摘要:
Closure liner, i.e., innerseal, comprising a pressure-activated adhesive that is a copolymer of butadiene and acrylonitrile or methacrylonitrile. The copolymer has a single glass transition temperature of no higher than about -25.degree. C., a nitrile content of no greater than about 31% by weight, preferably of from about 18% by weight to about 30% by weight, a Mooney viscosity of at least 95 (measured according to ASTM D1646-87 at 100.degree. C. for 4 minutes), preferably from about 120 to about 150. The copolymer is not cross-linked, and the amount of vinyl groups in the copolymer should not exceed 10% by weight.
摘要:
Innerseal suitable for use with containers made from glass. The innerseal of this invention comprises a facing bearing a layer of amorphous polyester on one major surface thereof. The innerseal forms a strong bond to glass and resists moisture better than do conventional innerseals.
摘要:
A substrate is coated with a polyvinylpyrrolidone-polyurethane interpolymer. In the method, a polyisocyanate and a polyurethane in a solvent such as methyl ethyl ketone are applied to a substrate and the solvent evaporated. If the substrate is a polyurethane, only the polyisocyanate need be employed. Polyvinylpyrrolidone in a solvent is then applied to the treated substrate and the solvent evaporated. The invention is applied, for example, to a tube such as a catheter, a condom and a peristaltic pump tube.
摘要:
A polymeric imaging medium comprising a receptor layer and an optional backing layer particularly useful in electrophotographic printing processes with liquid toners comprising thermoplastic toner particles in a liquid carrier that is not a solvent for the particles at a first temperature and that is a solvent for the particles at a second temperature, methods of imaging such a medium, and such an imaged medium. In one preferred embodiment, the receptor layer comprises a polymer of ethylene, n-butylacrylate, and methacrylic acid. In another preferred embodiment, the receptor layer comprises a blend of 60 to 90 percent by weight of a polymer comprising ethylene, n-butylacrylate, and methacrylic acid and about 10 to 40 percent by weight of a neutralized ethylene-methacrylic acid copolymer.
摘要:
Tamper-resistant inner seals that bond firmly to the lips of lidded and capped glass and plastic containers. The innerseals incorporate a metallic foil having a heat sealable adhesive applied to one surface thereof. The heat-sealable adhesive comprises a parafin wax or blend of paraffin wax and microcrystalline wax, polystyrene or derivative thereof, rosin or derivative thereof, and at least one high molecular weight polymeric material selected from the group consisting of ethylene/acrylic acid copolymers, ethylene/vinyl acetate copolymers, ethylene/methacrylate copolymers, and ethylene/vinyl acetate/methacrylic acid terpolymers, and blends thereof.
摘要:
An inner seal for containers that is capable of providing a visual indication of tampering. The innerseal comprises a membrane that it at least partially translucent, a layer of heat flowable material coated on one major surface of the translucent membrane, a rupturable, non-translucent membrane overlying the layer of heat flowable material, and an adhesive or heat-sealable composition overlying the surface of the rupturable membrane that is not in contact with the heat flowable material.
摘要:
An indicator is disclosed for providing an indication that a food item has attained a desired temperature. The indicator includes an organic retainer that maintains a plunger in a retracted position until the material from which the retainer is constructed yields. When the retainer yields, a spring urges the plunger toward an extended position to indicate that the food item has attained the desired temperature.
摘要:
Tamper-resistant inner seals that bond firmly to the lips of lidded and capped glass and plastic containers. The innerseals incorporate a metallic foil having a heat-sealable adhesive applied to one surface thereof. The heat-sealable adhesive comprises a paraffin wax or blend of paraffin wax and microcrystalline wax, polystyrene or derivative thereof, rosin or derivative thereof, and at least one high molecular weight polymeric material selected from the group consisting of ethylene/acrylic acid copolymers, ethylene/vinyl acetate copolymers, ethylene/methacrylate copolymers, and ethylene/vinyl acetate/methacrylic acid terpolymers, and blends thereof.
摘要:
A composition for preparing a printing ink. The composition comprises(a) a vehicle or binder, which comprises at least two resins which are compatible, one of which resins is a polyvinyl acetal or a dibasic acid-modified rosin ester,(b) a release agent,(c) a solvent for the vehicle and release agent, and(d) a colorant.The ink is particularly useful for printing on a substrate of polystryrene foam. The composition may be used without the colorant, in which case it can be used for providing a release coating on a substrate.
摘要:
A tamper indicating cover has at least a portion of the top being translucent or transparent and a seal adhered to the cover and container in such a manner that relative rotation between the cover and container ruptures the seal and provides a visible indication that the container has been opened.