A kit for preparing a cured article may include first and second casting compositions configured to form a curable composition, and an additive delivery composition for introducing an additive into the curable composition. The additive delivery composition includes a liquid carrier and at least one additive. The liquid carrier may include one or more of polyvinyl acetate, polyvinyl alcohol, or polyacrylate. A mold assembly for preparing a cured article may include a first mold body defining a first mold chamber and a groove surrounding the first mold chamber. The mold assembly further includes a second mold body defining a second mold chamber and a tongue surrounding the second mold chamber. The tongue is receivable into the groove to secure the first and second mold bodies. The first and second mold chambers together define a mold volume configured to receive and shape the curable composition.

A construction toy is provided, with illustrated panels that connect together magnetically to assemble two- and three-dimensional structures and background scenery, optionally with accessory items that bind magnetically or mechanically to the panels to embellish the structures or scenes that are created.

A plastic article is recited having a plastic shell including walls defining a cavity. Within the cavity is an in-situ foam core including expanded polymer beads. A layer of the expanded polymer beads includes a layer of distorted beads adjacent to the walls. The in-situ foam core has a thermal bond to the walls.

Described herein is a mold for making units of a dome structure, comprising: a first mold piece, a second mold piece, a third mold piece; the third mold piece is configured to be sandwiched between and assembled with the first and second mold pieces; wherein an assembly of the first mold piece, the second mold piece, and the third mold piece is configured to form a mold cavity; wherein the third mold piece comprises a plurality of sidewall plates; wherein the plurality of sidewall plates are perpendicular to a same spherical surface when the third mold piece is assembled with the first and second mold pieces. Described herein is also a method of using the mold, and the method comprises: assembling the plurality of sidewall plates to form the third mold piece; assembling the second mold piece and the third mold piece; assembling the first mold piece with the second mold piece and the third mold piece to form the mold cavity of a first-level mold; injecting a molding material into the mold cavity; forming a unit of a first-level dome structure by allowing the molding material to form into shape; opening the first-level mold; extracting the unit of the first-level dome structure.

A play ball has a rubber shell filled with resilient foam having an entire outer peripheral surface thereof intimately attached by heat fusion and adhesive to an entire interior surface of the shell. Such attachment enables the foam to provide additional resiliency by foam tension, as well as by foam compression, thereby significantly extending the effective bounce life of the ball. A seamed dog chew toy has essentially similar construction such that the increased retention force provided by the intimate attachment of the foam to the shell resists the chewing force of the dog popping a seam improving durability.

A hollow thermoplastic toy for use in a child's bath, having a vent hole, is provided with a transparent region and an opaque region. The transparent region serves as a window into the interior, permitting visual detection of the growth of mold or mildew within the toy. This represents an improvement over prior art toys of completely opaque construction, within which mold and mildew can grow unseen and unchecked. The toys of the invention facilitate timely cleaning of the toys' interior surfaces.

Disclosed are a food grade starch based modeling clay with high elasticity and high ductility and its preparation method, belonging to the technical field of modeling clay preparation. The starch based modeling clay provided by the present disclosure is prepared from the following formula components: 160-180 parts of starch, 140-160 parts of water, 10-15 parts of a food grade stabilizer, 10-15 parts of edible salt, 0-10 parts of hydrophilic colloid, 0.6-0.8 parts of a preservative, 40-60 parts of a food grade plasticizer, 6-10 parts of food grade white oil, and 4-8 parts of edible pigment. The starch includes one or a combination of more of cassava starch, wheat starch, and glutinous rice starch. The present disclosure, through combined use of the starch and the hydrophilic colloid, makes the prepared starch based modeling clay have good viscoelasticity and ductility, and good in storage stability, safe and non-toxic.

A composition comprising a high molecular weight, chromium catalyzed ethylene copolymer (also referred to as a polyethylene resin), a nucleating agent and zinc oxide.

In some embodiments, a toy is disclosed. In some embodiments, the toy includes an expanded thermoplastic polyurethane (ETPU) outer shell portion and a core portion formed of a material with a higher density than the ETPU forming the outer shell portion. In some embodiments, a mold for forming a toy with an ETPU outer shell portion and with a core portion formed of a different material is disclosed. In some embodiments, a method of forming a toy with an ETPU outer shell portion and core portion formed of a different material is disclosed.

Disclosed are a food grade starch based modeling clay with high elasticity and high ductility and its preparation method, belonging to the technical field of modeling clay preparation. The starch based modeling clay provided by the present disclosure is prepared from the following formula components: 160-180 parts of starch, 140-160 parts of water, 10-15 parts of a food grade stabilizer, 10-15 parts of edible salt, 0-10 parts of hydrophilic colloid, 0.6-0.8 parts of a preservative, 40-60 parts of a food grade plasticizer, 6-10 parts of food grade white oil, and 4-8 parts of edible pigment. The starch includes one or a combination of more of cassava starch, wheat starch, and glutinous rice starch. The present disclosure, through combined use of the starch and the hydrophilic colloid, makes the prepared starch based modeling clay have good viscoelasticity and ductility, and good in storage stability, safe and non-toxic.