JPH0477591A - Hot-melt adhesive composition - Google Patents
Hot-melt adhesive compositionInfo
- Publication number
- JPH0477591A JPH0477591A JP2188665A JP18866590A JPH0477591A JP H0477591 A JPH0477591 A JP H0477591A JP 2188665 A JP2188665 A JP 2188665A JP 18866590 A JP18866590 A JP 18866590A JP H0477591 A JPH0477591 A JP H0477591A
- Authority
- JP
- Japan
- Prior art keywords
- melt adhesive
- styrene
- hot melt
- adhesive composition
- resin
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 37
- 239000004831 Hot glue Substances 0.000 title claims description 37
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- -1 styrene- ethylene-propylene-styrene Chemical class 0.000 claims abstract description 18
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920006132 styrene block copolymer Polymers 0.000 claims abstract description 8
- 239000004711 α-olefin Substances 0.000 claims description 19
- 229920005672 polyolefin resin Polymers 0.000 claims description 18
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 description 21
- 230000001070 adhesive effect Effects 0.000 description 21
- 239000000126 substance Substances 0.000 description 13
- 229920005601 base polymer Polymers 0.000 description 9
- 239000004698 Polyethylene Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000004745 nonwoven fabric Substances 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 229920003051 synthetic elastomer Polymers 0.000 description 8
- 239000005061 synthetic rubber Substances 0.000 description 8
- 239000004014 plasticizer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 208000010201 Exanthema Diseases 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 201000005884 exanthem Diseases 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 206010037844 rash Diseases 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Absorbent Articles And Supports Therefor (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、紙おむつ、生理用ナプキンのような衛生材
料の組み立て等に用いられるホットメルト接着剤組成物
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hot melt adhesive composition used for assembling sanitary materials such as disposable diapers and sanitary napkins.
一般に、衛生用品、特に紙おむつでは、むれ。 In general, sanitary products, especially disposable diapers, cause stuffiness.
かぶれ防止機能を高めるため、（ａ）多孔質ポリエチレ
ンフィルムをバックシート（外側シート）に使用したり
、（ハ）立体ギヤザーと呼ばれる股ギヤザーが使用され
たり様々な工夫が凝らされている。このような紙おむつ
において、（ａ）の多孔質ポリエチレンフィルムをバッ
クシートに用いるものは、通常、不織布をトップシート
（肌に接する内側シート）に用い、両者をホットメルト
接着剤で接着して構成されている。また、（ｂ）の立体
ギヤザーを用いるものは、立体ギヤザー（伸縮性材料を
不織布で包み込んだもの）と上記トップシートとをホッ
トメルト接着剤で接着して構成されている。上記（ａ）
、（ロ）に用いられるホットメルト接着剤には、紙おむ
つの特性上、■多孔質ポリエチレンフィルムから接着剤
中の低分子量物がしみ出し美観を損なわないこと、■上
記立体ギヤザーの組み立てに用いる場合には根元に使用
して肌に触れてもかぶれ、ないこと、■柔軟でかつ白色
もしくは無色であり無臭であること等が重要な性能とし
て要求されている。In order to improve the rash prevention function, various ideas have been devised, such as (a) using porous polyethylene film for the back sheet (outer sheet), and (c) using crotch gears called three-dimensional gears. In such disposable diapers, those using porous polyethylene film as the backsheet (a) are usually constructed by using a nonwoven fabric as the topsheet (inner sheet that comes into contact with the skin) and bonding the two with hot melt adhesive. ing. Moreover, the one using the three-dimensional gears (b) is constructed by bonding the three-dimensional gears (stretchable material wrapped in a nonwoven fabric) and the above-mentioned top sheet with a hot melt adhesive. (a) above
Due to the characteristics of disposable diapers, the hot-melt adhesive used in (b) must be: (1) Low molecular weight substances in the adhesive do not seep out from the porous polyethylene film and impair the aesthetic appearance; (2) When used for assembling the three-dimensional gears mentioned above; Important performance requirements include: - No irritation when used on the roots of the skin, and - Flexible, white or colorless, and odorless.
従来から、バックシートとトップシートの接着には合成
ゴム賞をベースポリマーとしたホットメルト接着剤が使
用されている。この合成ゴム系のホットメルト接着剤は
、常温でも粘着性を有し、いわばべたべたした状態のも
のであるが、ポリマー中に含有することのできる低分子
量物の量が他のポリマーに比べて極端に多いため、むれ
防止のために使用される多孔質ポリエチレンフィルムか
らのしみ出しを抑制することができる。最近では、紙お
むつの風合いをさらに柔らか（し、かつコストダウンを
図る観点から紙おむつの構成材料であるフィルムおよび
不織布の目付（重量）が低減されるようになってきてい
る。この種の紙おむつく前記（ａ）タイプ〉では、先に
述べたように、合成ゴム系ホットメルト接着剤が使用さ
れるのであるが、このように基材の目付が低減されると
、それがフィルムであれば、その厚みが薄くなる結果、
接着剤中の低分子量物等のしみ出し経路が短くなり、上
記低分子量物等のしみ出しが生じる。また、不織布の場
合では、繊維密度が低下し繊維間の隙間が広くなる結果
、接着剤がその隙間に浸入し、いわば隙間を埋め外部に
露出した状態となることから、接着剤が肌に直接接触し
てかふれを起こす等の問題を生じる。上記しみ出し防止
については低分子量物を低減するということが考えられ
るが、このようにすると、接着力が低下するため、所期
の接着力が得られない。また、繊維間からの接着剤の露
出防止については接着剤の粘度を高める等が考えられる
が、満足できる結果が得られない。Conventionally, hot melt adhesives using synthetic rubber as a base polymer have been used to bond backsheets and topsheets. This synthetic rubber-based hot melt adhesive is sticky even at room temperature and is sticky, but the amount of low molecular weight substances that can be contained in the polymer is extremely high compared to other polymers. Since there is a large amount of polyethylene, it is possible to suppress seepage from porous polyethylene films used to prevent swelling. Recently, in order to make the texture of disposable diapers softer and to reduce costs, the basis weight (weight) of films and nonwoven fabrics that are the constituent materials of disposable diapers has been reduced. Type (a) uses a synthetic rubber hot melt adhesive as mentioned above, but if the basis weight of the base material is reduced in this way, if it is a film, As a result of the thinner thickness,
The seepage path for low molecular weight substances in the adhesive becomes short, causing the low molecular weight substances to seep out. In addition, in the case of non-woven fabrics, as the fiber density decreases and the gaps between the fibers widen, the adhesive infiltrates into the gaps and fills the gaps, leaving them exposed to the outside, allowing the adhesive to directly contact the skin. Contact may cause problems such as rash. In order to prevent the above-mentioned seepage, it is possible to reduce the amount of low-molecular weight substances, but if this is done, the adhesive force will be reduced and the desired adhesive force will not be obtained. Furthermore, in order to prevent the adhesive from being exposed between the fibers, increasing the viscosity of the adhesive can be considered, but satisfactory results cannot be obtained.
また、上記立体ギヤザーは、排泄物の漏れ防止の観点か
ら、不織布で被包した伸縮性材料を立体的に配置し防波
堤構造をつくったものであり、最近のおむつの主流とな
っている。この種のものの根元の接着には、エチレン酢
ピコポリマー（ＥＶＡ）やα−オレフイン系樹脂をベー
スポリマーとし、これに粘着付与樹脂、ワックス類を添
加したＥＶＡ系あるいはα−オレフイン系のホットメル
ト接着剤が使用されている。このホットメルト接着剤は
、溶融時に粘着性を有するものであり、ベースポリマー
は結晶性を有するため、接着後冷却すると、ベースポリ
マーが結晶化（いわばかちかちの状態に固まる）し、タ
ック力を消失する。したがって、冷却後には、接着剤が
直接肌に触れてもかぶれないという特性を有している。In addition, from the viewpoint of preventing the leakage of excrement, the three-dimensional gears have a breakwater structure formed by three-dimensionally arranging stretchable materials covered with non-woven fabric, and have become mainstream in recent diapers. For adhering the base of this type of product, EVA-based or α-olefin-based hot-melt adhesive is used, which uses ethylene vinegar picopolymer (EVA) or α-olefin resin as a base polymer, and adds tackifier resin and waxes to this base polymer. agent is used. This hot melt adhesive is sticky when melted, and the base polymer is crystalline, so when it is cooled after bonding, the base polymer crystallizes (hardens into a sticky state) and loses its tack. do. Therefore, after cooling, the adhesive has the property of not causing a rash even if it comes into direct contact with the skin.
しかしながら、結晶化した後の風合いが固いことから使
用する乳児の肌が擦れてかぶれるという問題が生じる。However, since the texture after crystallization is hard, there is a problem in that the skin of the baby who uses it may get chafed and develop a rash.
風合いを柔らかくするためには、液状可塑剤を添加する
ことが考えられるが、このようにすると、冷却後でもタ
ック力が残り、肌等に悪影響を及ぼす。このように、合
成ゴム系のホットメルト接着剤は、常時に粘着性を有し
ていてべたべたするうえ、低分子量物のしみ出しの問題
を有し、ＥＶＡ系やα−オレフイン系の接着剤は、溶融
時のみ粘着性を呈するが、風合いが固くなるという問題
を有しているのであり、満足しうる性能を有するホット
メルト系接着剤は、未だ存在していないのが実情である
。In order to soften the texture, it may be possible to add a liquid plasticizer, but if this is done, tackiness remains even after cooling, which has a negative effect on the skin. In this way, synthetic rubber-based hot-melt adhesives are always sticky and sticky, and they also have the problem of oozing out low molecular weight substances, while EVA-based and α-olefin-based adhesives Although it exhibits tackiness only when melted, it has the problem of a hard texture, and the reality is that no hot-melt adhesive with satisfactory performance exists yet.
この発明は、このような事情に鑑みなされたもので、低
分子量物のしみ出しがなく、冷却固化後にはタック力が
消失し、しかも風合いに優れたホットメルト接着剤組成
物の提供をその目的とする。The present invention was made in view of the above circumstances, and its purpose is to provide a hot melt adhesive composition that does not seep out of low molecular weight substances, loses tack strength after cooling and solidifying, and has excellent texture. shall be.
上記の目的を達成するため、この発明のホットメルト接
着剤組成物は、α−オレフイン系樹脂。In order to achieve the above object, the hot melt adhesive composition of the present invention comprises an α-olefin resin.
スチレン−エチレン−プロピレン−スチレンブロツク共
重合体（以下ｒｓＥＰｓＪと略す）を主成分とし、粘着
付与樹脂が含有されているホットメルト接着剤組成物と
いう構成をとる。The hot melt adhesive composition has a styrene-ethylene-propylene-styrene block copolymer (hereinafter abbreviated as rsEPsJ) as a main component and contains a tackifying resin.
すなわち、この発明者は、低分子量物質のしみ出しを抑
制し、かつ冷却固化後のタック力が消失する性能を有し
、しかも風合いに優れた接着剤組成物を得るために一連
の研究を重ねた。この研究の過程で、この発明者は、溶
融時に粘着性を有するが、冷却時に数秒単位で固まると
いうα−オレフイン系樹脂の特性に着目し、これを常温
で粘着性を有する上記合成ゴムに混合すると、好結果が
得られるのではないかと着想した。この着想にもとづき
研究を重ね、上記α−オレフイン系樹脂が、合成ゴムに
対する相溶性に欠けているという技術常識を打破し、上
記ホットメルト接着剤組成物のベースポリマーとして、
α−オレフイン系樹脂と合成ゴムである５ＥＰＳとの混
合物を用いたところ、優れた効果が得られることを突き
止めた。そして、上記ベースポリマーを用い、これに粘
着付与樹脂を含有させると、α−オレフイン系樹脂と５
ＥＰＳの両者の長所が発揮されて短所が打ち消され、低
分子量物質のしみ出しが抑制され、かつ冷却固化後にタ
ック力が消失し、しかも被接着体の風合いを固くするこ
とのないホットメルト接着剤が得られることを見出しこ
の発明に到達した。In other words, the inventor conducted a series of studies in order to obtain an adhesive composition that suppresses seepage of low molecular weight substances, eliminates tack force after cooling and solidifying, and has excellent texture. Ta. In the course of this research, the inventor focused on the property of α-olefin resin, which is sticky when melted but solidifies within a few seconds when cooled, and mixed it into the synthetic rubber mentioned above, which is sticky at room temperature. Then, I got the idea that I might be able to get good results. Based on this idea, we conducted repeated research and broke down the conventional wisdom that the α-olefin resin lacks compatibility with synthetic rubber, and developed it as a base polymer for the hot melt adhesive composition.
It has been found that excellent effects can be obtained by using a mixture of α-olefin resin and 5EPS, which is a synthetic rubber. When the above base polymer is used and a tackifier resin is added to it, α-olefin resin and 5
A hot melt adhesive that exhibits the advantages of both EPS and cancels out its disadvantages, suppresses seepage of low molecular weight substances, loses tack force after cooling and solidifying, and does not harden the texture of the adhered object. This invention was achieved by discovering that this can be obtained.
つぎに、この発明の詳細な説明する。Next, this invention will be explained in detail.
この発明のホットメルト接着剤組成物は、αオレフィン
系樹脂、５ＥＰＳおよび粘着付与樹脂を用いて得られる
。The hot melt adhesive composition of this invention is obtained using an alpha olefin resin, 5EPS and a tackifying resin.
上記α−オレフイン系樹脂としては、エチレンプロピレ
ン−１−ブテンの三元共重合体等があげられる。このも
のは、少なくとも４０重量％（以下「％」と略す）、好
適峠は４．５〜６５％のポリプロピレンを含有し結晶化
度が５〜３０％であることが好ましい。溶融粘度および
軟化点については特に限定するものではない。上記α−
オレフイン系樹脂の使用量は、ホットメルト接着剤組成
物全体の１０〜８０％、好ましくは４０〜７５％の範囲
に設定するのが好適である。すなわち、α−オレフイン
系樹脂の配合量が１０％より少ないと結晶化せずタック
力が残り、逆に８０％より多くなると風合いが硬くなる
傾向がみられるからである。Examples of the α-olefin resin include a terpolymer of ethylene propylene-1-butene. It preferably contains at least 40% by weight (hereinafter referred to as "%") of polypropylene, preferably 4.5 to 65%, and has a crystallinity of 5 to 30%. There are no particular limitations on the melt viscosity and softening point. Above α-
The amount of olefin resin used is suitably set in the range of 10 to 80%, preferably 40 to 75% of the total hot melt adhesive composition. That is, if the amount of α-olefin resin blended is less than 10%, it will not crystallize and tack strength will remain, whereas if it is more than 80%, the texture will tend to become hard.
上記５ＥＰＳは、両端のポリマーブロックの間にエチレ
ン構造とプロピレン構造とが混在してなる構造のもので
、例えば、両端のスチレンポリマーブロックの間がイソ
プレンポリマーブロックであるスチレン−イソプレン−
スチレンブロック共重合体のイソプレンポリマ一部分を
水素添加することによって得ることができる。５ＥＰＳ
はポリマー中に含有することのできる低分子量物が極め
て多いため、しみ出しを抑制することができる。The above-mentioned 5EPS has a structure in which an ethylene structure and a propylene structure are mixed between the polymer blocks at both ends. For example, styrene-isoprene-
It can be obtained by hydrogenating a portion of the isoprene polymer of the styrene block copolymer. 5EPS
Since a very large amount of low molecular weight substances can be contained in the polymer, seepage can be suppressed.
また、５ＥＰＳは、α−オレフイン系樹脂と化学構造的
に同骨格を有するため、他の合成ゴム、例えばスチレン
−イソプレン−スチレンブロック共重合体（ＳＩＳ）、
スチレン−ブタジェン−スチレンブロック共！を合体（
ＳＢＳ）、スチレン−エチレン−ブチレン−スチレン共
重合体（Ｓ Ｅ Ｂ Ｓ）等では得られなかったような
、良好なα−オレフイン系樹脂に対する相溶性を有し、
得られる接着剤組成物の低温接着性を大幅に改善すると
いう効果を奏する。このような５ＥＰＳのスチレン含有
量は１０〜３５％の範囲であることが好適である。すな
わち、スチレン含有量が１０％を下回ると冷却後にもタ
ック力が残り、３５％を上回ると低温接着性が低下する
傾向がみられるからである。In addition, since 5EPS has the same chemical structure as α-olefin resin, other synthetic rubbers such as styrene-isoprene-styrene block copolymer (SIS),
Styrene-butadiene-styrene blocks! Combine (
It has good compatibility with α-olefin resins, which could not be obtained with styrene-ethylene-butylene-styrene copolymers (SEBS), etc.
This has the effect of significantly improving the low-temperature adhesion of the resulting adhesive composition. The styrene content of such 5EPS is preferably in the range of 10 to 35%. That is, if the styrene content is less than 10%, tack strength remains even after cooling, and if it exceeds 35%, there is a tendency for low-temperature adhesion to decrease.
さらに、５ＥＰＳの配合量は、１〜５０％、好ましくは
５〜３０％の範囲内に設定するのが好適である。すなわ
ち、上記１％を上回ると相溶性が悪化し、逆に５０％を
下回ると低温接着性および風合いが悪化する傾向がみら
れるからである。Further, the amount of 5EPS blended is preferably set within the range of 1 to 50%, preferably 5 to 30%. That is, if it exceeds 1%, the compatibility tends to deteriorate, and if it falls below 50%, low-temperature adhesion and texture tend to deteriorate.
上記粘着付与樹脂としては、特に限定するものではな（
、通常のホットメルト接着剤組成物に用いられるもので
あればどのようなものであっても用いることができる。The above tackifier resin is not particularly limited (
Any adhesive used in conventional hot melt adhesive compositions can be used.
例えば、水・素添加された芳香族系石油樹脂、水素添加
された脂肪族系石油樹脂、水素添加されたテルペン系樹
脂等の水素添加された樹脂を用いるのが好ましい。すな
わち、水素添加することによって化学構造上、二重結合
が極端に少なくなることから、熱に対する安定性が増加
し、経時劣化による色相の変化や臭気の問題がなくなる
からである。このような粘着付与樹脂は、いずれも上記
α−オレフイン系樹脂および５ＥＰＳに対する相溶性に
優れているため、その使用によって接着性が阻害される
ことはない。なお、上記粘着付与樹脂の軟化温度は、特
に限定されるものではなく、常温で固体であっても液体
であってもよい。特に、液体のものは可塑剤としての効
果を有することから好ましい。このような粘着付与樹脂
の配合量は、組成物全体の２０〜６０％の範囲内に設定
するのが好ましく、特に好ましいのは３０〜５０％であ
る。すなわち、粘着付与樹脂の配合量が６０％を超える
と風合いが硬くなるとともに低温接着性が悪化し、２０
％を下回ると被着体に対する濡れ性が低下して初期接着
力が悪くなる１頃向がみられるからである。For example, it is preferable to use a hydrogenated resin such as a hydrogenated aromatic petroleum resin, a hydrogenated aliphatic petroleum resin, or a hydrogenated terpene resin. That is, hydrogenation significantly reduces the number of double bonds in the chemical structure, which increases stability against heat and eliminates problems such as changes in hue and odor caused by deterioration over time. Since all of these tackifier resins have excellent compatibility with the above-mentioned α-olefin resin and 5EPS, their use does not impair adhesiveness. The softening temperature of the tackifying resin is not particularly limited, and it may be solid or liquid at room temperature. Particularly, liquid ones are preferable because they have an effect as a plasticizer. The amount of such tackifying resin blended is preferably set within the range of 20 to 60% of the total composition, and particularly preferably 30 to 50%. That is, when the amount of the tackifying resin exceeds 60%, the texture becomes hard and low temperature adhesion deteriorates.
%, the wettability to the adherend decreases and the initial adhesion strength tends to deteriorate.
さら↓こ、上記α−オレフイン系樹脂、５ＥＰＳ。Sara↓ko, the above α-olefin resin, 5EPS.
粘着付与樹脂以外に、必要に応じて可塑剤を配合しても
よい。上記可塑剤としては、ホットメルト接着剤組成物
に使用されるものであれば特に限定するものではな〈従
来公知のものが用いられ、例えば、可塑化オイル等があ
げられる。このような可塑剤は、液状であってもまた固
体状であっても差し支えない。また、可塑剤の配合量は
接着剤の固化時間および固化後のタック力という観点か
ら１〜２０％、好ましくは３〜１５％の範囲に設定する
ことが好適である。In addition to the tackifying resin, a plasticizer may be added as necessary. The above-mentioned plasticizer is not particularly limited as long as it is used in hot melt adhesive compositions. Conventionally known plasticizers may be used, such as plasticizing oil. Such plasticizers may be either liquid or solid. Further, from the viewpoint of the solidifying time of the adhesive and the tack strength after solidifying, the amount of the plasticizer is preferably set in the range of 1 to 20%, preferably 3 to 15%.
なお、この発明のホットメルト接着剤組成物には、上記
成分以外には、従来公知の酸化防止剤。In addition to the above-mentioned components, the hot melt adhesive composition of the present invention contains a conventionally known antioxidant.
安定剤、充填剤および顔料等の添加剤を必要に応じて適
宜選択し配合することができ、それぞれ単独でもしくは
併せて用いることができる。さらに、上記添加□剤に加
えて各種の熱可塑性高分子化合物を添加することもでき
る。Additives such as stabilizers, fillers, and pigments can be appropriately selected and blended as necessary, and each can be used alone or in combination. Furthermore, in addition to the above-mentioned additives, various thermoplastic polymer compounds can also be added.
この発明のホットメルト接着剤組成物は、例えば上記各
原料を、溶融撹拌混合釜に入れて加熱混合すること等に
よって得られる。The hot-melt adhesive composition of the present invention can be obtained, for example, by placing the above-mentioned raw materials in a melt-stirring mixing pot and heating and mixing them.
つぎに、この発明の実施例を比較例と併せて説明する。Next, examples of the present invention will be described together with comparative examples.
〔実施例１〜９〕
下記の第１表に示す原料を下記の組成にしたがって配合
し、約１５０”Ｃで溶融混練することにより、目的とす
るホットメルト接着剤組成物を得た。[Examples 1 to 9] The desired hot melt adhesive compositions were obtained by blending the raw materials shown in Table 1 below according to the compositions below and melting and kneading them at about 150''C.
（余 白 ）
つぎに、上記各実施別品の特性を下記の方法で測定し、
その結果を後記の第２表に示した。(Margin) Next, the characteristics of each of the above-mentioned products were measured using the following method.
The results are shown in Table 2 below.
〈接着性〉
紙おむつに主として使用されているポリエチレンフィル
ムと不織布、あるいは不織布と不織布を上記実施別品を
用いて接着した（塗布温度１２０〜１５０°Ｃ２塗布量
０．０５ｇ１５ｃｄ、ビード状）。<Adhesion> A polyethylene film and a nonwoven fabric, or a nonwoven fabric and a nonwoven fabric, which are mainly used in disposable diapers, were bonded using the above-mentioned product (coating temperature: 120 to 150°C, coating amount: 0.05 g, 15 cd, bead shape).
これを２０℃の温度雰囲気下に２４時間放置したのち取
り出し、手で被着体を引き剥がし、材料破断の場合をＯ
１界面剥離の場合を×、その中間を△として評価した。After leaving this in an atmosphere at a temperature of 20°C for 24 hours, take it out, peel off the adherend by hand, and check for material breakage with O
The case of 1 interfacial peeling was evaluated as ×, and the case in between was evaluated as △.
〈タック力〉
５０μｍのポリエステルフィルムにホットメルト接着剤
を５０μｍ１ｆｉ布した。これを２５ｍａＸ１２５ｍｎ
に切断したものをテスト試料とし接着剤面を外側にして
ループ状にした。このサンプルを２０℃雰囲気下、３０
０ ｍ／ｗｉｎで２５ｏｎ幅の被着体（ポリエチレン板
）に接着させ同スピードで引っ張り上げたときの力を測
定した。今回は塗布直後と塗布１時間後で測定しサンプ
ル数は各々５個としその平均を測定値とした。<Tack force> A 50 μm thick layer of hot melt adhesive was applied to a 50 μm polyester film. This is 25maX125mn
The sample was cut into a loop shape with the adhesive side facing outward. This sample was heated for 30 minutes in an atmosphere of 20℃.
The force was measured when the adhesive was adhered to a 25 on width adherend (polyethylene plate) at 0 m/win and pulled up at the same speed. This time, measurements were taken immediately after application and 1 hour after application, and the number of samples was 5 each, and the average was taken as the measured value.
〈硬度〉
２０℃温度雰囲気下で直径６５閣、深さ１２１１Ｉ１１
のリングに溶融した接着剤を流し込み冷却固化後所定の
硬度針で測定した（ＪＩＳ Ｋ ６３０１に準拠）。<Hardness> Diameter 65mm, depth 1211I11 under 20℃ temperature atmosphere
The molten adhesive was poured into the ring, cooled and solidified, and then the hardness was measured using a specified hardness needle (according to JIS K 6301).
くしみ出し性〉
５０μｍのポリエステルフィルムにホットメルト接着剤
を５０μｍを塗布する。これをテスト試料とし市販の３
０ｇ／ｃ４の多孔質ポリエチレンフィルムと張り合わせ
、６０℃で１週間放置した。Squeezing property> Apply 50 μm of hot melt adhesive to a 50 μm polyester film. Using this as a test sample, commercially available 3
It was laminated with a porous polyethylene film of 0 g/c4 and left at 60° C. for one week.
そして、取り出し後のしみ出し度合いを目視で判定した
。全くしみ出さずフィルムの隠蔽性が確保されている場
合を○、完全にしみ出した場合を×。Then, the degree of seepage after removal was visually determined. ○ indicates that the film does not seep out at all and the concealing properties of the film are ensured; × indicates that it completely seeps out.
その中間をΔとした。The middle point was set as Δ.
〈熱安定性〉
■ 粘度低下率
まず、１８０℃の温度雰囲気下で上記実施別品を７２時
間放置し、その前後の粘度を測定して粘度低下率を算出
し、これを熱安定性の指標とした。<Thermal Stability> ■ Viscosity Reduction Rate First, the above-mentioned product was left in an atmosphere at a temperature of 180°C for 72 hours, and the viscosity before and after that was measured to calculate the viscosity reduction rate, which was used as an index of thermal stability. And so.
すなわち、算出式は、下記のとおりである。That is, the calculation formula is as follows.
Ｖ ＝１８０°Ｃ９７２時間放置後のホットメルト接着
剤組成物の１６０°Ｃでの溶融粘度
■ｏ ：熱履歴を受ける前のホットメルト接着剤組成物
の１６０″Ｃでの溶融粘度
■ 色相
また、ホットメルト接着剤組成物を１８０°Ｃ温度雰囲
気下に７２時間放置し、その時点での組成物の色相を目
視で判定した。完全に無色あるいは白色の場合を○、や
や着色のある場合を△、明らかに着色のある場合を×と
した。V = Melt viscosity at 160°C of the hot melt adhesive composition after standing for 972 hours at 180°C ■o: Melt viscosity at 160"C of the hot melt adhesive composition before undergoing thermal history ■ Hue The hot melt adhesive composition was left in an atmosphere at a temperature of 180°C for 72 hours, and the hue of the composition at that point was visually judged.Completely colorless or white is ○, and slightly colored is △. , Cases with obvious coloring were marked as ×.
■ 臭気
同じくホットメルト接着剤組成物を１８０°Ｃ温度雰囲
気下に７２時間放置し、その時点での組成物の臭気を官
能テスト（パネラ−１０名）によって評価した。無臭の
場合を○、やや臭気のある場合を△、明らかに臭気のあ
る場合を×とした。(2) Odor Similarly, the hot melt adhesive composition was left in an atmosphere at a temperature of 180° C. for 72 hours, and the odor of the composition at that point was evaluated by a sensory test (10 panelists). The case where there was no odor was rated as ○, the case with a slight odor was rated as △, and the case with a distinct odor was rated as ×.
（余 白 ）
〔比較例１〜９〕
また、現在市場で売られている衛生材料用のホットメル
ト接着剤組成物も含め、樹脂成分の種類の異なるものを
９種類用意した。これらの組成を後記の第３表に示す。(Margin) [Comparative Examples 1 to 9] Nine types of adhesive compositions with different resin components were prepared, including hot melt adhesive compositions for sanitary materials currently sold on the market. Their compositions are shown in Table 3 below.
そして、上記各比較別品について、上記実施別品と同様
にしてその特性評価を行った。その結果を下記の第４表
に示す。The characteristics of each comparative product were evaluated in the same manner as the tested product. The results are shown in Table 4 below.
（以下余白）
上記第４表の結果から、比較別品は、接着性タック力、
しみ出し性のいずれかの項目において好ましくない特性
を示している。また、比較例７゜８．９品では、ベース
ポリマーが相溶せず特性を測定できなかった。これに対
し、実施別品は、前記第２表の結果に示されるとおり、
どの項目においても優れた特性を示していることがわか
る。(Left below) From the results in Table 4 above, the comparative products have adhesive tack strength,
Shows unfavorable characteristics in any of the exudation properties. Furthermore, in the product of Comparative Example 7°8.9, the base polymers were not compatible and the characteristics could not be measured. On the other hand, as shown in the results of Table 2 above,
It can be seen that it exhibits excellent characteristics in all items.
なお、上記の説明は紙おむつを対象としているが、この
発明の接着剤組成物は紙おむつだけでなく、生理用ナプ
キン等広い範囲の衛生用品に応用可能である。Although the above description is directed to paper diapers, the adhesive composition of the present invention is applicable not only to paper diapers but also to a wide range of sanitary products such as sanitary napkins.
以上のように、本発明のホットメルト接着剤組成物は、
α−オレフイン系樹脂および５ＥＰＳをベースポリマー
とし、粘着付与樹脂を含有している。したがって、熱溶
融時には強いタック力を有し冷却固化するにしたがい徐
々にタック力が消失し最終的には実質上皆無となるため
、従来のようにタック力に起因するかぶれが生じない。As mentioned above, the hot melt adhesive composition of the present invention is
The base polymer is α-olefin resin and 5EPS, and contains a tackifying resin. Therefore, it has a strong tack force when hot melted, and as it cools and solidifies, the tack force gradually disappears and finally becomes virtually nonexistent, so that rashes caused by the tack force do not occur as in the conventional case.
また、５ＥＰＳを有するため、低分子量物のしみ出しも
なく、低温から高温まで幅広い接着力が得られる。Furthermore, since it has 5 EPS, there is no seepage of low molecular weight substances, and a wide range of adhesive strength can be obtained from low to high temperatures.
さらに、良好な風合いが得られ、組成物が実質的に無色
であり、加熱によっても着色せず異臭も生じないため、
衛生材料の組み立てに用いるのに最適である。Furthermore, a good texture is obtained, and the composition is substantially colorless and does not become colored or produce any strange odor even when heated.
Ideal for use in assembling sanitary materials.
Claims (5)
ロピレン−スチレンブロツク共重合体を主成分とし、粘
着付与樹脂が含有されていることを特徴とするホツトメ
ルト接着剤組成物。(1) A hot melt adhesive composition comprising an α-olefin resin, a styrene-ethylene-propylene-styrene block copolymer as the main components, and a tackifier resin.
れ、スチレン−エチレン−プロピレン−スチレンブロツ
ク共重合体が１〜３５重量％含有され、粘着付与樹脂が
２０〜６０重量％含有されている請求項（１）記載のホ
ツトメルト接着剤組成物。(2) Contains 10 to 80% by weight of α-olefin resin, 1 to 35% by weight of styrene-ethylene-propylene-styrene block copolymer, and 20 to 60% by weight of tackifying resin. The hot melt adhesive composition according to claim (1).
リプロピレンからなる請求項（１）または（２）記載の
ホツトメルト接着剤組成物。(3) The hot melt adhesive composition of claim (1) or (2), wherein the α-olefin resin comprises at least 40% by weight of polypropylene.
ツク共重合体のスチレン含有量が１０〜３５重量％であ
る請求項（１）ないし（３）のいずれか一項に記載のホ
ツトメルト接着剤組成物。(4) The hot melt adhesive composition according to any one of claims (1) to (3), wherein the styrene content of the styrene-ethylene-propylene-styrene block copolymer is 10 to 35% by weight.
し（４）のいずれか一項に記載のホツトメルト接着剤組
成物。(5) The hot melt adhesive composition according to any one of claims (1) to (4), which contains a plasticizing oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2188665A JP2716247B2 (en) | 1990-07-16 | 1990-07-16 | Hot melt adhesive composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2188665A JP2716247B2 (en) | 1990-07-16 | 1990-07-16 | Hot melt adhesive composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0477591A true JPH0477591A (en) | 1992-03-11 |
| JP2716247B2 JP2716247B2 (en) | 1998-02-18 |
Family
ID=16227710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2188665A Expired - Fee Related JP2716247B2 (en) | 1990-07-16 | 1990-07-16 | Hot melt adhesive composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2716247B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5703162A (en) * | 1994-05-05 | 1997-12-30 | H. B. Fuller Licensing & Financing, Inc. | Branched copolymer pressure sensitive hot melt adhesive |
| US5738669A (en) * | 1994-04-12 | 1998-04-14 | Kao Corporation | Absorbent article |
| EP0993832A1 (en) * | 1998-10-16 | 2000-04-19 | The Procter & Gamble Company | Absorbent article comprising a microporous film with an adhesive layer |
| KR100625044B1 (en) * | 2004-11-29 | 2006-09-18 | 금호석유화학 주식회사 | Thermoplastic elastomer composition with low hardness |
| JP2007014538A (en) * | 2005-07-07 | 2007-01-25 | Livedo Corporation | Disposable absorptive article |
| JP4602521B2 (en) * | 2000-07-11 | 2010-12-22 | 櫻護謨株式会社 | hose |
| WO2013039263A1 (en) * | 2011-09-16 | 2013-03-21 | Henkel Ag & Co. Kgaa | Hot melt adhesive |
| CN106189931A (en) * | 2016-08-10 | 2016-12-07 | 北京光辉世纪工贸有限公司 | A kind of hot-fusible high-molecular glue and preparation technology thereof and application |
| US9758704B2 (en) | 2012-08-28 | 2017-09-12 | Henkel Ag & Co. Kgaa | Hot melt adhesive |
| US9816014B2 (en) | 2011-09-16 | 2017-11-14 | Henkel Ag & Co. Kgaa | Hot melt adhesive for disposable products |
-
1990
- 1990-07-16 JP JP2188665A patent/JP2716247B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5738669A (en) * | 1994-04-12 | 1998-04-14 | Kao Corporation | Absorbent article |
| US5703162A (en) * | 1994-05-05 | 1997-12-30 | H. B. Fuller Licensing & Financing, Inc. | Branched copolymer pressure sensitive hot melt adhesive |
| EP0993832A1 (en) * | 1998-10-16 | 2000-04-19 | The Procter & Gamble Company | Absorbent article comprising a microporous film with an adhesive layer |
| WO2000023122A1 (en) * | 1998-10-16 | 2000-04-27 | The Procter & Gamble Company | Absorbent article with microporous film and adhesive |
| JP4602521B2 (en) * | 2000-07-11 | 2010-12-22 | 櫻護謨株式会社 | hose |
| KR100625044B1 (en) * | 2004-11-29 | 2006-09-18 | 금호석유화학 주식회사 | Thermoplastic elastomer composition with low hardness |
| JP2007014538A (en) * | 2005-07-07 | 2007-01-25 | Livedo Corporation | Disposable absorptive article |
| WO2013039263A1 (en) * | 2011-09-16 | 2013-03-21 | Henkel Ag & Co. Kgaa | Hot melt adhesive |
| RU2613965C2 (en) * | 2011-09-16 | 2017-03-22 | Хенкель Аг Унд Ко. Кгаа | Hot-melt adhesive |
| US9816014B2 (en) | 2011-09-16 | 2017-11-14 | Henkel Ag & Co. Kgaa | Hot melt adhesive for disposable products |
| US9822283B2 (en) | 2011-09-16 | 2017-11-21 | Henkel Ag & Co. Kgaa | Hot melt adhesive |
| US9758704B2 (en) | 2012-08-28 | 2017-09-12 | Henkel Ag & Co. Kgaa | Hot melt adhesive |
| CN106189931A (en) * | 2016-08-10 | 2016-12-07 | 北京光辉世纪工贸有限公司 | A kind of hot-fusible high-molecular glue and preparation technology thereof and application |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2716247B2 (en) | 1998-02-18 |
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