JP2005162478A - Core - Google Patents

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JP2005162478A
JP2005162478A JP2004239015A JP2004239015A JP2005162478A JP 2005162478 A JP2005162478 A JP 2005162478A JP 2004239015 A JP2004239015 A JP 2004239015A JP 2004239015 A JP2004239015 A JP 2004239015A JP 2005162478 A JP2005162478 A JP 2005162478A
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sheet
core
cylindrical body
winding
foamed resin
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JP3964892B2 (en
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Takahiro Fuji
高広 藤
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NAGAOKA SANGYO KK
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NAGAOKA SANGYO KK
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/04—Kinds or types
    • B65H75/08—Kinds or types of circular or polygonal cross-section
    • B65H75/10—Kinds or types of circular or polygonal cross-section without flanges, e.g. cop tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

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  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core of a film, quickly coping with setting and dirt of a shock absorbing layer at a low cost without generating an end face step mark in a core part. <P>SOLUTION: In this core for a film, an elastic layer is bonded to the surface of a cylindrical body to freely adhere to and separate from it. The elastic layer is formed of a sheet containing foam resin or elastic resin. In the core, at a joint of the sheet, the face direction of the end face of one sheet is oblique to the face direction of the surface, and the end face of the sheet 1 is parallel to the end face of another sheet opposite thereto. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は情報技術分野で用いられる機能性フィルム等の高機能性フィルムの巻き取りに使用される巻芯に関する。   The present invention relates to a winding core used for winding a highly functional film such as a functional film used in the field of information technology.

近年、情報技術分野の発展により、液晶用フィルム、エックス線用フィルム、プリント基盤用フィルム及びその銅箔ラミネートフィルム、更には高性能印画紙等が情報機器用フィルムとして多用されるようになってきた。通常、これらのフィルムはその生産や加工の工程において円筒状のコアと呼ばれる紙管に巻き取られる。   In recent years, with the development of the information technology field, films for liquid crystals, films for X-rays, films for printed boards and their copper foil laminate films, and high-performance photographic paper have come to be frequently used as films for information equipment. Usually, these films are wound around a paper tube called a cylindrical core in the production and processing steps.

巻き取られたこれらフィルムは、詳細にみると、最内層においてフィルム厚さに影響を受け、「乗り上げ段差」による歪みを生ずる。即ち、最内層の１層目を巻き回し、２層目にかかると、フィルムの長手方向終端に２層目が乗り上げることになり、２層目の乗り上げた部分のフィルムの本来の平面性が損なわれ、結果としてフィルムに内部歪みや凹凸を端面段差痕として生じ、表面の平面性や精緻さを要求されるその後の工程において使用できないという問題を引き起こしている。この内部歪みや凹凸は巻き取り後のフィルムが一時的ストックや流通等のため長時間留置されると特に発生しやすい。   In detail, these wound films are affected by the film thickness in the innermost layer, and are distorted due to “step-up steps”. That is, when the first layer of the innermost layer is wound and applied to the second layer, the second layer rides on the longitudinal end of the film, and the original flatness of the film on the second layer is impaired. As a result, internal distortion and unevenness are generated in the film as end face step marks, causing a problem that the film cannot be used in subsequent processes requiring surface flatness and precision. This internal distortion and unevenness are particularly likely to occur when the wound film is left for a long time due to temporary stock or distribution.

この歪み欠点は、巻き回しを重ねることにより更に外層へと波及し、同様の欠点を伝播して生じせしめる。又、この歪み欠点は巻き取り後のフィルムが一時的ストックや流通等のため長時間留置されると特に発生しやすい。   This distortion defect spreads further to the outer layer by overlapping windings, and the same defect is propagated and caused. This distortion defect is particularly likely to occur when the film after winding is left for a long time due to temporary stock or distribution.

これらの部分欠点は、使用される段階で切除されて捨てられることとなり、高価な原材料を無駄にし、コストアップの原因となっていた。   These partial defects have been cut off and discarded at the stage of use, and expensive raw materials have been wasted, leading to increased costs.

このような状況に対して、ロール状記録紙用紙管の分野では、０．２ｍｍ以上などの非常に厚い画像印刷用の記録紙の巻芯部に発生する端部段差を解消するために、紙管の外周に緩衝層として発泡スチレンシートを巻き付けたり、巻芯にスリットを設けたりしている（例えば、特許文献１参照。）。   In order to solve this situation, in the field of rolled recording paper tube, in order to eliminate the end step generated in the core of recording paper for very thick image printing such as 0.2 mm or more, A foamed styrene sheet is wound around the outer periphery of the tube as a buffer layer, or a slit is provided in the core (for example, see Patent Document 1).

しかし、特に、液晶用フィルム、エックス線用フィルム、高性能印画紙等の光学的な均一性が要求される情報機器分野の光学的用途のフィルムにおいては、プリント基盤用フィルム及びその銅箔ラミネートフィルムに比べて更に均一性が要求され、この歪み欠点は致命的である。   However, especially in films for optical applications in the field of information equipment where optical uniformity is required, such as liquid crystal films, X-ray films, high-performance photographic paper, etc. More uniformity is required, and this distortion defect is fatal.

又、巻き芯として紙管を使用し、紙管の表面に緩衝性を有する素材の層を形成したのではその紙管が発塵源となり塵埃を嫌う工程現場では使用できない。又、発泡紙も構成繊維が発塵源となり不適である。   Further, if a paper tube is used as a winding core and a layer of a material having a buffer property is formed on the surface of the paper tube, the paper tube becomes a source of dust generation and cannot be used in a process site where dust is disliked. Also, foamed paper is not suitable because the constituent fibers are a source of dust generation.

更に、緩衝層は柔らかい素材からできていて、繰り返しの使用でへたりやすく、又、巻芯の表面が汚れた場合汚れを拭き取りにくいので、巻芯の頻繁な更新が必要である。
特開２０００−３１８９３０号公報（第２〜６頁、第３図） Furthermore, since the buffer layer is made of a soft material, it is easy to sag after repeated use, and when the surface of the core becomes dirty, it is difficult to wipe off the dirt, so the core needs to be updated frequently.
JP 2000-318930 A (pages 2-6, FIG. 3)

本発明は、これら問題点に鑑み、巻芯部に端面段差痕を発生させず、かつ、緩衝層のへたりや汚れに迅速に低コストで対応できるフィルムの巻芯を提供しようとする。更に、低発塵性を備えた巻芯を提供しようとする。   In view of these problems, the present invention seeks to provide a film core that does not cause end surface step marks in the core portion and can quickly cope with sag and dirt on the buffer layer at low cost. Furthermore, an attempt is made to provide a core having low dust generation.

本発明の要旨とするところは、円筒体の表面に弾性層が設けられ、該弾性層が前記円筒体の表面の少なくとも一部に配された粘着剤層を介して接着剥離自在に接着されたフィルム用巻芯であることにある。   The gist of the present invention is that an elastic layer is provided on the surface of the cylindrical body, and the elastic layer is adhered and peeled off through an adhesive layer disposed on at least a part of the surface of the cylindrical body. It is to be a film core.

前記円筒体は、樹脂製又は金属製であり得る。   The cylindrical body may be made of resin or metal.

前記弾性層は、独立気泡を有し主成分がポリエチレン及びポリプロピレンから選択される発泡樹脂を含み得る。   The elastic layer may include a foamed resin having closed cells and a main component selected from polyethylene and polypropylene.

前記発泡樹脂の見かけ密度は、０．０３〜０．２ｇｒ／ｃｍ３であり得、前記シートの厚みは０．１〜２ｍｍであり得る。   The apparent density of the foamed resin may be 0.03 to 0.2 gr / cm3, and the thickness of the sheet may be 0.1 to 2 mm.

前記巻芯においては、前記円筒体に前記弾性層を構成する発泡樹脂又は弾性樹脂を含んで成るシートが巻き回され得、該シートが前記表面の少なくとも一部に両面接着テープを介して接着され得る。   In the winding core, a sheet comprising foamed resin or elastic resin constituting the elastic layer can be wound around the cylindrical body, and the sheet is bonded to at least a part of the surface via a double-sided adhesive tape. obtain.

前記両面粘着テープは、前記円筒体の両端部周面に貼着され得る。   The double-sided pressure-sensitive adhesive tape can be attached to the peripheral surfaces of both ends of the cylindrical body.

前記巻芯においては、前記円筒体に前記弾性層を構成する発泡樹脂又は弾性樹脂を含んで成るシートが巻き回され得、該シートが剥離性粘着剤層を備え得る。   In the winding core, a sheet including foamed resin or elastic resin constituting the elastic layer can be wound around the cylindrical body, and the sheet can include a peelable pressure-sensitive adhesive layer.

前記弾性層には補強用フィルムが積層され得る。   A reinforcing film may be laminated on the elastic layer.

前記巻芯においては、前記円筒体に前記弾性層を構成する発泡樹脂又は弾性樹脂を含んで成るシートが巻き回され得、該シートの継ぎ目において、１のシートの端面の面方向と前記表面の面方向とが斜交し、かつ該１のシートの端面に対向の他のシートの端面とが平行であり得る。   In the winding core, a sheet containing foamed resin or elastic resin constituting the elastic layer can be wound around the cylindrical body, and at the joint of the sheet, the surface direction of the end surface of one sheet and the surface The surface direction may be oblique and the end surface of the other sheet facing the end surface of the one sheet may be parallel.

前記シートの継ぎ目は、前記表面に沿った螺旋状であり得る。   The seam of the sheet may be spiral along the surface.

前記シートの継ぎ目は、前記円筒体の軸方向に平行であり得る。   The seam of the sheet may be parallel to the axial direction of the cylindrical body.

又、本発明の要旨とするところは、円筒体、発泡樹脂又は弾性樹脂を含んで成り該円筒体の表面に巻き回されることとなるシート、及び両面粘着テープを準備する工程と、
該表面の、該表面に貼合された状態の前記シートの縁同士が隣接する位置の少なくとも一部を含む領域に、前記両面粘着テープを貼着する工程と、
貼着された前記両面粘着テープを介して前記シートを前記表面に貼合する工程と
を含む巻芯の製造方法であることにある。 Further, the gist of the present invention is a step of preparing a cylindrical body, a foamed resin or an elastic resin, a sheet to be wound around the surface of the cylindrical body, and a double-sided adhesive tape;
A step of adhering the double-sided pressure-sensitive adhesive tape to a region including at least a part of a position where edges of the sheet in the state of being bonded to the surface are adjacent to each other;
And a step of bonding the sheet to the surface via the bonded double-sided pressure-sensitive adhesive tape.

更に、本発明の要旨とするところは、被巻き取りシートを巻き取る巻芯の使用方法であって、
円筒体と、発泡樹脂又は弾性樹脂を含んで成り該円筒体の表面に巻き回されることとなり片面に剥離性粘着剤層が設けられたシートとを準備する工程、
前記シートを前記表面に貼合して巻芯を得る工程、
該巻芯に被巻き取りシートを巻き取る工程、
該巻芯から該被巻き取りシートを巻き出して除去する工程、
該巻芯から前記シートを剥離して除去する工程、
新しい前記シートを前記円筒体の表面に貼合する工程、
を含む巻芯の使用方法であることにある。 Further, the gist of the present invention is a method of using a winding core for winding a wound sheet,
A step of preparing a cylindrical body and a sheet comprising a foamed resin or an elastic resin and wound around the surface of the cylindrical body and provided with a peelable adhesive layer on one side;
Bonding the sheet to the surface to obtain a core;
A step of winding the sheet to be wound around the core;
Unwinding and removing the wound sheet from the core;
Peeling and removing the sheet from the core;
Bonding the new sheet to the surface of the cylindrical body;
It is that it is the usage method of the winding core containing.

更に又、本発明の要旨とするところは、被巻き取りシートを巻芯に巻き取る方法であって、
前記巻芯を準備する工程、
前記１のシートの端面に沿った前記シートの端縁と前記円筒体の表面との間に前記被巻き取りシートの巻き始めの端縁部を挿入する工程、
前記被巻き取りシートの前記巻芯への巻き取りを開始する工程、
を含む巻き取り方法であることにある。 Furthermore, the gist of the present invention is a method of winding a wound sheet around a winding core,
Preparing the core,
Inserting a winding start edge portion of the sheet to be wound between the edge of the sheet and the surface of the cylindrical body along the end surface of the one sheet;
Starting the winding of the wound sheet to the core;
Is a winding method including

又更に、本発明の要旨とするところは、被巻き取りシートを巻芯に巻き取る方法であって、
前記巻芯を準備する工程、
前記被巻き取りシートの巻き始めの端縁部の片面に粘着層を形成する工程、
前記端縁部を、前記継ぎ目をまたいで前記シートの表面に粘着層を介して接合する工程、
前記被巻き取りシートの前記巻芯への巻き取りを開始する工程、
を含む巻き取り方法であることにある。 Still further, the gist of the present invention is a method of winding a wound sheet around a core,
Preparing the core,
Forming an adhesive layer on one side of the edge of the winding start of the wound sheet,
Bonding the edge to the surface of the sheet across the seam via an adhesive layer;
Starting the winding of the wound sheet to the core;
Is a winding method including

本発明の巻芯は、フィルム、又特には情報機器分野の光学的用途のフィルムの巻芯として使用され巻芯部にを端面段差痕をほとんど発生させず、工程歩留まりを向上させる。   The core of the present invention is used as a core of a film or, in particular, a film for optical applications in the field of information equipment, and hardly generates end face step marks on the core, thereby improving the process yield.

本発明の巻芯は、表層の緩衝用のシートの交換が容易であるため、手間をかけずに永続的に巻芯をへたりや汚れのない正常な状態で使用できる。   The core of the present invention can be used in a normal state where the core is not permanently tucked or soiled without trouble, since it is easy to replace the surface cushioning sheet.

本発明により、フィルムの巻芯の表層の緩衝用のシートの交換が容易となる。   According to the present invention, the buffer sheet on the surface layer of the film core can be easily replaced.

本発明の巻芯は巻き取り作動時の発塵がほとんどなく、塵埃のコンタミネーションを極度に嫌う情報機器分野の光学的用途のフィルムの巻芯として好適である。   The core of the present invention hardly generates dust during the winding operation, and is suitable as a film core for optical applications in the field of information equipment, which extremely dislikes dust contamination.

本発明に係る態様を詳しく説明する。本発明の巻芯は円筒体の表面に緩衝層としての弾性層が設けられて成る。弾性層は、例えば、ゴムシートのような弾性を有するシートや発泡樹脂シートを円筒体の表面に螺旋状に巻き付けて接着固定することにより形成される。   The aspect which concerns on this invention is demonstrated in detail. The core of the present invention is formed by providing an elastic layer as a buffer layer on the surface of a cylindrical body. The elastic layer is formed by, for example, spirally winding a sheet having elasticity such as a rubber sheet or a foamed resin sheet around the surface of the cylindrical body, and fixing the same.

弾性層が樹脂発泡樹脂シートから成る場合、この樹脂発泡体は、歪み２５％における圧縮応力（ＪＩＳ Ｋ６７６７に準じて測定）が３０〜２５０ｋPａであることが好適な緩衝効果が得られ端面段差痕の発生が防止できて好ましい。この圧縮応力の値がこの範囲を下まわるとフィルム端の段差を吸収できず、この範囲を上まわると緩衝効果が得られない。   When the elastic layer is made of a resin foam resin sheet, the resin foam has a compressive stress (measured according to JIS K6767) at a strain of 25% of 30 to 250 kPa. Generation | occurrence | production can be prevented and it is preferable. If the value of this compressive stress falls below this range, the level difference at the film end cannot be absorbed, and if it exceeds this range, a buffering effect cannot be obtained.

樹脂発泡体の発泡率は８〜２０倍であることが適切な前述の圧縮応力の範囲の値が得られて好ましい。発泡体の見かけ密度は０．０３〜０．２５ｇｒ／ｃｍ３であることが好ましい。   It is preferable that the foaming rate of the resin foam is 8 to 20 times because a value in the above-described range of compressive stress is obtained. The apparent density of the foam is preferably 0.03 to 0.25 gr / cm 3.

又、弾性層の厚みは０．１〜３ｍｍであることが好ましい。弾性層が樹脂発泡樹脂シートから成る場合、弾性層の厚みは０．１〜２．５ｍｍであることが更に好ましい。この発泡体の見かけ密度が０．０３〜０．２ｇｒ／ｃｍ３でありかつこの発泡樹脂シートの厚みが０．１〜２ｍｍであることが端面段差痕の発生を抑制するうえで最も好ましい。情報機器分野の光学的用途のフィルムは端面段差痕が付き易く、かつ、寸法上は微細な段差であっても光学的には目立ちやすく製品の性能にも大きく影響するので、この見かけ密度と厚みの範囲を同時に満足する範囲が好ましい。厚みが増すと巻き付け時に弾性層にシワが入りこのシワによる圧痕がフィルムに発生する場合がある。   Moreover, it is preferable that the thickness of an elastic layer is 0.1-3 mm. When the elastic layer is made of a resin foam resin sheet, the thickness of the elastic layer is more preferably 0.1 to 2.5 mm. The apparent density of the foam is 0.03 to 0.2 gr / cm 3 and the thickness of the foamed resin sheet is most preferably 0.1 to 2 mm from the viewpoint of suppressing the occurrence of end surface step marks. Films for optical applications in the field of information equipment tend to have end-face step marks, and even if they are small in size, they are optically conspicuous and greatly affect product performance. A range that simultaneously satisfies the above range is preferred. When the thickness is increased, wrinkles may enter the elastic layer during winding, and indentations due to the wrinkles may occur in the film.

発泡体を構成する樹脂は特に限定されないが、ポリエチレン系やポリプロピレン系の樹脂が挙げられる。又、発泡体は独立気泡を有することが弾性回復に優れ繰り返しの使用に耐え好ましい。   The resin constituting the foam is not particularly limited, and examples thereof include polyethylene-based and polypropylene-based resins. Further, it is preferable that the foam has closed cells because it is excellent in elastic recovery and can withstand repeated use.

独立気泡を有する発泡体は例えばポリエチレン系やポリプロピレン系の樹脂を電子線や薬剤により架橋させた後発泡させることにより得られる。   A foam having closed cells can be obtained by, for example, cross-linking a polyethylene-based or polypropylene-based resin with an electron beam or a chemical agent and then foaming.

弾性層が弾性樹脂シートから成る場合、この弾性樹脂シートの素材としては、ゴム、合成ゴム等のエラストマーが挙げられる。フェルトや不織布から成るものであってもよい。繊維とエラストマーとが重畳又は複合された弾性樹脂シートであってもよい。   When the elastic layer is made of an elastic resin sheet, examples of the material of the elastic resin sheet include elastomers such as rubber and synthetic rubber. It may be made of felt or non-woven fabric. It may be an elastic resin sheet in which fibers and an elastomer are superimposed or combined.

円筒体の内径は通常３インチ（略７６ｍｍ）、６インチ（略１５２ｍｍ）等のものがあるが、これに限定されない。円筒体の肉厚は３〜１５ｍｍの範囲であるがこれに限定されない。これらは巻き取る製品の量、巻き取り張力等の巻き取り条件により適宜選択される。   The inner diameter of the cylindrical body is usually 3 inches (approximately 76 mm), 6 inches (approximately 152 mm), but is not limited thereto. The thickness of the cylindrical body is in the range of 3 to 15 mm, but is not limited thereto. These are appropriately selected according to the winding conditions such as the amount of the product to be wound and the winding tension.

円筒体は紙管であってもよいが、ＡＢＳ（アクリル−ブタジエン−スチレン樹脂）、塩ビ系樹脂、エステル系樹脂、ポリカボネート、ポリアミド系樹脂、スチレン系樹脂等の樹脂やこれらの樹脂を成分とする複合材から成ることが好ましい。樹脂を主成分とする円筒体は、使用時の発塵が紙管に比べてはるかに少なく好ましい。更に、樹脂を主成分とする円筒体は吸湿、脱湿による径の変化が紙管に比べて少なく、巻き取られた情報機器分野の光学的用途のフィルムが、円筒体の吸湿による膨張で圧縮されて、フィルムの端部に起因する段差により生ずる前述の歪み欠点が助長される度合いがはるかに少なく、好ましい。この現象は、プリント基盤用フィルム及びその銅箔ラミネートフィルムような電子回路機器用フィルムの場合は欠点として顕在化しないものである。   The cylindrical body may be a paper tube, but a resin such as ABS (acryl-butadiene-styrene resin), vinyl chloride resin, ester resin, polycarbonate, polyamide resin, styrene resin or the like is used as a component. It is preferably made of a composite material. A cylindrical body mainly composed of a resin is preferable because it generates much less dust during use than a paper tube. In addition, the cylindrical body mainly composed of resin has less change in diameter due to moisture absorption and dehumidification than the paper tube, and the wound film for optical applications in the field of information equipment is compressed by expansion due to moisture absorption of the cylinder. Thus, the above-mentioned distortion defect caused by the step caused by the edge of the film is much less favored, which is preferable. This phenomenon does not manifest itself as a drawback in the case of a film for an electronic circuit device such as a film for a printed circuit board and its copper foil laminate film.

円筒体は、アルミ、鉄、銅、チタンあるいはこれらの金属の少なくとも１種を含む合金や、これらを成分とする部材を含む複合構造材から成るものであってもよい。この場合も、樹脂と同様に低発塵性であり、吸湿、脱湿による径の変化が紙管に比べて少なく好ましい。   The cylindrical body may be made of aluminum, iron, copper, titanium, an alloy including at least one of these metals, or a composite structure material including a member containing these as components. In this case as well as the resin, it has a low dust generation property, and the change in diameter due to moisture absorption and dehumidification is less than that of the paper tube, which is preferable.

吸湿による径の変化は、３０℃２０％RHの雰囲気に４８時間留置された円筒体の外径をR１とし、その後３０℃９０％RHの雰囲気に４８時間留置された円筒体の外径をR２とし、（（R１−R２）／R１）×１００（％）で表示される。円筒体の吸湿による径の変化は０．５％以下であることが好ましい。紙管はこの変化が１％以上であり好ましくない。   The change in diameter due to moisture absorption is defined as the outer diameter of a cylinder placed in an atmosphere of 30 ° C. and 20% RH for 48 hours as R1, and then the outer diameter of the cylinder placed in an atmosphere of 30 ° C. and 90% RH for 48 hours as R2. And ((R1-R2) / R1) × 100 (%). The change in diameter due to moisture absorption of the cylindrical body is preferably 0.5% or less. The paper tube is not preferable because this change is 1% or more.

又、情報機器分野の光学的用途のフィルムは端面段差痕が付き易く、かつ、寸法上は微細な段差であっても光学的には目立ちやすく製品の性能にも大きく影響するので、通常の工程では製品歩留まりを所定の水準に維持するのに細心の注意と多大の労力を要したが、劣化した弾性樹脂シートや発泡樹脂シートを速やかに交換することにより、手間とコストをさほど要せずに製品歩留まりが向上できることがわかった。   In addition, film for optical applications in the field of information equipment tends to have end face step marks, and even if it is a fine step, it is easily noticeable optically and greatly affects the performance of the product. In order to maintain the product yield at a predetermined level, great care and great effort were required, but by replacing the deteriorated elastic resin sheet and foamed resin sheet quickly, less labor and cost were required. It was found that the product yield can be improved.

この交換を容易にするためには、弾性樹脂シートや発泡樹脂シートと円筒体の表面との接着が、接着剥離自在になされることが好ましい。このため、この接着は粘着剤を介してなされることが好ましい。通常の硬化して接着力を生ずる、例えばエマルジョンタイプ、溶剤タイプ、化学反応による硬化タイプの接着剤は、剥離に際して円筒体の表面から粘着剤が容易には除去されず別の弾性樹脂シートや発泡樹脂シートを貼着する際にその部分が凹凸となり好ましくない。粘着剤を用いることにより、弾性樹脂シート発泡樹脂シートと円筒体の表面との接着が接着剥離自在になされる。弾性樹脂シートや発泡樹脂シートと円筒体の表面との接着が接着剥離自在になされると、使用によるへたりや汚れ等により性能や外観が劣化した弾性樹脂シートや発泡樹脂シートを剥離して容易に交換できる。   In order to facilitate this replacement, it is preferable that the elastic resin sheet or the foamed resin sheet and the surface of the cylindrical body be bonded and separated. For this reason, it is preferable that this adhesion is made via an adhesive. For example, emulsion type, solvent type, and chemical type curing type adhesives that generate adhesive force when cured normally do not easily remove the adhesive from the surface of the cylinder during peeling. When the resin sheet is stuck, the portion becomes uneven, which is not preferable. By using the pressure-sensitive adhesive, the adhesive between the elastic resin sheet and the foamed resin sheet and the surface of the cylindrical body can be freely separated. If the elastic resin sheet or foamed resin sheet is bonded to the surface of the cylindrical body, it is easy to peel off the elastic resin sheet or foamed resin sheet whose performance or appearance has deteriorated due to sag or dirt due to use. Can be replaced.

円筒体が樹脂又は金属から成る場合は、この剥離に際して円筒体の表面から粘着剤が除去されて、別の弾性樹脂シートや発泡樹脂シートを貼着する際にその部分が凹凸とならず好ましい。円筒体が紙管であると粘着剤が紙管の繊維組織の微細空隙に埋没しているので、この剥離に際して円筒体の表面から粘着剤が除去されず別の弾性樹脂シートや発泡樹脂シートを貼着する際にその部分が凹凸となり好ましくない。   When the cylindrical body is made of resin or metal, the pressure-sensitive adhesive is removed from the surface of the cylindrical body at the time of peeling, and the portion does not become uneven when sticking another elastic resin sheet or foamed resin sheet. When the cylindrical body is a paper tube, the adhesive is buried in the fine voids of the fiber structure of the paper tube, so that during this peeling, the adhesive is not removed from the surface of the cylindrical body and another elastic resin sheet or foamed resin sheet is used. When sticking, the portion becomes uneven, which is not preferable.

又、円筒体が樹脂又は金属から成る場合は、紙管に比べて一般には高価であり、使用により弾性樹脂シートや発泡樹脂シートの性能や外観が劣化した場合、このシートを剥離してシートのみを交換できることは資材コストの低減となる。   Also, when the cylindrical body is made of resin or metal, it is generally more expensive than a paper tube. If the performance or appearance of an elastic resin sheet or foamed resin sheet deteriorates due to use, this sheet is peeled off and only the sheet is removed. It is possible to reduce the material cost.

更に、発泡樹脂シートが独立気泡を有する場合は、発泡樹脂シートの表面が連続気泡を有する発泡体の表面と比べて平滑であり、円筒体から容易に剥離でき、発泡樹脂シートを交換する操作が容易となり好ましい。発泡樹脂シートがポリエチレンやポリプロピレンのような官能基を有しない樹脂から成る場合は、又更に円筒体から容易に剥離でき発泡樹脂シートを交換する操作が容易となり、好ましい。   Furthermore, when the foamed resin sheet has closed cells, the surface of the foamed resin sheet is smoother than the surface of the foamed body having open cells, and can be easily peeled off from the cylindrical body. It is easy and preferable. When the foamed resin sheet is made of a resin having no functional group such as polyethylene or polypropylene, it is preferable that the foamed resin sheet can be easily peeled off from the cylindrical body and the operation for replacing the foamed resin sheet becomes easy.

粘着剤は発泡樹脂シート及び／又は円筒体表面の少なくとも一部に塗布して用いることが出来る。あるいは、両面に粘着剤層が設けられた両面接着テープを介して弾性樹脂シートや発泡樹脂シートと円筒体表面とが接着されてもよい。予め両面接着テープを円筒体表面の少なくとも一部に貼着し、次いで所定の位置に弾性樹脂シートや発泡樹脂シートを配して貼合すると、貼合の位置を正確かつ確実にして貼合操作がなされ好ましい。   The pressure-sensitive adhesive can be used by being applied to at least a part of the surface of the foamed resin sheet and / or the cylindrical body. Alternatively, the elastic resin sheet or foamed resin sheet and the cylindrical surface may be bonded via a double-sided adhesive tape provided with an adhesive layer on both sides. Pre-stick double-sided adhesive tape to at least a part of the cylindrical surface, and then place and paste an elastic resin sheet or foamed resin sheet in place. Is preferred.

粘着剤としては、ゴム系、アクリル系、シリコーン系、ビニルエーテル系、ウレタン系などの粘弾性ポリマーに必要に応じてロジン系、石油樹脂系などの粘着付与樹脂、軟化剤、架橋剤などが配合されたものが挙げられる。   As the adhesive, rubber-based, acrylic-based, silicone-based, vinyl ether-based, urethane-based and other viscoelastic polymers are blended with rosin-based and petroleum resin-based tackifying resins, softeners, cross-linking agents, etc. as necessary. Can be mentioned.

本発明の巻芯の好ましい態様の一例を図１に示す。図１において、巻芯２は円筒体４の表面に弾性層６が設けられて成る。弾性層６は、発泡樹脂シート（又は弾性樹脂シート）８が円筒体４の表面に螺旋状に巻き付けて接着固定されて形成されている。発泡樹脂シート８と円筒体４とは、円筒体４の表面に螺旋状に巻き付けられた両面粘着テープ１０を介して接着されている。両面粘着テープ１０は、発泡樹脂シート８の縁同士の継ぎ目１２に沿って予め配され、両面粘着テープ１０が隣接の発泡樹脂シート８の長手方向の縁部に渡された状態で発泡樹脂シート８が両面粘着テープ１０により円筒体４に接着されている。   An example of a preferred embodiment of the core of the present invention is shown in FIG. In FIG. 1, the core 2 is formed by providing an elastic layer 6 on the surface of a cylindrical body 4. The elastic layer 6 is formed by a foamed resin sheet (or elastic resin sheet) 8 spirally wound around the surface of the cylindrical body 4 and bonded and fixed. The foamed resin sheet 8 and the cylindrical body 4 are bonded via a double-sided pressure-sensitive adhesive tape 10 that is spirally wound around the surface of the cylindrical body 4. The double-sided pressure-sensitive adhesive tape 10 is disposed in advance along the joint 12 between the edges of the foamed resin sheet 8, and the double-sided pressure-sensitive adhesive tape 10 is passed to the edge in the longitudinal direction of the adjacent foamed resin sheet 8. Is bonded to the cylindrical body 4 by the double-sided adhesive tape 10.

本発明の巻芯の好ましい態様の他の一例を図２に示す。図２において、巻芯２ａは円筒体４の表面に弾性層６が設けられて成る。弾性層６は、発泡樹脂シート（又は弾性樹脂シート）８が円筒体４の表面に螺旋状に巻き付けて接着固定されて形成されている。発泡樹脂シート８と円筒体４とは、円筒体４の両端部表面に環状に巻き付けられた両面粘着テープ１０ａを介して接着されている。両面粘着テープ１０ａは、円筒体４の表面に円筒体４の周縁に沿って予め配され、発泡樹脂シート８の円筒体４の周縁の位置に相当する部分が両面粘着テープ１０ａにより円筒体４に接着されている。   Another example of a preferred embodiment of the core of the present invention is shown in FIG. In FIG. 2, the core 2 a is formed by providing an elastic layer 6 on the surface of a cylindrical body 4. The elastic layer 6 is formed by a foamed resin sheet (or elastic resin sheet) 8 spirally wound around the surface of the cylindrical body 4 and bonded and fixed. The foamed resin sheet 8 and the cylindrical body 4 are bonded via a double-sided pressure-sensitive adhesive tape 10 a that is annularly wound around the surfaces of both ends of the cylindrical body 4. The double-sided adhesive tape 10a is previously arranged on the surface of the cylindrical body 4 along the periphery of the cylindrical body 4, and a portion corresponding to the position of the peripheral edge of the cylindrical body 4 of the foamed resin sheet 8 is formed on the cylindrical body 4 by the double-sided adhesive tape 10a. It is glued.

図１、図２に示す態様においては、弾性層６が円筒体４の表面の一部に両面接着テープを介して接着された層となっている。このように、発泡樹脂シート（又は弾性樹脂シート）８が、円筒体４の表面の一部分で接着されれば、弾性層６と円筒体４との結合は充分である。この態様は、弾性層６と円筒体４とが全面にわたって接着されたものに比べて弾性層６と円筒体４との分離が容易であり、弾性層６を新品と交換するときには有利である。   1 and 2, the elastic layer 6 is a layer bonded to a part of the surface of the cylindrical body 4 via a double-sided adhesive tape. Thus, if the foamed resin sheet (or elastic resin sheet) 8 is bonded to a part of the surface of the cylindrical body 4, the elastic layer 6 and the cylindrical body 4 are sufficiently bonded. In this aspect, the elastic layer 6 and the cylindrical body 4 can be easily separated from each other as compared with the case where the elastic layer 6 and the cylindrical body 4 are bonded over the entire surface, which is advantageous when the elastic layer 6 is replaced with a new one.

図２に示すような、両面粘着テープ１０ａが、円筒体４の表面に円筒体４の周縁に沿って配されて、発泡樹脂シート８と接着された態様は、少ない接着面積で確実に発泡樹脂シート８を円筒体４の表面に貼合することができ、好ましい。この態様は、円筒体４の表面と発泡樹脂シート８との接着面積が少ないので、発泡樹脂シート８の貼合操作、剥離操作が容易であり、両面粘着テープ１０ａの使用量が少なくて済む。又、両面粘着テープ１０ａの円筒体４への貼着の位置が周縁に沿っているので、貼着位置が特定しやすく貼着操作が容易である。   As shown in FIG. 2, the double-sided pressure-sensitive adhesive tape 10 a is arranged on the surface of the cylindrical body 4 along the periphery of the cylindrical body 4 and bonded to the foamed resin sheet 8. The sheet 8 can be bonded to the surface of the cylindrical body 4, which is preferable. In this aspect, since the bonding area between the surface of the cylindrical body 4 and the foamed resin sheet 8 is small, the operation of bonding and peeling the foamed resin sheet 8 is easy, and the amount of the double-sided pressure-sensitive adhesive tape 10a can be reduced. Moreover, since the position of sticking the double-sided pressure-sensitive adhesive tape 10a to the cylindrical body 4 is along the periphery, the sticking position is easy to specify and the sticking operation is easy.

本発明においては、発泡樹脂シート（又は弾性樹脂シート）は、継ぎ目が円筒体４の軸方向と平行になるように円筒体４に巻き付けられてもよい。即ち、長方形の発泡樹脂シート（又は弾性樹脂シート）を、そのシートの一辺を円筒体４の軸方向と平行にして円筒体４に巻き付けてもよい。しかし、例えば図１、図２に示すように、継ぎ目１２が円筒体４の表面に螺旋状に形成された態様は、巻かれたフィルムに継ぎ目の跡が付きにくく、好ましい。   In the present invention, the foamed resin sheet (or elastic resin sheet) may be wound around the cylindrical body 4 so that the joint is parallel to the axial direction of the cylindrical body 4. That is, a rectangular foamed resin sheet (or elastic resin sheet) may be wound around the cylindrical body 4 with one side of the sheet parallel to the axial direction of the cylindrical body 4. However, for example, as shown in FIGS. 1 and 2, a mode in which the seam 12 is formed in a spiral shape on the surface of the cylindrical body 4 is preferable because the wound film hardly has a mark on the seam.

又、本発明においては、弾性層６は１枚の発泡樹脂シート（又は弾性樹脂シート）から成るものであってもよいが、複数枚のシートを面方向に並べて配して成るものであってもよい。   In the present invention, the elastic layer 6 may be composed of a single foamed resin sheet (or elastic resin sheet), but is formed by arranging a plurality of sheets side by side in the surface direction. Also good.

このような両面粘着テープ１０を用いた貼着手順は、伸び易い発泡樹脂シート（又は弾性樹脂シート）８を貼着するときに、貼着操作によりその発泡樹脂シート（又は弾性樹脂シート）８が伸ばされたり所定の位置からずれて貼着された場合、直ちにその伸ばされた部分やずれた部分を剥がして貼りなおしができ、はじめからやり直したり不良品となったりせずに正確な貼着操作が短時間でなされ好ましい。   The sticking procedure using such a double-sided pressure-sensitive adhesive tape 10 is that when the foamed resin sheet (or elastic resin sheet) 8 that is easy to stretch is attached, the foamed resin sheet (or elastic resin sheet) 8 is attached by the sticking operation. When it is stretched or attached with a deviation from the specified position, the stretched part or the displaced part can be immediately peeled off and re-applied. Is preferable in a short time.

本発明においては、弾性樹脂シートや発泡樹脂シートと円筒体とが相対する面全体にわたって接着されていてもよいが、例えば図1に示すように、弾性樹脂シートや発泡樹脂シートが円筒体に巻き回されて発泡樹脂シートの縁同士の継ぎ目となる部分のみで接着されていることが。接着操作、剥離操作の容易さのうえで好ましい。   In the present invention, the elastic resin sheet or the foamed resin sheet and the cylindrical body may be bonded over the entire opposing surface. For example, as shown in FIG. 1, the elastic resin sheet or the foamed resin sheet is wound around the cylindrical body. It must be bonded only at the part that is turned and becomes the joint between the edges of the foamed resin sheet. It is preferable in view of ease of bonding operation and peeling operation.

なお、図３に示すように、端面１６ａ、端面１６ｂがシートの面方向に対して直角をなすように形成された発泡樹脂シート８を用いて点線で示された状態でつき合わされて、発泡樹脂シート８の表面１８への貼合がなされると、継ぎ目１２の部分で端面１６ａと端面１６ｂとがV字状をなして弾性層６の表面にV字状の溝ができてしまうことがある。この現象は、継ぎ目１２の部分で発泡樹脂シート８と表面１８が接着されている場合にも生ずる。   In addition, as shown in FIG. 3, the end surface 16a and the end surface 16b are joined together in the state shown with the dotted line using the foamed resin sheet 8 formed so as to make a right angle with respect to the surface direction of the sheet. When the sheet 8 is bonded to the surface 18, the end surface 16 a and the end surface 16 b may be V-shaped at the joint 12, and a V-shaped groove may be formed on the surface of the elastic layer 6. . This phenomenon also occurs when the foamed resin sheet 8 and the surface 18 are bonded at the joint 12.

このV字状の溝の発生を防止する対策として、図４に示す態様が挙げられる。図４に図２の継ぎ目１２の部分のＡ−Ａ方向の要部端面図を示す。継ぎ目１２の部分、即ち、発泡樹脂シート８の１の縁１４ａと、１の縁１４ａに相対の他の縁１４ｂが円筒体４の表面１８の面方向に隣接する位置において、１の縁１４ａの発泡樹脂シート８の端面１６ａと表面１８とのなす角αが鋭角であり、端面１６ａの向きと表面１８の向きとが斜交し、かつ端面１６ａと、他の縁１４ｂの発泡樹脂シート８の端面１６ｂとが互いに平行になって対向している。このような構成により、継ぎ目１２の部分で端面１６ａと端面１６ｂとがV字状をなして弾性層６の表面にV字状の溝ができてしまう図３に示す現象を防止できる。   As a measure for preventing the occurrence of the V-shaped groove, an embodiment shown in FIG. FIG. 4 shows an end view of the main part in the AA direction of the joint 12 in FIG. A portion of the joint 12, that is, one edge 14 a of the foamed resin sheet 8 and another edge 14 b relative to the one edge 14 a are adjacent to each other in the surface direction of the surface 18 of the cylindrical body 4. The angle α formed by the end surface 16a of the foamed resin sheet 8 and the surface 18 is an acute angle, the direction of the end surface 16a and the direction of the surface 18 are oblique, and the end surface 16a and the other edge 14b of the foamed resin sheet 8 of the other edge 14b. The end surface 16b faces each other in parallel. With such a configuration, it is possible to prevent the phenomenon shown in FIG. 3 in which the end face 16a and the end face 16b are V-shaped at the joint 12 and a V-shaped groove is formed on the surface of the elastic layer 6.

本発明の更に他の態様においては、図５に示すように、発泡樹脂シート８が片面に再剥離性粘着剤層２０を備える。この再剥離性粘着剤層付き発泡樹脂シート２２を図６に示すように、円筒体４の表面に螺旋状に巻き付けて再剥離性粘着剤層２０を介して円筒体４の表面に貼着することにより、本発明の巻芯２ｂが得られる。巻芯２ｂは、フィルムのような被巻取りシートの巻き取りと巻き出しに使用された後、汚れや圧痕の生じた再剥離性粘着剤層付き発泡樹脂シート２２を剥がして、新しい再剥離性粘着剤層付き発泡樹脂シート（２２）を円筒体４の表面に貼着して再使用出来る。   In still another aspect of the present invention, as shown in FIG. 5, the foamed resin sheet 8 includes a removable pressure-sensitive adhesive layer 20 on one side. As shown in FIG. 6, the foamed resin sheet 22 with the releasable pressure-sensitive adhesive layer is spirally wound around the surface of the cylindrical body 4 and attached to the surface of the cylindrical body 4 through the removable pressure-sensitive adhesive layer 20. As a result, the core 2b of the present invention is obtained. The core 2b is used for winding and unwinding a sheet to be wound such as a film, and then peeled off the foamed resin sheet 22 with a releasable pressure-sensitive adhesive layer in which dirt or indentation has occurred, thereby providing a new removability. The foamed resin sheet (22) with an adhesive layer can be adhered to the surface of the cylindrical body 4 and reused.

例えば、フィルムの生産工場で巻芯２ｂにフィルムを巻き取って使用先に出荷し、使用先でフィルムが巻き出された巻芯２ｂを生産工場に返送し、返送された巻芯２ｂから再剥離性粘着剤層付き発泡樹脂シート２２を剥がして新しい再剥離性粘着剤層付き発泡樹脂シート（２２）を円筒体４の表面に貼着して再使用することが出来る。このように、巻芯２ｂは円筒体４のリサイクル使用が可能である。   For example, the film is wound around the core 2b at the film production factory, shipped to the user, the core 2b from which the film has been unwound is returned to the production factory, and the peeled core 2b is peeled off again. The foamed resin sheet 22 with a releasable pressure-sensitive adhesive layer can be peeled off and a new foamed resin sheet (22) with a releasable pressure-sensitive adhesive layer can be attached to the surface of the cylindrical body 4 and reused. In this way, the core 2b can be recycled from the cylindrical body 4.

なお、再剥離性粘着剤層付き発泡樹脂シート２２の端面同士が相対する継ぎ目１２ｂにおいて、第４図に示す態様と同様に、対向の両端面の向きがいずれも斜交し、かつ互いに平行になっていてもよい。   Incidentally, in the joint 12b where the end faces of the foamed resin sheet 22 with the releasable pressure-sensitive adhesive layer face each other, as in the embodiment shown in FIG. 4, the directions of the opposite end faces are both oblique and parallel to each other. It may be.

図６に示す態様においては、再剥離性粘着剤層付き発泡樹脂シートのかわりに、片面に再剥離性粘着剤層を備える弾性樹脂シートが用いられてもよい。   In the embodiment shown in FIG. 6, an elastic resin sheet having a removable pressure-sensitive adhesive layer on one side may be used instead of the foamed resin sheet with a removable pressure-sensitive adhesive layer.

再剥離性粘着剤としては、例えば、アクリル樹脂系粘着剤、ウレタン樹脂系粘着剤、ゴム系粘着剤、シリコーン系粘着剤などが挙げられる。アクリル樹脂系粘着剤の具体例としては、アクリル酸、アクリル酸メチル、アクリル酸エチル、アクリル酸プロピル、アクリル酸ブチル、アクリル酸−２−エチルヘキシル、メタクリル酸エチル、メタクリル酸ブチル、アクリロニトリルなどの単独重合体もしくは共重合体などが挙げられる。合成ゴム系粘着剤の具体例としては、スチレン−ブタジエンゴム、ポリイソブチレンゴム、イソブチレン−イソプレンゴム、イソプレンゴム、スチレン−イソプレンブロック共重合体、スチレン−ブタジエンブロック共重合体、スチレン−エチレン−ブチレンブロック共重合体、エチレン−酢酸ビニル熱可塑性エラストマーなどが挙げられる。これらの粘着剤は、１種単独でまたは２種以上を組み合わせて用いることができる。   Examples of the releasable pressure-sensitive adhesive include acrylic resin-based pressure-sensitive adhesives, urethane resin-based pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives. Specific examples of acrylic resin-based adhesives include single weights such as acrylic acid, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, ethyl methacrylate, butyl methacrylate, and acrylonitrile. Examples thereof include a polymer or a copolymer. Specific examples of the synthetic rubber pressure-sensitive adhesive include styrene-butadiene rubber, polyisobutylene rubber, isobutylene-isoprene rubber, isoprene rubber, styrene-isoprene block copolymer, styrene-butadiene block copolymer, styrene-ethylene-butylene block. Examples thereof include copolymers and ethylene-vinyl acetate thermoplastic elastomers. These pressure-sensitive adhesives can be used alone or in combination of two or more.

また、再剥離性粘着剤は、シリカ、タルク、クレー、酸化チタン、酸化アルミニウム、炭酸カルシウムなどの隠蔽性を向上させる填料を含むことができる。また、再剥離性粘着剤には、さらに必要に応じて粘着付与剤、軟化剤、老化防止剤などを配合することができる。粘着付与剤としては、ロジン系樹脂、テルペンフェノール樹脂、テルペン樹脂、芳香族炭化水素変性テルペン樹脂、石油樹脂、クマロン・インデン樹脂、スチレン系樹脂、フェノール系樹脂、キシレン樹脂などが挙げられる。軟化剤としては、プロセスオイル、液状ゴム、可塑剤などが挙げられる。再剥離性粘着剤は、染料又は顔料等の着色剤を含んでもよい。   Further, the removable pressure-sensitive adhesive can contain a filler for improving the concealability such as silica, talc, clay, titanium oxide, aluminum oxide, calcium carbonate. Moreover, a tackifier, a softening agent, an antiaging agent, etc. can be further mix | blended with a removable adhesive as needed. Examples of the tackifier include rosin resin, terpene phenol resin, terpene resin, aromatic hydrocarbon-modified terpene resin, petroleum resin, coumarone / indene resin, styrene resin, phenol resin, xylene resin and the like. Examples of the softener include process oil, liquid rubber, and plasticizer. The releasable pressure-sensitive adhesive may contain a colorant such as a dye or a pigment.

再剥離性粘着剤層２０は、種々の方法で形成でき、例えば、再剥離性粘着剤又はその前駆体をエアーナイフコーター、ブレードコーター、バーコーター、グラビアコーター、ロールコーター、カーテンコーター、ダイコーター、ナイフコーター、スクリーンコーター、マイヤーバーコーター、キスコーターなどで塗布し乾燥又は加熱する方法等が挙げられる。   The re-peelable pressure-sensitive adhesive layer 20 can be formed by various methods, for example, a re-peelable pressure-sensitive adhesive or a precursor thereof is an air knife coater, blade coater, bar coater, gravure coater, roll coater, curtain coater, die coater, Examples thereof include a method of applying with a knife coater, screen coater, Meyer bar coater, kiss coater, etc. and drying or heating.

巻芯２ｂに用いる円筒体４の表面には、再剥離性粘着剤層付き発泡樹脂シート２２の剥離を容易にするために剥離層が設けられてもよい。剥離層を形成する樹脂としては、シリコン系樹脂、弗素系樹脂、ポリエステル系樹脂等が挙げられる。   A release layer may be provided on the surface of the cylindrical body 4 used for the core 2b in order to facilitate the release of the foamed resin sheet 22 with the releasable pressure-sensitive adhesive layer. Examples of the resin for forming the release layer include silicon resins, fluorine resins, and polyester resins.

又、発泡樹脂シート（又は弾性樹脂シート）が、継ぎ目１２ａが円筒体４の軸方向と平行になるように円筒体４に巻き付けられる態様においては、図７に示す巻芯２ｃのように、長さが円筒体４の周長と等しく、幅が円筒体４の長さと等しい方形の発泡樹脂シート８ａを円筒体４に巻きまわしてもよい。あるいは、図８に示す巻芯２ｄのようにように、長さが円筒体４の周長と等しい平行四辺形の発泡樹脂シート８ｂが，継ぎ目１２ｂが円筒体４の軸方向と僅かに斜向するように円筒体４に巻き付けられる態様であってもよい。   Further, in the aspect in which the foamed resin sheet (or elastic resin sheet) is wound around the cylindrical body 4 so that the joint 12a is parallel to the axial direction of the cylindrical body 4, a long core as shown in FIG. A rectangular foamed resin sheet 8 a having a length equal to the circumferential length of the cylindrical body 4 and a width equal to the length of the cylindrical body 4 may be wound around the cylindrical body 4. Alternatively, as in the case of the core 2d shown in FIG. 8, the parallelogram foamed resin sheet 8b whose length is equal to the circumferential length of the cylinder 4 is slightly inclined with respect to the axial direction of the cylinder 4. The aspect wound around the cylindrical body 4 may be used.

このような態様においては、図９に示すように、予め発泡樹脂シート８ａの裏面に粘着剤層２０が形成されている粘着剤層付き発泡樹脂シート２２が用いられてもよい。大径、長尺の巻芯の場合はこのような粘着剤層付き発泡樹脂シート２２を用いて巻芯２ｃを製造することが巻き付け操作が容易であり、巻芯２ｃの搬送などの取り扱い中に発泡樹脂シート８ａが剥がれるトラブルがなく好ましい。粘着剤層は再剥離性粘着剤層であることが好ましい。   In such an aspect, as shown in FIG. 9, the foamed resin sheet 22 with the adhesive layer by which the adhesive layer 20 was previously formed in the back surface of the foamed resin sheet 8a may be used. In the case of a large-diameter and long core, it is easy to wind the core 2c by using the foamed resin sheet 22 with the pressure-sensitive adhesive layer. During handling such as transport of the core 2c. There is no trouble that the foamed resin sheet 8a is peeled off, which is preferable. The pressure-sensitive adhesive layer is preferably a removable pressure-sensitive adhesive layer.

粘着剤層付き発泡樹脂シート２２は、図１０に示すように、離型祇等の離型シート２４が粘着剤層側に貼着されてストックされることが好ましい。このような離型シート・粘着剤層付き発泡樹脂シート３０は円筒体４の表面に貼合されるまでの取り扱いが容易であり好ましい。   As shown in FIG. 10, the foamed resin sheet 22 with the pressure-sensitive adhesive layer is preferably stocked with a release sheet 24 such as a mold release stick attached to the pressure-sensitive adhesive layer side. Such a release sheet / foamed resin sheet 30 with an adhesive layer is preferable because it is easy to handle until it is bonded to the surface of the cylindrical body 4.

更に、方形の発泡樹脂シート８ａが、継ぎ目１２ａが円筒体４の軸方向と平行になるように円筒体４に巻きまわされた態様においては、図１１に示すように、液晶用偏光フィルムのような被巻取りシート４０の巻き始めの端縁部３２を、発泡樹脂シート８ａの継ぎ目１２ａを構成する、発泡樹脂シートの縁部３４の下側、即ち縁部３４と円筒体４の表面との間に挿入し、縁部３４と端縁部３２とを縁部３４に形成されている粘着剤層２０を介して接合したのち被巻取りシート４０の巻き取りを開始することが好ましい。この接合操作は、予め円筒体４の表面に貼着されている縁部３４を、その縁部３４の長手方向に沿って剥がしたのち端縁部３２を縁部３４と円筒体４の表面との間に挿入して行なわれる。   Further, in a mode in which the rectangular foamed resin sheet 8a is wound around the cylindrical body 4 so that the joint 12a is parallel to the axial direction of the cylindrical body 4, as shown in FIG. The end edge 32 of the winding start of the sheet 40 to be wound is formed below the edge 34 of the foamed resin sheet constituting the joint 12a of the foamed resin sheet 8a, that is, between the edge 34 and the surface of the cylindrical body 4. It is preferable to start winding of the sheet 40 to be wound after inserting between the edge 34 and the end edge 32 via the adhesive layer 20 formed on the edge 34. In this joining operation, the edge 34 that has been bonded to the surface of the cylindrical body 4 in advance is peeled along the longitudinal direction of the edge 34, and then the end edge 32 is connected to the edge 34 and the surface of the cylindrical body 4. It is performed by inserting between.

あるいは、図１２に示すように、離型シート・粘着剤層付き発泡樹脂シート３０の縁部３４ａにおいて、離型シート２４に幅方向（縁部３４ａの長手方向）に沿って切れ目２７を形成しておき、斜交切断面３７に沿って発泡樹脂シート３０を切断して継ぎ目１２ａ（図１１）の斜交端面を形成した後、図１３に示すように、短冊状の離型シート２９を粘着剤層付き発泡樹脂シート２２に残したまま粘着剤層付き発泡樹脂シート２２を円筒体４の表面に貼合し、その後短冊状の離型シート２９を除去し、その短冊状の離型シート２９が除去された跡の部分の粘着剤層に縁部３４を貼着してもよい。これにより、縁部３４の端縁部３２への貼着操作が簡易化できる。   Alternatively, as shown in FIG. 12, at the edge 34a of the release sheet / foamed resin sheet 30 with the pressure-sensitive adhesive layer, a cut 27 is formed in the release sheet 24 along the width direction (longitudinal direction of the edge 34a). In addition, after the foamed resin sheet 30 is cut along the oblique cut surface 37 to form the oblique end surface of the joint 12a (FIG. 11), the strip-shaped release sheet 29 is adhered as shown in FIG. The foamed resin sheet 22 with the pressure-sensitive adhesive layer is bonded to the surface of the cylindrical body 4 while remaining on the foamed resin sheet 22 with the adhesive layer, and then the strip-shaped release sheet 29 is removed, and the strip-shaped release sheet 29 is removed. The edge 34 may be attached to the pressure-sensitive adhesive layer at the portion where the mark has been removed. Thereby, the sticking operation to the edge part 32 of the edge part 34 can be simplified.

又、この態様においては、図１４に示すように、縁部３４に接合された端縁部３２において、その接合面と反対の面が両面粘着テープような第２の粘着剤層４４を介して円筒体４の表面と接着されていてもよい。このような態様においては、予め、図１５に示すように、接合前の被巻取りシート４０の端縁部３２に両面粘着テープ等を用いて第２の粘着剤層４４を形成してから、端縁部３２を、縁部３４と円筒体４の表面との間に挿入して、次いで端縁部３２と円筒体４の表面とを第２の粘着剤層４４を介して接着することが好ましい。   Moreover, in this aspect, as shown in FIG. 14, in the edge part 32 joined to the edge part 34, the surface opposite to the joining surface is interposed through the second adhesive layer 44 such as a double-sided adhesive tape. It may be bonded to the surface of the cylindrical body 4. In such an aspect, as shown in FIG. 15, after forming the second pressure-sensitive adhesive layer 44 using a double-sided pressure-sensitive adhesive tape or the like on the edge portion 32 of the wound sheet 40 before joining in advance, The end edge portion 32 is inserted between the edge portion 34 and the surface of the cylindrical body 4, and then the end edge portion 32 and the surface of the cylindrical body 4 are bonded via the second pressure-sensitive adhesive layer 44. preferable.

図１１、図１４に示すような、端縁部３２が縁部３４と円筒体４の表面との間に挟まれて被巻取りシート４０が巻芯２ｃに巻き取られる態様は、端面段差痕を更に小さくし、被巻取りシート４０の歩留まりの向上に更に寄与する。   As shown in FIGS. 11 and 14, the end edge portion 32 is sandwiched between the edge portion 34 and the surface of the cylindrical body 4, and the wound sheet 40 is wound around the core 2c. Is further reduced, further contributing to the improvement of the yield of the sheet to be wound 40.

更に又、方形の発泡樹脂シート８ａが、継ぎ目１２ａが円筒体４の軸方向と平行になるように円筒体４に巻きまわされた態様においては、被巻取りシート４０の巻き始めの端縁部３２に等を用いて図１５に示すような帯状の粘着剤層７０を設け、図１６に示すように、端縁部３２を、継ぎ目１２ａをまたいで発泡樹脂シート８ａの表面に粘着層７０を介して接合した状態で、被巻取りシート４０を巻芯２ｃに巻き取ることが出来る。この態様も、端面段差痕を更に小さくし、被巻取りシート４０の歩留まりの向上に更に寄与する。   Furthermore, in the aspect in which the rectangular foamed resin sheet 8a is wound around the cylindrical body 4 so that the joint 12a is parallel to the axial direction of the cylindrical body 4, the edge of the winding start sheet 40 is started. 15 is used to provide a belt-like pressure-sensitive adhesive layer 70 as shown in FIG. 15, and as shown in FIG. 16, the edge layer 32 and the adhesive layer 70 are formed on the surface of the foamed resin sheet 8a across the joint 12a. The wound sheet 40 can be wound around the core 2c in a state of being joined via the core 2c. This aspect also contributes to further improving the yield of the sheet to be wound 40 by further reducing the end surface step marks.

更に、本発明においては、発泡樹脂シートが発泡樹脂シート補強用のフィルムを裏面に積層して補強されてもよい。図１７に発泡樹脂から成るシート８ｃの裏面に補強用フィルム５０を接着剤層５２を介して積層した補強発泡樹脂シート６０を示す。補強用フィルム５０の表面には粘着剤層２０が形成され、粘着剤層２０の表面には離型シート２４が貼着されている。補強発泡樹脂シート６０は引っ張りに対して安定であり、特に大型の巻き芯に発泡樹脂から成るシートを巻きつける操作が安定し、所定の位置に精度良く発泡樹脂から成るシートを巻きつけ貼合することが出来る。   Furthermore, in the present invention, the foamed resin sheet may be reinforced by laminating a film for reinforcing the foamed resin sheet on the back surface. FIG. 17 shows a reinforced foamed resin sheet 60 in which a reinforcing film 50 is laminated on the back surface of a foamed resin sheet 8c with an adhesive layer 52 interposed therebetween. An adhesive layer 20 is formed on the surface of the reinforcing film 50, and a release sheet 24 is attached to the surface of the adhesive layer 20. The reinforced foamed resin sheet 60 is stable against pulling, and particularly the operation of winding the sheet made of the foamed resin around the large winding core is stable, and the sheet made of the foamed resin is wound and bonded to a predetermined position with high accuracy. I can do it.

発泡樹脂から成るシート８ｃとしては発泡樹脂シート８と同様の素材からなるシートが用いられる。補強用フィルム５０としては薄い樹脂フィルムが用いられ、例えば、厚み５〜２０μｍのポリエステルフィルムが好適に用いられる。接着剤層５２は発泡樹脂から成るシート８ｃと補強用フィルム５０とを接着するものであれば特に材質は問わないが、例えば、ポリエチレンフィルムが挙げられる。発泡樹脂から成るシート８ｃと補強用フィルム５０との間にポリエチレンフィルムを配し熱圧着することが出来る。   As the sheet 8c made of foamed resin, a sheet made of the same material as the foamed resin sheet 8 is used. A thin resin film is used as the reinforcing film 50. For example, a polyester film having a thickness of 5 to 20 μm is preferably used. The adhesive layer 52 is not particularly limited as long as it adheres the foamed resin sheet 8c and the reinforcing film 50. For example, a polyethylene film can be used. A polyethylene film can be disposed between the sheet 8c made of foamed resin and the reinforcing film 50 and thermocompression bonded.

本発明の巻芯は、情報機器分野の光学的用途のフィルムの巻き取りに好適に用いられるが、特に、液晶パネル用偏光フィルムの巻き取りに好適に用いられる。液晶パネル用偏光フィルムの一例としては、ポリビニルアルコール系未延伸フィルムを染色し一軸延伸して得られた偏光膜（あるいはポリエチレンテレフタレート系偏光膜）の両面にトリアセチルセルロース膜をラミネートして得られたものが挙げられる。   The winding core of the present invention is preferably used for winding a film for optical applications in the field of information equipment, and is particularly preferably used for winding a polarizing film for a liquid crystal panel. An example of a polarizing film for a liquid crystal panel was obtained by laminating a triacetyl cellulose film on both sides of a polarizing film (or polyethylene terephthalate polarizing film) obtained by dyeing a polyvinyl alcohol-based unstretched film and uniaxially stretching it. Things.

更に、本発明の巻芯は、前述のように弾性層の交換が容易なため、液晶パネル用偏光フィルムに使用される偏光膜やセパレートフィルム、プロテクトフィルムのようなベースフィルムの巻き取りに好適に用いられ、端面段差痕の格段の減少に大きく寄与する。又、プリント基盤用フィルム及びその銅箔ラミネートフィルムの巻き取りに好適に用いられ、端面段差痕の格段の減少に大きく寄与する。   Furthermore, the core of the present invention is suitable for winding a base film such as a polarizing film, a separate film or a protective film used for a polarizing film for a liquid crystal panel because the elastic layer can be easily exchanged as described above. It is used and greatly contributes to a significant reduction in the level difference in the end face. Moreover, it is suitably used for winding up a film for a printed board and its copper foil laminate film, and greatly contributes to a marked decrease in the level difference in the end face.

［実施例１〜６、比較例１、２、参考例１］
図１に示す構成の巻芯をフィルム用の巻き取り装置に装着し、試料のフィルムを巻き取った。巻芯の内径は１５２ｍｍ、肉厚は６ｍｍ、長さは３００ｍｍである。 [Examples 1 to 6, Comparative Examples 1 and 2, Reference Example 1]
The core having the configuration shown in FIG. 1 was mounted on a film winding device, and the sample film was wound. The inner diameter of the winding core is 152 mm, the wall thickness is 6 mm, and the length is 300 mm.

円筒体と発泡樹脂シートの接着は両面粘着テープを用いて予め粘着テープを円筒体に螺旋状に貼り付けて行なった。両面粘着テープとしては、日東電工社製の幅５ｍｍのものを用いた。   Adhesion between the cylindrical body and the foamed resin sheet was performed by pasting the adhesive tape on the cylindrical body in a spiral shape using a double-sided adhesive tape. As the double-sided adhesive tape, one having a width of 5 mm manufactured by Nitto Denko Corporation was used.

端面段差痕の残留性評価：試料のフィルムを表１に示す巻芯に断面積当たりの巻き取り張力が７０N／ｃｍ２、１０ｍ／ｍｉｎで巻き取った。巻き取ったロールを表１に示す保管条件で保管した後、巻き出して巻き始め部の端面段差痕が目視で残留している個所を、特定し、残留している個所のフィルムの長さを計り、フィルム全長に対する比率を端面段差痕残留率として求めた。   Endurance evaluation of end surface step marks: The film of the sample was wound around the core shown in Table 1 at a winding tension of 70 N / cm 2 and 10 m / min. After storing the wound roll under the storage conditions shown in Table 1, it is unwound and the part where the end surface step trace of the winding start part remains visually is identified, and the length of the film at the remaining part is specified. The ratio with respect to the total length of the film was measured as an end face step mark residual ratio.

試料のフィルムである液晶用偏光フィルムは、日東電工社製のものを用いた。   A polarizing film for liquid crystal, which is a sample film, was manufactured by Nitto Denko Corporation.

参考例に使用の銅箔積層体：厚み２５μｍのポリイミドフィルム（東レデュポン（株）製“カプトン”）に厚み３５μｍの圧延銅箔（ジャパンエナジー（株）製）がエポキシ系接着剤を介して貼着された銅箔積層体を用いた。   Copper foil laminate used for reference example: Rolled copper foil of 35 μm thickness (manufactured by Japan Energy Co., Ltd.) is pasted via an epoxy adhesive on a polyimide film of 25 μm thickness (“Kapton” manufactured by Toray DuPont Co., Ltd.) The attached copper foil laminate was used.

Figure 2005162478
Figure 2005162478

表１に示すように、実施例１〜６で得た巻芯を用いて巻き取った液晶用偏光フィルムは、端面段差痕が殆んど生じなかった。一方、紙管を用いた巻芯を用いて巻き取った液晶用偏光フィルムは、多湿の雰囲気に長期保管されると端面段差痕が生じた。   As shown in Table 1, the polarizing film for liquid crystal wound up using the cores obtained in Examples 1 to 6 had almost no end face step marks. On the other hand, when the polarizing film for liquid crystal wound up using a core using a paper tube was stored in a humid atmosphere for a long period of time, end surface step marks were generated.

又、実施例１で使用した巻芯は２０回の使用後に若干の端面段差痕が生じたので発泡樹脂シートを円筒体から剥がして新品と交換した。発泡樹脂シートを剥がしたあとには円筒体表面に接着剤の跡が残らず、新品と交換しても接着剤の痕跡による凹凸はなく、交換後の巻芯の表面は円滑であった。又、交換の操作は短時間で容易になされた。   Further, since the core used in Example 1 had slight end face step marks after 20 times of use, the foamed resin sheet was peeled off from the cylindrical body and replaced with a new one. After peeling off the foamed resin sheet, no trace of adhesive remained on the surface of the cylindrical body, and even when replaced with a new one, there was no unevenness due to the trace of adhesive, and the surface of the wound core after replacement was smooth. Also, the replacement operation was easily performed in a short time.

［実施例７］
図１に示す構成の巻芯をフィルム用の巻き取り装置に装着し、試料のフィルムを巻き取った。巻芯の内径は１５２ｍｍ、肉厚は６ｍｍ、長さは３００ｍｍである。 [Example 7]
The core having the configuration shown in FIG. 1 was mounted on a film winding device, and the sample film was wound. The inner diameter of the winding core is 152 mm, the wall thickness is 6 mm, and the length is 300 mm.

円筒体と発泡樹脂シートの接着は両面粘着テープを用いて予め粘着テープを円筒体に螺旋状に貼り付けて行なった。両面粘着テープとしては、日東電工社製の幅５ｍｍのものを用いた。   Adhesion between the cylindrical body and the foamed resin sheet was performed by pasting the adhesive tape on the cylindrical body in a spiral shape using a double-sided adhesive tape. As the double-sided adhesive tape, one having a width of 5 mm manufactured by Nitto Denko Corporation was used.

又、弾性層としてポリエチレン樹脂発泡樹脂シート（東レ製：商品名ペフ）を用いた。厚みは１ｍｍである。このポリエチレン樹脂発泡樹脂シートの見かけ密度は０．１ｇｒ／ｃｍ３であった。   Further, a polyethylene resin foamed resin sheet (manufactured by Toray: trade name Pef) was used as the elastic layer. The thickness is 1 mm. The apparent density of this polyethylene resin foamed resin sheet was 0.1 gr / cm 3.

端面段差痕の残留性評価：試料のフィルムを表１に示す巻芯に断面積当たりの巻き取り張力が７０N／ｃｍ２、１０ｍ／ｍｉｎで巻き取った。巻き取ったロールを表１に示す保管条件で保管した後、巻き出して巻き始め部の端面段差痕が目視で残留している個所を、特定し、残留している個所のフィルムの長さを計り、フィルム全長に対する比率を端面段差痕残留率として求めた。   Endurance evaluation of end surface step marks: The film of the sample was wound around the core shown in Table 1 at a winding tension of 70 N / cm 2 and 10 m / min. After storing the wound roll under the storage conditions shown in Table 1, it is unwound and the part where the end surface step trace of the winding start part remains visually is identified, and the length of the film at the remaining part is specified. The ratio with respect to the total length of the film was measured as an end face step mark residual ratio.

試料のフィルムである液晶用偏光フィルムは、日東電工社製のものを用いた。   A polarizing film for liquid crystal, which is a sample film, was manufactured by Nitto Denko Corporation.

実施例７で得た巻芯を用いて巻き取った液晶用偏光フィルムは、端面段差痕が殆んど生じなかった。一方、紙管を用いた巻芯を用いて巻き取った液晶用偏光フィルムは、多湿の雰囲気に長期保管されると端面段差痕が生じた。   The polarizing film for liquid crystal wound up by using the core obtained in Example 7 had almost no end surface step marks. On the other hand, when the polarizing film for liquid crystal wound up using a core using a paper tube was stored in a humid atmosphere for a long period of time, end surface step marks were generated.

又、実施例７で使用した巻芯は２０回の使用後に若干の端面段差痕が生じたので発泡樹脂シートを円筒体から剥がして新品と交換した。発泡樹脂シートを剥がしたあとには円筒体表面に接着剤の跡が残らず、新品と交換しても接着剤の痕跡による凹凸はなく、交換後の巻芯の表面は円滑であった。又、交換の操作は短時間で容易になされた。   Further, since the core used in Example 7 had slight end face step marks after 20 times of use, the foamed resin sheet was peeled off from the cylindrical body and replaced with a new one. After peeling off the foamed resin sheet, no trace of adhesive remained on the surface of the cylindrical body, and even when replaced with a new one, there was no unevenness due to the trace of adhesive, and the surface of the wound core after replacement was smooth. Also, the replacement operation was easily performed in a short time.

［実施例８］
図５に示す構成の巻芯２ｂをフィルム用の巻き取り装置に装着し、試料のフィルムを巻き取った。円筒体４として内径１５２ｍｍ、肉厚６ｍｍ、長さ３００ｍｍの紙管を用いた。 [Example 8]
The core 2b having the configuration shown in FIG. 5 was mounted on a film winding device, and the sample film was wound. As the cylindrical body 4, a paper tube having an inner diameter of 152 mm, a thickness of 6 mm, and a length of 300 mm was used.

再剥離性粘着剤層付き発泡樹脂シート２２を構成する発泡樹脂シートとしては、実施例７と同じポリエチレン樹脂発泡樹脂シートを用いた。再剥離性粘着剤としてはリンテック社製のアクリル系樹脂粘着剤を用いた。再剥離性粘着剤層付き発泡樹脂シート２２の厚紙に対する剥離強力は、１．５N／２５ｍｍであった。   As the foamed resin sheet constituting the foamed resin sheet 22 with the releasable pressure-sensitive adhesive layer, the same polyethylene resin foamed resin sheet as in Example 7 was used. As the removable adhesive, an acrylic resin adhesive manufactured by Lintec Corporation was used. The peel strength with respect to the cardboard of the foamed resin sheet 22 with the releasable pressure-sensitive adhesive layer was 1.5 N / 25 mm.

剥離強力は、温度２３℃、相対湿度６５％の雰囲気下で、厚紙に、幅２５ｍｍのテープ状の試験片を重量２ｋｇのゴムローラーをこの試験片上で３往復させることによって貼着し、貼着してから２５分経過後に、試験片の一端を１８０度方向に速度３００ｍｍ／分で剥離させた時の剥離力を測定して求めた。   The peel strength is affixed to a cardboard in an atmosphere of a temperature of 23 ° C. and a relative humidity of 65% by reciprocating a 25 mm wide tape-shaped test piece 3 times on a 2 kg rubber roller on the test piece. Then, after 25 minutes had passed, the peel force when one end of the test piece was peeled at a speed of 300 mm / min in the direction of 180 degrees was determined by measurement.

この巻芯２ｂに実施例７と同様の試料フィルムを巻き取ったときの端面段差痕残留率は、実施例７の場合と同等であった。   When the sample film similar to that in Example 7 was wound around the core 2b, the end face step mark residual ratio was the same as in Example 7.

この巻芯２ｂは、使用後に再剥離性粘着剤層付き発泡樹脂シート２２を円筒体４から容易に剥がすことができた。又、新しい再剥離性粘着剤層付き発泡樹脂シート２２を円筒体４に容易に巻き付けて貼着することができた。   This winding core 2b was able to easily peel off the foamed resin sheet 22 with a releasable pressure-sensitive adhesive layer from the cylindrical body 4 after use. Moreover, the new foaming resin sheet 22 with a releasable adhesive layer was able to be easily wound around the cylindrical body 4 and stuck.

［実施例９］
図７に示す構成の巻芯２ｃをフィルム用の巻き取り装置に装着し、試料のフィルムを巻き取った。巻芯の内径は２５０ｍｍ、肉厚は１２ｍｍ、長さは１６００ｍｍである。 [Example 9]
The core 2c having the configuration shown in FIG. 7 was mounted on a film take-up device, and the sample film was taken up. The inner diameter of the winding core is 250 mm, the wall thickness is 12 mm, and the length is 1600 mm.

巻芯は、紙巻に図１５に示す補強発泡樹脂シート６０（長さ８６０．４ｍｍ×幅１６００ｍｍ）を貼合して得た。発泡樹脂から成るシート８ａとしてはポリエチレン樹脂発泡樹脂シート（東レ製：商品名ペフ）を用いた。厚みは１ｍｍである。このポリエチレン樹脂発泡樹脂シートの見かけ密度は０．１ｇｒ／ｃｍ３であった。補強用フィルム５０としては厚み１２μｍのポリエチレンテレフタレートフィルムが用いられ、ポリエチレンフィルムにより、ポリエチレン樹脂発泡樹脂シートとポリエチレンテレフタレートフィルムが熱圧着ラミネートされていた。粘着剤層は実施例８と同様の素材からなる再剥離性粘着剤層であり、ラミネートされたポリエチレンテレフタレートフィルムの表面に形成された。粘着剤層の表面には離型紙が貼着されていた。補強発泡樹脂シート６０の長手方向端縁は４５度にカットした。離型紙を剥がし除去した後、補強発泡樹脂シート６０を円筒４の表面に貼合した。   The core was obtained by laminating a reinforced foamed resin sheet 60 (length 860.4 mm × width 1600 mm) shown in FIG. As the sheet 8a made of foamed resin, a polyethylene resin foamed resin sheet (manufactured by Toray: trade name Pef) was used. The thickness is 1 mm. The apparent density of this polyethylene resin foamed resin sheet was 0.1 gr / cm 3. As the reinforcing film 50, a polyethylene terephthalate film having a thickness of 12 μm was used, and the polyethylene resin foamed resin sheet and the polyethylene terephthalate film were laminated by thermocompression bonding with the polyethylene film. The pressure-sensitive adhesive layer was a re-peelable pressure-sensitive adhesive layer made of the same material as in Example 8, and was formed on the surface of the laminated polyethylene terephthalate film. A release paper was stuck on the surface of the pressure-sensitive adhesive layer. The longitudinal edge of the reinforced foamed resin sheet 60 was cut at 45 degrees. After peeling off and removing the release paper, the reinforcing foamed resin sheet 60 was bonded to the surface of the cylinder 4.

この巻芯２ｂに実施例７と同様の試料フィルムを図１１に示す態様により巻き取った。端縁部３２の短幅は１５ｍｍであった。   A sample film similar to that in Example 7 was wound around the core 2b in the manner shown in FIG. The short width of the end edge portion 32 was 15 mm.

紙巻への補強発泡樹脂シート６０の巻き付けは操作が安定し、精度良く補強発泡樹脂シート６０を巻きつけることが出来た。   The operation of winding the reinforced foamed resin sheet 60 around the paper roll was stable, and the reinforced foamed resin sheet 60 could be wound with high accuracy.

又、巻き取った液晶用偏光フィルムは、端面段差痕が殆んど生じなかった。   Further, the wound polarizing film for liquid crystal showed almost no end face step marks.

以上本発明の巻芯の態様を説明したが、本発明はその趣旨を逸脱しない範囲で、当業者の知識に基づき種々の改良、修正、変形を加えた態様で実施し得るものであり、これらの態様はいずれも本発明の範囲に属するものである。   Although the embodiment of the core of the present invention has been described above, the present invention can be carried out in various modifications, modifications and variations based on the knowledge of those skilled in the art without departing from the spirit thereof. All of these embodiments belong to the scope of the present invention.

本発明の巻芯の製造方法及び使用方法は、情報機器分野の光学的用途のフィルムの巻き取りに限らず、緩衝層を備えることが必要な巻芯に広く適用出来る。   The method for manufacturing and using the core of the present invention is not limited to winding a film for optical use in the field of information equipment, and can be widely applied to cores that need to have a buffer layer.

本発明の巻芯の態様の一例を示す斜視模式図である。It is a perspective schematic diagram which shows an example of the aspect of the core of this invention. 本発明の巻芯の態様の他の一例を示す斜視模式図である。It is a perspective schematic diagram which shows another example of the aspect of the core of this invention. 発泡樹脂シートの端面同士が相対する継ぎ目の状態を説明する要部端面図である。It is a principal part end view explaining the state of the joint which the end surfaces of a foamed resin sheet oppose. 発泡樹脂シートの端面同士が相対する継ぎ目の好ましい状態を説明する要部端面図である。It is a principal part end view explaining the preferable state of the joint which the end surfaces of a foamed resin sheet oppose. 本発明の巻芯に用いられる再剥離性粘着剤層付き発泡樹脂シートの構成を示す断面図である。It is sectional drawing which shows the structure of the foaming resin sheet with a releasable adhesive layer used for the core of this invention. 本発明の巻芯の態様の他の一例を示す斜視模式図である。It is a perspective schematic diagram which shows another example of the aspect of the core of this invention. 本発明の巻芯の態様の更に他の一例を示す斜視模式図である。It is a perspective schematic diagram which shows another example of the aspect of the core of this invention. 本発明の巻芯の態様の又更に他の一例を示す斜視模式図である。It is a perspective schematic diagram which shows another example of the aspect of the core of this invention. 本発明の巻芯の形成に用いられる粘着剤層付き発泡樹脂シートの構成を示す断面図である。It is sectional drawing which shows the structure of the foamed resin sheet with an adhesive layer used for formation of the core of this invention. 本発明の巻芯の形成に用いられる離型シート・粘着剤層付き発泡樹脂シートの構成を示す断面図である。It is sectional drawing which shows the structure of the release sheet and the foamed resin sheet with an adhesive layer used for formation of the core of this invention. 被巻取りシートの端縁部と発泡樹脂シートとの接合の態様を説明する断面模式図である。It is a cross-sectional schematic diagram explaining the aspect of joining of the edge part of a to-be-winded sheet, and a foamed resin sheet. 切り目入りの離型シートを備えた離型シート・粘着剤層付き発泡樹脂シートの態様を示す断面模式図である。It is a cross-sectional schematic diagram which shows the aspect of the mold release sheet and the foamed resin sheet with an adhesive layer provided with the release sheet with a notch. 被巻取りシートの端縁部と発泡樹脂シートとの接合の過程のひとつを説明する断面模式図である。It is a cross-sectional schematic diagram explaining one of the joining processes of the edge part of a to-be-winded sheet | seat, and a foamed resin sheet. 被巻取りシートの端縁部と発泡樹脂シートとの接合の他の態様を説明する断面模式図である。It is a cross-sectional schematic diagram explaining the other aspect of joining of the edge part of a to-be-winded sheet, and a foamed resin sheet. 被巻取りシートの端縁部と発泡樹脂シートとの接合の過程の他のひとつを説明する断面模式図である。It is a cross-sectional schematic diagram explaining the other one of the process of joining with the edge part of a to-be-winded sheet, and a foamed resin sheet. 被巻取りシートの端縁部と発泡樹脂シートとの接合の更に他の態様を説明する断面模式図である。It is a cross-sectional schematic diagram explaining the further another aspect of joining to the edge part of a to-be-winded sheet, and a foamed resin sheet. 本発明の巻芯の形成に用いられる補強発泡樹脂シートの構成を示す断面図である。It is sectional drawing which shows the structure of the reinforcement foaming resin sheet used for formation of the core of this invention.

符号の説明Explanation of symbols

２：巻芯
４：円筒体
６：弾性層
８、８ａ，８ｃ：発泡樹脂シート
１０：両面粘着テープ
１２、１２ａ、１２ｂ：継ぎ目
２０；剥離性粘着剤層
３２：端縁部
３４：縁部
４０：被巻き取りシート
５０：補強用フィルム
７０：粘着層 2: Core 4: Cylindrical body 6: Elastic layer 8, 8a, 8c: Foamed resin sheet 10: Double-sided adhesive tape 12, 12a, 12b: Seam 20; Peelable adhesive layer 32: Edge 34: Edge 40 : Wound sheet 50: Reinforcing film 70: Adhesive layer

Claims (15)

円筒体の表面に弾性層が設けられ、該弾性層が前記円筒体の表面に接着剥離自在に接着されたフィルム用巻芯。 A film core in which an elastic layer is provided on a surface of a cylindrical body, and the elastic layer is adhered to the surface of the cylindrical body so as to be adhesively peelable. 前記円筒体が樹脂製又は金属製である請求項１に記載の巻芯。 The core according to claim 1, wherein the cylindrical body is made of resin or metal. 前記弾性層が、独立気泡を有し主成分がポリエチレン及びポリプロピレンから選択される発泡樹脂を含む請求項１又は２に記載の巻芯。 The core according to claim 1 or 2, wherein the elastic layer includes a foamed resin having closed cells and a main component selected from polyethylene and polypropylene. 前記発泡樹脂の見かけ密度が０．０３〜０．２ｇｒ／ｃｍ３であり、前記シートの厚みが０．１〜２ｍｍである請求項３に記載の巻芯。 The core according to claim 3, wherein the apparent density of the foamed resin is 0.03 to 0.2 gr / cm 3 and the thickness of the sheet is 0.1 to 2 mm. 前記円筒体に前記弾性層を構成する発泡樹脂又は弾性樹脂を含んで成るシートが巻き回され、該シートが前記表面の少なくとも一部に両面接着テープを介して接着された請求項１乃至４のいずれかに記載の巻芯。 The sheet of foamed resin or elastic resin constituting the elastic layer is wound around the cylindrical body, and the sheet is bonded to at least a part of the surface via a double-sided adhesive tape. The winding core according to any one of the above. 前記両面粘着テープが前記円筒体の両端部周面に貼着される請求項５に記載の巻芯。 The winding core according to claim 5, wherein the double-sided pressure-sensitive adhesive tape is attached to the circumferential surfaces of both ends of the cylindrical body. 前記円筒体に前記弾性層を構成する発泡樹脂又は弾性樹脂を含んで成るシートが巻き回され、該シートが剥離性粘着剤層を備える請求項１乃至４のいずれかに記載の巻芯。 The core according to any one of claims 1 to 4, wherein a sheet including foamed resin or elastic resin constituting the elastic layer is wound around the cylindrical body, and the sheet includes a peelable pressure-sensitive adhesive layer. 前記弾性層に補強用フィルムが積層された請求項１乃至７のいずれかに記載の巻芯。 The core according to any one of claims 1 to 7, wherein a reinforcing film is laminated on the elastic layer. 前記円筒体に前記弾性層を構成する発泡樹脂又は弾性樹脂を含んで成るシートが巻き回され、該シートの継ぎ目において、１のシートの端面の面方向と前記表面の面方向とが斜交し、かつ該１のシートの端面に対向の他のシートの端面とが平行である請求項１乃至８のいずれかに記載の巻芯。 A sheet containing foamed resin or elastic resin constituting the elastic layer is wound around the cylindrical body, and the surface direction of the end surface of one sheet and the surface direction of the surface cross each other at the joint of the sheet. The core according to any one of claims 1 to 8, wherein an end surface of the other sheet is parallel to an end surface of the one sheet. 前記シートの継ぎ目が前記表面に沿った螺旋状である請求項９に記載の巻芯。 The winding core according to claim 9, wherein a seam of the sheet has a spiral shape along the surface. 前記シートの継ぎ目が前記円筒体の軸方向に平行である請求項９に記載の巻芯。 The winding core according to claim 9, wherein a seam of the sheet is parallel to an axial direction of the cylindrical body. 円筒体、発泡樹脂又は弾性樹脂を含んで成り該円筒体の表面に巻き回されることとなるシート、及び両面粘着テープを準備する工程と、
該表面の、該表面に貼合された状態の前記シートの縁同士が隣接する位置の少なくとも一部を含む領域に、前記両面粘着テープを貼着する工程と、
貼着された前記両面粘着テープを介して前記シートを前記表面に貼合する工程と
を含む巻芯の製造方法。 A step of preparing a cylindrical body, a sheet comprising a foamed resin or an elastic resin and to be wound around the surface of the cylindrical body, and a double-sided adhesive tape;
A step of adhering the double-sided pressure-sensitive adhesive tape to a region including at least a part of a position where edges of the sheet in the state of being bonded to the surface are adjacent to each other;
And a step of bonding the sheet to the surface via the bonded double-sided pressure-sensitive adhesive tape. 被巻き取りシートを巻き取る巻芯の使用方法であって、
円筒体と、発泡樹脂又は弾性樹脂を含んで成り該円筒体の表面に巻き回されることとなり片面に剥離性粘着剤層が設けられたシートとを準備する工程、
前記シートを前記表面に貼合して巻芯を得る工程、
該巻芯に被巻き取りシートを巻き取る工程、
該巻芯から該被巻き取りシートを巻き出して除去する工程、
該巻芯から前記シートを剥離して除去する工程、
新しい前記シートを前記円筒体の表面に貼合する工程、
を含む巻芯の使用方法。 A method of using a winding core for winding a wound sheet,
Preparing a cylindrical body and a sheet comprising a foamed resin or an elastic resin and wound around the surface of the cylindrical body and provided with a peelable adhesive layer on one side;
Bonding the sheet to the surface to obtain a core;
A step of winding a wound sheet around the core;
Unwinding and removing the wound sheet from the core;
Peeling and removing the sheet from the core;
Bonding the new sheet to the surface of the cylindrical body;
How to use a core containing 被巻き取りシートを巻芯に巻き取る方法であって、
請求項１１に記載の巻芯を準備する工程、
前記１のシートの端面に沿った前記シートの端縁と前記円筒体の表面との間に前記被巻き取りシートの巻き始めの端縁部を挿入する工程、
前記被巻き取りシートの前記巻芯への巻き取りを開始する工程、
を含む巻き取り方法。 A method of winding a wound sheet around a core,
Preparing the core according to claim 11;
Inserting a winding start edge portion of the sheet to be wound between the edge of the sheet and the surface of the cylindrical body along the end surface of the one sheet;
Starting the winding of the wound sheet to the core;
Winding method including. 被巻き取りシートを巻芯に巻き取る方法であって、
請求項１１に記載の巻芯を準備する工程、
前記被巻き取りシートの巻き始めの端縁部の片面に粘着層を形成する工程、
前記端縁部を、前記継ぎ目をまたいで前記シートの表面に粘着層を介して接合する工程、
前記被巻き取りシートの前記巻芯への巻き取りを開始する工程、
を含む巻き取り方法。
A method of winding a wound sheet around a core,
Preparing the core according to claim 11;
Forming an adhesive layer on one side of the edge of the winding start of the wound sheet,
Bonding the edge to the surface of the sheet across the seam via an adhesive layer;
Starting the winding of the wound sheet to the core;
Winding method including.
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