How to glue plastic film. How to seal a bag at home

How to glue plastic film? This seemingly simple question constantly puzzles many summer residents and garden lovers.

After all, if you decide to build yourself a greenhouse for the first time, you will have two options - purchase a ready-made one (the pleasure is not cheap) or glue a film of the required width.

To make your search easier, here is a short guide on how to glue polyethylene film.

First you need to purchase polyethylene from required quantity, but take it with a reserve, since you need to overlap. Do you have plastic wrap?

This means that you have very few tools left, namely: an iron, sheets of paper and preferably two assistants, plus a table or other flat surface.

The film is welded according to following diagram: take the film and overlap the edges to be glued over each other (the width of the overlap should be equal to the width of the iron being used with a margin of 5 centimeters).

We lay the prepared paper (you can use regular newspaper folded in half) slightly wider than the overlap.

We take two small segments and select them using the “butt” method optimal temperature, at which the welding of polyethylene film will be carried out

If this is not done, then when gluing large pieces of film, it may become unusable, melting due to the iron temperature being too high or the exposure time being exceeded.

After selecting the temperature on the table, we perform gluing; it is advisable to have two assistants who will not only evenly move the film being glued, but also level the finished overlap.

Note to everyone who will be gluing plastic film - the paper cannot be immediately removed from the hot film, in order to avoid tears.

Let it cool a little and then remove it.

In conclusion, we note that polyethylene film for greenhouses is very easy to glue at home.

However, if you need to cover the greenhouse big size, then look in hardware stores for a special apparatus for gluing polyethylene and your work will become much easier.

How to glue plastic film? This seemingly simple question constantly puzzles many summer residents and garden lovers. After all, if you decide to build yourself a greenhouse for the first time, you will have two options - purchase a ready-made one (the pleasure is not cheap) or glue a film of the required width.

To make your search easier, here is a short guide on how to how to glue film made of polyethylene. First, you need to purchase polyethylene in the required quantity, but take it with a reserve, since you need to overlap. Do you have plastic wrap? This means that you have very few tools left, namely: an iron, sheets of paper and preferably two assistants, plus a table or other flat surface.

Film welding is done according to the following scheme: take the film and overlap the edges to be glued over each other (the width of the overlap should be equal to the width of the iron used with a margin of 5 centimeters). We lay the prepared paper (you can use regular newspaper folded in half) slightly wider than the overlap. We take two small segments and, using the “butt” method, select the optimal temperature at which it will be carried out. welding of polyethylene film(if this is not done, then when gluing large pieces of film, it may become unusable, melting due to the iron temperature being too high or the exposure time being exceeded). After selecting the temperature on the table, we perform gluing; it is advisable to have two assistants who will not only evenly move the film being glued, but also level the finished overlap.

Note to everyone who will be gluing plastic film - the paper cannot be immediately removed from the hot film, in order to avoid tears. Let it cool a little and then remove it.

In conclusion, we note that polyethylene film for greenhouses It is glued together at home very easily, but if you need to cover a large greenhouse, then look in hardware stores for a special device for gluing polyethylene and your work will become much easier.

More on the topic:

Welding of film panels can be done in two ways.

Film gluing method 1

Place one sheet of film on top of another, cover them with newspaper or fluoroplastic film on top, then slowly run the edge of an iron, a soldering iron tip or a roller over the junction of the panels, after preheating it to 250 °C.

Film gluing method 2

You can connect the edges of the panels as follows: clamp them between 2 smooth strips of metal so that the edges of the film protrude about 1 cm from under them, and melt them with the flame of an alcohol lamp or blowtorch.

To glue the film, you can also use xylene and trichlorethylene, heated to 70 - 75 ° C. At a temperature of 30 °C, film panels can be glued with 80% acetic acid. If you choose one of the above substances to connect the film parts, use extreme caution when working with them.

The film can be glued using BF-2 or BF-4 adhesives, having previously treated the surfaces to be joined with a 25% solution of chromic anhydride. PK-5 glue is best suited for joining panels of polyamide film. Be sure to iron the seam obtained after gluing with a warm iron heated to a temperature of 50 - 60 °C.

More recently, superglue has appeared on sale, which is designed specifically for plastic film.

How to seal a bag with an iron

It gives a very strong, water-resistant and elastic connection. In addition, it is absolutely odorless, and the connections are transparent and practically invisible. With one bottle of glue with a capacity of 50 ml, you can glue a seam 15 - 20 m long.

Since superglue contains solvents used in everyday life, when working with it it is recommended to take the same precautions as when using household solvents. chemical substances. If stored in sealed packaging, the shelf life of the glue is unlimited. If it dries out, it is enough to dilute it with acetone to restore its original properties.

Superglue is also useful for repairing finished film coatings. Method of its use in in this case is as follows. Apply with a brush or stick thin layer glue around the damaged area with outside film coating. Let it dry for 2 hours. Then cut out a patch of the required size from the film, attach it to damaged area and smooth it out well. You can even glue old film with superglue. However, you should know that it is best to repair film coatings in sunny weather.

If you want to sew film panels with threads, overlap them on top of each other. Place stitches infrequently. To increase the strength of the seam, use a paper gasket. This method of joining film sheets is most often used when it is necessary to apply a patch to the film covering before it is stretched onto the frame or when an already stretched film breaks.

Minor damage to the film can be sealed with adhesive tape.

If you found an error in the text, please let us know: highlight it and click: Ctrl + Enter!

Polymer film is used for a variety of purposes.

How to glue an applique (thermal adhesive) to clothes: an “invisible cap” for scuffs and holes

But first of all, we're talking about on the design of waterproofing screens for various structures. And, since such a technological screen is not a “cast” part, many are interested in the question of how to glue the film so as not to lose the unique waterproofing properties of the finished polymer product at the junction?

Why is it necessary to weld and not glue the film?

The fact is that absolutely reliable gluing of polyethylene practically does not exist - this material only needs to be welded! Moreover, weld using a special apparatus. And the most reliable welding method is the “hot wedge” method. Therefore, if the question arises of how to glue polyethylene to achieve maximum waterproofing, you should remember that it is much more reliable to weld such a structure than to glue it!

How to solder the film?

How to glue plastic film is, of course, everyone decides for themselves, taking into account the specific requirements for finished product and your own capabilities. But, if we are talking about reliable waterproofing screens - especially large industrial products - then, as a rule, there are no questions about how to glue PVC film or how to glue polyethylene. Obviously, such screens only need to be welded using special welding machines, which can be purchased on our website.

Polyethylene welding technology

Experts are confident that in order to obtain a waterproofing screen with a reliable seam, it is necessary to use special “hot” welding. When using it, the cut parts made of polyethylene are literally soldered into a single fabric.

How to weld plastic film correctly?

Of course, you need to understand how to solder the film correctly - without flaws in the form of a loose seam or missing places. When asked how to weld a film to obtain a reliable waterproofing product, the managers working on our website will always recommend one of the welding units that will cope with the task as accurately as possible. But, before giving you recommendations on how to solder polyethylene film or how to weld polyethylene film, they will need to know all the conditions of the upcoming work, as well as technological and operational

If you want to seal a regular plastic bag with a household iron, then yes, it is possible. But if you want to seal a durable bag, it won't be that easy. These bags are sealed using industrial heat sealing in large factories.

Resistant bags are usually sealed with special sealing machines. They are different sizes and power. The heat sealing process is used for most specially printed or plain bags, and is actually the final step in packaging the product into a bag.

There are two types of plastic that are used to make stand-up pouches - thermoset plastic and thermoplastic. As a rule, barrier bags that are made of thermoplastic can be resealed. But the results will not be very good. Bags made of thermosetting plastic cannot be sealed with an iron.

Having agreed that a doypack cannot or should not be sealed at home using an iron, let's think about why this might be needed. The only logical explanation is to keep the contents safe after the package has been opened.

It turns out that if the manufacturer makes bags with ZIP locks, customers will not have the idea of ​​​​sealing bags at home. There are two types of ZIP locks - single and double, depending on the requirements of the product being packaged.

Adding a ZIP lock to the package does not significantly increase the cost. But it makes storing the product easier. Customers generally prefer bags that are easy to store, which means more sales for businesses that use ZIP locks.

How to solder plastic film at home?

Essentially, the few extra cents you spend on a ZIP lock will result in more sales.

Going back to the original question, DO NOT use an iron to seal the bag. Instead, buy products that are stored in zip lock bags. This way you can reseal them after using them again. This makes it easier and safer to keep your food crispy and protected from moisture!

Polyethylene is a thermoplastic polymer that exists in various modifications with unique properties. This is caused due to the branching structure of its macromolecules.

This article will discuss the basic properties of polyethylene and its areas of application.

What are the main properties and characteristics of polyethylene?

Polyethylene is an opaque polymer in a thick layer. It crystallizes at temperatures from -60 to -269 degrees. At temperatures above 80 degrees, it first swells and then dissolves in aromatic carbons. Among its main properties and characteristics are the following:

Polyethylene is resistant to aqueous saline solutions, alkalis, and acids, but at temperatures above 60 degrees it will still be destroyed by sulfuric or nitric acids.

At room temperature not absorbed by organic solvents. You can read more about this on this page.

If this polymer is treated with oxidizing agents such as chromium mixture, this leads to oxidation of the surface. It is moistened with water, adhesives or polar liquids, which makes it possible to glue products made from this material.

The more branches there are in the structure of polymer macromolecules, the less crystallinity of the material. This determines its properties and density. Low-density polyethylene films are up to ten times more permeable than their high-density counterparts.

The higher the degree of crystallinity and molecular weight, the higher its mechanical properties.

How to glue a bag

This determines the flexibility, transparency and rigidity of the finished products.

Areas of application of polyethylene

The scope of polyethylene is quite wide. It directly depends on its characteristics. The polymer is used to produce the following goods:

• Packaging, agricultural and shrink films. These products are in demand all year round.
• Water, gas, pressure and non-pressure pipes. In production, these elements are considered essential materials.
• Sanitary products, fibers and building materials. Basically, such goods are seasonal, but are in considerable demand in the market.
• Canisters, tanks, bottles and other containers, as well as household items.
• Parts of cars and various equipment that will always be relevant.
• Prostheses of internal organs.

Polyethylene is a universal polymer, which, due to its unique properties widely used in production.

Welding the film is one of the work operations that may sometimes be necessary. For many types of work, pieces of polyethylene film need to be tightly connected to each other. Most often this is necessary for the construction of a greenhouse, greenhouse, and installation of vapor barriers during construction.

There are many ways to weld polyethylene film. The operation itself involves bonding layers of material by heating, creating a temperature convenient for melting. When the layers are compressed, a weld is formed.

Welding polyethylene occurs as follows: When heated, the layers change structure, connect at the molecular level, and after cooling, a strong seam is formed.

To glue polyethylene film, the layers should be thoroughly cleaned - with any contamination, the strength characteristics are greatly reduced.

Foreign impurities pass into the molten mass, which disrupt the molecular structure in the seams.

For a high-quality connection with high strength, the following conditions must be met:

• when welding film, its pieces must be homogeneous and belong to the same batch;
• surfaces must be clean;
• temperature regime when working, choose correctly - if the heating is insufficient, the strength deteriorates, if it is too warm, the joint and the pre-seam area will be deformed;
• When heating, sufficient compression must be ensured.

To connect PVC film quality, it is impossible to re-weld the edges of the material. If it is necessary to perform such an operation, first cut off the damaged edges.

Both during construction operations and for domestic needs, the following connection methods can be used:

• welding with a soldering iron equipped with special nozzles - it acts as a homemade welding apparatus;
• joining when heated, melting the film with an iron;
• the desired temperature of the layers is achieved using a burner;
• Industrial equipment is used to heat the seam.

You can try heating the film with a hairdryer, then tightly connect the surfaces intended for gluing to each other, or better yet, put it under a press.

Welding film with a soldering iron

How to glue plastic film using a soldering iron? This method can easily be considered one of the most common - the tool is easily accessible, allows you to get a good result, and with a little modification of the soldering iron, the effect can be improved.

It should be taken into account that without modification it will not always be possible to make a tight connection - the joints may be uneven, the material spreads.

This way you can glue a film for a greenhouse or make a canvas for other needs. Only for very small volumes of work can we recommend using a PVC connection with a soldering iron. With a little tweaking, it turns into a convenient and easy-to-use tool.

Iron as a welding heater

How to glue film using an iron - the simplest one household appliance, which is in every home? Everything is very simple - the work consists of melting polyethylene and creating joints using the heated sole of the iron.

Improvised welding machine made of iron allows you to join large areas of film. In this case, the seams can be made with a certain width. All modern irons have a thermostat that allows you to regulate the heating temperature.

• Before gluing the film, provide a comfortable place to work - best wooden will do smooth surface.
• The film is laid overlapping, the top layer is covered with fluoroplastic or paper, the sole of the iron is pressed and guided along the welding line.
• The pressing speed and force are determined experimentally, and the temperature is selected.

Professional tools for welding

To join the film at home, you can make a variety of tools with your own hands, but they are only suitable for performing small-scale work. If large-scale production is necessary - commercial activity, creation of a greenhouse or greenhouses - the use of these devices has the greatest effect. No other glue has the same capabilities.

The welding process is faster; professional devices allow you to set the required pressure parameters, speed of progress along the weld seam, and temperature.

Most professional devices have tension and drive rollers that pull the film from optimal speed, which has a beneficial effect on the quality of the seam.

Quite often, people are faced with the need to repair a polyethylene product or attach film joints. As a rule, simple glue will not help in this matter, because... this type plastic has a poorly bonded surface, so special welding of polyethylene film cannot be done here. By the way, polyethylene welding can be done using variety of options, the simplest of which is the use of double-sided tape. Of course, this option helps to quickly connect parts made of this material, but you should not count on the seam to withstand a large load. Therefore, it is best to turn to the most common method of joining film parts, which includes welding, which is recommended to be done very carefully so that heat treatment does not damage the material.

The welding itself is carried out in three ways: using a soldering iron, an iron or a homemade thermal roller. To solder polyethylene with a soldering iron, you must initially make a special nozzle for it. It is made from a copper plate measuring 40x20 millimeters. In these plates, several holes are drilled along the diameter of the cotter pin. After which, the resulting plate is driven into a tube, which is put on the soldering iron tip. Using a copper plate, you need to make a round wheel. Thanks to the chisel, its edges are made wavy. Then you need to take the prepared shoe nails and use them to connect the wheel to the tube. Now you can begin the process itself by heating the soldering iron well until it turns red. This soldering iron is passed over the area of ​​​​the plastic film that needs to be soldered. Residues of cellophane can be easily removed from the wheel with felt.

By the way, using the method described above, you can not only weld the film, but also carefully cut it, avoiding various kinds defects. As for the iron, with which you can join polyethylene, in this case you also cannot do without a homemade attachment. As a rule, this device should be a T-shaped profile having a length of about forty centimeters. Aluminum was used for its manufacture. If we talk about that part of the profile through which the polyethylene film will be welded, then it must be cleaned. The best way to do this is with a soldering iron and sandpaper. From a millimeter sheet of aluminum you need to cut a nozzle corresponding to the size of the sole of the iron. It should have a small offset of ten millimeters for bending. In its middle part, a longitudinal hole is made according to the size of the profile.

The polyethylene film to be welded must be carefully placed on the surface, which must be flat. Foil is already placed on the cellophane itself. If you don’t have foil on hand, it can easily be replaced with fabric that does not have synthetic impurities. Next, use an iron with a nozzle to slowly walk along the strip to be welded. But for the last method of film welding, it is recommended to build a thermal roller. To do this, steel is taken and brackets for the thermal roller are made from it (they must be one millimeter thick). Holes with a diameter of five millimeters are made along the edges of these brackets. A steel washer is perfect for making a roller. The roller itself needs to be rounded at the ends using sandpaper. It is also recommended to use the same sandpaper to give it a good treatment. work surface so that it becomes smooth.

The mechanical part of the thermal roller is usually made of four brass washers, the diameter of which is about eleven millimeters. These washers must be sanded before use. By the way, absolutely all surfaces that will rub during the work process are treated with graphite powder and then installed on a thermal roller. Now it should be very firmly fixed to the soldering iron tip with a nut. The heating of the thermal roller is adjusted by loosening or turning the screw that connects this structure to the soldering iron tip. Thanks to any of the methods described above, you can safely solder polyethylene film of any size without any problems. By the way, when working with the iron, you must carefully ensure that its back does not touch the cellophane, since it is quite difficult to remove the remnants of this material from the iron.

And finally, welding of polyethylene can be done using a special electrical device or a manual sealer designed specifically for these purposes. If it makes sense to always have such a device on hand, and if a person often works with polyethylene (for example, is the owner of greenhouses in the country or collects huge harvests of fruit and wants to preserve them), you can purchase it at any specialized store. Next, be sure to read the instructions for the thermal installation and follow its contents to make a thermal seam. Devices of this nature, as a rule, do not require enormous effort to operate, because they are classified as universal (they can be used to solder not only polyethylene, polypropylene, but also laminated paper). Finally, it is worth recalling that when working with electrical appliances, you must certainly follow safety rules!

According to parameters, photos, cost.

The LENTAPACK company produces and sells wholesale and retail various polyethylene films:
- greenhouse;
- technical;
- construction.

The length of the rolls is from 15 to 100 m, the width is from 1000 to 1500 mm.

Buyers are interested in how to obtain a single piece of large area or how to glue plastic film stronger. After all, thanks to the high quality characteristics– elasticity, lightness, strength – our products are used not only in everyday life, but also in many sectors of the economy:
- in construction for waterproofing foundations, basements and ceilings;
- in agricultural production for growing early vegetables, flowers and berries;
- in transport enterprises for covering cargo.

Welding of film panels can be done in two ways.

Film gluing method 1

Place one sheet of film on top of another, cover them with newspaper or fluoroplastic film on top, then slowly run the edge of an iron, a soldering iron tip or a roller over the junction of the panels, after preheating it to 250 °C.

Film gluing method 2

You can connect the edges of the panels as follows: clamp them between 2 smooth strips of metal so that the edges of the film protrude about 1 cm from under them, and melt them with the flame of an alcohol lamp or blowtorch.

To glue the film, you can also use xylene and trichlorethylene, heated to 70 - 75 ° C. At a temperature of 30 °C, film panels can be glued with 80% acetic acid. If you choose one of the above substances to connect the film parts, use extreme caution when working with them.

The film can be glued using BF-2 or BF-4 adhesives, having previously treated the surfaces to be joined with a 25% solution of chromic anhydride. PK-5 glue is best suited for joining panels of polyamide film. Be sure to iron the seam obtained after gluing with a warm iron heated to a temperature of 50 - 60 °C.

More recently, superglue has appeared on sale, which is designed specifically for plastic film. It gives a very strong, water-resistant and elastic connection. In addition, it is absolutely odorless, and the connections are transparent and practically invisible. With one bottle of glue with a capacity of 50 ml, you can glue a seam 15 - 20 m long.

Since superglue contains solvents used in everyday life, it is recommended to follow the same precautions when working with it as when using household chemicals. If stored in sealed packaging, the shelf life of the glue is unlimited. If it dries out, it is enough to dilute it with acetone to restore its original properties.

Superglue is also useful for repairing finished film coatings. The method of its application in this case is as follows. Using a brush or stick, apply a thin layer of glue around the damaged area from the outside of the film covering. Let it dry for 2 hours. Then cut out a patch of the required size from the film, apply it to the damaged area and smooth it well. You can even glue old film with superglue. However, you should know that it is best to repair film coatings in sunny weather.

If you want to sew film panels with threads, overlap them on top of each other. Place stitches infrequently. To increase the strength of the seam, use a paper gasket. This method of joining film sheets is most often used when it is necessary to apply a patch to the film covering before it is stretched onto the frame or when an already stretched film breaks. Minor damage to the film can be sealed with adhesive tape.