INGVAR Kamprad, the Ikea founder who turned a small-scale mail order business into a global furniture empire, has died aged 91.

Ikea Sverige, the chain’s Swedish unit, said on Twitter that Kamprad died on Saturday at his home in Smaland, Sweden.

“He will be much missed and warmly remembered by his family and IKEA staff all around the world,” the company said.

Kamprad’s life story is intimately linked to the company he founded at age 17 on his family’s farm.

His work ethic, frugality and down-to-earth style remain at the core of its corporate identity today.

But his missteps in life, including early flirtations with Nazism, never rubbed off on Ikea, one of the world’s most recognisable brands.

Kamprad formed the company’s name from his own initials and the first letters of the family farm, Elmtaryd, and the parish of Agunnaryd where it is located. It is in the heart of Smaland, a forested province whose people are known in Sweden for thrift and ingenuity.

Later in life, his name often appeared on lists of the world’s richest men, but he never adopted the aura of a tycoon. He drove a Volvo and dressed unassumingly.

In a 1998 book he co-authored about Ikea’s history, he described his habit of visiting vegetable street markets right before they closed for the day, hoping to get a better price on their goods.

Born March 30, 1926, Kamprad was a precocious entrepreneur who sold matchboxes to neighbours from his bicycle. He found that he could buy them in bulk very cheaply from Stockholm, and sell them at a low price but still make a good profit.

From matches, he expanded to selling fish, Christmas tree decorations, seeds, and later ball-point pens and pencils.

Kamprad soon moved away from making individual sales calls and began advertising in local newspapers and operating a makeshift mail-order catalogue.

He distributed his products via the local milk van, which delivered them to the nearby train station.

In 1950, Kamprad first introduced furniture produced by local manufacturers in forests into his catalogue.

After the positive response he received, he soon decided to discontinue all of the other products and focus on low-priced furniture.

Since then the Ikea concept – keeping prices low by letting the customers assemble the furniture themselves — offers affordable home furnishings at stores across the globe.

In 1994, Swedish newspaper Expressen reported that Kamprad had contacts with Swedish fascist leader Per Engdahl in the 1940s and '50s.

In a letter to employees, Kamprad admitted that he once had sympathies for the far-right leader and called it "a part of my life which I bitterly regret".

In the 1998 book, he gave more details about his youthful "delusions", saying he had been influenced as child by his German grandmother's strong support for Hitler. His paternal grandparents emigrated to Sweden in the 1890s.

He moved to Switzerland in the late 1970s to avoid paying Swedish taxes, which at the time were the highest in the world. He decided to return home only after his wife Margaretha died in 2011.

In June 2013, Kamprad announced that he would retire from the board which controls the Ikea brand as part of moves to hand responsibilities over to his son, Mathias.