Customer Background

The customer is a South Korean agricultural materials company (Corporation) specializing in greenhouse film for facility horticulture, serving local fruit, vegetable, and flower growers. South Korea's facility horticulture focuses on high-value crops, with greenhouse films replaced annually; buyers have stricter requirements than standard agricultural films regarding light transmittance retention, anti-drip durability, and service life. The two parties have cooperated for many years, with orders fulfilled in batches according to the Korean growing season. The president (Park) has led delegations to our factory multiple times to inspect the blown-film workshop, raw material formulation, and packaging/shipping processes, and to verify specifications for each new season annually.

Order Specifications

This batch of specifications was defined by the customer's specification sheet: PO film High-Energy No. 1, thickness 0.1mm (10 mils), light transmittance >92%, elongation 1062%横向, 1647%纵向, anti-drip duration synchronized with service life, long-life version 3–5 years; width and length are determined per order based on the customer's greenhouse frame dimensions.

Key Points of the Solution

Achieving both >92% light transmittance and a 3–5 year service life at 0.1mm thickness presents challenges in additive formulation and co-extrusion layer sequence. Yongguan employs a multi-layer co-extrusion process for PO film, placing insulation, anti-drip, and anti-fog additives in separate layers to prevent interactions that could cause premature migration, ensuring anti-drip durability matches the film's service life rather than failing prematurely. Light transmittance is calibrated jointly based on resin grade and thickness, with each batch verified before shipment.

Delivery and Packaging

Packaging and shipment for this order batch were completed in October 2026. Rolls are individually wrapped in woven bags, stacked on wooden pallets, and secured with stretch wrap; hand-written width×thickness labels are marked on pallet sides, while batch numbers are spray-coded on the film surface, allowing customers upon arrival to directly sort into specifications and trace by batch using these identifiers and codes.

Outcomes

1. All four stringent criteria in the customer's specification sheet (thickness, light transmittance, anti-drip duration, service life) were fully met without any downgrading; 2. After years of continuous procurement, specifications have been adjusted annually to match greenhouse types and crops, with supply rhythms aligned to the Korean growing season; 3. Packaging follows a pallet-plus-handwritten-label approach, eliminating the need for secondary sorting upon arrival—ready for immediate warehousing and use.