Technical specification for injection grade flexible PVC plastics for branch cables

Author：hlyb Add Time：2016-04-14 14:34:23

1 Scope

This specification specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of injection grade flexible polyvinyl chloride (PVC) materials for branch cables.

2 requirements and test methods

The mechanical and physical properties, electrical properties and test methods of injection plastics shall meet the requirements of Table 1.

Table 1 main performance indexes of injection plastics

Performance items		index	test method
Tensile strength Mpa		≥16	GB/T1040
Elongation at break%		≥200	GB/T1040
200 ℃ thermal stability time min		≥90	GB/T8815
Volume resistivity at 20 ℃ (Ω· m)		≥1 × ten ten	GB/T1410
Dielectric strength MV / M		≥20	GB/T1408. one
Thermal deformation%		≤40	GB/T8815
Low temperature impact embrittlement temperature (℃)		-20	GB/T5470
Post aging test 100℃ × 168h	Tensile strength Mpa	≥16	GB/T8815
	Change rate of tensile strength%	≤±20
	Elongation at break%	≥200
	Change rate of elongation at break%	≤±20
	Mass loss g / M 2	≤20

3 inspection rules

3.1 inspection methods and requirements

3.1.1 for injection plastics produced by qualified suppliers, the performance of the products is stable (no quality problems occur within one year and the products are returned), and sampling inspection shall be conducted at intervals.

3.1.2 each batch of injection plastics supplied by new manufacturers shall be sampled and inspected. If the samples are qualified for five consecutive times, they shall be transferred to sampling inspection of alternate batches.

3.1.3 if the injection plastic of the designated manufacturer is not qualified once, the sampling inspection shall be conducted according to the provisions of × × ×.

3.1.4 for each approved plastic, the warranty or test report of the supplier's material shall be attached.

3.1.5 sampling method

2 bags or more for each batch.

3.2 test items

3.2.1 the inspection items are tensile strength, elongation at break, density, thermal stability and dielectric strength.

3.2.2 the performance that cannot be tested shall be accepted according to the manufacturer's test report or warranty.

4 packing

Note the plastic is packed with plastic film bag inside and PP woven fabric / PE / kraft paper composite bag is used for external packaging. The net weight of each bag is 25 ± 0.2kg, but no negative tolerance is allowed per ton.

5 mark

The packing bag shall be marked with the name of manufacturer, product name and variety, batch number, color, production date, weight mark, and product certificate shall be attached.

6 annex

When the injection plastics enter the factory, the manufacturer's quality guarantee or quality inspection sheet shall be attached. The type test report of the legal inspection department shall be attached to the first supply. After normal supply, the manufacturer shall also provide the type test report of the statutory inspection department once a year.

7 transportation

Note plastics should not be exposed to the sun and rain during transportation, and the packaging should not be damaged.

8 storage

Plastic injection should be stored in a clean, cool, dry and ventilated warehouse. If it is wet, it must be dried before use. The storage period is 12 months from the production date.

Browse：

On A：Technical specification for soft grade flame retardant flexible PVC cable compound

Next：General use and development direction of special cables

Industry news

Technical specification for injection grade flexible PVC plastics for branch cables