摘要:
A multilayer film suitable for sealing containers such as used for food packaging, and methods of making the film, are described. The film is particularly suitable for sealing containers made from polylactic acid (PLA). The multilayer film includes: a) a substrate that includes a polymeric base layer; and b) on the substrate, a heatseal layer containing a PLA homopolymer or copolymer. The heatseal layer further includes dispersed therein an adhesion promoter, or alternatively the substrate further includes the adhesion promoter in a layer on a surface of the polymeric base layer between and adjacent the base layer and the heatseal layer. An antifog agent may also be included in the heatseal layer or on the surface of the heatseal layer opposite the substrate.
摘要:
A lid (2) for closing a cup (1) along a peripheral sealing edge (10) and a method for producing such a lid. The lid includes at least one aluminum film and an optionally multi-layered plastic layer which is co-extruded onto the aluminum film and has a closed predetermined tearing line (3). The plastic layer is made of plastic based on polyethylene (PE) or plastic based on polypropylene (PP), and the predetermined tearing line is introduced into the plastic layer preferably by means of a CO2 laser. The predetermined tearing line (3) may be provided directly in the region of the sealing edge (10).
摘要:
Providing a packaging body and a film made of resin (a resin-made film) used therefor that can store the remaining contents even after a part of the contents is taken out, wherein the packaging body is easily openable and closable without providing a zipper, has a storage property equal to that of a body provided with a zipper, and can be manufactured at a low cost.The resin-made film is constructed with at least an outer layer 6, an inner layer 7, and an adhesive layer 8 in the middle thereof formed by applying an adhesive onto the outer layer 6 and/or the inner layer 7; the adhesive is releasable and re-adherable; and at least a part of the adhesive layer 8 is formed by a combination of an adhesive part 8b where said adhesive is continuously applied and a non-adhesive part 8a where said adhesive is discontinuously applied or a non-adhesive part 8c where the adhesive is not applied.
摘要:
A purge dam for retaining a purge gas around a weld zone includes a purge dam structure configured to substantially obstruct an air passage leading to the weld zone. The purge dam includes a main blocking portion configured to substantially block the air passage. The purge dam structure further includes a wall portion configured to engage the air passage for attachment. Adhesive can be optionally provided on the wall portion to facilitate the air passage attachment. Some or all of the purge dam structure may be formed as a multi-layer structure that includes one or more layers of water degradable paper and one or more layers of water degradable polymer. If present, the optional adhesive may be applied to the water degradable polymer layer. The purge dam may be installed by placing the purge dam in the air passage and adhering the wall portion thereto.
摘要:
A method for manufacturing a composite article of polytetrafluoroethylene and silicone includes: (a) providing a UV-curable silicone: (b) applying the UV-curable silicone to a polytetrafluoroethylene backing; and (c) exposing the UV-curable silicone to UV radiation sufficient to cure the silicone.
摘要:
A lid (2) for closing a cup (1) along a peripheral sealing edge (10) and a method for producing such a lid. The lid includes at least one aluminum film and an optionally multi-layered plastic layer which is co-extruded onto the aluminum film and has a closed predetermined tearing line (3). The plastic layer is made of plastic based on polyethylene (PE) or plastic based on polypropylene (PP), and the predetermined tearing line is introduced into the plastic layer preferably by means of a CO2 laser. The predetermined tearing line (3) may be provided directly in the region of the sealing edge (10).
摘要:
A purge dam for retaining a purge gas around a weld zone includes a purge dam structure configured to substantially obstruct an air passage leading to the weld zone. The purge dam includes a main blocking portion configured to substantially block the air passage. The purge dam structure further includes a wall portion configured to engage the air passage for attachment. Adhesive can be optionally provided on the wall portion to facilitate the air passage attachment. Some or all of the purge dam structure may be formed as a multi-layer structure that includes one or more layers of water degradable paper and one or more layers of water degradable polymer. If present, the optional adhesive may be applied to the water degradable polymer layer. The purge dam may be installed by placing the purge dam in the air passage and adhering the wall portion thereto.
摘要:
A cross-laminated film comprising at least a two layers and including a thermoplastic component and an elastic component to provide special elastic characteristics for certain packaging and wrapping applications.
摘要:
A method for producing a primary laminate including a tabstock the steps of; feeding a seal laminate comprising bottom food contact layers including a foil layer and a top polyester layer to a laminating station wherein either the foil layer or the underside of the polyester layer has been printed; simultaneously feeding a tabstock, which is narrower than the seal laminate, to the laminating station such that the bottom of the tabstock and the top polyester layer of the seal laminate come into contact to form a primary substrate, the top face of which is partly comprised of the top face of the tabstock and partly comprised of the top polyester layer of the heat sealable laminate, prior to reaching the laminating station; simultaneously feeding a plastic film stock which has top and bottom surfaces to the laminating station; and continuously extruding a polymeric adhesive between the top face of the primary substrate and bottom surface of the plastic film stock such that the two are adhered together with a bond strength greater than 15 N/cm as measured when the tabstock is pulled at 90° to the machine direction and at 180° to the primary substrate to form a primary laminate including a tabstock. The primary laminate formed can then be laminated to a board or synthetic secondary liner.