A method for preparing a superabsorbent polymer, and more particularly, a method for preparing a superabsorbent polymer in which it is possible to stably operate a process for preparing a fine powder reassembly while maintaining assembly strength of the fine powder reassembly, wherein a refined ratio is reducible, and an initial absorption speed of the superabsorbent polymer is improved, by adjusting a stirring speed and divisionally adding water to a fine powder in a process for the preparation of the fine powder reassembly, is provided.

Methods of recovering and/or recycling expanded polymer tooling, the methods including collecting expanded polymer tooling, reducing the collected expanded polymer tooling into smaller particles, treating the reduced expanded polymer tooling in order to yield an at least partially purified recovered polymer composition, and then collecting the at least partially purified recovered polymer composition. The at least partially purified recovered polymer composition can then be used to form new expandable polymer tooling.

The present invention relates to an equipment and method for producing polymer pellets which comprise one or more polymer components and one or more further components, wherein in said process at least one of said one or more further components is incorporated into pellets by applying a liquid, which comprises said at least one component, onto said pellets.

Ethylene-vinyl alcohol copolymer composition pellets comprise: an ethylene-vinyl alcohol copolymer, a conjugated polyene, and a predetermined amount of at least one fisheye-suppressing component; wherein pellet surface portions of the ethylene-vinyl alcohol copolymer composition pellets have a conjugated polyene content of not lower than 30 ppb based on the weight of the pellets. Such ethylene-vinyl alcohol copolymer composition pellets are capable of reliably suppressing occurrence of minute fisheyes having a diameter of 200 μm or smaller.

A method for impregnating a polymeric granulate with a physical blowing agent is disclosed. The polymeric granulate can be a typical material such as a polycarbonate that is used in foam injection moulding processes. The physical blowing agent can be carbon dioxide which impregnates that polymeric granulate at a temperature range of 40 to 120 C. and a pressure range of 15 to 55 bar. Preferably, the polymeric granulate is heated in a range of 50 to 90 with a range of 60 to 80 preferred. A pressure range of 0 25 to 45 bar is preferred with a range of 30 to 40 bar more preferred.

The present invention relates to an equipment and method for producing polymer pellets which comprise one or more polymer components and one or more further components, wherein in said process at least one of said one or more further components is incorporated into pellets by applying a liquid, which comprises said at least one component, onto said pellets.

A method of forming particles for controlled guest agent release includes coextruding first and second polymer materials to form a multilayer polymer composite sheet comprising alternating first and second polymer layers, dividing the multilayer sheet into particles, immersing the particles in a solvent containing the guest agent such that the first layers swell and the guest agent is loaded into the swollen first layers.

The invention provides novel pellets having high fluidity in a hopper of an extruder and capable of forming a coating layer having good wire diameter stability and capacitance stability even when used for rapid molding of electric wire coating. The pellets contain a fluororesin. Each of the pellets, placed on a horizontal surface, has a substantially circular outline or a substantially elliptic outline and has a major axis D.sub.1 of 3.1 mm or shorter and a minor axis D.sub.2 of 3.1 mm or shorter when observed in the direction normal to the horizontal surface. Each pellet satisfies the following formula (1): (D.sub.1+D.sub.2)/2L=1.8 to 2.6, wherein D.sub.1 represents the major axis, D.sub.2 represents the minor axis, and L represents the height from the horizontal surface to the highest point of the pellet.

The present invention relates to an equipment and method for producing polymer pellets which comprise one or more polymer components and one or more further components, wherein in said process at least one of said one or more further components is incorporated into pellets by applying a liquid, which comprises said at least one component, onto said pellets.

Provided is an EVOH resin pellet which is capable of reducing the occurrence of fish eyes in a melt molded article of an EVOH resin. The occurrence of fish eyes in a melt molded article such as a film that is produced by melt molding using pellets is able to be suppressed by setting the abundance of a conjugated polyene in a surface portion of the pellet to an intended amount or more.