FZ/T 50010.13-2011Pulp board for viscose fiber. Determination for reaction property (English PDF)

3291.1 Textiles – Terms of Textile Material Properties and Test – Part 1.Fiber

and Yarn, GB/T 3291.3 Textiles – Terms of Textile Material Properties and Test

– Part 3.General, GB/T 4146.1 Textiles – Man-Made Fibers – Part 1.Generic

Names. (see Clause 2 of this Edition; Clause 2 of 1998 Edition);

--- Delete the Clause on Laboratory Atmospheric Conditions (see Clause 3 of 1998

Edition);

--- Add the Clause on Terms and Definitions (see Clause 3 of this Edition);

--- Change the Clause on Reagents into Reagents and Materials; and Change the

"chemically pure reagents" into "analytically pure reagents" (see Clause 5 of this

Edition; Clause 5 of 1998 Edition);

--- Change the Clause on Specimen Preparation into Test General, which is divided

into two parts, the first part is sampling, the second part is test environment;

thereof, change "viscose preparation and determination for reaction property

shall maintain the following conditions including temperature of (20±1) °C,

relative humidity of (65±3) %; temperature on working point of (20±0.5) °C." into

"viscose preparation and determination for reaction property shall maintain the

temperature at (20±2) °C." (see Clause 7 of this Edition; Clause 7 of 1998

Edition);

--- Delete partial contents in the Clause on Viscose Preparation of [the viscose

required to be prepared shall contain cellulose of 3.3%, sodium hydroxide of 13%

(the adding amount of carbon disulfide shall be 44% of the absolute dry mass of

the specimen)]; reserve the clause on specimen mass and viscose preparation;

change the formula (1) (see 8.2, 8.3 of this Edition; 8.2 of 1998 Edition);

--- Change, in viscose preparation, "adding 5mL of carbon disulfide" into "adding

certain volume of carbon disulfide (recommended short-yarn cotton pulp board

Pulp Board for Viscose Fiber

– Determination for Reaction Property

3291.3 and GB/T 4146.1 are applicable to this document.

3.1 Reactivity property

It indicates the reactivity index of the pulp board (cellulose), which is expressed by the

time difference used by the prepared viscose liquid passing through the filter hole with

7.2.2 During the determination of the reaction property, the liquid level shall be kept

uniform (250mm).

7.2.3 The determination of reaction property shall be performed under ventilation

conditions.

8.1 Determination of specimen's analysis moisture

It shall be performed as per the provisions of FZ/T 50010.2.

8.2 Specimen mass

Calculate the specimen mass as per the Formula (1) (the specimen's absolute dry

mass is 14.4g).

Where.

m – mass of required specimen, in g;

W – analysis moisture of specimen through humidifying, in %;

14.4 – specimen's absolute dry mass, in g.

8.3 Viscose preparation

Take the specimen m through humidifying (convert into absolute dry mass of 14.4g,

accurate to 0.01g as per 8.2), place it into 500mL brown jar; add 361mL of sodium

hydroxide solution with temperature (20±0.5) °C, concentration of 13.7%. Install the

stirring rod of the electric stirrer into the bottle; the lower end of the stirring rod shall be

about 0.5cm~1cm away from the bottle bottom; stir the specimen into paste state at

the speed of 3000r/min, and stir for 5min.

Add certain volume of carbon disulfide (recommended the short-yarn cotton pulp board

of 5mL, long-yarn cotton pulp board of 7mL, hemp pulp board of 5mL, wood pulp board

of 8mL, and bamboo pump board of 11mL), tighten the stopper; place the bottle onto

the Kahn oscillator, oscillate for 15min along the bottle axis; then yellowing for 4h on

the yellowing box. Then the required viscose is obtained.

8.4 Determination of reaction property

In the clean and dry stainless steel or plastic tube, the lower end of the tube is equipped

with screw cap and two rubber washers; loosen the screw cap, place the 10000

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