Dec. 09, 2024
In today's fast-paced business environment, especially in industries like logistics, manufacturing, and retail, efficiency and cost-saving measures are critical. One often overlooked tool that can provide both is stretch film. If you're responsible for shipping or packaging, you probably know what stretch film is, but have you considered the benefits of buying it wholesale? Not only does purchasing in bulk save money, but it also ensures smoother operations by keeping you well-stocked.
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This article will walk you through everything you need to know about stretch film wholesale, from understanding its different types to choosing the best supplier. We'll also share practical tips to help you maximize your savings and efficiency!
Jumbo roll stretch filmBefore diving into the wholesale aspects, let's break down what stretch film is. Stretch film, also known as stretch wrap, is a highly elastic plastic made from linear low-density polyethylene (LLDPE). It's primarily used to wrap goods, especially pallets, to secure them during transport or storage. The film stretches tightly around the load, clinging to itself to form a stable, protective layer.
Choosing the right type of stretch film for your business is crucial, especially when buying in bulk. Here are the main varieties:
The most obvious reason to buy stretch film wholesale is the cost savings. When purchased in bulk, suppliers often offer discounts, lowering the per-unit price. If your business regularly uses stretch film, these savings can add up over time.
Purchasing stretch film wholesale ensures that you're always stocked. No more emergency orders when you're running low during busy periods'bulk buying gives you peace of mind and helps you avoid costly delays.
Ordering stretch film in large quantities means fewer purchase orders, reducing administrative tasks. You can stock up for months, freeing up time to focus on other business matters.
Wholesale buyers often form stronger relationships with their suppliers, which can lead to better customer service and even access to customized products. Suppliers are more likely to prioritize large-volume clients, giving you an edge over smaller buyers.
Selecting the right supplier can make or break your bulk-buying experience. Here are some factors to consider when making your choice:
Research the supplier's track record by checking online reviews or asking for referrals from other businesses in your industry. A reputable supplier will consistently deliver high-quality products and meet deadlines.
The best suppliers offer a wide range of stretch films to meet different business needs. Whether you need hand, machine, blown, or cast film, your supplier should have the options that fit your specific packaging requirements.
While it's tempting to go for the cheapest option, low-quality stretch film can lead to wasted material, damaged goods, and other inefficiencies. Invest in a supplier that offers both competitive pricing and reliable quality.
Check the supplier's delivery capabilities, especially for large orders. Delays in receiving your stretch film can throw off your entire production schedule.
With growing attention on reducing environmental impact, many suppliers now offer eco-friendly stretch films, such as those made from recycled materials. Ask your supplier about their sustainability practices to align with your company's green initiatives.
Buying in bulk isn't just about purchasing'using the stretch film correctly is key to getting the most out of your investment. Here are a few tips:
Businesses typically see savings of 10-30% depending on the supplier and order size. Over time, these savings can significantly improve your bottom line.
Yes, most suppliers have a minimum order requirement for wholesale. Be sure to check the specifics with your supplier.
Blown stretch film offers superior strength and puncture resistance, making it ideal for heavy-duty applications. Cast stretch film is clearer, quieter, and best suited for lighter loads.
If you're wrapping more than 20 pallets a day, investing in a machine will save you time and labor costs. It also ensures more consistent wrapping, reducing product damage during shipping.
Develop a strong relationship with your supplier. Ensure they offer quality assurance, reliable shipping policies, and a clear returns process. A dependable supplier helps prevent interruptions in your operations.
Never order in bulk without testing the product first. Request samples to evaluate the stretch film's durability and overall performance.
Don't just focus on immediate savings'think about your long-term packaging needs. Calculate how much stretch film you'll use over the next several months and adjust your bulk order accordingly.
When buying wholesale, it's essential to select the right stretch film for your application. Here are some factors to consider:
Stretch film is a critical component for any business that relies on efficient packaging and shipping. Buying stretch film wholesale allows you to save money, ensure consistent supply, and build strong supplier relationships. By understanding the different types of stretch film, selecting the right supplier, and implementing best practices, your business can optimize its packaging process, reduce waste, and boost productivity.
So, if you're ready to take your packaging game to the next level, start exploring wholesale options today! With the right approach, you'll keep your products secure while keeping your costs in check.
Don't forget to regularly assess your packaging needs. As your business grows, so will your demand for stretch film. Keeping an eye on usage trends will help you plan bulk purchases more efficiently!
Stretch film, is the earliest in China to use PVC as the base material, DOA as the plasticizer and self-adhesive function to produce PVC stretch film. Due to environmental problems, high cost (large relative PE ratio, less unit packaging area), poor stretchability and other reasons, when the domestic production of PE stretch film began in to , it was gradually eliminated. PE stretch film was first made of EVA as self-adhesive material, but its cost is high and tasteful. Later, PIB and VLDPE were used as self-adhesive materials. The base material is now LLDPE, including C4, C6, C8 and metallocene PE. (MPE).
In the early days, LLDPE stretched films were mostly blown films, and developed from single-layer to two-layer and three-layer; now, LLDPE stretched films are mainly produced by casting method. It has the advantages of uniformity and high transparency and can be applied to the requirements of high-magnification pre-stretching. Since single-layer casting cannot achieve single-sided adhesion, the application field is limited. The material selection of single-layer and double-layer casting is not as wide as that of three-layer casting, and the formula cost is also high, so the structure of three-layer co-extrusion is still ideal. A high-quality stretch film should have the characteristics of high transparency, high longitudinal elongation, high yield point, high transverse tear strength, and good puncture performance.
Production process conditions
Casting production is due to the long and narrow flow channel and fast flow speed. The temperature range of the melt is generally controlled at 250 ° C ~ 280 ° C, the temperature of the casting cooling roll is controlled at 20 ° C ~ 30 ° C, and the winding tension is low. Within 10kg, to facilitate the migration of the viscous agent and reduce the internal stress of the finished film.
Sticky control
Good viscosity makes the packaging film layers and layers outside the goods stick together to make the goods firm. There are two main ways to obtain the viscosity: one is to add PIB or its masterbatch to the polymer; the other is to blend VLDPE. PIB is a translucent viscous liquid. Direct addition requires special equipment or equipment modification. Generally, PIB masterbatch is used. There is a process for PIB to move out, which usually takes three days. In addition, it is also affected by temperature. When the temperature is high, the viscosity is strong; when the temperature is low, it is not too sticky, and the viscosity is greatly reduced after stretching. Therefore, it is best to store the finished film within a certain temperature range (recommended storage temperature is 15 ' ~ 25 '). Blending VLDPE, the viscosity is slightly poor, but there is no special requirement for the equipment, the viscosity is relatively stable, not controlled by time, but also affected by temperature, when the temperature is higher than 30 ', it is relatively viscous, and when the temperature is lower than 15 ', the viscosity is slightly worse, and it can be The desired viscosity is achieved by adjusting the amount of LLDPE in the adhesive layer. This method is mostly used in three-layer co-extrusion.
Packaging form of stretch film
Sealed package
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This type of packaging is similar to shrink wrap, where the film wraps the tray around the tray, and then two heat grippers heat seal the film at both ends together. This is the earliest form of wrapping film, and more packaging forms have been developed from this
Full-width packaging
This kind of packaging requires that the film width is enough to cover the tray, and the shape of the tray is regular, so it is suitable for use with a film thickness of 17-35μm
Hand-packed
This kind of packaging is the simplest kind of wrapping film packaging, the film is loaded on a rack or by hand, and the film is rotated by the tray or the film is rotated around the tray. Mainly used for repackaging after the packaged pallet is damaged, and ordinary pallet packaging. This kind of packaging speed is slow, and the suitable film thickness is 15-20 μm;
Stretch film wrapping machine packaging
This is one of the most common and widespread forms of mechanical packaging. The tray rotates or the film rotates around the tray. The film is fixed on the support and can move up and down. This packing capacity is very large, about 15 to 18 trays per hour. The suitable film thickness is about 15-25μm;
Horizontal mechanical packaging
Different from another packaging, the film revolves around the item, which is suitable for the packaging of long goods, such as carpets, boards, fiberboards, special-shaped materials, etc.;
Packaging of paper tubes
It's one of the newest uses for stretch wrap, and it's better than old-fashioned paper tube wraps. The suitable film thickness is 30'120μm;
Packaging of small items
This is the latest packaging form of wrapping film, which can not only reduce material consumption but also reduce the storage space of pallets. In foreign countries, this kind of packaging was first introduced in . Just one year later, many such packaging appeared on the market. This packaging format has huge potential. Suitable for the film thickness of 15 ~ 30μm;
Packaging of tubes and cables
This is an example of the application of stretch film in a special field. The packaging equipment is installed at the end of the production line, and the fully automatic stretch film can not only replace the tape to bind the material, but also play a protective role. The applicable thickness is 15 to 30 μm.
Stretch form of pallet mechanism packaging
The packaging of the stretch film must be stretched, and the stretching forms of pallet mechanical packaging include direct stretching and pre-stretching. There are two types of pre-stretching, one is roller pre-stretching and the other is electric stretching.
Direct stretching is done between the tray and the film. This method has a low stretch ratio (about 15% to 20%). If the stretch ratio exceeds 55% to 60%, it exceeds the original yield point of the film, the film width is reduced, and the puncture performance is also lost. easy to break. And at a 60% stretch rate, the pulling force is still very large, and for light cargo, it is likely to deform the cargo.
Pre-stretching is done by two rolls. The two rollers of the roller pre-stretching are connected by a gear unit. The stretching ratio can be different according to the gear ratio. The pulling force is generated by the turntable. Since the stretching is generated at a short distance, the friction force between the roller and the film It is also large, so the film width does not shrink, and the original puncture performance of the film is also maintained. No stretching occurs during actual winding, reducing breakage due to sharp edges or corners, and this pre-stretching can increase the stretch ratio up to 110%.
The stretching mechanism of electric pre-stretching is the same as that of roller pre-stretching. The difference is that the two rollers are driven by electricity, and the stretching is completely independent of the rotation of the tray. Therefore, it is more adaptable and suitable for light, heavy and irregular goods. Due to the low tension during packaging, the pre-stretching ratio of this method is as high as 300%, which greatly saves materials and reduces costs. Suitable for the film thickness of 15 to 24 μm.
Features of stretch film
Unitization: This is one of the biggest features of stretch film packaging. With the film's superior winding force and retractability.
Primary protection: The primary protection provides surface protection of the product, forming a very light and protective appearance around the product, so as to achieve the purpose of dustproof, oil-proof, moisture-proof, waterproof and anti-theft. It is particularly important that the wrapping film packaging makes the packaged items evenly stressed to avoid damage to the items caused by uneven stress, which cannot be achieved by traditional packaging methods (bundling, packaging, tape and another packaging).
Compression fixation: The product is wrapped and packaged by the retraction force of the stretched film to form a compact unit that does not take up space as a whole so that the pallets of the product are tightly wrapped together, which can effectively prevent the product during transportation. The mutual dislocation and movement, and the adjustable tensile force can make the hard products close to each other and make the soft products tighten, especially in the tobacco industry and textile industry, which has a unique packaging effect.
Cost saving: The use of wrapping film for product packaging can effectively reduce the cost of use. The use of wrapping film is only about 15% of the original box packaging, about 35% of the heat shrinkable film, and about 50% of the carton packaging. At the same time, it can reduce the labor intensity of workers, and improve the packaging efficiency and packaging grade.
To sum up, the application fields of the stretch film are very wide, and many fields in China have not yet been covered, and many fields that have been involved are not widely used. With the expansion of application fields, the amount of stretch film will be greatly increased. , its market potential is immeasurable. Therefore, it is necessary for us to vigorously promote the production and application of the stretch film.
Introduction of PE stretch film and stretch film
PE stretch film (also known as stretch film) has high tensile strength, tear strength, and good self-adhesion, so it can wrap the object into a whole and prevent it from falling off during transportation. The film has excellent transparency. The wrapped object is beautiful and elegant and can make the object waterproof, dustproof and damage-proof. The film is widely used in the packaging of cargo pallets, such as the packaging and packaging of electronics, building materials, chemicals, metal products, auto parts, wires and cables, daily necessities, food, paper and other industries. Specifications: machine film width 500mm, manual film width 300mm, 350mm, 450mm, 500mm, thickness 15um-50um. Various specifications can be cut online. The stickiness is divided into single-side sticky and double-side sticky. The products are divided into two series: hand-wound film and machine-use film.
Features: The product has good buffer strength, puncture resistance and tear resistance, thin thickness and good cost performance. It has high tensile strength, tear strength, transparency and good retraction force. The pre-stretching ratio is 400%. It can be assembled, waterproof, dustproof, anti-scattering and anti-theft. Uses: used for pallet wrapping and another wrapping packaging, widely used in foreign trade export, bottle and can making, paper making, hardware and electrical appliances, plastics, chemicals, building materials, agricultural products, food and other industries.
PE stretch film is an industrial film product with high tensile strength, high elongation, good self-adhesion and high transparency. It can be used for manual wrapping film, and can also be used for machine wrapping film, which can be widely used in the centralized packaging of various goods.
PE wrapping film is mainly mixed and extruded from several different grades of polyolefin resin, which has puncture resistance, super strength and high performance. The strong waterproof effect is widely used in foreign trade export, papermaking, hardware, plastic chemical, building materials, food and pharmaceutical industries.
PE stretch wrapping film: LLDPE stretch wrapping film is made of high-quality LLDPE as the base material, with the addition of a high-quality tackifier, after heating, extrusion, casting and then cooling by a chill roller. It has the advantages of strong toughness, high elasticity, tear resistance, high viscosity, thin thickness, cold resistance, heat resistance, pressure resistance, dustproof, waterproof, single-sided and double-sided adhesive, etc., which can save materials and labor when using it. , Save time, widely used in papermaking, logistics, chemical industry, plastic raw materials, building materials, food, glass and so on.
Stretch film principle
The wrapping film uses the super strong wrapping force and retractability of the film to bundle the product into a unit compactly and fixedly. Even in unfavorable environments, the product has no looseness and separation and no sharp edges and stickiness, so as not to cause damage.
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