WO2010091536A1 - 聚乳酸纸板及利用其制成的食品容器 - Google Patents

聚乳酸纸板及利用其制成的食品容器 Download PDF

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Publication number
WO2010091536A1
WO2010091536A1 PCT/CN2009/000647 CN2009000647W WO2010091536A1 WO 2010091536 A1 WO2010091536 A1 WO 2010091536A1 CN 2009000647 W CN2009000647 W CN 2009000647W WO 2010091536 A1 WO2010091536 A1 WO 2010091536A1
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Prior art keywords
polylactic acid
paperboard
film layer
food container
weight
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PCT/CN2009/000647
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English (en)
French (fr)
Inventor
赖文正
黄志贤
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伟盟工业股份有限公司
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Publication of WO2010091536A1 publication Critical patent/WO2010091536A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Definitions

  • This invention relates to a paperboard, particularly to a completely biodegradable paperboard. Background technique
  • Paper-based food containers for food for sale such as cups, plates, bowls, etc. Based on cost and function considerations, the above-mentioned paper food containers are mostly made by coating a plastic film on a cardboard, and pressing or cutting and bonding. Since the paper product itself is not waterproof, the plastic film is coated on the paperboard to achieve water and oil resistance, so that the food container does not leak when the liquid is loaded.
  • the plastic film is made of polyethylene terephthalate (PET), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA) or low density polyethylene (Ethylene Vinyl Acetate, EVA) or low density polyethylene ( Low density Polyethylene, LDPE).
  • the plastic film coated on the above-mentioned paper food container cannot be decomposed after being discarded.
  • the food container can be treated by incineration, it is easy to generate exhaust gas during combustion, so that the food container is likely to become a major source of environmental pollution after use.
  • biodegradable materials such as polylactic acid, starch or polycaprolactone (PCL).
  • PCL polycaprolactone
  • the content of polylactic acid is more than 50%, and some food containers still contain non-biodegradable materials, thus affecting the decomposition speed of the food container.
  • non-biodegradable materials remain in the environment and cause pollution, and the problem of environmental pollution is not completely solved.
  • polylactic acid paperboard having a high purity biodegradable material, polylactic acid.
  • This polylactic acid board can be quickly decomposed in the environment after use, reducing environmental pollution.
  • the present invention provides a polylactic acid paperboard comprising at least a paperboard and at least one film layer coated on the paperboard.
  • the film layer has a polylactic acid material, and the polylactic acid material has a content of 97 to 100% by weight.
  • the above film layer is located on one side or both sides of the paperboard.
  • the above film layer has 3% by weight or less of starch, polycaprolactone or other biodegradable material.
  • Another object of the present invention is to provide a food container comprising at least the polylactic acid paperboard of the above embodiment.
  • It is still another object of the present invention to provide a polylactic acid paperboard comprising at least a paperboard and at least one film layer overlying the paperboard.
  • the film layer had 100% by weight of a polylactic acid material.
  • FIG. 1 is a schematic structural view of a polylactic acid paperboard according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a polylactic acid paperboard according to another embodiment of the present invention.
  • the polylactic acid paperboard 100 has a paperboard 110 and a film layer 120.
  • the film layer 120 is coated on the one side of the paperboard 110 by laminating, coating or laminating with 97 to 100% by weight of the polylactic acid material.
  • the polylactic acid content of the film layer 120 may be 98% by weight, 99% by weight, 99.5% by weight or 100% by weight.
  • modified materials may be added to the film layer 120 according to subsequent different product manufacturing requirements, for example, mixing 3% by weight or less of starch, polycaprolactone, polyol or other biodegradable property in the film layer 120. material.
  • Different product manufacturing requirements such as: Tray that needs to be folded, such as a box or cosmetic case, or a paper machine of a specific shape, such as a support paper holder or an egg support box for packaging, or a thin layer of polylactic acid coated Cardboard.
  • FIG. 2 is a view showing the structure of a polylactic acid paperboard according to another embodiment of the present invention.
  • the polylactic acid paperboard 200 in this embodiment is similar to the previous embodiment, and also has a paperboard 210 and a film layer 220. The difference is that the film layer 220 is covered by a single layer lamination method.
  • the cardboard 210 is double-sided, so that both sides of the cardboard 210 are waterproof.
  • the film layer 220 is coated on both sides of the paperboard 210 in a multi-layer coating manner.
  • the above polylactic acid paperboard can be applied to manufacture various food containers such as water cups, coffee cups, dinner plates or bowl containers.
  • Table 1 is the polylactic acid paperboard of the present invention.
  • the polylactic acid content is 100%
  • the polylactic acid paperboard is placed in a composting environment, that is, the temperature is 56 to 60 ° C, and the air is ventilated with saturated water without carbon dioxide, and the number of days is different.
  • the degree of decomposition is the degree of decomposition.
  • the polylactic acid paperboard of the present invention can be almost completely decomposed into water and carbon dioxide under appropriate temperature, humidity and non-closed space. Water and carbon dioxide can be returned to the environment for biological reuse and environmental pollution reduction. Moreover, after the food container made of polylactic acid paperboard is used, even if it is treated by incineration, the heat energy generated is lower than that of ordinary plastic materials, and the service life of the incinerator can be prolonged. Furthermore, since polylactic acid is more rigid than ordinary plastic materials, the thickness of the paperboard used can be thinner, that is, the basis weight of the paperboard is small, and the amount of paper used can be reduced.
  • the polylactic acid paperboard of the invention is used to replace the traditional plastic film with the polylactic acid film, which not only has good waterproof and oil-proof effect, but also has higher rigidity than the general plastic material, and the thickness of the used cardboard can be thinner, that is, the basis weight of the cardboard is higher. Small, can reduce the amount of paper used.
  • polylactic acid is completely biodegradable from the afternoon, so in a non-closed space of appropriate temperature and humidity, the polylactic acid paperboard can be decomposed into water and carbon dioxide. Water and carbon dioxide can be returned to the environment for biorecycling. Even with the incineration method, the heat energy generated is lower than that of ordinary plastic materials, which can extend the service life of the incinerator.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Cartons (AREA)

Description

聚乳酸纸板及利用其制成的食品容器 技术领域
本发明是有关于一种纸板， 直特别是有关于一种完全生物可分解的纸板。 背景技术
—般外卖食物用的纸制食品容器， 如杯、盘、碗等。基于成本与功能考虑， 上述纸制食品容器大多以纸板上被覆塑料膜， 经压模或裁切粘合而制成。 由于 纸制品本身无法防水， 因此在纸板上被覆塑料膜来达到防水、 防油的目的， 使 食品容器不会于装载液体时泄漏。 而塑料膜的材质如聚对苯二甲酸乙二酯 (Polyethylene terephthalate, PET), 聚乙烯醇 (Polyvinyl Alcohol, PVA). 乙烯- 醋酸乙烯共聚物 (Ethylene Vinyl Acetate, EVA)或低密度聚乙烯 (Low density Polyethylene, LDPE)。
然而随着环境保护的议题日渐受到重视上述纸制食品容器上被覆的塑料 膜于废弃后， 皆无法分解。虽然可以利用焚烧法处理上述食品容器， 但也容易 在燃烧时产生废气因此上述食品容器于使用后容易成为环境的一大污染源。
虽然已有许多生物可分解材料应用于食品容器上取代传统塑料材料，生物 可分解材料如聚乳酸、 淀粉或聚己内酯 (Polycaprolactone, PCL)。 而目前所指 的生物可分解食品容器或纸板中， 聚乳酸的含量为 50%以上， 且部份食品容 器中仍含有非生物可分解性材料， 因而影响食品容器的分解速度。 再者， 非生 物可分解性材料也仍留存于环境中造成污染， 并未完全解决环境污染的问题。 发明公开
综上所述， 本发明的一目的在于提供一种聚乳酸纸板， 具有高纯度的生物 可分解材料， 聚乳酸。 此聚乳酸纸板在使用后能快速于环境中分解， 减少环境 污染。
依据本发明的上述目的， 本发明提出一种聚乳酸纸板， 至少包含纸板与至 少一膜层被覆于纸板上。 膜层具有聚乳酸材料， 而上述聚乳酸材料含量为 97 〜100重量％。
其中上述膜层位于纸板的单侧或双侧。 其中上述膜层具有 3重量％以下的淀粉、聚己内酯或其它生物可分解性材 料。
本发明的另一目的在于提供一种食品容器至少包含上述实施例的聚乳酸 纸板。
本发明的又一目的在于提供一种聚乳酸纸板至少包含纸板与至少一膜层 以淋膜方式覆盖于纸板上。 膜层具有 100重量％的聚乳酸材料。 附图简要说明
为让本发明的上述和其它目的、特征、 优点与实施例能更明显易懂， 所附 附图的说明如下：
图 1是绘示依照本发明一实施方式的一种聚乳酸纸板的结构示意图； 图 2是绘示依照本发明另一实施方式的一种聚乳酸纸板的结构示意图。 【主要组件符号说明】
100、 200： 聚乳酸纸板 110、 210： 纸板
120、 220： 膜层 实现本发明的最佳方式
图 1是绘示依照本发明一实施方式的一种聚乳酸纸板的结构示意图。聚乳 酸纸板 100具有纸板 110与膜层 120。 膜层 120为以 97〜100重量％聚乳酸材 料利用淋膜、涂布或贴合的方式披覆于纸板 110单侧。 其中， 膜层 120的聚乳 酸含量建议可为 98重量％、 99重量％、 99.5重量％或100重量％。
此外， 膜层 120中也可依照后续不同产品制作要求而添加其它的改质材 料， 例如在膜层 120中混掺 3重量％以下的淀粉、 聚己内酯、 多元醇或其它生 物可分解性材料。 不同的产品制作要求例如： 需经折叠的纸盒， 像是包装盒或 化妆品盒， 或是特定形状的纸器， 如包装用支撑纸架或蛋支撑盒， 又或是聚乳 酸被覆厚度较薄的纸板。
此外， 膜层 120并非限定以单层被覆于纸板 110单侧， 也可为多层被覆于 纸板 110单侧。或者如图 2所示， 图 2是绘示依照本发明另一实施方式的一种 聚乳酸纸板的结构。此实施方式中的聚乳酸纸板 200与前述实施方式相似， 同 样具有纸板 210与膜层 220。 不同处在于膜层 220为利用单层淋膜方式被覆于 纸板 210双侧， 使得纸板 210两侧皆具有防水功能。亦或是， 膜层 220以多层 淋膜方式被覆于纸板 210双侧。
上述聚乳酸纸板可应用于制造各种食品容器， 如水杯、 咖啡杯、餐盘类或 碗类容器。
表一为本发明的聚乳酸纸板， 聚乳酸含量 100%时， 将聚乳酸纸板置于堆 肥环境中， 即温度 56~60°C， 以含饱和水份无二氧化碳的空气通气下， 不同天 数的分解程度。
表一
Figure imgf000004_0001
由表一结果可知本发明的聚乳酸纸板中， 聚乳酸含量为 100%时， 在 30 天内即可分解超过 50%， 而超过 80天后， 即可分解达 90%以上。
由上述本发明实施方式可知， 应用本发明的聚乳酸纸板， 在适当温度、湿 度与非密闭空间下， 聚乳酸纸板可几近完全被分解为水与二氧化碳。而水与二 氧化碳可回归于环境中， 供生物再利用， 减少环境污染。 且以聚乳酸纸板制成 的食品容器使用后， 即使利用焚化方式处理， 产生的热能亦较一般塑料材质 低， 可延长焚化炉的使用寿命。 再者， 由于聚乳酸较一般塑料材质刚性高， 因 此所使用的纸板厚度可较薄， 即纸板基重较小， 可减少纸材的使用量。
虽然本发明已以实施例揭露如上， 然其并非用以限定本发明， 任何熟悉此 技术的人员， 在不脱离本发明的精神和范围内， 当可作各种的更动与润饰， 因 此本发明的保护范围当以权利要求书所界定的范围为准。 工业应用性
应用本发明的聚乳酸纸板， 以聚乳酸膜取代传统塑料膜， 不仅仍具有良好 的防水、防油效 且因聚乳酸较一般塑料材质刚性高，使用纸板厚度可较薄， 即纸板基重较小， 可减少纸材的使用量。 另由午聚乳酸为完全生物可分解性， 因此在适当温度、 湿度的非密闭空间中， 聚乳酸纸板可被分解为水与二氧化 碳。而水与二氧化碳可回归于环境中，供生物再循环利用。即使利用焚化方式， 产生的热能亦较一般塑料材质低， 可延长焚化炉的使用寿命。

Claims

权利要求书
1、 一种聚乳酸纸板， 其特征在于， 至少包含：
一纸板； 以及
至少一膜层， *覆于该纸板上， 该膜层具有一聚乳酸材料， 该聚乳酸材料 含量为 97〜100重量％。
2、 根据权利要求 1所述的聚乳酸纸板， 其特征在于， 该膜层位于该纸板 的单侧或双侧。
3、 根据权利要求 1所述的聚乳酸纸板， 其特征在于， 该聚乳酸材料含量 为 98重量％、 99重量％或99.5重量％。
4、 根据权利要求 1所述的聚乳酸纸板， 其特征在于， 该膜层具有 3重量
%以下的淀粉、 聚己内酯、 多元醇或其它生物可分解性材料。
5、 根据权利要求 1所述的聚乳酸纸板， 其特征在于， 该膜层以淋膜、 涂 布或贴合方式被覆于该纸板上。
6、 一种食品容器， 其特征在于， 至少包含如权利要求 1所述的聚乳酸纸 板。
7、 一种聚乳酸纸板， 其特征在于， 至少包含：
一纸板； 以及 '
至少一膜层， 批覆于该纸板上， 该膜层具有一 100重量％的聚乳酸材料。
8、 根据权利要求 7所述的聚乳酸纸板， 其特征在于， 该膜层位于该纸板 的单侧或双侧。
9、 根据权利要求 7所述的聚乳酸纸板， 其特征在于， 该膜层以淋膜、 涂 布或贴合方式被覆于该纸板上。
PCT/CN2009/000647 2009-02-16 2009-06-11 聚乳酸纸板及利用其制成的食品容器 WO2010091536A1 (zh)

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CN106049185A (zh) * 2016-05-19 2016-10-26 苏州倍力特物流设备有限公司 一种聚乳酸复合纸板膜材料及其制备方法
CN112796167A (zh) * 2021-01-14 2021-05-14 深圳光华伟业股份有限公司 一种可生物降解的耐低温淋膜纸及其制备方法
CN112853817A (zh) * 2021-01-27 2021-05-28 青岛浩恩医药耗材有限公司 一种可降解塑料制备医药包装材料的方法

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CN110184854A (zh) * 2019-06-03 2019-08-30 武汉鑫亚泰科技有限公司 一种pla淋膜纸及其制备方法
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CN110685186A (zh) * 2019-09-10 2020-01-14 衢州五洲特种纸业股份有限公司 一种改性石墨烯/纳米纤维素导电功能涂料及其制备方法和应用
CN110670411A (zh) * 2019-09-10 2020-01-10 衢州五洲特种纸业股份有限公司 一种具有保温和加热功能的食品卡纸及其制备方法

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