Stretch film is mainly a protective product and can provide surface protection for the product. The product form is very light, to protect against the appearance of dust, oil, and moisture, waterproof, and anti-theft. Stretch packaging protective film can be adjusted at the same time the tension can be made to make the product tightly. Soft products, especially in the tobacco industry and the textile industry, have a unique packaging effect. The following stretch film manufacturers will tell you to buy high-quality stretch film. What are the methods?
First, look at the transparency and measure the tensile strength.
First from the length of the stretch film along the direction of the tear, and then from the horizontal direction of the tear, the stretch of the stretch film with good tensile strength of its impact is strong. Good-quality stretch film stretch rate can reach 100%-300%. The cast production method has developed from single-layer to two-layer and three-layer, and now the cast method is mainly used to produce LLDPE stretch film. This is because cast line production has the advantages of uniform thickness, transparency, etc., which can be applied to the requirements of the high rate of pre-stretching. Due to the single-layer casting not being possible on one side of the sticky, application areas are limited. Single- and double-layer cast in the choice of information is not as wide as three-layer cast, and formula interest is also high, so a three-layer co-extruded structure is still ideal. High-quality stretch film should have high transparency, high longitudinal elongation, a high yield point, high transverse tear strength, and good puncture performance.
Second, measure the thickness, see if the film has small particles, and measure the tensile strength.
Crystal point is a common quality problem of the stretch film material; see whether there are particles on the surface of the stretch film. Crystal point is the stretch film material surface of those small pits, also known as bright spots; it is mainly in the three-layer stretch film material common. The main cause is because of the use of silica gel synthesis; silica gel has mobility; if the surface of the stretch film material encountered some small particles of the extrusion, it would form a crystal point to avoid the crystal point of the method, that is, to protect the surface of the stretch film.
Stretch film packaging enables the packaged items to have uniform pressure, avoiding unevenness leading to damage to the goods, which is a traditional packaging method (bundling, wrapping, taping, etc. packaging can not). Wrap stretch film behavior and retraction, compact, fixed tape can product as a unit, the whole dispersion is small, even in unfavorable environments products do not have any loosening and separation, no sharp edges and sticky to avoid injury.
In addition, there are cast stretch film and blown stretch film.
Cast stretch film
Cast stretch film made through a continuous manufacturing process stands out for its excellent clarity and smooth texture. Cast film is notable for its quiet unwind and excellent tear resistance that maintains excellent load stability. It is ideal for applications that require high clarity and consistent performance while remaining cost-effective and versatile, making it a popular choice across industries.
blown stretch film
In contrast, blown stretch film undergoes a labor-intensive process involving extrusion and cooling and offers higher puncture resistance and strength than cast film. The robustness of blown film makes it ideal for heavy or irregularly shaped loads that require enhanced durability and tear resistance, making it the best choice for challenging packaging scenarios.
XH Champion is a professional stretch film manufacturer and solution provider; solving our customers’ packaging problems is our primary goal. Contact us now to customize your packaging film.
Post time: Sep-12-2024