Cross-linked film POF shrink film
POF cross-linked membrane
Multi-layer co-extrusion cross-linked shrink film is a new type of high shrinkage biaxially oriented shrink film developed on the basis of POF shrink film. Cross-linking occurs between the two membranes, so that the molecules are transformed from linear chain structures to network structures, thereby changing the physical and mechanical properties of the product. In the production of cross-linked films, different formulation designs and cross-linking degree control can be used to obtain different performance requirements. products, adapt to different packaging equipment and product packaging.
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Multi-layer co-extrusionCross-linked shrink filmIt is a new type of biaxially stretched shrink film with high shrinkage rate developed on the basis of POF shrink film. It is a multi-layer co-extruded PE shrink film through high-voltage electron beam radiation to cross-link the molecules of PE, so that the molecules are composed of The linear chain structure is transformed into a network structure, thereby changing the physical and mechanical properties of the product. In the production of cross-linked films, products with different performance requirements can be obtained through different formulation designs and cross-linking degree control, which are suitable for different packaging equipment. and product packaging.
The most common form of crosslinking used in flexible packaging materials is radiation crosslinking. Radiation crosslinking uses electron beams that generate high-energy B-rays. During the irradiation process, the different bonds within the film are cross-linked together.
- Enhanced Puncture Resistance - Cross-linking of the polymer increases puncture resistance, allowing users to use thinner films while still achieving the same strength. Thinner films have several advantages, the main one being cost. Thinner shrink films also provide better clarity, faster sealing and faster shrinkage.
- Higher Seal Strength - The weakest point of shrink wrap is the seal seam. Standard shrink films do not achieve the same seal strength as cross-linked shrink films. A stronger seal reduces damaged packaging and ensures customers are buying tamper-proof products.
- Low Residue - Shrink wrap leaves residue on seal lines or scrapers over time. Residual residues lead to the need to replace the sealing line and blade. For fully automatic machines that make thousands of seals per day, residue reduction is ideal for saving time and reducing the number of replacement seal sheets.
- Higher Clarity - The ability to use a thinner film of equal strength improves shrink film clarity. Radiation cross-linked shrink films also have less haze for improved clarity.
- The shrinkage rate of the cross-linked film is higher than that of the POF film (over 70% in both directions, and 60% for the POF film), and the shrinkage temperature is reduced
- Compared with POF film, it has higher heat sealing strength and wider thermal temperature range.
- After the cross-linked film is packaged, the film surface friction does not exist the delamination problem that POF film is prone to in this case.
- The reduction of natural shrinkage rate during aging treatment and storage of cross-linked film is lower than that of POF film.
- The thickness uniformity of the cross-linked film is better than that of the non-cross-linked film.
- The stiffness and surface hardness of the cross-linked film are increased, and the surface is resistant to mechanical scratches.
- Using special formulations and process control parameters, a cross-linked shrink film with high shrinkage rate and low shrink force can be obtained, but POF film cannot.
- Since the initial shrinkage temperature of the cross-linked film is lowered, the shrinkage time is increased to a certain extent during the product packaging process, which eases the shrinkage process and reduces the chance of deformation and damage of the packaged material.
High Speed Shrink Wrapper - Fully automatic and semi-automatic shrink wrapping machines that pack thousands of products per day are ideal for cross-linking shrink films. For fully automatic machines, cross-linked polyolefin shrink film will greatly reduce the difficulty
Lightweight Products - For lightweight products weighing up to a few ounces, a cross-linked shrink film can be used. The lighter 12-micron cross-linked shrink film can provide lower professional packaging costs than standard 15-micron polyolefin shrink films.
Heavy Product - 25 micron cross-linked shrink film is stronger and provides higher seal strength than standard 25 micron shrink film. Standard 25 micron shrink film is usually not enough to withstand heavier products. Instead of polyethylene shrink film, try a cross-linked 25-micron polyolefin film.
Products with Sharp Edges - Due to the increased strength of the cross-linked shrink film, it is often a better choice for products with sharp edges and corners. Cross-linked films can help ensure products reach customers without tampering.
