub-extruder 3, and an extruder or a gear pump is attached to the inlet 72.
この発明方法では、主押出機１から発泡剤を含
んだ合成樹脂ａを大口金５内に供給し、副押出機
３から発泡剤を含まない非発泡性樹脂ｂを小口金
６に供給する。それとともに、接着剤押出用口金
７内に接着剤ｃを供給する。すると、接着剤ｃ
は、大口金５内において小口金６のために２つに
分離されて発泡性樹脂ａ内へ押出され小口金６の
外周に沿つて進み、小口金６の扁平孔６１から押
出された非発泡性樹脂ｂを挾み、大口金５内で発
泡性樹脂ａと非発泡性樹脂ｂとの間に介在する。
こうして、非発泡性樹脂ｂは、中央に位置し、そ
の両側に接着剤ｃが位置し、さらにその両側に発
泡性樹脂が位置する積層状となつて大口金５内を
進行し、積層体となつて、成形型８内に押出され
る。こうして、積層体は成形型８内で発泡して発
泡積層体ｄとされる。 In the method of this invention, a synthetic resin a containing a foaming agent is supplied from a main extruder 1 into a large nozzle 5, and a non-foaming resin b containing no foaming agent is supplied from a sub-extruder 3 to a small nozzle 6. At the same time, the adhesive c is supplied into the adhesive extrusion die 7. Then, adhesive c
is separated into two parts for the small die 6 in the large die 5, is extruded into the foamable resin a, advances along the outer periphery of the small die 6, and is extruded from the flat hole 61 of the small die 6. The resin b is sandwiched between the foamable resin a and the non-foamable resin b in the large mouthpiece 5.
In this way, the non-foamable resin b is located in the center, the adhesive c is located on both sides of the non-foamable resin b, and the foamable resin is located on both sides of the non-foamable resin b, forming a laminated structure, which progresses through the large mouthpiece 5, forming a laminated body. Then, it is extruded into the mold 8. In this way, the laminate is foamed in the mold 8 to form a foamed laminate d.
上述の方法において、成形型８を用いないとき
は、積層体ｄの断面外形が一定のものとならな
い。従つて、所望の断面を持つた発泡体を得るこ
とができない。また、成形型８を用いたとして
も、成形型８を口金５から離して設置すると、矢
張り発泡体の外形を一定にすることが困難とな
る。そこで、成形型８は口金５になるべく近接さ
せることが望ましい。とくに成形型８を口金５の
先端に密接させ、口金５からの樹脂が成形型８内
へ直接押出されるようにすることが望ましい。 In the above method, when the mold 8 is not used, the cross-sectional outline of the laminate d is not constant. Therefore, it is not possible to obtain a foam having a desired cross section. Furthermore, even if the mold 8 is used, if the mold 8 is placed apart from the base 5, it will be difficult to make the outer shape of the foamed body constant. Therefore, it is desirable that the mold 8 be placed as close to the base 5 as possible. In particular, it is desirable to place the mold 8 in close contact with the tip of the base 5 so that the resin from the base 5 is directly extruded into the mold 8.
大口金５の扁平孔５１の周囲には液体通路１１
が穿設されているが、上述の方法において、流体
通路１１内に冷却用媒体を循環させないときは、
非発泡樹脂層ｂが発泡樹脂層ａ内で屈曲して大き
く位置を変動し、時には非発泡樹脂層ｂが破れた
りして、整然たるサンドイツチ状の発泡積層体が
得られない。ところが、流体通路１１内に冷却用
媒体を循環させ、大口金５の先端における樹脂通
路を適当に冷却すると、非発泡性樹脂ｂが発泡性
樹脂ａの中の一定位置に整然と位置し、従つて非
発泡の樹脂が平坦な板として発泡した樹脂ａの中
に挾まれている積層体ｄが得られる。 A liquid passage 11 is provided around the flat hole 51 of the large mouthpiece 5.
However, in the above method, when the cooling medium is not circulated within the fluid passage 11,
The non-foamed resin layer b bends within the foamed resin layer a and changes its position greatly, and sometimes the non-foamed resin layer b is torn, making it impossible to obtain a well-ordered foam laminate in the shape of a sanderch. However, when a cooling medium is circulated within the fluid passage 11 to appropriately cool the resin passage at the tip of the large mouthpiece 5, the non-foaming resin b is neatly positioned at a fixed position within the foaming resin a, and thus A laminate d is obtained in which unfoamed resin is sandwiched in the form of a flat plate in foamed resin a.
流体通路１１に循環させる冷却用媒体として
は、油水、空気等が使用できる。冷却用媒体は、
高温にある口金先端部、さらに詳しく云えば、口
金先端の樹脂通路壁を冷却するためのものである
から、相当高温のものを用いる。冷却用媒体は、
大口金５の扁平孔５１の入口における樹脂温度よ
りも少くとも５度以上、好ましくは30〜60℃低く
なるように温度設定する。 As the cooling medium to be circulated in the fluid passage 11, oil water, air, etc. can be used. The cooling medium is
Since the purpose is to cool the tip of the cap which is at a high temperature, more specifically, the wall of the resin passage at the tip of the cap, a material with a fairly high temperature is used. The cooling medium is
The temperature is set to be at least 5 degrees Celsius or more, preferably 30 to 60 degrees Celsius lower than the resin temperature at the entrance of the flat hole 51 of the large mouthpiece 5.
成形型８は、そこを通過する樹脂の断面形状を
四方から規制するもので、筒状を呈している。そ
の内面は樹脂をすべりやすくするために、弗素樹
脂で被覆されている。また、その内面を冷却する
ために壁内に流体通路１１が穿設されて、通路１
１に冷却用媒体を循環させるようになつている。 The mold 8 restricts the cross-sectional shape of the resin passing through it from all sides, and has a cylindrical shape. Its inner surface is coated with fluororesin to make the resin slippery. In addition, a fluid passage 11 is bored in the wall to cool the inner surface thereof, and the passage 1
1 to circulate a cooling medium.
成形型８における樹脂通路の断面は、終始同一
ではない。すなわち、口金５に近接する端では、
通路が、口金５の扁平板５１とほぼ同形同大であ
るが、すぐに厚み方向に急激に広がり、同時に幅
方向にも広がる。その後、通路は、厚み方向にも
幅方向にも大きく広がらないで、僅かに広がる
か、又は殆んど同じ厚み又は同じ幅となつて進行
している。成形型８は、その壁内に流体通路１１
が付設され、壁面を冷却するようになつている。 The cross section of the resin passage in the mold 8 is not the same throughout. That is, at the end close to the base 5,
Although the passage has almost the same shape and size as the flat plate 51 of the cap 5, it immediately widens rapidly in the thickness direction and simultaneously widens in the width direction. Thereafter, the passageway does not widen significantly in either the thickness direction or the width direction, but expands slightly or continues with almost the same thickness or width. The mold 8 has fluid passages 11 within its walls.
is attached to cool the wall surface.
この発明では、口金から押出された樹脂が、積
層された状態となつて成形型８内に入り、四方か
ら規制されながら発泡性樹脂部分が主として厚み
方向に発泡し、且つ成形型８の壁面によつて冷却
されて、発泡積層体となる。 In this invention, the resin extruded from the die enters the mold 8 in a layered state, and the foamable resin portion foams mainly in the thickness direction while being regulated from all sides. It is then cooled to form a foamed laminate.
第２通路９は、成形型８から離れたところに設
けられ、その間に隙間１２が成形される。第２通
路９は、扁平な面を規制するための上下の板だけ
で構成されている。すなわち、厚み方向には壁面
が存在するが、幅方向では壁面がなくて解放され
た状態となつている。厚み方向の壁面は、樹脂の
進行方向に沿つてその間の間隔が次第に狭められ
るか、または等しいものとなつている。第２通路
９の入口側における壁面間の間隔は、成形型８の
出口側における壁面間の間隔よりも大きい。ま
た、第２通路９の出口側における壁面間の間隔
は、得ようとする積層体の厚みに近くなつてい
る。また、壁面には流体通路１１が穿設され、積
層体を冷却する。こうして、第２通路９を出た積
層体ｄは引取機１０によつて引取られる。 The second passage 9 is provided at a distance from the mold 8, and a gap 12 is formed therebetween. The second passage 9 is composed of only upper and lower plates for regulating the flat surface. That is, although there is a wall surface in the thickness direction, there is no wall surface in the width direction, so that it is in an open state. The distance between the wall surfaces in the thickness direction becomes gradually narrower or equal in the direction in which the resin travels. The distance between the wall surfaces on the entrance side of the second passage 9 is larger than the distance between the wall surfaces on the exit side of the mold 8. Further, the distance between the wall surfaces on the exit side of the second passage 9 is close to the thickness of the laminate to be obtained. Further, a fluid passage 11 is bored in the wall surface to cool the stacked body. In this way, the laminate d that has exited the second passage 9 is taken up by the take-up machine 10.
この発明は、第３図に示すように、小さい口金
６が大きい口金５内に完全に内蔵された場合に限
らないし、また接着剤押出用口金７の構造及び口
金７と６との関係も色々と変化させることができ
る。例えば、第４図に示すように、小さい口金６
の先端が、大きい口金５の先端と並んで存在して
もよいし、接着剤押出用口金７が小さい口金６と
同様な構造のものであつてもよい。また第５図に
示すように、小さい口金６の先端が大きい口金５
の先端から突出していてもよいし、接着剤押出用
口金が小さい口金６と一体に作られてもよく、接
着剤押出用口金の開口７１が扁平孔６１と反対方
向に向つていてもよい。 The present invention is not limited to the case where the small cap 6 is completely built into the large cap 5 as shown in FIG. 3, and the structure of the adhesive extrusion cap 7 and the relationship between the caps 7 and 6 are various. It can be changed to For example, as shown in FIG.
The tip of the adhesive extruder 7 may be located side by side with the tip of the large die 5, or the adhesive extrusion die 7 may have a similar structure to the small die 6. Further, as shown in FIG. 5, the tip of the small cap 6 is connected to the large cap 5.
The adhesive extrusion cap may be integrally formed with the small cap 6, and the opening 71 of the adhesive extrusion cap may face in the opposite direction to the flat hole 61. .
第３図の場合は、口金５及び６から押出される
樹脂が比較的早い時期に相互に積層され、しかも
その間に接着剤が介在しているので、強固な接着
が得られる。また、この場合は、接着剤も樹脂も
何れも高い温度にあるとき積層されるので、口金
６から発泡剤を含有しない非発泡性樹脂を押出し
ても、発泡性樹脂中の発泡剤が非発泡性樹脂に移
行し、従つて発泡剤を含有しない樹脂も若干発泡
し、そのためさらに接着性の高められることもあ
る。従つて、第３図の場合は、相互接着性の余り
よくない樹脂の積層に有効である。 In the case of FIG. 3, the resins extruded from the nozzles 5 and 6 are laminated on each other at a relatively early stage, and the adhesive is interposed between them, so that strong adhesion can be obtained. In addition, in this case, since both the adhesive and the resin are laminated at high temperatures, even if non-foaming resin that does not contain a foaming agent is extruded from the nozzle 6, the foaming agent in the foaming resin will be non-foaming. Therefore, resins that do not contain foaming agents may also foam slightly, thereby further increasing the adhesion. Therefore, the case shown in FIG. 3 is effective for laminating resins whose mutual adhesion is not very good.
第４図の場合は、接着剤押出用口金７から押出
された接着剤が小口金６の後端によつて２分され
てそれぞれが小口金６の外周に沿つて進み小口金
６から押出された非発泡性樹脂を挾み、従つて発
泡性樹脂と非発泡性樹脂との間に介在して積層体
を形成する。 In the case of FIG. 4, the adhesive extruded from the adhesive extrusion nozzle 7 is divided into two parts by the rear end of the small nozzle 6, and each portion advances along the outer circumference of the small nozzle 6 and is extruded from the small nozzle 6. The non-foamable resin is interposed between the foamable resin and the non-foamable resin to form a laminate.
また、第５図の場合は、接着剤が後向きに押出
されて後端で２分され、それぞれが小口金６の外
周に沿つて進んで口金６から押出される樹脂を挾
み、その結果接着剤が発泡性樹脂と非発封性樹脂
との間に介在して積層体を形成している。また、
小口金６の扁平孔６１が大口金５の扁平孔よりも
突出しているので、小口金６から押出される樹脂
を発泡させたくないとき、または口金５から押出
される発泡性樹脂を低倍率に発泡させ厚い表皮層
を持つた積層体を得ようとするときに有効であ
る。 In addition, in the case of Fig. 5, the adhesive is extruded backward and divided into two parts at the rear end, each of which travels along the outer circumference of the small cap 6 and pinches the resin extruded from the cap 6, resulting in bonding. The agent is interposed between the foamable resin and the non-sealable resin to form a laminate. Also,
The flat hole 61 of the small nozzle 6 protrudes more than the flat hole of the large nozzle 5, so when you do not want the resin extruded from the small nozzle 6 to foam, or when you want the foamable resin extruded from the nozzle 5 to be at a low magnification. This is effective when trying to obtain a foamed laminate with a thick skin layer.
また、この発明は、第６図に示したように、口
金５内に２個の小さい口金６Ａ及び６Ｂを並列に
収容して、それぞれの口金６Ａ及び６Ｂは何れも
両側へ接着剤を押出すようにして接着剤を介在さ
せ、こうして５層の樹脂から成る積層体を作るこ
ともできる。 Further, as shown in FIG. 6, the present invention accommodates two small caps 6A and 6B in parallel in the cap 5, and each cap 6A and 6B extrudes adhesive to both sides. In this way, a laminate consisting of five resin layers can also be produced by interposing an adhesive.
大きい口金に供給する樹脂と、小さい口金に供
給する樹脂とは、互いに接着性の乏しい樹脂を用
いる。接着性の乏しい樹脂としては、スチレン系
樹脂に対するオレフイン系樹脂がその代表的なも
のであり、またそれらに対する塩化ビニル系樹脂
及び塩化ビニリデン樹脂などもこれを用いること
ができる。 The resin supplied to the large cap and the resin supplied to the small cap are resins that have poor adhesiveness to each other. Typical examples of resins with poor adhesion include olefin resins for styrene resins, and vinyl chloride resins and vinylidene chloride resins for these resins can also be used.
接着剤としては、酢酸ビニル系樹脂、ブタジエ
ン系樹脂、ブチルゴム、クロロプレンゴム等の各
種の熱可塑性接着剤を用いることができる。 As the adhesive, various thermoplastic adhesives such as vinyl acetate resin, butadiene resin, butyl rubber, chloroprene rubber, etc. can be used.
第１図ないし第５図に示した装置を用いるとき
は、例えば第７図に示すように、発泡した樹脂層
ａが接着剤層ｃを介して非発泡の樹脂層ｂを挾
み、表面に僅かな厚みのスキン層ｅを備えた発泡
積層体ｄが得られる。また、第６図に示した装置
を用いるときは、例えば第８図に示すように、３
個の発泡した樹脂層ａの間に何れも接着剤層ｃを
介して２個の非発泡の樹脂層ｂが挾まれていて、
表面に僅かな厚みのスキン層ｅのある積層体が得
られる。 When using the apparatus shown in FIGS. 1 to 5, for example, as shown in FIG. 7, a foamed resin layer a is sandwiched between a non-foamed resin layer b via an adhesive layer c, and the surface is A foamed laminate d is obtained with a slightly thick skin layer e. Moreover, when using the apparatus shown in FIG. 6, for example, as shown in FIG.
Two non-foamed resin layers b are sandwiched between each of the foamed resin layers a via an adhesive layer c,
A laminate having a slightly thick skin layer e on the surface is obtained.
（発明の効果）
この発明方法によれば、少くとも２つの押出機
を用い、それぞれの押出機に押出用扁平孔を備え
た口金を付設し、これら口金のうち１つの大きい
口金の樹脂通路内に他の口金を収容し、扁平孔を
互いに平行に向けて固定し、収容された口金から
押出される樹脂を大きい口金から押出される樹脂
で挾んで積層体として押出すので、１回の押出し
で積層体を作ることができる。しかも、大きい口
金内に発泡剤を含んだ樹脂を供給し、他の口金内
に非発泡性の別の樹脂を供給するので、非発泡性
の別の樹脂を中に挾んだ発泡積層体を一挙に作る
ことができる。また、内部にある小さい口金が大
きい口金内の合成樹脂と接する界面に接着剤を供
給したので接着剤が発泡性樹脂と非発泡性樹脂と
の間に介在することとなり、従つて両樹脂がよく
接着して強固に一体となつた積層体を得ることが
できる。また、大きい口金の先端において樹脂の
通路壁を冷却したので、発泡性樹脂は通路内を、
円滑に流動し、従つて忌わしい変形を生じない。
その上に大きい口金の先端に成形型を付設して、
積層体を口金から成形型内に押出し、成形型内で
発泡させるようにしたので、発泡性樹脂が発泡に
際し歪曲するのが防止され、従つて中に挾まれた
樹脂層の変形がなく、良好な積層体を得ることが
できる。この発明方法は、このような利点をもた
らす。(Effects of the Invention) According to the method of the invention, at least two extruders are used, each extruder is provided with a die having a flat hole for extrusion, and the resin passage of one of the large die is Another die is housed in the die, the flat holes are fixed so that they are oriented parallel to each other, and the resin extruded from the housed die is sandwiched between the resin extruded from the larger die and extruded as a laminate, so one extrusion process is performed. You can make a laminate using Moreover, since a resin containing a foaming agent is supplied into one large nozzle and another non-foaming resin is supplied into the other nozzle, a foamed laminate with another non-foaming resin sandwiched therein can be used. You can make them all at once. In addition, since the adhesive was supplied to the interface where the small internal nozzle was in contact with the synthetic resin inside the large nozzle, the adhesive was interposed between the foamable resin and the non-foamable resin. A laminate that is bonded and firmly integrated can be obtained. In addition, since the resin passage wall was cooled at the tip of the large cap, the foamable resin could cool down inside the passage.
It flows smoothly and therefore does not undergo any objectionable deformation.
On top of that, a mold is attached to the tip of the large cap,
Since the laminate is extruded from the die into the mold and foamed within the mold, the foamable resin is prevented from being distorted during foaming, and the resin layer sandwiched therein is not deformed, resulting in a good product. A laminated body can be obtained. The inventive method provides these advantages.
この発明では、前述のように、色々な合成樹脂
を用いることができる。その中でも、大きい口金
から押出す樹脂として発泡性のポリスチレンを用
い、他の口金から押出す樹脂としてオレフイン系
樹脂を用い、接着剤として酢酸ビニル系樹脂を用
いて得られた積層体は、ポリスチレンだけから成
る発泡板に比べて、透湿抵抗が著しく大きく、曲
げや衝撃に対して強いので、機能性断熱材として
特に有用である。 In this invention, as mentioned above, various synthetic resins can be used. Among them, the laminate obtained by using expandable polystyrene as the resin extruded from a large die, olefin resin as the resin extruded from the other die, and vinyl acetate resin as the adhesive is only polystyrene. It has significantly higher moisture permeation resistance than foam boards made of foam, and is resistant to bending and impact, making it particularly useful as a functional heat insulating material.
（実施例）
次に、実施例を挙げて具体例についてこの発明
の詳細を説明する。(Example) Next, details of the present invention will be described with reference to examples.
実施例 １
この実施例では、第７図に示したような発泡積
層体を得ようとした。Example 1 In this example, it was attempted to obtain a foam laminate as shown in FIG.
まず、２台の押出機を第１図及び第２図に示し
たように配置し、第１の押出機（口径50mm）によ
りポリスチレンの発泡板を作るようにした。第１
の押出機に入れる樹脂としては、ポリスチレン
100重量部（以下、単に部という）に、ヘキサブ
ロムシクロドデカン（難燃剤）２部、微粉末タル
ク（気泡調整剤）１部、着色剤少量を配合したも
のを用い、発泡剤としてジクロロジフルオロメタ
ンとメチルクロライドとを重量比で１対１の割合
で混合したものを用い、発泡剤を樹脂100部に対
して10部の割合で、押出機の途中で圧入混合し
た。 First, two extruders were arranged as shown in FIGS. 1 and 2, and the first extruder (diameter 50 mm) was used to produce a polystyrene foam board. 1st
The resin used in the extruder is polystyrene.
A mixture of 100 parts by weight (hereinafter simply referred to as parts), 2 parts of hexabromocyclododecane (flame retardant), 1 part of finely powdered talc (bubble control agent), and a small amount of colorant was used, and dichlorodifluoromethane was used as a blowing agent. and methyl chloride in a weight ratio of 1:1, and a blowing agent was mixed in the extruder at a ratio of 10 parts to 100 parts of the resin.
副押出機としては、口径32mmのものを使用し、
これから非発泡性の高密度ポリエチレンを内部に
ある小さい口金に供給した。また、接着剤として
は、酢酸ビニル含有量25重量％のエチレン酢酸ビ
ニル共重合体を用い、これを口径20mmの第３の押
出機から接着剤押出用口金内に供給して、上記共
重合体のフイルムを介在させるようにした。 As the sub-extruder, use one with a diameter of 32 mm.
From this, unfoamed high-density polyethylene was fed into a small internal nozzle. In addition, an ethylene-vinyl acetate copolymer having a vinyl acetate content of 25% by weight was used as the adhesive, and this was supplied into the adhesive extrusion die from a third extruder with a diameter of 20 mm, and the copolymer was A film was used to interpose the film.
口金としては、第３図に示したようなものを用
いた。その各部の寸法は次のとおりである。第３
図において、口金５内の発泡性樹脂の通路の厚み
は52mm、幅152mmであつて、その中に厚さ32mm、
長さ100mmの小さい口金６を付設した。口金６よ
りも奥に接着剤押出用口金７を付設した。接着剤
押出用口金７は直径12mmの円筒状マニホールドを
備え、上下にそれぞれ厚み0.2mm、幅100mmの細隙
を設けた。また、小さい口金６は直径12mmのマニ
ホールドを備え、厚み0.3mm、幅100mmの扁平孔６
１を備えていた。口金６の扁平孔６１の端から３
mmだけ離れたところに、大きい口金５の扁平孔５
１の奥がわの端が位置するようにした。扁平孔５
１は、厚み１mm、幅100mm、長さ10mmとした。 The cap shown in FIG. 3 was used. The dimensions of each part are as follows. Third
In the figure, the foamed resin passage inside the cap 5 has a thickness of 52 mm and a width of 152 mm.
A small cap 6 with a length of 100 mm is attached. An adhesive extrusion mouthpiece 7 is attached deeper than the mouthpiece 6. The adhesive extrusion die 7 was equipped with a cylindrical manifold with a diameter of 12 mm, and a slit with a thickness of 0.2 mm and a width of 100 mm was provided at the top and bottom, respectively. In addition, the small cap 6 has a manifold with a diameter of 12 mm, and a flat hole 6 with a thickness of 0.3 mm and a width of 100 mm.
It had 1. 3 from the end of the flat hole 61 of the cap 6
The flat hole 5 of the large cap 5 is located at a distance of mm.
I made it so that the back end of 1 is located. Flat hole 5
1 had a thickness of 1 mm, a width of 100 mm, and a length of 10 mm.
副押出機からは、前述の高密度ポリエチレンを
145℃で小さい口金６内に供給し、第３の押出機
からエチレン酢酸ビニル共重合体を130℃で口金
７に供給した。主押出機からは、上記発泡性樹脂
を120℃で口金５内に供給し、口金の流体通路１
１内には70℃の温水を循環させて、発泡性樹脂の
表面を冷却しつつ押出した。押出後直ちに成形型
８内に入れ、ここで形を整えつつ発泡させ、さら
に第２通路９を通過させて発泡積層体とした。 The above-mentioned high-density polyethylene is fed from the sub-extruder.
The ethylene-vinyl acetate copolymer was fed into the small die 6 at 145°C, and the ethylene-vinyl acetate copolymer was fed into the die 7 at 130°C from the third extruder. From the main extruder, the foamable resin is supplied into the mouthpiece 5 at 120°C, and the fluid passage 1 of the mouthpiece is
Warm water at 70°C was circulated in the chamber to cool the surface of the foamable resin while extruding it. Immediately after extrusion, it was put into a mold 8, where it was foamed while being shaped, and then passed through a second passage 9 to form a foamed laminate.
この積層体は、密度48Kg／m3で、非発泡樹脂層
と発泡樹脂層とが互いに強く接着されて強固な発
泡体となつていた。積層体中の非発泡のポリエチ
レン層は厚み100ミクロンであつて、多少気泡を
混在していた。この積層体の透湿度をJISZ0208
に準じて測定すると、0.15ｇ／m2hrであつた。参
考のために、発泡したポリスチレン層だけでは透
湿度は0.28ｇ／m2hrであつた。従つて、積層体と
することによつて透湿度の改善が認められた。 This laminate had a density of 48 kg/m 3 , and the non-foamed resin layer and the foamed resin layer were strongly adhered to each other to form a strong foam. The unfoamed polyethylene layer in the laminate had a thickness of 100 microns and contained some air bubbles. The moisture permeability of this laminate is JISZ0208
When measured according to the method, it was 0.15 g/m 2 hr. For reference, the foamed polystyrene layer alone had a moisture permeability of 0.28 g/m 2 hr. Therefore, it was confirmed that moisture permeability was improved by forming a laminate.
実施例 ２
この実施例では、口金として第５図に示したも
のを用い、実施例１と同様に第７図に示したよう
な発泡積層体を得ようとした。また接着剤を供給
するのにギヤポンプを用い、接着剤としてヒロダ
イン7514（ヒドダイン工業社製のエチレン酢酸ビ
ニル系ホツトメルト接着剤）を用いた。Example 2 In this example, the die shown in FIG. 5 was used to obtain a foamed laminate as shown in FIG. 7 in the same manner as in Example 1. A gear pump was used to supply the adhesive, and Hirodyne 7514 (ethylene vinyl acetate hot melt adhesive manufactured by Hidodyne Kogyo Co., Ltd.) was used as the adhesive.
ここで用いた口金の詳細は次のとおりである。
口金５の樹脂通路の厚みは22mm、幅150mmであつ
て、その中に厚さ12mm、全長60mmの小さい口金６
を付設した。発泡性樹脂が分断された流路５２及
び５３は、何れも厚み0.8mm、幅100mm、長さ10mm
とした。接着剤マニホールドは、直径８mmであ
り、奥へ向つて厚み0.5mm、幅100mm、長さ５mmの
扁平孔に連なつていた。また、非発泡性樹脂のマ
ニホールドは、同じく直径８mmであつて、押出方
向に向つて厚み0.3mm、幅100mm、長さ５mmの扁平
孔６１に連なつていた。 Details of the cap used here are as follows.
The resin passage of the cap 5 has a thickness of 22 mm and a width of 150 mm, and there is a small cap 6 with a thickness of 12 mm and a total length of 60 mm.
has been added. The flow channels 52 and 53 in which the foamable resin is divided have a thickness of 0.8 mm, a width of 100 mm, and a length of 10 mm.
And so. The adhesive manifold had a diameter of 8 mm, and was connected to a flat hole with a thickness of 0.5 mm, a width of 100 mm, and a length of 5 mm toward the back. The non-foamable resin manifold also had a diameter of 8 mm, and was connected in the extrusion direction to a flat hole 61 having a thickness of 0.3 mm, a width of 100 mm, and a length of 5 mm.
押出温度は実施例１と同じにし、接着剤をギヤ
ポンプから110℃で供給した。大きい口金５の流
体通路１１には70℃の温水を通し、発泡直前の樹
脂の表面を冷却した。口金から排出された樹脂を
直ちに成形型８に入れ、その後第２通路に入れ
た。成形型８は、出口側の厚みが18mm、幅140mm、
長さ100mmであり、第２通路は厚み25mm、長さ300
mmとした。こうして、中に非発泡の樹脂層を含ん
だ発泡積層体で、厚み25mm、幅200mm、密度50
Kg／m3の発泡積層体を得た。 The extrusion temperature was the same as in Example 1, and the adhesive was supplied from a gear pump at 110°C. Hot water at 70° C. was passed through the fluid passage 11 of the large mouthpiece 5 to cool the surface of the resin just before foaming. The resin discharged from the die was immediately put into the mold 8, and then into the second passage. The mold 8 has a thickness of 18 mm on the exit side and a width of 140 mm.
The length is 100mm, and the second passage is 25mm thick and 300mm long.
mm. In this way, it is a foamed laminate containing a non-foamed resin layer, with a thickness of 25mm, width of 200mm, and density of 50mm.
A foam laminate of Kg/m 3 was obtained.
この発泡積層体は、中間に約200ミクロンの非
発泡のポリエチレンフイルムを含み、そのフイル
ムは全く発泡しておらず、実施例１のものよりも
透湿度の小さいものであつた。実際に、
JISZ0208に準じて透湿度を測定したところ、透
湿度は0.10ｇ／m2hrであつた。また、この積層体
は接着が良好で表皮の硬いものであつた。 This foamed laminate contained an unfoamed polyethylene film of about 200 microns in the middle, which was not foamed at all and had a lower moisture permeability than that of Example 1. actually,
When the moisture permeability was measured according to JISZ0208, the moisture permeability was 0.10 g/m 2 hr. Moreover, this laminate had good adhesion and a hard skin.
第１図及び第２図は、この発明方法の一実施態
様を示した断面図である。第３図は、第１図中の
一部切欠拡大断面図である。第４図ないし第６図
は、この発明方法の他の実施態様を示した第３図
と同様な拡大断面図である。第７図及び第８図
は、この発明方法によつて得られる発泡積層体の
一部切欠斜視図である。
1 and 2 are cross-sectional views showing one embodiment of the method of this invention. FIG. 3 is a partially cutaway enlarged sectional view of FIG. 1. 4 to 6 are enlarged cross-sectional views similar to FIG. 3 showing other embodiments of the method of the present invention. 7 and 8 are partially cutaway perspective views of a foamed laminate obtained by the method of the present invention.
Claims (1)
出機に口金を付設して口金に押出用扁平孔を設
け、これらの口金のうち１つの大きい口金の樹脂
通路内に他の口金を入れ、扁平孔を互いに平行に
同一方向に向け固定して内外二重の口金とし、内
部口金から押出される樹脂を大きい口金から押出
される樹脂で挾んで積層体として押出す方法にお
いて、上記大きい口金内に発泡剤を含んだ合成樹
脂を供給し、上記内部口金に非発泡性の別の樹脂
を供給するとともに、内部口金が大きい口金内の
合成樹脂と接する界面に両樹脂の接着剤を供給
し、大きい口金の先端において樹脂の通路壁を冷
却し、大きい口金の先端に成形型を付設して積層
体を口金から成形型内に押出し、成形型内で樹脂
を発泡させることを特徴とする、合成樹脂発泡積
層体の製造方法。 ２ 大きい口金に供給される発泡性合成樹脂がポ
リスチレンであり、その余の口金に供給される合
成樹脂がポリオレフイン系樹脂である、特許請求
の範囲第１項に記載する合成樹脂発泡積層体の製
造方法。[Claims] 1. Using at least two extruders, each extruder is equipped with a mouthpiece, a flat hole for extrusion is provided in the mouthpiece, and one of the large mouthpieces has a resin passage. A method of inserting another cap and fixing the flat holes parallel to each other in the same direction to create a double inner and outer cap, and then sandwiching the resin extruded from the inner cap with the resin extruded from the larger cap and extruding it as a laminate. In this step, a synthetic resin containing a foaming agent is supplied into the large nozzle, another non-foaming resin is supplied to the internal nozzle, and both resins are supplied at the interface where the internal nozzle contacts the synthetic resin within the large nozzle. Supplying adhesive, cooling the resin passage wall at the tip of the large cap, attaching a mold to the tip of the large cap, extruding the laminate from the cap into the mold, and foaming the resin within the mold. A method for producing a synthetic resin foam laminate, characterized by: 2. Production of a synthetic resin foam laminate according to claim 1, wherein the foamable synthetic resin supplied to the large mouthpiece is polystyrene, and the synthetic resin supplied to the remaining mouthpieces is a polyolefin resin. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59141249A JPS6119330A (en) | 1984-07-06 | 1984-07-06 | Manufacture of synthetic-resin foamed laminate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59141249A JPS6119330A (en) | 1984-07-06 | 1984-07-06 | Manufacture of synthetic-resin foamed laminate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6119330A JPS6119330A (en) | 1986-01-28 |
| JPH0117852B2 true JPH0117852B2 (en) | 1989-04-03 |
Family
ID=15287544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59141249A Granted JPS6119330A (en) | 1984-07-06 | 1984-07-06 | Manufacture of synthetic-resin foamed laminate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6119330A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159171C (en) * | 1998-02-26 | 2004-07-28 | 米什兰集团总公司 | Electrically conductive typre and apparatus for extruding sections made conductive |
| US6951233B1 (en) | 1998-02-26 | 2005-10-04 | Compagnie Generale Des Etablissements Michelin-Michelin & Cie | Electrically conductive tire and apparatus and process for extruding elements which have been made conductive |
| JP2011025521A (en) * | 2009-07-24 | 2011-02-10 | Kaneka Corp | Extrusion foamed molding excellent in heat insulating performance |
-
1984
- 1984-07-06 JP JP59141249A patent/JPS6119330A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6119330A (en) | 1986-01-28 |
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