[Problem] To provide a composite preform that can ensure that worsening of the appearance of a surface of a plastic member caused by near-infrared heating prior to blow molding is effectively prevented and that an inner preform is efficiently heated. [Solution] The composite preform of the present invention includes a preform and a heat-contractive plastic member, the preform including a mouth part; a trunk part linked to the mouth part; and a bottom part linked to the trunk part, and the heat-contractive plastic member being disposed so as to surround the outside of the preform and including at least a colored layer that contains a resin material and a colorant, wherein the heat-contractive plastic member has a near-infrared transmittance of 50% or higher.

[Problem] To provide a composite preform that can ensure that worsening of the appearance of a surface of a plastic member caused by near-infrared heating prior to blow molding is effectively prevented and that an inner preform is efficiently heated. [Solution] The composite preform of the present invention includes a preform and a heat-contractive plastic member, the preform including a mouth part; a trunk part linked to the mouth part; and a bottom part linked to the trunk part, and the heat-contractive plastic member being disposed so as to surround the outside of the preform and including at least a colored layer that contains a resin material and a colorant, wherein the heat-contractive plastic member has a near-infrared transmittance of 50% or higher.

Embodiments described herein relate to articles and methods for forming liquid surface films on the interior surfaces of containers for holding one or more products comprising one or more Bingham plastic materials. Bingham plastic materials behave as a solid under no or low shear stress, and behave as viscous liquids when an applied shear stress exceeds a yield stress. In some embodiments, a container for containing a product includes an interior surface and a liquid disposed on the interior surface. Before introduction of a product into a container, the liquid may be surrounded by air. The liquid-air interface in contact with the interior surface makes a contact angle, θ.sub.os(a), with respect to the interior surface of the container, of about 0°. After a product has been introduced to the container, the liquid is at least partially covered by the product. The liquid-product interface in contact with the interior surface, makes a contact angle, θ.sub.os(p), with respect to the interior surface, of less about 60°. The subscript “o” denotes the liquid, subscript “s” denotes the interior surface, subscript “a” denotes air, and subscript “p” denotes a product. In some embodiments, the contact angle θ.sub.os(p) can be less than about 50°, less than about 40°, or less than about 30°.

Embodiments described herein relate to articles and methods for forming liquid surface films on the interior surfaces of containers for holding one or more products comprising one or more Bingham plastic materials. Bingham plastic materials behave as a solid under no or low shear stress, and behave as viscous liquids when an applied shear stress exceeds a yield stress. In some embodiments, a container for containing a product includes an interior surface and a liquid disposed on the interior surface. Before introduction of a product into a container, the liquid may be surrounded by air. The liquid-air interface in contact with the interior surface makes a contact angle, θ.sub.os(a), with respect to the interior surface of the container, of about 0°. After a product has been introduced to the container, the liquid is at least partially covered by the product. The liquid-product interface in contact with the interior surface, makes a contact angle, θ.sub.os(p), with respect to the interior surface, of less about 60°. The subscript “o” denotes the liquid, subscript “s” denotes the interior surface, subscript “a” denotes air, and subscript “p” denotes a product. In some embodiments, the contact angle θ.sub.os(p) can be less than about 50°, less than about 40°, or less than about 30°.

A package including a container body containing a fluid with leaving a head space, wherein a container body (1) has an inner surface coated with a lubricating liquid (30) immiscible with a fluid (3), and the lubricating liquid (30) is present as a coating layer interposed between the inner surface and the fluid (3), the lubricating liquid (30) forms a liquid pool at a periphery of an upper end face of the fluid (3) contained in the container body (1) in a state of being held upright, and a contact angle of the lubricating liquid (30) to the inner surface is smaller than the contact angle of the fluid (3) to the inner surface.

A package including a container body containing a fluid with leaving a head space, wherein a container body (1) has an inner surface coated with a lubricating liquid (30) immiscible with a fluid (3), and the lubricating liquid (30) is present as a coating layer interposed between the inner surface and the fluid (3), the lubricating liquid (30) forms a liquid pool at a periphery of an upper end face of the fluid (3) contained in the container body (1) in a state of being held upright, and a contact angle of the lubricating liquid (30) to the inner surface is smaller than the contact angle of the fluid (3) to the inner surface.

Polymeric polyoxazolines of the following structure are disclosed:

##STR00001##

where X is the residue of a polymeric polyol after reaction with a dicarboxylic acid/anhydride; where R.sub.5 is an organic moiety; where Y is an organic moiety containing one or more oxazoline groups; and wherein each R.sub.10 is independently hydrogen or an organic moiety. Methods of making such polyoxazolines and using them in a coating, and packages coated therewith, are also within the scope of the present invention.

Polymeric polyoxazolines of the following structure are disclosed:

##STR00001##

where X is the residue of a polymeric polyol after reaction with a dicarboxylic acid/anhydride; where R.sub.5 is an organic moiety; where Y is an organic moiety containing one or more oxazoline groups; and wherein each R.sub.10 is independently hydrogen or an organic moiety. Methods of making such polyoxazolines and using them in a coating, and packages coated therewith, are also within the scope of the present invention.

A method of reducing static charge of a plastic container is provided. The method includes providing a PECVD coating of SiCOH, SiO.sub.x or SiOH to an external support surface of the container. The PECVD coating reduces static charge of the container compared to a reference container that is essentially identical to the container except that the reference container is uncoated.

A method of reducing static charge of a plastic container is provided. The method includes providing a PECVD coating of SiCOH, SiO.sub.x or SiOH to an external support surface of the container. The PECVD coating reduces static charge of the container compared to a reference container that is essentially identical to the container except that the reference container is uncoated.