[Heat shrinkable film label] PVC, OPS, PET heat shrinkable label film introduction and comparison

[Heat shrinkable film label] Introduction and comparison of PVC, OPS, PET heat shrinkable label film Release time: 2018-08-25 1. When producing heat shrinkable sleeve labels for PVC (polyvinyl chloride film), the film materials used throughout the market are: PVC heat shrinkable film. This kind of film has many advantages such as waterproof, fire-resistant, high transparency, high radiance, and high shrinkage rate. However, when the material is extinguished, it is easy to produce toxic gases, which is not conducive to environmental protection. ☉ The cost is relatively low, but due to the situation, the usage is gradually eliminated, and some areas in Northwest Asia are still in continuous use due to economic constraints. ☉ The general film blowing method produces poor transparency and uneven thickness. 2. BOPS, also referred to as OPS (biaxially oriented polystyrene film) as a new material, OPS heat shrinkable film is a kind of skin packaging material that meets environmental protection requirements, with high strength, high rigidity, good brightness, and shrinkage. It has many advantages, such as high and meeting food hygiene standards. However, because there are not many companies that produce this film on the market today, it has not yet failed to fully meet the market demand for this film. From the perspective of the situation of PVC and the acceptance of PET containers, the output of OPS as a substitute for PVC will increase. ☉ Limited to its physical and chemical properties, there are problems of poor solvent resistance and poor printability, and special ink printing is necessary. ☉ There is a strong tendency of spontaneous shrinkage, and stricter storage conditions (high temperature storage, transportation) are necessary. 3. PET (modified polyester heat-shrinkable film) With the rapid development of PET beverage bottles, various juice beverage bottles such as Coke and Sprite need PETG heat-shrinkable film to match it, because they belong to the polyester category. It is easy to be recycled and used as an internationally recognized environmentally friendly heat shrinkable packaging material. At present, PETG shrink film has become the most aspiring alternative material to replace PVC shrink film in developed countries. Conventional PETG shrinkage rate TD reaches 75%, so it is often used for full-wrapped labels with high shrinkage rate and occasions with environmental protection requirements. It will replace PVC and compete with OPS. PETG heat shrinkable film has excellent physical properties. ☉ Its size is stable and smooth; its transparency and brilliance are high, and it is easy to print; it is resistant to water and oil penetration without sporadic discoloration. ☉ High transverse shrinkage rate, up to 80%. ☉ Low natural shrinkage rate and low cold resistance; non-toxic, odorless and low fever when extinguished. The main performance difference of PET, OPS, PVC label film PET OPS PVC shrinkage rate% max 80%, generally 75% max 80%, generally 70% max 60%, generally 50% Excellent printability, solvent resistance and poor film breaking, no Solvent resistance is easy to give birth to signs of whitening and printing film breaking signs, due to uneven thickness, it can cause signs of poor overprinting. Good crispness and good transparency. General shrinkage temperature 80-100 80-85 90-100 Good high temperature resistance. Density 1.32 1.05 1.38 Commonly used thickness 40μm 40μm 40μm Excellent environmental protection, safe return and poor incineration, it needs to be dispersed with a polyester bottle before being accepted, the exhaust gas is toxic during incineration, PET film performance introduction 1. High shrinkage shrink film☉ Features: High The shrinkage rate and shrinkage stress ☉ the shrinkage rate is more than 70% (90℃/10s) ☉ practically used in containers with a large bottleneck ratio ☉ application scope: outer label of flask, sealing label, etc. 2. Medium shrinkage shrink film ☉ Features: Moderate shrinkage rate, shrinkage rate between 50-70% (90℃/10s) ☉ Wide application range, because of the steep shrinkage curve, it is suitable for most general products ☉ Wide shrinkage processing conditions, especially in the hot air shrinkage channel Good use ☉ Application scope: bottle label, bottle label, sealing label 3. Low shrinkage shrink film ☉ Features: low shrinkage and low residual stress, shrinkage rate is below 50% (90℃/10s) ☉ With low residual stress, it can prevent label deformation during the process of sterilizing beverages☉ The low shrinkage speed provides good conditions for shrinking processing in the hot air shrinking channel. Scope of application: high temperature filling container label 4. Shrink film suitable for tapered containers☉ Features: There is a little shrinkage in the MD direction☉ Generally speaking, shrink labels for tapered containers are coated with a glue layer on the printed layer to prevent movement during shrinkage. Therefore, if the MD shrinkage rate is zero, wrinkles will occur. ☉ Range of use: Shrink labels for tapered containers. 5. Two-way shrink film ☉ Features: Two-way shrinkage. ☉ Due to two-way stretch, in two directions Good mechanical properties ☉ Good heat sealability (heat, high-frequency waves) ☉ Application scope: Multi-pack dry batteries, cover the outer packaging Previous: [Heat shrinkable film label] PVC/PET shrinkable film label printing