Recipe and production process of artificial leather of thermoplastic polyurethane

Abstract

The present invention is the recipe and production process of artificial leather of thermoplastic polyurethane. The artificial leather has thermoplastic polyurethane elastomer resin as the main material, acrylic resin, plasticizer of non-toxic polyol derivative, dispersant, stuffing, etc. The rolling process of producing thermoplastic polyurethane artificial leather includes the following steps: 1. sizing the base fabric; 2. rolling to compound TPU base material and top material; 3. adhering the compounded TPU base material and top material onto the base fabric; and 4. post-treatment of the artificial leather to obtain the thermoplastic polyurethane artificial leather product. The production process may be completed in a conventional rolling production line.

Description

technical field [0001] The invention relates to a formula of artificial leather and a manufacturing method thereof, in particular to a formula of an all-environmental-friendly thermoplastic polyurethane (TPU, Thermoplastic Polyurethane) artificial leather and a calendering manufacturing method thereof. Background technique [0002] The production of traditional artificial leather mainly uses PU synthetic leather and PVC synthetic leather as the main body. The main raw materials used to manufacture PU synthetic leather are PU resin and dilution solvent containing high solvent. The main raw material used to manufacture PVC synthetic leather is PVC powder. And liquid plasticizer, the plasticizer adopts phthalates, and the manufacturing method is coating method, pasting method, blown film method or T-die casting method, etc. The formula and manufacturing method of traditional artificial leather have the following disadvantages: [0003] (1) When PU synthetic leather is used as ...

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Problems solved by technology

[0003] (1) When PU synthetic leather is used as the main body and the coating method is used to manufacture artificial leather, since the semi-finished product after condensation and water washing needs to be dried in the coating process, the solvent used in the PU resin formula will be derived during the drying process. Become waste water, waste gas, and pollute the environment; moreover, the hydrolysis resistance of PU synthetic leather is poor. If you want to improve its hydrolysis resistance, its peel strength and surface abrasion resistance will be relatively poor, especially when the base fabric is made of nylon. When weaving, the peel strength is less than 0.5Kg / 3cm. When used in high friction and impact applications, the surface wear resistance and peel strength quality are difficult to meet market requirements, and the practicability is not great.

[0004] (2) When PVC synthetic leather is used as the main body and lamination method is used to manufacture artificial leather, in the process of kneading and calendering, due to long-term operation in a high-temperature open system, dust and plasticizer volatilization waste gas are easily generated, which is very polluting to the environment In addition, when PVC products are incinerated, toxic gases such as dioxin, chlorine, and heavy metal particles will be produced; PVC synthetic leather has poor low-temperature bending resistance and impact resistance. The abnormal phenomenon of adding additives to spit out,

[0005] (3) Phthalates are toxic reagents. As plasticizers, the manufactured artificial leather contains toxic formulas, which are used in daily life and endanger people's health.

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