Sinton made a significant impact upon the Irish linen trade. Not least establishing the village of Laurelvale, County Armagh. Thomas Sinton was sent to board at Friends" School, Lisburn – a Quaker school.
(William) Maynard Sinton, Justice of the Peace (High Sheriff and Unionist County Councillor for County Armagh – lived at Ballyards Castle)
David Arthur Sinton of Stramore House, Gilford)
Dorothy Hesilridge Sinton
Thomas Greville Sinton (High Sheriff, lived at Laurelvale House)
Alfred Henry Hesilridge Sinton (of Hill House, Laurelvale)
Frederick Buckby Sinton (of Banford House, Tullylish, Gilford)
Jemima Sarah Isabella Sinton
His effects were valued, in 1887, at over £100,000.
Sinton built the model village of Laurelvale (named due to the abundance of laurel bushes in the area), also known as Laurel Vale, to house workers at his large linen factory – Thomas Sinton & Company The factory was started in the early 1850s and by the 1880s it employed around 700 workers, responsible for manufacturing very high-grade heavy linen.
The company was responsible for almost all of the houses built in the village, especially those for family members and factory managers. He also owned factories in Tandragee, by the River Cusher, and at Killyleagh, County Down.
The Laurelvale factory closed in 1944 when it was acquired by the Ministry of Defence and used by the Hoffman company for the manufacture of ball bearings for tank turrets et cetera
In the 1970s it was damaged in a fire but was inhabited by a private family until the mid eighties. Both the house and the factory area have recently been cleared and replaced by a housing development. All that remains of Laurelvale House and the factory now is an old wall, which was part of the stable block.
The Tandragee factory was still in production, employing 200 people, until 1996.
There were then plans afoot to convert the mill, which remained the Sinton family"s property, into a tourist and retail facility, with the hope of a £7–8 million investment. Planning permission was granted for this, however, the building was put up for sale by Thomas (Tim) Sinton (the subject"s great-grandson) in 2003.