ASTM D1076 - 15 - Standard Specification for Rubber. Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex

ASTM D1076 - 15

Standard Specification for Rubber. Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex

Status : Current   Published : December 2015

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

(A)  Dry rubber content by definition and use is the acid coagulable portion of latex after washing and drying.
(B)  It is accepted that KOH numbers for boric acid preserved latices will be higher than normal, equivalent to the amount of boric acid in the latex.
(C)  Blue or gray color usually denotes iron contamination caused by improper storage in containers.

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:

[This table has been removed.]

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




Standard NumberASTM D1076 - 15
TitleStandard Specification for Rubber. Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
StatusCurrent
Publication Date15 December 2015
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors Centrifuged Hevea Natural Latex, Creamed Hevea Natural Latex, Fatty Acid Content, Inorganic Matter Content, Natural Rubber Latex
ICS83.040.10
PublisherASTM
FormatA4
DeliveryYes
Pages13
File Size191 KB
Price£45.00


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