Double Layer Screen Forming

Category: 2.5 Layer Forming Fabric
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Double Layer Screen Forming
Paper Machine Clothing
Forming Fabric
Forming Wire
Product Manual:Double Layer Screen Forming of Excellent Retention & Dewatering & Life


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Double Layer Screen Forming, 2.5 Layer Forming Fabrics, Excellent Retention ( High Fiber Support Index), Excellent Dewatering (Very Open), And Excellent Life (High Wear Potential)


Made by Jurgens 13m Wide Weaving Looms and Austria Automatic Seaming Machine

The forming section consists of a long moving belt of fine mesh screen supported by rolls or foils. For many decades, this screen belt was made of bronze and called the “wire.” Today it is made of synthetic polymer — primarily polyester monofilament — and is called the forming fabric. Newer machines (gap formers) trap the slurry out of the slice between two forming fabrics. As the forming fabric moves along the forming section, water drainage is assisted by foils. The fiber then passes over the suction boxes to pull more water from the furnish. Still more water is removed at the couch roll just before the sheet leaves the forming section. At this point, the sheet consistency is about 20%.

Dedicated research has produced synthetic forming fabrics that yield improved drainage, higher production and longer life at a lower cost per ton of paper produced.

Keylife’s forming fabrics are available in a wide variety of meshes, depending on the type of paper produced. Coarse mesh fabrics are used to manufacture heavy paper grades such as those used in the production of corrugated boxes. Very fine mesh fabrics are required for lightweight paper, such as writing paper, book paper and magazine paper. The average life span of a forming fabric, depending on the type of paper, is approximately three months.

Keylife 2.5 layer forming fabric is an established double layer forming fabric family with qualities for all paper grades. It is available in 8 and 16 shaft designs with or without extra support strands on the paper side. The excellent raw material, which has the dimensional stability and abrasion resistance, is used to promote increased life potential and reduced energy consumption.

Two and a half layer forming fabric is a 8/16-shed,double and a half layer wire. This wire has an 8-shed weave with additional transverse strands, knows as support strands, on the paper side. With this design, a good sheet support, high evenness and good retention can be provided. At the same time, the wire has 16-shed big span weave on the back side and the bottom weft uses a coarse yarn to improve running life.

This 2.5 layer design brings a high dewatering capacity and stability in both MD and CD.

The two and a half layer forming fabric impresses with its excellent formation and low energy consumption. The user-friendly design facilitates efficient operation.

In the paper machine, fabric and felt merge over the forming roll, compressing the suspension and initiating drainage. The drainage is carried via channels through a de-aeration device into a cyclone system (Vk>1,200 m/min) and then back to the white water tank. In the process, the 2.5 layer forming fabric achieves outstanding formation results.

KEYLIFE is a professional manufacturer of industrial fabrics in China. The plant ranks one of top 5 in the industry in the country, with a registered capital of USD 19 Million and an annual sale over USD 10 Million.

Main products are paper machine clothing and belts, including forming fabrics, woven dryer fabrics,spiral fabrics and filtration belts. All these products are strongly supported by the leading technologies which keep pace with the world.
The company has the latest world-class equipments in its 32000sqm plant, including high speed weaving looms from Germany and UK, leading hot airbox table and hot oil table, and automatic seaming machines from Austria. Maximum fabric size can be 100m long and 12m wide.
The plant is ISO 9001 certified and is the supplier of many big paper mills and famous filtration companies in the world.



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