STRETCH FILM SUPPLIER stretch film

STRETCH FILM SUPPLIER

stretch film

STRETCH FILM (also known as cling film) has a higher tensile strength, tear strength, and good self-adhesive, so the object can wrap as a whole, scattered to prevent the collapse of transportation. The film has excellent transparency. Nice wrapped objects, and objects can waterproof, dustproof, anti-corruption. The film is widely used in cargo tray packaging, such as electronics, building materials, chemicals, metal products, auto parts, wire and cable, daily necessities, food, paper and other industries tied wrapped packaging. Specifications: machine film width 500mm, manual film width 300mm, 350mm, 450mm, 500mm, thickness 15um-50um. Can cut a variety of online. Viscous sub-sided sticky, double-sided sticky products at hand and machine stretch film stretch film the two series.

Feature: Stretch film against buffer strength, good resistance to puncture anti-tear properties, thin, good cost performance. Has a high tensile strength, tear strength, transparency and good retraction force, 400% pre-stretch ratio can be assembled, waterproof, dustproof, anti-theft scattered, and so on.

 Use: used in pallet wrapping and other wound packages, widely used in foreign trade and exports, bottle Cans, paper, metal appliances, plastics, chemicals, building materials, agricultural products, food and other industries.

LLDPE Stretch Film is mounted film products for industrial use, has high tensile strength, elongation rate, and good self-adhesive, transparent material points higher. For manual stretch film, stretch film machine can also be used, can be widely used in the concentration of various goods packaging.

LLDPE stretch film mainly by the work of several different grades of polyethylene resin mixture out en made with puncture resistant, super-strength high-performance, stacked on pallets of goods on the winding package, the packaging, clean and more stable, more super- Strong waterproof, widely used in foreign trade and exports, paper, metal, plastic, chemical, building materials, food and pharmaceutical industries.

Stretch film,the earliest to PVC for the substrate, DOA role for the production of plasticizers and PVC stretch film from the adhesive. Because of environmental problems, high cost (relative PE ratio of a major unit area of less packaging), and poor tensile reason, when the 1994 and 1995 began producing PE stretch film China progressively be eliminated. PE stretch film with EVA as the first self-adhesive materials, but its high cost, another taste, after the development with the PIB, VLDPE as the self-adhesive materials, the substrate now LLDPE based, including C4, C6, C8, and metallocene PE (MPE).

LLDPE stretch film in the early multi-blown, from the development to single-story, three; now cast LLDPE stretch film production of the main, the process shown below, this is because the production line with a thickness of the cast uniformity, transparency advantages, suitable for high-rate pre-stretching of the requirements. Because single-sided sticky tape can not do, applications are limited. Single, double casting choice of materials is not three-wide tape, the high cost of formula, so is the structure of three-layer co-extruded ideal. High-quality stretch film should be transparent, vertical elongation rate, high yield point, horizontal tear strength, puncture and good performance characteristics.

Stretch film features:

1. Unitization: This is the biggest feature of stretch film packaging. With superior film strength and retraction of the wound, the product tightly fixed to tied into a single unit, so that scattered small pieces as a whole, even under adverse conditions without any loose products and separation, the degree and no sharp the edges and adhesive, so as to avoid injury.

2. Primary Protection: to provide primary protection products, surface protection, in product formed around a very light, protective appearance, so as to achieve dust, oil, moisture-proof, waterproof, anti-theft purposes. Of particular importance is the uniformity of stretch film packaging materials for packaging to the force, were on the items to avoid damage Shouli Bu, which is the traditional packaging (bundling, packaging, packaging tape, etc.) can not be done.

3. Compression fixed: With Stretch retraction after stretching force for winding the product packaging, the formation of a compact, space in the unit as a whole, the product of the tray closely packed together, can effectively prevent the transport process in the mutual dislocation and mobile products, while the tensile force can be adjusted to make hard products close, so tight soft products, especially in the tobacco industry and textile industry has a unique packaging effect.

4. Cost savings of: the use of stretch film for packaging, can effectively reduce the cost, with original box packing stretch film only about 15%, 35% of shrink film, carton packaging by 50%. At the same time can reduce labor intensity and improve packaging efficiency, and packaging grades. To sum up, stretch film very broad areas of application, while many domestic fields has not been involved, has been involved in many areas are not widely used, with the expansion of application fields, stretching will greatly increase the amount of membrane Its market potential is immeasurable. So we need to promote the production and application of stretch film.

PE stretch film and stretch film's description:

PE stretch film (also known as stretch film) has a higher tensile strength, tear strength, and good self-adhesive, so the object can wrap as a whole, scattered to prevent the collapse of transportation. The film has excellent transparency. Nice wrapped objects, and objects can waterproof, dustproof, anti-corruption. The film is widely used in cargo tray packaging, such as electronics, building materials, chemicals, metal products, auto parts, wire and cable, daily necessities, food, paper and other industries tied wrapped packaging. Specifications: machine film width 500mm, manual film width 300mm, 350mm, 450mm, 500mm, thickness 15um-50um. Can cut a variety of online. Viscous sub-sided sticky, double-sided sticky products at hand and machine stretch film stretch film the two series. Features: This product against buffer strength, good resistance to puncture anti-tear properties, thin, good cost performance. Has a high tensile strength, tear strength, transparency and good retraction force, 400% pre-stretch ratio can be assembled, waterproof, dustproof, anti-theft scattered, and so on. Uses: used in pallet wrapping and other wound packages, widely used in foreign trade and exports, bottle Cans, paper, metal appliances, plastics, chemicals, building materials, agricultural products, food and other industries.

PE Stretch Film is mounted film products for industrial use, has high tensile strength, elongation rate, and good self-adhesive, transparent material points higher. For manual stretch film, stretch film machine can also be used, can be widely used in the concentration of various goods packaging. PE stretch film mainly by the work of several different grades of polyethylene resin mixture out en made with puncture resistant, super-strength high-performance, stacked on pallets of goods on the winding package, the packaging, clean and more stable, more super- Strong waterproof, widely used in foreign trade and exports, paper, metal, plastic, chemical, building materials, food and pharmaceutical industries.

LLDPE stretch film: LLDPE stretch film, LLDPE is a high quality to the substrate, do not add high quality with tackifier, the heating, extrusion, casting, and then cooled by the chill roll is made with toughness, high elasticity, anti-tear, high viscosity, the thickness of thin, cold, heat, pressure, dust, water, a single stick and double stick, etc., can save the use of materials, labor-saving , save time, widely used in paper making, logistics, chemicals, plastic raw materials, building materials, food, glass and so on. PE stretch film slitting: LLDPE is the substrate of high quality, do not add high quality with tackifier, the heating, extrusion, casting, and then cooled by chill roll is made with high toughness, high elasticity , anti-tear, high viscosity, the thickness of thin, cold, heat, pressure, dust, water, a single stick and double stick, etc., when in use can save materials, save labor, save time, widely used in the paper, logistics, chemical, plastic raw materials, building materials, food, glass and so on. Stretch Film Stretch Film with film theory super power and retraction of the wound, the product tightly fixed to tied into a single unit, so that scattered small pieces as a whole, even under adverse conditions without any loose products and separation , degree and no sharp edges and sticky, so as to avoid injury. Stretch film can be divided into: PE Stretch Film, PE stretch film, PE stretch film, LLDPE stretch film, PE stretch film slitting, etc.

Use the form of stretch film:

1. Sealed packaging 
The packaging is similar to shrink wrap the film around the tray to tray all wrapped up, and then grab two hot sub-membrane sealing the ends together. This is the first use of stretch film form, and thus the development of more packaging 
2. The full width of packaging 
The packaging requirements wide enough to cover the film tray, tray shape rules, so have to use it for film thickness is 17 ~ 35μm 
3. Manual packaging 
This package is the easiest stretch film packaging a membrane mounted on a rack or by hand, by turning the tray around the tray or film transfer. Mainly used in the wrapped pallet re-packing after damage, and general tray packaging. The packaging was slow, for the film thickness is 15 ~ 20μm; 
4. Stretch film wrapping machine packaging 
This is the most common form of the most widely used packaging machinery, tray rotation or film by the rotation around the tray, the film can be fixed on the bracket up and down. The large packaging capacity, approximately 15 to 18 per hour. Suitable thickness of about 15 ~ 25μm; 
5. Horizontal Packaging Machine 
Unlike other packaging materials by the membrane around the turn, for long goods packaging, such as carpet, sheet metal, fiber, profile, etc.; 
6. Paper tube packaging 
This is the latest use of stretch film, compared to the old-fashioned paper tube packaging stretch film packaging better. Suitable thickness is 30 ~ 120μm; 
7. Small items of packaging 
This is the latest packaging stretch film, not only can reduce material consumption, but also can reduce the storage space the tray, in a foreign country, this package was originally introduced in 1984, just one year after the market had appeared in many of these packages, The packaging has great potential. Suitable thickness of 15 ~ 30μm; 
8. Pipe and cable packaging 
This is a special field of application of stretch film in an example, packaging equipment, production lines installed in the final, fully automatic stretch film can either replace the tape bound material, and can play a protective role. Applicable thickness 15 ~ 30μm.

Stretch wrapped pallets form of organization :
Stretch film packaging are subject to tension, the tensile mechanical packaging tray form of direct tension and pre-stretch. Pre-stretch is divided into two types of pre-stretch rollers, a tension is electric. Directly on pallets and stretch film is stretched between the completion. This method draw ratio is low (about 15% to 20%), if the draw ratio of 55% to 60%, exceeding the yield point of the original film, film width was reduced, and puncture performance is lost, the membrane was easy to break. And in 60% of the stretch rate, tension is still very great, for light goods, is likely to bring the deformation. Pre-stretching is done by the two rollers. The two pre-stretch rollers by the roller gear unit linked together, draw ratio can vary according to the gear ratio, tension generated by the turntable, as tension is generated within a short distance, the friction between the roller and the film big, so wide and indented film, the original film puncture performance is there. No stretching occurs when the actual winding, reducing the sharp edge or corner of the cause of the fracture, which can pre-stretch draw ratio increased to 110%. Power pre-stretch roller tensile pre-tension mechanism and the same, the difference is two-roller driven by the power, the rotation of pallet stretch completely irrelevant. So adaptable, light, heavy, no rules are applicable to the goods, the packaging of low tension, so this method of pre-stretch ratio up to 300%, significantly saving material costs. Suitable thickness of 15 ~ 24μm.

Processing conditions :
Production of the cast long, narrow flow channel, flow speed, the melt temperature range is typically controlled at 250 ℃ ~ 280 ℃, the temperature of casting cooling roll controlled at 20 ℃ ~ 30 ℃, and winding to be low, generally 10kg or less, to facilitate the viscous agent to move out, while reducing the finished membrane stress. 
Control of viscosity :
Good adhesion to the packaging of the goods outside of the film layers from sticking together and bring the firm, sticky, there are two access methods: one is to add in the PIB polymer or parent material; the other is mixing VLDPE . PIB is translucent viscous liquid, the need for special equipment added directly or modify the equipment, generally using PIB masterbatch. PIB's move out of a process, generally three days, also affected by temperature, high temperature adhesive strength; temperature is low, not too sticky, the stretched far less sticky. Storage of finished film and therefore the best at a certain temperature range (recommended storage temperature of 15 ℃ ~ 25 ℃). Mixing VLDPE, sticky bit weak, but there are no special requirements for equipment, viscosity is relatively stable, not subject to time control, but also affected by temperature, air temperature higher than 30 ℃, the relatively sticky, somewhat less than 15 ℃, viscosity can be adhesive layer by adjusting the amount of LLDPE in order to achieve the desired viscosity. Multi-layer co-extruded using this method. 
Control of physical and mechanical properties:
High transparency in favor of the identification of goods; highly conducive to the longitudinal pre-stretching elongation, saving material consumption; good performance and transverse tear strength and puncture films at high draw ratio allowed under the sharp angle of the goods or met edge is not broken; high yield point to packaged goods more tight. Production of the film cast transparent, does not focus on here. C atoms with the number of comonomer materials increase, branch chain length increased, the crystallinity decreased, the resulting copolymers, "wound or kink" effect would increase, so the elongation rate, puncture strength and tear strength are improved. The MPE is the GAO polymer stereoregularity, molecular weight distribution is very narrow, you can precisely control the physical properties of polymers, so there are further improved performance; and because MPE narrow molecular weight distribution, processing, narrow range, processing conditions difficult to control, usually Add 5% LDPE, to reduce the melt viscosity, increasing the film roughness. MPE's prices are high, in order to reduce costs, usually with MPE and C4-LLDPE use, but not all can be associated with C4-LLDPE should have a choice. Machine stretch film use more C6, C8 material, easy to process, can meet a variety of packaging requirements. Hand-packing the draw ratio is low, and more use of C4 material. Density of the material also affects the performance of films. As the density increases, orientation to improve, good flatness, vertical elongation rate, yield strength, but the lateral tear strength, puncture strength and light transmission rate decreased, so the integrated performance of all aspects, often in non-stick Add appropriate amount of medium density layer linear polyethylene (LMDPE). Add LMDPE also reduce the friction coefficient of non-stick layer to prevent adhesion of packed pallets and trays. Chill roll temperature. Chill roll temperature, the yield strength, but the rest of performance degradation, so I usually roll cooling temperature control in the 20 ℃ ~ 30 ℃ appropriate. Cast film line tension of the flatness and winding tension, the use of PIB or parent material as an adhesive layer, also affect the PIB's move to reduce the viscosity of the final film. Tension generally not more than 10kg, is too large residual stress in the film roll, so that elongation decreased performance, easily lead to broken membrane phenomenon. Stretch film stretch film application form wide areas of application, mainly used in conjunction with the tray, the whole set of fragmented commodity packaging, instead of small containers. Because it can reduce the quantities of goods more than 30% the cost of transport packaging, which is widely used in metal, mineral, chemical, pharmaceutical, food, machinery and other products of the whole set of packaging; in the warehouse storage area, greater use abroad stretch film pallet packaging three-dimensional storage to save space and area