13017971301797
發明説明（1 本發明係關於可熱密封包裝材料之製法，其中乂 之聚合物塗層係擠出於纖維基底上，該層括2於其上 :封層及至少一層水蒸氣渗透性低於熱密封層之== 層。而且，本發明關於以本發明提供之聚合物塗覆之勺 及由摺疊及熱密封製造之修飾密封包材。 、 匕材 液態甚至許多乾燥食品均需要緊密之產品包裝，以避 產品永久受損，而且保護包裝材料本身。材料之水 余度可避免液態產品自包材洩漏，且避免材料之纖維美底 因自產物吸收水氣而浸泡水。水蒸氣緊密度亦可避免^ 外來水氣而損及包裝之乾燥食品。另外，通常包裝材料需 要不透氧，以避免包裝產品氧化且保存其香味。 一般在纖維為主之聚合物塗覆之包裝材料之最主要熱 密封層中所用之低密度聚乙烯（LDPE)亦可保護免於水蒸氣 滲透。然而，LDPE並非該目的最有效之材料，且為達到良 好之水蒸氣阻隔，需要使用相對後之層。纖維為主之包材 中係使用南密度聚乙晞（HDPE)最為形成水蒸氣阻隔最有 效之聚合物，含HDPE之層一般係置於熱密封層及纖維基底 及可能之氧氣障層之間之包材内側，因此除纖維基底外， 水蒸氣阻隔亦保護氧氣障層免餘音包裝之產品造成之濕 潤。 然而，纖維為主之包材中使用HDPE之缺點為會因此造 成材料捲繞。原因是HDPE層擠出後會產生後結晶。 本發明之目的係形成一種溶液，可避免纖維為主之包材 之該捲繞問題，而不需對材料之水蒸氣阻隔妥協。本發明 -4 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 裝 訂 線 1301797 A7 B7 五、發明説明（2 ) 包材製法之特徵為在障層中加入環晞烴共聚物（COC)，使 得擠出產生聚合物中不會發生後結晶之無定型層。 環烯烴共聚物（COC)為藉由使乙婦及環烯烴共聚合產生 之聚合物，且係揭示在例如公開文獻EP 0773102 A1中，該 參考在此提出作為苯說明之一部份。COC之特徵為具有良 好水蒸氣保護性質；另外，為無定型。因此，不會有後結 晶或因擠出之COC層造成之捲繞。至於水蒸氣保護，其可 解決依據技藝所用HDPE有關之問題。 公開文獻EP 0773102 A1中之實例由其敘述四環環烯烴共 聚物。另外，藉由使乙烯及原冰片婦共聚合製備之市售COC 聚合物為購得，其具有至少與HDPE類似之高密度及蒸氣保 護性質。製造該COC之Ticona GmbH公司提出其產物之密度 為1.02克/m3，彈性模數為2600-3500 N/mm2，且滲水性為 0.02-0.04 g · mm/m2 · 24小時。COC曾經以聚合物氣泡包裝 及包裝膜用之水蒸氣氣密材料銷售，但就申請者所知，COC 並未用於以纖維為主之包裝材料如包裝紙及紙板，作為一 本發明擠出之水蒸氣保護，其目的係避免先前材料之捲繞 問題。 含COC之障層可以以擠出直接貼在LDPE之熱密封層 上，而不需在層間塗上結合劑。該COC並非可熱密封，但 可與LDPE熱密封結合。再者，依據本發明曾了解COC障層 可附接於纖維基底擠出，同樣的在層間並不需結合劑層。 因此，本發明可能包材之具體例成為可能，其中纖維基底 之一面僅疊加上COC，同時作為纖維基底之反面之熱密封 -5 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 1301797 A7 B7 五、發明説明（3 ) 層可全部去除而沒有聚合物塗層。使用HDPE當作水蒸氣障 層製造各材料並非全然不可能，因為捲繞之問題。該材料 係用作乾燥產品之包裝，其中聚合物層可作為包材之外表 面，保護纖維基底及包裝之產品免於外來之水氣。 另外，本發明可有利的藉由將疊加上之C 0 C及熱密封層 擠出於包材纖維基底之兩面塗佈。材料可能具有對稱之結 構，但其可用於摺疊之包裝而不會改變水蒸氣阻隔或包裝 之其他性質。 依據本發明，水蒸氣層可僅包含COC或者包含COC及某 些其他聚合物之混合物，如LDPE。COC本身為相對硬質之 聚合物材料，且藉由使其與LDPE摻合，當包裝材料摺疊成 包材時，可降低因破裂減低蒸氣阻隔之風險。 依據本發明，形成水蒸氣保護之COC層之重量可為5-50 g/m2,較好7-30 g/m2,且最好10-20 g/m2。熱封層（較好由LDPE 製成）之重量為5-50 g/m2，較好為5-30 g/m2，且最好為7-20 g/m2。藉由使其他適用之聚合物，如聚丙烯或聚丁晞與熱 密封層中之LDPE摻合，其可能達成剝離結合之密封，亦即 當拉開時會結合密封。 本發明包裝材料可再加入至少一層形成氧氣障層之聚 合物層。例如當包裝液態食品時，包裝材料一般會摺疊， 因此氧障層會在纖維基底之内部。COC水蒸氣障層令可有 利的加在材料之兩面，使得纖維基底及氧氣障層可夾在 COC層之間。接著使包材内面之聚合物成形成氧及水蒸氣 阻隔，其可保護包裝之產品免於於空氣接觸，同時使包材 -6 - 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)DESCRIPTION OF THE INVENTION (1) The present invention relates to a process for preparing a heat sealable packaging material, wherein a polymer coating of tantalum is extruded onto a fibrous substrate, the layer comprising 2: the sealing layer and at least one layer of water vapor permeability are lower than The heat seal layer == layer. Moreover, the present invention relates to a polymer coated spoon provided by the present invention and a modified sealed package manufactured by folding and heat sealing. The coffin liquid or even many dry foods require a tight product. Packaging to avoid permanent damage to the product, and to protect the packaging material itself. The water content of the material can avoid leakage of the liquid product from the packaging material, and avoid the fiber bottom of the material soaking water due to the absorption of moisture from the product. It can also avoid the external moisture and damage the packaged dry food. In addition, the packaging material usually needs to be opaque to avoid oxidation of the packaged product and preserve its fragrance. Generally, the most fiber-coated polymer coated packaging materials. The low density polyethylene (LDPE) used in the main heat seal layer also protects against water vapor permeation. However, LDPE is not the most effective material for this purpose and is in good condition. Water vapor barrier, the use of the opposite layer is required. The fiber-based packaging material uses the South Density Polyethylene (HDPE) to form the most effective polymer for water vapor barrier. The HDPE-containing layer is usually placed in the heat seal layer. And the inside of the packaging material between the fiber substrate and the possible oxygen barrier layer. Therefore, in addition to the fiber substrate, the water vapor barrier also protects the moisture barrier from the product of the oxygen barrier layer. However, HDPE is used in the fiber-based packaging material. The disadvantage is that the material is wound up. The reason is that the HDPE layer will produce post-crystallization after extrusion. The object of the present invention is to form a solution which can avoid the winding problem of the fiber-based packaging material without the need for materials. The water vapor barrier compromises. The present invention - 4 - The paper scale applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm) Gutter 1301797 A7 B7 V. Invention Description (2) The packaging material method is characterized by a barrier layer A cyclotere hydrocarbon copolymer (COC) is added to cause extrusion to produce an amorphous layer in which no post-crystallization occurs in the polymer. The cyclic olefin copolymer (COC) is a polymer produced by copolymerizing a woman and a cyclic olefin. And is disclosed in, for example, the publication EP 0 773 102 A1, which is hereby incorporated by reference as part of the benzene specification. COC is characterized by good water vapor protection properties; in addition, it is amorphous. Crystallization or winding by the extruded COC layer. As for steam protection, it can solve the problems associated with HDPE according to the art. The example in the publication EP 0773102 A1 describes the tetracyclic cyclic olefin copolymer. A commercially available COC polymer prepared by copolymerizing ethylene and borneol is commercially available having a high density and vapor barrier properties similar to those of HDPE. Ticona GmbH, which manufactures the COC, has a product density of 1.02 g/ M3, the modulus of elasticity is 2600-3500 N/mm2, and the water permeability is 0.02-0.04 g · mm/m2 · 24 hours. COC was once sold as a water vapor vapour material for polymer bubble wrap and packaging film, but as far as the applicant knows, COC is not used for fiber-based packaging materials such as wrapping paper and paperboard as an extrusion process. Water vapor protection, the purpose of which is to avoid the winding problem of previous materials. The COC-containing barrier layer can be applied directly to the LDPE heat seal layer by extrusion without the need to apply a bonding agent between the layers. The COC is not heat sealable but can be combined with LDPE heat sealing. Furthermore, it has been known in accordance with the present invention that the COC barrier layer can be attached to the fibrous substrate for extrusion, as is the case without the need for a binder layer between the layers. Therefore, the specific example of the possible packaging material of the present invention is possible, in which only one side of the fiber substrate is superposed with COC, and at the same time, it is heat-sealed as the opposite side of the fiber substrate-5 - the paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X 297) PCT) 1301797 A7 B7 V. INSTRUCTIONS (3) The layers can be completely removed without a polymer coating. It is not entirely impossible to manufacture materials using HDPE as a water vapor barrier because of the problem of winding. This material is used as a package for dry products where the polymer layer acts as a surface outside the packaging material, protecting the fibrous substrate and the packaged product from foreign moisture. Further, the present invention can be advantageously applied by extruding the superimposed C 0 C and the heat seal layer on both sides of the packaging fiber substrate. The material may have a symmetrical structure, but it can be used for folded packaging without altering the water vapor barrier or other properties of the package. In accordance with the present invention, the water vapor layer may comprise only COC or a mixture comprising COC and some other polymer, such as LDPE. The COC itself is a relatively rigid polymeric material and, by blending it with LDPE, reduces the risk of vapor barriers due to cracking when the packaging material is folded into a packaging material. According to the present invention, the weight of the COC layer forming the water vapor protection may be 5 to 50 g/m2, preferably 7 to 30 g/m2, and more preferably 10 to 20 g/m2. The heat seal layer (preferably made of LDPE) has a weight of 5 to 50 g/m2, preferably 5 to 30 g/m2, and more preferably 7 to 20 g/m2. By blending other suitable polymers, such as polypropylene or polybutylene, with the LDPE in the heat seal layer, it is possible to achieve a peel-bonded seal, i.e., a seal when joined. The packaging material of the present invention may be further provided with at least one layer of a polymer forming an oxygen barrier layer. For example, when packaging a liquid food, the packaging material will generally fold, so the oxygen barrier layer will be inside the fibrous substrate. The COC water vapor barrier layer can be advantageously applied to both sides of the material such that the fibrous substrate and the oxygen barrier layer can be sandwiched between the COC layers. The polymer on the inside of the packaging material is then formed into an oxygen and water vapor barrier, which protects the packaged product from air contact, while the packaging material -6 - the paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm)
線 五、發明説明（4 ) 之纖維基底不與包裝之產品接觸。包材外面之⑺ 層可保護纖維基底及氧氣障層免於外來水氣之渗人m 保包裝在所需之防腐期間維持其保護性質。 形成乳障層〈適當聚合物材料為伸乙缔乙缔基 物（EV0H)、聚醯胺（PA)及此等之化合物。材料中加入ς氧 障層之重量為3-15 g/m2，較好為5_1〇 g/m2。 、一本發明製造之包材可由包裝紙板形成，且其纖維基底 心重：r為130至500 g/m2之間，最好為17〇 3〇〇§化2。聚合物 塗佈之包裝紙板中-般係使用三層紙板當作纖維基底，二 薄層硫酸鹽紙衆間加人紙板之厚層化學熱機械紙裝 (CTMP)。另外’本發明涵蓋包裝紙，其中纖維基底之重量 一般為 20-120 g/m2 ,較好為 40-100 g/m2。 本發明之漱封包材係由摺疊及熱密封上述包材，且依據 本發明形成’因此包材之外表面含含有COC及外部熱密封 層之水蒸氣障層。因此，上述因外部之水氣滲透造成之纖 維基底及產物之所有水氣問題均可在該包裝中獲得解決。 另外’本發明之包材較好包括第二層COC水蒸氣障層及 可能之聚合物氧氣障層，其在指疊材料時，均留在纖維基 底内側之包裝内表面上。 本發明之包裝尤其可為由塗{布聚合物之紙板形成之錫或 盒狀包裝，或由塗佈聚合物之紙形成之袋狀包裝。由其提 及之包裝產品為乾燥及液態食品。 本發明將以實例參考附圖更詳細說明，其中 圖1 -13代表本發明不同具體例之包裝材料之層結構， 本纸張尺度適用中國國家標準(CNS) A4規格(21〇x 297公釐) 1301797 A7 B7 五、發明説明（5 ) 圖14代表本發明之錫包裝，其係由摺疊及熱密封之包裝 紙板製成，及 圖1 5為進行捲繞測量之結果之圖。 圖1中所示之塗佈聚合物之包裝紙板依序包括LDPE熱密 封層1、COC水蒸氣障層2、纖維基底3，其為例如由二硫酸 鹽紙漿層及一層在其間之化學-熱機械紙漿（CTMP)，COC 水蒸氣障層7及LDPE熱密封層8組成之三層紙板。LDPE及 COC層（1、2 ; 7、8)已經以擠出於一步驟中加於纖維基底 (3)之兩面。纖維基底之重量為例如250 g/m2，二COC層2, 7 之重量為例如15 g/m2，且二LDPE層1，8之重量為例如15 g/m2。因此，紙板為完全對稱之結構，因此其一 LDPE層1，8 可由由紙板摺疊之包裝之外表面，且其一可為内表面。由 於兩面上之水蒸氣障層，因此紙板尤其適用於氣候溫濕之 國家之乾燥食品包裝。 圖2中之包裝紙板依序包括LDPE熱密封層1、COC水蒸氣 障層2、纖維基底3、EVOH氧氣障層5、接枝聚乙烯之結合 劑層6，及LDPE熱密封層8。纖維基底（3)兩面疊加之塗層 (1、2 ; 5、6、8)係由共擠出製成。纖維基底3可包含上述 三層紙板，其重量為250 g/m2。第一層LDPE層及COC層2之 重量可為15 g/m2。EVOH層5之重量為例如5 g/m2，且結合劑 層6之重量為5 g/m2。第二層LDPE層8之重量為例如40 g/m2。紙板意指可摺疊成包材，因此包裝之外表面為第一 層較薄之LDPE層1，且内表面為第二層較厚之LDPE層8，使 得EVOH氧氣障層5留在包裝之纖維基底3之内側。該紙板係 -8 - 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐） 1301797 A7 B7 五、發明説明 用於包裝乾燥或液態食品，其中之COC層2保護材料之内表 面及需要之食品免於外來之水氣，且在包裝最内層之EVOH 層5及較厚之LDPE層8保護產品免於氧化，且保護材料之纖 維基底3免於因產物產生之水氣。 圖3之包裝紙板與圖2中所示不同之處僅在以EVOH取 代，該PA層4係用作氧障層，其厚度為例如7 g/m2。 圖4中，另顯示本發明紙板之具體例，其中之氧保護 層包含疊加之PA及EVOH層4, 5。二層4, 5之重量可為例如 5 g/m2 〇 圖5顯示包裝紙板，依序包括LDPE熱密封層1、COC水蒸 氣障層2、纖維基底3、EVOH氧氣障層5，例如接枝聚乙烯 之結合劑層6，COC水蒸氣障層7及LDPE熱密封層8。纖維 基底（3)兩面之疊加塗層（1，2 ; 5-8)均以擠出製備。纖維基 底可由上述三層紙板製成，且各LDPE及COC層1、2、7、8 層之重量可為15 g/m2，且EVOH及結合劑層之重量為5 g/m2。紙板意指摺疊之包裝，因此首先提及之LDPE層1為 包裝之外表面，且最後提及之LDPE層8為内表面，其中 EVOH層5留在包裝之纖維基底3之内側。該紙板尤其適用於 液體食品之包裝，其中纖維基底兩面上之COC層2、7對紙 板之其他層提供所需之水氣保護，同時EVOH層5形成保護 產品用之氧氣障層。 圖6中所示之包裝紙板與圖5中所示者不同僅在以重量 為例如7 g/m2之PA層4取代EVOH層當作氧氣障層。圖7另顯 示一具體例，其中之氧障層包含疊加之PA及EVOH層4、5， -9 - 本紙張尺度適用中國國家標準(CNS) A4规格(210X 297公釐)Line 5. The fiber substrate of the invention description (4) is not in contact with the packaged product. The (7) layer on the outside of the cladding protects the fibrous substrate and the oxygen barrier from the infiltration of foreign moisture to maintain its protective properties during the desired corrosion protection. Formation of a barrier layer <Appropriate polymer materials are ethylene hexaethyl amide (EV0H), polydecylamine (PA), and the like. The weight of the niobium barrier layer added to the material is 3-15 g/m2, preferably 5_1 〇 g/m2. A package made by the invention may be formed from a packaging paperboard having a fiber base weight: r of between 130 and 500 g/m2, preferably 17〇3〇〇§2. In polymer coated packaging paperboard, three layers of paperboard are used as the fibrous substrate, and two thin layers of sulphate paper are added to the thick layer of chemical thermomechanical paper (CTMP). Further, the present invention encompasses a wrapper wherein the weight of the fibrous substrate is generally from 20 to 120 g/m2, preferably from 40 to 100 g/m2. The enamel encapsulating material of the present invention is formed by folding and heat sealing the above-mentioned packaging material, and is formed according to the present invention. Therefore, the outer surface of the packaging material contains a water vapor barrier layer containing COC and an external heat sealing layer. Therefore, all of the above-mentioned moisture problems of the fiber substrate and products due to external moisture infiltration can be solved in the package. Further, the package of the present invention preferably comprises a second layer of COC water vapor barrier layer and possibly a polymeric oxygen barrier layer which, on the fingerboard material, remains on the inner surface of the package inside the fibrous substrate. The package of the present invention may especially be a tin or box-like package formed from a paper coated with a cloth or a bag-like package formed from a paper coated with a polymer. The packaging products mentioned are dry and liquid foods. The invention will be described in more detail by way of examples with reference to the accompanying drawings in which Figures 1-13 represent the layer structure of the packaging materials of the different embodiments of the invention, the paper scale applies to the Chinese National Standard (CNS) A4 specification (21〇x 297 mm). 1301797 A7 B7 V. INSTRUCTION DESCRIPTION (5) Figure 14 represents a tin package of the present invention, which is made of folded and heat-sealed packaging paperboard, and Figure 15 is a graph showing the results of winding measurement. The coated polymer coated paperboard shown in Figure 1 comprises, in order, an LDPE heat seal layer 1, a COC water vapor barrier layer 2, a fibrous substrate 3, which is, for example, a layer of disulfate pulp and a layer of chemical-hot therebetween. A three-layer paperboard consisting of mechanical pulp (CTMP), COC water vapor barrier layer 7 and LDPE heat seal layer 8. The LDPE and COC layers (1, 2; 7, 8) have been applied to both sides of the fibrous substrate (3) by extrusion in one step. The weight of the fibrous substrate is, for example, 250 g/m2, the weight of the two COC layers 2, 7 is, for example, 15 g/m2, and the weight of the two LDPE layers 1, 8 is, for example, 15 g/m2. Therefore, the paperboard is of a completely symmetrical structure, so that one of the LDPE layers 1, 8 can be the outer surface of the package folded by the cardboard, and one of them can be the inner surface. Due to the water vapor barrier on both sides, the board is especially suitable for dry food packaging in countries with warm climates. The packaging board of Figure 2 comprises, in order, an LDPE heat seal layer 1, a COC water vapor barrier layer 2, a fiber substrate 3, an EVOH oxygen barrier layer 5, a grafted polyethylene bond layer 6, and an LDPE heat seal layer 8. The coating (1, 2; 5, 6, 8) on both sides of the fibrous substrate (3) is made by co-extrusion. The fibrous substrate 3 may comprise the above three-layer paperboard having a weight of 250 g/m2. The first LDPE layer and the COC layer 2 may have a weight of 15 g/m2. The weight of the EVOH layer 5 is, for example, 5 g/m2, and the weight of the binder layer 6 is 5 g/m2. The weight of the second LDPE layer 8 is, for example, 40 g/m2. The cardboard means that it can be folded into a packaging material, so the outer surface of the packaging is the first thinner LDPE layer 1, and the inner surface is the second thicker LDPE layer 8, so that the EVOH oxygen barrier layer 5 remains in the packaged fiber. The inside of the substrate 3. The paperboard is -8 - the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 1301797 A7 B7 5. The invention description is used to package dry or liquid food, wherein the inner surface of the COC layer 2 protection material And the food in need is free of foreign moisture, and the EVOH layer 5 and the thicker LDPE layer 8 in the innermost layer of the package protect the product from oxidation, and the fibrous substrate 3 of the protective material is protected from moisture generated by the product. The packaging board of Fig. 3 differs from that shown in Fig. 2 only in that it is replaced by EVOH which serves as an oxygen barrier layer having a thickness of, for example, 7 g/m2. In Fig. 4, a specific example of the paperboard of the present invention is further shown, wherein the oxygen protective layer comprises superposed PA and EVOH layers 4, 5. The weight of the second layer 4, 5 may be, for example, 5 g/m2. Figure 5 shows the packaging board, including the LDPE heat seal layer 1, the COC water vapor barrier layer 2, the fiber substrate 3, the EVOH oxygen barrier layer 5, for example, grafting. A binder layer 6 of polyethylene, a COC water vapor barrier layer 7 and an LDPE heat seal layer 8. The superposed coating (1, 2; 5-8) on both sides of the fiber substrate (3) was prepared by extrusion. The fibrous substrate can be made of the above three-layer paperboard, and the weight of each of the LDPE and COC layers 1, 2, 7, and 8 can be 15 g/m2, and the weight of the EVOH and the binder layer is 5 g/m2. The cardboard means a folded package, so the first mentioned LDPE layer 1 is the outer surface of the package, and the last mentioned LDPE layer 8 is the inner surface, wherein the EVOH layer 5 remains inside the fibrous substrate 3 of the package. The paperboard is particularly suitable for use in liquid food packaging in which the COC layers 2, 7 on both sides of the fibrous substrate provide the desired moisture protection for the other layers of the paperboard, while the EVOH layer 5 forms an oxygen barrier for the protection product. The packaging paperboard shown in Fig. 6 differs from that shown in Fig. 5 only in that the EVOH layer is replaced by a PA layer 4 having a weight of, for example, 7 g/m2 as an oxygen barrier layer. Fig. 7 further shows a specific example in which the oxygen barrier layer comprises superposed PA and EVOH layers 4, 5, -9 - the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm).
線 1301797 A7 _________ B7 五、發明説明（7 ) 该一層之重量為例如5 g/m2。 圖8顯示本發明之包裝材料，其與圖1所示者不同僅再以 重量為例如80 g/m2之包裝紙3 ’取代三層紙板當作纖維基 底。 圖9揭示本發明之一具體例，其中包含c〇c水蒸氣障層7 及外LDPE熱密封層8之聚合物塗層僅擠出在纖維基底3之 一面上。換言之，纖維基底3之外側並沒有聚合物塗層。纖 維基底3可由包含硫酸鹽及CTMP層之三層紙板製成。當將 包裝紙板9摺疊成包裝時，聚合物塗層7、8可為包裝内表面 之外表面。 圖10之包裝紙板包括纖維基底3，其係依序擠出塗佈 EVOH層5、結合劑層6、COC層7及LDPE熱密封層8。纖維 基底3之一面上並沒有塗層。圖n另顯示塗佈一面之包裝紙 板’其中之纖維基底3依序具有塗層COC層10、結合劑層 11、EVOH層5、結合劑層ό、及LDPE層8。圖10及11之具體 例中’擠出之COC水蒸氣障層7、10並未捲繞紙板，與HDpE 水蒸氣障層不同。依二具體例，疊加之塗層一紙包裝摺疊 食之纖維基底3之内部。圖11之結構中，c 〇 C層1 〇則保護 EVOH氧氣障層5免於包裝外滲入之濕氣。 圖1 2中’顯示一種包裝紙板，其中纖維基底3之一面係 裝置共擠出之塗層結合物，依序包含LDpe層9、COC層1〇、 結合劑層11、EVOH層5、結合劑層6、COC層7及LDPE層8。 層結構對稱之纖維基底3(不含）較好係使層同時擠出達 成。另外，該結構中COC層10、7保護EV〇H氧氣障層5免於 -10 -Line 1301797 A7 _________ B7 V. Description of the Invention (7) The weight of this layer is, for example, 5 g/m2. Fig. 8 shows a packaging material of the present invention which, unlike the one shown in Fig. 1, is replaced with a three-layer cardboard as a fibrous substrate by a wrapping paper 3' having a weight of, for example, 80 g/m2. Fig. 9 discloses a specific example of the present invention in which a polymer coating comprising a c〇c water vapor barrier layer 7 and an outer LDPE heat seal layer 8 is extruded only on one side of the fiber substrate 3. In other words, there is no polymer coating on the outside of the fibrous substrate 3. The fibrous substrate 3 can be made of a three-layer paperboard comprising a sulfate and a CTMP layer. When the packaging board 9 is folded into a package, the polymer coatings 7, 8 may be the outer surface of the inner surface of the package. The packaging board of Fig. 10 comprises a fibrous substrate 3 which is sequentially extrusion coated with an EVOH layer 5, a bonding agent layer 6, a COC layer 7, and an LDPE heat sealing layer 8. There is no coating on one side of the fiber substrate 3. Figure n further shows a coated paper sheet of the coated side. The fibrous substrate 3 therein has a coated COC layer 10, a binder layer 11, an EVOH layer 5, a binder layer, and an LDPE layer 8. In the specific examples of Figs. 10 and 11, the extruded COC water vapor barrier layers 7, 10 are not wound with paperboard, unlike the HDpE water vapor barrier layer. According to a specific example, the superposed coating is wrapped in a paper to wrap the inside of the fiber substrate 3 of the food. In the structure of Fig. 11, c 〇 C layer 1 保护 protects the EVOH oxygen barrier layer 5 from moisture permeating outside the package. Figure 1 2 shows a packaging board in which a coating composition of a fiber substrate 3 coextruded by a device, comprising an LDpe layer 9, a COC layer 1 , a binder layer 11, an EVOH layer 5, a bonding agent. Layer 6, COC layer 7 and LDPE layer 8. Preferably, the fibrous substrate 3 (not containing) having a layer structure is symmetrically extruded at the same time. In addition, in the structure, the COC layer 10, 7 protects the EV〇H oxygen barrier layer 5 from -10 -
1301797 A7 B7 五、發明説明（8 ) 由二方向滲入之水氣。使用HDPE會使結構不穩定，因為其 會有強的捲繞傾向。 依圖10-12之具體例，EVOH氧氣障層5可以以聚醯胺層取 代，或將EVOH及聚醯胺層相互配置，當作氧氣保護，如圖 7中所示之結構。 圖13之具體例包括在其纖維基底3之一面上之相當於圖 9之烴出COC及LDPE層7、8，及在另一面上之LDPE層1。當 圖13之包裝紙板摺疊時，COC層7可在纖維基底4之外部， 依據任一時間之產品及纖維基底所需之保護而定。因為 COC之無定型性，因此材料不會有捲繞之傾向。 圖14可看出本發明錫包裝之實例，其係由摺疊或熱密封 由圖12之包裝紙板製成之空包材形成。紙板係位在包裝12 之中，使得纖維基底3外面之包裝外表面加上疊加之COC 及LDPE層2、1，因此在包裝中之纖維基底内部留下含EVOH 層5之四層塗層5-8。在包裝12之結合13處，空盒之邊緣已 經重疊，且紙板相反表面之LDPE層1、8已經相互緊密熱密 封。 下列實例進一步揭示以本發明之新穎包裝紙板進行之 試驗。試驗中所用之COC為TOPAS 8007 D 50(由TICONA GmbH銷售之產品）。 實例1，紙板之可密封性 COC對紙板及LDPE之黏性及熱密封狀態係藉由製造相 當於圖9之塗覆聚合物之紙板試驗，其中由纖維基底3形成 之背板之重量為210 g/m2，且其上之二塗層7、8之重量為10 -11 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐） 1301797 A7 B7 五、發明説明（9 ) g/m2。COC及LDPE層7、8彼此及對纖維基底3之黏著未發生 問題。另外，塗佈之紙板係針對熱密封試驗製造，其中在 相同之杯板基底上僅加上重量18 g/m2之LDPE層。該試驗 中，此等二塗覆之紙板係在不同環境下彼此熱密封，LDPE 層係彼此相對。試驗結果列於下表1中。 表1 ' 各溫度之黏著力(％) ‘ 結合時間 (S) 200°C 225°C 250°C 275°C 0.5 25% 25-50%, 柔軟 50%, 不牢 25% 1.0 50% 50-75%, 柔軟 · 50-75%, 25-50% 2.0 75% 100%, 不牢 75-100%, 不牢 100%, 不丰 依據表中，結合時間為0.5、1.0、或2.0秒，且結合溫度 為200、225、250或275°C。結合所用之壓力為〇·8 N/mm2。由 結果可看出對於0.5及1.0秒之結合時間，其結合在所有試 驗之結合溫度下並不足。然而對於2.0秒之結合時間，在溫 度為225及275°C下可達到完全（100%)之結合。結果顯示藉由 增加結合時間，可達成緊密、防止洩漏之熱密封結合。明 顯的可藉由增加結合壓力加速結合。 實例2，紙板之捲繞 製造三種不同系列之包裝紙板供試驗用，其中重量為190 g/m2之杯板以（1) 一單一 LDPE層擠出塗覆，重量在10至60 g/m2之間，（2)以COC層及外層LDPE層塗覆，使得COC層之 -12 - 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐） 1301797 A7 B7 _________ 五、發明説明（1〇 ) 重量在10至40 g/m2之間，且LDPE層之重量在各例中為20 g/m2，及（3)以包含COC層、HDPE層及LDPE層之三層結構 塗覆，其中（：〇(：層之重量為10至4(^/1112，11〇?£層之重量為 10或15 g/m2，且LDPE層之重量在各例中為10 g/m2。捲繞係 由盤狀試驗片，尤其反應依據ISO 11556標準測量。結果見 於圖1 5中。 當比較塗覆COC及LDPE層之紙板及僅塗覆LDPE層之紙 板之捲繞時，可看出與LDPE相比較，C0C不會增加捲繞， 但當塗覆之聚合物總量相同時則會下降《因此當塗層結合 物亦含HDPE層時，紙板之捲繞可明顯增加。考量未捲繞之 材料，COC取代HDPE作為水蒸氣障層之優點在試驗基準上 相當的明顯。 實例3，水蒸氣之滲透 水蒸氣滲透（WVTR)係由一系列包括COC層之塗覆聚合 物之包裝紙板，在溫度38°C，相對溼度90%下測量。各情 況下使用重量為190 g/m2之杯板當作纖維基底3，且擠出之 多層塗層包含（除C0C外）COC及LDPE之混合物，不同厚度 層之高密度（HD)及集中密度（MD) HDPE及LDPE。 研究之結構（其中數值為層重量（g/m2))及測量之水蒸氣 滲透（g/m2/d)系列於下表2中。 參考之塗覆HDPE/LDPE之數種紙板之水蒸氣滲透值（其 並未含C0C(基本之紙板190、250及270 g/m2))已包含於表 中 〇 表2 _ - 13 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐） 1301797 A7 B7 五、發明説明（11 ) 層結構 WVTR (g/m2/d) 紙板 190+ COC 10+ HDPE (HD) 10+ LDPE 10 6.59 紙板 190+ COC 40+ HDPE (HD) 10+ LDPE 10 2.79 紙板 190 + COC 10 +LDPE 20 8.37 紙板 190 + COC40 + LDPE 20 3.03 紙板 190 + LDPE 10 + COC 10 + LDPE 10 6.70 紙板 190+ LDPE 10+ COC 40+ LDPE 10 3.21 紙板 190 + COC mixture 10 + HDPE (MD) 10 + LDPE 10 7.18 紙板 190 +COC mixture 40 + HDPE (MD) 10 + LDPE 10 2.21 參考材料： 紙板 190+ LDPE 10+ HDPE 20+ LDPE 10 5.8 紙板 250 +HDPE 20 +LDPE 10 7.8 紙板 270 + HDPE 40 + LDPE 10 4.6 由結果可看出COC之水蒸氣保護性質至少等於HDPE，且 其可如此般或與LDPE混合使用。 本發明具體之可能性並不受限於如上述實例所示者，但 其可在專利之申請專利範圍之範圍中變化。 -14 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐)1301797 A7 B7 V. INSTRUCTIONS (8) Water vapor infiltrated by two directions. The use of HDPE can destabilize the structure because it has a strong tendency to wind. According to the specific example of Figs. 10-12, the EVOH oxygen barrier layer 5 may be replaced by a polyamine layer, or the EVOH and polyamine layers may be mutually disposed as oxygen protection, as shown in Fig. 7. The specific example of Fig. 13 includes the hydrocarbon-out COC and LDPE layers 7, 8 on one side of the fiber substrate 3, and the LDPE layer 1 on the other side. When the packaging board of Figure 13 is folded, the COC layer 7 can be external to the fibrous substrate 4, depending on the desired protection of the product and the fibrous substrate at any one time. Because of the amorphous nature of COC, there is no tendency for the material to wrap. Fig. 14 shows an example of the tin package of the present invention which is formed by folding or heat sealing an empty packaging material made of the packaging paper of Fig. 12. The cardboard is positioned in the package 12 such that the outer surface of the outer surface of the fibrous substrate 3 is superposed with the COC and LDPE layers 2, 1 so that a four layer coating comprising the EVOH layer 5 is left inside the fibrous substrate in the package 5 -8. At the junction 13 of the package 12, the edges of the empty boxes have overlapped and the LDPE layers 1, 8 of the opposite surface of the paperboard have been tightly sealed to each other. The following examples further disclose experiments conducted with the novel packaging board of the present invention. The COC used in the test was TOPAS 8007 D 50 (a product sold by TICONA GmbH). Example 1. Sealability of Paperboard The tackiness and heat-sealing state of COC to paperboard and LDPE was tested by making a paperboard equivalent to the coated polymer of Figure 9, wherein the weight of the backsheet formed from the fibrous substrate 3 was 210. g/m2, and the weight of the two coatings 7, 8 on it is 10 -11 - the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) 1301797 A7 B7 V. Description of invention (9) g /m2. The adhesion of the COC and LDPE layers 7, 8 to each other and to the fibrous substrate 3 did not occur. In addition, the coated paperboard was produced for a heat seal test in which only a LDPE layer having a weight of 18 g/m2 was applied to the same cup substrate. In this test, the two coated paperboards were heat sealed to each other under different environments, and the LDPE layers were opposed to each other. The test results are listed in Table 1 below. Table 1 'Adhesion at each temperature (%) ' Combination time (S) 200 ° C 225 ° C 250 ° C 275 ° C 0.5 25% 25-50%, soft 50%, not 25% 1.0 50% 50- 75%, soft · 50-75%, 25-50% 2.0 75% 100%, not 75-100%, not 100%, not according to the table, the bonding time is 0.5, 1.0, or 2.0 seconds, and The bonding temperature is 200, 225, 250 or 275 °C. The pressure used in combination is 〇·8 N/mm2. From the results, it was found that for the bonding time of 0.5 and 1.0 seconds, the combination was insufficient at the combined temperature of all the tests. However, for a binding time of 2.0 seconds, a complete (100%) combination was achieved at temperatures of 225 and 275 °C. The results show that by increasing the bonding time, a tight, leak-proof heat seal combination can be achieved. It is obvious that the combination can be accelerated by increasing the bonding pressure. Example 2, Winding of Paperboard Three different series of packaging paperboards were produced for testing, in which a cup board weighing 190 g/m2 was extrusion coated with (1) a single LDPE layer and weighing 10 to 60 g/m2. (2) coated with COC layer and outer LDPE layer, so that the COC layer -12 - the paper scale is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) 1301797 A7 B7 _________ V. Description of invention ( 1)) The weight is between 10 and 40 g/m2, and the weight of the LDPE layer is 20 g/m2 in each case, and (3) is coated with a three-layer structure comprising a COC layer, an HDPE layer and an LDPE layer. Where (: 〇 (: layer weight is 10 to 4 (^/1112, 11 〇? layer layer weight is 10 or 15 g/m2, and the weight of the LDPE layer is 10 g/m2 in each case. Winding It is measured by a disc-shaped test piece, especially the reaction according to the ISO 11556 standard. The results are shown in Figure 15. When comparing the winding of the paperboard coated with COC and LDPE layers and the paperboard coated with only the LDPE layer, it can be seen with LDPE. In contrast, COC does not increase the winding, but it drops when the total amount of polymer coated is the same. Therefore, when the coating combination also contains the HDPE layer, the winding of the paperboard can be noticeable. Considering the unwound material, the advantage of COC replacing HDPE as a water vapor barrier is quite obvious on the test basis. Example 3, water vapor permeation water vapor permeation (WVTR) is coated by a series of COC layers. The packaging board of the polymer is measured at a temperature of 38 ° C and a relative humidity of 90%. In each case, a cup plate having a weight of 190 g/m 2 is used as the fiber substrate 3, and the extruded multilayer coating contains (except for the COC). a mixture of COC and LDPE, high density (HD) and concentrated density (MD) HDPE and LDPE of different thickness layers. Structure of the study (where the value is the layer weight (g/m2)) and the measured water vapor permeation (g/) The m2/d) series are listed in Table 2. The water vapor permeability values of several types of paperboard coated with HDPE/LDPE (which do not contain COC (basic cardboard 190, 250 and 270 g/m2)) are included in Table 2 _ - 13 - This paper scale applies to Chinese National Standard (CNS) A4 specification (210X 297 mm) 1301797 A7 B7 V. Invention description (11) Layer structure WVTR (g/m2/d) Cardboard 190+ COC 10+ HDPE (HD) 10+ LDPE 10 6.59 Cardboard 190+ COC 40+ HDPE (HD) 10+ LDPE 10 2.79 Cardboard 190 + COC 10 +LDPE 20 8.37 Cardboard 190 + COC40 + LDPE 20 3.03 Cardboard 190 + LDPE 10 + COC 10 + LDPE 10 6.70 Cardboard 190+ LDPE 10+ COC 40+ LDPE 10 3.21 Cardboard 190 + COC mixture 10 + HDPE (MD) 10 + LDPE 10 7.18 Cardboard 190 +COC mixture 40 + HDPE (MD) 10 + LDPE 10 2.21 Reference material: Cardboard 190+ LDPE 10+ HDPE 20+ LDPE 10 5.8 Cardboard 250 + HDPE 20 + LDPE 10 7.8 Cardboard 270 + HDPE 40 + LDPE 10 4.6 It can be seen from the results that the water vapor protection properties of COC are at least equal to HDPE, and it can be used in such a manner or in combination with LDPE. The specific possibilities of the present invention are not limited to those shown in the above examples, but they may vary within the scope of the patent application. -14 - This paper size is applicable to China National Standard (CNS) A4 specification (210X 297 mm)