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  • ASTM
    D1076-15(2020) Standard Specification for Rubber—Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
    Edition: 2020
    $113.57
    Unlimited Users per year

Description of ASTM-D1076 2020

ASTM D1076-15-Reapproved2020

Historical Standard: Standard Specification for Rubber—Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex




ASTM D1076

Scope

1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories:

Category 1—Centrifuged Hevea natural latex preserved with ammonia only or by formaldehyde followed by ammonia.

Category 2—Creamed Hevea natural latex preserved with ammonia only or by formaldehyde followed by ammonia.

Category 3—Centrifuged Hevea natural latex preserved with low ammonia with other necessary preservatives.

Category 4—Centrifuged, or centrifuged and creamed, guayule latex, or other natural rubber latex, containing less than 200 µg total protein per gram dry weight of latex, with ammonia or other hydroxide, with other necessary preservatives and stabilizers.

Category 5—Centrifuged Hevea natural latex treated with aluminum hydroxide or by other means, preserved with ammonia only or by formaldehyde followed by ammonia containing less than 0.5 % non-rubber content.

1.2 This specification is not necessarily applicable to latices prepared or preserved by other methods, and shall not be construed as limiting the desirability or usefulness of other categories of latices. It does apply to natural latex sources other than Hevea brasiliensis but does not apply to compounded latex concentrates.

1.3 The analytical procedures applicable to the specifications are included and appear in the following order:

 

Section

    Sampling

6 and 7

    Total Solids

8

    Dry Rubber Content

9

    Protein Content

10

    Total Alkalinity

11

    Viscosity

12

    Sludge Content

13

    Coagulum Content

14

    KOH Number

15

    pH

16

    Mechanical Stability

17

    Copper and Manganese

18

    Density

19 – 31

    Volatile Fatty Acids

32 – 36

    Boric Acid

37

    Dry Films

38

    Precision for All Test Methods

39

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


Keywords


ICS Code

ICS Number Code 83.040.10 (Latex and raw rubber)


DOI: 10.1520/D1076-15R20

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