Multilayer PSA construction exhibiting reduced tackifier migration
    102.
    发明授权
    Multilayer PSA construction exhibiting reduced tackifier migration 有权
    多层PSA结构显示降低的增粘剂迁移

    公开(公告)号:US06183862B2

    公开(公告)日:2001-02-06

    申请号:US09158990

    申请日:1998-09-23

    Abstract: A multilayer PSA construction includes a facestock, a hazy, first adhesive layer adjacent the facestock, and a PSA layer adjacent the first adhesive layer, and is protected until use by a release liner. The first adhesive layer includes an immiscible blend of a first elastomer having a first glass transition temperature and forming a continuous phase, and a second elastomer forming a discontinuous phase. The second elastomer has a glass transition temperature greater than the first glass transition temperature. The first adhesive layer also contains a tackifying component, which is preferentially soluble in the discontinuous phase. The PSA layer has a composition different from the first adhesive layer and is formed of at least one tackified elastomer that provides a measurable third maximum glass transition temperature, which is less than the second glass transition temperature. The multilayer PSA construction exhibits reduced migration of tackifiers and plasticizers over time.

    Abstract translation: 多层PSA结构包括与面材相邻的面材,模糊的第一粘合剂层和邻近第一粘合剂层的粘合剂层,并且被保护直到被剥离衬垫使用。 第一粘合剂层包括具有第一玻璃化转变温度并形成连续相的第一弹性体和形成不连续相的第二弹性体的不混溶共混物。 第二弹性体的玻璃化转变温度大于第一玻璃化转变温度。 第一粘合剂层还含有优选溶解在不连续相中的增粘组分。 PSA层具有不同于第一粘合剂层的组成,并且由至少一种增强的弹性体形成,其提供小于第二玻璃化转变温度的可测量的第三最大玻璃化转变温度。 多层PSA结构显示出随着时间的推移,增粘剂和增塑剂的迁移减少。

    Releasable closure for bags and containers
    107.
    发明授权
    Releasable closure for bags and containers 失效
    袋和容器的可拆卸封盖

    公开(公告)号:US4543139A

    公开(公告)日:1985-09-24

    申请号:US651443

    申请日:1984-09-17

    Abstract: Adjoining strata of pressure-sensitive adhesive are transferred to a package substrate. The two outermost adhesive strata have different adhesion to the substrate. The adhesive strata are used as a reclosable fastener and are intermixed in the course of reclosing and reopening the package, the action being such as to advantageously compensate for contamination occurring at the reseal interface while maintaining the status quo at the permanent interface.

    Abstract translation: 相邻的压敏粘合剂层转移到封装衬底。 两个最外层的粘合剂层对基材具有不同的粘合性。 粘合剂层用作可重新闭合的紧固件,并且在重新封闭和重新打开包装的过程中混合,其作用是有利地补偿在重新密封界面处发生的污染物,同时保持在永久界面处的状态。

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