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Technical specification of polyester film for electrical insulation

Author：hlyb Add Time：2016-04-05 15:14:05

1. Scope

This specification specifies the requirements, test methods, packaging, marking, storage and transportation of polyester film materials for electrical insulation.

2. Standards adopted

Refer to GB 13950-1992 polyester film for electrical insulation.

3. Requirements

3.1 appearance

The surface of the film should be smooth and smooth without particles, bubbles, wrinkles, conductive impurities and dirt (such as dirt and oil stains) on the surface. Fish eyes beyond the deviation range are not allowed. The edge of the film should be neat without damage.

3.2 specifications and dimensions

3.2.1 film roll supply.

3.2.2 length: each coil shall not be less than 500m, each coil shall not be more than 2 sections, and each section shall not be less than 200m. There shall be obvious marks and shall be tightly coiled on the core. The number of joints and the length of * * short section are shown in 3.4.

3.2.3 width and tolerance

Width and tolerance shall be in accordance with table 1.

Table 1 limit deviation of coil diameter and width mm

Width	Roll diameter			Limit deviation
				Film width	The film running height on the winding end surface is less than
8~15	≥	one hundred and fifty		±0.2	zero point five
＞15～50	≥	one hundred and eighty		±0.3
＞50～150				±0.5
＞150～300	two hundred and fifty	～	four hundred and fifty	±1.0	one
＞300				±2.0	two

3.2.4 film thickness and difference

The thickness and tolerance of the film are in accordance with table 2.

Table 2 film thickness and tolerance mm

Nominal thickness	Tolerance
zero point zero four zero	±0.007

3.3 performance requirements

The performance requirements of the film should meet the requirements of Table 3.

3.4 number of joints and length of * short section

The number of joints per coil and the length of * * short section shall be determined by both parties through negotiation. When not negotiated, the number of joints per roll and the length of each roll shall be in accordance with table 3.

Table 3 number of joints and * short length

The number of joints is not more than			***Short length, M Not less than
Width not more than 50mm		Width greater than 50 mm
The coil diameter is not more than 250mm	Roll diameter greater than 250mm	Roll diameter 250-450mm
three	four	three	one hundred

4. Test method

The test items and methods meet the requirements of Table 4.

5. Inspection rules

5.1 inspection methods and requirements

5.1.1 conduct random inspection at least once a month.

5.1.2 sampling method: take 3 plates or more for each specification.

5.1.3 for each batch of films, the quality guarantee certificate or test report of the supplier's materials shall be attached.

5.2 test items

5.2.1 the inspection items include thickness, tensile strength, elongation at break and quantification.

5.2.2 other performance shall be accepted according to the manufacturer's warranty or test report.

Table 4 test items and methods

Serial number	entry name		Company	index	test method
one	appearance		—	Meet the requirements of 3.1	Visual inspection
two two point one two point two two point three	size	thickness	mm	Meet the requirements of 3.2	GB/T13541 GB/T13541
		length	m
		width	mm
three	Shrinkage 150 ℃	Longitudinal transverse	%	≤3.0	GB/T13541
				≤3.0
four	Tensile strength	portrait	MPa	≥150	GB/T13541
		transverse		≥150
five	Elongation	portrait	%	≥60	GB/T13541
		transverse		≥60
six	Breakdown strength 50 Hz	20±5℃	kV/mm	≥130	GB/T13541
		130±2℃		≥130
seven	breakdown voltage	50Hz 20±5℃	kV	≥4.0	GB/T13541
		130±2℃		≥3.3
eight	ration		g/cm2	48~52	Weighing method

6. Packaging

The film should be rolled on a hard paper or plastic cylinder, and each roll should be packed with moisture-proof paper or plastic bag and placed overhead in the packing box.

7. Signs

The name of manufacturer, product model, specification, batch number, date of manufacture, gross weight and net weight shall be indicated on each box of film. At the same time, mark "moisture proof" and "impact proof" on the box.

8. Attachments

The manufacturer's product certificate and quality assurance certificate shall be attached. The type test report of the legal inspection department shall be attached to the first supply, and the type test report of the current year's legal inspection department shall be provided once every two years during the normal supply.

9. Transportation

Avoid damp and mechanical damage during transportation.

10. Storage

It should be stored in a clean, dry and ventilated warehouse, away from heat sources and direct sunlight. The storage period is 12 months from the date of production.

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Technical specification of polyester film for electrical insulation