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Test for the cure level of compound latex
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Basic data
| Standard ID | GB/T 23655-2009 (GB/T23655-2009) |
| Description (Translated English) | Test for the cure level of compound latex |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | G40 |
| Classification of International Standard | 83.140.99 |
| Word Count Estimation | 8,887 |
| Date of Issue | 2009-04-24 |
| Date of Implementation | 2009-12-01 |
| Regulation (derived from) | PRC National Standard Approval Announcement 2009 No.6 (Total No.146) |
| 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 method with the determination of the extent of vulcanized latex method A, Method B. This standard applies to the preparation of natural latex with the determination of the degree of cure. Does not apply with adhesive curing degree of determination. |
GB/T 23655-2009: Test for the cure level of compound latex
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Test for the cure level of compound latex
ICS 83.140.99
G40
National Standards of People's Republic of China
Determination of the degree of cure with latex
Posted 2009-04-24
2009-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Rubber and rubber products latex products Standardization Technical Committee Technical Committee (SAC/TC35/SC4)
Centralized.
This standard is mainly drafted by. Zhanjiang Exit Inspection and Quarantine, China Rubber Group Zhuzhou Industry Research and Design Institute of rubber, plastics, health Ansell
Health products company.
The main drafters of this standard. CSL, Deng Zhi, Xiao Lian.
Determination of the degree of cure with latex
1 Scope
This standard specifies the method for the determination with vulcanized latex degree method A, method B.
This standard applies to natural rubber latex formulated with the degree of vulcanization of the determination does not apply with adhesive curing degree of determination.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 8290 Natural rubber latex concentrate sampling
3 Determination
Determination of the degree of cure with latex into the method A, method B.
3.1 Method A degree of swelling method
3.1.1 Principle
The degree of cure with different latex film whose degree of swelling in toluene are different, with smaller degree of swelling of the latex film, the more the degree of cure
Deep, with the degree of vulcanization latex can be used to characterize the degree of swelling.
3.1.2 Instruments
3.1.2.1 mesh, 80 mesh.
3.1.2.2 ruler, precision 0.5mm.
3.1.3 Reagents
3.1.3.1 Toluene. chemically pure.
3.1.3.2 talc.
3.1.3.3 pigment.
3.1.4 Test procedure
3.1.4.1 screen filter used with latex.
3.1.4.2 according to GB/T 8290 with latex extract (3.1.4.1) about 20mL, and add 2 to 3 drops of paint, stirring with a glass rod until
Latex uniform color.
3.1.4.3 along the edge of the glass sheet latex poured onto a clean glass plate level.
3.1.4.4 Stainless steel rod flat latex evenly on a flat glass plate, keeping a uniform film thickness.
3.1.4.5 The wet latex film of (a thickness of about 2mm) placed before the drying fan, the time for at least 10min.
3.1.4.6 In front of the latex film sprinkle talcum powder to remove it from the glass plate, then sprinkle talcum powder on the back, and finally the latex film
Talc shaken off.
3.1.4.7 with a cutter and cut two test pieces. Each test piece using a ruler to measure the four directions, four times the diameter. Then calculate the average value of D1.
3.1.4.8 The wafer immersed 30min in a petri dish filled with toluene, the diameter of each wafer after swelling was measured with a ruler four four directions
Second, calculate the average D2. Before a measurement of the pressure in carefully slide the specimen slide against the sample, the measurement should be ruler in culture
Dish is measured.
3.1.5 Calculation Results
With latex degree of swelling (%) by the formula (1).
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