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Chinese stretch film comes in several types, each serving specific packaging needs for various industries. This film's diversity makes it a powerful tool for achieving optimal product protection, whether it's for manual wrapping or machine-based operations.
This film is engineered through a casting process. During this process, molten polymer is spread over a chill roller. Then it is further processed into film. It possesses a high clarity that improves product visibility. Its unique characteristic lies in its ability to deliver consistent thickness. That results in exceptional stretchability. These traits make it a common choice in various packaging tasks in warehouses.
Blown film is a different stretch film, set apart by its production technique. This film enhances stretch and retention of load shape due to its thicker layers. The film's surface also features anti-slip properties. Thus, providing superior grip that minimizes load shifting during transport. Even though prone to a slightly higher modulus of elasticity. This results in reduced stretch when compared to cast films. It still finds extensive use in heavy and irregularly shaped product packaging. This is due to its unparalleled strength and puncture resistance.
This film is pre-stretched. It is designed to ensure uniform tension across the load. The film guarantees that even after maximum stretch, it will not lose its elasticity. Its controlled unwinding and usage of less film material make it economically viable. That is why it is especially suitable for lots and repetitive shipments.
Highly stretchable film can significantly outperform standard stretch films in terms of elasticity. Capable of extending up to 700% of its initial length, this film not only provides exceptional security for loads but also integrates seamlessly with automatic wrapping equipment. The resultant tighter wraps lead to enhanced load stability and material conservation. This makes it a go-to solution for firms that demand superior wrapping efficiency and security for their products.
Stretch film comes in both colored and opaque forms designed for applications where product confidentiality or aesthetic appeal is critical. Colored films, available in multiple hues, not only serve a decorative function but also aid in brand representation. Opaque films, on the other hand, provide a complete shield of opaqueness around the product. This prevents any prying eyes from gaining insight into the nature of the packaged goods. Both variants contribute to increased security during transit by disallowing unauthorized access. Therefore, they are perfect for companies prioritizing confidentiality and branding.
The design of China stretch film is carefully thought out to enhance both its structural integrity and its functional performance capabilities. The advancements in the designs used have contributed greatly to several packaging needs and environmental norms.
The gauge of stretch film directly correlates to its strength and elasticity. Normally, films with lower thicknesses are used in hand-wrapping procedures. In hand-wrapping procedures, films with lower thicknesses are usually more convenient. These thinner films are approximately 50 to 80 gauges. These are suitable for light and medium goods in securing them. On the other hand, machine stretch films are usually thicker. These films range from 60 to 200 gauges. These films give additional resistance. That makes them suitable for high-speed wrapping activities.
Selvage refers to the part of the film that is not adhesive and is situated on the edge. A well-defined selvage aids in preventing unwinding when the goods are wrapped. A typical selvage width is around half an inch. This is perfect as it boosts stability while not sacrificing too much film area.
On the other hand, edge designs are meant to provide safety to the loads. These designs are made in ways that prevent uneven stretching and tearing. Manufacturers accomplish this by applying notches or other differentiating factors. These improvements help in even film distribution when the film is used in machines.
The surface features of stretch film play an important role in its adherence and flexibility. Pollythene films have been enhanced with anti-slip surfaces. Such films prevent loads from shifting during freight. Also, friction-increasing textures are developed for films used in layer wrapping. This minimizes the chances of film breaking or slipping off. Furthermore, certain films are attached with static control technology.
As companies start prioritizing green values, design limitations of stretch films also include environmentally-friendlier alternatives. These films are made from polylactic acid, which is a biopolymer. Bioplastics also contain recycled materials. These innovations provide the same degree of performance. However, they mitigate the effects of plastic waste.
In warehouses, stretch film is primarily used to bundle items on pallets before storage or shipment. In a warehouse's fast-paced environment, efficiently securing products is vital. That is why hand-wrapping pallets using stretch film is common in warehouses with relatively low output. This is because wrapping a pallet by hand requires much less time by a skilled worker than wrapping it with machinery. Still, for larger warehouses, machinery does the greater stretch film wrapping. Using stretch film improves load stability and protects products from dust and moisture. This is why it is important in warehouse operations.
During transportation, stretch film plays a vital role in stabilizing and safeguarding goods. Trucks, trains, ships, and other vehicles face many risks. Some of them are changing the load equilibrium, resulting in product dislocation. Fair transport vehicles are one of the biggest contributors to load shifting. Wrapped pallets with patented stretch film have a higher grip and lower chance of shifting within the pallet. Also, the film offers an extra barrier against dust, moisture, and other environmental factors. This film makes it ideal for securing products that need to arrive at their destination in pristine condition.
Stretch film is also useful for securing products not only in transit but also for use in stores. For example, when stretched over products at the point of sale. The film provides clarity and inhibition over products. This distinguishes the products from other ones in the store. Also, it protects goods from tampering. Such stretch films are mainly used in wraps of single-use products to enhance the goods' appearance while securing and protecting them.
In industries, pallets containing chemical products, machinery parts, and electrical components need tightly securing. Pre-stretched or highly stretchable films are suitable for these applications. They tightly grip such items and secure them from prying. Further, some of these films also contain enhanced resistance to puncture. This is a well-appreciated feature, especially for heavy-duty applications.
Stretch film that is produced today has several advantages besides just performance. The convenience of post-use recovery positively impacts stretch film's environmental effect. Many plastics have low recycling rates for both economic and logistical reasons. However, low recycling rates for plastics is a problem of the past. To solve this, many stretch films include contamination barrier properties. This barrier allows them to be recycled together without needing thorough cleaning or removing contaminants like adhesives or residues.
Although stretch film does not need much care or attention, some minor actions contribute to optimal film performance.
Proper storage
To avoid performance degradation, China stretch film requires minimal care. However, it does need optimal film performance, and storage must be done correctly. This film must be kept out of direct sunlight since UV rays can induce splitting and decrease elasticity. The best packaging film storage environment has consistent temperatures and is free of dust and moisture. Pallets must be stacked neatly without any sharp or hard objects on top of them. This guarantees that pressure is uniformly distributed across the film rolls.
Avoid excessive heat
Excessive temperature has negative effects on both the cling and the tendency to stretch of the film. If the film is stored in a warehouse or truck that is very hot, it will melt. Thus, it is ideal to keep the film in cooler areas.
Clean wrapping equipment regularly
During wrapping, a tiny amount of stretch film might frequently remain stuck to itself. This creates what is called residue on wrapping machines. A lot of residue on wrapping machines adversely affects the film's performance. That is why a lot of residual film must be removed from machines so that they can function properly.
Stretch film comes in numerous gauges, widths, and lengths based on applications.
Gauge
Gauge signifies film thickness and is usually within a 15 to 250 range measured in microns. The greater the gauge number, the thicker the film. Thicker films have additional strength and stretching ability. Thinner films demand less material and are lighter.
Width
Film widths generally vary from around 50 to 1500 mm. These widths are chosen based on the load size and wrapping requirements. For loads that are small, narrower films are suitable. The films are roughly 100 mm in length. For larger loads, broader films, which are approximately 1000 mm wide, are more beneficial.
Length
Standard stretch film roll lengths are around 250 to 3000 meters. Machine stretch films have greater lengths than hand stretch films. This makes them suitable for tasks with high production rates.
Load retention
Load retention refers to how much the film can go back to its original shape after being removed from a wrapped load. A film with higher load retention has greater wrapping tension. Thus, it keeps the load in the same shape even after movements. Films with superior load retention boost stability during shipping.
A1. Most of the stretch films are made of linear low-density polyethylene. People love it because of its strength, elasticity, and transparency.
A2. Clear stretch wrap allows for easy product identification. It, therefore, ensures wrapped items maintain visibility throughout storage and transit.
A3. Machine-wrapped loads have a more uniform film application. This results in better film usage efficiency and further requires less manual labor.
A4. Many stretch films are designed to be recyclable. Some are even made from post-consumed plastic. A few of them are also produced from bioplastics. These options reduce dependency on fossil fuels and lower the plastic waste footprint.
A5. Stretch film acts as a stabilizing agent. It prevents shifting, thus ensuring the load arrives intact and undamaged at its destination.
