JPH0971681A - Compressed foam and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a compressed foam by retaining a molding comprising a closed cell resin molding having shape recovery properties in a compressed state at least in one direction, excellent in handleability, capable of being filled simply and densely even in a narrow space. SOLUTION: This compressed molding is obtained by retaining a molding comprising a closed cell resin molding having shape recovery properties in a compressed state at least in one direction. The closed cell ratio of the closed cell resin foam is preferably 60-100%. For example, a sheet, a tube, etc., may be cited as the shape of the molding. The resin constituting the molding has preferably <=10% compression set. To be concrete, an olefin resin, a styrene- based resin, etc., may be cited as the resin. The objective foam 5, for example, is obtained by laying a long molding 1 composed of a closed cell resin molding between a compressing roll 2 and a direction changing roll 31 at the end of an endless belt 3 made of a metal, compressing the molding and continuously rolling the compressed molding on a wrapping roll 4 while pressing it to the wrapping roll 4 side by the endless belt 3.

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、圧縮発泡体およびその
製造方法に関する。FIELD OF THE INVENTION The present invention relates to a compressed foam and a method for producing the same.

【０００２】[0002]

【従来の技術】従来より断熱性や緩衝性等の機能に優れ
ており、住宅，建築，土木，車輛，家電，文具，雑貨，
衣料などいろいろな分野で断熱性や緩衝性等の機能を高
めるための充填材として、たとえば、特開昭５０−３７
８６３号公報や６２−１８９２３６号公報に開示されて
いる合成ゴム発泡体のような連続気泡タイプの合成樹脂
発泡体や、特開平６−３３６２４５号公報に開示されて
いるポリスチレン発泡体、特公平６−４３５１２号公報
に開示されているポリプロピレン系樹脂発泡体、特公平
６−４３５１３号公報１開示されているポリエチレン系
樹脂発泡体などのようないろいろな独立気泡タイプの合
成樹脂発泡体が提案されている。2. Description of the Related Art Households, construction, civil engineering, vehicles, home appliances, stationery, sundries, etc.
As a filler for enhancing functions such as heat insulating properties and cushioning properties in various fields such as clothing, for example, JP-A-50-37
Open-cell type synthetic resin foams such as synthetic rubber foams disclosed in Japanese Patent No. 863 and 62-189236, polystyrene foams disclosed in Japanese Patent Laid-Open No. 6-336245, and Japanese Patent Publication No. Various closed cell type synthetic resin foams such as a polypropylene resin foam disclosed in Japanese Patent Publication No. 43512 and a polyethylene resin foam disclosed in Japanese Patent Publication No. 6-43513 have been proposed. There is.

【０００３】[0003]

【発明が解決しようとする課題】しかし、従来の独立気
泡タイプの合成樹脂発泡体は、場合によっては、以下の
ような問題が発生する恐れがあった。 狭い空間に押し込むように充填しようとした場合、
無理に押し込むと発泡体が切れてばらばらになり充填材
としての役目を果たさなくなり、作業性が非常に悪い。However, the conventional closed-cell type synthetic resin foam may have the following problems in some cases. If you try to fill it into a tight space,
If it is forcibly pushed, the foam will be broken and fall apart, and will no longer serve as a filler, resulting in very poor workability.

【０００４】 チップ状に成形して箱等の容器に充填
し、箱内の内容物を保護しようとした場合、初期に完全
に隙間なく充填させるのが難しいため、箱の輸送中に振
動によって発泡体の再充填化が起こり、隙間が生じて箱
内の内容物を充分に保護しきれず内容物に傷が付いたり
内容物が壊れたりする。 パネルの中空部に液体で注入し、その後発泡させる
注入発泡法（日刊工業新聞社 昭和４８年刊 プラスチ
ックフォームハンドブックＰ．２００参照）を用いれ
ば、狭い空間でも問題なく発泡体を充填できるのである
が、液体であるため取扱性に問題があるとともに、注入
口と連続する隙間以外に発泡体を形成させることが難し
いと言う問題もある。[0004] When it is molded into chips and filled in a container such as a box to protect the contents in the box, it is difficult to completely fill the box without any gaps at the beginning. Refilling of the body occurs, creating gaps that cannot adequately protect the contents of the box, causing damage or breakage of the contents. By using the injection foaming method (Nikkan Kogyo Shimbun, 1974, Plastic Foam Handbook P.200) in which liquid is injected into the hollow portion of the panel and then foamed, the foam can be filled without problems even in a narrow space. Since it is a liquid, there is a problem in handleability, and there is also a problem that it is difficult to form a foam other than a gap continuous with the injection port.

【０００５】一方、特開昭５０−３７８６３号公報や６
２−１８９２３６号公報に開示されている連続気泡タイ
プの発泡体の場合、連続気泡内にアスファルトなどが充
填されているため、圧縮して隙間などに充填しようとす
ると、アスファルトなどが表面に滲みでてきて施工性が
悪い。On the other hand, JP-A-50-37863 and 6
In the case of the open-cell type foam disclosed in Japanese Unexamined Patent Publication No. 2-189236, since asphalt or the like is filled in the open-cells, the asphalt or the like bleeds on the surface when it is compressed to fill a gap or the like. The workability is poor.

【０００６】本発明は、このような事情に鑑みて、取扱
性に優れ、狭い空間でも簡単に充填することができる圧
縮発泡体およびその製造方法を提供することを目的とし
ている。In view of such circumstances, an object of the present invention is to provide a compressed foam which is excellent in handleability and can be easily filled even in a narrow space, and a method for producing the same.

【０００７】[0007]

【課題を解決するための手段】このような目的を達成す
るために、請求項１に記載の発明にかかる圧縮発泡体
は、形状回復性を有する独立気泡樹脂発泡体からなる成
形体が、少なくとも一方向から圧縮された状態に保持さ
れている構成とした。In order to achieve such an object, in the compressed foam according to the invention described in claim 1, a molded body made of a closed-cell resin foam having a shape recovering property is at least formed. It is configured to be held in a compressed state from one direction.

【０００８】上記請求項１の構成において、形状回復性
を有する独立気泡樹脂発泡体とは、圧縮歪みを与えた場
合、発泡体を構成する独立気泡の内圧が上昇し、直後に
外力を取り除けば発泡体は瞬時に元の形状に回復する
が、所定時間以上その歪みを保持させれば、樹脂のガス
透過性により気泡内のガスが気泡膜から徐々にぬけてゆ
き内圧と外圧とが釣り合い、外力を取り除いても瞬間的
な形状回復は起こらず、圧縮を解除すると樹脂の弾性回
復力により気泡の内外圧力と釣り合いながら徐々にもと
の厚さに回復してゆく性質を持つものを言う。In the structure of claim 1, the closed cell resin foam having a shape recovering property means that when compressive strain is applied, the internal pressure of the closed cells forming the foam rises, and immediately after removing the external force. The foam instantly recovers to its original shape, but if the strain is maintained for a predetermined time or longer, the gas permeability of the resin causes the gas in the bubbles to gradually escape from the bubble film, and the internal pressure and the external pressure balance, Even if the external force is removed, instantaneous shape recovery does not occur, and when the compression is released, it has the property of gradually recovering to the original thickness while being balanced with the internal and external pressure of the bubbles by the elastic recovery force of the resin.

【０００９】但し、必ずしも元の厚さに回復する必要は
なく、必要とする厚さまで回復すればよく、従って当初
の圧縮も必ずしも完全な弾性領域内で圧縮させる場合の
みならず、一部塑性変形する領域を含んで圧縮してもよ
い。独立気泡樹脂発泡体の独立気泡率は、圧縮発泡体自
体の必要とする回復量により決まり、おおよそ５％以上
であれば使用することが可能であるが、特に好ましい範
囲は６０％〜１００％である。However, it is not always necessary to recover to the original thickness, and it is sufficient to recover to the required thickness. Therefore, the initial compression is not limited to the case of compressing in the complete elastic region, and partly plastic deformation. You may compress including the area | region to perform. The closed cell rate of the closed cell resin foam is determined by the amount of recovery required for the compressed foam itself, and can be used if it is approximately 5% or more, but a particularly preferable range is 60% to 100%. is there.

【００１０】成形体の形状は、特に限定されず、たとえ
ば、シート状、ロッド状、チューブ状またはこれらの積
層体が挙げられる。独立気泡樹脂発泡体を構成する樹脂
としては、特に限定されないが、圧縮永久歪み（ＪＩＳ
Ｋ６７６７に準拠）が２０％以下のもの、特に１０％以
下のものが形状回復性に優れ好ましい。The shape of the molded body is not particularly limited, and examples thereof include a sheet shape, a rod shape, a tube shape or a laminated body of these. The resin constituting the closed-cell resin foam is not particularly limited, but may be compression set (JIS
It is preferable that the content of the resin (according to K6767) is 20% or less, particularly 10% or less because of excellent shape recoverability.

【００１１】このような樹脂としては、以下のような熱
可塑性樹脂あるいは熱硬化性樹脂が挙げれる。Examples of such resins include the following thermoplastic resins and thermosetting resins.

【００１２】〔熱可塑性樹脂〕ポリエチレン，ポリプロ
ピレン，エチレン−プロピレン共重合体，エチレン−プ
ロピレン−ジエン共重合体，エチレン−酢酸ピニル共重
合体等のオレフィン系樹脂、ポリメチルアクリレート，
ポリメチルメタクレート，エチレン−エチルアクリレー
ト共重合体等のアクリル系樹脂、ブタジエン−スチレ
ン，アクリロニトリル−スチレン，スチレン，スチレン
−ブタジエン−スチレン，スチレン−イソブレン−スチ
レン，スチレン−アクリル酸等のスチレン系樹脂、アク
リロニトリル−ポリ塩化ビニル，ポリ塩化ビニル−エチ
レン等の塩化ビニル系樹脂、ポリフッ化ビニル，ポリフ
ッ化ビニリデン等のフッ化ビニル系樹脂、６−ナイロ
ン，６・６−ナイロン，１２−ナイロン等のアミド樹
脂、ポリエチレンテレフタレート，ポリブチレンテレフ
タレート等の飽和エステル系樹脂、ポリカーボネート、
ポリフェニレンオキサイド、ポリアセタール、ポリフェ
ニレンスルフィド、シリコーン樹脂、熱可塑性ウレタン
樹脂、ポリエーテルエーテルケトン、ポリエーテルイミ
ド、各種エラストマーやこれらの架橋体。[Thermoplastic Resin] Olefin resin such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-pinyl acetate copolymer, polymethyl acrylate,
Acrylic resins such as polymethylmethacrylate and ethylene-ethyl acrylate copolymer, styrene resins such as butadiene-styrene, acrylonitrile-styrene, styrene, styrene-butadiene-styrene, styrene-isobrene-styrene, styrene-acrylic acid, Vinyl chloride resins such as acrylonitrile-polyvinyl chloride, polyvinyl chloride-ethylene, vinyl fluoride resins such as polyvinyl fluoride and polyvinylidene fluoride, amide resins such as 6-nylon, 6,6-nylon, 12-nylon Saturated polyethylene resin such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate,
Polyphenylene oxide, polyacetal, polyphenylene sulfide, silicone resin, thermoplastic urethane resin, polyether ether ketone, polyether imide, various elastomers and cross-linked products thereof.

【００１３】〔熱硬化性樹脂〕エポキシ系樹脂、フェノ
ール系樹脂、メラミン系樹脂、ウレタン系樹脂、イミド
系樹脂、ユリア系樹脂、シリコーン系樹脂、不飽和ポリ
エステル系樹脂の硬化物等。なお、これらの樹脂は単独
で用いても２種以上併用しても良い。[Thermosetting Resin] A cured product of epoxy resin, phenol resin, melamine resin, urethane resin, imide resin, urea resin, silicone resin, unsaturated polyester resin, and the like. These resins may be used alone or in combination of two or more.

【００１４】また、上記樹脂の中でも、特に形状回復性
に優れるものとして、オレフィン樹脂、スチレン系樹
脂、アミド系樹脂、アクリル共重合体、軟質ポリウレタ
ン、軟質塩化ビニル樹脂、ポリアセタール、シリコーン
樹脂、各種エラストマーが特に挙げられる。発泡方法
は、プラスチックフォームハンドブックに記載されてい
る方法を含め公知の方法が挙げられ、いずれの方法を用
いても構わない。Among the above-mentioned resins, olefin resins, styrene resins, amide resins, acrylic copolymers, soft polyurethanes, soft vinyl chloride resins, polyacetals, silicone resins and various elastomers are particularly excellent in shape recovery. Is especially mentioned. Known foaming methods, including those described in the Plastic Foam Handbook, may be used, and any method may be used.

【００１５】一方、請求項２に記載の発明にかかる圧縮
発泡体の製造方法（以下、「請求項２の製造方法」と記
す）は、まず、その厚み方向に圧縮したのち、この圧縮
状態を保持しつつ連続的に巻回するようにした。他方、
請求項３に記載の発明にかかる圧縮発泡体の製造方法
（以下、「請求項３の製造方法」と記す）は、形状回復
性を有する独立気泡樹脂発泡体からなる長尺成形体の一
側面に通気性を沿わせながら、長尺成形体をその厚み方
向に圧縮したのち、帯状体の張力によって圧縮状態を保
持しつつ長尺成形体を帯状体とともに連続的に巻回する
ようにした。On the other hand, in the method for producing a compressed foam according to the invention of claim 2 (hereinafter referred to as "the production method of claim 2"), first, the compressed state is obtained by compressing in the thickness direction. It was designed to be wound continuously while being held. On the other hand,
A method for producing a compressed foam according to the invention of claim 3 (hereinafter referred to as "the production method of claim 3") is directed to one side surface of a long molded article made of a closed cell resin foam having shape recoverability. After the long molded body was compressed in the thickness direction while keeping the air permeability to, the long molded body was continuously wound together with the band body while maintaining the compressed state by the tension of the band body.

【００１６】また、請求項４に記載の発明にかかる圧縮
発泡体の製造方法（以下、「請求項４の製造方法」と記
す）は、請求項３の製造方法において、帯状体に、巻回
によって長尺成形体に突き刺さり小孔を穿設する針状体
を長尺成形体と当接する面に設けるようにした。The method for producing a compressed foam according to the invention of claim 4 (hereinafter referred to as "the production method of claim 4") is the same as that of the production method of claim 3, wherein the strip is wound around. Thus, a needle-shaped body that pierces the elongated molded body and pierces a small hole is provided on the surface that contacts the elongated molded body.

【００１７】上記請求項２〜４の製造方法の構成におい
て、巻回時の温度条件は、独立気泡樹脂発泡体を構成す
る樹脂の軟化点（非晶性樹脂についてはガラス転移点、
結晶性樹脂については融点を軟化点とする）以下であ
る。すなわち、軟化点以上で圧縮しつつ巻回を行った場
合、圧縮を解除しても発泡体の形状回復能がなくなる。
また、請求項３および請求項４の製造方法において、帯
状体は、圧縮した成形体を所望の厚みに保持するのに必
要な強度を有し、通気性（ガス透過性）を備えたもので
あれば、特に限定されず、たとえば、樹脂フィルムや金
属メッシュが挙げられるが、成形体の圧縮にようする時
間を短縮させるには、通気性の大きいものが好ましい。In the structure of the above-mentioned manufacturing method according to claims 2 to 4, the temperature condition at the time of winding is such that the softening point of the resin constituting the closed-cell resin foam (the glass transition point for the amorphous resin,
For the crystalline resin, the melting point is the softening point) or lower. That is, when the coil is wound while being compressed at the softening point or higher, the shape recovery ability of the foam is lost even if the compression is released.
Moreover, in the manufacturing method of Claim 3 and Claim 4, the strip | belt has the intensity | strength required in order to hold | maintain the compressed molded object in desired thickness, and is equipped with gas permeability (gas permeability). It is not particularly limited as long as it is present, and examples thereof include a resin film and a metal mesh. However, in order to shorten the time required for compression of the molded body, a material having high air permeability is preferable.

【００１８】請求項４の製造方法において、針状体の断
面形状は、特に限定されないが、たとえば、円形，矩
形，星形等が挙げられ、先端に向かって断面積が漸次減
少していくような形状が好ましい。針状体の間隔は、特
に限定されないが、針状体の断面が気泡径より小さい場
合、気泡径の２倍以上とし、針状体の断面が気泡径より
大きい場合、隣接する針状体との距離が気泡径以上とす
ることが好ましい。In the manufacturing method of the fourth aspect, the cross-sectional shape of the needle-shaped body is not particularly limited, but for example, a circular shape, a rectangular shape, a star shape, etc. can be mentioned, and the cross-sectional area gradually decreases toward the tip. Preferred shapes are preferred. The distance between the needle-shaped bodies is not particularly limited, but if the cross-section of the needle-shaped bodies is smaller than the bubble diameter, it should be at least twice the bubble diameter. It is preferable that the distance is equal to or larger than the bubble diameter.

【００１９】針状体の長さは、得ようとする形状回復性
発泡体の厚みと略同じか少し短い程度が好ましい。ま
た、針状体の表面は、突き刺される時あるいは引き抜く
時の摩擦抵抗を低減するために、摩擦係数の小さい樹脂
やセラミックなどの材料によってコーティングされてい
ることが好ましい。The length of the needle-shaped body is preferably approximately the same as or slightly shorter than the thickness of the shape-recoverable foam to be obtained. Further, the surface of the needle-shaped body is preferably coated with a material such as resin or ceramic having a small friction coefficient in order to reduce frictional resistance at the time of being pierced or pulled out.

【００２０】コーティング層を形成する樹脂としては、
特に限定されないが、たとえば、ポリテトラフルオロエ
チレン（ＰＴＦＥ）、テトラフルオロエチレン−ヘキサ
フルオロプロピレン共重合体（ＦＥＰ）、ポリクロロト
リフルオロエチレン（ＰＣＴＦＥ）、ポリビニルフルオ
ライド（ＰＶＦ）、ポリビニリデンフルオライド（ＰＶ
ＤＦ）、ポリクロロトリフルオロエチレン−エチレン共
重合体（Ｅ−ＣＴＦＥ）、ポリフルオロアルコキシエチ
レン（ＰＦＡ）などが挙げられる。As the resin forming the coating layer,
Although not particularly limited, for example, polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), polychlorotrifluoroethylene (PCTFE), polyvinyl fluoride (PVF), polyvinylidene fluoride ( PV
DF), polychlorotrifluoroethylene-ethylene copolymer (E-CTFE), polyfluoroalkoxyethylene (PFA) and the like.

【００２１】一方、コーティング層を形成するセラミッ
クとしては、特に限定されないが、たとえば、窒化チタ
ン（ＴｉＮ）、炭窒化チタン（ＴｉＣＮ）などが挙げら
れる。On the other hand, the ceramic forming the coating layer is not particularly limited, but examples thereof include titanium nitride (TiN) and titanium carbonitride (TiCN).

【００２２】[0022]

【発明の実施の形態】以下に、本発明の実施の形態を詳
しく説明する。図１は請求項２の製造方法の実施の形態
をあらわしている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below. FIG. 1 shows an embodiment of the manufacturing method of claim 2.

【００２３】図１に示すように、この製造方法は、独立
気泡樹脂発泡体からなる長尺成形体１を、圧縮ロール２
と金属製の無端ベルト３の端部の変向ロール３１との間
で挟み込み所定の厚みまで厚み方向に圧縮したのち、無
端ベルト３によって巻き込みロール４側へ押圧しながら
巻き込みロール４に連続的に巻き込み圧縮発泡体５を連
続的に得るようになっている。As shown in FIG. 1, in this manufacturing method, a long molded body 1 made of a closed-cell resin foam is compressed into a compression roll 2.
It is sandwiched between the endless belt 3 made of metal and the deflecting roll 31 at the end of the endless belt 3 and compressed in a thickness direction to a predetermined thickness. The rolled-in compressed foam 5 is continuously obtained.

【００２４】すなわち、この製造方法によれば、先に圧
縮された部分の上から次々に後から圧縮された部分が巻
回されていくため、先に圧縮された部分が後から圧縮し
た部分によって上方から押圧され、圧縮状態が保たれ
る。That is, according to this manufacturing method, the previously compressed portions are successively wound on the previously compressed portions, so that the previously compressed portions may be wound by the later compressed portions. It is pressed from above and the compressed state is maintained.

【００２５】したがって、得られた圧縮発泡体５は、最
先端部分を固定しておいただけで、簡単に長期間圧縮状
態を保つことができる。また、圧縮発泡体５は、必要長
さだけ切取り、隙間に挿入しシール材等として使用でき
る。Therefore, the obtained compressed foam 5 can be easily kept in a compressed state for a long period of time only by fixing the tip end portion. Further, the compressed foam body 5 can be cut to a required length and inserted into a gap to be used as a sealing material or the like.

【００２６】すなわち、隙間に挿入された直後の圧縮発
泡体５は、圧縮力が解除されているが、独立気泡の内圧
と外圧とが釣り合っており、瞬間的な形状回復は起こら
ず、樹脂の弾性回復力により気泡の内外圧力と釣り合い
ながら徐々にもとの厚さを回復してゆく。そして、圧縮
発泡体はこの弾性回復によって隙間に沿う形状に膨張し
隙間内に密に充填されるようになる。That is, the compression force of the compressed foam 5 immediately after being inserted into the gap is released, but the internal pressure and the external pressure of the closed cells are balanced, and the instantaneous shape recovery does not occur, and the resin The elastic recovery force gradually recovers the original thickness while balancing the internal and external pressures of the bubbles. Then, due to this elastic recovery, the compressed foam expands into a shape along the gap and becomes densely filled in the gap.

【００２７】図２は請求項３の製造方法の実施の形態を
あらわしている。図２に示すように、この製造方法は、
長尺成形体１に金属製メッシュからなる帯状体６を沿わ
せ、この帯状体６とともに圧縮ロール２と巻取りロール
４との間に長尺成形体１を挟み込み長尺成形体１を所望
の厚みまで厚み方向に圧縮し、帯状体６に所定の張力を
かけながら巻取りロール４に連続的に巻き込み圧縮発泡
体５を連続的に得るようになっている。FIG. 2 shows an embodiment of the manufacturing method of claim 3. As shown in FIG. 2, this manufacturing method
A strip-shaped body 6 made of a metal mesh is placed along the strip-shaped molded body 1, and the strip-shaped body 6 is sandwiched between the compression roll 2 and the winding roll 4 to form the strip-shaped molded body 1 as desired. The compressed foamed body 5 is continuously obtained by compressing to the thickness direction in the thickness direction and continuously winding it on the winding roll 4 while applying a predetermined tension to the belt-shaped body 6.

【００２８】すなわち、この製造方法によれば、先に圧
縮された部分の上から次々に帯状体６を介して圧縮され
た部分が巻回されていく。そして、先に圧縮された部分
が後から圧縮した部分によって上方から押圧され、より
しっかりと圧縮状態が保たれる。したがって、得られた
圧縮発泡体５は、最先端部分を固定しておくだけで、簡
単に長期間圧縮状態を保つことができる。That is, according to this manufacturing method, the compressed portions are successively wound from above the previously compressed portions via the strip-shaped body 6. Then, the previously compressed portion is pressed from above by the later compressed portion, and the compressed state is more firmly maintained. Therefore, the obtained compressed foam body 5 can be easily kept in a compressed state for a long period of time only by fixing the tip end portion.

【００２９】図３は請求項４の製造方法の実施の形態を
あらわしている。図３に示すように、この製造方法は、
長尺成形体１に、金属製メッシュからな帯状体６´を沿
わせ、この帯状体６´とともに圧縮ロール２と巻取りロ
ール４との間に長尺成形体１を挟み込み長尺成形体１を
所望の厚みまで厚み方向に圧縮し、帯状体６に所定の張
力をかけながら巻取りロール４に連続的に巻き込んで圧
縮発泡体５´を得るようになっている。FIG. 3 shows an embodiment of the manufacturing method of claim 4. As shown in FIG.
A strip-shaped body 6 ′ made of a metal mesh is placed along the long-sized molded body 1, and the long-sized molded body 1 is sandwiched between the strip-shaped body 6 ′ and the compression roll 2 and the winding roll 4 together. Is compressed to a desired thickness in the thickness direction, and is continuously wound around the winding roll 4 while applying a predetermined tension to the strip-shaped body 6 to obtain a compressed foam 5 '.

【００３０】しかも、帯状体６´の長尺成形１との当接
面側に得ようとする圧縮発泡体５´の厚みと略同じ長さ
の針状体６１が所定ピッチで垂設されていて、巻き込み
と同時に、この針状体６１が長尺成形体１に突き刺さる
ようになっている。すなわち、この製造方法によれば、
長尺成形体１を圧縮する際に、帯状体６´に設けられた
針状体６１が刺さり、長尺成形体１を構成する独立気泡
の一部に孔が穿設され、一部に外部に連通する連続気泡
部分が形成される。Moreover, needle-like bodies 61 having a length substantially the same as the thickness of the compressed foam 5'to be obtained are vertically provided at a predetermined pitch on the contact surface side of the strip-shaped body 6'with the elongated molding 1. Then, at the same time as the winding, the needle-shaped body 61 pierces the long molded body 1. That is, according to this manufacturing method,
When the long molded body 1 is compressed, the needle-shaped body 61 provided on the strip-shaped body 6'is pierced, a hole is formed in a part of the closed cells constituting the long molded body 1, and an external part is formed. To form an open cell portion communicating with.

【００３１】したがって、得られた圧縮成形体５´は、
形状回復する際に、この連続気泡部分によって圧縮発泡
体５´の内部の独立気泡部分が外気に曝されることにな
り、全く孔のない圧縮成形体５に比べ、はやく形状回復
が進む。また、この製造方法によれば、針状体６１の
径、ピッチ等を代えることによって形状回復時間のコン
トロールを自由に行えるようになる。Therefore, the obtained compression molded body 5'is
When the shape is restored, the closed-cell portion inside the compressed foam 5 ′ is exposed to the outside air by the open-cell portion, and the shape is restored more quickly than the compression-molded body 5 having no holes. Further, according to this manufacturing method, the shape recovery time can be freely controlled by changing the diameter, pitch, etc. of the needle-shaped bodies 61.

【００３２】[0032]

【実施例】以下に、本発明を、その実施例を参照しつつ
詳しく説明する。 （実施例１）図１に示す製造方法と同様に、独立気泡樹
脂発泡体からなる長尺成形体１としてのアクリロニトリ
ル−ブタジエン−スチレン共重合体（ＡＢＳ、住友ダウ
社製クララスチックＫ−３１０１）を炭酸ガスで発泡さ
せたシート状成形体（発泡倍率２５倍、長さ１００ｍ、
幅約１００ｍｍ、厚さ１２ｍｍ、独立気泡率８０％）
を、圧縮ロール２と金属製の無端ベルト３の端部の変向
ロール３１との間で挟み込み６ｍｍ厚（１／２の厚み）
まで厚み方向に圧縮したのち、無端ベルト３によって巻
き込みロール４側へ押圧しながら巻き込みロール４に連
続的に巻き込み６ｍｍ厚の圧縮発泡体５を連続的に得
た。EXAMPLES The present invention will be described in detail below with reference to its examples. (Example 1) Similar to the manufacturing method shown in FIG. 1, an acrylonitrile-butadiene-styrene copolymer (ABS, Sumitomo Dow Clarastic K-3101) as a long molded body 1 made of a closed-cell resin foam. A sheet-like molded body obtained by foaming carbon dioxide gas (foaming ratio 25 times, length 100 m,
Width about 100 mm, thickness 12 mm, closed cell rate 80%)
Is sandwiched between the compression roll 2 and the diverting roll 31 at the end of the metal endless belt 3 and has a thickness of 6 mm (1/2 thickness).
After being compressed in the thickness direction, the endless belt 3 continuously presses the winding roll 4 side and continuously winds the winding roll 4 to obtain a compressed foam 5 having a thickness of 6 mm.

【００３３】このようにして得た圧縮発泡体５を３日間
放置したところその厚みが７ｍｍとなり、３０日間放置
したところ、９ｍｍまで厚みが回復した。なお、無端ベ
ルト３は、巻取りロール４に巻き取られた圧縮発泡体５
の厚みに応じて巻取りロール４の半径方向に移動するよ
うになっている。When the compressed foam 5 thus obtained was allowed to stand for 3 days, its thickness became 7 mm, and when allowed to stand for 30 days, the thickness recovered to 9 mm. The endless belt 3 is made up of the compressed foam 5 wound around the winding roll 4.
The winding roll 4 is moved in the radial direction according to the thickness of the roll.

【００３４】（実施例２）長尺成形体１として、発泡剤
としてのアゾジカルボンアミド（ＡＤＣＡ、大塚化学社
製ユニフォームＳＯＬ）を含む低密度ポリエチレン（Ｌ
ＤＰＥ、三菱油化社製ＺＣ３０）を電子線照射で架橋さ
せたシートを、さらに加熱発泡させて得たシート状発泡
体（発泡倍率３０倍、長さ２０ｍ、幅５０ｍｍ、厚さ１
０ｍｍ、独立気泡率８３％）を用い、実施例１と同様に
して１mm厚み（１／１０）の圧縮発泡体５を得た。(Example 2) As a long molded body 1, low density polyethylene (L) containing azodicarbonamide (ADCA, uniform SOL manufactured by Otsuka Chemical Co., Ltd.) as a foaming agent was used.
A sheet-like foam obtained by further heat-foaming a sheet obtained by crosslinking DPE and ZC30 manufactured by Mitsubishi Petrochemical Co., Ltd. by electron beam irradiation (foaming ratio 30 times, length 20 m, width 50 mm, thickness 1).
A compressed foam 5 having a thickness of 1 mm (1/10) was obtained in the same manner as in Example 1 by using 0 mm and a closed cell ratio of 83%.

【００３５】このようにして得た圧縮発泡体５を３日間
放置したところその厚みが３ｍｍとなり、３０日間放置
したところ、９ｍｍまで厚みが回復した。When the compressed foam 5 thus obtained was left for 3 days, the thickness became 3 mm, and when left for 30 days, the thickness recovered to 9 mm.

【００３６】（実施例３）図２示す製造方法と同様に、
長尺成形体１としての低密度ポリエチレン（ＬＤＰＥ、
三菱油化社製ＺＣ３０）を炭酸ガス発泡させた発泡体
（発泡倍率２０倍、長さ１０ｍ、幅５０ｍｍ、厚さ１０
ｍｍ、独立気泡率８５％）に帯状体６としての金属製メ
ッシュ（ステンレス製、幅７０ｍｍ、線径０．３ｍｍ、
１５０ｍｅｓｈ）を沿わせ、この金属製メッシュととも
に圧縮ロール２と巻取りロール４との間に長尺成形体１
を挟み込み長尺成形体１を１ｍｍ厚（１／１０の厚み）
まで厚み方向に圧縮し、金属製メッシュに所定の張力を
かけながら巻取りロール４に連続的に巻き込み１ｍｍ厚
の圧縮発泡体５を連続的に得た。(Embodiment 3) Similar to the manufacturing method shown in FIG.
Low-density polyethylene (LDPE, as the long molded body 1)
Mitsubishi Petrochemical Co., Ltd. ZC30) foamed with carbon dioxide gas (foaming ratio 20 times, length 10 m, width 50 mm, thickness 10)
mm, closed cell rate 85%, metal mesh as the strip 6 (stainless steel, width 70 mm, wire diameter 0.3 mm,
150 mesh) along with the metal mesh between the compression roll 2 and the winding roll 4
1 mm thick (1/10 thickness)
Was compressed in the thickness direction, and was continuously wound around the winding roll 4 while applying a predetermined tension to the metal mesh to continuously obtain a compressed foam 5 having a thickness of 1 mm.

【００３７】このようにして得た圧縮発泡体５を２日間
放置したところその厚みが２ｍｍとなり、３０日間放置
したところ、９ｍｍまで厚みが回復した。When the compressed foam 5 thus obtained was left for 2 days, its thickness became 2 mm, and when left for 30 days, the thickness recovered to 9 mm.

【００３８】（実施例４）長尺成形体１として、発泡剤
としてのアゾジカルボンアミド（ＡＤＣＡ、大塚化学社
製ユニフォームＳＯＬ）を含むポリウレタン−塩化ビニ
ル共重合樹脂（日本ポリウレタン工業社製、ＤＯＭＩＮ
ＡＳＫ−９００Ａ）をシート状に成形し、その後発泡さ
せたシート状発泡体（発泡倍率２０倍、長さ１００Ｍ、
幅約５０ｍｍ、厚さ３０ｍｍ、独立気泡率５０％）を用
い、実施例３と同様にして３ｍｍ厚（１／１０の厚み）
の圧縮発泡体５を連続的に得た。Example 4 A polyurethane-vinyl chloride copolymer resin (manufactured by Nippon Polyurethane Industry Co., Ltd., DOMIN) containing azodicarbonamide (ADCA, uniform SOL manufactured by Otsuka Chemical Co., Ltd.) as a foaming agent was used as the long molded body 1.
ASK-900A) is molded into a sheet and then foamed (foaming ratio 20 times, length 100M,
Using a width of about 50 mm, a thickness of 30 mm, and a closed cell rate of 50%, a thickness of 3 mm (1/10 thickness) is obtained in the same manner as in Example 3.
The compressed foam 5 of was continuously obtained.

【００３９】このようにして得た圧縮発泡体５を５日間
放置したところその厚みが７ｍｍとなり、３５日間放置
したところ、２７ｍｍまで厚みが回復した。The compressed foam 5 thus obtained was allowed to stand for 5 days to have a thickness of 7 mm. When left for 35 days, the thickness recovered to 27 mm.

【００４０】（実施例５）図３に示す製造方法と同様
に、長尺成形体１としての、アゾジカルボンアミド（Ａ
ＤＣＡ、大塚化学社製ユニフォームＳＯＬ）２０重量部
とステアリン酸亜鉛２重量部が発泡剤として含まれた低
密度ポリエチレン（ＬＤＰＥ、三菱油化社製ＺＣ３０）
を電子線照射で架橋させたシートを、さらに加熱発泡さ
せて得たシート状発泡体（発泡倍率４１倍、長さ２０
ｍ、幅１００ｍｍ、厚さ８ｍｍ、独立気泡率８０％）
に、帯状体６´として長さ４ｍｍ、根元径０．５ｍｍの
円錐形をした針状体６１が１０ｍｍ間隔（孔密度：１孔
／cm² ）で設けられた幅１２０ｍｍ、厚さ０．１ｍｍの
ステンレス製ベルトを沿わせ、ステンレス製ベルトとと
ともに圧縮ロール２と巻取りロール４との間に長尺成形
体１を挟み込み長尺成形体１を４ｍｍ厚（１／２の厚
み）まで厚み方向に圧縮し、このステンレス製ベルトに
張力をかけながら巻取りロール４に連続的に巻き込み４
ｍｍ厚の圧縮発泡体５´を連続的に得た。(Embodiment 5) Similar to the manufacturing method shown in FIG. 3, azodicarbonamide (A
Low density polyethylene containing 20 parts by weight of DCA and Otsuka Chemical's uniform SOL) and 2 parts by weight of zinc stearate as a foaming agent (LDPE, ZC30 manufactured by Mitsubishi Petrochemical Co., Ltd.)
The sheet-like foam obtained by further heat-foaming a sheet obtained by cross-linking the above by electron beam irradiation (foaming ratio 41 times, length 20
m, width 100 mm, thickness 8 mm, closed cell rate 80%)
The length 4mm as strip 6 ', needles 61 10mm intervals in which the conical base diameter 0.5 mm (hole density: 1 hole / cm ²⁾ Width 120mm provided in a thickness of 0.1mm Along with the stainless steel belt, the long molded body 1 is sandwiched between the compression belt 2 and the winding roll 4 together with the stainless steel belt, and the long molded body 1 has a thickness direction of 4 mm (1/2 thickness). And then continuously wind it up onto the winding roll 4 while applying tension to this stainless steel belt.
A mm-thick compressed foam 5'was continuously obtained.

【００４１】このようにして得た圧縮発泡体を１２時間
放置したところ、その厚みが４ｍｍとなり、７．５ｍｍ
まで形状回復するのに２０日間かかった。When the compressed foam thus obtained was left to stand for 12 hours, its thickness became 4 mm, and 7.5 mm
It took 20 days to recover the shape.

【００４２】（実施例６）針状体６１の間隔を５ｍｍ間
隔（孔密度：４孔／cm² ）とした以外は、実施例５と同
様にして圧縮成形体５´を連続的に得た。このようにし
て得た圧縮発泡体５´を放置したところ、７．５ｍｍま
で回復するのに８日間かかった。(Example 6) A compression molded body 5'was continuously obtained in the same manner as in Example 5 except that the intervals between the needle-shaped bodies 61 were 5 mm (pore density: 4 holes / cm ² ). . When the compressed foam 5'obtained in this way was left to stand, it took 8 days to recover to 7.5 mm.

【００４３】（実施例７）針状体６１の間隔を３．５ｍ
ｍ間隔（孔密度：８孔／cm² ）とした以外は、実施例５
と同様にして圧縮成形体５´を連続的に得た。このよう
にして得た圧縮発泡体５´を放置したところ、７．５ｍ
ｍまで回復するのに４日間かかった。(Embodiment 7) The distance between the needle-shaped bodies 61 is 3.5 m.
Example 5 except that m intervals (pore density: 8 holes / cm ² ) were used.
A compression molded body 5'was continuously obtained in the same manner as in. The compressed foam 5'obtained in this way was left to stand for 7.5 m.
It took 4 days to recover to m.

【００４４】（実施例８）針状体が全くない金属ベルト
を帯状体６として用いた以外は、実施例５と同様にして
圧縮発泡体５を連続的に得た。このようにして得た圧縮
発泡体５を放置したところ、７．５ｍｍまで回復するの
に３５日間かかった。(Example 8) A compressed foam 5 was continuously obtained in the same manner as in Example 5 except that a metal belt having no needle-shaped body was used as the belt-shaped body 6. When the compressed foam 5 thus obtained was left to stand, it took 35 days to recover to 7.5 mm.

【００４５】（実施例９）アゾジカルボンアミドの添加
量を１５重量部にした以外は、実施例８と同様にして圧
縮発泡体５を連続的に得た。このようにして得た圧縮発
泡体５を放置したところ、７．５ｍｍまで回復するのに
３０日間かかった。Example 9 A compressed foam 5 was continuously obtained in the same manner as in Example 8 except that the addition amount of azodicarbonamide was changed to 15 parts by weight. When the compressed foam 5 thus obtained was left to stand, it took 30 days to recover to 7.5 mm.

【００４６】なお、シート状発泡体は、発泡倍率３１
倍、長さ２０ｍ、幅１００ｍｍ、厚さ８ｍｍ、独立気泡
率８０％であった。The sheet foam has a foaming ratio of 31.
The length was 20 m, the width was 100 mm, the thickness was 8 mm, and the closed cell ratio was 80%.

【００４７】（比較例１）圧縮用の無端ベルト３を用い
ず、巻き取り時の引張力のみで巻き取った以外は、実施
例２と同様にして圧縮発泡体を得ようとしたところ、発
泡体は９ｍｍ程度にしか圧縮されなかった。 （比較例２）圧縮ロール２を用いず、巻き取り時の引張
力のみで巻き取った以外は、実施例２と同様にして圧縮
発泡体を得ようとしたところ、発泡体は９ｍｍ程度にし
か圧縮されなかった。Comparative Example 1 A compressed foam was obtained in the same manner as in Example 2 except that the endless belt 3 for compression was not used and only the pulling force at the time of winding was used. The body was only compressed to around 9 mm. (Comparative Example 2) A compressed foam was obtained in the same manner as in Example 2 except that the compression roll 2 was not used and only the pulling force at the time of winding was taken up. It was not compressed.

【００４８】なお、本発明にかかる圧縮発泡体は、上記
の実施例に限定されない。たとえば、上記実施例の製造
方法で得た圧縮発泡体を所望の大きさに切断したのち、
１枚ずつ或いは多層に積み重ね、圧縮発泡体の圧縮状態
が保たれるように包装し、施工時にこの包装を解き、１
枚ずつ使用するようにしても構わない。The compressed foam according to the present invention is not limited to the above embodiment. For example, after cutting the compressed foam obtained by the manufacturing method of the above embodiment into a desired size,
Stack them one by one or in multiple layers and wrap them so that the compressed foam is kept in a compressed state.
You may use it one by one.

【００４９】[0049]

【発明の効果】請求項１の圧縮発泡体は、以上のように
施工時には、収縮しているので、狭い隙間にでも容易に
施工でき、しかも、施工後空気が気泡内に入り込み膨張
するので、隙間に密に充填されるようになる。したがっ
て、気密性、断熱性、シール性に優れ、パイプ用断熱
材、建材用断熱材、包装用緩衝材、車輛等の内装用緩衝
材、建物用シール材、目地材等の多方面に有効に適用で
きる。As described above, the compressed foam according to the present invention is contracted at the time of construction as described above, so that it can be easily installed even in a narrow gap, and after the installation, air enters the bubbles and expands. The gap will be filled tightly. Therefore, it is excellent in airtightness, heat insulation, and sealability, and is effective in various fields such as pipe insulation, building insulation, cushioning material for packaging, cushioning material for interiors such as vehicles, sealing material for buildings, joint material, etc. Applicable.

【００５０】請求項２〜請求項４の製造方法は、上記圧
縮発泡体を連続的に効率よく製造することができる。し
かも、圧縮発泡体が連続的に巻き込まれていくため、下
方に巻き込まれた部分が上方に巻き込まれた部分によっ
て巻き締められて押圧されるため、最先端部分を固定し
ておけば、簡単に長期間圧縮状態で保存することができ
る。According to the manufacturing methods of claims 2 to 4, the compressed foam can be manufactured continuously and efficiently. Moreover, since the compressed foam is continuously rolled up, the lower rolled up portion is tightened and pressed by the upper rolled up portion. It can be stored in a compressed state for a long time.

【００５１】特に請求項３の製造方法によれば、帯状体
によって圧縮発泡体が巻き締められるから、圧縮発泡体
の長手方向にも均一に圧縮を加えることができ、より均
質な圧縮発泡体を得ることができる。また、請求項４の
製造方法によれば、圧縮発泡体の形状回復時間を自由に
コントロールできる。In particular, according to the manufacturing method of claim 3, since the compressed foam is wound up by the band-shaped body, the compression can be uniformly applied in the longitudinal direction of the compressed foam, and a more homogeneous compressed foam can be obtained. Obtainable. Further, according to the manufacturing method of the fourth aspect, the shape recovery time of the compressed foam can be freely controlled.

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

【図１】請求項２の製造方法の１例をあらわす説明図で
ある。FIG. 1 is an explanatory view showing an example of a manufacturing method of claim 2.

【図２】請求項３の製造方法の１例をあらわす説明図で
ある。FIG. 2 is an explanatory view showing an example of the manufacturing method of claim 3;

【図３】請求項４の製造方法の１例をあらわす説明図で
ある。FIG. 3 is an explanatory view showing an example of the manufacturing method of claim 4.

【符号の説明】[Explanation of symbols]

１ 長尺成形体 ５ 圧縮成形体 ５´ 圧縮成形体 ６ 帯状体 ６´ 帯状体 ６１ 針状体 1 Long Formed Body 5 Compression Formed Body 5'Compression Formed Body 6 Banded Body 6'Banded Body 61 Needle Body

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】形状回復性を有する独立気泡樹脂発泡体か
らなる成形体が、少なくとも一方向から圧縮された状態
に保持されていることを特徴とする圧縮発泡体。1. A compressed foam comprising a molded body of a closed cell resin foam having a shape recovering property, which is held in a compressed state from at least one direction. 【請求項２】形状回復性を有する独立気泡樹脂発泡体か
らなる長尺成形体を、まず、その厚み方向に圧縮したの
ち、この圧縮状態を保持しつつ連続的に巻回する圧縮発
泡体の製造方法。2. A compressed foam body, which is obtained by first compressing an elongated molded body made of a closed-cell resin foam having shape recoverability in its thickness direction and then continuously winding the compressed foam while maintaining this compressed state. Production method. 【請求項３】形状回復性を有する独立気泡樹脂発泡体か
らなる長尺成形体の一側面に通気性を有する帯状体を沿
わせながら、長尺成形体をその厚み方向に圧縮したの
ち、前記帯状体の張力によって圧縮状態を保持しつつ長
尺成形体を帯状体とともに連続的に巻回する圧縮発泡体
の製造方法。3. A long molded body is compressed in the thickness direction while a breathable band-shaped body is provided along one side of a long molded body made of a closed cell resin foam having shape recovery property, A method for producing a compressed foam, in which a long molded body is continuously wound together with a strip while maintaining a compressed state by the tension of the strip. 【請求項４】帯状体が、巻回によって長尺成形体に突き
刺さり小孔を穿設する針状体を長尺成形体と当接する面
に備えている請求項３に記載の圧縮発泡体の製造方法。4. The compressed foam according to claim 3, wherein the band-shaped body is provided with a needle-shaped body which pierces the elongated molded body by winding to form a small hole on a surface which abuts against the elongated molded body. Production method.