JP3869244B2 - Laminated paper for envelope with biodegradable window and envelope with biodegradable window - Google Patents
Laminated paper for envelope with biodegradable window and envelope with biodegradable window Download PDFInfo
- Publication number
- JP3869244B2 JP3869244B2 JP2001320500A JP2001320500A JP3869244B2 JP 3869244 B2 JP3869244 B2 JP 3869244B2 JP 2001320500 A JP2001320500 A JP 2001320500A JP 2001320500 A JP2001320500 A JP 2001320500A JP 3869244 B2 JP3869244 B2 JP 3869244B2
- Authority
- JP
- Japan
- Prior art keywords
- biodegradable
- envelope
- window
- poly
- weight
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、透明な窓を備えた生分解性窓付き封筒に関する。特に透明性に加えて耐衝撃強度にも優れた窓を備えた生分解性窓付き封筒に関する。また本発明は、生産性に優れた製造法を用いて製造することのできる上記封筒に関する。
【０００２】
【従来の技術】
最近、透明な窓を備えた紙製の郵便封筒が広く利用されるようになった。これは封筒の宛名書き部分を切り抜いてそこに透明フィルムが貼着されたものが一般的である。透明フィルムとしては、透明性と強度の面から、また比較的低価格であるという面から、ポリスチレンフィルム、ポリプロピレンフィルム、ポリエステルフィルム等のプラスチックフィルムが多く用いられている。
紙製の封筒は本来生分解性であるため廃棄物として特に問題がなかったにもかかわらず、上記のような非生分解性の合成樹脂フィルムを貼り合わせているため、廃棄に先だって手間のかかる回収分離しないと廃棄物問題を生じることになる。焼却処分に付す場合には、これらの合成樹脂は発熱量が大きいため高温となって焼却炉の損傷を早めるとともに地球温暖化をもたらす炭酸ガスを生成することになる。
【０００３】
この問題を解決する技術として、特開平７-２６７２５３号公報には、紙製封筒の窓の部分に生分解性透明フィルムを貼着する生分解性の透明窓付き封筒が開示されている。
しかしこの技術には、透明フィルムを窓サイズに合わせてカットする工程が必要であること、透明フィルムを紙製封筒に貼着するための接着剤および封筒形状に組み上げる際の接着剤には生分解性が考慮されていないこと、および透明フィルムを貼り付ける工程を含むため生産性が低いことの少なくとも３つの問題があった。
【０００４】
【発明が解決しようとする課題】
本発明は、封筒のどの部分にも生分解性でない材料を使用せず完全に生分解性であり、且つ透明フィルム部分の耐衝撃強度が実用的に十分高く、更に生産性に優れた透明窓付き封筒を提供することである。
【０００５】
【課題を解決するための手段】
本発明は、窓用切り抜き部を設けた連続紙に生分解性樹脂フィルムをラミネート加工した生分解性窓付き封筒用ラミネート紙に関する。
特に、本発明は、生分解性樹脂が、ポリ乳酸および／またはその共重合体６０〜９５重量％、ポリブテンサクシネート、ポリ(ブチレンサクシネート／アジペート)共重合体、ポリエチレンサクシネート、ポリ(ブチレンサクシネート／カーボネート)共重合体、ポリ(ブチレンサクシネート／テレフタレート)共重合体、ポリ(ブチレンアジペート／テレフタレート)共重合体およびこれらの共重合体からなる更なる共重合体または変性物の中から選ばれる単独または２種以上の混合物０〜４０重量％、ならびに生分解性可塑剤０〜１０重量％からなる樹脂である上記生分解性窓付き封筒用ラミネート紙に関する。
また、本発明は、上記の窓付き封筒用ラミネート紙を、生分解性樹脂フィルム面を内側として封筒形状に折り曲げ、側面部および底部を生分解性材料および／または天然物質により接着して仕上げた生分解性窓付き封筒に関する。
更にまた、本発明は、上記の窓付き封筒用ラミネート紙を、生分解性樹脂フィルム面を内側として封筒形状に折り曲げ、上記生分解性樹脂の熱シール性を利用して側面部および底部を熱シールにより仕上げた生分解性窓付き封筒に関する。
【０００６】
【発明の実施の形態】
本発明の特徴のひとつは、封筒の窓用の透明フィルムとして生分解性樹脂フィルムを使用するところにある。本発明でいう生分解性樹脂とは、屋外に廃棄された状態で、自然界の微生物や分解酵素によって一定期間内に水と二酸化炭素に分解され自然に還えるものを言い、具体的にはＪＩＳ Ｋ６９５０、ＪＩＳ Ｋ６９５１、ＪＩＳ Ｋ６９５３または化審法生分解性試験（ＭＩＴＩ−法）のいずれかの試験において、６ヶ月後の分解度が６０％以上のものを言う。
【０００７】
生分解性樹脂としては、ポリヒドロキシブチレート、ポリヒドロキシブチレートバレレート（以上、微生物産生系）、ポリ乳酸、ポリカプロラクトン、ポリブチレンサクシネート、ポリ(ブチレンサクシネート／アジペート)、ポリ(ブチレンサクシネート／カーボネート)、ポリエチレンサクシネート、ポリ(ブチレンサクシネート／テレフタレート)、ポリビニルアルコール、ポリ(ブチレンアジペート／テレフタレート)（以上、化学合成系）、修飾澱粉、酢酸セルロース、澱粉／化学合成系ポリマーのブレンド、キトサン／セルロース／澱粉（以上、天然物利用系）が例示できるが、本発明で使用する生分解性樹脂フィルムとしては、これらを単独、または複数混合して使用することができる。
【０００８】
本発明の生分解性樹脂フィルムとして特に好ましいものとしては、ポリ乳酸および／またはその共重合体６０〜９５重量％、ポリブテンサクシネート、ポリ(ブチレンサクシネート／アジペート)共重合体、ポリエチレンサクシネート、ポリ(ブチレンサクシネート／カーボネート)共重合体、ポリ(ブチレンサクシネート／テレフタレート)共重合体、ポリ(ブチレンアジペート／テレフタレート)共重合体およびこれらの共重合体からなる更なる共重合体または変性物の中から選ばれる単独または２種以上の混合物０〜４０重量％、ならびに生分解性可塑剤０〜１０重量％からなる樹脂が挙げられる。
【０００９】
上記において、ポリ乳酸とはＬ-、Ｄ-またはＬＤ-乳酸単位を主成分とする重合体であって、少量共重合成分として他のヒドロキシカルボン酸単位を含んでもよく、少量の鎖延長剤残基を含んでもよい。
また、ポリ乳酸共重合体においては、乳酸と共重合体するモノマーとして、乳酸の光学異性体（Ｌ-乳酸に対してはＤ-乳酸、Ｄ-乳酸に対してはＬ-乳酸）、グリコール酸、３-ヒドロキシ酪酸、４-ヒドロキシ酪酸、２-ヒドロキシ-ｎ-酪酸、２-ヒドロキシ-３,３-ジメチル酪酸、２-ヒドロキシ-３-メチル酪酸、２-メチル乳酸、２-ヒドロキシカプロン酸等の２官能脂肪族ヒドロキシカルボン酸やカプロラクトン、ブチルラクトン、バレロラクトン等のラクトン類が挙げられる。
【００１０】
生分解性可塑剤としては、グリセリン脂肪酸エステル、蔗糖脂肪酸エステル、ソルビタン脂肪酸エステル、エーテルエステル系可塑剤、その他添加量無制限の食品添加物等が使用できる。これらは単独でも複数併用しても使用できる。
【００１１】
本発明の生分解性樹脂フィルムでは、ポリ乳酸および／またはその共重合体６０〜９５重量％の範囲で配合されていることが好ましい。９５重量％を越えるとフィルムとしての衝撃強度が弱く、本発明の用途には好ましくない。
ポリブチレンサクシネート等の第２のポリマー成分は０〜４０重量％が好ましく、４０重量％を越えると、フィルムの透明性および剛性が著しく低下し、本発明の用途には好ましくない。
生分解性可塑剤は０〜１０重量％の範囲で配合され、これが１０重量％を越えるとブリードアウトが生じて好ましくなく、またフィルムの剛性が著しく低下する。
【００１２】
本発明のラミネートフィルムとして使用する生分解性樹脂には、上記成分に加えて、強度等の諸性能を向上または調整するために、各種の添加剤を配合することができる。この添加剤は、生分解性材料または天然物の場合は添加量に制限はないが、非生分解性材料である場合は、一つの成分として１重量％未満、添加剤合計で５％未満となるように添加される。添加剤としては、滑剤、酸化防止剤、紫外線吸収剤等が含まれる。
【００１３】
本発明で使用する生分解性樹脂フィルムは、厚さが１０〜５０μｍの範囲が好ましく、より好ましくは１５〜３０μｍである。１０μｍより薄いと、製膜性が悪く、また封筒窓としての強度が不十分となる。５０μｍより厚いと無用にコストがかさむことになる。
【００１４】
生分解性樹脂フィルムは、独立して成形しておいたものを別工程で封筒用の用紙にラミネートしても勿論構わないが、特に好ましいのは、生分解性樹脂をフィルムとして押出成形しながら、押出と同時に封筒用紙にラミネートする押出ラミネート法によってラミネートする方法である。
ラミネートするに当たっては、接着性向上のために、生分解性を損なわない範囲で、紙の表面を物理的に荒らしたり、紙へのコロナ放電処理、アンカー処理、プライマー処理を施してもよい。また、ラミネート時に紙またはラミネート樹脂にオゾン処理をほどこしてもよい。
【００１５】
封筒用の用紙に生分解性樹脂フィルムをラミネートした本発明の封筒用ラミネート紙から本発明の生分解性窓付き封筒を作成するには、封筒用ラミネート紙を封筒展開形状に切り出し、樹脂面を内側にして折り曲げた後、側面と底面の貼り合せ部を貼り合せればよい。
貼り合せ部を貼り合せるには、接着剤によって生分解性が不完全とならないように、生分解性材料および／または天然材料を用いて接着するのが望ましい。
【００１６】
本発明では、ラミネートした生分解性樹脂のホットメルト性を利用してヒートシールを行うことができる。この方法は生産性の面から特に好ましい。これを可能とするために、封筒用用紙にラミネートする生分解性樹脂としてヒートシール性を有する生分解性樹脂を使用することが好ましく、先に記載の生分解性樹脂はいずれもヒートシール性を有するものであり、ヒートシール法による封筒の製造が可能である。
接着剤として使用できる生分解性材料または天然材料としては、天然ゴム系接着剤、生分解性エラストマーまたは生分解性エラストマーを主成分とする生分解性接着剤、天然ゴム、アラビアゴム等の天然物または天然物を主成分とする天然物接着剤等が使用できる。
【００１７】
封筒用の紙としては、特に限定はなく従来封筒用として使用されてきた用紙がいずれも使用できる。例えば、クラフト紙、上質紙、グラシン紙、模造紙、印刷用紙等が例示できる。
【００１８】
【実施例】
以下、本発明をより詳細に且つ具体的に説明する。
実施例 １
封筒の宛名書きに相当する部分に窓をあけた目付け６４ｇ／ｍ２の上質紙ロールから紙を引出しながら、同時にＴダイから下記ラミネート樹脂を２１０℃で押し出して上記紙に２０μｍの厚さで押出ラミネートした。
ラミネート樹脂（重量比）：
ポリ乳酸７５／ポリ(ブチレンアジペート／テレフタレート)２５
得られた樹脂ラミネート紙を封筒展開形状に切り出し、樹脂面を内側に封筒状に折り曲げた後、封筒の側面と底面に当たる部分を１００℃で加熱して、上記樹脂をホットメルト接着剤として利用してヒートシールし、封筒を作成した。
【００１９】
実施例 ２
封筒の宛名書きに相当する部分に窓をあけた目付け６４ｇ／ｍ２のクラフト紙ロールから紙を引出しながら、同時にＴダイから下記ラミネート樹脂を２１０℃で押し出して上記紙に３０μｍの厚さで押出ラミネートした。
ラミネート樹脂（重量比）：
ポリ乳酸８５／ポリ(ブチレンサクシネート／アジペート)１０
／グリセリン脂肪酸エステル５
得られた樹脂ラミネート紙を封筒展開形状に切り出し、樹脂面を内側に封筒状に折り曲げた後、封筒の側面と底面に当たる部分を１００℃で加熱して、上記樹脂をホットメルト接着剤として利用してヒートシールし、封筒を作成した。
【００２０】
実施例 ３
実施例１で調製した樹脂ラミネート紙を封筒展開形状に切り出し、樹脂面を内側に封筒状に折り曲げた後、封筒の側面と底面に当たる部分を天然ゴム系接着剤で貼り合せて封筒形状を作成した。
実施例１〜３で得られた封筒は樹脂、紙、接着剤のいずれも生分解性材料であるため、封筒全体が生分解性であることは言うまでもないが、更に封筒に内容物を挿入する際、引っ掛かりが全くなく、外観も良好な封筒であった。また透明窓部の強度および接着部の強度も使用上まったく問題がなかった。
【００２１】
【発明の効果】
本発明の窓付き封筒は、窓に透明で生分解性の樹脂を使用し、また接着部にも生分解性または天然材料を使用しているため廃棄物問題を生じることなく、且つ実用に耐える強度も十分備えている。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an envelope with a biodegradable window provided with a transparent window. In particular, the present invention relates to an envelope with a biodegradable window provided with a window having excellent impact strength in addition to transparency. Moreover, this invention relates to the said envelope which can be manufactured using the manufacturing method excellent in productivity.
[0002]
[Prior art]
Recently, paper mail envelopes with transparent windows have become widely used. In general, the addressed portion of the envelope is cut out and a transparent film is attached thereto. As the transparent film, a plastic film such as a polystyrene film, a polypropylene film, or a polyester film is often used from the viewpoints of transparency and strength and relatively low cost.
Paper envelopes are inherently biodegradable, so there was no particular problem as waste, but the above-mentioned non-biodegradable synthetic resin film is attached, so it takes time before disposal. If it is not recovered and separated, waste problems will occur. When subjected to incineration, these synthetic resins generate a large amount of heat, so that they become high temperature and accelerate the damage of the incinerator and generate carbon dioxide that causes global warming.
[0003]
As a technique for solving this problem, Japanese Patent Application Laid-Open No. 7-267253 discloses a biodegradable envelope with a transparent window in which a biodegradable transparent film is attached to a window portion of a paper envelope.
However, this technology requires a process to cut the transparent film to fit the window size, and biodegradable adhesive for sticking the transparent film to the paper envelope and the adhesive when assembling into the envelope shape There are at least three problems that the productivity is not considered and the productivity is low because the process includes a step of attaching a transparent film.
[0004]
[Problems to be solved by the invention]
The present invention is a transparent window which is completely biodegradable without using any non-biodegradable material for any part of the envelope, and the impact resistance strength of the transparent film part is practically sufficiently high, and further excellent in productivity. It is to provide an envelope.
[0005]
[Means for Solving the Problems]
The present invention relates to a laminated paper for envelopes with a biodegradable window obtained by laminating a biodegradable resin film on a continuous paper provided with a window cutout.
In particular, the present invention provides a biodegradable resin comprising polylactic acid and / or a copolymer thereof of 60 to 95% by weight, a polybutene succinate, a poly (butylene succinate / adipate) copolymer, a polyethylene succinate, a poly (butylene). Among succinate / carbonate) copolymers, poly (butylene succinate / terephthalate) copolymers, poly (butylene adipate / terephthalate) copolymers and further copolymers or modifications of these copolymers. It is related with the said laminated paper for envelopes with a biodegradable window which is resin which consists of 0-40 weight% of single or 2 or more types of mixtures chosen, and 0-10 weight% of biodegradable plasticizers.
Further, the present invention is the above-mentioned laminated paper for envelopes with a window, which is finished by bending the biodegradable resin film surface into an envelope shape and bonding the side surface and bottom with a biodegradable material and / or a natural substance. The present invention relates to an envelope with a biodegradable window.
Furthermore, the present invention is to fold the above laminated paper for envelopes with a window into an envelope shape with the biodegradable resin film side as the inside, and heat the side and bottom portions by utilizing the heat sealability of the biodegradable resin. The present invention relates to an envelope with a biodegradable window finished with a seal.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
One of the features of the present invention is that a biodegradable resin film is used as a transparent film for an envelope window. The biodegradable resin as used in the present invention refers to a resin that is decomposed into water and carbon dioxide within a certain period by natural microorganisms and degrading enzymes and is naturally returned after being discarded outdoors. In any of the tests of K6950, JIS K6951, JIS K6953 or the Chemical Substances Control Act biodegradability test (MITI-method), the degradation degree after 6 months is 60% or more.
[0007]
Biodegradable resins include polyhydroxybutyrate, polyhydroxybutyrate valerate (above, microbial production system), polylactic acid, polycaprolactone, polybutylene succinate, poly (butylene succinate / adipate), poly (butylene succinate) Nate / carbonate), polyethylene succinate, poly (butylene succinate / terephthalate), polyvinyl alcohol, poly (butylene adipate / terephthalate) (above, chemical synthesis system), modified starch, cellulose acetate, starch / chemical synthesis polymer blend Examples of the biodegradable resin film used in the present invention can be used singly or in combination.
[0008]
Particularly preferred as the biodegradable resin film of the present invention include polylactic acid and / or a copolymer thereof of 60 to 95% by weight, a polybutene succinate, a poly (butylene succinate / adipate) copolymer, a polyethylene succinate, Poly (butylene succinate / carbonate) copolymer, poly (butylene succinate / terephthalate) copolymer, poly (butylene adipate / terephthalate) copolymer and further copolymers or modified products of these copolymers Or a resin comprising 0 to 40% by weight of a mixture of two or more selected from the above, and 0 to 10% by weight of a biodegradable plasticizer.
[0009]
In the above, polylactic acid is a polymer mainly composed of L-, D- or LD-lactic acid units, which may contain other hydroxycarboxylic acid units as a small amount copolymerization component, and a small amount of chain extender residue. Groups may be included.
In the polylactic acid copolymer, as a monomer copolymerized with lactic acid, an optical isomer of lactic acid (D-lactic acid for L-lactic acid, L-lactic acid for D-lactic acid), glycolic acid 3-hydroxybutyric acid, 4-hydroxybutyric acid, 2-hydroxy-n-butyric acid, 2-hydroxy-3,3-dimethylbutyric acid, 2-hydroxy-3-methylbutyric acid, 2-methyllactic acid, 2-hydroxycaproic acid, etc. And lactones such as caprolactone, butyl lactone and valerolactone.
[0010]
As biodegradable plasticizers, glycerin fatty acid esters, sucrose fatty acid esters, sorbitan fatty acid esters, ether ester plasticizers, and other food additives with unlimited additions can be used. These can be used alone or in combination.
[0011]
The biodegradable resin film of the present invention is preferably blended in the range of 60 to 95% by weight of polylactic acid and / or a copolymer thereof. If it exceeds 95% by weight, the impact strength as a film is weak, which is not preferred for the use of the present invention.
The second polymer component such as polybutylene succinate is preferably 0 to 40% by weight, and if it exceeds 40% by weight, the transparency and rigidity of the film are remarkably lowered, which is not preferable for the use of the present invention.
The biodegradable plasticizer is blended in the range of 0 to 10% by weight, and if it exceeds 10% by weight, bleeding out occurs, which is not preferable, and the rigidity of the film is remarkably lowered.
[0012]
In addition to the above components, various additives can be added to the biodegradable resin used as the laminate film of the present invention in order to improve or adjust various properties such as strength. In the case of a biodegradable material or a natural product, the amount of this additive is not limited, but in the case of a non-biodegradable material, it is less than 1% by weight as one component and less than 5% in total. To be added. Additives include lubricants, antioxidants, ultraviolet absorbers and the like.
[0013]
The biodegradable resin film used in the present invention preferably has a thickness in the range of 10 to 50 μm, more preferably 15 to 30 μm. When it is thinner than 10 μm, the film forming property is poor and the strength as an envelope window becomes insufficient. If it is thicker than 50 μm, the cost is unnecessarily increased.
[0014]
Of course, the biodegradable resin film may be independently molded and laminated on the envelope paper in a separate process, but it is particularly preferable that the biodegradable resin film is extruded as a film. It is a method of laminating by an extrusion laminating method in which it is laminated on envelope paper simultaneously with extrusion.
In laminating, the surface of the paper may be physically roughened or corona discharge treatment, anchor treatment, or primer treatment may be applied to the paper as long as biodegradability is not impaired in order to improve adhesion. Further, ozone treatment may be applied to paper or laminate resin at the time of lamination.
[0015]
In order to create the envelope with the biodegradable window of the present invention from the envelope laminated paper of the present invention in which the biodegradable resin film is laminated on the envelope paper, the envelope laminated paper is cut into an envelope developed shape, and the resin surface is cut. After bending inward, the bonded portions of the side surface and the bottom surface may be bonded together.
In order to bond the bonding portions, it is desirable to bond using a biodegradable material and / or a natural material so that the biodegradability is not incomplete by the adhesive.
[0016]
In the present invention, heat sealing can be performed by utilizing the hot melt property of the laminated biodegradable resin. This method is particularly preferable from the viewpoint of productivity. In order to make this possible, it is preferable to use a biodegradable resin having heat sealability as the biodegradable resin to be laminated on the envelope paper, and any of the biodegradable resins described above has heat sealability. It is possible to manufacture envelopes by the heat seal method.
Biodegradable materials or natural materials that can be used as adhesives include natural rubber adhesives, biodegradable elastomers, biodegradable adhesives based on biodegradable elastomers, natural products such as natural rubber and gum arabic. Alternatively, a natural product adhesive mainly composed of natural products can be used.
[0017]
The paper for the envelope is not particularly limited, and any paper that has been conventionally used for envelopes can be used. For example, craft paper, high quality paper, glassine paper, imitation paper, printing paper and the like can be exemplified.
[0018]
【Example】
Hereinafter, the present invention will be described in more detail and specifically.
Example 1
While pulling out paper from a high-quality paper roll with a weight of 64 g / m 2 with a window at the portion corresponding to the address of the envelope, the following laminate resin is extruded from the T die at 210 ° C. and extruded to a thickness of 20 μm onto the paper. Laminated.
Laminate resin (weight ratio):
Polylactic acid 75 / Poly (butylene adipate / terephthalate) 25
The obtained resin laminated paper is cut out into an envelope development shape, the resin surface is folded inward into an envelope shape, and then the portions corresponding to the side and bottom surfaces of the envelope are heated at 100 ° C., and the resin is used as a hot melt adhesive. And heat sealed to create an envelope.
[0019]
Example 2
While pulling out paper from a kraft paper roll with a basis weight of 64 g / m 2 with a window at the part corresponding to the address of the envelope, the following laminate resin is extruded from the T die at 210 ° C. and extruded to a thickness of 30 μm onto the paper. Laminated.
Laminate resin (weight ratio):
Polylactic acid 85 / poly (butylene succinate / adipate) 10
/ Glycerin fatty acid ester 5
Cut out the resulting resin-laminated paper into an envelope deployment shape, bend the resin surface in an envelope shape, and then heat the portions corresponding to the side and bottom of the envelope at 100 ° C. to use the resin as a hot melt adhesive. And heat sealed to create an envelope.
[0020]
Example 3
The resin-laminated paper prepared in Example 1 was cut out into an envelope development shape, the resin surface was folded inward into an envelope shape, and then the portion corresponding to the side surface and bottom surface of the envelope was bonded with a natural rubber adhesive to create an envelope shape. .
Since the envelopes obtained in Examples 1 to 3 are all biodegradable materials such as resin, paper, and adhesive, it goes without saying that the entire envelope is biodegradable, but the contents are further inserted into the envelope. At that time, the envelope was not caught at all and had a good appearance. Further, the strength of the transparent window portion and the strength of the bonded portion had no problem in use.
[0021]
【The invention's effect】
The envelope with a window of the present invention uses a transparent and biodegradable resin for the window, and also uses a biodegradable or natural material for the adhesive portion, so that it does not cause a waste problem and is practically used. It has sufficient strength.
Claims (2)
（１）ポリ乳酸および／またはその共重合体６０〜９５重量％、
（２）ポリブテンサクシネート、ポリ（ブチレンサクシネート／アジペート）共重合体、ポリエチレンサクシネート、ポリ（ブチレンサクシネート／カーボネート）共重合体、ポリ（ブチレンサクシネート／テレフタレート）共重合体、ポリ（ブチレンアジペート／テレフタレート）共重合体およびこれらの共重合体からなる更なる共重合体または変性物の中から選ばれる単独または２種以上の混合物０〜４０重量％、ならびに
（３）生分解性可塑剤０〜１０重量％
（ただし、生分解性樹脂として、上記（２）成分を必ず含み、（１）＋（２）＋（３）＝１００重量％である）
からなる生分解性窓付き封筒。A laminated paper for envelopes with a biodegradable window obtained by laminating a biodegradable resin film on continuous paper provided with a window cutout is folded into an envelope shape with the biodegradable resin film side inside, and the side and bottom portions are An envelope with a biodegradable window bonded and finished with a degradable material and / or a natural substance.
(1) 60-95% by weight of polylactic acid and / or copolymer thereof,
(2) Polybutene succinate, poly (butylene succinate / adipate) copolymer, polyethylene succinate, poly (butylene succinate / carbonate) copolymer, poly (butylene succinate / terephthalate) copolymer, poly (butylene) Adipate / terephthalate) copolymers and further copolymers or modifications made from these copolymers, 0 to 40% by weight, or a mixture of two or more thereof, and
(3) 0-10% by weight of biodegradable plasticizer
(However, as the biodegradable resin, the component (2) is always included, and (1) + (2) + (3) = 100% by weight)
An envelope with a biodegradable window .
（１）ポリ乳酸および／またはその共重合体６０〜９５重量％、
（２）ポリブテンサクシネート、ポリ（ブチレンサクシネート／アジペート）共重合体、ポリエチレンサクシネート、ポリ（ブチレンサクシネート／カーボネート）共重合体、ポリ（ブチレンサクシネート／テレフタレート）共重合体、ポリ（ブチレンアジペート／テレフタレート）共重合体およびこれらの共重合体からなる更なる共重合体または変性物の中から選ばれる単独または２種以上の混合物０〜４０重量％、ならびに
（３）生分解性可塑剤０〜１０重量％
（ただし、生分解性樹脂として、上記（２）成分を必ず含み、（１）＋（２）＋（３）＝１００重量％）
からなる生分解性窓付き封筒。A laminated paper for envelopes with a biodegradable window obtained by laminating a biodegradable resin film on a continuous paper provided with a window cutout is bent into an envelope shape with the biodegradable resin film surface inside, and the above-mentioned biodegradable resin It is an envelope with a biodegradable window in which the side and bottom are finished by heat sealing using heat sealing properties.
(1) 60-95% by weight of polylactic acid and / or copolymer thereof,
(2) Polybutene succinate, poly (butylene succinate / adipate) copolymer, polyethylene succinate, poly (butylene succinate / carbonate) copolymer, poly (butylene succinate / terephthalate) copolymer, poly (butylene) Adipate / terephthalate) copolymers and further copolymers or modifications made from these copolymers, 0 to 40% by weight, or a mixture of two or more thereof, and
(3) 0-10% by weight of biodegradable plasticizer
(However, as the biodegradable resin, the component (2) is always included, and (1) + (2) + (3) = 100% by weight)
An envelope with a biodegradable window .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001320500A JP3869244B2 (en) | 2001-10-18 | 2001-10-18 | Laminated paper for envelope with biodegradable window and envelope with biodegradable window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001320500A JP3869244B2 (en) | 2001-10-18 | 2001-10-18 | Laminated paper for envelope with biodegradable window and envelope with biodegradable window |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003128080A JP2003128080A (en) | 2003-05-08 |
| JP3869244B2 true JP3869244B2 (en) | 2007-01-17 |
Family
ID=19137883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001320500A Expired - Fee Related JP3869244B2 (en) | 2001-10-18 | 2001-10-18 | Laminated paper for envelope with biodegradable window and envelope with biodegradable window |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3869244B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI124660B (en) * | 2011-07-12 | 2014-11-28 | Stora Enso Oyj | Use of polybutylene succinate in extrusion coating of a packaging material |
| FI124772B (en) * | 2012-10-26 | 2015-01-30 | Stora Enso Oyj | Process for the production of biodegradable packaging material, biodegradable packaging material and packaging or containers made therefrom |
| FI124410B (en) * | 2012-10-26 | 2014-08-15 | Stora Enso Oyj | Process for the production of biodegradable packaging material, biodegradable packaging material and packaging or containers made therefrom |
-
2001
- 2001-10-18 JP JP2001320500A patent/JP3869244B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003128080A (en) | 2003-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5849401A (en) | Compostable multilayer structures, methods for manufacture, and articles prepared therefrom | |
| JP3242658B2 (en) | Biodegradable liquid-impermeable multilayer film composition | |
| US5849374A (en) | Compostable multilayer structures, methods for manufacture, and articles prepared therefrom | |
| EP1490435B1 (en) | Lactic acid-based resin composition | |
| EP1837363B1 (en) | Matte film or sheet | |
| JP2002173589A (en) | Aliphatic polyester composition, film made therefrom and laminate of the film | |
| JPH08323946A (en) | Multi-layer biodegradable plastic film | |
| JP2000238194A (en) | Biodegradable laminate film and agricultural biodegradable film | |
| JP3084239B2 (en) | Biodegradable laminated film | |
| JP3869244B2 (en) | Laminated paper for envelope with biodegradable window and envelope with biodegradable window | |
| JP2002060545A (en) | Biodegradable film or sheet, and molded article | |
| JP2005330332A (en) | Aliphatic polyester composition, film comprising the same, and laminated film | |
| JPH09241425A (en) | Biodegradable film or sheet and processed product of the same film or sheet | |
| JPH10146936A (en) | Biodegradable bag with fastener | |
| JP2006131705A (en) | Biodegradable adhesive and pressure-sensitive adhesive label using the same | |
| JP2000264343A (en) | Bag with biodegradable fastener | |
| JP2009096096A (en) | Laminated film | |
| JP7271964B2 (en) | Resin composition and laminate using the resin composition | |
| WO2022075233A1 (en) | Multilayer film and packaging material | |
| JPH0662944A (en) | Paper cup and manufacture thereof | |
| JP2000103025A (en) | Biodegradable laminated body | |
| JPH11279393A (en) | Biodegradable tape, packaging and packing tape, and self-adhesive tape | |
| JP2002059524A (en) | Degradable laminate | |
| JPH1024492A (en) | Biodegradable molded matter | |
| JP4499602B2 (en) | Biodegradable thermoforming sheet and container |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040317 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060208 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060322 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060518 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20061003 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20061012 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091020 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101020 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101020 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111020 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111020 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121020 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131020 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |