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JP6970905B2 - A method for manufacturing a water-repellent laminate for a lid material, a lid material, a container, and a water-repellent laminate for a lid material. - Google Patents
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JP6970905B2 - A method for manufacturing a water-repellent laminate for a lid material, a lid material, a container, and a water-repellent laminate for a lid material. - Google Patents

A method for manufacturing a water-repellent laminate for a lid material, a lid material, a container, and a water-repellent laminate for a lid material. Download PDF

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JP6970905B2
JP6970905B2 JP2016125857A JP2016125857A JP6970905B2 JP 6970905 B2 JP6970905 B2 JP 6970905B2 JP 2016125857 A JP2016125857 A JP 2016125857A JP 2016125857 A JP2016125857 A JP 2016125857A JP 6970905 B2 JP6970905 B2 JP 6970905B2
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water
thermoplastic resin
repellent
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lid material
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JP2017226472A (en
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城 翔 三 結
田 新 山
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Dai Nippon Printing Co Ltd
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Description

本発明は、蓋材用撥水性積層体、蓋材、容器および蓋材用撥水性積層体の製造方法に関する。 The present invention relates to a water-repellent laminate for a lid material, a lid material, a container, and a method for manufacturing a water-repellent laminate for a lid material.

食品、飲料、医薬品、および化学品等の多くの商品分野では、それぞれの内容物に応じた包装材料が開発されている。特に、液体や半固体、ゲル状物質等粘性を有する内容物を包装するための包装材料としては、耐水性、耐油性、ガスバリア性、防湿性、軽量、フレキシブル性および意匠性等に優れるプラスチック材料が用いられ、包装材料に求められる内容物の保護に対して機能している。 In many product fields such as foods, beverages, pharmaceuticals, and chemicals, packaging materials according to their contents have been developed. In particular, as a packaging material for packaging viscous contents such as liquids, semi-solids, and gel-like substances, a plastic material having excellent water resistance, oil resistance, gas barrier property, moisture resistance, light weight, flexibility, designability, etc. Is used and functions to protect the contents required for packaging materials.

包装材料の機能として、液体や半固体、ゲル状物質等高い粘性を有する内容物の包装材料への付着を防止することのできる付着防止機能が求められている。 As a function of the packaging material, an adhesion prevention function capable of preventing adhesion of highly viscous contents such as liquids, semi-solids, and gel-like substances to the packaging material is required.

例えば、基材の片面に、熱接着層と、疎水性微粒子および熱可塑性バインダー樹脂を含んでなる付着防止層とを備える蓋材用積層体ことが提案されている(特許文献1を参照)。 For example, a laminate for a lid material having a heat-adhesive layer and an adhesion-preventing layer containing hydrophobic fine particles and a thermoplastic binder resin on one side of a base material has been proposed (see Patent Document 1).

特許第5490574号公報Japanese Patent No. 5490574

しかしながら、特許文献1において提案される蓋材は、熱接着層に含まれるヒートシール剤の種類によっては、付着防止層の形成の際に、付着防止層用塗工液に含まれる有機溶剤により浸食(反応)されてしまい、付着防止層に含まれる疎水性微粒子が、熱接着層側に相対的に移動してしまい、十分な付着防止性および撥水性を発揮することができないことを知見した。
また、付着防止層に大きさの異なる2種類の粒子を含有させることにより、付着防止性および撥水性をより顕著に向上させることができることを知見した。
However, depending on the type of heat sealant contained in the heat-adhesive layer, the lid material proposed in Patent Document 1 is eroded by the organic solvent contained in the coating liquid for the adhesion-preventing layer when the adhesion-preventing layer is formed. It was found that the hydrophobic fine particles contained in the adhesion-preventing layer were (reacted) and moved relatively to the heat-adhesion layer side, and could not exhibit sufficient adhesion-prevention and water repellency.
It was also found that the adhesion prevention property and the water repellency can be more remarkably improved by containing two kinds of particles having different sizes in the adhesion prevention layer.

本発明は、上記新たな課題を解決するためになされたものであって、付着防止層に含まれる微粒子の移動を防止することができ、より高い付着防止性および撥水性を有する蓋材用撥水性積層体を提供することをその目的とする。 The present invention has been made to solve the above-mentioned new problems, and can prevent the movement of fine particles contained in the adhesion prevention layer, and has higher adhesion prevention property and water repellency for a lid material. It is an object of the present invention to provide an aqueous laminate.

本発明の蓋材用撥水性積層体は、基材と、熱接着層と、付着防止層と、をこの順に備え、
前記熱接着層が、水系熱可塑性樹脂を含み、付着防止層が、熱可塑性樹脂、撥水性微粒子および撥水性微粒子よりも平均粒子径の大きいビーズ粒子を含むことを特徴とする。
The water-repellent laminate for a lid material of the present invention comprises a base material, a heat-adhesive layer, and an adhesion-preventing layer in this order.
The heat-adhesive layer contains a water-based thermoplastic resin, and the adhesion-preventing layer contains bead particles having a larger average particle size than the thermoplastic resin, water-repellent fine particles, and water-repellent fine particles.

上記態様においては、水分散型のヒートシール剤が、ビニル系樹脂、オレフィン系樹脂、アクリル系樹脂およびポリエステル系樹脂から選択される水分散型の熱可塑性樹脂を含むことが好ましい。 In the above aspect, it is preferable that the water-dispersible heat sealant contains a water-dispersible thermoplastic resin selected from vinyl-based resins, olefin-based resins, acrylic-based resins and polyester-based resins.

上記態様においては、熱接着層における水系熱可塑性樹脂の含有量が、50質量%以上、90質量%以下であることが好ましい。 In the above aspect, the content of the water-based thermoplastic resin in the heat-bonded layer is preferably 50% by mass or more and 90% by mass or less.

上記態様においては、撥水性微粒子の平均粒子径が、1nm以上、300nm以下であることが好ましい。 In the above embodiment, the average particle size of the water-repellent fine particles is preferably 1 nm or more and 300 nm or less.

上記態様においては、ビーズ粒子の平均粒子径が、1μm以上、50μm以下であることが好ましい。 In the above embodiment, the average particle size of the bead particles is preferably 1 μm or more and 50 μm or less.

上記態様においては、付着防止層における熱可塑性樹脂の含有量と、撥水性微粒子および前記ビーズ粒子の含有量との比が、質量基準で、2:1〜1:5であることが好ましい。 In the above embodiment, the ratio of the content of the thermoplastic resin in the adhesion prevention layer to the content of the water-repellent fine particles and the bead particles is preferably 2: 1 to 1: 5 on a mass basis.

本発明の蓋材は、上記蓋材用撥水性積層体からなることを特徴とする。 The lid material of the present invention is characterized by being made of the water-repellent laminate for the lid material.

本発明の容器は、上記蓋材と、容器本体を備え、蓋材の熱接着層と、容器本体とが、ヒートシールされてなることを特徴とする。 The container of the present invention includes the above-mentioned lid material and a container main body, and is characterized in that the heat-bonding layer of the lid material and the container main body are heat-sealed.

本発明の蓋材用撥水性積層体は、基材を準備する工程と、基材上に、水系熱可塑性樹脂および水を含む熱接着層用塗工液を塗布、乾燥し、熱接着層を形成させる工程と、熱接着層上に、熱可塑性樹脂、撥水性微粒子、前記撥水性微粒子よりも平均粒子径の大きいビーズ粒子および有機溶剤を含む付着防止層用塗工液を塗布、乾燥し、付着防止層を形成させる工程と、を含むことを特徴とする。 In the water-repellent laminate for lid material of the present invention, a step of preparing a base material and a coating liquid for a heat-adhesive layer containing a water-based thermoplastic resin and water are applied and dried on the base material to form a heat-adhesive layer. In the step of forming, a coating liquid for an adhesion-preventing layer containing a thermoplastic resin, water-repellent fine particles, bead particles having an average particle diameter larger than that of the water-repellent fine particles, and an organic solvent is applied and dried on the heat-adhesive layer. It is characterized by including a step of forming an adhesion prevention layer.

本発明によれば、付着防止層に含まれる微粒子の移動を防止することができ、より高い付着防止性および撥水性を有する蓋材用撥水性積層体を提供することができる。また、本発明によれば、摩擦によっても、撥水性微粒子が滑落しない、高い耐擦過性を有する蓋材用撥水性積層体を提供することができる。 According to the present invention, it is possible to prevent the movement of fine particles contained in the adhesion prevention layer, and it is possible to provide a water-repellent laminate for a lid material having higher adhesion prevention property and water repellency. Further, according to the present invention, it is possible to provide a water-repellent laminate for a lid material having high scratch resistance so that the water-repellent fine particles do not slip off even by friction.

本発明の一実施形態による蓋材用撥水性積層体の断面模式図である。It is sectional drawing of the water-repellent laminated body for a lid material by one Embodiment of this invention. 本発明の一実施形態による容器の断面模式図である。It is sectional drawing of the container by one Embodiment of this invention.

<蓋材用撥水性積層体>
本発明の実施の形態を図面を参照しながら説明する。図1は、本発明の実施形態による蓋材用撥水性積層体の断面模式図を示したものである。一実施形態において、蓋材用撥水性積層体10は、基材11と、水系熱可塑性樹脂を含む熱接着層12と、撥水性微粒子13およびビーズ粒子14を含む付着防止層15とを備えてなる。以下、本発明による蓋材用撥水性積層体を構成する各層について説明する。
<Water-repellent laminate for lid material>
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic cross-sectional view of a water-repellent laminate for a lid material according to an embodiment of the present invention. In one embodiment, the water-repellent laminate 10 for a lid material includes a base material 11, a heat-adhesive layer 12 containing a water-based thermoplastic resin, and an adhesion-preventing layer 15 containing water-repellent fine particles 13 and bead particles 14. Become. Hereinafter, each layer constituting the water-repellent laminate for a lid material according to the present invention will be described.

(基材)
基材として、コート紙、印刷用紙、上質紙およびクラフト紙等の紙材であったり、ポリプロピレン、ポリアミドおよびポリエチレンテレフタレート(PET)等のポリエステル等の樹脂からなるフィルム、もしくはアルミニウム箔等の金属から成る金属箔を使用することができる。また、基材が酸素および水蒸気に対するバリア層としての機能を発揮することができるため、紙材やフィルムに対し、アルミニウムや酸化珪素、酸化チタン、酸化アルミニウム等の無機酸化物を蒸着することが好ましい。また、基材の遮光性を向上させることができるため好ましい。また、上記した紙材と、フィルムとの積層材を基材として用いてもよい。積層方法は、特に限定されず、ドライラミネート法、ウェットラミネート法、ヒートラミネート法等を用いることができる。
(Base material)
The base material is a paper material such as coated paper, printing paper, high-quality paper and kraft paper, a film made of a resin such as polypropylene such as polypropylene, polyamide and polyethylene terephthalate (PET), or a metal such as aluminum foil. Metal foil can be used. Further, since the base material can function as a barrier layer against oxygen and water vapor, it is preferable to deposit an inorganic oxide such as aluminum, silicon oxide, titanium oxide, or aluminum oxide on the paper material or film. .. Further, it is preferable because the light-shielding property of the base material can be improved. Further, the above-mentioned laminated material of the paper material and the film may be used as a base material. The laminating method is not particularly limited, and a dry laminating method, a wet laminating method, a heat laminating method, or the like can be used.

基材には、従来公知の印刷インキを用いた印刷が施されていてもよい。印刷の方式も特に限定されるものではなく、グラビア印刷、フレキソ印刷、スクリーン印刷等の従来公知の方式を用いることができる。 The base material may be printed using a conventionally known printing ink. The printing method is not particularly limited, and conventionally known methods such as gravure printing, flexographic printing, and screen printing can be used.

基材の厚さは、特に限定されるものではないが、例えば、5μm以上、200μm以下とすることができる。 The thickness of the base material is not particularly limited, but can be, for example, 5 μm or more and 200 μm or less.

(熱接着層)
本発明による蓋材用撥水性積層体は、基材と付着防止層との間に、水系熱可塑性樹脂を含む熱接着層を備える。
熱接着層における水系熱可塑性樹脂の含有量は、50質量%以上、99質量%以下であることが好ましく、60質量%以上、99質量%以下であることがより好ましい。
熱接着層が水系熱可塑性樹脂を含むことにより、付着防止層形成の際に付着防止層用塗工液に含まれる有機溶剤によって浸食されず、付着防止層に含まれる粒子の熱接着層側への移動を防止することができ、十分な付着防止性および撥水性を発揮させることができる。
なお、本発明において、「水系熱可塑性樹脂」とは、水に溶解または分散する熱可塑性樹脂のことをいう。
(Thermal adhesive layer)
The water-repellent laminate for a lid material according to the present invention includes a heat-adhesive layer containing a water-based thermoplastic resin between the base material and the adhesion-preventing layer.
The content of the water-based thermoplastic resin in the heat-bonded layer is preferably 50% by mass or more and 99% by mass or less, and more preferably 60% by mass or more and 99% by mass or less.
Since the heat-bonding layer contains a water-based thermoplastic resin, it is not eroded by the organic solvent contained in the coating liquid for the adhesion-preventing layer when the adhesion-preventing layer is formed, and the particles contained in the adhesion-preventing layer move to the heat-bonding layer side. Can be prevented from moving, and sufficient adhesion prevention property and water repellency can be exhibited.
In the present invention, the "aqueous thermoplastic resin" refers to a thermoplastic resin that is dissolved or dispersed in water.

水系熱可塑性樹脂としては、例えば、エチレン−酢酸ビニル共重合体、変性エチレン−酢酸ビニル共重合体等のビニル系樹脂、エチレン−α−オレフィン共重合体等のオレフィン系樹脂、アクリル系樹脂、ポリエステル系樹脂、アルキド系樹脂、ポリウレタン系樹脂、アクリルウレタン系樹脂、フッ素系樹脂、エポキシ系樹脂、フェノール系樹脂、メラミン系樹脂、セルロース系樹脂等を挙げることができ、これら樹脂を1種または2種以上含むことができる。 Examples of the aqueous thermoplastic resin include vinyl resins such as ethylene-vinyl acetate copolymers and modified ethylene-vinyl acetate copolymers, olefin resins such as ethylene-α-olefin copolymers, acrylic resins, and polyesters. Examples thereof include based resins, alkyd resins, polyurethane resins, acrylic urethane resins, fluororesins, epoxy resins, phenol resins, melamine resins, cellulose resins, etc., and these resins are classified into one or two types. The above can be included.

水系熱可塑性樹脂は、親水性基を樹脂骨格に導入する自己乳化法等の従来公知の方法により作製することができる。また、市販されている水系熱可塑性樹脂を使用してもよく、例えば、日栄化工株式会社製のHC−037、HC−080、ジャパンコーティングレジン株式会社製のアクアテックスEC−1800、アクアテックスEC−3500、アクアテックスEC−3700等のように水系熱可塑性樹脂および水を含むインキ組成物等が挙げられる。
なお、熱接着層は、本発明の特性を損なわない範囲において、水系熱可塑性樹脂以外の樹脂を含むことができる。
The aqueous thermoplastic resin can be produced by a conventionally known method such as a self-emulsifying method in which a hydrophilic group is introduced into the resin skeleton. Further, a commercially available water-based thermoplastic resin may be used, for example, HC-037 and HC-080 manufactured by Niei Kako Co., Ltd., Aquatex EC-1800 manufactured by Japan Coating Resin Co., Ltd., and Aquatex EC-. Examples thereof include an ink composition containing a water-based thermoplastic resin and water such as 3500 and Aquatex EC-3700.
The heat-adhesive layer may contain a resin other than the water-based thermoplastic resin as long as the characteristics of the present invention are not impaired.

(付着防止層)
本発明による蓋材用撥水性積層体は、熱可塑性樹脂、撥水性微粒子および前記撥水性微粒子よりも平均粒子径の大きいビーズ粒子を含んでなる付着防止層をその最外面に備えてなる。このように付着防止層が大きさの異なる2種類の粒子を含んでなるため、表面に特有の凹凸構造が形成され、粘性を有する内容物の付着防止性および撥水性を顕著に向上させることができる。また、撥水性微粒子よりも平均粒子径の大きいビーズ粒子を含んでなるため、熱接着層の耐擦過性を向上させることもでき、摩擦による撥水性微粒子の滑落を防止することができる。
(Adhesion prevention layer)
The water-repellent laminate for a lid material according to the present invention is provided with an adhesion-preventing layer containing a thermoplastic resin, water-repellent fine particles, and bead particles having a larger average particle size than the water-repellent fine particles on the outermost surface thereof. Since the adhesion prevention layer contains two types of particles having different sizes, an uneven structure peculiar to the surface is formed, and the adhesion prevention property and water repellency of the viscous contents can be remarkably improved. can. Further, since the beads particles having an average particle diameter larger than that of the water-repellent fine particles are contained, the scratch resistance of the heat-adhesive layer can be improved, and the water-repellent fine particles can be prevented from slipping off due to friction.

付着防止層に含まれる熱可塑性樹脂としては、低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、線状低密度ポリエチレンおよびポリプロピレン等のポリオレフィン樹脂、ポリ(メタ)アクリル樹脂ポリエステル樹脂、アイオノマー樹脂、エチレン−アクリル酸共重合体、エチレン−アクリル酸エチル共重合体、エチレン−メタクリル酸共重合体、エチレン−メタクリル酸エチル共重合体、ポリスチレン樹脂、塩化ビニル−酢酸ビニル共重合体等のビニル樹脂等が挙げられる。 Examples of the thermoplastic resin contained in the adhesion prevention layer include polyolefin resins such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene and polypropylene, poly (meth) acrylic resin polyester resin, ionomer resin, and ethylene-. Examples include vinyl resins such as acrylic acid copolymers, ethylene-ethyl acrylate copolymers, ethylene-methacrylic acid copolymers, ethylene-ethyl methacrylate copolymers, polystyrene resins, vinyl chloride-vinyl acetate copolymers, and the like. Be done.

付着防止層に含まれる撥水性微粒子としては、疎水化表面処理を施した酸化物微粒子、例えば、SiO、TiO、AlおよびMgO等を使用することができる。また、CaCO、タルク、マイカ等を撥水性微粒子として使用することもできる。
これらの中でも、コストの面からSiOが好ましい。
付着防止層は、2種以上の撥水性微粒子を含んでいてもよい。
疎水化表面処理の方法としては、例えば、乾式法(CVD法、プラズマ法)を用いても、湿式法を用いてもよい。
As the water-repellent fine particles contained in the adhesion prevention layer, oxide fine particles subjected to a hydrophobic surface treatment, for example, SiO 2 , TiO 2 , Al 2 O 3, and MgO can be used. Further, CaCO 3 , talc, mica and the like can also be used as water-repellent fine particles.
Among these, SiO 2 is preferable from the viewpoint of cost.
The adhesion prevention layer may contain two or more kinds of water-repellent fine particles.
As the method of the hydrophobic surface treatment, for example, a dry method (CVD method, plasma method) or a wet method may be used.

撥水性微粒子の平均粒子径は、1nm以上、300nm以下であることが好ましく、1nm以上、200nm以下であることがより好ましく、1nm以上、100nm以下であることがさらに好ましい。撥水性微粒子の平均粒子径を上記数値範囲とすることにより、付着防止層の付着防止性および撥水性をより向上させることができる。
撥水性微粒子の平均粒子径は、走査電子顕微鏡により測定することができる。
The average particle size of the water-repellent fine particles is preferably 1 nm or more and 300 nm or less, more preferably 1 nm or more and 200 nm or less, and further preferably 1 nm or more and 100 nm or less. By setting the average particle size of the water-repellent fine particles within the above numerical range, the adhesion-preventing property and water repellency of the adhesion-preventing layer can be further improved.
The average particle size of the water-repellent fine particles can be measured by a scanning electron microscope.

付着防止層における撥水性微粒子の含有量は、5質量%以上、85質量%以下であることが好ましく、20質量%以上、70質量%以下であることがより好ましい。撥水性微粒子の含有量を上記数値範囲とすることにより、付着防止層の付着防止性および撥水性をより向上させることができる。 The content of the water-repellent fine particles in the adhesion prevention layer is preferably 5% by mass or more and 85% by mass or less, and more preferably 20% by mass or more and 70% by mass or less. By setting the content of the water-repellent fine particles in the above numerical range, the adhesion-preventing property and the water-repellent property of the adhesion-preventing layer can be further improved.

付着防止層に含まれるビーズ粒子としては、有機樹脂ビーズまたは無機ビーズ等が挙げられる。有機樹脂ビーズとしては、アクリル樹脂ビーズ、ポリエチレン樹脂ビーズ、ポリスチレン樹脂ビーズ、スチレン−アクリル共重合体ビーズ、ポリカーボネート樹脂ビーズ、ポリ塩化ビニルビーズ、メラミン樹脂ビーズ、ベンゾグアナミン−ホルムアルデヒド縮合体ビーズ、メラミン−ホルムアルデヒド縮合体ビーズ、ベンゾグアナミン−メラミン−ホルムアルデヒド縮合体ビーズおよびベンゾグアナミン−メラミン縮合体ビーズ等が挙げられる。また、無機ビーズとしては、ガラスビーズ、シリカビーズ、アルミナシリケート、タルク、マイカ等が挙げられる。その中でも安定性、コスト等の点から、シリカビーズであることがより好ましい。なお、上記有機樹脂ビーズおよび/または無機ビーズを2種以上用いてもよい。 Examples of the bead particles contained in the adhesion prevention layer include organic resin beads and inorganic beads. Organic resin beads include acrylic resin beads, polyethylene resin beads, polystyrene resin beads, styrene-acrylic copolymer beads, polycarbonate resin beads, polyvinyl chloride beads, melamine resin beads, benzoguanamine-formaldehyde condensate beads, and melamine-formaldehyde condensation. Examples thereof include body beads, benzoguanamine-melamine-formaldehyde condensate beads and benzoguanamine-melamine condensate beads. Examples of the inorganic beads include glass beads, silica beads, alumina silicate, talc, mica and the like. Among them, silica beads are more preferable from the viewpoint of stability, cost and the like. In addition, 2 or more kinds of the said organic resin beads and / or inorganic beads may be used.

ビーズ粒子の平均粒子径は、1μm以上、50μm以下であることが好ましく、3μm以上、30μm以下であることがより好ましく、5μm以上、20μm以下であることがさらに好ましい。ビーズ粒子の平均粒子径を上記数値範囲とすることにより、付着防止層の付着防止性および撥水性をより向上させることができる。さらに、付着防止層の耐擦過性を向上させることもでき、撥水性微粒子の摩擦による滑落を防止することができる。 The average particle size of the bead particles is preferably 1 μm or more and 50 μm or less, more preferably 3 μm or more and 30 μm or less, and further preferably 5 μm or more and 20 μm or less. By setting the average particle size of the bead particles within the above numerical range, the adhesion-preventing property and water repellency of the adhesion-preventing layer can be further improved. Further, it is possible to improve the scratch resistance of the adhesion prevention layer, and it is possible to prevent the water-repellent fine particles from slipping off due to friction.

付着防止層におけるビーズ粒子の含有量は、5質量%以上、85質量%以下であることが好ましく、20質量%以上、70質量%以下であることがより好ましい。ビーズ粒子の含有量を上記数値範囲とすることにより、付着防止層の付着防止性および撥水性をより向上させることができる。さらに、付着防止層の耐擦過性を向上させることもできる。 The content of the bead particles in the adhesion prevention layer is preferably 5% by mass or more and 85% by mass or less, and more preferably 20% by mass or more and 70% by mass or less. By setting the content of the bead particles within the above numerical range, the adhesion prevention property and the water repellency of the adhesion prevention layer can be further improved. Further, it is possible to improve the scratch resistance of the adhesion prevention layer.

付着防止層における熱可塑性樹脂の含有量と、撥水性微粒子およびビーズ粒子の含有量との比が、質量基準で、2:1〜1:5であることが好ましく、1.5:1〜1:3であることがより好ましい。これにより、付着防止層の付着防止性および撥水性をより向上させることができる。 The ratio of the content of the thermoplastic resin in the adhesion prevention layer to the content of the water-repellent fine particles and the bead particles is preferably 2: 1 to 1: 5 on a mass basis, preferably 1.5: 1 to 1. : 3 is more preferable. Thereby, the adhesion prevention property and the water repellency of the adhesion prevention layer can be further improved.

(蓋材用撥水性積層体の製造方法)
本発明の蓋材用撥水性積層体の製造方法は、基材を準備する工程と、基材上に、水系熱可塑性樹脂および水を含む熱接着層用塗工液を塗布、乾燥し、熱接着層を形成させる工程と、熱接着層上に、熱可塑性樹脂、撥水性微粒子、撥水性微粒子よりも平均粒子径の大きいビーズ粒子および有機溶剤を含む付着防止層用塗工液を塗布、乾燥し、付着防止層を形成させる工程と、を含むことを特徴とする。
(Manufacturing method of water-repellent laminate for lid material)
The method for producing a water-repellent laminate for a lid material of the present invention is a step of preparing a base material, and a coating liquid for a thermal adhesive layer containing a water-based thermoplastic resin and water is applied onto the base material, dried, and heated. A step of forming an adhesive layer, and a coating liquid for an adhesion prevention layer containing a thermoplastic resin, water-repellent fine particles, bead particles having an average particle diameter larger than that of the water-repellent fine particles, and an organic solvent are applied and dried on the thermal adhesive layer. It is characterized by including a step of forming an adhesion prevention layer.

(基材を準備する工程)
基材は、Tダイ法やインフレーション法等の従来公知の方法により作製してもよく、市販されるものを使用してもよい。
また、基材の熱接着層を形成させる面に対し、コロナ放電処理、薬品処理、オゾン処理等の表面処理を施すことが好ましい。これにより、基材と熱接着層との密着性を向上させることができる。
(Step to prepare the base material)
The base material may be produced by a conventionally known method such as a T-die method or an inflation method, or a commercially available material may be used.
Further, it is preferable to perform surface treatment such as corona discharge treatment, chemical treatment, ozone treatment, etc. on the surface of the base material on which the heat-adhesive layer is formed. This makes it possible to improve the adhesion between the base material and the heat-bonding layer.

(熱接着層を形成させる工程)
熱接着層は、基材上に、水系熱可塑性樹脂および水を含む熱接着層用塗工液をバーコート法等、公知の方法により塗布、乾燥することにより形成させることができる。
熱接着層用塗工液の乾燥後塗布量は、1g/m以上、20g/m以下であることが好ましく、1g/m以上、10g/m以下であることがより好ましい。
熱接着層用塗工液は、消泡等を目的として、イソプロピルアルコール等の有機溶剤を含んでいてもよい。
(Step of forming a thermal adhesive layer)
The heat-adhesive layer can be formed by applying and drying a coating liquid for a heat-adhesive layer containing a water-based thermoplastic resin and water on a base material by a known method such as a bar coating method.
Drying after coating of heat-bonding layer coating solution, 1 g / m 2 or more, preferably 20 g / m 2 or less, 1 g / m 2 or more, more preferably 10 g / m 2 or less.
The coating liquid for the heat-adhesive layer may contain an organic solvent such as isopropyl alcohol for the purpose of defoaming or the like.

(付着防止層を形成させる工程)
付着防止層は、熱接着層上に、熱可塑性樹脂、撥水性微粒子、前記撥水性微粒子よりも平均粒子径の大きいビーズ粒子および有機溶剤を含む付着防止層用塗工液をバーコート法等、公知の方法により塗布、乾燥することにより形成させることができる。
有機溶剤としては、酢酸メチル、酢酸エチル、酢酸プロピル、アセトン、メチルエチルケトン、メタノール、エタノール、エチレングリコール、ジエチレングリコール、トリエチレングリコール、テトラヒドロフラン、ジフラン、等が挙げられ、これらを1または2以上含むことができる。
付着防止層用塗工液の乾燥後塗布量は、0.5g/m以上、10g/m以下であることが好ましく、1.0g/m以上、7g/m以下であることがより好ましい。付着防止層の乾燥後塗布量が上記数値範囲内であれば、積層体のヒートシール性を維持しつつ付着防止性および撥水性をより向上させることができる。
(Step of forming an adhesion prevention layer)
As the adhesion prevention layer, a coating liquid for the adhesion prevention layer containing a thermoplastic resin, water-repellent fine particles, bead particles having an average particle size larger than that of the water-repellent fine particles, and an organic solvent is applied onto the heat-adhesive layer by a bar coating method or the like. It can be formed by applying and drying by a known method.
Examples of the organic solvent include methyl acetate, ethyl acetate, propyl acetate, acetone, methyl ethyl ketone, methanol, ethanol, ethylene glycol, diethylene glycol, triethylene glycol, tetrahydrofuran, difuran, and the like, and one or two or more of these can be contained. ..
The amount of the coating liquid for the adhesion prevention layer after drying is preferably 0.5 g / m 2 or more and 10 g / m 2 or less, and 1.0 g / m 2 or more and 7 g / m 2 or less. More preferred. When the amount of the adhesion-preventing layer applied after drying is within the above numerical range, the adhesion-preventing property and water repellency can be further improved while maintaining the heat-sealing property of the laminated body.

(蓋材)
本発明による蓋材は、上記積層体を用いて作製することができ、液体や半固体、ゲル状物質等の粘性を有する内容物、例えば、ヨーグルトの包装容器の蓋材として好適に使用することができる。
(Cover material)
The lid material according to the present invention can be produced by using the above-mentioned laminate, and is suitably used as a lid material for a packaging container of a viscous content such as a liquid, a semi-solid, or a gel-like substance, for example, a yogurt packaging container. Can be done.

(容器)
本発明による容器20は、図4に示すように蓋材用撥水性積層体からなる蓋材21と、容器本体22と、を備えてなり、蓋材の熱接着層12と、容器本体22とがヒートシールされてなる。より具体的には、容器本体22の開口部23と、蓋材の熱接着層12とがヒートシールされてなる。
ヒートシールの方法は特に限定されるものではなく、バーシール、高周波シールや超音波シール等従来公知の方法を使用することにより行うことができる。
(container)
As shown in FIG. 4, the container 20 according to the present invention includes a lid material 21 made of a water-repellent laminate for a lid material and a container main body 22, and includes a heat-bonding layer 12 of the lid material and the container main body 22. Is heat-sealed. More specifically, the opening 23 of the container body 22 and the heat-bonding layer 12 of the lid material are heat-sealed.
The heat sealing method is not particularly limited, and can be performed by using conventionally known methods such as bar sealing, high frequency sealing, and ultrasonic sealing.

容器本体は、ポリスチレン製、ポリプロピレン製、ポリエチレン製、紙製等のものを使用することができる。これらの中でも、成型性が良いという理由から、ポリスチレン製のものであることがより好ましい。 The container body may be made of polystyrene, polypropylene, polyethylene, paper or the like. Among these, polystyrene is more preferable because of its good moldability.

容器本体の形状は、特に限定されるものではなく、図4に示すカップ型や有底円筒形状等とすることができる。 The shape of the container body is not particularly limited, and may be a cup shape, a bottomed cylindrical shape, or the like shown in FIG.

また、容器内に充填することができる内容物は、特に限定されるものではないが、プリン、ヨーグルト、ゼリー等の食品や、シャンプーやボディソープ等の非食品を挙げることができる。 The contents that can be filled in the container are not particularly limited, and examples thereof include foods such as pudding, yogurt, and jelly, and non-foods such as shampoo and body soap.

本発明について実施例を挙げてさらに具体的に説明するが、本発明がこれら実施例によって限定されるものではない。 The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

(実施例1)
基材の作製
印刷用紙(大王製紙社製、商品名:リュウオウコート、55g/m)の一方の面に印刷インキ(DIC社製、商品名:サイアスHR)を用いて、グラビア印刷により柄を施した。印刷用紙の非印刷面に、アルミニウム蒸着PETフィルムをドライラミネートした後、エージングを行い、基材を作製した。なお、ドライラミネートには、ポリエーテル系接着剤(ロックペイント株式会社製、商品名:RU3900)を用いた。
(Example 1)
Fabrication of base material A pattern is printed by gravure printing on one side of printing paper (manufactured by Daio Paper Corporation, trade name: Ryuou Coat, 55 g / m 2 ) using printing ink (manufactured by DIC Corporation, trade name: Sias HR). provided. An aluminum-deposited PET film was dry-laminated on the non-printing surface of the printing paper, and then aged to prepare a base material. A polyether adhesive (manufactured by Rock Paint Co., Ltd., trade name: RU3900) was used for the dry laminate.

蓋材用撥水性積層体の作製
水系熱可塑性樹脂を含むインキ組成物A(水系熱可塑性樹脂として変性エチレン−酢酸ビニル共重合体50質量部、水50質量部含有、日栄化工株式会社製、商品名:HC−037)100質量部に、水25質量部を加えた熱接着層用塗工液を、基材のアルミニウム蒸着PETフィルム側に、バーコート法により、乾燥後の塗布量が3.5g/mとなるよう、塗布し、乾燥炉内で100℃で3秒間乾燥させ、熱接着層を形成させた。なお、塗工液の塗布にはミヤバー♯12(第一理化株式会社製)を用いた。
Preparation of water-repellent laminate for lid material Ink composition A containing water-based thermoplastic resin (50 parts by mass of modified ethylene-vinyl acetate copolymer as water-based thermoplastic resin, 50 parts by mass of water, manufactured by Niei Kako Co., Ltd., product Name: HC-037) Apply 25 parts by mass of water to 100 parts by mass of the coating liquid for the thermal adhesive layer on the aluminum-deposited PET film side of the base material by the bar coating method, and the amount of application after drying is 3. It was applied to 5 g / m 2 and dried in a drying furnace at 100 ° C. for 3 seconds to form a heat-adhesive layer. Miyabar # 12 (manufactured by Daiichi Rika Co., Ltd.) was used to apply the coating liquid.

熱接着層上に、酢酸プロピル、酢酸エチルおよびメチルエチルケトンを有機溶剤として含む櫻宮化学製のインキWRD−3(水系熱可塑性樹脂としてポリエステル樹脂、アクリル樹脂、撥水性微粒子として疎水性SiO(平均粒子径1〜100nm)、ビーズ粒子としてSiO(平均粒子径1〜30μm)含有、熱可塑性樹脂:撥水性微粒子+ビーズ粒子=1:1.4)を、乾燥後の塗布量が2g/mとなるよう、塗布し、乾燥炉内で100℃で3秒間乾燥させ、付着防止層を形成させ、蓋材用撥水性積層体を得た。なお、塗工液の塗布にはミヤバー♯12を用いた。 Ink WRD-3 manufactured by Sakuramiya Chemical Co., Ltd. containing propyl acetate, ethyl acetate and methyl ethyl ketone as organic solvents on the heat-bonding layer (polyester resin and acrylic resin as water-based thermoplastic resin, hydrophobic SiO 2 as water-repellent fine particles) (average particles) Diameter 1 to 100 nm), SiO 2 (average particle diameter 1 to 30 μm) contained as bead particles, thermoplastic resin: water-repellent fine particles + bead particles = 1: 1.4), and the amount applied after drying is 2 g / m 2. The particles were coated and dried at 100 ° C. for 3 seconds in a drying furnace to form an adhesion-preventing layer to obtain a water-repellent laminate for a lid material. In addition, Miyabar # 12 was used for applying the coating liquid.

(実施例2)
熱接着層用塗工液におけるインキ組成物Aを、インキ組成物B(水系熱可塑性樹脂としてオレフィン共重合体50質量部、水50質量部含有、日栄化工株式会社製、商品名:HC−080)に変更した以外は、実施例1と同様にして蓋材用撥水性積層体を得た。
(Example 2)
The ink composition A in the coating liquid for the thermal adhesive layer is mixed with the ink composition B (containing 50 parts by mass of an olefin copolymer and 50 parts by mass of water as a water-based thermoplastic resin, manufactured by Niei Kako Co., Ltd., trade name: HC-080). ) Was changed, and a water-repellent laminate for a lid material was obtained in the same manner as in Example 1.

(実施例3)
熱接着層用塗工液におけるインキ組成物Aを、インキ組成物C(水系熱可塑性樹脂としてエチレン−酢酸ビニル共重合体50質量部、水50質量部含有、ジャパンコーティングレジン株式会社製、商品名:アクアテックスEC−3700)に変更した以外は、実施例1と同様にして蓋材用撥水性積層体を得た。
(Example 3)
The ink composition A in the coating liquid for the thermal adhesive layer is mixed with the ink composition C (containing 50 parts by mass of ethylene-vinyl acetate copolymer and 50 parts by mass of water as a water-based thermoplastic resin, manufactured by Japan Coating Resin Co., Ltd., trade name). : Aquatex EC-3700) was used to obtain a water-repellent laminate for the lid material in the same manner as in Example 1.

(実施例4)
熱接着層用塗工液におけるインキ組成物Aを、インキ組成物D(水系熱可塑性樹脂としてエチレン−酢酸ビニル共重合体50質量部、水50質量部含有、ジャパンコーティングレジン株式会社製、商品名:アクアテックスEC−1800)に変更した以外は、実施例1と同様にして蓋材用撥水性積層体を得た。
(Example 4)
The ink composition A in the coating liquid for the thermal adhesive layer is mixed with the ink composition D (containing 50 parts by mass of ethylene-vinyl acetate copolymer and 50 parts by mass of water as a water-based thermoplastic resin, manufactured by Japan Coating Resin Co., Ltd., trade name. : Aquatex EC-1800) was used to obtain a water-repellent laminate for the lid material in the same manner as in Example 1.

(実施例5)
熱接着層用塗工液におけるインキ組成物Aを、インキ組成物E(水系熱可塑性樹脂としてエチレン−酢酸ビニル共重合体50質量部、水50質量部含有、ジャパンコーティングレジン株式会社製、商品名:アクアテックスEC−3500)に変更した以外は、実施例1と同様にして蓋材用撥水性積層体を得た。
(Example 5)
The ink composition A in the coating liquid for the thermal adhesive layer is mixed with the ink composition E (containing 50 parts by mass of ethylene-vinyl acetate copolymer and 50 parts by mass of water as a water-based thermoplastic resin, manufactured by Japan Coating Resin Co., Ltd., trade name). : A water-repellent laminate for a lid material was obtained in the same manner as in Example 1 except that it was changed to Aquatex EC-3500).

(比較例1)
非水系熱可塑性樹脂を含むインキ組成物F(非水系樹脂組成物としてn−酢酸プロピル含有、EVONIK社製、商品名:DEGALAN VP4311E)10質量部に、酢酸エチル8質量部を加えて熱接着層用塗工液とした以外は、実施例1と同様にして蓋材用撥水性積層体を得た。
(Comparative Example 1)
Ink composition F containing a non-aqueous thermoplastic resin (containing n-propyl acetate as a non-aqueous resin composition, manufactured by EVONIK, trade name: DEGALAN VP4311E), 8 parts by mass of ethyl acetate is added to 10 parts by mass of a heat-bonding layer. A water-repellent laminate for a lid material was obtained in the same manner as in Example 1 except that the coating liquid was used.

(比較例2)
付着防止層用塗工液に撥水性微粒子を含有させなかった以外は、実施例1と同様にして、蓋材用撥水性積層体を作製した。
(Comparative Example 2)
A water-repellent laminate for a lid material was produced in the same manner as in Example 1 except that the coating liquid for the adhesion-preventing layer did not contain the water-repellent fine particles.

(比較例3)
付着防止層用塗工液にビーズ粒子を含有させなかった以外は、実施例1と同様にして、蓋材用撥水性積層体を作製した。
(Comparative Example 3)
A water-repellent laminate for a lid material was produced in the same manner as in Example 1 except that the bead particles were not contained in the coating liquid for the adhesion prevention layer.

(比較例4)
付着防止層用塗工液に撥水性微粒子およびビーズ粒子を含有させなかった以外は、実施例1と同様にして、蓋材用撥水性積層体を作製した。
(Comparative Example 4)
A water-repellent laminate for a lid material was produced in the same manner as in Example 1 except that the coating liquid for the adhesion-preventing layer did not contain the water-repellent fine particles and the bead particles.

<蓋材用撥水性積層体の性能評価>
シール強度試験
実施例および比較例において得られた蓋材用撥水性積層体が備える熱接着層を、ポリスチレンシートへヒートシールした(ヒートシール温度:210℃、シール幅2mm、圧力0.3MPa、時間:0.8秒間)。ヒートシール後、蓋材用撥水性積層体を引っ張り試験機(オリエンテック社製)を用いて剥離させ、剥離時における最大強度をシール強度とした(N/15mm)(剥離角度180°、引張り速度300mm/min)。測定結果を表1に表す。
<Performance evaluation of water-repellent laminate for lid material>
The heat-adhesive layer provided in the water-repellent laminate for the lid material obtained in the seal strength test examples and comparative examples was heat-sealed on a polystyrene sheet (heat seal temperature: 210 ° C., seal width 2 mm, pressure 0.3 MPa, time). : 0.8 seconds). After heat sealing, the water-repellent laminate for the lid material was peeled off using a tensile tester (manufactured by Orientec), and the maximum strength at the time of peeling was taken as the sealing strength (N / 15 mm) (peeling angle 180 °, tensile speed). 300 mm / min). The measurement results are shown in Table 1.

撥水性試験
接触角計(協和界面化学製)を用いて、実施例および比較例において得られた蓋材用撥水性積層体が備える熱接着層と水滴との接触角を測定し、以下の評価基準に従い、評価した。測定結果を表1および2に表す。
○:接触角が、150°以上であった。
×:接触角が、150°未満であった。
Using a water repellency test contact angle meter (manufactured by Kyowa Surface Chemistry), the contact angle between the heat-adhesive layer and water droplets of the water-repellent laminate for lids obtained in Examples and Comparative Examples was measured and evaluated as follows. Evaluated according to the criteria. The measurement results are shown in Tables 1 and 2.
◯: The contact angle was 150 ° or more.
X: The contact angle was less than 150 °.

付着防止性試験
実施例および比較例において得られた蓋材用撥水性積層体を熱接着層が上方となるように45°傾け、熱接着層上に、ヨーグルト(1g)を垂らした。ヨーグルトの熱接着層への付着を目視にて観察し、以下の評価基準に従い、評価した。評価結果を表1および2に表す。
○:ヨーグルトの付着がなく、良好な付着防止性を発揮した。
△:ヨーグルトの付着が少しあったが、実用上問題なかった。
×:ヨーグルトの付着が多く、実用上問題があった。
The water-repellent laminate for a lid material obtained in the adhesion prevention test examples and comparative examples was tilted at 45 ° so that the heat-bonding layer was on the upper side, and yogurt (1 g) was dropped on the heat-bonding layer. The adhesion of yogurt to the heat-bonded layer was visually observed and evaluated according to the following evaluation criteria. The evaluation results are shown in Tables 1 and 2.
◯: No yogurt adhered, and good adhesion prevention property was exhibited.
Δ: There was some yogurt adhering, but there was no problem in practical use.
X: There was a lot of yogurt adhering, and there was a problem in practical use.

耐擦過性試験
実施例および比較例において得られた蓋材用撥水性積層体を熱接着層表面を手動型テープ圧着ロール(テスター産業株式会社製)を使用して、10回擦った(荷重2.5kg)。その後、熱接着層表面に水滴を垂らし、その滑落性を目視にて観察し、以下の評価基準に従い、評価した。評価結果を表1および2に表す。なお、比較例1〜4については、撥水性試験において良好な結果を示さなかったため、耐擦過性試験を行わなかった。
○:撥水性微粒子の滑落がなく、良好な撥水性を発揮した。
△:撥水性微粒子の滑落が若干あったが、実用上問題のない撥水性を発揮した。
×:撥水性微粒子の滑落が多く、実用上問題があった。
The water-repellent laminate for the lid material obtained in the scratch resistance test examples and comparative examples was rubbed 10 times on the surface of the heat-adhesive layer using a manual tape crimping roll (manufactured by Tester Sangyo Co., Ltd.) (load 2). .5 kg). Then, water droplets were dropped on the surface of the heat-bonded layer, and the sliding property was visually observed and evaluated according to the following evaluation criteria. The evaluation results are shown in Tables 1 and 2. As for Comparative Examples 1 to 4, since good results were not shown in the water repellency test, the scratch resistance test was not performed.
◯: The water-repellent fine particles did not slip off, and good water repellency was exhibited.
Δ: The water-repellent fine particles were slightly slipped off, but the water repellency was not a problem in practical use.
X: There was a problem in practical use because the water-repellent fine particles often slipped off.

Figure 0006970905
Figure 0006970905

10:蓋材用撥水性積層体
11:基材
12:熱接着層
13:撥水性微粒子
14:ビーズ粒子
15:付着防止層
20:容器
21:蓋材
22:容器本体
23:開口部
10: Water-repellent laminate for lid material 11: Base material 12: Thermal adhesive layer 13: Water-repellent fine particles 14: Bead particles 15: Adhesion prevention layer 20: Container 21: Cover material 22: Container body 23: Opening

Claims (8)

基材と、熱接着層と、付着防止層と、をこの順に備え、
前記熱接着層が、水系熱可塑性樹脂を含み、
前記水系熱可塑性樹脂が、ビニル系樹脂、オレフィン系樹脂、アクリル系樹脂およびポリエステル系樹脂から選択される水分散型の熱可塑性樹脂を含み、
前記付着防止層が、熱可塑性樹脂、撥水性微粒子、および前記撥水性微粒子よりも、走査電子顕微鏡により測定された平均粒子径の大きいビーズ粒子を含むことを特徴とする、蓋材用撥水性積層体。
A base material, a heat-adhesive layer, and an anti-adhesion layer are provided in this order.
The heat-adhesive layer contains a water-based thermoplastic resin and contains.
The water-based thermoplastic resin contains a water-dispersible thermoplastic resin selected from vinyl-based resin, olefin-based resin, acrylic-based resin and polyester-based resin.
The anti-adhesion layer contains a thermoplastic resin, water-repellent fine particles, and bead particles having a larger average particle size as measured by a scanning electron microscope than the water-repellent fine particles. body.
前記熱接着層における前記水系熱可塑性樹脂の含有量が、50質量%以上、99質量%以下である、請求項に記載の蓋材用撥水性積層体。 The water-repellent laminate for a lid according to claim 1 , wherein the content of the water-based thermoplastic resin in the heat-adhesive layer is 50% by mass or more and 99% by mass or less. 前記撥水性微粒子の平均粒子径が、1nm以上、300nm以下である、請求項1または2に記載の積層体。 The laminate according to claim 1 or 2 , wherein the average particle size of the water-repellent fine particles is 1 nm or more and 300 nm or less. 前記ビーズ粒子の平均粒子径が、1μm以上、50μm以下である、請求項1〜のいずれか一項に記載の積層体。 The laminate according to any one of claims 1 to 3 , wherein the average particle size of the bead particles is 1 μm or more and 50 μm or less. 前記付着防止層における前記熱可塑性樹脂の含有量と、前記撥水性微粒子および前記ビーズ粒子の含有量との比が、質量基準で、2:1〜1:5である、請求項1〜のいずれか一項に記載の積層体。 And the content of the thermoplastic resin in the anti-adhesion layer, the ratio between the content of the water-repellent particles and the beads are, by weight, 2: 1 to 1: 5, according to claim 1-4 The laminated body according to any one item. 請求項1〜のいずれか一項に記載の積層体からなる蓋材。 A lid material made of the laminate according to any one of claims 1 to 5. 請求項に記載の蓋材と、容器本体とを備え、
前記蓋材の熱接着層と、前記容器本体とが、ヒートシールされてなることを特徴とする、容器。
The lid material according to claim 6 and the container body are provided.
A container characterized in that the heat-adhesive layer of the lid material and the container body are heat-sealed.
基材を準備する工程と、
前記基材上に、水系熱可塑性樹脂および水を含む熱接着層用塗工液を塗布、乾燥し、熱接着層を形成させる工程と、
前記熱接着層上に、熱可塑性樹脂、撥水性微粒子、前記撥水性微粒子よりも、走査電子顕微鏡により測定された平均粒子径の大きいビーズ粒子、および有機溶剤を含み、水は含まない付着防止層用塗工液を塗布、乾燥し、付着防止層を形成させる工程と、
を含み、
前記水系熱可塑性樹脂が、ビニル系樹脂、オレフィン系樹脂、アクリル系樹脂およびポリエステル系樹脂から選択される水分散型の熱可塑性樹脂を含むことを特徴とする、蓋材用撥水性積層体の製造方法。
The process of preparing the base material and
A step of applying a coating liquid for a thermal adhesive layer containing a water-based thermoplastic resin and water on the substrate and drying the substrate to form a thermal adhesive layer.
An adhesion-preventing layer containing a thermoplastic resin, water-repellent fine particles, bead particles having a larger average particle diameter measured by a scanning electron microscope than the water-repellent fine particles, and an organic solvent on the heat-adhesive layer, and does not contain water. The process of applying and drying the coating liquid to form an adhesion prevention layer,
Including
The aqueous thermoplastic resin, vinyl resin, olefin resin, and wherein the free Mukoto thermoplastic resin water dispersion type selected from acrylic resins and polyester resins, of the lid for the water-repellent laminate Production method.
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