SDM Strength Film - all you need to know

SDM Strength Film known by the processing names Cross-Laminated Films and Strength Films, is a kind of Polyethylene (PE) Cross Laminated Strength Film. Because of proprietary cross-laminated process, SDM Strength Film is very strong and find many application.

Conception of SDM

The SDM means Spiral cut, Double-laminated and Machine direction drawing. It is the processing name for this kind of films.


There is only one molecular orientation for the normal HDPE films. So, along this direction, HDPE films have a bigger tensile strength, but weak properties in the other direction.

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SDM Strength Film is laminated film by ±45°two second drew films. So in every direction of the films, there are strong properties.

Manufacturing Method

The whole process of producing SDM Strength Films consists of some steps: they are film making, spiral cutting and cross laminated. PE as raw material, and blow to be a film with certain thickness by film blowing machine. In order to make the film with maximum molecular orientation in the machine direction, some additional production processes are required to make the film higher mechanical characteristics in machine direction.

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And then, the spiral cutting machine cut into sheet film by 45°angle with the original machine direction.

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The last, coated special glue on the surface of film and cross laminate double-layer in 90°orientation by high-pressure.

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Characteristics & Features

By the processes of film-blowing, and second drawing, the films molecules are rearranged, so that make the film more synclastic molecular arrangement, and more tensile strength accordingly. And the processing of spiral cutting and double-layer-cross laminating(+ - 45°), make the tensile strength in two direction distributed more equality in all direction.

Those processes modified the molecular arrangement and physical structure, and make the SDM Strength Film good tensile and tearing strength, and puncture and weather resistant, thermal dimensional stability and cryogenic flexibility, and difficult to tear as well as break


Civil Engineering & Waterproofing

The major applications of SDM Strength Film are the production of waterproof membrane, roof underlayment, air/vapor barrier and other carrier films for the tapes ;

These waterproof membrane, tapes are produced by coating modified bitumen or adhesive on the carrier film (SDM Strength Film).

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Printing Label/Tag

In the label industry, because of the properties of SDM Strength Film, SDM Strength Film can be used RFID labels, rebar & steel tags, lumber tags, brick tags, cargo tags, banner and sign, etc.

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SDM Strength Film can be used as packing for explosive, timber, mechanical parts, chemicals and textile.


SDM Strength Film is a wonderful invention with a lot of important applications. But for the film to get its well-known properties, manufacturers need to use appropriate raw materials with the appropriate dosage of each material.

Vietnam Hanotech JSC are manufacturing Filler Masterbatch, Color Masterbatch & Anti-UV Masterbatch for the production of SDM Strength Film. Our products are made of high-quality materials (ultrafine CaCO3, high purity pigment, virgin resin) with ideal mixing capacity for each Masterbatch.

Please contact us today for further support and samples!

Billy Le (Sales Executive)

Get In Touch

Tel: +84 2.462.516.683

Fax: +84 2.462.516.685



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Factory: Lot II.4.2 , Thuan Thanh 3 zone, Thuan Thanh District, Bac Ninh Provice, Viet Nam