JP2018030936A - Polyvinyl chloride-based pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet - Google Patents

Polyvinyl chloride-based pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet Download PDF

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JP2018030936A
JP2018030936A JP2016163251A JP2016163251A JP2018030936A JP 2018030936 A JP2018030936 A JP 2018030936A JP 2016163251 A JP2016163251 A JP 2016163251A JP 2016163251 A JP2016163251 A JP 2016163251A JP 2018030936 A JP2018030936 A JP 2018030936A
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sensitive adhesive
pressure
polyvinyl chloride
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adhesive tape
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寛子 中山
Hiroko Nakayama
寛子 中山
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Denka Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To solve such a problem that a polyvinyl chloride-based pressure-sensitive adhesive tape is widely used in an electrical work and an automobile member, an exterior member, a repair member and the like of indoor and outdoor because of having electric insulating properties and flexibility than a conventional one and good pressure-sensitive adhesive physical properties, and a pressure-sensitive adhesive containing a natural rubber as a main raw material is mainly used from the point of product performance, and degradation, however, in the pressure-sensitive adhesive occurs.SOLUTION: A polyvinyl chloride-based pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet using a polyvinyl chloride resin-based material having such a specific blend that light transmittance in an ultraviolet light (290-360 nm) region is less than 0.3% can prevent degradation in a pressure-sensitive adhesive.SELECTED DRAWING: None

Description

本発明は、屋外の一時保管などにおいて発生するゴム系粘着剤層の劣化を抑制し、保管後もテープ展開時の背面への糊移りし難く、且つ、優れた作業性を有するポリ塩化ビニル系粘着テープまたは粘着シートに関する。 The present invention suppresses the deterioration of the rubber-based pressure-sensitive adhesive layer that occurs during outdoor temporary storage, etc., makes it difficult for glue to transfer to the back surface during tape development, and has excellent workability after storage. The present invention relates to an adhesive tape or an adhesive sheet.

従来より、ポリ塩化ビニル系粘着テープは、電気絶縁性や柔軟性をもち、良好な粘着物性を有することから、電気工事や自動車部材、屋内外の外装部材、補修部材などに用いられている。 Conventionally, a polyvinyl chloride adhesive tape has electrical insulating properties and flexibility, and has good adhesive properties, so it has been used for electrical work, automobile members, indoor / outdoor exterior members, repair members, and the like.

前記粘着テープは、様々な箇所で使用されることから、個包装形態で、小売店などで販売される。特に店頭や販売所、保管場所によっては、日光や蛍光灯が照射する場合がある。 Since the pressure-sensitive adhesive tape is used in various places, it is sold in a retail store or the like in individual packaging form. In particular, depending on the storefront, sales office, or storage location, sunlight or fluorescent light may be irradiated.

前記粘着テープには、粘着特性やコスト等の面から天然ゴムを原料とした粘着剤が多く使用されており、用途に応じて最適な製品性能を発現することが可能である。しかしながら、天然ゴムを原料とする粘着剤を用いた粘着テープでは、保管条件によって、テープを展開する際に基材の背面へ糊移りする不良がしばし発生し、解決を求められている。 The pressure-sensitive adhesive tape uses a lot of pressure-sensitive adhesive made of natural rubber from the viewpoints of pressure-sensitive adhesive properties and cost, and can exhibit optimum product performance depending on the application. However, in an adhesive tape using an adhesive made of natural rubber as a raw material, due to the storage conditions, when the tape is unfolded, a failure of glue transfer to the back surface of the substrate often occurs, and there is a need for a solution.

上記問題を解決する手法として、アクリル系の粘着剤を使用する方法などが過去から検討されているが、テープとしての粘着性能と保存特性を両立するには至っていない。また、特許文献1の基材層および粘着剤層の両者に紫外線吸収剤を添加する方法があるが、基材層と粘着剤層どちらにも紫外線吸収剤を添加することで、総量が増えるため、製造時の乾燥工程や、製品保管時に紫外線吸収剤のブリードアウトにより、表層の汚れが発生する可能性がある。 As a technique for solving the above problem, a method using an acrylic pressure-sensitive adhesive has been studied from the past, but it has not yet achieved both the adhesive performance as a tape and the storage characteristics. In addition, there is a method of adding an ultraviolet absorber to both the base material layer and the pressure-sensitive adhesive layer of Patent Document 1, but the total amount increases by adding the ultraviolet absorber to both the base material layer and the pressure-sensitive adhesive layer. There is a possibility that the surface layer may become dirty due to the drying process at the time of manufacture or the bleed-out of the UV absorber during product storage.

特開2001−115105号公報JP 2001-115105 A

本発明は、特定の配合のポリ塩化ビニル系樹脂基材を用いることで、屋外の一時保管などにおいて発生しうる、ゴム系粘着剤層の劣化を抑制し、保管後も展開時の背面への糊移りし難く、且つ、優れた作業性を有するポリ塩化ビニル系粘着テープまたは粘着シートを提供することである。 The present invention suppresses deterioration of the rubber-based pressure-sensitive adhesive layer, which may occur in outdoor temporary storage, etc. by using a polyvinyl chloride-based resin base material with a specific composition, and can be applied to the back surface when deployed even after storage. It is an object of the present invention to provide a polyvinyl chloride pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet that is difficult to transfer glue and has excellent workability.

すなわち本発明は以下の通りである。
(1)基材層と、前記基材層の片面に形成された粘着剤層とで構成されているポリ塩化ビニル系粘着テープまたは粘着シートであって、前記粘着剤層がゴムを粘着成分として含有し、前記基材層は、ポリ塩化ビニル系樹脂を50〜80質量%、紫外線吸収剤を0.1〜2.0質量%及び可塑剤を10〜48質量%含有し、紫外線(290〜360nm)域における光線透過率が0.3%未満あることを特徴とするポリ塩化ビニル系粘着テープまたは粘着シート。
(2)前記基材層の厚みが50〜500μmである(1)に記載の粘着フィルムまたは粘着テープ。
(3)前記基材層のポリ塩化ビニル系樹脂が、重合度1000〜1300である(1)または(2)に記載のポリ塩化ビニル系粘着テープまたは粘着シート。
That is, the present invention is as follows.
(1) A polyvinyl chloride pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet composed of a base material layer and a pressure-sensitive adhesive layer formed on one side of the base material layer, wherein the pressure-sensitive adhesive layer uses rubber as an adhesive component. And the base material layer contains 50 to 80% by mass of a polyvinyl chloride resin, 0.1 to 2.0% by mass of an ultraviolet absorber, and 10 to 48% by mass of a plasticizer. A polyvinyl chloride pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet having a light transmittance of less than 0.3% in a 360 nm) region.
(2) The pressure-sensitive adhesive film or pressure-sensitive adhesive tape according to (1), wherein the base material layer has a thickness of 50 to 500 μm.
(3) The polyvinyl chloride adhesive tape or adhesive sheet according to (1) or (2), wherein the polyvinyl chloride resin of the base material layer has a polymerization degree of 1000 to 1300.

本発明は、屋外での一時保管または店頭陳列等の際に、発生する粘着剤層の劣化を抑制し、テープ展開時の背面への糊移りを抑制することで、作業性低下を防止した、ポリ塩化ビニル系粘着テープまたは粘着シートを提供する。 The present invention suppresses deterioration of the pressure-sensitive adhesive layer that occurs during temporary storage outdoors or store display, etc., and suppresses adhesive transfer to the back surface during tape deployment, thereby preventing workability deterioration. A polyvinyl chloride adhesive tape or adhesive sheet is provided.

本発明は、ポリ塩化ビニル系樹脂基材およびゴム系粘着剤層から構成される粘着テープまたは粘着シートに関するものである。 The present invention relates to a pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet comprising a polyvinyl chloride resin substrate and a rubber-based pressure-sensitive adhesive layer.

本発明における基材層として用いられるポリ塩化ビニル樹脂系基材は、塩化ビニル樹脂系重合体、可塑剤、熱安定剤、紫外線吸収剤、顔料、添加剤などを混合した組成物を溶融混練して得ることができる。溶融混練方法は特に限定されるものではないが、二軸押出機、連続式及びバッチ式のニーダー、ロール、若しくはバンバリーミキサー等の加熱装置を備えた各種混合機、混練機が使用でき、前記組成物が均一分散するように混合し、得られる混合物を慣用の成形方法であるカレンダー法、Tダイ法、インフレーション法等により未延伸フィルムに成形する。成形機はカレンダー成形機が好ましい。カレンダー成形におけるロール配列方式は、例えば、L型、逆L型、Z型などの公知の方式を採用でき、また、ロール温度は通常150〜200℃、好ましくは160〜190℃に設定される。 The polyvinyl chloride resin base material used as the base material layer in the present invention is obtained by melt-kneading a composition in which a vinyl chloride resin polymer, a plasticizer, a heat stabilizer, an ultraviolet absorber, a pigment, an additive and the like are mixed. Can be obtained. Although the melt-kneading method is not particularly limited, various mixers and kneaders equipped with a heating device such as a twin screw extruder, continuous and batch kneaders, rolls, or Banbury mixers can be used, and the composition The product is mixed so as to be uniformly dispersed, and the resulting mixture is formed into an unstretched film by a calendering method, a T-die method, an inflation method, or the like, which is a conventional forming method. The molding machine is preferably a calendar molding machine. As a roll arrangement method in calendar molding, for example, a known method such as L-type, reverse L-type, and Z-type can be adopted, and the roll temperature is usually set to 150 to 200 ° C, preferably 160 to 190 ° C.

基材中の塩化ビニル樹脂系重合体としては、ポリ塩化ビニルの他、塩化ビニル−酢酸ビニル共重合体、塩化ビニル−エチレン共重合体、塩化ビニル−プロピレン共重合体、若しくは塩素化ポリエチレン等が挙げられる。これらは単独で又は2種以上選択して使用してもよい。なお、本発明の効果を損なわない範囲にてこれ以外のものが含まれていてもよい。また、塩化ビニル系重合体は安価で汎用性のあるポリ塩化ビニルがよく、重合度は700〜3000のものが使用でき、加工性の問題から重合度1000〜1300のものが好ましい。ポリ塩化ビニル系樹脂の重合度が1000より低い場合は、得られたフィルムの機械的強度も不足する傾向にある。また、逆に重合度が1300より高い場合、フィルム加工性に劣る傾向にある。前記重合度は、樹脂200mgをニトロベンゼン50mlに溶解させ、このポリマー溶液を30℃恒温槽中、ウベローデ型粘度計を用いて比粘度を測定し、JIS−K6721により算出したものである。 Examples of the vinyl chloride resin-based polymer in the substrate include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, vinyl chloride-ethylene copolymer, vinyl chloride-propylene copolymer, or chlorinated polyethylene. Can be mentioned. These may be used alone or in combination of two or more. In addition, the thing except this may be contained in the range which does not impair the effect of this invention. The vinyl chloride polymer is preferably inexpensive and versatile polyvinyl chloride, and a polymerization degree of 700 to 3000 can be used, and a polymerization degree of 1000 to 1300 is preferable from the viewpoint of processability. When the polymerization degree of the polyvinyl chloride resin is lower than 1000, the mechanical strength of the obtained film tends to be insufficient. Conversely, when the degree of polymerization is higher than 1300, the film processability tends to be inferior. The degree of polymerization is calculated according to JIS-K6721 by dissolving 200 mg of resin in 50 ml of nitrobenzene, measuring the specific viscosity of this polymer solution in a constant temperature bath at 30 ° C. using an Ubbelohde viscometer.

基材中の紫外線吸収剤としては、紫外線〜近紫外線域に光吸収能を持つ各種材料を使用することができる。例えば、ベンゾトリアゾール系、トリアジン系、ベンゾエート系、ベンゾエート系、若しくはヒンダートアミン系化合物等が挙げられる。これらは単独で用いてもよく、二種類以上を混合して用いてもよい。 As the ultraviolet absorber in the substrate, various materials having a light absorbing ability in the ultraviolet to near ultraviolet region can be used. Examples thereof include benzotriazole-based, triazine-based, benzoate-based, benzoate-based, and hindered amine-based compounds. These may be used singly or in combination of two or more.

基材中の紫外線吸収剤の添加量は、0.1〜2.0質量%であり、好ましくは0.2〜1.0質量%である。紫外線吸収剤が0.1質量%より少ない場合は、基材透過率が高くなり、糊残りの改善効果が小さくなる。また逆に、紫外線吸収剤が2.0質量%より多い場合、基材製膜時にブリードした紫外線吸収剤によりロールが汚れやすくなる。 The addition amount of the ultraviolet absorber in a base material is 0.1-2.0 mass%, Preferably it is 0.2-1.0 mass%. When the amount of the ultraviolet absorber is less than 0.1% by mass, the substrate transmittance is increased and the effect of improving the adhesive residue is reduced. On the other hand, when the amount of the ultraviolet absorbent is more than 2.0% by mass, the roll is easily soiled by the ultraviolet absorbent that is bleed when the substrate is formed.

基材中の可塑剤としては、エステル系可塑剤、ポリエステル系可塑剤等を使用でき、好ましくはエステル系高分子量可塑剤がよい。可塑剤の具体例としては、DINP(フタル酸ジイソノニル)、DHP(フタル酸ジヘプチル)、DOP(フタル酸ジ−2−エチルヘキシル)、n−DOP(フタル酸ジ−n−オクチル)、DIDP(フタル酸ジイソデシル)、BBP(ベンジルブチルフタレート)、TOTM(トリメリット酸トリ−2−エチルヘキシル)、DOA(アジピン酸ジ−2−エチルヘキシル)、TCP(トリクレジルフォスフェート)、BOA(ベンジルオクチルアジペート)、DPCP(ジフェニルクレジルフォスフェート)若しくはアジピン酸ジイソデシル等が挙げられる。これらは単独で又は2種以上選択して使用してもよい。これらの中で、フタル酸ジイソノニルが好ましい。 As the plasticizer in the substrate, an ester plasticizer, a polyester plasticizer, or the like can be used, and an ester high molecular weight plasticizer is preferable. Specific examples of the plasticizer include DINP (diisononyl phthalate), DHP (diheptyl phthalate), DOP (di-2-ethylhexyl phthalate), n-DOP (di-n-octyl phthalate), DIDP (phthalic acid) Diisodecyl), BBP (benzylbutyl phthalate), TOTM (tri-2-ethylhexyl trimellitic acid), DOA (di-2-ethylhexyl adipate), TCP (tricresyl phosphate), BOA (benzyloctyl adipate), DPCP (Diphenyl cresyl phosphate) or diisodecyl adipate. These may be used alone or in combination of two or more. Of these, diisononyl phthalate is preferred.

基材中の可塑剤の添加量は10〜48質量%であり、好ましくは20〜40質量%、さらに好ましくは25〜35質量%である。可塑剤が10質量%より少ない場合、柔軟性が得られない。また、逆に可塑剤が50質量%より多い場合、組成物自体の引張強度が低下してしまいかつ、成形加工時がしにくい。 The addition amount of the plasticizer in the substrate is 10 to 48% by mass, preferably 20 to 40% by mass, and more preferably 25 to 35% by mass. When the plasticizer is less than 10% by mass, flexibility cannot be obtained. On the other hand, when the plasticizer is more than 50% by mass, the tensile strength of the composition itself is lowered and it is difficult to perform the molding process.

基材中の添加剤としては、必要に応じて安定剤、滑剤、難燃剤、充填剤、さらに着色剤を添加することができる。安定剤としては金属石鹸(高級脂肪酸の金属塩;例えばバリウム−亜鉛系、カルシウム−亜鉛系等)、鉛系等がある。滑剤としては、炭酸水素C12〜C30系、脂肪酸(ワックス)系、エステル(ワックス)系、脂肪酸エステル系、C12〜C30脂肪酸金属石鹸系、C12〜C30脂肪アルコール(ワックス)系等がある。難燃剤としては三酸化アンチモン等がある。充填剤としては炭酸カルシウム、タルク、若しくはシリカ等の無機充填剤等がある。 As additives in the substrate, stabilizers, lubricants, flame retardants, fillers, and colorants can be added as necessary. Stabilizers include metal soaps (metal salts of higher fatty acids; such as barium-zinc and calcium-zinc) and lead. Examples of the lubricant include hydrogen carbonate C12 to C30, fatty acid (wax), ester (wax), fatty acid ester, C12 to C30 fatty acid metal soap, and C12 to C30 fatty alcohol (wax). Examples of the flame retardant include antimony trioxide. Examples of the filler include inorganic fillers such as calcium carbonate, talc, and silica.

本発明における基材層の厚さは、使用目的や用途等に応じて様々であるが、通常50〜500μm、さらに好ましくは100〜400μm、さらに好ましくは160〜250μmである。基材部の厚さが50μmより薄い場合は、基材製膜の際にロールへの貼りつきや、基材の過剰な弛みが発生し生産性が悪い。また、逆に基材部の厚さが500μmより厚い場合は、粘着テープを使用する際に厚さによる剛性から追従性が悪くなる。 The thickness of the base material layer in the present invention varies depending on the purpose of use and application, but is usually 50 to 500 μm, more preferably 100 to 400 μm, and more preferably 160 to 250 μm. When the thickness of the base material portion is less than 50 μm, sticking to a roll or excessive slackening of the base material occurs during film formation of the base material, resulting in poor productivity. On the other hand, when the thickness of the base material portion is larger than 500 μm, the followability deteriorates from the rigidity due to the thickness when using the adhesive tape.

本発明における基材は、波長290〜360nmにおける光線透過率が、同領域の範囲すべてで0.3%未満である。上記波長域での一部の範囲でも光線透過率が0.3%を越える基材を用いた場合、目的とする粘着剤の保存安定性を得ることが難しい。 The base material in the present invention has a light transmittance at a wavelength of 290 to 360 nm of less than 0.3% in the entire region. When a substrate having a light transmittance exceeding 0.3% is used even in a part of the wavelength range, it is difficult to obtain the storage stability of the target pressure-sensitive adhesive.

粘着剤に使用するゴムは、溶剤で溶解した材料や水に分散したラテックス状態の材料を使用することができる。粘着性能の面から天然ゴム、それに他種成分を反応させたグラフト天然ゴムなども使用することができる。また、天然ゴムあるいはグラフト天然ゴム20〜70質量部に対して、合成ゴム80〜30質量部配合させることができ、天然ゴムおよび合成ゴム100部に対し、粘着付与剤50〜150部、さらに可塑剤や添加剤を適宜配合することが好ましい。 The rubber used for the pressure-sensitive adhesive can be a material dissolved in a solvent or a latex-like material dispersed in water. From the viewpoint of adhesive performance, natural rubber, and grafted natural rubber obtained by reacting other components with it can also be used. Further, 80-30 parts by mass of synthetic rubber can be blended with 20-70 parts by mass of natural rubber or grafted natural rubber, and 50-150 parts of tackifier with respect to 100 parts of natural rubber and synthetic rubber. It is preferable to add agents and additives as appropriate.

合成ゴムとしては、天然ゴム−メタクリル酸メチル共重合体(MG)、スチレン−ブタジエン共重合体(SBR)、アクリロニトリル−ブタジエン共重合体(NBR)、メタクリル酸メチル−ブタジエン共重合体(MBR)などが挙げられる。これらは単独で又は2種以上を混合して選択して使用してもよい。 ただし、粘着剤中にアクリルエマルション(メチルアクリレートや2−エチルヘキシルアクリレートなど)を多く配合すると、粘着剤の凝集性が低くなり、テープ展開の際に粘着剤層が凝集破壊してしまう可能性があり、好ましくない。 Synthetic rubbers include natural rubber-methyl methacrylate copolymer (MG), styrene-butadiene copolymer (SBR), acrylonitrile-butadiene copolymer (NBR), methyl methacrylate-butadiene copolymer (MBR), etc. Is mentioned. These may be used alone or in combination of two or more. However, if a large amount of acrylic emulsion (methyl acrylate, 2-ethylhexyl acrylate, etc.) is blended in the pressure-sensitive adhesive, the cohesiveness of the pressure-sensitive adhesive is lowered, and the pressure-sensitive adhesive layer may cohesively break during tape development. It is not preferable.

粘着剤中の粘着付与剤としては、軟化点、各成分との相溶性等を考慮して選択することができる。例えば、テルペン樹脂、ロジン樹脂、水添ロジン樹脂、クマロン・インデン樹脂、スチレン系樹脂、脂肪族系石油樹脂、脂環族系石油樹脂、テルペン−フェノール樹脂、キシレン系樹脂、その他脂肪族炭化水素樹脂又は芳香族炭化水素樹脂等が挙げられる。これらは単独で用いてもよく、二種類以上を混合して用いてもよい。 The tackifier in the pressure-sensitive adhesive can be selected in consideration of the softening point, compatibility with each component, and the like. For example, terpene resin, rosin resin, hydrogenated rosin resin, coumarone / indene resin, styrene resin, aliphatic petroleum resin, alicyclic petroleum resin, terpene-phenol resin, xylene resin, other aliphatic hydrocarbon resin Or an aromatic hydrocarbon resin etc. are mentioned. These may be used singly or in combination of two or more.

上記、ポリ塩化ビニル系基材層とゴム系粘着剤層の密着性を向上させるため、公知の一般的なプライマーを適時使用することもできる。 In order to improve the adhesion between the polyvinyl chloride base material layer and the rubber pressure-sensitive adhesive layer, a known general primer can be used as appropriate.

本発明における粘着フィルムおよび粘着テープは、上記基材層の片面に粘着剤層を塗工し、乾燥炉により水分を十分に乾燥させたうえで、テープログ形状に巻取り、任意の幅に切断されることで、テープ形状へ成型される。なお、粘着剤層の塗工方式としては、コンマ方式、リップダイ方式、若しくはグラビア方式などが挙げられる。 The pressure-sensitive adhesive film and pressure-sensitive adhesive tape of the present invention are coated with a pressure-sensitive adhesive layer on one side of the base material layer, sufficiently dried in a drying furnace, wound into a tape log shape, and cut into an arbitrary width. By doing so, it is molded into a tape shape. Examples of the coating method for the pressure-sensitive adhesive layer include a comma method, a lip die method, and a gravure method.

以下に実施例をあげて本発明を更に詳細に説明する。また、これらはいずれも例示的なものであって、本発明の内容を限定するものではない。 Hereinafter, the present invention will be described in more detail with reference to examples. Moreover, these are all illustrative and do not limit the contents of the present invention.

<光線透過率>
紫外可視分光光度計(株式会社島津、UV−2700)により、ポリ塩化ビニル系基材の光波長290〜360nmにおける光線透過率を測定し、以下の評価基準で判断した。
○:光波長290〜360nmにおける、すべての範囲で光線透過率が0.3%未満。
×:光波長290〜360nmにおける、一部またはすべての範囲で光線透過率が0.3%を超過。
<Light transmittance>
The light transmittance at a light wavelength of 290 to 360 nm of the polyvinyl chloride base material was measured with an ultraviolet-visible spectrophotometer (Shimadzu Corporation, UV-2700), and judged according to the following evaluation criteria.
A: Light transmittance is less than 0.3% in the entire range at a light wavelength of 290 to 360 nm.
X: The light transmittance exceeds 0.3% in a part or all of the range at a light wavelength of 290 to 360 nm.

<基材製膜性>
カレンダーロール温度150〜200℃でカレンダー成型における基材の製膜性を、以下の評価基準で判断した。
○:基材製膜時、問題なく製膜可能。
×:基材製膜時、ロールへの貼りつきや汚れ、基材のベタツキ、ピンホール、基材の極端なたるみなどの問題点により、製膜不良。
<Substrate film-forming property>
The film forming property of the base material in calendar molding at a calender roll temperature of 150 to 200 ° C. was judged according to the following evaluation criteria.
○: The film can be formed without any problem when forming the substrate.
X: Poor film formation due to problems such as sticking to a roll or dirt, stickiness of the base material, pinholes, extreme slackness of the base material, etc.

<作業性(追従性)>
追従性とは、被着体に粘着テープを巻きつけた後、温度23±2℃、湿度50±5%RHに設定された評価試験室内で24時間保管し、粘着テープのハガレ状態や被着体の形状に合わせて張り付いているかを評価したもので、以下の評価基準で判断した。
○:粘着テープのハガレなどなく、追従性良好。
×:粘着テープのハガレが発生したり、被着体形状に柔軟に張り付かず、追従性不良。
<Workability (Followability)>
Followability refers to the adhesive tape being wrapped around the adherend and then stored for 24 hours in an evaluation test room set at a temperature of 23 ± 2 ° C and humidity of 50 ± 5% RH. It was evaluated whether it was attached according to the shape of the body, and was judged according to the following evaluation criteria.
◯: There is no peeling of the adhesive tape, and followability is good.
X: Peeling of the adhesive tape occurs or it does not stick to the adherend shape flexibly, resulting in poor followability.

<作業性(伸張性)>
伸長性とは、テープを展開または伸ばした際の評価項目であり、当該テープを温度23±2℃、湿度50±5%RHに設定された評価試験室内で、以下の評価基準で判断した。
○:粘着テープが容易に展開・伸長可能でき、作業に支障をきたさない状態のため、伸張性良好。
×:粘着テープを伸長させると、断裂または、硬く伸長させるのが困難で、作業に支障をきたすため、伸長性不良。
<Workability (extensibility)>
The extensibility is an evaluation item when the tape is developed or stretched, and was judged according to the following evaluation criteria in an evaluation test chamber in which the temperature was set to 23 ± 2 ° C. and humidity 50 ± 5% RH.
○: The adhesive tape can be easily expanded and stretched, and the workability is not hindered.
X: When the adhesive tape is stretched, it is difficult to tear or hardly stretch, and the work is hindered.

<作業性(展開性)>
展開性とは、テープを展開した際の評価項目であり、温度23±2℃、湿度50±5%RHに設定された評価試験室内で、テープを展開した時に基材背面への粘着剤残りの状態について、以下の評価基準で判断した。
○:基材背面への粘着剤残りなく、展開性良好。
×:粘着剤が凝集破壊または界面剥離し基材背面へ粘着剤が残るため、展開性不良。
<Workability (deployability)>
Expandability is an evaluation item when the tape is expanded, and the adhesive remains on the back of the substrate when the tape is expanded in an evaluation test chamber set at a temperature of 23 ± 2 ° C. and a humidity of 50 ± 5% RH. The condition was evaluated based on the following evaluation criteria.
○: No adhesive remains on the back of the substrate, and developability is good.
X: Since the pressure-sensitive adhesive is cohesive fractured or peeled off at the interface and the pressure-sensitive adhesive remains on the back surface of the substrate, the developability is poor.

<屋外暴露試験>
粘着テープ試験片約20cmを、汎用ポリエチレンテレフタラート(PET)フィルムに貼付、テープ背面側から、日光が照射されるように屋外暴露する。7日間屋外に暴露した後、温度23±2℃、湿度50±5%RHに設定された評価試験室内で、PETフィルムから粘着テープ試験片を再剥離した際の、粘着剤層の状態を観察し、以下の評価基準で判断した。
◎:試験片の粘着剤層が、PETフィルムへ糊移りしない。
○:試験片の粘着剤層が、PETフィルムへわずかに糊移りする。
×:試験片の粘着剤層が、PETフィルムへ糊移りする。
<Outdoor exposure test>
An adhesive tape test piece of about 20 cm is affixed to a general-purpose polyethylene terephthalate (PET) film, and exposed outdoors so that sunlight is irradiated from the back side of the tape. After exposure to the outdoors for 7 days, observe the state of the adhesive layer when the adhesive tape test piece is peeled again from the PET film in an evaluation test chamber set at a temperature of 23 ± 2 ° C and a humidity of 50 ± 5% RH. Judgment was made based on the following evaluation criteria.
A: The adhesive layer of the test piece does not transfer to the PET film.
○: The adhesive layer of the test piece slightly transfers to the PET film.
X: The adhesive layer of the test piece is transferred to the PET film.

<耐候性試験機加速試験>
粘着テープ試験片約5cmを、汎用ポリエチレンテレフタラート(PET)フィルムに貼付、テープ背面側から、耐候性試験機アイスーパーSUV−W131(岩崎電気(株))により、照度100±8mW/cm、光波長295〜450nmの光を1.5時間照射した。その後、温度23±2℃、湿度50±5%RHに設定された評価試験室内で、PETフィルムから粘着テープ試験片を再剥離した際の、粘着剤層の状態を観察し、以下の評価基準で判断した。
◎:試験片の粘着剤層が、PETフィルムへ糊移りしない。
○:試験片の粘着剤層が、PETフィルムへわずかに糊移りする。
×:試験片の粘着剤層が、PETフィルムへ糊移りする。
<Acceleration test of weather resistance tester>
The adhesive tape test piece about 5 cm, attached to universal polyethylene terephthalate (PET) film, from the tape back side, the weathering tester EYE SUPER SUV-W131 (by Iwasaki Electric Co.), illuminance 100 ± 8mW / cm 2, Light having a light wavelength of 295 to 450 nm was irradiated for 1.5 hours. Thereafter, the state of the pressure-sensitive adhesive layer when the pressure-sensitive adhesive tape test piece was peeled again from the PET film was observed in an evaluation test chamber set at a temperature of 23 ± 2 ° C. and a humidity of 50 ± 5% RH. Judged.
A: The adhesive layer of the test piece does not transfer to the PET film.
○: The adhesive layer of the test piece slightly transfers to the PET film.
X: The adhesive layer of the test piece is transferred to the PET film.

表1〜2にある原料は、以下のものを採用した。
<PVCコンパウンド>
(1)ポリ塩化ビニル樹脂(PVC)
・TH−1000(重合度1000)、大洋塩ビ社製
・TH−1300(重合度1300)、大洋塩ビ社製
(2)炭酸カルシウム
カルシーズP、神島化学工業(株)社製
(3)可塑剤
フタル酸ジイソノニル、(株)ジェイプラス社製
(4)添加剤
表中の添加剤は、下記OW−5200 93質量%/ステアリン酸さくら 7質量%の混合物を使用した。
・OW−5200(Ca−Zn−Mg系複合安定剤)、堺化学(株)社製
・ステアリン酸さくら (ステアリン酸、滑剤)、日本油脂(株)社製
<顔料>
GBV−375−P(バイオレット)、日本ピグメント(株) 社製
<紫外線吸収剤>
Tinuvin P(ベンゾトリアゾール系)、BASF社製
<粘着剤>
・ゴム系粘着剤は、天然ゴムラテックス(HA LATEX,レヂテックス社製)60質量部と、合成ゴムラテックス(MG−40S、レヂテックス社製)40質量部に対し、石油樹脂系エマルション粘着付与剤135質量部を含有する。
・アクリルエマルション系粘着剤は、X−412−615E(サイデン化学(株))を使用した。
The raw materials shown in Tables 1 and 2 were as follows.
<PVC compound>
(1) Polyvinyl chloride resin (PVC)
TH-1000 (degree of polymerization 1000), manufactured by Taiyo PVC Co., Ltd. TH-1300 (degree of polymerization 1300), manufactured by Taiyo PVC Co., Ltd. (2) Calcium Carbonate Calseeds P, manufactured by Kanjima Chemical Industries, Ltd. (3) Plasticizer Diisononyl phthalate, manufactured by J-PLUS Co., Ltd. (4) Additive The additive in the table was a mixture of the following OW-5200 93 mass% / stearic acid cherry 7 mass%.
・ OW-5200 (Ca—Zn—Mg composite stabilizer), manufactured by Sakai Chemical Co., Ltd. ・ Stearic acid cherry (stearic acid, lubricant), manufactured by Nippon Oil & Fats Co., Ltd. <Pigment>
GBV-375-P (violet), manufactured by Nippon Pigment Co., Ltd. <UV absorber>
Tinuvin P (benzotriazole), manufactured by BASF <adhesive>
・ Rubber adhesive is 135 parts of petroleum resin emulsion tackifier for 60 parts by weight of natural rubber latex (HA LATEX, manufactured by Restex) and 40 parts by weight of synthetic rubber latex (MG-40S, manufactured by Restex). Parts.
-X-412-615E (Siden Chemical Co., Ltd.) was used for the acrylic emulsion adhesive.

[実施例1]
(1)ポリ塩化ビニル樹脂(TH−1000(重合度1000)、大洋塩ビ)60質量%/炭酸カルシウム(カルシーズ P、神島化学工業(株))8質量%/可塑剤(フタル酸ジイソノニル、(株)ジェイプラス)30質量%/他添加剤(安定剤(Ca−Zn−Mg系複合系)、滑剤(ステアリン酸))2質量%を混合してなる塩化ビニル樹脂系コンパウンドに対し、顔料(GBV−375−P、日本ピグメント(株))0.1質量%、紫外線吸収剤(Tinuvin P、BASF)0.2質量%となる配合物を、ウォーミングロールで均一に分散するように溶融混練したのち、カレンダー成形機により、ロール温度165℃にて約0.16mmのフィルムを作製した。
(2)作製した基材層の片面に、コンマ方式塗工により天然ゴムエマルション系粘着剤を厚さ約30μmに塗工し、テープログ形状に巻き取った後19mm幅に切断し、テープを得た。各種特性評価を行った結果は表1に示した。
[Example 1]
(1) Polyvinyl chloride resin (TH-1000 (degree of polymerization 1000), Taiyo PVC) 60% by mass / Calcium carbonate (Calcies P, Kamijima Chemical Co., Ltd.) 8% by mass / Plasticizer (Diisononyl phthalate, Inc. ) Jay Plus) 30% by mass / other additives (stabilizer (Ca—Zn—Mg-based composite), lubricant (stearic acid)) 2% by mass with respect to the vinyl chloride resin-based compound, pigment (GBV) -375-P, Nippon Pigment Co., Ltd.) 0.1% by mass and UV absorber (Tinuvin P, BASF) 0.2% by mass were melt-kneaded so as to be uniformly dispersed by a warming roll. After that, a film having a roll temperature of 165 ° C. and a thickness of about 0.16 mm was produced by a calendar molding machine.
(2) Apply a natural rubber emulsion adhesive to a thickness of about 30μm on one side of the prepared base layer by comma coating, wind up into a tape log shape, cut into 19mm width, and obtain a tape It was. The results of various characteristic evaluations are shown in Table 1.

[実施例2〜9、比較例1〜7]
表1、2に、実施例1と同様の製法で、実施例2〜9、比較例1〜7を製造した。配合と、各種特性評価を行った結果を示す。
[Examples 2 to 9, Comparative Examples 1 to 7]
In Tables 1 and 2, Examples 2 to 9 and Comparative Examples 1 to 7 were produced in the same manner as in Example 1. The results of blending and various characteristic evaluations are shown.

Figure 2018030936
Figure 2018030936

Figure 2018030936
Figure 2018030936

[比較例1]
比較例1では、請求項1に記載の紫外線吸収剤を添加しないため、基材により紫外線が十分にさえぎることができず、粘着剤層の糊移りが発生した。
[比較例2]
比較例2では、請求項1に記載の紫外線吸収剤の添加量を越えているため、基材製膜時、カレンダーロールへ汚れが発生した。
[比較例3]
比較例3では、請求項1に記載の紫外線吸収剤を添加していないため、基材により紫外線が十分にさえぎることができず、粘着剤層の糊移りが発生した。
[比較例4]
比較例4では、請求項1に記載の紫外線吸収剤の添加量を越えているため、基材製膜時、カレンダーロールへ汚れが発生した。
[比較例5]
比較例5では、請求項1に記載のポリ塩化ビニル樹脂の添加量未満であり、可塑剤も範囲を越えて添加しているため、基材製膜時、カレンダーロールへ貼りつき、生産性が悪くなった。
[比較例6]
比較例6では、請求項1に記載の可塑剤の添加量未満であり、基材製膜時、ピンホールが発生し、孔なく製膜できなかった。また、テープを展開した際、テープが硬く、被着体形状に柔軟に張り付かないことから追従性が悪く、作業に支障をきたす。
[比較例7]
比較例7では、請求項1に記載のゴム系でなく、アクリル系を使用しているため、粘着層と基材の密着性が高く、基材背面への粘着剤残りが発生した。
[Comparative Example 1]
In Comparative Example 1, since the ultraviolet absorbent according to claim 1 was not added, ultraviolet rays could not be sufficiently blocked by the base material, and glue transfer of the adhesive layer occurred.
[Comparative Example 2]
In Comparative Example 2, the amount of addition of the ultraviolet absorber described in claim 1 was exceeded, so that the calendar roll was soiled during film formation of the substrate.
[Comparative Example 3]
In Comparative Example 3, since the ultraviolet absorbent according to claim 1 was not added, ultraviolet rays could not be sufficiently blocked by the base material, and glue transfer of the pressure-sensitive adhesive layer occurred.
[Comparative Example 4]
In Comparative Example 4, since the amount of the ultraviolet absorbent added according to claim 1 was exceeded, the calendar roll was soiled during film formation of the substrate.
[Comparative Example 5]
In Comparative Example 5, since it is less than the addition amount of the polyvinyl chloride resin according to claim 1 and the plasticizer is also added beyond the range, it adheres to the calender roll when forming the substrate, and the productivity is It got worse.
[Comparative Example 6]
In Comparative Example 6, the amount was less than the amount of the plasticizer added according to claim 1, pinholes were generated during film formation of the base material, and no film formation was possible without holes. Further, when the tape is unfolded, the tape is hard and does not stick flexibly to the adherend shape, so the followability is poor and the work is hindered.
[Comparative Example 7]
In Comparative Example 7, since the acrylic system was used instead of the rubber system described in claim 1, the adhesiveness between the adhesive layer and the base material was high, and the adhesive remaining on the back surface of the base material was generated.

本発明の粘着フィルムおよび粘着テープを用いることによって、店頭や倉庫での、粘着剤の光劣化を抑制され、テープを展開した際に、背面へ糊残りが抑制することでき、使用者が不快感を覚えることなくテープを使用することができる。特に小売り販売の多い、文具用途分野への展開が期待できる。 By using the pressure-sensitive adhesive film and pressure-sensitive adhesive tape of the present invention, the photodegradation of the pressure-sensitive adhesive at stores and warehouses is suppressed, and when the tape is unfolded, the adhesive residue can be suppressed on the back surface, and the user feels uncomfortable. You can use the tape without remembering. In particular, it can be expected to expand into the field of stationery applications, where retail sales are high.

Claims (3)

基材層と、前記基材層の片面に形成された粘着剤層とで構成されているポリ塩化ビニル系粘着テープまたは粘着シートであって、前記粘着剤層がゴムを粘着成分として含有し、前記基材層は、ポリ塩化ビニル系樹脂を50〜80質量%、紫外線吸収剤を0.1〜2.0質量%及び可塑剤を10〜48質量%含有し、紫外線(290〜360nm)域における光線透過率が0.3%未満あることを特徴とするポリ塩化ビニル系粘着テープまたは粘着シート。 A polyvinyl chloride pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet comprising a base material layer and a pressure-sensitive adhesive layer formed on one side of the base material layer, wherein the pressure-sensitive adhesive layer contains rubber as an adhesive component, The base material layer contains 50 to 80% by mass of a polyvinyl chloride resin, 0.1 to 2.0% by mass of an ultraviolet absorber and 10 to 48% by mass of a plasticizer, and an ultraviolet (290 to 360 nm) region. The polyvinyl chloride pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet has a light transmittance of less than 0.3%. 前記基材層の厚みが50〜500μmである請求項1に記載の粘着フィルムまたは粘着テープ。 The pressure-sensitive adhesive film or pressure-sensitive adhesive tape according to claim 1, wherein the base material layer has a thickness of 50 to 500 μm. 前記基材層のポリ塩化ビニル系樹脂が、重合度1000〜1300である請求項1または2に記載のポリ塩化ビニル系粘着テープまたは粘着シート。




The polyvinyl chloride pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet according to claim 1 or 2, wherein the polyvinyl chloride resin of the base material layer has a polymerization degree of 1000 to 1300.




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