Production line and factory setup overview
A medium/large three-layer blown-film line producing UV-stabilized PE greenhouse covering through recipe-controlled LDPE/LLDPE/EVA and additive dosing, three-extruder coextrusion, annular die forming, internal/external bubble cooling, thickness and bubble control, tower haul-off and collapsing, edge/layflat control, tension winding, roll conditioning and optical, mechanical, thermal and accelerated-weathering tests.
Recommended lowest-entry line configuration Launch one 6-8 m opened-width, three-layer UV greenhouse film at 120-220 kg/h only after provincial wind, temperature, crop and service-life requirements are fixed. Include gravimetric dosing, three extruders, die and air ring, stable tower, thickness control, gusset/layflat system, surface winder and a polymer/optical weathering laboratory. A packaging-film machine does not by itself prove agronomic film life.
Production process and implementation sequence
- Climate and film specification
- Resin/additive lot release and dosing
- Three-layer melt coextrusion
- Die, bubble and cooling control
- Tower haul-off and collapsing
- Layflat, gusset and edge control
- Tension winding and conditioning
- Optical, mechanical and weathering release
Products, capacity and market fit
- Protected cultivation needs durable climate-appropriate covering.
- Local wide rolls can support greenhouse kit suppliers.
- Three layers place UV, anti-drip or thermal functions where required.
- Film lifetime claims require recipe control and accelerated weathering plus field trials.
- Three-layer UV greenhouse film - Opened width, thickness, layer recipe, UV life claim, light transmission/diffusion, thermal/anti-drip option and roll length - Greenhouse builders and growers
- Validated tunnel-cover film - Separate thickness, width, puncture and installation specification - Season-extension tunnels after field trial
Core production machinery and line specifications
| Machine / stage | Function / value | Production note |
|---|---|---|
| Gravimetric multi-material dosing | Controls three-layer recipe | Traceable additives |
| Three extruders and annular die | Builds functional coextruded film | 120-220 kg/h |
| Air ring and bubble-control system | Stabilizes cooling and thickness | Wide-film duty |
| Tower, collapsing and layflat system | Produces 6-8 m opened width | Engineered height |
| Tension surface winder | Builds saleable wide rolls | Roll handling included |
| Film/weathering laboratory | Validates optics, strength and life basis | Named methods |
Raw materials, utilities and factory requirements
- Virgin LDPE/LLDPE/EVA grades by layer
- UV stabilizer, anti-drip, IR/thermal and light-diffusion additives only to validated recipe
- Clean documented edge recycle within approved layer limits
- Wide cores, wraps, labels and roll-protection materials
- Stable three-phase electricity with verified connected load
- Closed-loop cooling water with chiller or cooling tower
- Dry covered resin/additive storage and segregated finished goods
- Ventilation, fire protection, safe lifting and guarded machinery
- Tall engineered building/tower, controlled air and safe wide-roll lifting
Indicative low-entry investment and implementation plan
These planning ranges prioritize economical machinery, local labor and local civil works. Final pricing follows confirmed capacity, product specification, delivery terms and site conditions.
| Scope | Indicative range | Entry-plan note |
|---|---|---|
| Three extruders, dosing, die and air ring | US$145k-330k | Wide three-layer basis |
| Tower, thickness control and winding | US$90k-240k | 6-8 m opened width |
| Laboratory and roll handling | US$35k-95k | Agricultural-film release |
| Freight, erection, utilities and spares | US$70k-190k | Tall structure |
| Indicative installed project total | US$340k-855k | Building, resin and field trials excluded |
Detailed proposal and next step
The proposal contains the complete line flow, machinery scope, raw-material and utility requirements, implementation stages and indicative entry planning. Final configuration follows confirmed products, capacity, site and budget.