One-step production method of thermoplastic polyurethane waterproof coiled material

Abstract

The invention discloses an one-step production method of a thermoplastic polyurethane waterproof coiled material. The method comprises the following steps: (1) heating solid raw material to be liquid, weighing liquid raw material according to the mixing ratio, and uniformly mixing; (2) conveying the liquid raw material to a screw extruder to chemically react and melt; (3) preparing through a film forming machine to obtain a Tpu film. Compared with the prior art, the method has the advantages that the fixed processing mode and process of the Tpu film are completely changed, the energy consumption is small, the resource and energy are saved, the carbon discharge is reduced, and the effects on energy saving and consumption reduction are obvious; the method has outstanding characteristics and obvious improvement on either improvement or active effect of energy saving and emission reduction.

Description

technical field

[0001] The invention relates to a manufacturing process of a waterproof material, in particular to a method for producing a thermoplastic polyurethane waterproof coiled material in one step. Background technique

[0002] Polyurethane (Pu) film is used as a waterproof membrane (such as the inventor's ZL201120326904.5 durable polyurethane waterproof membrane patent), its superiority, reliability and durability have been recognized by the industry, but the main concern It is a problem that the cost may be very high, such as expensive raw materials, high processing costs, and so on.

[0003] First of all, polyurethane (Pu) is no longer a "noble" product. Taking the most expensive polyether type Tpu (thermoplastic polyurethane) as an example, the main raw materials it uses are tetrahydrofuran homopolyether (PTMEG) and pure MDI (MT). In the past, each ton of these two raw materials was more than 40,000 yuan, but now PTMEG is about 30,000 yuan / ton, and MT is about...

Examples

Embodiment Construction

[0019] One-step method of the present invention produces the method for thermoplastic polyurethane waterproof coiled material, and its processing step comprises:

[0020] (1) Heat the solid raw material into liquid, and measure the liquid raw material according to the ratio, and mix evenly;

[0021] (2) Transport the liquid raw materials to the screw extruder for chemical reaction and melting;

[0022] (3) Polyurethane film - Tpu waterproof membrane is produced in a film forming machine.

[0023] For example, the main raw materials used to make polyether Tpu films are tetrahydrofuran homopolyether (PTMEG) and pure MDI (MT). Using the process of the present invention, PTMEG and heated and melted pure MDI are directly measured according to the proportioning ratio. Mix evenly, transport to the screw extruder for chemical reaction and melting, and then make Tpu waterproof membrane on the film forming machine, which saves the production of Tpu particles in the traditional process....

technical field

[0001] The invention relates to a manufacturing process of a waterproof material, in particular to a method for producing a thermoplastic polyurethane waterproof coiled material in one step. Background technique

[0002] Polyurethane (Pu) film is used as a waterproof membrane (such as the inventor's ZL201120326904.5 durable polyurethane waterproof membrane patent), its superiority, reliability and durability have been recognized by the industry, but the main concern It is a problem that the cost may be very high, such as expensive raw materials, high processing costs, and so on.

[0003] First of all, polyurethane (Pu) is no longer a "noble" product. Taking the most expensive polyether type Tpu (thermoplastic polyurethane) as an example, the main raw materials it uses are tetrahydrofuran homopolyether (PTMEG) and pure MDI (MT). In the past, each ton of these two raw materials was more than 40,000 yuan, but now PTMEG is about 30,000 yuan / ton, and MT is about...

Examples

Embodiment Construction

[0019] One-step method of the present invention produces the method for thermoplastic polyurethane waterproof coiled material, and its processing step comprises:

[0020] (1) Heat the solid raw material into liquid, and measure the liquid raw material according to the ratio, and mix evenly;

[0021] (2) Transport the liquid raw materials to the screw extruder for chemical reaction and melting;

[0022] (3) Polyurethane film - Tpu waterproof membrane is produced in a film forming machine.

[0023] For example, the main raw materials used to make polyether Tpu films are tetrahydrofuran homopolyether (PTMEG) and pure MDI (MT). Using the process of the present invention, PTMEG and heated and melted pure MDI are directly measured according to the proportioning ratio. Mix evenly, transport to the screw extruder for chemical reaction and melting, and then make Tpu waterproof membrane on the film forming machine, which saves the production of Tpu particles in the traditional process....