GB/T 24797.1-2009 English PDF

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GB/T 24797.1-2009: Film for wrapping rubber bales -- Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 24797.1-2009	114	Add to Cart	3 days	Film for wrapping rubber bales -- Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR)	Valid

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Basic data

Standard ID: GB/T 24797.1-2009 (GB/T24797.1-2009)
Description (Translated English): Film for wrapping rubber bales -- Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G35
Classification of International Standard: 83.060
Word Count Estimation: 6,612
Date of Issue: 2009-12-15
Date of Implementation: 2010-06-01
Quoted Standard: GB/T 1633-2000; GB/T 19466.3-2004; GB/T 20220-2006
Adopted Standard: ISO 20299-1-2006, IDT
Regulation (derived from): National Standard Approval Announcement 2009 No.15 (Total No.155)
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 the physical characteristics of packaging materials and synthetic rubber used generic non- peelable film. This is to ensure that the rubber film during storage, the bales can be separated from each pixel to each other do not dry even alone. This section applies to styrene-butadiene rubber and butadiene rubber like. Some applications or processing methods required to remove the film, not for the depression of peelable type of film.

GB/T 24797.1-2009: Film for wrapping rubber bales -- Part 1: Butadiene rubber (BR) and styrene-butadiene rubber (SBR)

---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.
Film for wrapping rubber bales-Part 1. Butadiene rubber (BR) and styrene-butadiene rubber (SBR) ICS 83.060 G35 National Standards of People's Republic of China GB/T 24797.1-2009/ISO 20299-1.2006 Rubber packaging film Part 1. Butadiene rubber (BR) and styrene - Butadiene rubber (SBR) (ISO 20299-1.2006, IDT) Posted 2009-12-15 2010-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 24797 "rubber packaging film" is divided into three parts. --- Part 1. Butadiene rubber (BR) and styrene - butadiene rubber (SBR); --- Part 2. natural rubber; --- Part 3. an ethylene - propylene - diene rubber (EPDM), acrylonitrile - butadiene rubber (NBR), hydrogenated acrylonitrile - butadiene rubber Rubber (HNBR), a vinyl acrylic rubber (AEM), acrylate rubber (ACM). This section GB/T Part of 124,797. This section is equivalent international standards ISO 20299-1.2006 "Rubber packaging films - Part 1. Butadiene rubber (BR) and styrene - Butadiene rubber (SBR) "(in English). For ease of use, this section made the following changes. --- Delete foreword international standards; --- This section Normative references to our current national standards, the technical content of the corresponding international standards; --- According to the Chinese language and customs, the standard text in the editorial changes. This part is proposed by the China Petroleum and Chemical Industry Association. This part of the National Standardization Technical Committee rubber and rubber products, synthetic rubber division Technical Committee (SAC/TC35 / SC6). This section drafted by. China National Petroleum Chemical Research Institute Co., Ltd. Lanzhou Chemical Research Center. The main drafters of this section. Sun Lijun, Wang Chunlong, Wei Yuli, Fang Fang, Chen Jiyuan leopard. GB/T 24797.1-2009/ISO 20299-1.2006

Introduction

Most common synthetic rubber is made of a rubber compound after drying, briquetting made compact rubber temperature is still around after 60 ℃, rubber Block coverage in automated packaging films and packaging procedures. Packaging film should have sufficient strength to withstand the forces generated by the packaging process. During storage, the rubber will be cold, packaging The film should be able to withstand the pressures generated by the damage will result if the film and the rubber outer adhesions. The purpose of the packaging film between the bag and the rubber bag at all times in a separated state, so that can be easily from the package Remove installed use. Since the packaging film strip both difficult and uneconomical from a rubber on each package, so the rubber mixing process in this package The film should be able to disperse in rubber, which requires less than the melting point of the packaging film must be reached during the mixing temperature is usually 120 ℃ ~ 160 ℃. Not yet a suitable method for the direct measurement dispersion. If the mill mixing or kneading cycle process can not achieve the desired dispersion temperature, should be considered stripped from the rubber bag or film To use a lower melting point of packaging films. GB/T 24797.1-2009/ISO 20299-1.2006 Rubber packaging film Part 1. Butadiene rubber (BR) and styrene - Butadiene rubber (SBR) Warning --- the use of this standard should be familiar with general laboratory operations. This standard does not use security issues that may arise Make any statements. Responsibility of the user to establish appropriate safety and health mechanisms and to ensure that countries with formal laboratory conditions.

1 Scope

This section provides the physical characteristics of packaging materials and synthetic rubber used for general non-peel-off film. The film is to ensure oak Gum during storage, can be separated from each rubber package alone does not stick to each other. This section applies to a styrene - butadiene rubber (SBR) and butadiene rubber (BR). Some applications or processing methods require removal of the film, not the film for this section can be exfoliated.

2 Normative references

The following documents contain provisions which, through reference GB/T 24797 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 1633-2000 thermoplastics Vicat softening temperature (VST) Determination (idtISO 306.1994) GB/T 19466.3-2004 plastic differential scanning calorimetry (DSC) - Part 3. melting and crystallization temperature and enthalpy determination (ISO 11357-3.1999, IDT) GB/T 20220-2006 plastic film and sheeting average sample thickness, volume average mass per unit area and thickness measurement Weighing France (weighing thickness) (ISO 4591.1992, IDT)

3 Materials

Packaging film should be prepared by one of the following materials. --- Low-density polyethylene (of LDPE); --- Low-density polyethylene and an ethylene - vinyl acetate polymer (EVAC,) blend; --- Suitable specifications EVAC. Note. The film may be present in an antioxidant, a slip agent and a release agent.

4 Physical characteristics

4.1 specimen thickness According to GB/T 20220-2006 weighing method for the determination of the thickness of the film should be between 0.035mm ~ 0.065mm. 4.2 Thermal Performance 4.2.1 Summary Generally meet the following requirements can be one of two kinds of thermal performance. 4.2.2 Vicat softening temperature According to GB/T 1633-2000 Determination Method A50, Vicat softening temperature should be less than or equal to 95 ℃. 4.2.3 Analysis of differential scanning calorimetry According to GB/T 19466.3-2004 measured peak melting temperature should be lower than 113 ℃ (Vicat softening temperature + 18 ℃). GB/T 24797.1-2009/ISO 20299-1.2006 ......

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