4/16/2023 0 Comments Wholesale pu folder factory![]() Necessary cookies are absolutely essential for the website to function properly. Finally, it is trimmed, cut, rolled and wrapped into branded polythene packaging. The sheet is then heated at temperatures up to 250˚c and blown, cured and allowed to cool. Once the paste is ready, it is rolled into a wide thin sheet and this, in turn, is rolled onto a chain to produce the desired profile of either a ‘flat’ or ‘waffle’ underlay. ![]() This is followed by a process called calendarising, where the mix is converted to a smooth and consistent paste. The styro butadiene synthetic rubber (SBR) is blended with oils, blowing agents and fillers to create the desired performance characteristics. The lower tog rating reduces the thermal insulation ability, so heat can pass through without causing overheating. Sponge underlays can also be made with low tog ratings for use with underfloor heating. They are incredibly flexible and cover more applications than any other type of underlay. They are also exceptionally good at minimising both impact sound and airborne sound between rooms. They are extremely comfortable no other underlay produces quite the same feel underfoot. Sponger rubber underlays are the most traditional form of underlay and have been around since the 1950s. The sponge rubber underlays fit into both the Tredaire brand family (the comfort-oriented ones such as Colours Red) and the Duralay family (for the more specialist ones such as Technics). The underlay is then finished, trimmed, cut and rolled, and finally wrapped into branded polythene packaging. The log is then dried to remove residual moisture and peeled to a pre-defined product thickness.ĭuring the lamination stage, backing and films are applied. The log is subjected to steam under high pressure to cure the binding agent and bond the material together. It is mixed and coated with a binding agent before moulding into a large ‘log’ of a pre-defined density. This foam is shredded and then granulated into smaller pieces. The foam used in PU underlay is either from offcuts or trimming from other processes, or are recycled after use such as furniture foam, so all of the foam is recycled in some way. Open cell is usually the best for underlay due to it’s flexible and elastic properties. PU foam is economical to manufacture and can be produced with either an open or closed cell structure. It is also lightweight, so it’s easy to carry and fit. This makes it a favoured material for carpet underlayment. PU is particularly good at insulation and impact sound reduction as well as being inherently comfortable and durable. All branded PU foam underlays are part of the Tredaire brand, a byword for luxurious, underfoot comfort. ![]()
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