Aluminum-colored multilayer heat-sealable packaging material
    1.
    发明授权
    Aluminum-colored multilayer heat-sealable packaging material 有权
    铝色多层热封包装材料

    公开(公告)号:US07329460B2

    公开(公告)日:2008-02-12

    申请号:US10181357

    申请日:2001-04-09

    IPC分类号: B32B9/04 B32B27/08

    摘要: The invention relates to a multi-layer heat-sealable packaging material especially for food packages. In addition, objects of the invention are a food package formed of the said packaging material, a method of packaging, and the use of the material for packages. The packaging material (1) comprises a middle layer (3) of fibre material, such as cardboard; at least one polymeric protective layer (4, 5) protecting the product from going bad; and polymeric heat sealing layers (2, 7) preferably on both sides of the packaging material. According to the invention, the heat sealing layer (7) forming the inner surface of the closed package, is blended with light-absorbing pigment, such as carbon black, for protecting the product from visible light. By further blending white pigment, such as titanium dioxide, into the heat sealing layer (7), a grey tint resembling an aluminium foil has been achieved for the layer. The heat sealing polymer may be low-density polyethylene (PE-LD), and an oxygen and aroma proof sealing layer (4) of, for example, ethylene vinyl alcohol copolymer (EVOH) or polyamide (PA) may be provided between it and the cardboard (3).

    摘要翻译: 本发明涉及特别用于食品包装的多层可热封包装材料。 此外,本发明的目的是由所述包装材料形成的食品包装,包装方法和用于包装的材料的使用。 包装材料(1)包括纤维材料的中间层(3),例如纸板; 至少一个保护产品不会变坏的聚合物保护层(4,5); 和聚合物热封层(2,7),优选在包装材料的两侧。 根据本发明,形成封闭封装的内表面的热封层(7)与诸如炭黑的光吸收颜料混合,以保护产品免受可见光的影响。 通过将白色颜料(例如二氧化钛)进一步混合到热封层(7)中,已经实现了类似于铝箔的灰色层。 热封聚合物可以是低密度聚乙烯(PE-LD),并且可以在其与...之间提供例如乙烯 - 乙烯醇共聚物(EVOH)或聚酰胺(PA)的氧气和香气密封层(4) 纸板(3)。

    Process for producing a polyethylene coating on a substrate
    5.
    发明授权
    Process for producing a polyethylene coating on a substrate 有权
    在基材上生产聚乙烯涂层的方法

    公开(公告)号:US07048882B2

    公开(公告)日:2006-05-23

    申请号:US10204321

    申请日:2001-02-19

    摘要: This invention concerns a process for coating a substrate, and an extrusion coating structure. According to the present process, the coating is provided by producing a bimodal polyethylene composition by subjecting ethylene, optionally with hydrogen and/or comonomers to polymerization or copolymerization reactions in a multistage polymerization sequence of successive polymerization stages. The polymerization reactions are carried out in the presence of a single site catalyst capable of forming a composition which comprises a low molecular weight component with an MFR2 of 20 g/10 min or more and a density higher than the density of the composition, and a high molecular weight component, said composition having a melt flow rate MFR2 of 5 g/10 min or more and a density of 915–960 kg/m3. The composition is extruded on the substrate as such or by adding 10 wt-% or less, calculated from the total weight of the coating, of high pressure PE-LD by blending into the extrusion composition or by coextrusion.

    摘要翻译: 本发明涉及一种涂覆基材和挤出涂布结构的方法。 根据本发明的方法,通过在连续聚合阶段的多级聚合顺序中使乙烯(任选地与氢和/或共聚单体)进行聚合或共聚反应来制备双峰聚乙烯组合物来提供涂层。 聚合反应在能够形成组合物的单中心催化剂的存在下进行,所述组合物包含20分钟/ 10分钟以上的MFR 2的低分子量组分,密度高于 所述组合物的密度和高分子量组分,所述组合物具有5g / 10min以上的熔体流动速率MFR 2和915-960kg / m 2的密度, 3 。 将该组合物原样挤出到基材上,或者通过混合到挤出组合物中或通过共挤出,通过加入由涂层的总重量计算的10重量%或更少的高压PE-LD。