Find HS Code and trade information for rebound

Rebound

Definition: A rebound is the return of an object after it has been deflected, most commonly a ball after hitting a surface, or a person's emotional recovery from a difficult experience. This entry focuses primarily on the sporting and physics-based definition.

Material:

The material properties of both the rebounding object and the surface it impacts are critical.

• Rebounding Object: Typically made of materials with high elasticity. Common materials include:
  • Rubber: Found in basketballs, volleyballs, and many other sports balls. Synthetic rubbers are frequently used for enhanced performance.
  • Leather: Used in basketballs (often combined with rubber bladders), providing grip and durability.
  • Plastic: Used in some balls, offering varying degrees of bounce depending on the specific polymer.
  • Foam: Used in softer balls for safety or specific training purposes.
• Impact Surface: Materials range widely, impacting the degree and predictability of the rebound:
  • Wood: Common in basketball courts, providing a relatively consistent bounce.
  • Concrete/Asphalt: Hard surfaces resulting in high, unpredictable rebounds.
  • Grass/Dirt: Softer surfaces absorbing more energy, leading to lower, less predictable rebounds.
  • Synthetic Surfaces: Engineered for specific bounce characteristics, often used in indoor sports facilities.

Purpose:

The purpose of a rebound varies by context:

• Sports: In sports like basketball, volleyball, and tennis, rebounds are fundamental to gameplay, allowing for continued possession, offensive opportunities, and defensive plays.
• Physics/Engineering: Rebound is studied to understand the principles of elasticity, energy transfer, and collision dynamics. It is utilized in the design of shock absorbers, impact-resistant materials, and other technologies.
• General Usage: The term can refer to the recovery from a setback, such as a personal relationship or a financial loss.

Function:

The function of a rebound relies on the principle of elasticity. When an object strikes a surface, the kinetic energy of the object is converted into potential energy as the object deforms upon impact. This potential energy is then released as the object returns to its original shape, converting back into kinetic energy and resulting in the rebound.

Factors influencing the function:

• Coefficient of Restitution: A value representing the ratio of the final velocity to the initial velocity after a collision. A higher coefficient indicates a more elastic collision and a greater rebound.
• Angle of Incidence: The angle at which the object strikes the surface. This affects the direction of the rebound.
• Velocity of Impact: Higher impact velocities generally result in greater rebound distances, up to a certain point where energy loss becomes significant.
• Spin: Spin can affect the angle and trajectory of the rebound.

Usage Scenarios:

• Basketball: Players attempt to rebound missed shots to gain possession of the ball. Offensive rebounds provide second-chance scoring opportunities, while defensive rebounds prevent the opposing team from scoring.
• Tennis: Rebounds are essential for rallying and returning serves. Players utilize different techniques to control the angle and speed of the rebound.
• Volleyball: Players rebound spikes and blocks to keep the ball in play and set up offensive attacks.
• Shock Absorbers: Used in vehicles and other machinery to absorb impact energy and provide a smoother ride.
• Testing Material Resilience: Rebound tests are used to assess the elasticity and durability of various materials.
• Personal Recovery: Describes the process of emotional healing after a difficult experience.

Common Types (in the context of sports balls):

• High Bounce Balls: Typically made of rubber with a high coefficient of restitution, designed for maximum rebound. (e.g., basketballs, volleyballs)
• Low Bounce Balls: Made of softer materials with a lower coefficient of restitution, used for training or games where a slower pace is desired. (e.g., some playground balls)
• Foam Balls: Offer very low rebound and are used for safety or specific training exercises.
• Specialty Balls: Designed with specific surface textures or internal constructions to alter the rebound characteristics. (e.g., textured tennis balls for increased spin)

Based on the provided reference material, the HS code options related to 'rebound' are limited, with only the following 3 found.

• 4001290000: Natural rubber, balata, gutta-percha, guayule, chicle and similar natural gums, in primary forms or in plates, sheets or strip: Natural rubber in other forms: Other.

  • 40: Rubber and articles thereof.
  • 01: Natural rubber, balata, gutta-percha, guayule, chicle and similar natural gums.
  • 29: Natural rubber in other forms.
  • This HS code covers natural rubber that is not in primary forms or plates/sheets/strips, and is categorized as 'other'.

• 4002800000: Mixtures of any product of heading 4001 with any product of this heading.

  • 40: Rubber and articles thereof.
  • 02: Synthetic rubber, in primary forms or in plates, sheets or strip.
  • 80: Mixtures of any product of heading 4001 with any product of this heading.
  • This HS code applies to mixtures containing products from heading 4001 (natural rubber) and products from this heading (synthetic rubber).

• 4002990000: Other: Other.

  • 40: Rubber and articles thereof.
  • 02: Synthetic rubber, in primary forms or in plates, sheets or strip.
  • 99: Other.
  • This HS code is a general category for 'other' rubber products not specifically classified elsewhere within heading 4002.

Regarding HS codes 4001290000, 4002800000 and 4002990000, please note that a 25.0%加征关税 applies, increasing to 30.0% after 2025.4.2. The total tax rate for these HS codes is 55.0%.