JPH0825543A - Laminated foam - Google Patents

Laminated foam

Info

Publication number
JPH0825543A
JPH0825543A JP6163614A JP16361494A JPH0825543A JP H0825543 A JPH0825543 A JP H0825543A JP 6163614 A JP6163614 A JP 6163614A JP 16361494 A JP16361494 A JP 16361494A JP H0825543 A JPH0825543 A JP H0825543A
Authority
JP
Japan
Prior art keywords
foam
laminated
thickness
heat
inner layer
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.)
Pending
Application number
JP6163614A
Other languages
Japanese (ja)
Inventor
Masayoshi Otsuki
政義 大槻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP6163614A priority Critical patent/JPH0825543A/en
Publication of JPH0825543A publication Critical patent/JPH0825543A/en
Pending legal-status Critical Current

Links

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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • B29C65/1422—Far-infrared radiation [FIR]
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1432—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface direct heating of the surfaces to be joined
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1454—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1458—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface scanning at least one of the parts to be joined once, i.e. contour welding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1464—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators
    • B29C65/1467—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous welding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • B29C66/73521—Thickness, e.g. very thin of different thickness, i.e. the thickness of one of the parts to be joined being different from the thickness of the other part
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Laminated Bodies (AREA)

Abstract

PURPOSE:To provide a laminated foam wherein it is manufactured by laminating it by heat welding, its section does not become hollow even if it is cut as it is not cooled and it is superior in heat insulation properties or an external appearance. CONSTITUTION:A laminated foam 1 prepared by laminating a homogeneous polyethylene foams 3, 3 (7.5mm thick, expansion ratio of 30) becoming an outer layer on both surfaces of a polyethylene foam(10mm thick, 30Xmagnification of expansion) 2 becoming an inner layer by heat welding, has a thickness of 25mm and its cutting line 11 is in a straight line in a thickness direction.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、３層以上のポリオレフ
ィン系樹脂発泡体が熱融着により積層された積層発泡体
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated foam in which three or more layers of polyolefin resin foam are laminated by heat fusion.

【０００２】[0002]

【従来の技術】ポリオレフィン系樹脂特にポリエチレン
発泡体は断熱性、クッション性にすぐれ、加工性がよい
ので風呂用のすのこやマットとして広く使用されてい
る。このような風呂用すのこやマットは厚みの大きいも
のが用いられる。ところで、ポリエチレン発泡体は上記
のような厚みの大きいものとして押出し発泡成形するこ
とは困難であるため、例えば実公平４−３６７０９号公
報記載の風呂用マットもしくは、すのこのように、比較
的厚みの薄いシート状に成形したものを何枚か重ねて熱
融着することにより厚物とされる。2. Description of the Related Art Polyolefin resins, especially polyethylene foams, are widely used as slats and mats for baths because they have excellent heat insulating properties, cushioning properties and good workability. A thick thing is used for such a drainboard or mat for bath. By the way, since it is difficult to extrude and foam a polyethylene foam having a large thickness as described above, for example, a bath mat described in Japanese Utility Model Publication No. 4-36709 or a soot having a relatively thick thickness. It is made into a thick product by stacking several sheets formed into thin sheets and heat-sealing them.

【０００３】上記熱融着による積層方法は、例えば厚み
５ｍｍのポリエチレン発泡体の場合、４層までは１工程
で熱融着積層は可能である。４層よりも厚い厚みが必要
な場合には、予め２〜３枚ずつ熱融着で積層しておいた
ものを更に何枚か熱融着により積層することにより得る
ことができる。このように熱融着により積層した厚物の
発泡体は、熱融着直後に所望の大きさ、形状に切断した
り打ち抜いたりして製品が得られる。In the lamination method by heat fusion, for example, in the case of a polyethylene foam having a thickness of 5 mm, up to four layers can be laminated by heat fusion in one step. When a thickness greater than four layers is required, it can be obtained by preliminarily laminating 2-3 sheets by heat fusion and further laminating several sheets by heat fusion. The thick foamed material laminated by heat fusion in this way can be cut or punched into a desired size and shape immediately after heat fusion to obtain a product.

【０００４】[0004]

【発明が解決しようとする課題】上記のようにして３層
以上の積層体とした直後に所望の大きさや形状に切断も
しくは打ち抜かれる。それが冷却された後は、図４に示
すように断面が凹面となるような窪み１０が生ずる。Immediately after the laminate having three or more layers is formed as described above, it is cut or punched into a desired size and shape. After it has cooled, depressions 10 are formed whose cross section is concave, as shown in FIG.

【０００５】この理由として以下のように考えられる。
３層以上のポリオレフィン系樹脂発泡体を熱融着で積層
する場合、内層となる発泡体面と外層となる発泡体面と
を遠赤外線ヒーター等により同時に、且つ均等に加熱
し、表面が加熱溶融した発泡体同士を圧着すると接着積
層される。しかし、内層の発泡体は熱融着接着されたと
き両面から熱融着のための熱を受け、外層の発泡体より
も受熱量が大である。積層後、外層は容易に放熱する
が、内層は容易に放熱されず蓄熱する。The reason for this is considered as follows.
When three or more layers of polyolefin-based resin foam are laminated by heat fusion, the surface of the foam that serves as the inner layer and the surface of the foam that serves as the outer layer are simultaneously and evenly heated by a far infrared heater, etc. When the bodies are pressure-bonded, they are bonded and laminated. However, the foam of the inner layer receives heat for heat fusion from both sides when heat-sealed and has a larger amount of heat received than the foam of the outer layer. After stacking, the outer layer easily radiates heat, but the inner layer does not radiate easily and stores heat.

【０００６】即ち、熱融着積層時において内層は外層よ
りも高温となり、断熱性を有するため内層の温度は容易
に下がらない。この温度状態のままで積層体を積層面に
垂直に裁断し、この積層体が常温まで冷却するとき、熱
融着積層時の温度と常温との温度差は内層の方が大であ
る。このため、平面方向における発泡体の収縮量は外層
よりも内層の方が大となり、断面が凹状に窪んだ形状と
なる。従って、積層体の厚みが大となるほど、又、切断
時の内層の温度が高いほどこの傾向が顕著となる。That is, the inner layer becomes hotter than the outer layer at the time of heat fusion lamination, and the temperature of the inner layer does not easily drop because it has heat insulating properties. When the laminated body is cut perpendicularly to the laminating surface in this temperature state and the laminated body is cooled to room temperature, the temperature difference between the temperature at the time of heat fusion lamination and the room temperature is larger in the inner layer. Therefore, the shrinkage amount of the foam in the plane direction is larger in the inner layer than in the outer layer, and the cross section has a concave shape. Therefore, this tendency becomes more remarkable as the thickness of the laminate increases and as the temperature of the inner layer during cutting increases.

【０００７】本発明は上記従来の問題点を解消し、厚み
の厚い積層発泡体を熱融着により積層して製造し、これ
を切断しても断面が凹状に窪むことがなく、断熱性や外
観にすぐれた積層発泡体を提供することを目的とする。The present invention solves the above-mentioned problems of the prior art and is manufactured by laminating thick laminated foams by thermal fusion bonding, and even if they are cut, the cross-section does not dent into a concave shape, and the heat insulating property is improved. The object is to provide a laminated foam excellent in appearance and appearance.

【０００８】[0008]

【課題を解決するための手段】本発明積層発泡体は、内
層及びその両面で外層となるポリオレフィン系樹脂発泡
体が互いに熱融着により積層されてなる３層以上の積層
発泡体において、内層を構成する発泡体の樹脂量がいず
れの外層を構成する発泡体の樹脂量よりも大であること
を特徴とするものである。Means for Solving the Problems The laminated foam of the present invention is a laminated foam having three or more layers in which an inner layer and polyolefin resin foams serving as outer layers on both sides thereof are laminated by heat fusion to each other. It is characterized in that the amount of resin of the foamed material is larger than the amount of resin of the foamed material forming any of the outer layers.

【０００９】本発明で発泡体として使用するポリオレフ
ィン系樹脂は、ポリエチレン、ポリプロピレン、エチレ
ン−酢酸ビニル共重合体等、又、これら２種以上の混合
物からなるもので、必要に応じて顔料等の充填剤が混合
されてもよい。発泡倍率が５倍よりも低いとクッション
性、柔軟性が乏しく、５０倍を超えると柔らかすぎて強
度が低くなり実用性を損じるので、発泡倍率が５〜５０
倍のものが好ましい。発泡体は単一の層からなるもので
あってもよく、予め何枚か積層されたものであってもよ
い。The polyolefin resin used as a foam in the present invention comprises polyethylene, polypropylene, ethylene-vinyl acetate copolymer and the like, or a mixture of two or more kinds thereof, and if necessary, a pigment or the like is filled. The agents may be mixed. If the expansion ratio is less than 5 times, the cushioning property and flexibility will be poor, and if it exceeds 50 times, it will be too soft and the strength will be reduced, impairing the practicality.
Double is preferable. The foam may be composed of a single layer, or may be laminated in advance with several sheets.

【００１０】本発明における内層とその両面で外層とな
る発泡体は発泡倍率、厚みを上記の範囲から選択して組
み合わせる。即ち、内層となる発泡体として、各外層と
なる発泡体よりも樹脂量つまり単位面積あたりの重量が
大きくなるように発泡倍率もしくは厚み、又はその両方
を選択すればよい。本発明で使用する発泡体の樹脂は架
橋されているものであっても、又、架橋されていないも
のであってもよい。In the present invention, the inner layer and the foamed body having outer layers on both sides thereof are selected from the above ranges of foaming ratio and thickness and combined. That is, the expansion ratio and / or the thickness may be selected so that the amount of resin, that is, the weight per unit area, of the foam that will be the inner layer will be greater than that of the foam that will be the outer layer. The resin of the foam used in the present invention may be crosslinked or non-crosslinked.

【００１１】上記のようにして積層された積層発泡体の
内層の発泡体は両面から熱を受けるが、この両面に積層
された外層の発泡体よりも樹脂量が多いので加熱収縮率
が低く、冷却後においても切断した断面が凹状に窪む変
形が生じない。The foam of the inner layer of the laminated foam laminated as described above receives heat from both sides, but since the amount of resin is larger than that of the foam of the outer layer laminated on both sides, the heat shrinkage rate is low, Even after cooling, the cut cross section is not deformed to be concave.

【００１２】[0012]

【作用】本発明積層発泡体は、内層となる発泡体に収縮
が生じないので、窪みのない断面を有するものであり、
断熱性や外観にすぐれたものである。The laminated foam of the present invention has a cross section having no depression because the foam to be the inner layer does not shrink.
It has excellent heat insulation and appearance.

【００１３】[0013]

【実施例】次に本発明の実施例を図面を参照して説明す
る。 （実施例１）図１は本発明積層発泡体の実施例を示す断
面図であり、積層発泡体１は内層となるポリエチレン発
泡体（厚み１０ｍｍ、発泡倍率３０倍）２の両面に外層
となる同質のポリエチレン発泡体３、３（厚み７．５ｍ
ｍ、発泡倍率３０倍）が熱融着により積層された厚み２
５ｍｍのものであり、その切断線１１は厚み方向に直線
状である。Next, an embodiment of the present invention will be described with reference to the drawings. (Example 1) FIG. 1 is a cross-sectional view showing an example of the laminated foam of the present invention. The laminated foam 1 has polyethylene foam (thickness 10 mm, foaming ratio 30 times) 2 as an inner layer, and outer layers on both sides. Polyethylene foams 3 and 3 of the same quality (thickness 7.5 m
m, foaming ratio 30 times), and a thickness of 2 by heat fusion.
The cut line 11 has a linear shape in the thickness direction.

【００１４】ポリエチレン発泡体３、３は図２に示すよ
うに、予め、厚み４ｍｍのポリエチレン発泡体３１と
３．５ｍｍの同質のポリエチレン発泡体３２とが向き合
う面同士をヒーター４により加熱溶融して圧着ロール
５、５により圧着して積層されたものである。又、ポリ
エチレン発泡体２も同様にして厚み５ｍｍの２枚のポリ
エチレン発泡体２１、２１が予め熱融着により積層され
たものである。As shown in FIG. 2, the polyethylene foams 3 and 3 are previously heated and melted by the heater 4 at the surfaces where the polyethylene foam 31 having a thickness of 4 mm and the polyethylene foam 32 having the same quality of 3.5 mm face each other. The pressure-sensitive adhesive rolls 5 and 5 are pressure-bonded and laminated. Similarly, the polyethylene foam 2 is formed by laminating two pieces of polyethylene foam 21 having a thickness of 5 mm in advance by heat fusion.

【００１５】上記積層発泡体１の製造方法を図３により
説明する。ロール状に巻かれた発泡体３、３の間に、こ
れもロール状に巻かれた発泡体２を配置し、各々の発泡
体３、２、３を熱融着装置へ供給し、中央の発泡体２の
両面及び発泡体３、３の発泡体２側の面を遠赤外線ヒー
ター６、６により加熱溶融し、これらをラミネートロー
ル７、７により圧着することにより積層した。ラミネー
ト直後の積層発泡体１の表面温度は７０〜１００℃であ
った。これを引取りロール８、８通過後に幅方向の両端
部をスリッター９１で切り落とし、次にカッター９によ
り所定の長さに裁断した。上記発泡体２の樹脂量は０．
３３ｇ／ｍ2 であり、発泡体３の樹脂量は０．２５ｇ／
ｍ2 であった。A method of manufacturing the laminated foam 1 will be described with reference to FIG. The foam 2 which is also wound in a roll is arranged between the foams 3 and 3 which are wound in a roll, and each of the foams 3, 2 and 3 is supplied to the heat fusion device, and Both surfaces of the foam body 2 and the surfaces of the foam bodies 3 and 3 on the foam body 2 side were heated and melted by the far-infrared heaters 6 and 6 and laminated by pressing them with laminating rolls 7 and 7. The surface temperature of the laminated foam 1 immediately after lamination was 70 to 100 ° C. After passing through the take-up rolls 8 and 8, both ends in the width direction were cut off by a slitter 91, and then cut by a cutter 9 into a predetermined length. The resin amount of the foam 2 is 0.
33 g / m 2 , and the resin amount of the foam 3 is 0.25 g / m 2.
m 2 .

【００１６】積層発泡体１が冷却した後、裁断した切断
面を観察したところ、発泡体２の窪みは０．３ｍｍ以下
であり目視によっては認められないものであった。After the laminated foam 1 was cooled, the cut surface was observed, and the hollow of the foam 2 was 0.3 mm or less, which was not visually recognized.

【００１７】（実施例２）発泡体２の厚みを１０ｍｍと
し、発泡体３の厚みを９ｍｍとした以外は実施例１と同
様にしてこれらを熱融着して積層発泡体を得た。発泡体
２の樹脂量は０．３３ｇ／ｍ2 であり、発泡体３の樹脂
量は０．３０ｇ／ｍ2 であった。積層発泡体１が冷却し
た後、裁断した切断面を観察したところ、発泡体２の窪
みは０．３ｍｍ以下であり目視によっては殆ど認められ
なかった。Example 2 These were heat-sealed in the same manner as in Example 1 except that the foam 2 had a thickness of 10 mm and the foam 3 had a thickness of 9 mm to obtain a laminated foam. The resin amount of the foam 2 was 0.33 g / m 2 , and the resin amount of the foam 3 was 0.30 g / m 2 . After the laminated foam 1 was cooled, the cut surface cut was observed, and the hollow of the foam 2 was 0.3 mm or less, which was hardly recognized visually.

【００１８】（実施例３）発泡体２の発泡倍率を２５倍
とし、発泡体３の厚みを１０ｍｍとした以外は実施例１
と同様にしてこれらを熱融着して積層発泡体を得た。発
泡体２の樹脂量は０．４０ｇ／ｍ2 であり、発泡体３の
樹脂は０．３３であった。積層発泡体１が冷却した後、
裁断した切断面を観察したところ、発泡体２の窪みは
０．３ｍｍ以下であり目視によっては殆ど認められなか
った。(Example 3) Example 1 except that the foaming ratio of the foam 2 was 25 times and the thickness of the foam 3 was 10 mm.
These were heat-sealed in the same manner as above to obtain a laminated foam. The resin amount of the foam 2 was 0.40 g / m 2 , and the resin amount of the foam 3 was 0.33. After the laminated foam 1 has cooled,
As a result of observing the cut surface, the hollow of the foam 2 was 0.3 mm or less, and it was hardly recognized visually.

【００１９】（実施例４）発泡体２の発泡倍率を２８倍
とした以外は実施例３と同様にしてこれらを熱融着して
積層発泡体を得た。発泡体２の樹脂量は０．３５ｇ／ｍ
2 であり、発泡体３の樹脂量は０．３３ｇ／ｍ2 であっ
た。積層発泡体１が冷却した後、裁断した切断面を観察
したところ、発泡体２の窪みは０．３ｍｍ以下であり目
視によっては殆ど認められなかった。Example 4 A laminated foam was obtained by heat-sealing these in the same manner as in Example 3 except that the expansion ratio of the foam 2 was 28 times. The resin amount of the foam 2 is 0.35 g / m
2 , and the resin amount of the foam 3 was 0.33 g / m 2 . After the laminated foam 1 was cooled, the cut surface cut was observed, and the hollow of the foam 2 was 0.3 mm or less, which was hardly recognized visually.

【００２０】（比較例）発泡体２の厚みを５ｍｍとし、
発泡体３は厚み５ｍｍの２枚の発泡体原反を予め熱融着
で積層した厚み１０ｍｍのものを用いた以外は実施例１
と同様にして積層発泡体とした。発泡体２の樹脂量は
０．１６５ｇ／ｍ2 であり、発泡体３の樹脂量は０．３
３ｇ／ｍ2 であった。このものは冷却した後に裁断した
ところ、切断面の発泡体２の部分で約１ｍｍの窪みを生
じており、目視ではっきりと認められ、外観が悪くかっ
た。(Comparative Example) The foam 2 has a thickness of 5 mm,
As the foam 3, Example 1 was used, except that two foam raw materials each having a thickness of 5 mm were laminated in advance by heat fusion to have a thickness of 10 mm.
A laminated foam was prepared in the same manner as in. The resin amount of foam 2 is 0.165 g / m 2 , and the resin amount of foam 3 is 0.3
It was 3 g / m 2 . When this product was cut after being cooled, a dent of about 1 mm was formed in the cut surface of the foam body 2, which was clearly visible and the appearance was poor.

【００２１】[0021]

【発明の効果】本発明積層発泡体は以上の構成であり、
熱融着による積層後、直ちに裁断しても内層となる発泡
体に収縮が生じないので、断面に凹状の窪みがなく、敷
き並べたときに断熱性が損なわれず、又、外観にすぐれ
た厚みの大きいものである。The laminated foam of the present invention has the above constitution,
Since the foam that will be the inner layer does not shrink even if cut immediately after lamination by heat fusion, there is no concave depression in the cross section, heat insulation is not impaired when laid side by side, and a thickness with an excellent appearance Is a big one.

【００２２】[0022]

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明積層発泡体の実施例を示す断面図。FIG. 1 is a cross-sectional view showing an embodiment of a laminated foam of the present invention.

【図２】実施例１で用いる発泡体の製造方法を示す説明
図。FIG. 2 is an explanatory view showing a method for producing a foam used in Example 1.

【図３】本発明積層発泡体の製造方法の実施例を示す説
明図。FIG. 3 is an explanatory diagram showing an example of a method for producing a laminated foam of the present invention.

【図４】従来の積層体を示す断面図。FIG. 4 is a cross-sectional view showing a conventional laminated body.

【符号の説明】[Explanation of symbols]

１ ：積層発泡体 ２，３，２１，３１，３２：ポリエチレン発泡体 ５ ：圧着ロール ６ ：赤外線ヒーター ７ ：ラミネートロール ９ ：カッター １１：切断線 1: Laminated foam 2, 3, 21, 31, 32: Polyethylene foam 5: Crimping roll 6: Infrared heater 7: Laminating roll 9: Cutter 11: Cutting line

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 内層及びその両面で外層となるポリオレ
フィン系樹脂発泡体が互いに熱融着により積層されてな
る３層以上の積層発泡体において、内層を構成する発泡
体の樹脂量がいずれの外層を構成する発泡体の樹脂量よ
りも大であることを特徴とする積層発泡体。1. A laminated foam having three or more layers in which a polyolefin resin foam, which is an outer layer on both sides of the inner layer, is laminated by heat fusion with each other, and in which the resin amount of the foam constituting the inner layer is any outer layer. The laminated foam is characterized in that it is larger than the resin amount of the foam constituting the.
JP6163614A 1994-07-15 1994-07-15 Laminated foam Pending JPH0825543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6163614A JPH0825543A (en) 1994-07-15 1994-07-15 Laminated foam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6163614A JPH0825543A (en) 1994-07-15 1994-07-15 Laminated foam

Publications (1)

Publication Number Publication Date
JPH0825543A true JPH0825543A (en) 1996-01-30

Family

ID=15777279

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6163614A Pending JPH0825543A (en) 1994-07-15 1994-07-15 Laminated foam

Country Status (1)

Country Link
JP (1) JPH0825543A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001076743A (en) * 1999-07-02 2001-03-23 Toyota Motor Corp Thin film laminating device
KR20210129612A (en) 2020-04-20 2021-10-28 시부야 패키징 시스템 가부시키가이샤 Apparatus for manufacturing package

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001076743A (en) * 1999-07-02 2001-03-23 Toyota Motor Corp Thin film laminating device
KR20210129612A (en) 2020-04-20 2021-10-28 시부야 패키징 시스템 가부시키가이샤 Apparatus for manufacturing package

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