Abstract: A ball bat includes a barrel portion and a tapered transition portion. An elastomeric coupler is positioned around a distal portion of a handle. A rigid sleeve is positioned around the elastomeric coupler and the handle is passed through the barrel and transition portion until the distal portion, elastomeric coupler, and rigid sleeve are positioned within the transition portion. The elastomeric coupler may be compressed by the rigid sleeve and may be stretched to be positioned around the distal portion. The distal portion may be flared. Adhesive may be used to secure the distal portion, elastomeric coupler, rigid sleeve, and transition portion to one another. Ridges on the elastomeric coupler may engage grooves in the rigid sleeve to resist rotation.

Abstract: Disclosed is a lightweight high-strength bat and a preparation method therefor, including a hollow fiber bat main body layer and a tough layer, where the epoxy structural adhesive film is prepared from the following raw materials in parts by weight: 45-65% of bisphenol A epoxy resin, 5-10% of p-aminophenol triglycidyl amine, 4-6% of dicyandiamide, 2-4% of an organic urea accelerator, 1-5% of a KH560 silane coupling agent, 5-10% of solid nitrile rubber, 7-15% of liquid carboxyl-terminated nitrile rubber, 7-15% of epoxidized polybutadiene liquid rubber, and 1-5% of 8-hydroxyquinoline. The high-strength fiber layer serves as a main body structure layer and is light, then the epoxy structural adhesive film is adopted to coat the main body layer of the fiber bat, an epoxy structural adhesive can permeate into the fiber layer, a bonding force between the layers is enhanced, and the strength of the bat is further improved.

Abstract: A ball bat includes a barrel portion and a tapered transition portion. An elastomeric coupler is positioned around a distal portion of a handle. A rigid sleeve is positioned around the elastomeric coupler and the handle is passed through the barrel and transition portion until the distal portion, elastomeric coupler, and rigid sleeve are positioned within the transition portion. The elastomeric coupler may be compressed by the rigid sleeve and may be stretched to be positioned around the distal portion. The distal portion may be flared. Adhesive may be used to secure the distal portion, elastomeric coupler, rigid sleeve, and transition portion to one another. Ridges on the elastomeric coupler may engage grooves in the rigid sleeve to resist rotation.