Resin Glass Cloth Rigid Laminated Sheet
D327Standard No.:Q/DJ10-166-2001
D328Standard No.:Q/DJ10-167-2001
D327、D328 is made from alkali-free glass fabric treated with KH560 and impregnated with F-class poly-benzoxazine resin. It is made at high temperature and high pressure.
Benzoxazine resin glass cloth rigid laminated sheet has high holding frequency of thermal mechanical strength. It is suitable for making insulating structural parts and components in F-class electric motor and electric apparatus.D327 has good abrasion resistance, it is suitable for making abrasion resistant insulating structural parts and components. D328 has high flame-resistance, it is suitable for insulating structural parts and components with the requirement of flame resistance.
1 Technical requirements
1.1 Appearance
Its surface should be flat and smooth, free of bubbles, wrinkles and crackles , slight scuffing and stain are allowed. Edges should show net cuts and be free from delamination and crackles.
1.2 Dimensions
1.2.1 The length and width are as shown in Form 1
Form 1 ｍｍ
|
Width and length |
Tolerance |
|
450～980 |
±15 |
|
990～1980 |
±25 |
1.2.2 Nominal thickness and tolerance are shown in Form 2
Form 2 mm
|
Nominal thickness |
Tolerance |
Nominal thickness |
Tolerance |
Nominal thickness |
Tolerance |
|
0.5 |
±0.15 |
3.0 |
±0.37 |
16 |
±1.12 |
|
0.6 |
±0.15 |
4.0 |
±0.45 |
20 |
±1.30 |
|
0.8 |
±0.18 |
5.0 |
±0.52 |
25 |
±1.50 |
|
1.0 |
±0.18 |
6.0 |
±0.60 |
30 |
±1.70 |
|
1.2 |
±0.21 |
8.0 |
±0.72 |
35 |
±1.95 |
|
1.5 |
±0.25 |
10 |
±0.94 |
40 |
±2.10 |
|
2.0 |
±0.30 |
12 |
±0.94 |
45 |
±2.45 |
|
2.5 |
±0.33 |
14 |
±1.02 |
50 |
±2.60 |
1.3 Bending deflection are as shown in Form 3
Form 3 ｍｍ
|
Thickness |
Bending deflection |
|
|
1000 Ruler length |
500 Ruler length |
|
|
3.0～6.0 |
≤10 |
≤2.5 |
|
6.1～8.0 |
≤8 |
≤2.0 |
|
＞8.0 |
≤6 |
≤1.5 |
1.4 Machining
The laminated sheets should be free from crackles and scraps after being machined.
1.5 The mechanical, physical and dielectric properties of laminated sheet are as shown in Form 4.
Form 4
|
No. |
Properties |
Nominal thickness of the specimen |
Units |
Values |
||
|
D327 |
D328 |
|||||
|
1 |
Density |
Optional |
g/cm2 |
1.7～1.9 |
1.7～1.9 |
|
|
2 |
Bending strength perpendicular to the laminations |
MD |
＞1.5mm， ＜ 10mm |
MPa |
≥400 |
≥400 |
|
155℃±2℃ |
≥250 |
≥250 |
||||
|
3 |
Charpy impact strength(MD) No gap |
≥5mm |
KJ/m2 |
≥150 |
≥150 |
|
|
4 |
Bonding strength |
≥10mm |
N |
≥4000 |
≥4000 |
|
|
5 |
Volume resistivity |
At room temperature |
Optional |
MΩ·m |
≥1.0×105 |
≥1.0×105 |
|
155℃±2℃ |
≥1.0×103 |
≥1.0×103 |
||||
|
6 |
Dielectric strength perpendicular to the laminations in transformer oil at 90℃±2℃ |
0.5mm～1.0mm |
MV/m |
≥20 |
≥20 |
|
|
1.1mm～2.0mm |
≥18 |
≥18 |
||||
|
2.1mm～3.0mm |
≥16 |
≥16 |
||||
|
7 |
Oxygen index |
% |
— |
≥50 |
||
|
8 |
Flammability perpendicular to the lamination |
≥3mm |
Class |
— |
FV0 |
|
2 Testing methods
2.1 Appearance
Visual method
2.2 Machining
As per Machining Methods for Insulating Laminated Products, Standard No.JB/Z141-79.
2.3 The treatment of the specimen before testing
The specimen is treated in the oven with circular sirocco of 105±2℃ for 1H.
2.4 Density
As per Method A of Testing Method of Plastic Density and Relative Density, Standard No.:GB1033-1986. Weight of specimen: 2g-50g.
2.5 Oxygen index
As per Clause 3 of Testing Method of Oxygen Index, Standard No.: GB/T 2049-198.
2.6 The other items and contents
As per Testing Method of Laminated Sheet for Electrical Purpose, Standard No.: GB 5130-1985.
3
3.1 The inspection items are as per Clause 1.1,1.2,1.3 and Item 2,8 of Form 4 in Clause 1.5 (For testing D328, Item 5 of Form 4 is also included ) , the items in Clause 1.1,1.2,1.3 should be checked one by one.
3.2 The laminated sheet shall be placed on underlay plates with height of more than 5cm from the floor in a clean and dry storage room where the temperature is below 40℃. It should be far from fire and heat sources and sunshine. The storage life of the laminated sheet is 18 months after leaving factory. If the laminated sheets have been stored more than 18 months, they may still be used after being tested to be qualified according to the technical requirements.
3.3 The other items are as per GB 1305-1985.
4 Remarks
4.1 The laminated sheets have different properties compared with metal. The method of JB/Z 141-1979 must be adopted when the product is machined.
4.2 Thermal conductivity of the laminated sheets is small, so high cutting speed and small depth of cut should be adopted when the product is machined.
4.3 Smell and a lot of dust are produced when the laminated sheet is machined, so measures for labor protection should be taken.