Shredding and Recycling of Agricultural Films

Robust Shredders for Farm Plastics like Silage Wraps, Greenhouse Films & More
Field film for the agricultural business
Agricultural film on the shredder conveyor belt
Shredded crop plastics
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The use of agricultural films has been increasing for decades and the market continues to grow. The reasons for this are the increasing demand for food and animal feed, decreasing acreage, soil protection and the cost efficiency of agricultural films. As there are currently hardly any alternatives, consumption is leading to more and more film waste. Only efficient film recycling offers a sustainable solution. Shredding to a homogeneous grain size is essential for this - the first step in the recycling process.
WEIMA shredders are specially designed for the material processing of post-consumer agricultural film and are based on decades of experience in plastics recycling in the agricultural sector.

Customer applications: Agricultural film shredding with WEIMA

Practical examples of successful shredding with WEIMA shredders
View into the cutting room of a WEIMA plastic shredder that shreds transparent LDPE film with a rotor
Agricultural film shredding
LDPE film recycling with a WEIMA shredder and NGR extruder at RKW in Hoogstraten, Belgium
A WEIMA W5.18 single-shaft shredder shreds LDPE film at RKW in Hoogstraten. After shredding, the material is further processed into granules with an F:Gran extruder from NGR.
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Agricultural film on the shredder conveyor belt
Agricultural film shredding
WEIMA PreCut 3000 | Agricultural film recycling
WEIMA PreCut 3000 shreds highly contaminated LDPE stretch film with up to 20-25% degree of contamination.
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CEO Recycling shredder for agriculture film
Agricultural film shredding
Shredding dirty agricultural stretch film (LLDPE) with a WEIMA PreCut 3000 shredder
A WEIMA PreCut 3000 single-shaft shredder with hydraulic drive shreds post-agricultural stretch film (LLDPE) for further recycling processing.
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Agricultural film shredding
Recycling agricultural film at Plastika Kritis
A WEIMA shredder shreds old agricultural film for further recycling.
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Portrait of Erik Hagen, Sales Director at WEIMA
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WEIMA portfolio for shredding agriculture film

The right machine for every material
Single-shaft shredder
W5 series
With rotor lengths of 1,400 to 2,200 mm, the shredders in the W5 series shred large-volume plastic tanks and plastic garbage cans with ease. The hydraulically upward pivoting screen basket and the inspection flap allow foreign objects to be removed quickly and facilitate maintenance. Large quantities of plastic flakes can be removed via the wide conveyor belt cut-out.
To the machine
Single-shaft shredder
W8 PowerLine series
The machines in the PowerLine series can be used universally. Variable equipment and sizes enable precise adaptation to your specific requirements. The counter knives are user-friendly and can be adjusted from the outside and are protected by an additional cover plate.
To the machine
Single-shaft shredder
W8 PreCut series
The PreCut series is characterized by extremely high throughput rates. PreCut machines are often used as pre-shredders in multi-stage processing systems, but are also suitable as a stand-alone solution. The solid PreCut rotor is particularly resistant to foreign matter thanks to Vautid wear protection. Reinforced side walls make the frame of the shredder extremely solid.
To the machine
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Heavy duty machine design

WEIMA shredders for highly abrasive materials can be equipped with numerous options to protect against wear – for less downtime and lower maintenance costs. The solid machine frame ensures particular robustness. Rotors can be reinforced with Vautid and screens with Creusabro. Optionally, large knives (up to 130 x 130 mm) protect against foreign bodies, Vautid can also secure knife carriers.
To protect the rotor face plates, we recommend replaceable Creusabro wear plates that can be fitted on both sides. The cutting chamber can also be optionally reinforced with replaceable Creusabro plates. For particularly heavy-duty applications, we offer an approx. 20 mm thick, wear-resistant Creusabro screen.

Vautid jacket on a rotor

WEIMA rotor with Vautid protection

Vautid weld on for shredder rotor

Vautid weld-on for shredder rotor

Concha Vautid no rotor PowerLine

Proteção contra o desgaste do rotor Vautid

Casco do rotor Vautid

Revestimento de rotor Vautid

ANteção antidesgaste com revestimento de tinta

WEIMA WKS rotor concha vácuo

Proteção contra o desgaste do revestimento do rotor

Revestimento Vautid para pré-triturador

This is what makes film shredding so challenging:
Only half of the material delivered is actually film. Contaminants such as soil, stones, sand and feed residues account for over 45 percent.

Source: Bauernblatt

Developed for flat materials such as films: The F-Rotor

The optimum coordination of rotor, knives and counter knives is crucial for the shredding result. The selection of the components suitable for the material requires a high degree of experience. The F-rotor, specially designed for films, is characterized by its controlled feeding behavior.

By the way: For particularly abrasive or dirty materials, we recommend wear protection made of Vautid.

Specially designed WEIMA F-rotor for film

WEIMA F-rotor

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Recycling agricultural films, silage films or stretch films

The most important facts at a glance
Greenhouse film covers many fields in Southern Europe
Why are agricultural films used?
Agriculture films have significant advantages. Films for agricultural use create the ideal conditions for microclimate. Plant growth can thus be considerably increased. They reduce the need for chemical fertilizers, pesticides and herbicides. This leads to higher plant productivity through higher yields. In addition, weeds, insects and diseases can be controlled in a targeted manner.
Feed silage is stored in bunker silo
Films for forage preservation and early harvesting
Crop plastics are used in many different forms and with various characteristics. Agricultural film is used first and foremost in early harvesting. These include greenhouse films, peat films, perforated films, mulch films, asparagus films and geomembranes. Round bale films, stretch films, underlayer films, sidewall films and silage films are used for feed preservation in silage bales or bunker silos.
A mountain of white or transparent LDPE film
What material are agricultural films made of?
Agricultural films can be manufactured from various thermoplastics. Depending on the material requirements, the composition can be made from different masterbatches and compounds. In addition, additives such as UV absorbers or UV stabilizers can be added to further optimize product properties.

  • PE (Polyethylen)
  • HDPE (High-density Polyethylen)
  • LDPE (Low-density Polyethylen)
  • LLDPE (Linear low-density Polyethylen)
Highly contaminated agrifilm
Baled agricultural film before shredding and recycling
Contaminated agricultural film, bale nets and baler twine
Challenges in agriculture film recycling
Comparatively high quantities of plastic waste are generated, especially during harvesting periods. Films, usually delivered in bales, are often a diverse mixture of different polymers. These have to be separated into their various fractions. In addition, the used films are usually still very damp to wet and heavily contaminated, for example with soil, stones and metals. Transport in bale form makes it difficult to determine the degree of contamination. Organic matter that sticks to the film after silage or harvesting is often already rotten. This also impairs processing.

Source: Recyclingportal
How the shredding of harvesting plastics works
Agricultural, stretch and greenhouse films are often heavily contaminated after use in the fields - with soil, sand, feed residues, but also metal parts and stones. These contaminants pose a particular challenge for the first stage of recycling: shredding. WEIMA shredders are specially designed for these requirements. Thanks to their robust design and large feed hopper, even voluminous or heavily contaminated film bales can be processed without manual preparation. In combination with metal separation and other separation systems, the films are reliably shredded to 60-80 mm - the ideal size for downstream processes such as washing, drying and extrusion.
Hay bales are stored on the field in pink wrapping stretch film
Recycling instead of incineration: sustainable utilization of agricultural film
Thousands of tons of agricultural film are produced in Germany every year. Instead of incinerating or landfilling them, the ERDE initiative enables sustainable recovery and recycling. Farmers, contractors and manufacturers work together to create a closed recycling loop. The prerequisite for handing in the films at over 1,000 collection points is that they are roughly cleaned and sorted. Despite low cost participation, farmers save up to 50% compared to conventional disposal.
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Plasticulture: challenge and opportunity

With the increasing modernization of agriculture, the use of plastics such as agricultural, stretch and greenhouse films is on the rise – a trend known as plasticulture. This increases yields, but also leads to more and more film waste.

Thanks to modern shredding technology, for example from WEIMA, used crop plastics can be recycled efficiently. New agricultural and construction films as well as products such as fences, hoses or bin liners are created from the recycled pellets – in line with the circular economy.

This closes the film cycle, saves oil and protects the environment – to the benefit of agriculture and nature.

Field with rows of agri-film

Agriculture film in use on field

WEIMA also shreds agricultural nonwovens

In addition to agriculture film, agricultural non-woven fabric is also frequently used on farms to ensure a good harvest even under extreme weather conditions. Early weeding nonwoven, weed nonwoven and frost protection nonwoven are made of high-quality polypropylene (PP) yarn and can usually be used for several years.

After that, they are recyclable, just like film, and are first shredded with the help of WEIMA shredders.

Agriculture Nonwoven fabrics

Post-consumer agricultural nonwovens

Agricultural nonwovens after shredding

Shredded agricultural nonwovens

Free material tests in the WEIMA technical center
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Practical examples and references | Agricultural film recycling with WEIMA

WEIMA shredders are synonymous with efficient plastics recycling worldwide including at
Plastika Kritis
CEDO Recycling