COEX blow-molded bottle

COEX blow-molded bottle for high-barrier pesticide use

COEX co‑extruded blow‑molded high‑barrier pesticide bottles use chemically resistant engineering plastics (e.g., PET, PE) for the outer and inner layers as structural and sealing layers, balancing mechanical strength and processing performance.

Description

The COEX co‑extruded blow‑molded high‑barrier pesticide bottle is manufactured by a multilayer co‑extrusion process. Barrier materials such as EVOH or PA can be embedded as an intermediate layer in the multilayer structure to effectively reduce gas and organic solvent permeation and volatilization, thereby extending the stability and shelf life of pesticide formulations.

Core selling points of the COEX co‑extruded blow‑molded high‑barrier pesticide bottle:

  1. High barrier: The intermediate barrier layer (e.g., EVOH) significantly reduces O2 and volatile organic compound (VOC) permeation, minimizing loss of active ingredients.
  2. Multilayer co‑extrusion: The COEX process enables controllable 3 to 7 layer structures with stable interlayer adhesion, impact resistance, and crack resistance.
  3. Chemical resistance and compatibility: Inner layer materials can be selected according to the pesticide formulation (PE, HDPE, PP, etc.) to reduce compatibility risks.
  4. Customizable: Capacity, neck specifications (diameter, thread), color, handles, printing, and labeling can all be customized per customer requirements.
  5. Environmental friendliness and traceability: Supports the use of recycled materials (subject to formulation constraints) and batch tracking; raw material declarations and test reports are provided.

Suggested technical parameters for the COEX co‑extruded blow‑molded high‑barrier pesticide bottle:

  1. Layer count: 3 to 7 layers (example structure: outer PET / middle EVOH / cushion layer LDPE / inner PE)
  2. Example barrier material and thickness: EVOH 3 µm to 15 µm (adjusted according to target O2TR)
  3. Recommended performance indicators (example): O2 transmission rate (OTR) ≤ 0.5 cc/m2·day (stricter targets can be set per customer requirements)
  4. Temperature tolerance range (reference): -20°C to +60°C (depends on materials and formulation)
  5. Typical capacities: 50 mL to 5 L (customizable)
  6. Surface treatments: Shrink sleeves, aluminum foil seals, silk‑screen printing, or thermal transfer printing available

Applicable scenarios:

  1. Packaging for liquid or emulsified pesticides, herbicides, insecticides, and other formulations requiring long‑term stability;
  2. Packaging needs that require maintaining formulation stability during long‑distance transport or in high‑temperature environments;
  3. High‑activity formulations that are sensitive to volatilization losses or gas permeation.