The reason isnt to make it stronger it is to save MONEY. Pure powder is the strongest vinyl available on the market but is expensive. The United States lets manufacturers get away with only 70%. The rest is pellets but these pellets are recycled vinyl. They are not stronger. And when this recycled vinyl is exposed to the elements it breaks down over time. There are other clemicals used to help this vinyl not break down as fast.
Amerimax is owned by Euramax, a European company. NOT CANADIAN> It is a leading producer of aluminum, steel, vinyl, copper and fiberglass products for original equipment manufacturers, distributors, contractors and home centers in North America. www.euramax.com
Euramax owns many companies throughout the world:
Amerimax Building Products(ABP)-has 15 manufacturing facilites in the US with a broad range of materials for the transportation, residential window, residential and commercial patio cover, fabricated/OEM, laminated products and manufactured housing industries. ABP has 9 metal fabrication facilities located across the US, two vinnyl window manufacturing centers and state of the art lamination facility.
Amerimax Diverdified Products, Inc. which is the worlds largest manufacturer of gutter guards and accessories.
Amerimax Home Products, Inc is the leading manufacturer of metal rain-carrying systems in the United States. Having 8 plants in the US.
Berger Brothers Company is a manufacturer of roof drainage products used for remodeling and renovation markets. They also product residential snow guards. Berger Brothers offers more than 2000 products.
Ellbee Limited is a major supplier of windows and entrance doors in both alumium and PVCu for the UK market.
Euramax Coated Products BV is coating alumium and steel for recreational vehicles, industrial, architectural, building, transportation and container markets. Services are throughout Europe and Asia.
Euramax Coated Products Limited operates as a producer and supplier of painted aluminum and steel coil and sheets to the general industrial markets in UK Scandinavia, Middle East.
Euromax Industries SA has 50 years of experience in the finishing and fabrication of aluminum extrusions and the production of glazed windows.
They also own Fabral which has 8 facilities in the US that produces metal roofing and siding.
Pretty big company that sells more than windows.
Hope this helps.