Welcome To www.StretchFilm.my
Stretch Film (Hand Roll)
1. Stretchable even longer & stronger almost up to 300%.
2. High stretch capability that guarantees over cost saving of each unit wrapped, the higher stretching capacity, the lower amount of film needed for wrapping. Cost reduction compared to traditional packaging methods.
3. Tear resistance capability, when film is torn, the tear remains and does not get bigger, increased palletizing load stability and tighter wraps. Strong elastic retention to ensure the gripping force on the load is kept constant with time.
4. Physical and practical tested, simulating actual application conditions.
5. Easy handling and use.
6. Protection against dust, water and dirt during transit or storage. Self-Stickled with no glue residue. Proven grades of raw materials used, and condinuous quality inspection.
Stretch film or stretch wrap is a high elongation, polyethylene based film that is used to unitize and protect products during storage and shipment, and highly stretchable plastic film that is wrapped around items. The elastic recovery keeps the items tightly bound. It is frequently used to unitize pallet loads but also may be used for bundling smaller items. In other words, it is used to unitize a number of small, individual items into
larger unit loads (normally on a pallet).
Types of stretch film include bundling stretch film, hand stretch film, extended core stretch film, machine stretch film and static dissipative film.
Stretch film used as primary packaging material for protecting individual products, usually in combination with other packaging materials.
– Specialty Corrugated (Die Cut/Coated)
– Corner Guard/Edge Protector etc.
Stretch Film Benefits
• Labor productivity
• Low supply cost
• Excellent product protection
• Visible performance (can see it work)
• Versatility of sizes - load types
• Unequaled load holding force
• Will not damage or adhere to product
• Can reduce cost of secondary packaging
• Compliments automated handling systems
• Improved warehouse and inventory control
• Reduced freight costs• Keeps products clean & neat
The most common stretch wrap material is linear low-density polyethylene or LLDPE, which is produced by copolymerization of ethylene with alpha-olefins, the most common of which are butene, hexene and octene. The use of higher alpha-olefins (hexene or octene) gives rise to enhanced stretch film characteristics, particularly in respect of elongation at break and puncture resistance. Other types of polyethylene and PVC can also be used. Many films have strong stretching power to about 100 – 300% in use. Once stretched, the elastic recovery is used to keep the load tight. These machines offers safety for the products.
The methods we used to produce stretch film by Cast; the film is passed over cooling rollers. This makes the cooling process quick. The quality is good and more can be produced in an hour which to lower the costs of production and competitive price offer in the market.
Other properties such as break strength, cling, clarity, tear resistance, static discharge, etc. are also important as our major concern.
In pallet unitizing, stretch film wrapping can have several functions: improved stability of products or packages, forming a unit load more efficient handling and storage of unit loads some degree of dust and moisture protection some degree of tamper resistance and resistance to package pilferage. Making sure cartons stay on the pallet is an important consideration in warehouse distribution, especially as the demands for increased throughput continues to rise. Stretch wrapping is the most cost-effective way to keep loads secured, on a pallet.
Categories and sub-categories of stretch wrappers
Manual (or Hand) Wrappers:
Extended Core: An extension of the film's core serves as a handle for wrapping; this type of wrapper offers little stretch control and is hard on hands.
Mechanical Brake: A simple structure supports a film roll and a mechanical brake system provides resistance creating stretch of the film.
Pole Wrappers: Similar to the Mechanical Brake system, but the roll and brake are at the end of an extended pole, creating an ergonomic design which eliminates the need to bend to wrap the bottoms of loads and strain to reach the tops of loads.
Turntable Wrappers: The load to be wrapped sits on a turntable which spins the load relative to the film roll, which is housed in a carriage which can move up and down a fixed "mast". Stretch is achieved by rotating the load at a faster rate than the film is fed.
Orbital Wrappers: The film is housed in a carriage on a vertical ring, the load is fed horizontally through the eye of the rotating ring, applying film to the load. A variation of an orbital stretch wrapper is a horizontal ring system, in which the load remains still while a horizontal ring is rotated around the load and moves up and down vertically relative to the load, similar to a rotary arm stretch wrapper.
Rotary Arm Wrappers: In this system, the load remains still while a rotating arm turns around it wrapping the load. This system is used for light loads or for speeds which would otherwise cause the load to topple due to high rotation speeds.
Automatic wrappers are generally a variant of a semi-automatic system. Automatic wrappers include a conveyor system to automatically load the wrapping machine and automatic systems to apply, seal, and cut the film.
Type of Load (Refer Pic)
• There are two factors which determine load type - weight of the load and uniformity of its surface. In stretch film parlance, load types are distinguished by the first three letters of the alphabet. “A” loads have no irregularities. “B” loads have protrusions up to 3 inches, and “C” loads have protrusions over 3inches.
• Fragile loads less than 1,000 lbs may require a thinner film to avoid crushing.
• Extra heavy loads greater than 2,000 lbs may need a thicker gauge film to provide added strength and holding force.
Other Application Factors
• Mixed Load
Distance / Method Load is Traveling
• Short or long haul
• TL or LTL
Value of Load
Bar Codes / Labels
Stretch Film Key Characteristic
Force to Load
• High Force stretch film is designed to provide high load containment
• Soft stretch film is designed to offer high secondary stretch values
• Commonly available gauges range from .6 mil to 3.0 mil
• Machine film width ranges from 10-70 inches
• Hand film width ranges from 10-18 inches
• Convenience film width ranges from 2-20 inches
Stretch Film Equipment
Type of Equipment
• Machine film stretch levels and RPM will help determine what type of
film is necessary to wrap a load.
- 250% stretch at 30 rpm = High Performace
- 200% stretch at 15 rpm = Moderate Performance
- 150% stretch at 12 rpm = Low Performance
Cast Film characteristics
· Consistent Cling
· More resistance to tearing
· Excellent optics
· Quiet unwind· Consistent film thickness
STRETCH FILM TESTING
1) When the roll carriage is moving downward, place (3) marks with a star wheel on the roll of stretch film.
2) Measure the distance between the 1st and 2nd marks. Measure the distance between the 2nd and 3rd marks.
3) Determine the average of the 2 marks.
4) Subtract 10 from the average and multiply by 10 to determine on-pallet stretch.
Distance between marks 1-2 and 2-3: 32, 34 = average of 33.
33 - 10 x 10 = 230% on-pallet stretch.
Measuring Load Force
1) Wrap pallet
2) Measure 10” from the side of the pallet, 10” down from the top
3) Insert metal cylinder
4) Pull metal cylinder out 3” and measure force
5) Cut film from pallet
6) Weigh film (ounces)
7) Divide the unit cost by the force measurement (pounds)
$.22 unit cost / 22 pounds of force = $.01 per pound load force
Unit Cost Analysis
Old method, Cost to wrap a pallet.
New method, Cost to wrap a pallet at the desired load force.
Manufacturing Process / Inputs
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