Single and twisted yarns

Glass fibre yarns are made of E-glass with a thermal resistance of 600°C and HR-glass with a thermal resistance of 800°C, whereas twisted glass fiber yarns are made of both E-glass with a thermal resistance of 600°C and SiO2-glass with a thermal resistance of 1000+°C. Each glass type has its own properties, hence also application areas.

Yarn that consists of 400 to 1,600 whole glass fiber filaments (aka continuous fiberglass threads) is a simple textile product in which the yarns are bound with sizing and the first twist and has a broad application in weaving. The filament diameter is from 6 to 13 µm. The broad selection of yarn types and sizes makes it possible to use them in all various applications.

Twisted yarn is made of single yarn, twisting two or more yarns in the opposite direction and winding it on the bobbins. Technical specifications of twisted yarns are the same as those of single yarns. The twisting process provides for a yarn with a higher tex number and a higher twist, thus improving its technological properties for further textile processing: better tensile strength and friction resistance, better resistance to mechanical damages, etc.

Single and twisted yarns
(E-Glass 600º C)

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The basic raw material of these yarns is alkali-free alumina borosilicate E-glass with a maximum alkali content of < 1.0%. The yarn usually consists of 400-1,600 whole glass fibre threads with a filament diameter of 6, 9, 11, or 13 μm.

Application: making technical and electrical insulation cloths.

Technical data:

  • softening point 830°C;
  • liquidus point 1160°C;
  • melting point 1200°C.

Sizing treatment:   

  • 302P; 305P; 333P - silane sizing;
  • B3/4J - silanised starch sizing.

Parameters: glass fibre yarns are offered on polystyrene flange bobbins (H5, H8 and H9) and on warp beams. Warp beams are 1,000 to 3,200 mm in width.

Designation: e.g. EC9-136 Z28, where:
EC - type (E-glass yarn),
9 - filament diameter in μm,
136 - linear density in tex* (* - the weight of 1000 m of yarn in grams),
Z28 - twist direction and the number of twists per metre.

Single and twisted yarns
(HR-Glass 800º C)

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HR-glass is alkali-free aluminosilicate glass that does not contain boron oxide and fluorine. This glass type could fully substitute E-glass in various aspects. The most important feature of this type of glass is its thermal resistance of up to 800°C.

Advantages of HR glass fibre compared to E-glass:

  • better chemical resistance, particularly in acidic, as well as alkaline and water environments;
  • better thermal resistance;
  • better dielectric properties;
  • equal durability;
  • environmentally friendly glass melting process - does not create dust emissions containing boron oxide.

Single and twisted yarns
(SiO2-Glass 1000º+C)

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We offer twisted yarns with a high SiO2 content (KC) with a thermal resistance of 1000+°C. High-silica twisted yarns are a new-generation heat-resistant material.

Application: broad-spectrum; products can be used in various high-tech fields (such as aviation and space industry, chemical industry, metallurgy, special clothing manufacturing, power production, machine building, etc.) that require heat resistance (up to 1000°C) materials. High-silica materials can be used anywhere where low thermal conductivity, inertness to most chemical reagents, resistance to organic and mineral acids (except hydrofluoric acids and phosphoric acids), weak alkali, water, and high-pressure steam is required.

Shrinkage at 1000°C:

  • up to 12% for thermally non-treated textured yarns.

Parameters: high-silica twisted yarns are delivered on conical plastic bobbins, the weight per bobbin is 3 kg.

Designation: e.g. KC6-90x2s140, where:
KC – type (high-silica twisted fiberglass yarn),
6 - filament diameter in μm,
90 - linear density in tex* (* - the weight of 1000 m of yarn in grams),
x2 - number of yarns,
s140 - twist direction and the number of twists per metre.