GB/T 41873-2022Plastics—Polyetheretherketone(PEEK) resin (English PDF)

6.6 Tensile yield stress

Carry out in accordance with the methods specified in GB/T 1040.1 and GB/T 1040.2.

The test specimen is type 1A. The test speed is 50 mm/min.

6.7 Tensile modulus

Carry out in accordance with the methods specified in GB/T 1040.1 and GB/T 1040.2.

The test specimen is type 1A. The test speed is 1 mm/min.

6.8 Flexural strength and flexural modulus

Carry out according to the method specified in GB/T 9341. The test speed is 2 mm/min.

6.9 Izod notched impact strength

Carry out in accordance with the method specified in GB/T 1843. The type of notch is type A.

6.10 Glass-transition temperature

The glass-transition temperature shall be carried out according to the regulations in GB/T 19466.2.

6.11 Melting peak temperature

The melting peak temperature shall be carried out according to the regulations in GB/T 19466.3.

6.12 Temperature of deflection under load

Carry out in accordance with the provisions in GB/T 1634.2. The bending load is 1.80 MPa; lay flat.

6.13 Density

Carry out in accordance with the provisions in GB/T 1033.1. Use the immersion method. The test sample shall be the specimen after injection moulding.

7.1 Inspection classification

Product inspection is divided into two types: Type inspection and exit-factory inspection.

7.2 Inspection items

All items specified in Clause 5 are type inspection items. Type inspection shall be carried out in the following situations:

a) When new products are trial-formulated and identified;

b) After formal production, if the raw materials or processes have changed significantly, which may affect the product performance;

c) When the product device is overhauled and production is resumed;

d) When the exit-factory inspection results are significantly different from the last type inspection results;

e) Other situations that require type inspection.

The exit-factory inspection items of polyetheretherketone resin shall at least include fluidity and mechanical properties.

7.3 Rules for lot grouping

It shall take polyetheretherketone products of the same designation - produced on the same production line, with the same raw materials, and with the same process - as one lot. The production plant can also batch the products according to a certain production cycle or a storage bin. Products are inspected and accepted in lots.

7.4 Sampling plan

The manufacturer can, according to the actual situation such as the production cycle, determine the specific sampling plan.

The sampling of packaged products shall be carried out in accordance with the provisions in GB/T 2547.

7.5 Determination rules

The inspection shall be carried out in accordance with the test methods specified in this document. According to the inspection results and the requirements of this document, make a conformity determination on the product. Only when all item indicators meet the requirements, can it be determined as conformity.

7.6 Re-inspection rules

If a certain indicator in the inspection results does not meet the requirements of this document, it is possible to re-sample from this lot of products with double the number of sampling units AND re-inspect the item. The re-inspection results shall be used as […]