Frequently Asked Questions (FAQs)

Find quick and easy answers to frequently asked questions regarding materials and solutions.
If you don’t find the answer you’re looking for, don’t hesitate to contact us.

We’re always here to help!

Industrial Packaging Solutions


Criteria for Selecting Stretch Film

When selecting stretch film, it is common for many Procurement Managers to focus more on the cost per roll rather than on quality. However, such a mindset is flawed, as such a decision can lead to unforeseen waste and damage to the loads. Loads require appropriate packaging not only for their safe and efficient transport but also for their subsequent delivery and invoicing. A defective load with signs of potential damage and slight displacement will not be accepted, resulting in non-billing.

Types of products secured during palletization. Some products require air circulation during transport to prevent overheating. Therefore, in some cases, the use of perforated stretch film is advisable, which will ensure delivery without damage to the goods.

Characteristics of the load (shape, weight, type, product dimensions). Stretch film selection should be based on the specific requirements of each pallet load. These specifications are called pallet profiles and require the use of stretch film that provides adequate retention based on the placement, weight, and type of packaged products. Apart from tensile strength, there are other factors to consider when choosing the right stretch film, such as different loads requiring different levels of stretch threshold.

Method of pallet wrapping (manual or automatic machine). When production needs require the use of a machine due to packaging at a fixed point or high production rates, it is common to achieve greater cost-effectiveness and strapping stability. Hand films are usually used in small productions or when there are multiple packaging stations in one area, and it is not practical to move towards the area where a machine would be based.

Load weight (light or heavy – over 1000 kilograms). Stretch film is measured in terms of thickness in microns, and usually, the thicker it is, the thicker and more resistant the film is, and the more reliable the load can be. Many believe that they can save money by choosing a thinner stretch film, so they often need to increase the number of rotations that wrap the load. This not only leads to increased cost per load but also increases the wear and tear of the machine, slowing down the production line. Therefore, it is recommended to select the appropriate elasticity range of the film that requires the fewest rotations to minimize unnecessary machine wear and increase production speeds.

Frequency of sending loads. In addition to selecting the right film, stretch film users should take the time to examine the volume and frequency of the items they send. How many pallets are shipped each day, week, or month? How much time and labor are required for each pallet to leave the facility? How much film is used per load? This data will help in selecting the most efficient stretch film for application needs and contribute to significant savings.

Distance the load will travel. The further the load needs to travel, the more stops and starts it will have, leading to increased load movement and agitation. The last thing anyone wants is an overturned pallet upon delivery and, consequently, a defective packaged item.

Environmental conditions during shipment and storage of the load. It is essential to be aware of the conditions (e.g., environments with increased humidity) as the appropriate selection of stretch film will ensure the integrity of the merchandise.

What is the difference between UN big bags compared to standard big bags?

Compared to standard big bags – FIBC, UN big bags are extremely resistant to prevent the leakage of dangerous materials, even when under pressure, characteristics for which they are tested and controlled by internationally recognized certification bodies, such as Labordata, IBE BVI, IIP, Texene BVI, to comply with all required specifications and to ensure smooth and safe transportation.

Depending on the hazard category of the material, UN-certified big bags are manufactured according to the standards of each of the following classes:

13H1: woven polypropylene (PP), without waterproof coating, without internal liner
13H2: woven polypropylene (PP), with waterproof coating, without liner
13H3: woven polypropylene (PP), without waterproof coating, with liner
13H4: woven polypropylene (PP), with waterproof coating, with liner

Λύσεις Γεωργικών Εφαρμογών


What are the most common types of shading nets?

Shading nets effectively protect fruits, vegetables, and ornamental plants, creating a microclimate of protection from ultraviolet radiation. When selecting the appropriate shading net, factors such as weight, dimensions, and color should be considered. However, the most significant factor is the shading percentage, which is determined by the weaving type.

The most common types of shade nets include:

Shade nets with a shading percentage of 25% – 30%
Suitable mainly for protecting vegetable crops (such as tomatoes, peppers, etc.) exposed directly to the sun or in greenhouse environments. The E-30 green shade net is also ideal for light wind protection.

Shade nets with a shading percentage of 35% – 40%
The E-60 (green) shade net is primarily used for covering orchard crops and citrus cultivation.

Shade nets with a shading percentage of 45% – 50%
Suitable for shading and wind protection, protecting plants from sunburns, and aiding in bird protection. Recommended types for areas with intense sunlight include:
E-45 (SHADE NET 45) (black with a shading percentage of 50%)

Shade nets with a shading percentage of 60% – 65%
Heavier nets, such as JAMAICA (E-90), in black-green color, are suitable for crops requiring more shade (e.g., tobacco dryers, greenhouses, etc.) and for construction purposes.
Shade nets with a shading percentage of 70% and above:
These nets offer strong wind protection and higher durability, suitable for challenging weather conditions, such as coastal areas. They can also be used for parking lot covers, camping, shelters, construction, greenhouses, etc.

Such types of nets include:

  • Ε-100 
  • Ε-125 
  • Ε-140 
  • Ε-200 
  • Ε-230 

How and What are Big Bags constructed from?

In special cases and upon customer demand, Big Bags can be constructed:

  • From tubular fabric (circular) for enhanced leak-proofing due to fewer seams they possess
  • With internal reinforcements at the corners (Q Bag/Baffle Bag) to maintain the shape of the FIBC after filling
  • With an integrated liner, meaning a polyethylene bag, for the safe transport of wet materials such as cement
    With laminated fabric to waterproof the interior and provide additional protection against leaks
  • As specified by the Food and Drug Administration (FDA), making them suitable for the safe storage and transportation of food items.

What olive nets should I buy?

Olive nets must meet specific construction specifications to ensure their quality and, consequently, their durability. The most important of these is the material used in their construction, which must come from 100% pure raw material.

Recycled materials should be avoided, as the sources of the raw materials are unknown and can create inconsistencies in terms of the weave and fiber durability, resulting in quicker wear and tear.

Additionally, nets should be stored for reuse. With careful handling, nets can be used for up to 5-6 seasons. The weight of the net is also an important parameter that determines its durability. Producers usually prefer nets with a weight of 90 grams per square meter and 100 grams per square meter. The latter has a 5%-6% higher price but has a higher fiber density and mechanical strength. The prices of nets range depending on their size, from 40 to 70 euros. Their size depends on the density of olive tree planting, with a common size being 6×12 meters.

These specific nets can be used not only for olive harvesting but also for collecting pistachios, walnuts, and other fruits. Finally, an important point that producers must pay attention to is the country of origin, as nets imported from third countries are of very poor quality and made from unsuitable raw materials, which may be toxic to food.

What determines the quality and durability of olive nets?

Olive nets, often referred to as canvases or linatses, are woven fabrics designed to ensure water permeability and high durability. The quality and durability of olive nets depend on the thickness of the weave and their weight per square meter.

The denser the weave, the greater their strength. They are available in a wide variety of sizes, catering to all the needs of producers. Suitable for use in fields with thorny weeds, as well as in freshly plowed and muddy fields.

Types of tarpaulins and their selection criteria

There are four main types of tarpaulins, each with different characteristics and uses:

  • Cotton canvas tarpaulins are natural and lightweight materials that breathe well but are not waterproof. They are suitable for light protection from dust and sun exposure.
  • Polyethylene (PE) plastic tarpaulins are waterproof, durable, but do not breathe as well. They are resistant to rain and intense sunlight.
  • PVC plastic tarpaulins are waterproof, highly resistant to weather conditions, but less flexible. They are ideal for use in severe weather conditions.
  • Canvas tarpaulins are durable, breathable, but require additional processing for waterproofing. They are suitable for general protection and outdoor use.

To choose the right tarp, it is important to consider the following technical characteristics:

Coverage area dimensions: Depending on the area to be covered, we select the closest size, usually calculating +2 square meters for airflow.
Material: Check the quality and durability of the material to ensure long-lasting performance. Choose a tarp that is weather-resistant and waterproof for better protection.
Certifications: Ask for certifications, especially if it is a waterproof tarp.
Grommets/ties: Preferably choose tarps with grommets to ensure greater safety and facilitate installation.
Weight: Keep in mind that the heavier the tarp, the more resistant it is to scratches, tears, and weather conditions, which also determines its purchase price.
Color: The colors commonly available in the market are white, blue, and green.

Where can you use the anti-hail protection net?

The primary applications of the anti-hail protection net include:

Cold Protection: Anti-hail protection net is placed over plants during the winter months to protect them from low temperatures and frost. It is particularly useful for crops in areas with cold winters.

Wind Protection: It can be used to reduce the impact of air and wind on plants. This helps maintain the temperature and humidity around them.

Sun Protection: This material can also be used to protect plants from intense sunlight and solar radiation.

Differences between white and black ground cover textile

The choice between white and black ground cover textile depends on specific cultivation needs and conditions.

The white ground cover textile from HELLAGRO is ideal for crops that require brightness, as its ability to reflect solar radiation creates the right conditions for enhanced photosynthesis and thus increased productivity. It is suitable for greenhouses, hydroponics, as well as outdoor crops.

The black ground cover fabric from HELLAGRO is particularly durable and is mainly used for weed control. It is suitable primarily for nurseries, covering the soil during the first years of planting and installing fruit-bearing trees, while it can be used in various architectural projects where grass should not grow on the ground.

Where are Big Bags used?

Due to their high degree of customization, big bags are used by a wide range of industries for packaging various materials, such as:

  • Chemicals
  • Pharmaceuticals
  • Fertilizers
  • Food (salt, sugar, pasta, etc.)
  • Grains
  • Seeds
  • Dried fruits
  • Herbs
  • Plastics
  • Construction materials
  • Dyes (paints, pigments)
  • Toxic waste

Food Packaging Solutions


Why should I buy HELLAGRO’s mesh bags for olives?

  • The raw materials are 100% pure and primary, without additives, ensuring the continuous flow of the fiber from which the bag is woven. This results in no weak points in the weave of the sack, which would likely lead to damage (holes) and consequently to loss of fruit.
  • The fiber used to manufacture mesh bags for olives by VERRET does not contain toxic dyes and other harmful additives, making them safe for storing fruit, thus positively contributing to the quality of olive oil.
  • The special weave allows the stored fruit to breathe, preventing them from “sweating,” while also avoiding the accumulation of moisture and oxidation.
  • With proper handling, cleaning, and storage without moisture, they can be used in subsequent seasons.

Where are jute bags used?

Jute bags/sacks are mainly used for the storage and transportation of agricultural products such as olives, potatoes, seed production, dried fruits, legumes, and more.

In addition to fruit packaging, the use of jute bags for the construction of embankments and flood control works is widespread due to their high durability.

What is the difference between RED3 bags and common polypropylene bags?

RED3 woven bags are gray in color, which traditionally distinguishes them in the packaging of olives. The name RED3 comes from the 3 characteristic red stripes that run along the length of the bags, setting them apart from similar products.

Their gray color makes them stand out from white, colored, or transparent polypropylene plastic bags intended for packaging other foods and products, such as animal feed and fertilizers, potato packaging, and industrial materials.

Silage & Baling Solutions


How does temperature affect stored food (silage)?

In order to produce lactic enzymes, it is necessary to achieve an ideal temperature. The color of the harvest is a good indicator for the farmer to calculate the temperature.

The normal temperature of the stored product should give it a light green or yellow color and should emit a pleasant odor like vinegar.

In cases where the stored food emits a strong odor and its color is dark green, it is obvious that the animal feed placement was done under low-temperature conditions.

Ideally, the harvest should have a strong acidic taste with pH values ​​less than 4.5 and be firm to the touch. When we perceive that the product has a brown or black appearance and a smell of spoiled hay or burnt sugar, this is an indication that the process of placing the product for preservation was done at very high temperatures.

What types of baling twine are available?

The first types of baling twine were made from natural fibers such as Manila, cotton, and sisal.

Another natural fiber that was extensively used for the manufacture of twines, ropes, and other products was hemp, which, however, proved unsuitable as it was quite rigid and created many problems in baling machines.

In the 1960s, companies began experimenting with other types of materials for the manufacture of baling twines. The first material used was polypropylene, a plastic that provided significant advantages over sisal, as it was stronger, had higher resistance, and was suitable for baling much larger bales of hay and other materials.

The technology of baling twine has now advanced considerably, and various synthetic raw materials are used in their production. Most of these twines are now made from many smaller threads (fibers) that are twisted or woven together to form a dense and strong thread, resistant to various strains.

Today, many types of baling twines are used in industrial applications such as waste baling, newspapers, and recyclable materials (e.g., cardboard, burlap, etc.). Baling twine is available in a wide range of colors, strengths, and materials.