Forming in one time and spreadig technology of regenerated leather

Abstract

The invention discloses a method of moulding and matting of the regenerative leather. The process is grinding, sheeting, drying, polishing and knurling and obtaining the product. The invention saves the process of getting rid of the feather and changes the existing base-making process into the direct sheet-making process and thus saves the process of sheet-making. At the same time, adding the fibre or non-fibre or fiber / non-fibre products to strengthen the intensity of the regenerative leather over 1.18mX1.68m for sofa of two (three) people.

Description

technical field [0001] The invention relates to a regenerated leather production process, in particular to a regenerated leather one-time molding and bedding process. Background technique [0002] Existing regenerated leather is processed through a series of processes of crushing, roughening, billeting, drying (drying), sheeting, grinding, spraying, and embossing by using the scraps from tanneries and leather products factories. Because the regenerated leather manufactured by the existing technology is only processed by crushing the scraps of leather, its internal fiber structure is in the form of short fibers. Although it is combined with a certain adhesive, there is still a fundamental problem of insufficient strength. , There are limitations in application. The existing regenerated leather can only be used in the manufacture of single dining chairs with a length and width of 0.8 meters × 0.8 meters in belts, bags and furniture. manufacture of leather products. In additi...

AI Technical Summary

Problems solved by technology

[0003] ① Pollution of the environment

[0004] The current process will produce a lot of waste gas and dust when roughening; in the billet making process, a lot of water is needed, and more than 70% of the water is discharged in the form of sewage, polluting the environment

[0005] ②Water and electricity consumption

[0008] In the current process, before the formal opening of the sheeting process, the uneven parts on the upper and lower surfaces of the leather blank must be flattened before the sheet can be officially opened. Taking a piece of leather blank with a thickness of 40 mm as an example, a sheet of 1.5 mm is cut. Generally, 13 pieces of finished skins are produced from one billet, and there are 4 skins on both sides of the bottom as incomplete products. At least 20-25% of the skin resources are wasted.

[0009] ④Increase the labor intensity of workers

[0011] ⑤ prone to accidents

[0012] The large amount of dust generated during the current process of roughening causes accumulation, which poses a fire hazard and cannot meet the fire protection requirements; the strip-shaped leather knife used in the leather-cutting process is extremely sharp, and if the pin is not careful, it will cut people's hands, especially when changing the knife. , there are incidents of cutting human hands from time to time, and in order to maintain the sharpness of the skin knife, the grinding wheel needs to be ground at any time synchronously to grind the skin knife, so a certain amount of dust will be generated, which will affect health

[0013] ⑥Increasing business costs

[0014] The roughening and slicing processes in the current process require 4 workers to operate at the same time. The slicing machine needs to change the knives and grinding wheels frequently. It is calculated to start work 10 months a year, and it needs to pay a lot of electricity, water, and labor wages, which greatly increases the cost of the enterprise. cost

[0015] ⑦ Not conducive to the development of new products

[0016] The current technology has gone through the blank making and skinning process, and when the leather is sliced, as long as there is a small silk, thread and other sundries mixed in the leather, as soon as the knife touches it, a scratch will be formed on the leather surface, making this piece Leather becomes inferior leather, thus restricting the widespread use of recycled leather