Bulk Red and Green Tennis Balls Factory

The production line uses a two‑step molding process: first, a natural‑rubber compound is injection‑molded into a hollow core, then pressurized to 12 psi (±0.5 psi) to achieve the required rebound characteristics. After core curing, a blend of wool and nylon fibers is woven into a felt jacket, which is adhered using a water‑based adhesive that maintains flexibility under repeated impact.

Material Composition and Construction

The core consists of 92 % natural rubber, 5 % synthetic butadiene, and 3 % zinc oxide filler, providing a Shore A hardness of 45 ± 2. The felt jacket is 80 % wool and 20 % nylon, with a pile height of 2.0 mm and a tensile strength of at least 30 MPa. These proportions are calibrated to deliver a coefficient of restitution between 0.75 and 0.78 when dropped from 100 mm onto a steel plate.

Dimensional and Performance Specifications

Parameter	Typical Value	Tolerance / Note
Diameter	67 mm	±0.5 mm (ITF)
Weight	58 g	±0.5 g
Rebound Height	135 mm	Drop from 254 mm onto concrete
Felt Thickness	2.0 mm	Measured after adhesive cure
Core Pressure	12 psi	±0.5 psi at 20 °C
Color Options	Red (Pantone 186 C), Green (Pantone 347 C)	Custom Pantone matches available

Customization Options

• Adjust core pressure from 10 psi to 14 psi for slower or faster play characteristics.
• Modify felt blend ratio (wool/nylon) to alter durability versus feel.
• Apply UV‑stabilizing additives to the felt for outdoor court longevity.
• Select alternative Pantone colors or add a white logo imprint.
• Choose bulk packaging configurations: 24‑ball poly bags, 72‑ball cartons, or 144‑ball palletized crates.

Quality Control and Testing

Each batch undergoes three checkpoints: core pressure verification using a calibrated gauge, felt adhesion strength measured by a peel test (minimum 1.5 N/mm), and bounce consistency assessed with an automated drop tower (standard deviation ≤ 3 mm). Visual inspection ensures color uniformity and absence of surface defects before packaging.

Typical Industrial Applications

Red and green balls are frequently selected for training programs where color coding simplifies drill organization—red for forehand focus, green for backhand drills—reducing setup time and improving athlete feedback. In recreational facilities, the distinct colors aid visibility on multi‑surface courts, decreasing ball loss and improving turnover rates. Specialized venues such as adaptive sports programs use the colors to assist players with visual impairments, leveraging high‑contrast hues against standard court backgrounds.

Packaging and Logistics

• Inner lining: low‑density polyethylene bags prevent moisture ingress during transit.
• Outer cartons: double‑wall corrugated fiberboard with 200 psi burst strength, printed with handling instructions.
• Palletization: standard 48×40 in. pallets, stretch‑wrapped, capable of 2 ton load.
• Export compliance: ISPM‑15 treated wood pallets, fumigation certificates available upon request.
• Lead time: 2‑4 weeks for standard orders, 6‑8 weeks for custom pressure or color specifications.

Frequently Asked Questions

Can the ball dimensions be customized? Yes, diameter can be adjusted within ITF tolerances (65‑73 mm) by altering core mold size; please provide target specifications for quotation.

What information is required before quotation? Required details include desired quantity, core pressure, felt blend, color Pantone numbers, packaging preference, and delivery destination.

How is quality inspected? Each lot is sampled per ISO 2859‑1 AQL 1.0 for visual defects, pressure, and bounce; full test reports are available on request.

What packaging methods are available? Standard options are poly bags, cardboard cartons, and palletized crates; custom labeling or barcoding can be added.

How are export shipments protected? Shipments include moisture‑barrier bags, corner protectors, and comply with ISPM‑15 pallet regulations to prevent customs delays.