GB/T 7690.4-2013 English PDF

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GB/T 7690.4-2013: Reinforcements -- Test method for yarns -- Part 4: Determination of stiffness
Status: Valid

GB/T 7690.4: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7690.4-2013	139	Add to Cart	3 days	Reinforcements -- Test method for yarns -- Part 4: Determination of stiffness	Valid
GB/T 7690.4-2001	199	Add to Cart	2 days	Reinforcements Test method for yarns -- Part 4: Determination of stiffness	Obsolete
GB/T 7690.4-1989	RFQ	ASK	3 days	Textile glass--Rovings--Determination of stiffness	Obsolete

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GB/T 6006.2   GB/T 9914.1   GB/T 7689.5   GB/T 7690.3   GB/T 7690.6   GB/T 7690.2   

Basic data

Standard ID: GB/T 7690.4-2013 (GB/T7690.4-2013)
Description (Translated English): Reinforcements -- Test method for yarns -- Part 4: Determination of stiffness
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q36
Classification of International Standard: 59.100.10
Word Count Estimation: 6,682
Older Standard (superseded by this standard): GB/T 7690.4-2001
Quoted Standard: ISO 291
Adopted Standard: ISO 3375-2009; MOD
Regulation (derived from): National Standards Bulletin No. 18 of 2013
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies: roving stiffness determination. This standard applies to: all kinds of reinforcements rovings, does not apply to the structure of the yarn twist.

GB/T 7690.4-2013: Reinforcements -- Test method for yarns -- Part 4: Determination of stiffness

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Reinforcements Test method for yarns Part 4. Determination of stiffness ICS 59.100.10 Q36 National Standards of People's Republic of China Replacing GB/T 7690.4-2001 Test method for yarns reinforced Determination of stiffness. Part 4 (ISO 3375.2009, Textileglass-Determinationofstiffnessofrovings, MOD) Issued on. 2013-09-18 2014-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 7690 "Test method for yarns enhanced" is divided into six sections. --- Part 1. Determination of linear density; --- Part 2. Determination of twist; --- Part 3. Glass fiber breaking force and elongation measurement; --- Part 4. Determination of stiffness; --- Part 5. Determination of glass fiber diameter of the fiber; --- Part 6. Determination of twist balance index. This section GB/T 47690 Part of. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 7690.4-2001 "enhanced method for yarns Part 4. Determination of stiffness", and GB/T 7690.4-2001 compared to, in addition to editorial changes outside the main technical changes are as follows. --- Remove the "Normative references" in the GB/T 18374-2001, increase the ISO 291 (see Chapter 2, 2001 edition of chapter 2); --- Remove the "Definitions" chapter (see Chapter 3 of the 2001 edition); --- Sample time from the humidity of at least at least 16h to 6h (see Chapter 5, Chapter 6, 2001 Edition). This section uses redrafted law revision using ISO 3375.2009 "Determination of the textile glass rovings stiffness." This portion ISO 3375.2009 is the main technical difference. for expanding the range of products made of glass fiber reinforced materials roving to roving. This part made the following editorial changes. --- Modify the standard name. Consistency correspondence between this part of international documents and normative references of our files are as follows. --- GB/T 2918-1998 plastic sample conditioning and testing of the standard environment (ISO 291.1997, IDT). This part of the National Standardization Technical Committee fiberglass (SAC/TC245) centralized. This section is responsible for drafting. Nanjing Fiberglass Research and Design Institute Limited, the national glass fiber product quality supervision and inspection center. The main drafters of this section. Huang Ying, Yang Chunying, Wang Yumei, Madan, Shi Zhuo, Hao Zheng Tao. This standard replaces the standards previously issued as follows. --- GB/T 7690.4-1989, GB/T 7690.4-2001. Test method for yarns reinforced Determination of stiffness. Part 4

1 Scope

GB/T 7690 provisions of this part of the determination of roving stiffness. This method is applicable to all types of reinforcing material roving, does not apply to structural yarn twist.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. ISO 291 environmental standard plastic sample conditioning and testing (Plastics-Standardatmospheresfor conditioningandtesting) Principle 3 The specimen length at which point hung up, measuring the distance between two specified points under suspension suspension distance between the end of the sample.

4 Instrument

4.1 roving unwinding control device (see Figure 1). 4.2 roving stiffness tester. Circular cross-section stainless steel hook for the suspension point, there is a sliding scale under 60mm at the suspension point, see figure 2. ......

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