Paper processing - Import export

Sodium sulfate (Na2SO4), sodium sulphate or sulfate of soda is the inorganic compound with formula Na2SO4 as well as several related hydrates, white solid and highly soluble in water It is mainly used as a filler in the manufacture of powdered home laundry detergents and in the Kraft process of paper pulping for making highly alkaline sulfides Applications: As filler in powdered home laundry detergents In the Kraft process for the manufacture of wood pulp As a fining agent, to help remove small air bubbles from molten glass To help levelling in textile industry As a diluent for food colours As a heat storage in in some applications Properties: CAS Number 7757-82-6 Chemical formula Na2SO4 Molar mass 142.04 g/mol (anhydrous) Appearance white crystalline solid hygroscopic Odor odorless Density 2.664 g/cm3 (anhydrous) Melting point 884 °C (anhydrous) Boiling point 1,429 °C (anhydrous) Solubility in water 4.76 g/100 mL @0 °C 28.1 g/100 mL @25 °C 42.

Kraft paper or kraft is paper or paperboard (cardboard) produced from chemical pulp produced in the kraft process Sack kraft paper is a porous kraft paper with high elasticity and high tear resistance, designed for packaging products with high demands for strength and durability Kraft pulp is darker than other wood pulps, but it can be bleached to make very white pulp Fully bleached kraft pulp is used to make high quality paper where strength, whiteness, and resistance to yellowing are important Applications: Kraft paper bags Plastic-hazard-free paper in paper sacks for cement, food, chemicals, consumer goods, flour bags Electrical insulation in large oil-filled transformers Paper grocery bags, multiwall sacks, envelopes and other packaging An inexpensive material for lining particle boards Properties: CAS Number 65996-61-4 Grammage (GSM) range 40-135 g/m2 Appearance poly coated natural kraft paper Color brown Odor none Auto ignition temperature 232-300°C