PET Film / PET Fleece Laminates Prepreg.

D279 is made from DMD and special heat resistant resin. It has the characteristics of long storage life,

low curing temperature and short curing time. After being cured, it has excellent electrical properties, good adhesion and heat resistance. The heat resistance is Class F. D279 is used as layer insulation or iner insulation of low-voltage copper/ aluminum foil winding in dry-type transformers as well as slot insulation and liner insulation in Class B and F electric motors and electric appliances. It passed the thermal ageing routine test fulfilled by Quality Supervision and Testing Center of China machinery industry for Electromechanical Materials. It also passed SGS test for toxic and hazardous substance detection.

1. Technical requirements

 1.1 Appearance

   Its surface should be flat, free of uneven resin and impurities affecting performances. While being

de-coiled, its surface shall not conglutinate each other. Free of such defects such as creases, bubbles and

wrinkles.

 1.2 Dimension

   Nominal width:1000 mm.

   Nominal weight: 50+/-5kg /Roll.

   The splices shall not be more than 3 in a roll.

 1.3 Performance requirements: The standard values for D279 are shown in Table 1 and relevant typical         values shown in Table 2.

2. Test method

 2.1 The test for dissolvable resin content, volatile content and shear strength under tension shall be as     per the relevant stipulations in Chapter 5 of Standard Q/DJ3-210-2006.

 2.2 The other items shall be as per the stipulations in Part II: Test Method, Electrical Insulating         Flexible Laminate,GB/T 5591.2-2002 (MOD with IEC60626-2: 1995).

3. Packing, transporting and storage

 3.1 D279 should be wrapped with plastic film then put in clean & dry carton

 3.2 The storage life is 6 months at temperature of below 25ºC after leaving factory. If the storage         duration is over 6 months, the product can still be used when being tested to be qualified. The         product should be put and/or stored upright and keep away from fire, heat and direct sunshine.

 3.3 The other requirements shall accord with the stipulations in Part I: Definition & General Requirement,     Electrical Insulating Flexible Laminates, GB/T 5591.1-2002 (MOD with IEC60626-1: 1995).