| 摘要 |
A packaging material for reclosable bags and methods for making same. The material includes a standard packaging material substrates including an initial seal layer, typically for forming a heat seal. A layer of a secondary seal material, typically a tacky material such as a pressure sensitive adhesive is applied in localized areas corresponding to the seal area for the bag. The initial seal layer may have a reduced thickness in this localized area to reduce thickness variation in the finished material. An outer seal layer is provided over the secondary seal area. This outer seal layer may be localized to cover only the secondary seal layer. The outer seal layer may additionally or alternatively have a reduced thickness in the localized area of the secondary seal layer to again reduce thickness variation. Various process are available for providing the layers. In one embodiment, the secondary and outer seal layers are applied by use of a ribbon coater. This application may be directly upon the substrate, or upon a release sheet for later transfer to the substrate.
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