摘要:
The invention concerns a heat-sealable biodegradable packaging material, which comprises a fibrous substrate (1) and one or more polymer coating layers (2) extruded onto said substrate. According to the invention the packaging material includes at least one polymer coating layer (2) containing at least 70 weight-% of polylactide (PLA) and at least 5 weight-% of polybutylene succinate (PBS) or its derivate blended therewith. Optionally an acryl copolymer such as ethylene butyl acrylate glycidyl methacrylate terpolymer (EBAGMA) may be included in the polymer blend. The invention further concerns a heat-sealed container, such as a disposable drinking cup, and a heat-sealed product package made from the packaging material, as well as uses of PBS or its derivates as blends with PLA in extrusion coating, for improving adhesivity of the coating to the fibrous substrate and reduced raw edge penetration to the packaging material, especially penetration of hot coffee held in the drinking cup.
摘要:
The invention concerns a heat-sealable biodegradable packaging material, which comprises a fibrous substrate and one or more polymer coating layers extruded onto said substrate. According to the invention the packaging material includes at least one polymer coating layer containing polylactide and at least about 1 weight-% of terpene phenolic resin blended therewith. The invention further concerns a heat-sealed product package made from the packaging material, as well as uses of the resin as blends with polylactide in extrusion coating, for improving line speed and neck-in in extrusion, adhesivity of the coating to the fibrous substrate, and heat-sealability of the coating.
摘要:
The invention concerns a heat-sealable biodegradable packaging material, which comprises a fibrous substrate (1) and one or more polymer coating layers (2) extruded onto said substrate. According to the invention the packaging material includes at least one polymer coating layer (2) containing at least 70 weight-% of polylactide (PLA) and at least 5 weight-% of polybutylene succinate (PBS) or its derivate blended therewith. Optionally an acryl copolymer such as ethylene butyl acrylate glycidyl methacrylate terpolymer (EBAGMA) may be included in the polymer blend. The invention further concerns a heat-sealed container, such as a disposable drinking cup, and a heat-sealed product package made from the packaging material, as well as uses of PBS or its derivates as blends with PLA in extrusion coating, for improving adhesivity of the coating to the fibrous substrate and reduced raw edge penetration to the packaging material, especially penetration of hot coffee held in the drinking cup.
摘要:
The invention concerns a heat-sealable biodegradable packaging material, which comprises a fibrous substrate and one or more polymer coating layers extruded onto said substrate. According to the invention the packaging material includes at least one polymer coating layer containing polylactide and at least about 1 weight-% of terpene phenolic resin blended therewith. The invention further concerns a heat-sealed product package made from the packaging material, as well as uses of the resin as blends with polylactide in extrusion coating, for improving line speed and neck-in in extrusion, adhesivity of the coating to the fibrous substrate, and heat-sealability of the coating.
摘要:
A polymer-coated oven board includes a coating that contains an oxygen barrier layer of polyamide (PA) and a surface layer of polyethylene terephthalate (PET) adhered to the oxygen barrier layer. These layers are produced onto the board by co-extrusion without a binding agent layer between them. The weight of the PA oxygen barrier layer is 3-15 g/m2, and the weight of the PET surface layer is 20-50 g/m2. An oxygen impermeable food package heatable in an oven includes the oven board wherein the superimposed polyamide and PET layers are located inside the board layer in the package. The oven board may also include a PET surface layer on the opposite side of the board. Polyamide has been selected so that it withstands heat sealing and the heating of the package in an oven.
摘要翻译:聚合物涂覆的烘箱板包括含有聚酰胺(PA)的氧阻隔层和粘附到氧阻隔层的聚对苯二甲酸乙二醇酯(PET)的表面层的涂层。 这些层通过共挤出而在它们之间没有粘合剂层而在板上生产。 PA氧阻隔层的重量为3-15g / m 2,PET表面层的重量为20-50g / m 2。 在烤箱中可加热的不透氧食品包装包括烤箱板,其中叠加的聚酰胺和PET层位于包装中的板层内。 烤箱板还可以包括在板的相对侧上的PET表面层。 已选择聚酰胺,以便它能够在烤箱中承受热封和包装的加热。
摘要:
The invention relates to a manufacturing method of a heat-sealable packaging material, a polymer-coated packaging material manufactured using the method, and a sealed package to be manufactured of the material. The packaging material comprises a fibre base, such as a packaging board (5), and an inner, extruded water vapour barrier layer (2, 9) on both sides, containing high-density polyethylene (HDPE), and an outer heat sealing layer (1, 10), the material of which is, for example, low-density polyethylene (LDPE). Further, polymeric oxygen barrier layers (7) can be incorporated in the packaging material, the material of the oxygen barrier layers being, for example, ethyl vinyl alcohol copolymer (EVOH) or polyamide (PA). With the HDPE layer, the permeation of water vapour is prevented to both directions, and the location of the extruded layers on both sides of the fibre base reduces the curling of the material. The packages according to the invention comprise carton, box and bag packages for dry and liquid foods.
摘要:
The invention relates to a polymer-coated Polymer-coated heat-sealable packaging material, heat-sterilized package formed from the material, and use of the packaging material. The material comprises a fiber base 4 (e.g., packaging board made of bleached pulp) with polymer heat-seal layers 1,9 located on both sides thereof. The package comprises, outside the fiber base, first polymer coating layer 2, which contains white pigment for covering the fiber base from sight, and second coating layer 8, which contains light-absorbing pigment. A coating layer pigmented grey inside the fiber base may provide a light shield for the packaged product. Absorbent black pigment may be located outside the fiber base underneath the white layer to stabilize the brightness of the material. A heat-sterilized package is made by providing the packaging material, forming a package containing, e.g., food, and heat-sterilizing the package in an autoclave. Yellowing of the fiber-based material is avoided by means of a white pigment.
摘要:
A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.
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:
The invention relates to a polymer-coated heat-sealable packaging material, to a heat-sterilised package formed from this and to the use of the packaging material. The material comprises a fibre base (4), which is e.g. a packaging board made of bleached pulp, and polymer heat-seal layers (1, 9) located on both sides of this. In accordance with the invention, the package comprises, outside the fibre base, a polymer coating layer (2), which contains white pigment for covering the fibre base from sight, and a second coating layer (8), which contains light-absorbing pigment. A coating layer pigmented grey inside the fibre base, for instance, provides a light shield for the packaged product. The absorbent black pigment may also be located outside the fibre base underneath a white layer in order to stabilise the brightness of the material. The package may be e.g. a food package heat-sterilised in an autoclave, in which yellowing of the fibre-based material has been avoided by means of a white pigment.