JP4051598B2

JP4051598B2 - Stretch self-adhesive interlining and bonding method

Info

Publication number: JP4051598B2
Application number: JP2001320739A
Authority: JP
Inventors: 良司中村
Original assignee: Toyobo Co Ltd
Current assignee: Toyobo Co Ltd
Priority date: 2001-10-18
Filing date: 2001-10-18
Publication date: 2008-02-27
Anticipated expiration: 2021-10-18
Also published as: JP2003129317A

Description

【０００１】
【発明の属する技術分野】
本発明は他の接着剤を用いる事なく、接着可能で接着後も伸長性、回復性に優れ、風合いが硬化しないストレッチ性自己接着芯地に関する。
【０００２】
【従来の技術】
被覆副素材である芯地として不織布、織り編み物が用いられており、表地の多様化に対応して様々な改善が加えられてきた。ストレッチ性も表地特性として重要な要件であり、種々の織り編み物が開発されてきた。芯地は表地とのなじみが良いことが必要要件であり、表地のストレッチ化に伴い、芯地にもストレッチ性能が要求されてきた。これに対応すべく特開昭６０−４５６３６号公報や特開平０９−３２４３３９号公報に見られる様な複合紡績弾性糸を用いる提案や、特開昭６２−９７９３７号公報に見られる仮撚加工糸を用いる方法、または特開平０７−４２０４２号公報のようなコンジュゲートの利用、特開平０３−２９４５０３号公報や特開平１１−２００１２４号公報のように繊維そのものに弾性のあるポリブチレンテレフタレ−トやポリトリメチレンテレフタレ−トを用いる提案もある。しかしいずれの方法も表地との接着にはポリエステル系またはポリアミド系またはポリエチレン系の接着剤が必要であり、接着強度と伸縮性能の両立には難しい条件設定が必要であり、時には風合い硬化をする問題もあった。特に表地の薄地化にともなう接着樹脂の表地への滲みだしの問題も大きな課題となっている。
【０００３】
芯地を構成する糸そのものに接着性能を持つ繊維を用いる考え方より特開昭６１−１９４２２１号公報には低融点ポリオレフィンを弾性糸に巻き付けた複合糸の提案がある。しかしこの方法では接着性能はもつものの、伸縮性能が阻害されることが明らかである。
【０００４】
また特開平０９−２１０３３号公報には低融点のポリエステルエラストマーを融着成分として用い、糸内及び糸間を融着して芯地の曲げ剛性を高める方法が提案されているが、糸そのものを融着せしめるため、ソフト風合いの維持や伸長性能の確保には適していない。同思想として特開平０４−３１６６２９号公報もあるが結果は同じであり、エラストマーの伸縮性能は活かされていない。
【０００５】
【発明が解決しようとする課題】
本発明は上記の現状に鑑み、接着性能に優れ、かつ接着後も充分に伸縮性能に優れ、風合いが硬化しない芯地を提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
本発明は、上記目的を達成するものであり、つぎの構成を有するものである。
１．熱可塑性ポリウレタン弾性糸を１５重量％以上含み、該弾性糸の被覆率が２０％未満である複合糸を少なくとも２０重量％含むことを特徴とするストレッチ性自己接着芯地。
２．複合糸の複合形態が撚糸またはカバリング糸またはエアー交絡糸であることを特徴とする第１記載のストレッチ性自己接着芯地。
３．熱可塑性ポリウレタン弾性糸の融点が２００℃未満であることを特徴とする第１記載のストレッチ性自己接着芯地。
４．融点が２００℃未満である熱可塑性ポリウレタン弾性糸を含む芯地を該融点より少なくとも１０℃低い温度で圧着することを特徴とするストレッチ性自己接着芯地の接着方法。
【０００７】
以下に本発明を詳細に説明する。本発明で最も重要なことは、構成糸の表面に熱可塑性ポリウレタン弾性糸が露出していることと、接着後にポリウレタンと他の複合繊維が自由に変形に追従して移動可能なことにある。このため第一の要件として被覆率が２０％未満である必要がある。このことは芯地と表地の接着がポリウレタン弾性糸と表地が複合糸の他成分を介することが少なく接着することを意味し、接着後の伸長性能を維持する上で重要となる。２０％以上のなると、接着面に複合糸の他繊維が拘束され伸縮性能が低下する。被覆率は低い方が発明の目的から好ましいが芯地形成時の糸の取扱性から２％以上がより好ましい。ここで被覆率とは接着時点のポリウレタン弾性糸が複合糸構成他繊維で覆われているいる比率を示し、本発明では撚糸、カバーリング糸の場合は（１）式で、交絡糸の場合は（２）式で表示する。
【０００８】
１２Ｄ×１０^-3×Ｔ×１００／｛１０００×ＤＦ×（Ｐ＋Ｆ）／２｝（式１）
ここでＤは複合糸のウレタン以外の構成繊維の総繊度を、Ｔは撚糸時の撚り数（T/m) またはカバーリング数(T/m) 但し、ダブルカバーリング糸の場合は上下撚り数の和を、ＤＦは撚糸またはカバーリング時のポリウレタン弾性糸のドラフト率を、Ｐはセット後の縦伸張率を、Ｆは同幅だし率を示す。但し織物で経糸使いのみの場合はＦ＝Ｐ、緯糸使いのみの場合はＰ＝Ｆとする。
【０００９】
（Ｋ×l ／１０００）×１００（式２）
ここでＫは芯地構成複合糸の１ｍあたりの交絡数（個／ｍ）を、l は平均交絡長(mm) を示す。
【００１０】
複合糸中の熱可塑性ポリウレタン弾性糸は所望の接着強度より適宜設定できるが１５重量％未満では充分な接着性能が得られない。逆に熱可塑性ポリウレタン弾性糸の量が多い場合、接着の面では問題がないが、布帛製造過程の取扱性から５０％以下にすることが好ましい。芯地中の複合糸の構成割合は接着性と芯地として要求される伸縮性の観点で設定されるが２０重量％未満になると伸縮性能、特に伸長回復性が低下し、目的を達し得ない。多くなることは表地との接着後の伸長応力の要求上限を越えない限り問題はないが、芯地としての価格対応から６０％が上限と考えられる。
【００１１】
本発明に用いる複合糸は交撚糸、カバリング糸、エアー交絡糸で作られた熱可塑性ポリウレタン弾性糸が適度に露出しており他成分との自由度があること好ましく、特に芯鞘複合紡績糸や、サイドバイサイドや芯鞘複合繊維は好ましくない。
【００１２】
本発明の芯地の他の要点として熱可塑性ポリウレタン糸を線形を保った状態で接着することにあり、接着条件は溶断する以前で軟化点以降で圧着する必要があり、融点より２０℃から１０℃低い温度で接着するこが肝要である。この時の温度が表地の風合いを損ねると問題になり、このため、熱可塑性ポリウレタンの融点は２００℃以下とする必要がある。また該融点の下限は１２０℃以上であることがこのましい。これ以上になるとアイロン掛けや高温洗濯等の取扱上の問題が生ずるためである。
【００１３】
また前述のように、接着手段として圧着方法を用いるため、加圧時に複合糸に圧力が集中することが、接着と芯地全体の偏平化を防止する上で複合糸の糸径を他の糸径よりも太くすることが好ましく、糸径比が１．２以上とすることが好ましい。
【００１４】
本発明の芯地は織物であっても編み物であっても良いし、芯地を構成する複合糸以外の糸は伸縮性のある糸であれば特に限定するものではないが、取扱易さやコストの面からポリエステル系またはナイロン系の仮撚加工糸が好ましい。また複合糸の熱可塑性ウレタン糸との複合相手も同様に理由から、ポリエステル系またはナイロン系の仮撚加工糸が好ましい。
【００１５】
以下、本発明を実施例により詳細に説明する。なお、特性値の測定方法は次の通りである。
（接着強力）
ＪＩＳＬ１０８６に準じて実施する。すなわち２．５ｃｍ×１５ｃｍの試料をたて、よこ又コース方向、ウエール方向に各５枚採取し、長辺方向に５ｃｍ剥離し、つかみ間隔を５ｃｍとして引張試験機に取り付け、１０ｃｍ／分の引張速度で５ｃｍ間剥離し、応力カーブより応力の大きい値を３個、小さい値を３個採取し、６個の平均値として２．５ｃｍ当たりの強力とした。
【００１６】
（伸長及び回復特性の測定）
ＫＥＳ（Kawabata's Evaluation System) の引張り特性( 繊維機械学会編風合い評価の標準化と解析第２版第４章２−１記載）に準じて測定した。すなわち、長さ５ｃｍ、幅２０ｃｍの試料をひずみ速度 4.00 ×10^-3／ｓｅｃの定速で５００ｇｆ／ｃｍの最大荷重まで引張り、変形回復過程に移り、応力−ひずみ曲線よし最大荷重時のひずみを伸長率とし、回復過程の０応力到達時のひずみを残留ひずみとした。この測定では織編物の縦方向の測定をして代表値とした。
【００１７】
（融点）
示唆走査熱量計（パーキンエルマー社製ＤＳＣ−２型）を用いて、昇温速度２０℃／分で測定し、現れる２つのピークの内、高温側のピークを融点とした。
【００１８】
（接着テスト用の表地）
イソフタル酸を１０モル％共重合したポリエステルに平均分子量が２０，０００のポリエチレングリコールを９重量％ブレンドしたポリマーを紡糸、延伸して５５デシテックス２４フィラメントの易溶出糸を得た。この糸と常法により得たポリエステルフィラメント糸５５デシテックス２４フィラメントの三角断面形状糸を引き揃え２５００Ｔ／ｍのＳ撚りとＺ撚りの強撚糸を作り、各々８５℃の湿熱で４０分処理して、撚りセットを実施した。この糸を経糸及び緯糸にＳ，Ｚ２本交互に配し、梨地組織で経糸密度１３５本／in，緯糸密度８２本に織り上げた。通常の精練、プレセット後、６０ｇ／l のカセイソーダー溶液で９５℃で処理し、５５％減量加工をした。染色した後、ファイナルセットして経糸密度１９２本／in緯糸密度９３本の布帛を得た。この布を電子顕微鏡で５００倍に拡大して観察した結果、通常のポリエステルフィラメント糸が３次元にコイル構造をなし、易溶出糸は完全に溶出されていた。この布の伸長及び回復特性の測定結果を第一表に示した。
この布を実施例及び比較例の表地として用いた。
【００１９】
【実施例】
（実施例−１）
融点が１７１℃で２２デシテックスの熱可塑性ポリウレタンに通常のポリエステル仮撚り１段加工糸３３デシテックス１８フィラメントを８００Ｔ／ｍでＺ方向に巻き付け、シングルカバリング糸を得た。この時熱可塑性ポリウレタンは２．５倍に伸長して供給した。このカバリング糸と通常のポリエステル仮撚り１段加工糸３３デシテックス１８フィラメントを１本交互に経糸に配し、緯糸には通常の仮撚り１段加工糸３３デシテックス１８フィラメントを用い、平織組織の織物とした。この時、カバリング糸は２．５倍に伸長して供給した。この布を通常工程で精練、プレセットを実施した。プレセットは幅は有り幅、縦方向には精練上がり布を２倍引っ張る条件で１４０℃で３０秒処理し、この時の縦方向のセット率は８０％であった。結果的にはカバリング糸はカバリング時の糸長の６４％、すなわち、縦伸長率０．６４でセットした。得られた芯地の経糸密度は８５本／in、緯糸密度は６５本／inであった。この芯地の伸長及び回復特性の測定結果を第一表に示した。この芯地と接着テスト用の表地を重ね、フラット型プレス機（アサヒＮＡＰ５０２）で１６０℃、圧力３．５Ｋｇで３０秒処理して接着した。この試料の接着強力の測定結果と伸長及び回復特性の測定結果も第一表に示した。接着強力も伸長及び回復特性も優れた性能をしめした。風合いの硬化もまったくみられなかった。
【００２０】
（実施例−２）
融点が１７１℃で２２デシテックスの熱可塑性ポリウレタンを２．５倍に伸長した糸と通常のポリエステル仮撚り１段加工糸３３デシテックス１８フィラメントをエアー圧２．５Ｋｇ／cm²でエアー交絡させ、平均交絡長が２．８ｍｍで交絡数が３２個／ｍのエアーカバリング糸を得た。この糸と通常のポリエステル仮撚り１段加工糸５５デシテックス２４フィラメントを１コース毎に配し、３２ゲージのシンカー台丸機で天竺組織の丸編み地として精練、セットして編み物芯地を得た。この編み地の密度は５０コース／in、２８ウエール／inであった。以下、接着およびその試料の評価は実施例−１と同様に行い第一表に示した。接着強力も伸長及び回復特性も優れた性能をしめし、ソフトな風合いを保っていた。
【００２１】
（比較例−１）
芯地としてポリエステル仮撚加工糸３３デシテックス１８フィラメントが１００％で経糸密度が８５本／in、緯糸密度が６５本／inであり、片面のポリアミド系の接着樹脂を１４０ポイント／cm²ドットプリントした芯地を用いた以外は実施例−１と全く同じ条件で評価した。その結果を第一表に示した。明らかに表地の伸長回復性能が悪くなった。また僅かではあるが接着樹脂の表地への滲み出しが見られ、部分的に光沢斑を示した。風合いも若干固く感じられた。
【００２２】
（比較例−２）
エアー交絡条件をアエー圧４．５Ｋｇ／cm²とし、交絡数を５２個／ｍ、平均交絡長を４．８ｍｍとした以外は実施例−２と全く同法で評価した。その結果を第一表に示した。接着性能が劣り、布の伸長時に接着剥離が認められ、伸長及び回復特性は評価に値しないと判断した。
【００２３】
（比較例−３）
熱可塑性ポリウレタンの繊度を１１デシテックスとした以外は実施例−１と全く同じ条件で芯地を作成し、評価した。その結果を第一表に示した。接着性能が劣り、実用に耐えない芯地でっしかなかった。
【００２４】
（比較例−４）
熱可塑性ポリウレタン糸を含むカバリング糸の経糸を１／４とした以外は実施例−１と全く同じ条件で芯地を作成し、評価した。その結果を第一表に示した。接着性能が劣り、実用に耐えない芯地でっしかなかった。
【００２５】
（比較例−５）
接着時のプレス温度を１８０℃とする以外は実施例−１と全く同じ条件で芯地を作成し、評価した。その結果を第一表に示した。充分な接着性能は得られたものの弾性回復性能に著しい低下が見られた。この試料を走査型電子顕微鏡で観察したところ、熱可塑性ポリウレタンが溶断し、線形を保っていなかった。
【００２６】
【表１】

【００２７】
【発明の効果】
本発明の芯地は接着樹脂のドットプリント処理が必要なく、接着剤の表地への滲み出しがまったくない、自己接着型の芯地であり、風合いの硬化もなく、かつ表地の伸長回復性を阻害しない、場合によっては性能を高める芯地である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stretch self-adhesive interlining that can be bonded without using any other adhesive, is excellent in extensibility and recoverability after bonding, and does not harden the texture.
[0002]
[Prior art]
Nonwoven fabrics and knitted fabrics are used as the interlining material, which is a secondary coating material, and various improvements have been made in response to the diversification of the outer material. Stretchability is also an important requirement as a surface material characteristic, and various woven and knitted fabrics have been developed. The interlining is required to be familiar with the outer material, and with the stretch of the outer material, the interlining has also been required to have stretch performance. In order to cope with this, proposals using composite spun elastic yarns such as those disclosed in JP-A-60-45636 and JP-A-09-324339, and false twisted yarns disclosed in JP-A-62-97937 are disclosed. Or use of a conjugate as disclosed in JP 07-42042, or polybutylene terephthalate having elasticity in the fiber itself as disclosed in JP 03-294503 A or JP 11-200124 A There are also proposals using polytrimethylene terephthalate. However, both methods require polyester, polyamide, or polyethylene adhesives for adhesion to the outer material, and difficult conditions must be set to achieve both adhesive strength and stretchability. There was also. In particular, the problem of bleeding into the surface of the adhesive resin due to the thinning of the surface is also a major issue.
[0003]
Japanese Laid-Open Patent Publication No. 61-194221 proposes a composite yarn in which a low melting point polyolefin is wound around an elastic yarn, based on the idea of using fibers having adhesive performance for the yarn itself constituting the interlining. However, although this method has adhesion performance, it is clear that stretch performance is hindered.
[0004]
Japanese Patent Application Laid-Open No. 09-21033 proposes a method of increasing the bending rigidity of the interlining by using a low melting point polyester elastomer as a fusion component and fusing the yarn inside and between the yarns. Because it is fused, it is not suitable for maintaining a soft texture and securing elongation performance. There is also Japanese Patent Laid-Open No. 04-316629 as the same idea, but the result is the same, and the expansion / contraction performance of the elastomer is not utilized.
[0005]
[Problems to be solved by the invention]
In view of the above-mentioned present situation, the present invention has an object to provide an interlining that is excellent in adhesion performance and sufficiently excellent in expansion / contraction performance after adhesion and in which the texture is not cured.
[0006]
[Means for Solving the Problems]
The present invention achieves the above object and has the following configuration.
1. A stretchable self-adhesive core comprising 15% by weight or more of a thermoplastic polyurethane elastic yarn and at least 20% by weight of a composite yarn having a coverage of the elastic yarn of less than 20%.
2. The stretchable self-adhesive interlining according to claim 1, wherein the composite form of the composite yarn is a twisted yarn, a covering yarn or an air entangled yarn.
3. The stretchable self-adhesive interlining according to claim 1, wherein the thermoplastic polyurethane elastic yarn has a melting point of less than 200 ° C.
4). A method for adhering a stretchable self-adhesive interlining, characterized in that a intercombination comprising a thermoplastic polyurethane elastic yarn having a melting point of less than 200 ° C is crimped at a temperature at least 10 ° C lower than the melting point.
[0007]
The present invention is described in detail below. The most important thing in the present invention is that the thermoplastic polyurethane elastic yarn is exposed on the surface of the constituent yarn and that the polyurethane and other composite fibers can freely follow the deformation and move after bonding. Therefore, the first requirement is that the coverage is less than 20%. This means that the adhesion between the interlining and the outer surface is bonded with the polyurethane elastic yarn and the outer surface being less likely to pass through other components of the composite yarn, and is important in maintaining the elongation performance after the bonding. If it is 20% or more, other fibers of the composite yarn are constrained on the bonding surface, and the expansion / contraction performance is lowered. A lower coverage is preferable for the purpose of the invention, but 2% or more is more preferable from the viewpoint of handling of the yarn when forming the interlining. Here, the covering ratio indicates the ratio of the polyurethane elastic yarn at the time of adhesion covered with the composite yarn constituting other fibers. In the present invention, the twisted yarn and the covering yarn are represented by the formula (1). Displayed by equation (2).
[0008]
12D × 10 ⁻³ × T × 100 / {1000 × DF × (P + F) / 2} (Formula 1)
Here, D is the total fineness of the constituent fibers other than urethane of the composite yarn, T is the number of twists during twisting (T / m) or the number of coverings (T / m). DF represents the draft rate of the polyurethane elastic yarn at the time of twisting or covering, P represents the longitudinal elongation rate after setting, and F represents the same width-developing rate. However, F = P is used when using only warp in a woven fabric, and P = F when using only weft.
[0009]
(K × l / 1000) × 100 (Formula 2)
Here, K is the number of entanglements per 1 m of the interlining composite yarn (pieces / m), and l is the average entanglement length (mm).
[0010]
The thermoplastic polyurethane elastic yarn in the composite yarn can be appropriately set based on the desired adhesive strength, but if it is less than 15% by weight, sufficient adhesive performance cannot be obtained. On the contrary, when the amount of the thermoplastic polyurethane elastic yarn is large, there is no problem in terms of adhesion, but it is preferably 50% or less from the viewpoint of handling in the fabric production process. The composition ratio of the composite yarn in the interlining is set from the viewpoint of adhesiveness and the stretchability required for the interlining, but if it is less than 20% by weight, the stretchability, particularly the stretch recovery property is lowered and the purpose cannot be achieved. . The increase is not a problem as long as it does not exceed the required upper limit of the elongation stress after bonding to the outer material, but 60% is considered to be the upper limit from the price support as the interlining.
[0011]
The composite yarn used in the present invention is preferably a thermoplastic polyurethane elastic yarn made of a twisted yarn, a covering yarn, and an air entangled yarn that is appropriately exposed and has a degree of freedom from other components, particularly a core-sheath composite spun yarn and Side-by-side and core-sheath composite fibers are not preferred.
[0012]
Another important point of the interlining of the present invention is that the thermoplastic polyurethane yarn is bonded in a linear state, and the bonding condition is that the bonding must be performed after the softening point before fusing. It is important to bond at a low temperature. If the temperature at this time impairs the texture of the outer surface, it becomes a problem. For this reason, the melting point of the thermoplastic polyurethane needs to be 200 ° C. or less. The lower limit of the melting point is preferably 120 ° C. or higher. This is because if it exceeds this, problems in handling such as ironing and high-temperature washing occur.
[0013]
In addition, as described above, since the pressure bonding method is used as the bonding means, the pressure is concentrated on the composite yarn during pressurization, so that the diameter of the composite yarn can be reduced to other yarns in order to prevent adhesion and flattening of the entire interlining. The diameter is preferably larger than the diameter, and the yarn diameter ratio is preferably 1.2 or more.
[0014]
The interlining of the present invention may be woven or knitted, and the yarn other than the composite yarn constituting the interlining is not particularly limited as long as it is a stretchable yarn. From this aspect, a polyester-based or nylon-based false twisted yarn is preferable. Also, for the same reason, the composite partner of the composite yarn with the thermoplastic urethane yarn is preferably a polyester-based or nylon-based false twisted yarn.
[0015]
Hereinafter, the present invention will be described in detail with reference to examples. The characteristic value measurement method is as follows.
(Adhesive strength)
Carried out according to JIS L 1086. In other words, a sample of 2.5 cm × 15 cm is prepared, 5 samples are taken in the course direction and the wale direction, peeled 5 cm in the long side direction, attached to a tensile tester with a grip interval of 5 cm, and pulled at 10 cm / min. Peeling was performed at a rate of 5 cm, and three values having a larger stress than that of the stress curve and three values having a smaller value than the stress curve were sampled, and the average value of six was determined as the strength per 2.5 cm.
[0016]
(Measurement of elongation and recovery characteristics)
Measurement was performed according to the tensile properties of KES (Kawabata's Evaluation System) (standardization and analysis of texture evaluation, edited by the Textile Machinery Society, 2nd edition, Chapter 4, 2-1). That is, a sample having a length of 5 cm and a width of 20 cm is pulled to a maximum load of 500 gf / cm at a constant speed of strain rate 4.00 × 10 ⁻³ / sec, and the process proceeds to the deformation recovery process. The strain at the time of reaching zero stress in the recovery process was defined as the residual strain. In this measurement, the longitudinal direction of the woven or knitted fabric was measured and used as a representative value.
[0017]
(Melting point)
Using an suggestive scanning calorimeter (DSC-2 manufactured by Perkin Elmer Co., Ltd.), the temperature was increased at a rate of temperature increase of 20 ° C./min. Among the two peaks that appeared, the peak on the high temperature side was defined as the melting point.
[0018]
(Outer surface for adhesion test)
A polymer obtained by blending 9% by weight of polyethylene glycol having an average molecular weight of 20,000 with polyester obtained by copolymerizing 10% by mole of isophthalic acid was spun and stretched to obtain an easily eluting yarn of 55 dtex 24 filaments. This yarn and a polyester filament yarn 55 dtex 24 filament obtained by a conventional method are arranged in a triangular cross-sectional shape to make a 2500 T / m S twist and a Z twist strong twist yarn, each treated with wet heat at 85 ° C. for 40 minutes, A twist set was carried out. Two S and Z yarns were alternately arranged on the warp and the weft, and the yarn was woven to a warp density of 135 / in and a weft density of 82 in the satin texture. After normal scouring and presetting, it was treated with a caustic soda solution of 60 g / l at 95 ° C. to reduce the weight by 55%. After dyeing, final setting was performed to obtain a fabric having a warp density of 192 yarns / in weft density of 93 pieces. As a result of observing this cloth by magnifying it 500 times with an electron microscope, a normal polyester filament yarn has a three-dimensional coil structure, and the easy-eluting yarn was completely eluted. The measurement results of the stretch and recovery properties of this fabric are shown in Table 1.
This cloth was used as a surface material for Examples and Comparative Examples.
[0019]
【Example】
(Example-1)
A normal polyester false twisted one-stage processed yarn 33 dtex 18 filament was wound around the thermoplastic polyurethane having a melting point of 171 ° C. and 22 dtex in the Z direction at 800 T / m to obtain a single covering yarn. At this time, the thermoplastic polyurethane was supplied by extending 2.5 times. This covering yarn and normal polyester false twisted single step processed yarn 33 dtex 18 filaments are alternately arranged on the warp yarn, and weft yarn is used as normal false twisted single step processed yarn 33 dtex 18 filament, did. At this time, the covering yarn was stretched 2.5 times and supplied. This cloth was scoured and pre-set in a normal process. The pre-set had a width, and was processed for 30 seconds at 140 ° C. under the condition that the scoured cloth was pulled twice in the vertical direction, and the set rate in the vertical direction at this time was 80%. As a result, the covering yarn was set at 64% of the yarn length at the time of covering, that is, the longitudinal elongation ratio was 0.64. The warp density of the obtained interlining was 85 / in and the weft density was 65 / in. The measurement results of the stretch and recovery characteristics of this interlining are shown in Table 1. The interlining and the outer surface for adhesion test were overlapped, and bonded by a flat press (Asahi NAP502) at 160 ° C. and a pressure of 3.5 kg for 30 seconds. The measurement results of the adhesive strength of this sample and the measurement results of the elongation and recovery properties are also shown in Table 1. Excellent adhesion strength and elongation and recovery properties. The texture was not cured at all.
[0020]
(Example-2)
An average entanglement of a yarn obtained by stretching 2.5 times of 22 decitex thermoplastic polyurethane at a melting point of 171 ° C. and a normal polyester false twisted one-stage processed yarn 33 decitex 18 filaments at an air pressure of 2.5 kg / cm ^2. An air covering yarn having a length of 2.8 mm and an entanglement number of 32 / m was obtained. This yarn and ordinary polyester false twisted one-stage processed yarn 55 dtex 24 filaments were arranged for each course, and scoured and set as a round knitted fabric with a 32 gauge sinker stand round machine to obtain a knitted interlining . The density of the knitted fabric was 50 courses / in and 28 wales / in. Hereinafter, adhesion and evaluation of the sample were performed in the same manner as in Example 1, and are shown in Table 1. Adhesive strength and elongation and recovery characteristics showed excellent performance, maintaining a soft texture.
[0021]
(Comparative Example-1)
As the interlining, polyester false twisted yarn 33 dtex 18 filament is 100%, warp density is 85 yarns / in, weft density is 65 yarns / in, and polyamide adhesive resin on one side is printed 140 dots / cm ² dots Evaluation was performed under exactly the same conditions as in Example 1 except that the interlining was used. The results are shown in Table 1. Obviously, the stretch recovery performance of the outer material deteriorated. Moreover, although the adhesive resin oozed out to the surface, it was slightly, and glossy spots were partially shown. The texture was also felt a little hard.
[0022]
(Comparative Example-2)
Evaluation was performed in exactly the same manner as in Example-2 except that the air entanglement conditions were an air pressure of 4.5 kg / cm ² , the number of entanglements was 52 / m, and the average entanglement length was 4.8 mm. The results are shown in Table 1. Adhesion performance was inferior, adhesive peeling was observed when the fabric was stretched, and it was judged that the stretch and recovery properties were not worthy of evaluation.
[0023]
(Comparative Example-3)
An interlining was prepared and evaluated under exactly the same conditions as in Example 1 except that the fineness of the thermoplastic polyurethane was 11 dtex. The results are shown in Table 1. Adhesive performance was inferior and it was only an interlining that could not withstand practical use.
[0024]
(Comparative Example-4)
An interlining was prepared and evaluated under exactly the same conditions as in Example 1 except that the warp of the covering yarn including the thermoplastic polyurethane yarn was ¼. The results are shown in Table 1. Adhesive performance was inferior and it was only an interlining that could not withstand practical use.
[0025]
(Comparative Example-5)
An interlining was prepared and evaluated under exactly the same conditions as in Example 1 except that the press temperature during bonding was 180 ° C. The results are shown in Table 1. Although sufficient adhesive performance was obtained, the elastic recovery performance was significantly reduced. When this sample was observed with a scanning electron microscope, the thermoplastic polyurethane was melted and the alignment was not maintained.
[0026]
[Table 1]

[0027]
【The invention's effect】
The interlining of the present invention is a self-adhesive interlining that does not require any adhesive resin dot print treatment, and no adhesive oozes onto the outer surface, has no texture hardening, and has a stretch recovery property on the outer surface. It is an interlining that does not impede and in some cases enhances performance.

Claims

A stretchable self-adhesive core comprising 15% by weight or more of a thermoplastic polyurethane elastic yarn and at least 20% by weight of a composite yarn having a coverage of the elastic yarn of less than 20%.

The stretchable self-adhesive interlining according to claim 1, wherein the composite form of the composite yarn is a twisted yarn, a covering yarn or an air entangled yarn.

The stretchable self-adhesive interlining according to claim 1, wherein the thermoplastic polyurethane elastic yarn has a melting point of less than 200 ° C.

A method for adhering a stretchable self-adhesive interlining, characterized in that a intercombination comprising a thermoplastic polyurethane elastic yarn having a melting point of less than 200 ° C is crimped at a temperature at least 10 ° C lower than the melting point.