JP2008007681A - Easily peelable nonwoven fabric and its production method - Google Patents
Easily peelable nonwoven fabric and its production method Download PDFInfo
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- JP2008007681A JP2008007681A JP2006180976A JP2006180976A JP2008007681A JP 2008007681 A JP2008007681 A JP 2008007681A JP 2006180976 A JP2006180976 A JP 2006180976A JP 2006180976 A JP2006180976 A JP 2006180976A JP 2008007681 A JP2008007681 A JP 2008007681A
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 80
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 21
- 239000000839 emulsion Substances 0.000 claims abstract description 14
- 239000012790 adhesive layer Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 16
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 15
- 239000010410 layer Substances 0.000 claims description 14
- 238000007646 gravure printing Methods 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- -1 polypropylene Polymers 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000000576 coating method Methods 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 8
- 239000000047 product Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000003522 acrylic cement Substances 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
本発明は、サニタリー用品等の粘着性部位を有する製品に用いられる易剥離性不織布及びその製造方法に関し、更に詳しくは、粘着性部位から剥離する際に発生する剥離音の改善された易剥離性不織布及びその製造方法に関する。 The present invention relates to an easily peelable nonwoven fabric used for products having an adhesive part such as sanitary goods and a method for producing the same, and more specifically, easy peelability with improved peeling sound generated when peeling from an adhesive part. It is related with a nonwoven fabric and its manufacturing method.
粘着性部位を持つ代表的な商品としては、生理用品、パンティライナー、オムツ等のサニタリー用品等があるが、これらを商品として包装する際に包装紙にくっついたり、使用する前の段階で包装紙等にくっついたりしないように、前記粘着性部位を適切な剥離素材でカバーすることが必要である。例えば、サニタリー用品は、通常、吸収体とこれを包む不織布あるいはドライメッシュシート、下着に固定する粘着テープからなるが、包装の段階や、使用するまでの段階では、この粘着テープが包装紙等に付着しないように粘着剤層表面をカバーする必要がある。このようなカバー材は、使用時まで粘着テープの粘着性能をできるだけ低下させることなく、且つ安定したカバー性能を発揮する必要がある。 Typical products with sticky parts include sanitary products such as sanitary products, panty liners, diapers, etc., but when these products are packaged as products, they are attached to the wrapping paper, or wrapping paper before use It is necessary to cover the adhesive part with an appropriate release material so that it does not stick to the surface. For example, sanitary products usually consist of an absorbent body and a non-woven fabric or dry mesh sheet that wraps the absorbent body, and an adhesive tape that is fixed to the undergarment. This adhesive tape is used as a wrapping paper at the packaging stage and before use. It is necessary to cover the surface of the pressure-sensitive adhesive layer so as not to adhere. Such a cover material needs to exhibit stable cover performance without reducing the adhesive performance of the adhesive tape as much as possible until use.
従来、この種のカバー材としては、紙やフィルムからなる基材を剥離剤で処理したものが広く用いられている。しかしながら、紙やフィルムを基材として用いたカバー材は、携行時や使用時にカサカサという音（以下、携行音と記す）をたてるため、特に女性には嫌われるという問題がある。 Conventionally, as this type of cover material, a substrate made of paper or a film treated with a release agent has been widely used. However, a cover material using paper or a film as a base material has a problem that it is particularly disliked by women because it makes a crumbling sound (hereinafter referred to as carrying sound) during carrying or use.
近時、パンティライナーの下着当接側シートに、該パンティライナーを下着に装着するための粘着材層を設け、この粘着材層にこれを保護するための離型紙を貼合し、この離型紙を包装紙として該パンティライナーを包装した個別包装体が提案されている（例えば、特許文献１参照）。
しかしながら、この場合も離型紙を包装紙として使用するため、携行音の問題は何ら解消されていない。
Recently, an adhesive material layer for attaching the panty liner to the underwear is provided on the underwear contact side sheet of the panty liner, and a release paper for protecting the adhesive layer is bonded to the adhesive material layer. An individual wrapping body in which the panty liner is packaged using wrapping paper has been proposed (see, for example, Patent Document 1).
However, since the release paper is used as the wrapping paper in this case as well, the problem of carrying sound is not solved at all.
この問題を解消するために、不織布にポリエチレンフィルムをラミネートし、これにシリコーン系剥離剤を塗布したカバー材が市販されている。
しかしながら、このカバー材もポリエチレンフィルムをラミネートしているため、携行音の問題は十分に解消されるとは云い難い。
In order to solve this problem, a cover material in which a polyethylene film is laminated on a nonwoven fabric and a silicone release agent is applied thereto is commercially available.
However, since this cover material is also laminated with a polyethylene film, the problem of carrying sound is hardly solved.
また、上記したカバー材そのものに起因する携行音の他に、カバー材を粘着剤層から剥離する際に生じるバリバリという剥離音も特に女性には嫌われるが、この問題も解消されているとは云い難い。
本発明は、かかる実情に鑑み、従来の上記問題を解消し、粘着テープの粘着性能を低下させることなく、優れた保護カバー性を維持しながら、携行音及び剥離音の改善された易剥離性不織布を提供するものである。 In view of such circumstances, the present invention eliminates the above-described problems and easily removes the carrying sound and peeling sound while maintaining excellent protective cover properties without reducing the adhesive performance of the adhesive tape. A nonwoven fabric is provided.
本発明者は、上記問題点を解決するために鋭意研究の結果、携行音についてはフィルムを使用せず不織布単体とすることにより解決でき、また、剥離音については、不織布への剥離剤の塗布方法が剥離音と密接な関係を有し、特定の塗布方法を採用し剥離強度を制御することによって上記問題点が解消されることを見い出し、本発明に到達した。 As a result of diligent research to solve the above problems, the present inventor can solve the problem of carrying sound by using a non-woven fabric alone without using a film, and for peeling sound, applying a release agent to the non-woven fabric. The method has a close relationship with the peeling sound, and it has been found that the above problems can be solved by adopting a specific coating method and controlling the peeling strength, and has reached the present invention.
即ち、本発明の請求項１は、不織布にシリコーンエマルジョン系剥離剤を塗布してなる剥離性不織布であって、粘着剤層に対する剥離強度が０．２５〜２．５ｇ／２０ｍｍであることを特徴とする易剥離性不織布を内容とする。 That is, claim 1 of the present invention is a peelable nonwoven fabric obtained by applying a silicone emulsion-based release agent to a nonwoven fabric, wherein the peel strength with respect to the adhesive layer is 0.25 to 2.5 g / 20 mm. The easy-release non-woven fabric is the content.
本発明の請求項２は、剥離強度が０．５〜２．０ｇ／２０ｍｍである請求項１記載の易剥離性不織布を内容とする。 Claim 2 of the present invention includes the easily peelable nonwoven fabric according to claim 1 having a peel strength of 0.5 to 2.0 g / 20 mm.
本発明の請求項３は、不織布がポリプロピレン樹脂製不織布である請求項１又は２記載の易剥離性不織布を内容とする。 Claim 3 of the present invention includes the easily peelable nonwoven fabric according to claim 1 or 2, wherein the nonwoven fabric is a polypropylene resin nonwoven fabric.
本発明の請求項４は、不織布がスパンボンド系不織布である請求項１〜３のいずれか１項に記載の易剥離性不織布を内容とする。 Claim 4 of the present invention contains the easily peelable nonwoven fabric according to any one of claims 1 to 3, wherein the nonwoven fabric is a spunbond nonwoven fabric.
本発明の請求項５は、サニタリー製品における粘着部位の粘着剤層のカバー材として用いられる請求項１〜４のいずれか１項に記載の易剥離製不織布を内容とする。 The fifth aspect of the present invention includes the easily peelable nonwoven fabric according to any one of the first to fourth aspects, which is used as a cover material for the pressure-sensitive adhesive layer of the pressure-sensitive adhesive part in a sanitary product.
本発明の請求項６は、不織布にシリコーンエマルジョン系剥離剤をグラビヤ印刷とスプレーによって塗布することをと特徴とする請求項１〜５のいずれか１項に記載の易剥離性不織布の製造方法を内容とする。 Claim 6 of the present invention is a method for producing an easily peelable nonwoven fabric according to any one of claims 1 to 5, characterized in that a silicone emulsion release agent is applied to the nonwoven fabric by gravure printing and spraying. Content.
本発明の請求項７は、不織布にシリコーンエマルジョン系剥離剤をグラビヤ印刷によって塗布した後スプレーによって塗布することをと特徴とする請求項１〜５のいずれか１項に記載の易剥離性不織布の製造方法を内容とする。 Claim 7 of the present invention is characterized in that the silicone emulsion release agent is applied to the nonwoven fabric by gravure printing and then applied by spraying. The easily peelable nonwoven fabric according to any one of claims 1 to 5 The manufacturing method is the content.
本発明は、不織布単体にシリコーンエマルジョン系剥離剤を塗布してなる剥離性不織布であって、粘着剤層に対する剥離強度が０．２５〜２．５ｇ／２０ｍｍの範囲、好ましくは０．５〜２．０ｇ／２０ｍｍの範囲としたことにより、粘着剤層の粘着性能を低下させることなく、優れた保護カバー性を維持しながら、携行音及び剥離音が改善された易剥離性不織布を提供することができる。 The present invention is a peelable nonwoven fabric obtained by applying a silicone emulsion release agent to a single nonwoven fabric, and the peel strength with respect to the pressure-sensitive adhesive layer is in the range of 0.25 to 2.5 g / 20 mm, preferably 0.5 to 2. To provide an easily peelable nonwoven fabric with improved carrying sound and peeling sound while maintaining excellent protective cover properties without deteriorating the pressure-sensitive adhesive performance of the pressure-sensitive adhesive layer by having a range of 0.0 g / 20 mm. Can do.
また、不織布がポリプロピレン樹脂製不織布からなる場合に、優れた柔軟性により剥離音がより改善された易剥離性不織布が提供され、更に、スパンボンド系不織布からなる場合に、一層優れた柔軟性により、剥離音が一層改善された易剥離性不織布が提供される。
本発明の易剥離性不織布は、特に携行音や剥離音が嫌われるサニタリー製品における粘着部位の粘着剤層のカバー材として好適である。
In addition, when the nonwoven fabric is made of polypropylene resin nonwoven fabric, an easily peelable nonwoven fabric having improved peeling sound due to excellent flexibility is provided. Further, when the nonwoven fabric is made of spunbonded nonwoven fabric, more excellent flexibility is provided. An easily peelable nonwoven fabric with further improved peeling sound is provided.
The easily peelable non-woven fabric of the present invention is particularly suitable as a cover material for the pressure-sensitive adhesive layer at the adhesive site in sanitary products where carrying sound and peeling sound are disliked.
本発明の易剥離性不織布は、不織布にシリコーンエマルジョン系剥離剤をグラビア印刷とスプレーによって塗布することにより、好ましくは、グラビア印刷によって塗布した後スプレーによって塗布することにより製造される。 The easily peelable nonwoven fabric of the present invention is produced by applying a silicone emulsion release agent to a nonwoven fabric by gravure printing and spraying, preferably by applying it by gravure printing and then applying it by spraying.
本発明の易剥離性不織布は、不織布にシリコーンエマルジョン系剥離剤を塗布してなる剥離性不織布であって、粘着テープの粘着剤層に対する剥離強度が０．２５〜２．５ｇ／２０ｍｍであることを特徴とする。 The easily peelable nonwoven fabric of the present invention is a peelable nonwoven fabric obtained by applying a silicone emulsion release agent to a nonwoven fabric, and the peel strength of the pressure-sensitive adhesive tape to the pressure-sensitive adhesive layer is 0.25 to 2.5 g / 20 mm. It is characterized by.
本発明で用いられる不織布としては、ポリプロピレン製不織布が好ましく、特に超高分子量ポリプロピレン製不織布が柔軟性に富み、これにより剥離音の小さい易剥離性不織布が得られる点で好ましい。高分子量ポリプロピレン製不織布は、例えば、はＳＭＳ２０ｇ／ｍ2 、１７ｇ／ｍ2 （三井化学株式会社製）として市販されている。不織布の目付けは、比較的小さいものが剥離音が小さいので好ましく、具体的には３０〜５ｇ／ｍ2 程度のものが好ましい。 As the nonwoven fabric used in the present invention, a polypropylene nonwoven fabric is preferable, and an ultrahigh molecular weight polypropylene nonwoven fabric is particularly preferable in that it has a high flexibility and an easily peelable nonwoven fabric with a small peeling sound can be obtained. High-molecular-weight polypropylene non-woven fabrics are commercially available, for example, as SMS 20 g / m 2 and 17 g / m 2 (Mitsui Chemicals). A nonwoven fabric having a relatively small basis weight is preferable because it has a small peeling sound, and specifically, a fabric weight of about 30 to 5 g / m 2 is preferable.
本発明に用いられるシリコーンエマルジョン系剥離剤としては、付加反応型シリコーンエマルジョンＫＭ−３９５１（信越化学工業株式会社製）、同ＳＭ３２００（ＧＥ東芝シリコーン株式会社製）等が挙げられる。固形分濃度は余り大きいと塗布が困難となり、余り小さいと塗布効果が小さくなる。従って、５〜１５重量％程度が好ましく、特に１０重量％程度が好ましい。 Examples of the silicone emulsion release agent used in the present invention include addition reaction type silicone emulsion KM-3951 (manufactured by Shin-Etsu Chemical Co., Ltd.) and SM3200 (manufactured by GE Toshiba Silicone Co., Ltd.). If the solid content concentration is too large, coating becomes difficult, and if it is too small, the coating effect becomes small. Therefore, about 5 to 15% by weight is preferable, and about 10% by weight is particularly preferable.
本発明の易剥離性不織布の粘着剤層に対する剥離強度は、０．２５〜２．５ｇ／２０ｍｍの範囲に調整される。剥離強度が０．２５ｇ／２０ｍｍ未満ではカバー材とした場合の性能が不十分となり、一方、２．５ｇ／２０ｍｍを越えると剥離音の改善（消音）効果が不十分となる。従って、カバー材としたときの性能（密着保持性）及び剥離音の改善効果の両方をバランス良く満足する好ましい剥離強度は、０．５〜２．０ｇ／２０ｍｍの範囲である。尚、粘着剤としては、アクリル系粘着剤、ゴム系粘着剤等である。 The peel strength of the easily peelable nonwoven fabric of the present invention with respect to the pressure-sensitive adhesive layer is adjusted to a range of 0.25 to 2.5 g / 20 mm. When the peel strength is less than 0.25 g / 20 mm, the performance when the cover material is used is insufficient. On the other hand, when it exceeds 2.5 g / 20 mm, the effect of improving (silence) the peel sound is insufficient. Therefore, the preferable peel strength that satisfies both the performance (adhesion retention) and the effect of improving the peeling sound when used as a cover material in a balanced manner is in the range of 0.5 to 2.0 g / 20 mm. In addition, as an adhesive, it is an acrylic adhesive, a rubber adhesive, etc.
尚、本発明において、剥離強度は、標準状態（２３℃×５０％ＲＨ）において、長さ１２．０ｃｍ×幅２．０ｃｍの短冊状の易剥離性不織布のサンプルを粘着剤層面に当て、その上を重量２ｋｇのローラーで２回、速度１ｃｍ／秒の速さで往復させ圧着さる。その後、易剥離性不織布サンプルの剥離角度１８０度、引っ張り速度５０ｍｍ／分で剥離し、そのときの剥離強度をストログラフで測定する。 In the present invention, the peel strength was measured by applying a strip-shaped easily peelable nonwoven fabric sample having a length of 12.0 cm and a width of 2.0 cm to the pressure-sensitive adhesive layer surface in a standard state (23 ° C. × 50% RH). The top is reciprocated twice with a roller having a weight of 2 kg at a speed of 1 cm / sec. Thereafter, the easily peelable nonwoven fabric sample is peeled at a peel angle of 180 degrees and a pulling speed of 50 mm / min, and the peel strength at that time is measured by a strograph.
上記の如き本発明の易剥離性不織布は、不織布にシリコーンエマルジョン系剥離剤をグラビヤ印刷とスプレーによって塗布することにより製造される。 The easily peelable nonwoven fabric of the present invention as described above is produced by applying a silicone emulsion release agent to the nonwoven fabric by gravure printing and spraying.
グラビア印刷による塗布だけでは塗工性が十分でなく、従って、剥離性が重くなり、剥離音も大きくなる。
一方、スプレーによる塗布だけでは塗工ムラが生じ、従って、剥離性にバラツキが大きくなり、剥離音もバラツキが避けられない。
従って、グラビア印刷による塗布とスプレーによる塗布を併用して初めて良好な塗布状態となり、安定した剥離性が得られ、目的とする剥離強度が達成され、その結果、剥離音が改善される。
特に、まずグラビア印刷により塗布し、次いで、スプレーにより塗布する方法が好ましい結果を与える。
Application by gravure printing alone does not provide sufficient coatability, and therefore the peelability becomes heavier and the peeling sound becomes larger.
On the other hand, application by spraying alone causes coating unevenness, and therefore, the peelability varies greatly, and the peeling noise cannot be avoided.
Therefore, a combination of gravure printing and spraying is used in combination to achieve a good coating state, a stable peelability can be obtained, and the intended peel strength can be achieved, with the result that the peeling sound is improved.
In particular, a method of applying first by gravure printing and then applying by spraying gives preferable results.
尚、スプレーによりシリコーンエマルジョン系剥離剤を噴霧塗布する場合、不織布を遮蔽する遮蔽板を用いることにより、線状や点状に塗布して塗工量を調整し、剥離強度をコントロールすることができる。また、遮蔽板の形状を変えたり、スプレーガン自体をライン中に移動させることにより、塗工パターンも自在に変えられ、その結果、剥離強度をコントロールすることができる。 When spraying the silicone emulsion release agent by spraying, it is possible to control the peel strength by adjusting the coating amount by applying a linear or dotted shape by using a shielding plate that shields the nonwoven fabric. . Further, the coating pattern can be freely changed by changing the shape of the shielding plate or moving the spray gun itself in the line, and as a result, the peel strength can be controlled.
グラビア印刷による塗布とスプレーによる塗布との併用により、上記した優れた結果が得られる理由は必ずしも定かではないが、グラビア印刷により不織布基材の表層部を塗布し、スプレーにより不織布の内層部を塗布することにより、十分な塗布状態となり目的とする剥離強度が得られるものと推定される。 The reason why the above-mentioned excellent results can be obtained by the combination of application by gravure printing and application by spraying is not necessarily clear, but the surface layer part of the nonwoven fabric substrate is applied by gravure printing and the inner layer part of the nonwoven fabric is applied by spraying. By doing so, it is presumed that a sufficient peeled state can be obtained and the desired peel strength can be obtained.
本発明の易剥離性不織布は、携行音や剥離音が改善され、これらの音の嫌がられるサニタリー製品の他、医療用、包装用等の分野においても有用である。 The easily peelable nonwoven fabric of the present invention is improved in carrying sound and peeling sound, and is useful not only in sanitary products in which these sounds are disliked, but also in medical and packaging fields.
以下、本発明を実施例及び比較例を挙げて更に詳細に説明するが、本発明はこれらにより何ら制限されるものではない。 EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated further in detail, this invention is not restrict | limited at all by these.
実施例１
ポリプロピレン製不織布ＳＭＳ（目付け２０ｇ／ｍ2 、幅１２３４ｍｍ；三井化学株式会社製）に、調整したシリコーン系剥離剤（信越化学工業株式会社製 ＫＭ−３９５１を水で希釈し固形分濃度を１０％としたもの）をグラビアロール（＃２００、深度４０μｍ）でウエットコート量約１ｇ／ｍ2 になるように塗布し、次いで、エアレススプレーガン（自動ガン、タイプＡ７Ａ、ノードソン株式会社製）で、ガンと不織布面との距離２３ｃｍ、噴霧量１ガン当たり２００ｃｃ／分で、同じ調整シリコーン系剥離剤を塗布し、その後、乾燥機（ドライヤー炉長：約２０ｍ）を用いて、50(i)-60(ii)-60(iii)-60(iv)-50(v)-80(vi)℃〔（ｉ）〜（ｖ）は各４ｍ長、（vi）は１．５ｍ長、（ｉ）、（ii）は上下風乾式、各ゾーン通過時間は２秒、（ｉ）〜（ｖ）の後に剥離剤塗布面の反対面に印刷を施し（vi）で乾燥〕、４．０ＫＷプレコロナ処理付、速度１２０ｍ／分、繰り出し１００Ｎ、巻取り１００Ｎの乾燥条件で乾燥し、易剥離性不織布のサンプルを作成した。
次に、上記易剥離性不織布のサンプルを用いて、下記の方法で剥離テストを行った。
Example 1
Non-woven fabric SMS made of polypropylene (weight per unit area 20 g / m 2 , width 1234 mm; manufactured by Mitsui Chemicals Co., Ltd.), and prepared silicone release agent (KM-3951 manufactured by Shin-Etsu Chemical Co., Ltd.) is diluted with water to a solid content concentration of 10%. With a gravure roll (# 200, depth 40 μm) so that the wet coating amount is about 1 g / m 2 , and then with an airless spray gun (automatic gun, type A7A, manufactured by Nordson Corporation) Apply the same adjusted silicone release agent at a distance of 23 cm from the nonwoven fabric surface and a spray rate of 200 cc / min per gun, and then use a dryer (dryer oven length: about 20 m) to obtain 50 (i) -60 ( ii) -60 (iii) -60 (iv) -50 (v) -80 (vi) ° C. [(i) to (v) are each 4 m long, (vi) is 1.5 m long, (i), ( ii) Up-and-down air-drying type, each zone passing time is 2 seconds, (i) ~ (v) After printing on the opposite surface of the release agent coated surface (drying in (vi)), 4.0KW pre-corona treatment, speed 120 m / min, drying under drying conditions of 100 N and winding 100 N, easy peelable nonwoven fabric sample It was created.
Next, a peel test was performed by the following method using the sample of the easily peelable nonwoven fabric.
サニタリー製品として市販品（花王社製「ロリエスパーガード」）のセパレーターを剥がした粘着剤層面に長さ１２．０ｃｍ×幅２．０ｃｍの短冊状に切り出した易剥離性不織布のサンプルを当接して、その上を重量２ｋｇのローラーで２回、速度１秒間１ｃｍの速さで往復させ圧着させた。その後、易剥離性不織布サンプルを剥離角度１８０度、引っ張り速度５０ｍｍ／分で粘着剤塗布面から剥離し、そのときの剥離強度をストログラフで測定し、剥離の際に発生する剥離音を下記の基準に従って聴覚により評価した。結果を表１に示した。
◎：剥離音がしない。
○：僅かに剥離音がする。
△：かなり剥離音がする。
×：大きな剥離音がする。
As a sanitary product, a sample of an easily peelable non-woven fabric cut into a strip of 12.0 cm in length and 2.0 cm in width was brought into contact with the pressure-sensitive adhesive layer surface from which a separator of a commercial product (“Rolles Spa Guard” manufactured by Kao Corporation) was peeled off. Then, the sheet was reciprocated twice with a roller having a weight of 2 kg at a speed of 1 cm for 1 second to be pressure-bonded. Thereafter, the easily peelable nonwoven fabric sample was peeled off from the pressure-sensitive adhesive-coated surface at a peeling angle of 180 ° and a pulling speed of 50 mm / min. Auditory evaluation according to criteria. The results are shown in Table 1.
A: There is no peeling sound.
○: Slight peeling noise
Δ: Exfoliation sound is made.
X: A loud peeling sound is produced.
また、粘着剤層にサンプルをカバー材として付着させた状態で手で握り、カサカサとした携行音を聴覚により評価した。
○：音がしない。
×：音がする。
Moreover, the sample was attached to the pressure-sensitive adhesive layer as a cover material, and it was grasped by hand, and the carrying sound made rustling was evaluated by hearing.
○: No sound
×: Sounds.
実施例２
シリコーン系剥離剤の塗布の順番を変更し、スプレーにより塗布した後グラビアロールにより塗布した他は実施例１と同様に操作した。評価を実施例１と同様に行い、結果を表１に示した。
Example 2
The operation was performed in the same manner as in Example 1 except that the order of application of the silicone release agent was changed, and the application was performed by spraying and then by the gravure roll. Evaluation was performed in the same manner as in Example 1, and the results are shown in Table 1.
比較例１
シリコーン系剥離剤のスプレーによる塗布は行わず、グラビヤロールによる塗布のみを行った他は実施例１と同様に操作及び評価を行った。結果を表１に示した。
Comparative Example 1
The operation and evaluation were carried out in the same manner as in Example 1 except that the silicone release agent was not applied by spraying but only the gravure roll was applied. The results are shown in Table 1.
比較例２
シリコーン系剥離剤の、グラビヤロールによる塗布は行わず、スプレーによる塗布のみを行った他は実施例１と同様に操作及び評価を行った。結果を表１に示した。
Comparative Example 2
The operation and evaluation were performed in the same manner as in Example 1 except that the silicone release agent was not applied with a gravure roll, but only applied with a spray. The results are shown in Table 1.
比較例３
セパレーター付きの市販品を用い、セパレーターの剥離テストを同様に行い、その結果を表１に示した。
Comparative Example 3
Using a commercially available product with a separator, a separator peel test was performed in the same manner, and the results are shown in Table 1.
比較例４
実施例１で用いたポリプロピレン製不織布ＳＭＳに剥離剤を塗布せず、乾燥も行わず、そのまま用いて剥離テストを行った。その結果を表１に示した。
Comparative Example 4
The release agent was not applied to the polypropylene nonwoven fabric SMS used in Example 1 and was not dried, and was used as it was to perform a peel test. The results are shown in Table 1.
上記表の結果から明かなように、剥離強度を特定の範囲内にコントロールした易剥離性不織布は、剥離音の問題が解消され、また携行音もしないことがわかる。 As is clear from the results in the above table, it can be seen that the easily peelable nonwoven fabric in which the peel strength is controlled within a specific range eliminates the problem of peel noise and does not carry sound.
叙上のとおり、本発明によれば、カバー性能を低下させることなく、剥離音の問題が改善されるとともに、携行音の問題も改善された易剥離性不織布を提供することができる。本発明の易剥離性不織布は、医療用、介装用等の各種分野で広く使用されるが、特に、携行音や剥離音が嫌われるサニタリー製品用として有用である。
As described above, according to the present invention, it is possible to provide an easily peelable nonwoven fabric in which the problem of peeling sound is improved and the problem of carrying sound is also improved without deteriorating the cover performance. The easily peelable nonwoven fabric of the present invention is widely used in various fields such as medical use and intervening use, and is particularly useful for sanitary products in which carrying sound and peeling sound are disliked.
Claims (7)
The method for producing an easily peelable nonwoven fabric according to any one of claims 1 to 5, wherein a silicone emulsion release agent is applied to the nonwoven fabric by gravure printing and then applied by spraying.
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