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GBZ21212-2007 English PDF

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GBZ21212-2007: Polyester film for membrane switches
Status: Valid
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GB/Z 21212-2007English189 Add to Cart 3 days [Need to translate] Polyester film for membrane switches Valid GB/Z 21212-2007

PDF similar to GBZ21212-2007


Standard similar to GBZ21212-2007

GB/T 20632.3   GB/T 20632.2   GB/T 31034   GB/T 13542.4   GB/T 21218   GB/T 21221   

Basic data

Standard ID GB/Z 21212-2007 (GB/Z21212-2007)
Description (Translated English) Polyester film for membrane switches
Sector / Industry National Standard
Classification of Chinese Standard K15
Classification of International Standard 29.035.99
Word Count Estimation 7,777
Date of Issue 2007-12-03
Date of Implementation 5/20/2008
Regulation (derived from) China National Standard Approval Announcement2007 No.12 (Total No.112)
Issuing agency(ies) Ministry of Health of the People's Republic of China
Summary This standard specifies the requirements for membrane switch with polyester film, test methods, inspection rules, signs, packaging, transport and storage. The technical guidance document applies to the polyethylene terephthalate film was cast and stretched biaxially oriented film obtained for membrane switch and flexible circuit board manufacturing industries.

GBZ21212-2007: Polyester film for membrane switches

---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.
GB /Z 21212-2007 Polyester film for membrane switches ICS 29.035.99 K15 National Standardization Technical Document of the People's Republic of China GB /Z21212-2007 Polyester film for membrane switch Released on.2007-12-03 General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration issued

Foreword

This guidance document refers to the DuPont EL polyester film product standard and GB 12802.2-2004 "electrical insulation film" Part 2. Polyester film for electrical insulation. This guidance technical document was proposed by the China Electrical Equipment Industry Association. This guidance document is under the jurisdiction of the National Technical Committee for Standardization of Insulation Materials (SAC/TC51). This guiding technical document was drafted by. Oriental Insulation Materials Co., Ltd. The main drafters of this guiding technical document. Luo Chunming, Zhao Ping. This guidance document is for the first time. GB /Z21212-2007 Polyester film for membrane switch

1 Scope

This guidance document specifies the requirements, test methods, inspection rules, marking, packaging, transportation and packaging of polyester film for membrane switches. Storage. This guidance document applies to films made from polyethylene terephthalate through cast slab and biaxially oriented stretching. Membrane switch and flexible circuit board manufacturing industry.

2 Normative references

The terms of the following documents are incorporated into the terms of this guidance document by reference to this guidance. Any dated Reference documents, all subsequent amendments (not including errata content) or revisions do not apply to this guidance technical document, however, drums The parties that have reached an agreement under this guidance document will investigate whether the latest versions of these documents are available. Any undated reference The latest version of the document applies to this guidance document. GB/T 13541-1992 Test method for plastic film for electrical (neqIEC 60674-2.1988) GB/T 13542-1992 General requirements for plastic films for electrical purposes (neq IEC 60674-1. 1980) IEC 61074.1999 Determination of melting heat, melting point, crystallization heat and crystallization temperature of electrical insulating materials by differential scanning calorimetry method

3 classification

The film is divided into two models according to its characteristics, as shown in Table 1. Table 1 film model Model characteristics 1 ultra low heat shrinkage, transparent film 2 Ultra-low heat shrinkage, atomized film

4 requirements

4.1 Appearance The film is supplied in rolls, the surface of the film should be smooth and smooth, and there should be no defects such as wrinkles, tears, particles, bubbles, pinholes and foreign matter. The edges should be neat and undamaged. 4.2 Film rolls, joints and dies Film rolls, joints and dies shall comply with the provisions of 4.2, 4.3 and 4.4 of GB/T 13542-1992. 4.3 size 4.3.1 Thickness and tolerance The thickness ranges from 50 μm to 150 μm, and preferred nominal thicknesses are recommended. 75 μm, 100 μm, 125 μm, 150 μm. The thickness tolerance of the film of 100μm and below is ±5% of the nominal thickness, and the thickness tolerance of the film larger than 100μm is the nominal thickness ±4%. 4.3.2 Winding diameter, width and limit deviation The specifications of the roll diameter and width are determined by negotiation between the supplier and the buyer. The recommended width is 500mm and 1000mm. Film can be added according to user requirements GB /Z21212-2007

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