GB/T 14464-2017 English PDF (GBT14464-2017)

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GB/T 14464-2017: Polyester staple fiber
GB/T 14464-2017
Polyester staple fiber
ICS 59.060.20
W52
National Standards of People's Republic of China
Replace GB/T 14464-2008
Polyester staple fiber
2017-12-29 released
2018-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Issued by China National Standardization Administration
Preface
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 14464-2008 "Polyester Staple Fiber". Compared with GB/T 14464-2008, this standard except for editorial changes
The main technical changes are as follows.
--- Normative references.
● Added GB/T 3291.3 Textile Textile Material Performance and Test Terminology Part 3.General; GB/T 4146.1
Textile Chemical Fiber Part 1.Generic Name; GB/T 4146.3 Textile Chemical Fiber Part 3.Inspection
Terminology; GB/T 8170 data rounding rules and the expression and determination of limit values; FZ/T 50027 chemical fiber II
Titanium oxide content test method;
● The expression method and judgment method of GB/T 1250 limit value are deleted; GB/T 4146 textile terminology (chemical fiber
Part); GB/T 14189 fiber grade polyester chips (PET).
---The 3.1 production batch, 3.2 inspection batch, and 3.3 times long fiber content have been deleted from the terms and definitions.
---Classification and marking.
● Cotton type. linear density is 0.8dtex~2.1dtex adjusted to 0.8dtex~< 2.2dtex;
● Medium and long type. linear density is 2.2dtex~3.2dtex adjusted to 2.2dtex~< 3.3dtex.
---skills requirement.
● In the quality difference, “the average actual mass of the batch is not less than the nominal net mass, and the quality of the package
The deviation rate of the nominal net mass of fixed-weight products shall not exceed ±5%";
● The index adjustments of the cotton-type products in Table 1 are as follows. 10% tensile strength superior products are adjusted from ≥2.80cN/dtex to
≥3.00cN/dtex, first-class products are adjusted from ≥2.40cN/dtex to ≥2.60cN/dtex, qualified products are adjusted from ≥2.00cN/dtex
dtex is adjusted to ≥2.30cN/dtex; M1 is the central value of elongation at break, and the cotton type is selected in the range of 20.0%~35.0%
Adjust the cotton type to be selected in the range of 18.0%~35.0%;
● In Table 1, the items and indicators of Puqiang cotton type are deleted.
---In the ex-factory inspection rules, the products that fail to meet the qualified grade are deleted as non-standard products.
---Marking, packaging, transportation, storage.
● Mark and packaging, transportation and storage are combined into one chapter;
● Amend "The product package should be fastened with plastic straps, steel straps or other straps with certain strength" to "The product packaging should be
Use a polypropylene woven cloth covered with a film and fasten it with a packing tape";
● Removed the difference between the quality of each package of non-fixed-weight products and the nominal quality of the same batch of fixed-weight products. It is recommended that the difference should not exceed ±5%.
This standard was proposed by the China National Textile and Apparel Council.
This standard is under the jurisdiction of Shanghai Textile Industry Technical Supervision.
Drafting organizations of this standard. Sinopec Yizheng Chemical Fiber Co., Ltd., Jiangsu Sanfangxiang Group Co., Ltd., Sinopec Shanghai Petroleum
Chemical Co., Ltd., Jiangsu Huaxi Village Co., Ltd. Special Chemical Fiber Factory, Shanghai Textile Industry Technology Supervision Institute, China Chemical Fiber
Industry Association.
The main drafters of this standard. Guan Xiaoyan, Zou Yun, Zhang Lingxia, Yu Xinri, Chen Yuxin, Li Hongjie, Wan Lei.
The previous versions of the standard replaced by this standard are as follows.
---GB/T 14464-1993, GB/T 14464-2008.
Polyester staple fiber
1 Scope
This standard specifies the terms and definitions, classification and marking, technical requirements, test methods, inspection rules and markings, packaging,
Requirements for transportation and storage.
This standard applies to semi-dull or shiny natural polyester staple fibers with a linear density of 0.8dtex~6.0dtex and a circular cross-section.
The type of polyester staple fiber can be used as reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 3291.1 Terminology for performance and test of textile textile materials Part 1.Fiber and yarn
GB/T 3291.3 Terminology for performance and testing of textile materials-Part 3.General
GB/T 4146 (all parts) Textile chemical fiber
GB/T 6503 Test method for moisture regain of chemical fiber
GB/T 6504 Chemical fiber oil content test method
GB/T 8170 Data rounding rules and the expression and judgment of limit values
GB/T 14189 Fiber grade polyester chips (PET)
GB/T 14334 Chemical fiber short fiber sampling method
GB/T 14335 Test method for linear density of short chemical fiber
GB/T 14336 Chemical fiber short fiber length test method
GB/T 14337 Chemical fiber short fiber tensile properties method
GB/T 14338 Test method for crimp performance of short chemical fiber
GB/T 14339 Chemical fiber short fiber defect test method
GB/T 14342 Chemical fiber short fiber specific resistance test method
FZ/T 50004 Polyester staple fiber dry heat shrinkage test method
FZ/T 50027 Chemical fiber titanium dioxide content test method
3 Terms and definitions
The terms and definitions defined in GB/T 3291.1, GB/T 3291.3, GB/T 4146 (all parts), and GB/T 14189 apply to this
file.
4 Classification and identification
4.1 Product Classification
4.1.1 Cotton type. The linear density is 0.8dtex~< 2.2dtex.
4.1.3 Hair type. The linear density is 3.3dtex~6.0dtex.
4.2 Product identification
4.2.1 Product specifications are expressed in terms of nominal fiber density (dtex) and nominal length (mm). For example. 1.33dtex×38mm, of which 1.33dtex
Represents the nominal linear density, 38mm represents the nominal length.
4.2.2 The product identification should contain information such as specifications, categories, product names or batch numbers, which can be effectively distinguished.
5 Technical requirements
5.1 Product classification
Polyester staple fiber products are divided into three grades. excellent, first-class, and qualified.
5.2 Performance items and index values
Product performance items and indicators are shown in Table 1.
5.3 Oil content of polyester staple fiber
Determined by negotiation between the supply and demand parties.
5.4 Quality difference
5.4.1 The deviation rate between the average net mass of the package and the official mass shall not exceed ±0.5%.
5.4.2 The deviation rate between the nominal net mass and the official mass of the package of fixed-weight products does not exceed ±1%, and the average actual mass of the batch is not less than the nominal mass
Yi net quality; the deviation rate of the package quality of non-fixed weight products and the nominal net quality of the same batch of fixed weight products does not exceed ±5%.
6 Test method
6.1 Breaking strength, breaking elongation, 10% fixed elongation strength, coefficient of variation of breaking strength
According to GB/T 14337 regulations.
6.2 Linear density deviation rate
Execute according to GB/T 14335, and execute method A in arbitration.
6.3 Length deviation rate, super long fiber rate, double long fiber content
According to GB/T 14336 regulations.
6.4 Defect content
According to GB/T 14339 regulations.
6.5 Number of crimps, crimp rate
According to GB/T 14338 regulations.
6.6 Dry heat shrinkage at 180℃
According to FZ/T 50004 regulations.
6.7 Specific resistance
According to GB/T 14342 regulations.
6.9 Moisture regain
According to GB/T 6503 regulations.
6.10 Titanium dioxide content
According to FZ/T 50027 regulations.
6.11 Determination of quality differences
6.11.1 Obtain the net mass of the package from the batch of samples according to GB/T 14334.
6.11.2 Obtain the measured moisture regain of laboratory samples according to GB/T 6503.
6.11.3 The calculation formula for the quality difference of N packages is shown in formula (1) ~ formula (4).
7 Inspection rules
7.1 Factory inspection
7.1.1 Inspection items
All items in Table 1 are assessment items, and are tested according to the test methods specified in this standard.
7.1.2 Regulations for batching
Use periodic sampling within a certain range to form the inspection lot number. A production batch can be composed of one inspection lot or several inspections
Batch composition.
7.1.3 Sampling regulations
The sampling of performance items shall be carried out according to the product sampling method stipulated in GB/T 14334.
7.1.4 Comprehensive assessment
The measured value or calculated value of the performance item is compared with the index value in the table according to the rounding value comparison method in GB/T 8170 to check the batch performance
The grade of the lowest item in the project index is determined as the grade of the batch of products.
7.2 Reinspection rules
7.2.1 General
When the batch of products arrives at the buyer, check whether the outer packaging, number of pieces, and quality of the package are consistent with the manifest, if it is affected by transportation, storage, etc.
When the quality is affected, the responsibility should be identified and the responsible party is responsible.
A batch of products can be submitted for re-inspection if there are objections to the quality of the products within three months from the delivery of the consignee. If one third of the batch of products is used
When more than one, you should not apply for re-inspection. The re-inspection can be carried out by either party agreed by both parties. If necessary, the arbitration inspection agency can be asked to comply with the requirements of this standard.
Sampling, inspection, arbitration.
As the quality of this batch of products affects the quality of post-processed products and causes serious losses, both parties should analyze the reasons, clarify responsibilities, and coordinate
商Handle.
7.2.2 Inspection items
Same as 7.1.1.
7.2.3 Sampling regulations
7.2.3.1 The performance item test shall be carried out in accordance with the sampling inspection of the package sampling method in GB/T 14334.
Packages that are wet, contaminated, scratched, or the package has been opened.
7.2.3.2 Double the sample size of the long fiber content and defect content.
7.2.4 Batch regulations
Group the batch according to the original production batch.
7.2.5 Re-inspection evaluation
7.2.5.1 Carry out the grade evaluation according to 7.1.4.If it is higher than or equal to the original grade, it is judged as conforming, and if it is lower than the original grade, it is judged as non-conforming.
7.2.5.3 The deviation rate of the nominal net mass of the package of fixed-weight products and the official mass exceeds ±1%, and the average actual mass of the batch of fixed-weight products is small
For the nominal net mass, the deviation rate of the package quality of the non-fixed-weight product and the nominal net mass of the same batch of fixed-weight products is more than ±5%, and the supply and demand sides
Determined by negotiation.
8 Marking, packaging, transportation and storage
8.1 Logo
8.1.1 The package should be marked with the product name, specification, grade, batch number, net quality, production date, trademark, product according to the specified classification and naming
Standard number, manufacturer name, address, and warning signs for product protection and handling.
8.1.2 The product printed logo should be obvious and not faded to prevent oil and color from penetrating into the bag and polluting the fiber.
8.2 Packaging
8.2.1 The packaging of the product should be kept intact and the fiber should not be exposed. The quality of the packaging should ensure that the fibers are not damaged.
8.2.2 Polyester staple fibers of different specifications, batch numbers and categories should be packaged separately.
8.2.3 The outer packaging of the product should be covered with polypropylene woven cloth and fastened with packaging tape.
8.3 Transportation
During transportation, loading and unloading, it should be implemented in accordance with product warning signs, and corresponding precautions should be taken to prevent products from being damp, exposed, polluted and damaged.
Throwing is strictly prohibited.
8.4 Storage
Packages are stacked in batches and stored in a ventilated, dry and clean warehouse. They should not be near fire and heat sources, and avoid direct sunlight.