Perforated Release Film

What is the function of perforated film in the laminate structure?

Perforated film made from HDPE plays a key role in vacuum infusion processes as a separating layer between the laminate and resin absorber fabric. It allows for the controlled drainage of excess resin through defined perforation patterns, without bonding the bleeder fabric to the part. The hole types (e.g. micro-perforation at 30 g/m², P1 hole pattern at 44 g/m²) influence the resin flow direction and rate, helping to maintain a consistent surface finish. This results in a clean separation within the consumable stack, facilitating post-process handling and removal.

Which variants are available in the product range?

HP-Textiles offers several perforated film variants:
The HP-RF30/130 (30 g/m²) features a micro-perforated pattern, ideal for more delicate laminations, while the HP-RF44/100 and HP-RF44/156 (each 44 g/m²) come with a more robust P1 perforation, suited for higher resin volumes and larger parts. Additionally, the Triplex Mesh products HP-TX275/152 and HP-TX280/150 combine peel ply, perforated film, and breather mesh in a single material – ideal for streamlining lay-up processes and reducing labor time. The selection depends on the desired resin flow, part geometry, and overall laminate configuration.

How is perforated release film applied during processing?

The film is placed directly on top of the laminate, followed by a layer of resin absorber or breather mesh. The perforation pattern determines the volume and speed of resin flow into the upper consumable layers. When using Triplex Mesh, there is no need for separate peel ply, perforated film, or breather – all functions are integrated into one composite material. This configuration ensures controlled resin movement, prevents resin pooling, and supports a uniform laminate structure. The film's non-adhesive surface also enables clean removal after curing.

What are typical applications for perforated release film?

Perforated release films and Triplex Mesh are used in vacuum infusion processing of GFRP and CFRP parts. Common applications include mold making, lightweight composite construction, as well as model and prototype fabrication. These materials provide a controlled resin flow and simplify the consumable lay-up structure. Triplex Mesh solutions offer a compact and time-saving alternative by combining multiple functions in one material. Depending on part size, resin type, and process requirements, the appropriate perforated film variant can be selected for use.