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892results about "Wrappers shrinkage" patented technology

Stretch wrap films

InactiveUS6093480AImprove clingImproved maximum stretchWrappers shrinkageSynthetic resin layered productsStretch wrapGram
A multilayer, thermoplastic stretch wrap film containing at least three polymeric film layers and comprised of a first layer and a second layer. The first and second layers may comprise a polymer of two or more monomers, wherein a first monomer is ethylene, in a major amount by weight, and a second monomer is an alpha olefin of from about 3 to about 12 carbon atoms, in a minor amount by weight. If the first and second layers are outer layers, they have a cling force to each other of at least about 140 grams/inch. The stretch wrap film also has at least one inner polymeric layer, located between the first and second layers. The inner polymeric layer comprises a low polydispersity polymer having a polydispersity of from about 1 to about 4, a melt index (I.sub.2) of from about 0.5 to about 10 g/10 min., and a melt flow ratio (I.sub.20 /I.sub.2) of from about 12 to about 22. The inner layer(s) comprise(s) from about 5 wt. % to about 40 wt. % of the stretch wrap film so as to produce a film having a maximum stretch of at least 340%, a F-50 dart drop value of at least about 130 g/mil, a machine directional tear resistance of at least about 125 g/mil and a transverse directional tear resistance of at least about 500 g/mil. It is contemplated that additional outer layers may be added such an outer high cling layer or an outer slip layer, as well as additional inner layers.
Owner:BERRY PLASTICS CORP

Trilaminar co-extrusion thermal contraction resin film, manufacturing method and application method thereof

The invention discloses a three-layer coextrusion heat shrinkage resin film, a production method and an application method. The-three layer coextrusion heat shrinkage resin film is produced by taking PE(LDPE, HPPE, LLDPE, mPE), EVA, PP, PA and EVOH resins as the main materials which are matched with a functional master batch and adopting a production method of one-step huffing. The largest transverse and longitudinal shrinking rates of the product can reach 60 percent and 85 percent; the largest shrinking force of the product can reach 2.0N/cm. The shrinking rate and the shrinking force of the product can be controlled and adjusted by controlling various technical parameters to lead a package to be firm and endurable. The packaged objects are pertinently led to reach the anti-rust, anti static, illumination-resistance, anti-aging, anti-puncturing, anti-low-temperature, anti-isolation, anti-bacteria and anti-degradation effects and the like by adjusting the material composition and mixture ratio of each layer. The three-layer coextrusion heat shrinkage resin film is used for replacing the traditional paper box wrappage to reduce the packaging cost. The mechanical properties are good, the pertinence is strong, the materials are saved; when the three-layer coextrusion heat shrinkage resin film is used, the shrinking temperature is low, the power is saved and the packaging cost is saved, thus effectively reducing the production cost and having extremely high application value.
Owner:大连华诺塑胶科技有限公司

Splitting system and splitting method of paper currency packaging bag production line

The invention discloses a splitting system and a splitting method of a paper currency sealing bag production line. The splitting system is composed of a paper money bunch splitting system, a paper money bundle splitting system and a computer control system, wherein the paper money bunch splitting system is composed of a counting buncher, an automatic sealing mechanism, a paper money bunch splitting mechanism and a thin film paper money bundling machine; and the paper money bundle splitting system is composed of a loose bundle detecting and information collecting unit, an on-line weighing machine, a rejecting mechanism, a plastic seal shrinker, an automatic labeler and a paper money bundle splitting mechanism. The invention also relates to paper money bunch and paper money bundle splitting methods. The splitting method comprises the steps that the paper money bunch splitting mechanism for identifying the bundle variety splitting, a loose bundle detecting and information collecting unit for detecting whether the paper money bundle is loose and sealed and the paper money bundle splitting mechanism for identifying the bundle variety splitting, which are supported by conveyer belts (A and B) are used for sealing and splitting the paper money from the paper money bunch to the paper money bundle. The splitting system has the online use functions of multiple outlets of single or multiple counting and splitting machines and one outlet of different bundle varieties, and fully ideal paper currency sealing complete equipment in a banking system.
Owner:秦静 +3
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