標準編號:	GB/T 42999-2023
中文名稱:	家用紡織品 織物遮光性的測定 照度計法
英文名稱:	Home textiles—Determination of the light blocking effect of fabric—Illuminometer method
中標分類:	W55    紡織制品綜合
行業(yè)分類:	GB    國家標準
ICS分類:	59.080.30 59.080.30    紡織物 59.080.30
發(fā)布機構:	國家市場監(jiān)督管理總局 國家標準化管理委員會
發(fā)布日期:	2023-09-07
實施日期:	2024-4-1
標準狀態(tài):	to be valid
翻譯語言:	英文
文件格式:	PDF
中文字符數(shù):	11000 字
翻譯價格(元):	770.0
交付時間:	付款后 1~3 個工作日

Foreword This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by the China National Textile and Apparel Council. This document is under the jurisdiction of the National Technical Committee on Textiles of Standardization Administration of China (SAC/TC 302). Home textiles - Determination of the light blocking effect of fabric - Illuminometer method 1 Scope This document describes the test method for the determination of the light blocking effect of fabric by an illuminometer. This document applies to various textiles and related products. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 6529 Textiles - Standard atmospheres for conditioning and testing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 light blocking effect ability of textiles to block light transmission Note: It is expressed in terms of light blocking rate. 3.2 illuminance quotient of the luminous flux incident on an element containing the point divided by the area of the element Note: The unit is lux (lx). [Source: GB 50034-2013, 2.0.6, modified] 4 Principle The stable light with certain intensity is irradiated on the surface of the sample, and the illumination after the light passes through the sample is measured and compared with the illumination without the sample. The light blocking effect of the fabric is characterized by calculating the light blocking rate of the sample.

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Test method 6 Test report Bibliography

ICS 59.080.30 CCS W 55 中華人民共和國國家標準 GB/T 42999-2023 家用紡織品 織物遮光性的測定 照度計法 Home textiles - Determination of the light blocking effect of fabric - Illuminometer method 2023-09-07 發(fā)布 2024-04-01 實施 國家市場監(jiān)督管理總局 國家標準化管理委員會 發(fā)布 目次 前言 3 1 范圍 4 2 規(guī)范性引用文件 4 3 術語和定義 4 4 原理 4 5 試驗方法 5 6 試驗報告 5 參考文獻 5 前言 本文件按照GB/T 1.1—2020《標準化工作導則 第1部分：標準化文件的結(jié)構和起草規(guī)則》的規(guī)定起草。 請注意本文件的某些內(nèi)容可能涉及專利.本文件的發(fā)布機構不承擔識別專利的責任。 本文件由中國紡織工業(yè)聯(lián)合會提出。 本文件由全國家用紡織品標準化技術委員會(SAC/TC 302)歸口。 家用紡織品 織物遮光性的測定 照度計法 1 范圍 本文件描述了利用照度計測定織物遮光性的試驗方法。 本文件適用于家用紡織品織物及其制品。 2 規(guī)范性引用文件 下列文件中的內(nèi)容通過文中的規(guī)范性引用而構成本文件必不可少的條款。其中，注日期的引用文件，僅該日期對應的版本適用于本文件；不注日期的引用文件，其最新版本（包括所有的修改單）適用于本文件。 GB/T 6529 紡織品調(diào)濕和試驗用標準大氣 3 術語和定義 下列術語和定義適用于本文件。 3.1 遮光性 light blocking effect 紡織品阻止光線透過的性能。 注：以遮光率表示。 3.2 光照度 illuminance 入射在包含該點的面元上的光通量除以該面元面積所得之商。 注：單位為勒克斯（lx）。 ［來源：GB 50034—2013,2.0.6，有修改］ 4 原理 將穩(wěn)定且具有一定強度的光照射在試樣表面，測量光透過試樣后的光照度，并與無試樣時的光照度進行對比，通過計算試樣的遮光率來表征織物的遮光性。