CLOTH - TECHNICAL TEXTILE

DLTT provides a range of industrial filter cloths that, due to its variety of composition, can meet all sorts of customer needs. These woven fabrics are used for nearly all kinds of industrial segments, such as solid-liquid separation, dust collection, food and beverage, pharmaceutical-, chemical industry, non-ferrous metallurgy, sugar-refinery and many others. 

We offer woven fabrics made of synthetic fibers, the most common being polyester, polypropylene, aramid, PTFE, polyamide, polyethylene. Depending on the nature of your business, Stainless Steel mesh might also be of interest to you.

To properly suit the needs of different fields, the products can be customized according to the client’s demands, DLTT can even provide professional advice on which option suits your working condition best. Feel free to reach us regarding recommendations or support through our website’s Contact section. 

In order to fit its various purposes, and because of its direct contact with different kinds of solutions, the right pick of the filter material is determinant for the success and efficiency of the filtration process. Starting by understanding the clients process and operating conditions, DLTT helps to select the filter cloth fiber types that suits best the specific characteristics needed for each application. 

Due to different yarn types, woven fabrics can have customized filtering performance. Yarns can be made either from short staple length fibers (spun yarns) or from filament fibers (filament yarns).  

Weaving is controlled by sophisticated, high-speed, computer-controlled looms to create precise thread count each and every time the pattern is manufactured. Different yarn types can also be combined into different weave patterns. The most popular are:

Plain: simple structure where both sides of the fabric have the same appearance and very high retention capacity. 

Twill: diagonal structure where the two sides are not always identical. This pattern shows very good mechanical resistance 

Satin: the two sides are always different and the appearance is smooth and bright. 

Good cake release. Other widely used weave methods are: Herringbone satin, Double layer satin; Double twill; Double plain 

Air permeability: Permeability is the measure of the ability of a porous material to transmit air or fluids, which depends on the porosity of the fabric. The porosity is largely determined by the tightness of the fabric weave, to its geometric structure as well as to the path of streamlines for flow through the structure. The most common measurements for air permeability are L/m2/sec@200pa; L/dm2/min@200pa and m3/m2/min@200pa. 

Weight: Fabric weight is the outcome of how a fabric has been woven, its finish and sometimes the fiber type. The weight of a fabric depends on the thickness of the threads it is made of, the density of the weave, as well as its composition.

Temperature and Chemical properties (Alkali / Acid / Base): In order to maintain the efficiency properties of a synthetic fabric it is important to pick the adequate fiber that matches the filtering process conditions.

Breaking Strength: The breaking strength of the fabric refers to the maximum tensile force with which the sample can be stretched until it breaks. It is one of the main standards for assessing the intrinsic quality of textiles. The measure of the breaking strength of the fabric is used to assess the ability of the fabric to withstand tensile damage.

Elongation: After the liquid has been absorbed, the fiber and yarn increase the diameter and stretch the length of the fiber. This leads to a change in the cloth size, which has serious consequences for the installation of the filter plates. Different cloth materials have different water absorption rates. Elongation is the ability of the fabric to absorb liquid without affecting the filtration system.

Thickness: a fiber is usually much longer than it is thick. As the fiber width is measured in inches, or centimeters, the overall thickness of a mesh is measured in micrometers (μm). 

Thread diameter: The thread diameter affects the amount of open area in a particular cloth, which determines flow rate. Different yarn sizes are specified as a measurement of diameter in micrometers (μm).

Mesh opening: One of the most critical attributes of a fabric, the mesh opening determines the size of the particles it will capture. This attribute is specified in micrometers (μm).

Finishings: During the finishing process, as the fabric feeds through the calender stack, permeability is measured and checked. An analysis of each roll is conducted including weight, thread count and permeability. Final surface finishing and permeability is achieved with high speed calenders which presses the fabric, making the surface smooth and compact, and further setting the cloth with water or oil repellent finishing.

Weaving looms: During the warping process the yarn is pulled from tension controlled creels and wrapped onto warps in preparation for the loom. When properly positioned, the warp yarns are inserted through heddles, which are raised and lowered to create an opening where the fill yarn is inserted in order to create the weave pattern. 

Through laser cutting, the fabric is assembled and then sewn to be transformed into a ready-made product. We provide high precision and quality fabric, so its pattern design is highly reliable. All products provided by DLTT can be produced by top weaving loom companies in the international market. 

Fiberglass filter cloth: Woven separately from other materials and products, fiberglass filter cloth is widely used for industrial dust collection because of its high covering capacity, good air permeability, high filtration efficiency and high heat-resistance. Available with PTFE membrane, acid-resistant, silicon and graphite finish.

Weave: plain, twill, satin.

Fiberglass filter cloth main features are:

- Increases a filtration system capacity by 50-150% without major changes to the dust collectors;

- Increases system cleaning efficiency markedly with the effective increase of bag to bag distance;

Industry segment applications: Pipe Insulation; High Temperature Insulation; Insulation Enhancement; Insulation Rubber Tape; Screen Cloth; Aviation Material; Film Material; 

PTFE High Frequency Substrate.