1  Main content and applicable cope

1.1  The standard herein (the "Standard") stipulates the quality standards for PP delivered at DCE.

1.2  The Standard applies to standard products delivered under the PP futures contract of DCE.

2  Cited rules and standards

The provisions of the following documents are incorporated as the provisions of the Standard by reference. For those cited documents noted with dates, all of their following amendments (excluding corrections) and revised versions shall not be applied to the Standard; for those without noted dates, their latest versions shall be applied to the Standard.

GB/T 6678 General Rules for Sampling of Chemical Products

GB/T 6679 General Rules for Sampling of Solid Chemical Products

GB/T 12670 Polypropylene (PP) Resin

3  Terms and Definitions

Subject to relevant rules on terms and definitions of GB/T 12670 and its cited rules and standards.

4  Technical requirements

4.1  PP shall be in granules with natural color and without impurities.

4.2  The quality of PP shall meet the quality requirements in Table 1.

Table 1: PP Delivery Quality Standards

Testing Items

Unit

Quality Requirement

Granule Appearance

Black Granules

Granules/kg

0

Colored Granules

Granules/kg

≤5

Oversized / Undersized Granules

g/kg

≤100

Melt Mass-flow Rate (MFR)

g/10min

≥2.5 and ≤4.0

Isotactic Index

%

>95.5

Ash Content (Mass Fraction)

%

≤0.03

Tensile Properties

Tensile Yield Stress

MPa

>29.0

Tensile Break Stress

MPa

>15

Nominal Tensile Strain at Break

%

>150

4.2.1   The melt mass-flow rate (MFR) shall be greater than or equal to 2.5 g/10min while at the same time be less than or equal to 4.0 g/10min. Besides, the deviation between the MFR and the nominal value shall not exceed 30% of the nominal value.

5  Testing methods

5.1  Sampling requirements shall be subject to GB/T 6678 and GB/T 6679;

5.2  Quality targets inspection shall be subject to GB/T 12670.

6  Labeling, packaging and storage

6.1  Labeling

Labels for PP products shall be clearly added to the packaging bags. The labels shall include the following information: trademark, manufacturer"s name, standard number, product name, grade, production date, batch number and net weight, etc.

6.2  Packaging

Products shall be packaged in the original manufacturer"s packaging bags or other recognized packaging bags by the original manufacturer, and the packaged product shall be in net weigh of 25 ± 0.2 kg per bag. Packaging materials shall be able to ensure that the product can be transported, piled and stored for many times without leaking or being contaminated, and shall be water-proof and dust-proof.

6.3  Storage

PP shall be stored in warehouses that are well-ventilated, dry, clean and equipped with adequate fire safety facilities. The materials shall be kept away from heat and direct sunlight, and shall be prohibited to store them in the open air.

7  Additional note

The Standard shall be subject to the interpretation of DCE.

Disclaimer: This English translation may be used for reference only. In cases there is any discrepancy between the English version and the original Chinese version, the original Chinese version shall prevail. Dalian Commodity Exchange may change or update this English translation without any prior notice and shall accept no responsibility or liability for damage or loss caused by any error, inaccuracy, misunderstanding, or change with regard to this English translation.

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