GB 2696-1987 Technical conditions and classification of jute twisted twine

This standard applies to machine-made twisted jute twine (hereinafter referred to as twisted twine) made of jute and kenaf as the main raw materials. GB 2696-1987 Technical conditions and classification regulations for twisted jute twine GB2696-1987 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Technical requirements and grading stipulation for skeined colour jute threads--Technical requirements and grading stipulation Scope of application
UDC 677.13.062
GB 2696---87
Replaces GB 2696-81
This standard applies to machine-made skeined colour jute threads (hereinafter referred to as skeined colour jute threads) made of jute and kenaf as the main raw materials. 2 Technical conditions
The technical conditions for skeined colour jute threads shall be as specified in Table 1. 2.1
770×3T (1.3pcs/3)
Twisted twine
690×3T (1.45pcs/3)
Twisted twine
625×3T (1.6pcs/3)
Twisted twine
335×3T (3pcs/3)
Twisted twine
Nominal fineness*
Anhydrous count (metric count)
2320 ~ 2420 (0.41 ~ 0.43)
2080 ~ 2170 (0. 46 ~ 0. 48)
1880 ~ 1960 (0.51 ~ 0.53)
1010 ~ 1050 (0.95 ~ 0.99)
Breaking strength, Newton (in grams)
Not less than
240 (24.5)
220 (22.4)
200 (20.4)
100(10.2)
2.2For products not included in 2.1, their technical conditions shall be formulated by both the supplier and the buyer with reference to this standard. 2.3The standard moisture regain of twisted hemp rope is 14%, which is only used for weight conversion. 3Grading regulations
Number of twists/10 cm
3.1Twisted hemp rope is divided into genuine and secondary products. Its grade is evaluated according to the lowest item in the inspection results of 3.3 physical indicators and 3.4 appearance defects of this standard.
3.2 When grading the twisted hemp rope, the physical index is in batches, and the appearance defects are in twists (balls, tubes). 3.3 The physical indexes of the twisted hemp rope are graded according to the provisions of Table 2. The nominal fineness is determined by each manufacturer according to the actual twist shrinkage rate by the following formula. Nominal fineness of twisted hemp rope (special) _ Nominal fineness of single yarn of twisted hemp rope (special) × number of strands (1 round shrinkage rate)
Approved by the Ministry of Textile Industry of the People's Republic of China on November 9, 1987, implemented on April 1, 1988
Fineness deviation rate
Fineness unevenness
10 cm twist deviation
Impurity rate
Breaking strength
GB 2696-87
The appearance defects of twisted hemp rope are graded according to the provisions of Table 3. Table 3
Two strands missing
One strand missing and length not exceeding 1 meter
Two strands more
One strand more and length not exceeding 1 meter
Knots of two strands connected
Authentic product allowable deviation
Not exceeding 8.5%
Not exceeding 1.5%
Not lower than the technical requirements
Average number of authentic products allowed per 100 meters
Not allowed
Not allowed
Note: ① If the knots of the twisted hemp rope are tied with single yarn and the distance between the knots is more than 5 cm, they are not considered as knots. ② The twisted hemp rope should be tied with a woven knot, and the knot should be small and tight. Additional remarks:bZxz.net
This standard is drafted by Zhejiang Hemp Spinning Factory. 16
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