GB/T 22890.2-2024 English PDFUS$299.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 22890.2-2024: Leather - Determination of water resistance of flexible leather - Part 2: Repeated angular compression(Maeser) Status: Valid
Basic dataStandard ID: GB/T 22890.2-2024 (GB/T22890.2-2024)Description (Translated English): Leather - Determination of water resistance of flexible leather - Part 2: Repeated angular compression(Maeser) Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Y46 Classification of International Standard: 59.140.30 Word Count Estimation: 14,161 Date of Issue: 2024-03-15 Date of Implementation: 2024-10-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 22890.2-2024: Leather - Determination of water resistance of flexible leather - Part 2: Repeated angular compression(Maeser)---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. CCSY46 National Standards of People's Republic of China Leather-Determination of water resistance of soft leather Part 2.Repeated angular compression method (Messer method) (ISO 5403-2.2011,MOD) Released on 2024-03-15 2024-10-01 Implementation State Administration for Market Regulation The National Standardization Administration issued ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is part 2 of GB/T 22890 "Determination of water resistance of soft leather". GB/T 22890 has been published The following parts. --- Part 1.Repeated linear compression method (penetrometer method); --- Part 2.Repeated angular compression method (Mezer method). This document is modified from ISO 5403-2.2011 "Leather - Determination of water resistance of leather - Part 2.Repeated angular compression method (Mei Zefa)》. Compared with ISO 5403-2.2011, this document has many structural adjustments. A comparison of the structural number changes between the two documents See Appendix A for the table. The technical differences between this document and ISO 5403-2.2011 and their reasons are as follows. --- Added the description of the determination of water absorption of the sample in the "Principle" (see Chapter 4), which corresponds to the standard content; --- Changed the dimension marking in Figure 1 (see Figure 1) to make it consistent with the text description; --- Adjust the description of the specimen size and V-shaped fixture to the note of "die knife" (see 5.2), which conforms to the writing practice of my country's standards Habit, easy to understand; --- Regarding the requirements for die cutter and specimen air conditioning, the normative reference QB/T 2707 replaces ISO 2419 (see 5.2 and 6.3) to adapt to my country's technical conditions and facilitate use; --- Regarding the requirements for test water, the normative reference GB/T 6682 replaces ISO 3696.1987 (see 5.3) to adapt to our The technical conditions of the country are convenient for use; --- Adjust the notes on cleaning agents to the corresponding text (see 5.6) to conform to Chinese customs and facilitate understanding; --- Changed the requirements for sandpaper, and deleted the description of its type regulations in foreign regions (see 5.7), which does not affect the understanding and use; --- Changed the accuracy requirements for analytical balances (see 5.9) to be consistent with relevant standards; --- Regarding the requirements for sampling locations, the normative reference GB/T 39364 replaces ISO 2418 (see 6.1 and 10 Chapter) to adapt to my country's technical conditions and facilitate use; --- Added provisions for sampling of non-standard parts (see 6.1) to meet the needs of daily testing; --- Changed the relevant description of the sample marking direction (see 6.2) to facilitate the understanding of the standard; --- Increased the accuracy requirements for sample weighing operations (see 6.3) to make the test results more accurate; --- Changed the description of the friction direction of sandpaper on the specimen (see Chapter 7) to avoid ambiguity and facilitate understanding; --- Adjust the explanation of friction or folding treatment in Chapter 6 to Note (see Chapter 7), which is in line with the standard practice of my country and convenient for understand; --- Changed the weighing accuracy of the sample when measuring water absorption (see 8.16) to be consistent with the relevant standards; --- Added the way to express the permeability results when the penetration occurs during the inspection interval (see 9.2) for easier understanding. The following editorial changes were made to this document. --- The description of the testing machine is changed to a list form; --- The description of the electronic detection system is changed to a list form; --- ISO 5403-1 and ISO 5402-1 were replaced by informative references GB/T 22890.1 and QB/T 2714 respectively. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by China Light Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Leather Industry (SAC/TC252). This document was drafted by. Dongguan Weiside Technology Development Co., Ltd., Shaanxi University of Science and Technology, Lulian New Materials Group Co., Ltd., Guangdong Wanlima Industrial Co., Ltd., China Leather and Footwear Industry Research Institute (Jinjiang) Co., Ltd., Topscore Fashion Co., Ltd., Jinjiang Dongyi Shoes Co., Ltd., China Leather Shoemaking Research Institute Co., Ltd., and China Light Industry Inspection and Certification Co., Ltd. The main drafters of this document are. Shi Chuanjin, Qiang Taotao, Cao Wenkui, Zhang Wenfu, Shen Yimin, Ni Jianming, Dai Ziqiang, Bu Qiaoqiao, Ren Keshuai.IntroductionIn the leather production process, scientific waterproofing of leather can effectively improve the quality of leather and extend the service life of leather. At this stage, the waterproof performance of leather has been regarded as an important practical data indicator and has received widespread attention from all walks of life. In order to provide a basis for the determination of the waterproof performance of soft leather, it is intended to consist of two parts. --- Part 1.Repeated Linear Compression Method (Penetometer Method). The purpose is to establish the method for determining the resistance of soft leather to water by means of compression bending. Test methods for water properties. --- Part 2.Repeated angular compression method (Mezer method). The purpose is to establish the method for determining the water resistance of soft leather by folding bending. Performance test methods. Since leather is in motion during normal use and wearing, the testing process of leather waterproof performance is also carried out under simulated motion conditions. At present, the waterproof performance of soft leather in my country is mainly determined by the penetrometer method, that is, by repeatedly measuring the water resistance of the leather. The compression method is used to measure the dynamic waterproof performance of soft leather. ISO 5403-2.2011 was published to test the dynamic water resistance of soft leather by repeated angular compression. The test provides a new method, but there is no relevant standard in my country. In view of this, it is necessary to transform it to adapt to the domestic and foreign New changes in products to meet new requirements for testing of different types of products, improve consistency with international standards, and ensure standards and industry development Coordinate. Leather-Determination of water resistance of soft leather Part 2.Repeated angular compression method (Messer method)1 ScopeThis document describes the determination of the dynamic water resistance of leather by the repeated angular compression method using a Maze-type testing machine (optionally with an electronic detection system). test method. This document is applicable to the determination of the waterproof properties of various types of soft leather (especially soft leather for shoes).2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 6682 Specifications and test methods for water used in analytical laboratories (GB/T 6682-2008, ISO 3696.1987, MOD) GB/T 39364 Sampling locations for chemical, physical, mechanical and colour fastness tests on leather (GB/T 39364-2020, ISO 2418. 2017,MOD) QB/T 2707 Preparation and conditioning of leather physical and mechanical test specimens (QB/T 2707-2018, ISO 2419.2012, MOD)3 Terms and definitionsThere are no terms or definitions that require definition in this document.4 PrincipleFold the square leather sample and fix it in two V-shaped clamps with both ends closed, so that the sample forms a groove. The folded groove is immersed in water, and the V-shaped clamp at one end is vibrated at a constant rate to make the sample bend repeatedly. When there is any sign of water seepage, stop the test and record the vibration times of the mobile clamp at this time. Water seepage detection can also be performed through the electronic detection system. The water absorption of the sample (measured in mass fraction) can also be determined. Note. This method uses folding bending, while GB/T 22890.1 uses compression bending. Since the two test methods belong to different bending types, the test There is no comparability between the results. 5 Equipment, reagents and materials 5.1 Maze-type testing machine, with one or more pairs of V-shaped clamps, the spacing between the clamps is (63 ± 3) mm, fixed on the same horizontal line It is used to clamp the specimen, and its main components are shown below. ---V-shaped clamp, should include the following parts. ● The outer part is composed of a "V"-shaped part with an inner angle of (31±1)° and an inner curvature radius of (7.5±0.5) mm. The exterior of the piece is not sealed and waterproof; ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 22890.2-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 22890.2-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 22890.2-2024_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 22890.2-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. |
