JP2745338B2 - Web joining method - Google Patents
Web joining methodInfo
- Publication number
- JP2745338B2 JP2745338B2 JP26532490A JP26532490A JP2745338B2 JP 2745338 B2 JP2745338 B2 JP 2745338B2 JP 26532490 A JP26532490 A JP 26532490A JP 26532490 A JP26532490 A JP 26532490A JP 2745338 B2 JP2745338 B2 JP 2745338B2
- Authority
- JP
- Japan
- Prior art keywords
- web
- coating
- stepped
- ultrasonic
- webs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
- B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
- B29C65/085—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary sonotrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/435—Making large sheets by joining smaller ones or strips together
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
- B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
- B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
- B29C66/81469—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed next to the other in a single line transverse to the feed direction, e.g. shoulder to shoulder sonotrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83411—Roller, cylinder or drum types
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
- B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
- B29C65/5021—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being multi-layered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5092—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the tape handling mechanisms, e.g. using vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4324—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making closed loops, e.g. belts
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、スライドビード塗布方法などにおいて、ウ
ェブ接合部が塗布部通過の際のコーティング変動を防止
し、かつ接合部強度補強を図ったウェブの接合方法に関
する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a slide bead coating method and the like, in which a web is prevented from fluctuating at the time when a web joining portion passes through the applying portion, and the web is strengthened at the joining portion. The joining method.
たとえば、感光材料や磁気記録媒体の製造における多
層塗布などに際して、いわゆるスライドビード塗布方法
が用いられている。For example, a so-called slide bead coating method is used for multilayer coating in the production of a photosensitive material or a magnetic recording medium.
前記スライドビード塗布方法は、スライドホッパーか
ら流出させた塗布液を、ホッパーリップ端において数十
〜数百μｍのギャップ（隙間）を有する状態で走行する
ウェブに対し、架橋状態に転移させて塗布する塗布方法
である。In the slide bead coating method, a coating liquid flowing out of a slide hopper is transferred to a web running in a state having a gap (gap) of several tens to several hundreds μm at the end of the hopper lip, and is applied in a crosslinked state. It is a coating method.
近年、このスライドビード塗布方法についても各種の
改良が試みられ、たとえば特公昭49−17853号公報にお
いては、第７図に示されるように、中空ドラムに多数の
気体噴射口を形成し、この中空ドラムを巡ってウェブを
搬送する過程で、気体噴射口から気体を噴射させてウェ
ブをそのドラムから浮上させながら塗布を行う方法が開
示されている。また、米国特許第2,681,294号において
は、ビードの形成箇所の下方に、減圧チャンバーを設け
て架橋状態にある塗布液（ビード）を安定化させる方法
が開示されている。In recent years, various improvements have been attempted for this slide bead coating method. For example, in Japanese Patent Publication No. Sho 49-17853, a number of gas injection ports are formed in a hollow drum as shown in FIG. A method is disclosed in which in the process of transporting a web around a drum, a gas is injected from a gas injection port to apply the coating while floating the web from the drum. U.S. Pat. No. 2,681,294 discloses a method of stabilizing a crosslinked coating solution (bead) by providing a decompression chamber below a bead forming portion.
前記スライドビード塗布方法においては、塗布を中断
することは生産性の低下を招くために、順次ウェブ同士
を接続し連続化させて搬送しながら塗布を行うことが望
まれる。In the slide bead coating method, since interrupting the coating causes a decrease in productivity, it is desired that the webs be connected sequentially, and the coating be performed while the webs are transported in a continuous manner.
このためのウェブ接続方法としては、スプライステー
プを用いて両ウェブ端同士を接続する方法、ウェブ同士
を超音波により溶着して接続する方法などが多用されて
いる。As a web connection method for this purpose, a method of connecting both web ends using a splice tape, a method of welding and connecting webs by ultrasonic waves, and the like are frequently used.
前記スプライステープ方式に関しては、たとえば特公
昭47−42725号公報、特開昭54−34343号公報、特開昭50
−49338号公報などにその開示があり、本出願人におい
ても、当初スプライステープの後端部を鋸歯状にしたス
プライステープを用いた接合法を考えた。Regarding the splice tape system, for example, JP-B-47-42725, JP-A-54-34343, JP-A-
Japanese Patent Application No. 49338/49 discloses such a technique, and the present applicant has also considered a joining method using a splice tape in which the rear end of the splice tape has a sawtooth shape.
一方、前記超音波溶着方式に関しては、たとえば特公
平１−41981号公報において、第６図に示されるよう
に、回転可能な円板状超音波ホーン20によりローリング
加圧しながらウェブ３、３′のラップ部分の溶着を行う
超音波接合装置の開示がある。On the other hand, regarding the ultrasonic welding method, for example, in Japanese Patent Publication No. 1-41981, as shown in FIG. 6, the webs 3, 3 'are rolled while being pressed by a rotatable disk-shaped ultrasonic horn 20. There is an ultrasonic bonding apparatus for welding a lap portion.
他方、特公昭62−3069号公報においては、接合される
ウェブの端同士を突き合わせた状態で、この突き合わせ
部分を覆って表裏側にスプライス片を配設し、このスプ
ライス片を所定の圧力と温度を加えることによって、溶
融の過程で前記表側スプライスの溶融部分がウェブ突き
合わせ部分の隙間に流れ込み、スプライスの前端および
後端部から漸進的に厚さを減じる滑らかな傾斜面を形成
するようにしたウェブ接合方法が開示されている。On the other hand, in Japanese Patent Publication No. Sho 62-3069, a splice piece is disposed on the front and back sides to cover the abutting portion with the ends of the webs to be joined abutting each other, and the splice piece is subjected to a predetermined pressure and temperature. In the course of melting, the molten portion of the front splice flows into the gap between the web abutting portions, and forms a smooth inclined surface that gradually reduces the thickness from the front end and the rear end of the splice. A joining method is disclosed.
前述のようにウェブ同士をスプライステープにより接
合する場合には、接合テープ端における段差のために、
ビード通過の際にビード崩壊や縦スジ故障などの塗布故
障を誘発していた。When joining webs with a splice tape as described above, due to a step at the end of the joining tape,
When passing the bead, application failure such as bead collapse and vertical streak failure was induced.
前記ビード崩壊を防止するためには、ウェブ接合部が
ビード部通過の際に、前述減圧チャッバーの減圧量をア
ップする方法が有効的であるが、この方法によれば減圧
アップ区間に縦スジ故障が発生する。通常、この減圧ア
ップ区間は７〜10m程度であるが、塗布液自体が高価な
ため経済的損失は極めて大きい。In order to prevent the bead collapse, it is effective to increase the decompression amount of the decompression chamber when the web joint passes through the bead portion. Occurs. Normally, the decompression up section is about 7 to 10 m, but the coating solution itself is expensive, so that the economic loss is extremely large.
また、スプライステープによる接合の場合には、テー
プ接着層のノリのはみ出しによるガイドロールのプレッ
シャー故障などを引き起こす場合がある。Further, in the case of joining with a splice tape, pressure failure of the guide roll due to protrusion of the tape adhesive layer may occur.
一方、ウェブの材質によっては、超音波接合時におけ
る熱影響により、物性が変化し引裂強度が低下するた
め、搬送時における捩じれまたは片ずれによって、ウェ
ブが切断する場合がある。On the other hand, depending on the material of the web, physical properties change and tear strength decrease due to thermal effects at the time of ultrasonic bonding, so that the web may be cut due to torsion or misalignment during transport.
そこで本発明の目的は、前記問題に鑑み、ノリのはみ
出しによるガイドロールのプレッシャー故障を無くすと
ともに、スジ・泡などのコーティング変動の原因である
接合部段差を無くし、さらにウェブ切断を防止するため
に接合部引裂強度の増強を図ったウェブの接合方法を提
供するものである。In view of the above problems, it is an object of the present invention to eliminate pressure failure of a guide roll due to sticking out of a glue, to eliminate a step at a joint portion which causes coating variation such as streaks and bubbles, and to further prevent web cutting. An object of the present invention is to provide a method for joining webs in which the joint tear strength is enhanced.
前記課題は、連続搬送される先行ウェブの後端部とこ
れに続く次行ウェブの先端部とを重ね合わせ、この重ね
合わせ部に超音波ホーンのチップ部分を接触させて超音
波振動を与えることにより、ウェブ同士を溶着接合させ
るに当たり、 前記重ね合わせによる表裏段部の少なくとも一方を跨
いで超音波ホーンのチップ部分を接触させウェブの溶融
を行いながら溶着接合するとともに、超音波ホーンのチ
ップ部分の接触が前記段部の一方のみであるとき、塗布
面をその一方の段部側としかつウェブの搬送方向を当初
の段差面が進行方向に向かうようにし、超音波ホーンの
チップ部分の接触面が前記重ね合わせ代全体をカバーす
るとき、ウェブの搬送方向および塗布面を当初の段差面
が進行方向に向かう方向およびその段差面側とする条件
の下で塗布面を表裏任意とし、さらにウェブ両側部の非
塗布領域に両ウェブを跨いで引裂補強材を設けることで
解決できる。The problem is to superimpose the rear end of the preceding web that is continuously conveyed and the front end of the next web that follows, and to apply ultrasonic vibration by contacting the tip of the ultrasonic horn with the superimposed portion. According to the above, when the webs are welded and joined, the ultrasonic horn tip portion is brought into contact with the tip portion of the ultrasonic horn while contacting the tip portion of the ultrasonic horn across at least one of the front and back steps by the superposition, and the ultrasonic horn tip portion. When the contact is only one of the step portions, the application surface is set to the one step portion side and the conveying direction of the web is such that the initial step surface is directed to the traveling direction, and the contact surface of the tip portion of the ultrasonic horn is When covering the entire overlap margin, coating is performed under the conditions that the web transport direction and the application surface are set to the direction in which the initial step surface is directed toward the traveling direction and the step surface side. The problem can be solved by setting the cloth surface to be front and back, and providing a tear-reinforcing material across both webs in the non-application area on both sides of the web.
前記ウェブ接合部での塗布障害は、主に接合部の盛り
上がりによるビード部のギャップ変動およびスプライス
テープ後端部側（ウェブ進行方向の後方側）に形成され
る段差に抱き込まれた空気がビード部に滞留し、ウェブ
長手方向に細長いスジを発生させるためである。The coating failure at the web joining portion is mainly caused by the gap variation of the bead portion due to the swelling of the joining portion and the air entrapped in the step formed at the rear end side of the splice tape (rear side in the web advancing direction). This is because the stagnation occurs in the portion and a long and narrow line is generated in the longitudinal direction of the web.
したがって、本発明においては、好ましくは次行ウェ
ブの先端を先行ウェブの後端の塗布面側に重ね合わせる
とともに、少なくとも一方の段差をカバーして、より好
ましくは前記重ね合わせ代全体をカバーする大きさの超
音波ホーンを用いることとしている。Therefore, in the present invention, preferably, the leading end of the next web is overlapped with the coating surface side of the trailing end of the preceding web, and at least one step is covered, and more preferably, the size of covering the entire overlapping margin is covered. Ultrasonic horn is used.
これに対して、たとえば、第９図および第10図に示さ
れる従来の超音波接合（特公平１−41981号公報）のよ
うに、両ウェブの重ね合わせ部の途中部分のみに接触す
るホーン20、21である場合には、後部段差Ｄのために縦
スジ・泡の発生が避けられないとともに、両ウェブ３、
３′の芯々間偏心距離ｌのため、第11図（ａ）（ｂ）に
示されるように両ウェブにテンションが付加された状態
では接合部の回転によりＡ部に角折れが生じ、この角折
れ部Ａが原因して、ビードギャップ変動による塗布障害
が見られる場合がある。On the other hand, for example, as in the conventional ultrasonic bonding (Japanese Patent Publication No. 1-41981) shown in FIGS. , 21, vertical streaks and bubbles are unavoidable due to the rear step D, and both webs 3,
Due to the eccentric distance 1 between the center and the center 3 ', as shown in FIGS. 11 (a) and 11 (b), when tension is applied to both the webs, the rotation of the joining portion causes the portion A to bend and this corner is bent. Due to the bent portion A, coating failure due to bead gap fluctuation may be observed.
しかし、本発明法の場合には、第１図（ａ）に示され
るように、好ましくは重ね合わせ部全体に渡って超音波
振動を与え、溶着するようにしているため、重ね合わせ
部での溶融が進み、同図（ｂ）、および詳細には同図
（ｄ）に示すように、次行ウェブ３′の先端部において
当初の厚みより薄くなることにより、次行ウェブ３′の
先端と先行ウェブ３の塗布面との段差が小さくなり、泡
の巻き込み要因が実質的に解消される。However, in the case of the method of the present invention, as shown in FIG. 1 (a), ultrasonic vibration is preferably applied to the entire overlapped portion and welding is performed. As the melting progresses, as shown in FIG. 4B and, more specifically, as shown in FIG. 4D, the tip of the next web 3 ′ becomes thinner than the initial thickness, so that the tip of the next web 3 ′ is formed. The step difference from the application surface of the preceding web 3 is reduced, and the factor of entrainment of bubbles is substantially eliminated.
さらに、本発明においては、好ましくは先行ウェブ３
の塗布面上に次行ウェブ３′を重ね合わせているので、
先行ウェブ３の当初の後端に相当する位置からそれより
若干後方の位置に渡って、その塗布面が実質的に滑らか
な連続面として形成されるため、ギャップの急激な変動
が抑制され、この点において、後方においても空気の抱
き込みが無くなるため、ピンホール故障が防止される。
しかも、ギャップ変動に伴う膜厚変動を防止するために
減圧チャンバーを介しての減圧力を高めることなくスジ
故障を防止できる。Further, in the present invention, preferably, the leading web 3 is used.
Since the next web 3 'is overlaid on the coating surface of
Since the application surface is formed as a substantially smooth continuous surface from a position corresponding to the initial rear end of the leading web 3 to a position slightly behind the leading end, rapid fluctuation of the gap is suppressed, and In this respect, since the air is not entrapped behind, pinhole failure is prevented.
In addition, a streak failure can be prevented without increasing the pressure reduction force via the pressure reduction chamber in order to prevent a film thickness change due to a gap change.
他方、従来の重ね合わせ部分の途中の一部のみを超音
波シールすることの対比では、本発明によると、両ウェ
ブ３、３′の芯々間偏心距離ｌが実質的に無くなり、こ
れに伴うトラブルを解消できる。On the other hand, in contrast to the conventional ultrasonic sealing of only a part of the overlapped portion, according to the present invention, the eccentric distance l between the cores of the two webs 3 and 3 'is substantially eliminated, and the trouble caused by this is eliminated. Can be eliminated.
一方、ウェブ塗布面と進行方向との関係については、
超音波ホーンのチップ部分の接触が両段差の内の一方で
あるときには、塗布面をその一方の段差側に限定し、か
つその段差を超音波ホーンにより溶融される以前の「当
初の段差面」が進行方向に向かう方向に限定することに
よって、前述のように実質的に後部段差を無くし、滑ら
かな連続面として形成されるため、スジ・泡等の塗布故
障を防止できる。また、超音波ホーンのチップ部分の接
触面が重ね合わせ代全体をカバーする場合には、ウェブ
搬送方向および塗布面は「当初の段差面」が進行方向に
向かう方向およびその段差面側とすることで、実質的に
後部段差を無くし、スジ・泡等の塗布故障を防止でき
る。On the other hand, regarding the relationship between the web application surface and the traveling direction,
When the contact of the tip of the ultrasonic horn is one of the two steps, the coating surface is limited to one of the steps, and the "step surface" before the step is melted by the ultrasonic horn. Is limited to the direction toward the advancing direction, the rear step is substantially eliminated as described above, and a smooth continuous surface is formed. Therefore, coating failure such as stripes and bubbles can be prevented. If the contact surface of the tip of the ultrasonic horn covers the entire overlap margin, the web transport direction and the application surface should be in the direction in which the “initial step surface” is in the direction of travel and on the step surface side. Thus, the rear step can be substantially eliminated, and coating failures such as streaks and bubbles can be prevented.
さらに、セルローストリアセテートなどを塗布ベース
とした場合には、前記超音波接合の熱影響による物性の
変化により引裂強度が低下し、接合部で切断する場合が
あるが、本発明においては、ウェブ両側部の非塗布領域
に引裂補強材を設けることとしているため、搬送時にお
ける捩じれまたは片ズレにより応力の集中するウェブの
両側部において補強がなされているため効果的に切断を
防止することができる。従来のように接合部にテープ類
を使用した場合には、ノリのはみ出しによるガイドロー
ルのプレッシャー故障などが問題となるが、本発明にお
いては、引裂補強材の配設位置をウェブ両側部に限定し
ているため、ガイドロールにノリが付着しても塗布面に
与える影響が少ない。Further, when cellulose triacetate or the like is used as a coating base, the tear strength is reduced due to a change in physical properties due to the heat effect of the ultrasonic bonding, and the material may be cut at the bonded portion. Since the tear-reinforcing material is provided in the non-applied area, the web is reinforced on both sides of the web where stress is concentrated due to twisting or one-sided displacement during transport, so that cutting can be effectively prevented. If tapes were used for the joints as in the past, there would be a problem such as pressure failure of the guide roll due to sticking out of the glue, but in the present invention, the disposition position of the tear reinforcing material is limited to both sides of the web Therefore, even if glue is adhered to the guide roll, the influence on the coating surface is small.
以下、本発明を図面に基づき詳説する。 Hereinafter, the present invention will be described in detail with reference to the drawings.
本発明ウェブ継ぎ合わせ法は、第７図に示されるスラ
イドビード塗布方法との関係において、特にその効果が
顕著に現れる。The effect of the web splicing method of the present invention is particularly remarkable in relation to the slide bead coating method shown in FIG.
第７図はかかるスライドビード塗布方法とエアロール
搬送方式との組合せ例を示しており、１は中空のエア吹
出しドラムで、その円筒壁面のほぼ半円部分に吹出し口
1a、1a…が多数形成されている。このドラム１にはブロ
ワー２が連通されており、このブロワー２からのエアが
各吹出し口1a、1a…から吐出されるようになっている。FIG. 7 shows an example of a combination of such a slide bead coating method and an air roll conveying method, wherein 1 is a hollow air blowing drum, and a blowing port is provided in a substantially semicircular portion of the cylindrical wall surface.
Many 1a, 1a ... are formed. A blower 2 is communicated with the drum 1, and air from the blower 2 is discharged from each of the outlets 1a.
かかる気体噴射器に対して、ウェブ３が進入し、ドラ
ム１を巡り、気体噴射器からの吐出エア圧力により浮上
搬送される過程で、スライドホッパー型塗布コータ５か
らビード塗布される。この塗布コータ５は、具体例で
は、二つの流出スリット5A、5Bを有し、異なる塗布液6
A、6Bがウェブ３上に２層塗布される。すなわち、塗布
コータ５内に形成された液溜め部5C、5Dに図示されない
ポンプを介して押し込まれた塗布液6A、6Bが前記流出ス
リット5A、5Bから流出され、２層状態でウェブ３上に向
かう。この時、塗布コータ５のヘッド肩とウェブ３の表
面との間に僅かなビードギャップＧを有しており、かつ
ウェブ３が連続的に搬送されているので、各塗布液6A、
6Bは前記ギャップＧにてビードを形成しながら架橋状態
で連続的に塗布される。The web 3 enters the gas injector, travels around the drum 1, and is floated and conveyed by the pressure of the discharge air from the gas injector, and is bead-coated from the slide hopper type coating coater 5. This coating coater 5 has, in a specific example, two outflow slits 5A and 5B,
A and 6B are applied on the web 3 in two layers. That is, the coating liquids 6A and 6B pushed into the liquid reservoirs 5C and 5D formed in the coating coater 5 through a pump (not shown) flow out of the outflow slits 5A and 5B, and are formed on the web 3 in a two-layer state. Heading. At this time, since there is a slight bead gap G between the head shoulder of the coating coater 5 and the surface of the web 3, and since the web 3 is continuously conveyed, each coating liquid 6A,
6B is continuously applied in a crosslinked state while forming beads in the gap G.
また、減圧チャンバー７が前記ビード部の下方に設け
られており、減圧チャンバー７内方に連通する導管８を
介してブロワーなどの減圧手段に連結されている。Further, a decompression chamber 7 is provided below the bead portion, and is connected to a decompression means such as a blower through a conduit 8 communicating with the inside of the decompression chamber 7.
前記スライドビード塗布装置においては、ウェブ３を
切れ目無く連続的に搬送するために、本発明継ぎ合わせ
法が好適に適用される。In the slide bead coating apparatus, the seaming method of the present invention is suitably applied in order to continuously and continuously transport the web 3.
継ぎ合わせに際しては、第１図（ａ）に示されるよう
に、アンビル13上において、先行ウェブ３後端の塗布面
側に次行ウェブ３′の先端を重ね合わせる。この重ね合
わせ代については特に限定されないが、通常0.3〜40mm
が好ましい。At the time of joining, as shown in FIG. 1 (a), the front end of the next web 3 'is superimposed on the coating surface side of the rear end of the preceding web 3 on the anvil 13. The overlap margin is not particularly limited, but is usually 0.3 to 40 mm
Is preferred.
本発明に用いる超音波ホーン10は、塗布対象面側に配
設され、好ましくは前記重ね合わせ代ｂよりも幅広の面
着面積を有するホーンチップ幅Ｂを有する超音波ホーン
10とされる。前記ホーン10のウェブに対する押圧力Ｐ
は、1500〜4000g/mm2程度、また超音波振動の片振幅は1
0〜30μｍ程度が望ましい。前記ホーン10のウェブ３幅
方向の形状や配置等については、たとえば第４図に示さ
れるように、ウェブ３全幅に渡るものでもよいし、また
第５図に示されるように、短幅のホーン11を複数個並べ
るようにしてもよい。あるいは、第６図に示されるよう
に、円板状20のホーンを用い、ウェブ３の幅方向にロー
リングする方式でもよい。The ultrasonic horn 10 used in the present invention is disposed on the surface to be coated, and preferably has an ultrasonic horn having a horn tip width B having a wider surface area than the overlapping margin b.
It is assumed to be 10. Pressing force P of the horn 10 against the web
Is, 1500~4000g / mm 2 approximately, also half amplitude of the ultrasonic vibration 1
About 0 to 30 μm is desirable. The shape and arrangement of the horn 10 in the width direction of the web 3 may be, for example, as shown in FIG. 4 or over the entire width of the web 3, or as shown in FIG. A plurality of 11 may be arranged. Alternatively, as shown in FIG. 6, a method of rolling in the width direction of the web 3 using a disk-shaped horn may be used.
以上詳述したホーン10による溶着後の接合形状に関し
て、本発明においては、重ね合わせ部全体に渡って超音
波振動を与え、溶着するようにしているため、重ね合わ
せ部でのウェブ材料の溶融およびフローが進み、第１図
（ｂ）に示すように、次行ウェブ３′の先端部において
当初の厚みより薄くなることにより、次行ウェブ３′の
先端と先行ウェブ３の塗布面との段差が小さくなり、泡
の巻き込み要因が実質的に解消される。しかし、通常は
次行ウェブ３′の先端での前部段差FGが完全に解消され
るわけでなく、若干残る。かかる前部段差FGについて
は、好ましくは150μｍ以下、より望ましくは50μｍ以
内、最も好ましくは20μｍ以内であり、逆にこのような
寸法の前部段差FGとなるように、溶着を行うことが望ま
れる。Regarding the joint shape after welding by the horn 10 described in detail above, in the present invention, ultrasonic vibration is applied to the entire overlapping portion and welding is performed, so that melting of the web material in the overlapping portion and As the flow proceeds, as shown in FIG. 1 (b), the tip of the next web 3 'becomes thinner than the initial thickness, so that the step between the tip of the next web 3' and the application surface of the preceding web 3 is formed. Is reduced, and the factor of entrainment of bubbles is substantially eliminated. However, normally, the front step FG at the leading end of the next web 3 'is not completely eliminated but slightly remains. The front step FG is preferably 150 μm or less, more preferably 50 μm or less, and most preferably 20 μm or less. Conversely, it is desired to perform welding so that the front step FG has such dimensions. .
他方、本発明においては、先行ウェブ３の塗布面上に
次行ウェブ３′を重ね合わせた状態で溶着を行うので、
次行ウェブ３′先端部の塗布対象面形状が、通常、第１
図（ｂ）に示すように、ウェブの進行方向と反対方向
（右方向）に行くにつれて、なだらかに盛り上がり山を
越えてなだらかに下り、やがて裾において段差を生じる
ことなく、非重ね合わせ部分に連なって行く形状とな
る。On the other hand, in the present invention, since welding is performed in a state where the next web 3 ′ is superimposed on the coating surface of the preceding web 3,
Usually, the shape of the surface to be applied at the tip of the next web 3 ′ is the first
As shown in FIG. 2B, as it goes in the direction (rightward) opposite to the traveling direction of the web, it rises gently and goes down gently over the mountain, and eventually continues to the non-overlapping portion without generating a step at the foot. Shape.
前記重ね合わせ部の盛り上がり高HGは、好ましくはビ
ードギャップＧの50％以内、より好ましくは30％以内と
するのが望ましい。The height HG of the overlapping portion is preferably within 50% of the bead gap G, and more preferably within 30%.
かかる接合形状を得ることができることは、きわめて
塗布性に関して有効である。すなわち、前述のように、
本発明者らが、スプライステープ接合方式において経験
した知見によると、空気抱き込みによるスジ・泡の発生
は、前部段差によるものより、後部段差によるものが支
配的である。したがって、本発明の接合法を採る限り、
常に後部段差を発生させないことは、塗布故障を解消す
ることになる。また、接合の都度、減圧チャンバーによ
る減圧力をアップすることを不要とする。Being able to obtain such a joint shape is extremely effective in terms of applicability. That is, as described above,
According to the knowledge that the present inventors have experienced in the splice tape joining method, the generation of streaks and bubbles due to air entrapment is more predominantly caused by the rear step than by the front step. Therefore, as long as the joining method of the present invention is adopted,
Keeping the rear step from occurring will eliminate coating failures. In addition, it is not necessary to increase the decompression force by the decompression chamber every time joining is performed.
一方、第12図のように、先行ウェブ３上に次行ウェブ
３′を重ね合わせ、次行ウェブ３′による段差のみを覆
って上方から超音波ホーン10を押圧接触させ、接合する
こともできる。この場合、上面を塗布面とするとき、左
方に進行させると、後部段差が発生するので、右方に進
行させることが必要となる。また、裏面を塗布面とする
場合には、下方ウェブの段差を当初の段階から小さくで
きず、そのままであるため、裏面を塗布面とすることは
できない。On the other hand, as shown in FIG. 12, the next web 3 'may be superimposed on the preceding web 3 and the ultrasonic horn 10 may be pressed and contacted from above so as to cover only the step formed by the next web 3' and joined. . In this case, when the upper surface is used as the application surface, if it advances to the left, a rear step occurs, so it is necessary to advance to the right. In addition, when the back surface is used as the application surface, the step of the lower web cannot be reduced from the initial stage and remains as it is, so that the back surface cannot be used as the application surface.
また、第１図例のように、重ね合わせ代全体をカバー
して超音波ホーン10を配置して、前部および後部段差の
溶融を行わせる場合には、両段差の減少化が行われるの
で、裏面（下面）を塗布面とすることができる。ただ
し、裏面を塗布面とする場合、後部段差は塗布故障の最
大の原因となるので、ウェブの進行方向としては、第１
図右方であることが必要となる。In addition, as shown in FIG. 1, when the ultrasonic horn 10 is arranged so as to cover the entire overlap margin and the front and rear steps are melted, both steps are reduced. The back surface (lower surface) can be used as the application surface. However, when the back surface is used as the coating surface, the rear step becomes the largest cause of coating failure.
It must be on the right side of the figure.
また、本発明は、前述のように、スライドビード塗布
方法とエアロール搬送方式との組み合わせにおいて、特
に顕著な効果が現れるが、塗布方法として押出し塗布な
どの方式でもよく、他方搬送方式として、バックアップ
ロール搬送方式などでもよい。また、本発明に係るウェ
ブとしては、ポリエチレンテレフタレート（PET）、セ
ルローストリアセテートなどのプラスチックフィルム、
印画紙などがあり、さらに塗布液としては、写真感光材
料や磁気記録材料などがある。In addition, the present invention, as described above, exhibits a particularly remarkable effect in the combination of the slide bead coating method and the air roll transfer method, but the coating method may be extrusion coating or the like, while the transfer method may be a backup roll. A transport system may be used. Examples of the web according to the present invention include plastic films such as polyethylene terephthalate (PET) and cellulose triacetate;
There are photographic paper and the like, and as the coating liquid, there are photographic photosensitive materials and magnetic recording materials.
本発明においては、さらに塗布ベースとして、たとえ
ばセルローストリアセテートなどを使用した場合には、
溶着部の物性変化により著しい引裂強度の低下が見られ
るため、第１図（ｃ）に示されるように、ホーン10によ
る溶着後、接合部の非塗布面側に引裂補強材たる銀マッ
トテープ3A（Alテープ）を接着させる。この段階では熱
影響を受けることがないため、前記銀マットテープ3Aに
代えて、ウェブ材３、３′と同材質のセルローストリア
セテートを接着することでもよい。前記引裂補強材の配
設位置は、第３図に示されるように、ウェブ３両側部の
非塗布領域Ｆとし、かかる形状は，たとえば第３図
（ａ）〜（ｅ）に示されるように任意に決定し得る。In the present invention, when a cellulose triacetate or the like is further used as a coating base, for example,
As shown in FIG. 1 (c), after mating with the horn 10, the silver mat tape 3A serving as a tear reinforcing material is formed on the non-applied surface side of the joint because a significant decrease in tear strength is observed due to a change in the physical properties of the weld. (Al tape). At this stage, since it is not affected by heat, cellulose triacetate of the same material as the web materials 3 and 3 'may be bonded instead of the silver mat tape 3A. As shown in FIG. 3, the disposition position of the tear reinforcing material is a non-application area F on both sides of the web 3, and such a shape is, for example, as shown in FIGS. 3 (a) to 3 (e). It can be determined arbitrarily.
前記引裂補強材は、超音波ホーン10によるウェブ３、
３′の溶着時に、ポリエチレンテレフタレート（PETフ
ィルム）などの引裂補強材3Aをウェブ３、３′とアンビ
ル13との間に介在させた状態でホーン10によりウェブ
３、３′の溶着と同時溶着するようにしてもよい。前記
引裂補強材3Aとして用いるセルローストリアセテート、
ポリエチレンテレフタレートなどに関し、さらに引裂強
度増加を図りたい場合には、繊維組織を含有するものを
用いることもできる。The tear reinforcement is a web 3 of ultrasonic horn 10,
At the time of welding the 3 ', the horn 10 simultaneously welds the webs 3, 3' with the tear reinforcing material 3A such as polyethylene terephthalate (PET film) interposed between the webs 3, 3 'and the anvil 13. You may do so. Cellulose triacetate used as the tear reinforcing material 3A,
When it is desired to further increase the tear strength of polyethylene terephthalate or the like, a material containing a fiber structure can be used.
以下、本発明の効果について実施例に基づき詳説す
る。Hereinafter, the effects of the present invention will be described in detail based on examples.
（実施例１） 第７図（ａ）に示されるスライドビード塗布装置によ
るセルローストリアセテートベースへの塗布に際し、第
８図（ａ）の平面図、およびその側面図の第８図（ｂ）
に示されるように、ウェブに対し比較として従来接合法
であるバッドスプライス14（ケース１）と鋸歯状スプラ
イス15（ケース２）の２種類のスプライスを施すととも
に、本発明法による超音波スプライス16（ケース３）を
施し、種々ウェブ搬送速度を変えながら、ビード塗布を
行い、そのスジ・泡等の発生状況について比較調査し
た。(Example 1) FIG. 8 (a) is a plan view of FIG. 8 (a) and FIG. 8 (b) is a side view of the slide bead coating apparatus shown in FIG. 7 (a) when the cellulose triacetate base is applied.
As shown in FIG. 2, two types of splices, a conventional splicing method, a bad splice 14 (case 1) and a sawtooth splice 15 (case 2) are applied to the web, and the ultrasonic splice 16 ( Case 3) was applied, and bead application was performed while changing the web transport speed, and the occurrence of streaks and bubbles was compared and investigated.
なお、前記ケース１とケース２のスプライステープと
しては、共に厚さ50μｍの銀マットテープを用いた。ま
た、ケース３の超音波スプライスは、ベースラップ長を
2mmとし、超音波ホーンにより溶着速度10mm/sec、溶着
荷重750gとして溶着を行い、前部段差FGは20μｍであっ
た。Note that a silver mat tape having a thickness of 50 μm was used as a splice tape for the cases 1 and 2. In addition, the ultrasonic splice of case 3 has a base wrap length of
Welding was performed with an ultrasonic horn at a welding speed of 10 mm / sec and a welding load of 750 g, and the front step FG was 20 μm.
一方、塗布条件としては、ビードギャップを300μ
ｍ、塗布膜厚100μｍ、減圧チャンバーの減圧を40mmAq
とし、ウェブ搬送速度を50〜200m/minの間で種々変化さ
せた。On the other hand, bead gap was set to 300μ
m, coating film thickness 100μm, decompression of decompression chamber 40mmAq
The web transport speed was variously changed between 50 and 200 m / min.
第１表に前記試験結果について示す。 Table 1 shows the test results.
第１表より明らかなように、本発明ウェブ接合法によ
れば、搬送速度にかかわらず、スジ等のコーティング変
動が見られず、良好な塗布面を得ることができた。さら
に、本発明法は、塗布速度が100m/分以上であるとき、
特に本発明の効果が顕著に現れることが判明した。 As is clear from Table 1, according to the web joining method of the present invention, regardless of the transport speed, coating fluctuations such as streaks were not observed, and a good coated surface could be obtained. Further, the method of the present invention, when the coating speed is 100 m / min or more,
In particular, it has been found that the effects of the present invention are remarkably exhibited.
（実施例２） 実施例２においては、超音波接合部のウェブ両側部に
設けられた引裂補強材の効果について試験を行った。(Example 2) In Example 2, a test was performed on the effect of the tear reinforcing material provided on both sides of the web of the ultrasonic bonding portion.
試験は、実施例１におけるケース１のようにセルロー
ストリアセテート同士のみの超音波接合を行った場合
（ケースＡ）と、ケースＡのセルローストリアセテート
同士の超音波整合後に非塗布面側（裏側全体）に厚さ50
μｍの銀マットテープを接着した場合（ケースＢ）と、
第２図（ｂ）に示されるように、ケースＡのセルロース
トリアセテート同士の超音波接合時にウェブ両側部に厚
さ50μｍの銀マットテープを接着した場合（ケースＣ）
と、ウェブ両側部にポリエチレンテレフタレートを同時
溶着した場合（ケースＤ）の４種類について引裂強度試
験を行うとともに、ガイドロールへのノリはみ出しの有
無について試験を行った。なお、超音波溶着条件として
は実施例１に準じて行った。In the test, the ultrasonic bonding of only cellulose triacetates was performed as in Case 1 in Example 1 (Case A), and on the non-coated surface side (entire back side) after ultrasonic alignment of the cellulose triacetates in Case A. Thickness 50
μm silver matte tape (case B)
As shown in FIG. 2 (b), a case in which a silver mat tape having a thickness of 50 μm is adhered to both sides of the web at the time of ultrasonic bonding of cellulose triacetates in case A (case C)
In addition, a tear strength test was performed on four types of cases where polyethylene terephthalate was simultaneously welded to both sides of the web (Case D), and a test was performed to determine whether or not sticking to the guide roll had occurred. The ultrasonic welding conditions were the same as in Example 1.
第２表に前記試験結果を示す。 Table 2 shows the test results.
第２表より明らかとなるように、超音波接合部のウェ
ブ両側部に引裂補強材を設けた本発明法に係るケースＣ
およびケースＤの場合には、引裂強度およびノリの付着
状況ともに良好であることが判明される。 As is apparent from Table 2, Case C according to the present invention in which a tear reinforcing material is provided on both sides of the web of the ultrasonic bonding portion.
In the case of Case D, it was found that both the tear strength and the adhesion state of the glue were good.
以上詳説のとおり、本発明によれば、超音波スプライ
スを採用することにより、ノリのはみ出しによるガイド
ロールのプレッシャー故障を無くすとともに、スプライ
ス方法および形状の特定により、接合部後端部の段差を
無くし、これに伴うスジ・泡等の塗布故障を防止するこ
とができる。また、ウェブ両側部に引裂補強材を設ける
ことにより、塗布中のウェブ切断を防止できる。As described in detail above, according to the present invention, by employing an ultrasonic splice, pressure failure of the guide roll due to sticking out of the glue is eliminated, and by specifying the splice method and shape, the step at the rear end of the joint is eliminated. Accordingly, it is possible to prevent coating failure such as streaks and bubbles. Further, by providing the tear reinforcing material on both sides of the web, it is possible to prevent the web from being cut during application.
【図面の簡単な説明】 第１図（ａ）〜（ｃ）は本発明に係る超音波接合法を説
明するための図、第１図（ｄ）は本発明に係る超音波接
合法の溶融部拡大図、第２図（ａ）〜（ｅ）は本発明に
係る引裂補強材形状の具体例を示す図、第３図は本発明
に係るウェブ接合部の平面図、第４図〜第６図は本発明
法において採用し得るホーンの横断面図、第７図はスラ
イドビード塗布装置を示す図、第８図（ａ）（ｂ）は本
実施例における試験要領を説明するための図、第９図〜
第10図は従来の超音波接合法を示す図、第11図（ａ）
（ｂ）は従来の超音波接合法における問題点を説明する
ための図、第12図は本発明法の他の例の概要図である。 １……中空ドラム、３……ウェブ、５……塗布装置、７
……減圧チャンバー、10……超音波ホーンBRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 (a) to 1 (c) are views for explaining an ultrasonic bonding method according to the present invention, and FIG. 1 (d) is a melting method of the ultrasonic bonding method according to the present invention. 2 (a) to 2 (e) are views showing a specific example of the shape of the tear reinforcing material according to the present invention, FIG. 3 is a plan view of a web joining portion according to the present invention, FIG. 4 to FIG. 6 is a cross-sectional view of a horn that can be employed in the method of the present invention, FIG. 7 is a diagram showing a slide bead coating device, and FIGS. 8 (a) and 8 (b) are diagrams for explaining a test procedure in this embodiment. , FIG. 9 ~
FIG. 10 is a view showing a conventional ultrasonic bonding method, and FIG. 11 (a).
(B) is a diagram for explaining a problem in the conventional ultrasonic bonding method, and FIG. 12 is a schematic diagram of another example of the method of the present invention. 1 ... hollow drum, 3 ... web, 5 ... coating device, 7
…… Decompression chamber, 10… Ultrasonic horn
Claims (1)
に続く次行ウェブの先端部とを重ね合わせ、この重ね合
わせ部に超音波ホーンのチップ部分を接触させて超音波
振動を与えることにより、ウェブ同士を溶着接合させる
に当たり、 前記重ね合わせによる表裏段部の少なくとも一方を跨い
で超音波ホーンのチップ部分を接触させウェブの溶融を
行いながら溶着接合するとともに、超音波ホーンのチッ
プ部分の接触が前記段部の一方のみであるとき、塗布面
をその一方の段部側としかつウェブの搬送方向を当初の
段差面が進行方向に向かうようにし、超音波ホーンのチ
ップ部分の接触面が前記重ね合わせ代全体をカバーする
とき、ウェブの搬送方向および塗布面を当初の段差面が
進行方向に向かう方向およびその段差面側とする条件の
下で塗布面を表裏任意とし、さらにウェブ両側部の非塗
布領域に両ウェブを跨いで引裂補強材を設けることを特
徴とするウェブの接合方法。An ultrasonic vibration is applied by bringing a rear end portion of a preceding web continuously conveyed and a front end portion of a succeeding web following the superposed portion into contact with a tip portion of an ultrasonic horn. By doing so, in welding and joining the webs, the ultrasonic horn tip portion is brought into contact with the ultrasonic horn tip portion while contacting the tip portion of the ultrasonic horn across at least one of the front and back steps by the superimposition and melting the web. When only one of the steps is in contact with the stepped portion, the application surface is set to the one stepped side, and the web is transported in such a manner that the initial stepped surface is directed to the traveling direction, and the contact surface of the ultrasonic horn tip portion. When covering the entire overlap margin, coating is performed under the condition that the web transport direction and the application surface are set to the direction in which the initial step surface is directed to the traveling direction and the step surface side. A method of joining webs, wherein the cloth surface is arbitrary, and a tear-reinforcing material is provided across the two webs in non-application regions on both sides of the web.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26532490A JP2745338B2 (en) | 1990-10-03 | 1990-10-03 | Web joining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26532490A JP2745338B2 (en) | 1990-10-03 | 1990-10-03 | Web joining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04144869A JPH04144869A (en) | 1992-05-19 |
| JP2745338B2 true JP2745338B2 (en) | 1998-04-28 |
Family
ID=17415609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26532490A Expired - Lifetime JP2745338B2 (en) | 1990-10-03 | 1990-10-03 | Web joining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2745338B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102209513A (en) * | 2008-11-11 | 2011-10-05 | 尤妮佳股份有限公司 | Method of manufacturing absorptive article |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200409405A (en) * | 2002-07-30 | 2004-06-01 | Hitachi Chemical Co Ltd | Adhesive material tape, method of connecting, producing, and press-connecting the tape, adhesive material reel, adhering device, adhesive agent-tape cassette, method of press-conducting adhesive agent using same, and anisotropic electroconductive tape |
-
1990
- 1990-10-03 JP JP26532490A patent/JP2745338B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102209513A (en) * | 2008-11-11 | 2011-10-05 | 尤妮佳股份有限公司 | Method of manufacturing absorptive article |
| CN102209513B (en) * | 2008-11-11 | 2013-09-25 | 尤妮佳股份有限公司 | Method of manufacturing absorptive article |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04144869A (en) | 1992-05-19 |
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