阅读说明：本技术 一种新型tpr鞋用合成革制备方法 (Preparation method of novel synthetic leather for TPR shoes ) 是由 徐继军 易小文 于 2021-08-17 设计创作，主要内容包括：本发明涉及皮革技术领域,且公开了一种新型TPR鞋用合成革制备方法,其特征在于,包括以下步骤：将TPR材料：链接助剂：dfm：色浆按照20：1：1：1的比例混合,并通过真空脱泡机进行浸泡形成浆料；将聚氨酯：dfm：溶剂：色浆按照25：12.5：5：2的比例混合,形成粘接涂料。该新型TPR鞋用合成革制备方法,干法面层添加特殊链合剂,在鞋面和鞋底接触面,增加材料的粘合性,增加牢度,使鞋具有高回弹,易塑型等特点；双层涂布增加了面层与湿法层的粘性,使干法与湿法形成粘合体,降低了表层出现针孔的机率同时减少溶剂的挥发。(The invention relates to the technical field of leather, and discloses a preparation method of novel synthetic leather for TPR shoes, which is characterized by comprising the following steps: and (3) mixing TPR materials: linking aid: dfm: the color paste is prepared from the following components in percentage by weight: 1: 1: 1, and soaking the mixture by a vacuum defoaming machine to form slurry; mixing polyurethane: dfm: solvent: the color paste is 25: 12.5: 5: 2 to form the adhesive coating. According to the preparation method of the novel TPR synthetic leather for the shoes, the special chain mixture is added into the dry method surface layer, and the adhesion of the material and the fastness are increased on the contact surface of the vamp and the sole, so that the shoes have the characteristics of high resilience, easiness in molding and the like; the double-layer coating increases the viscosity of the surface layer and the wet layer, so that an adhesive body is formed by the dry method and the wet method, the probability of pinholes on the surface layer is reduced, and the volatilization of a solvent is reduced.)

1. A preparation method of novel synthetic leather for TPR shoes is characterized by comprising the following steps:

(1) and (3) mixing TPR materials: linking aid: dfm: the color paste is prepared from the following components in percentage by weight: 1: 1: 1, and soaking the mixture by a vacuum defoaming machine to form slurry;

(2) mixing polyurethane: dfm: solvent: the color paste is 25: 12.5: 5: 2 to form a bonding coating;

(3) uniformly coating the treated base cloth on the base cloth by a coating table and a coating knife coating method, then feeding the base cloth into a coagulating tank to form a membrane, fully washing with water, drying and shaping, and cooling to form the fabric;

(4) and coating the bonding coating on the sub-fabrics, then jointing the two sub-fabrics, and fully jointing the sub-fabrics by a hot-pressing roller to form the synthetic leather.

2. The method for preparing the novel TPR synthetic leather for shoes, as claimed in claim 1, wherein the base cloth is put into a water immersion tank through a cloth storage rack, then the water in the base cloth is squeezed out by a squeezing roller, and the base cloth is scalded and semidried by a ironing wheel.

3. The method for preparing the novel TPR synthetic leather for shoes as claimed in claim 1, wherein the temperature of the coagulation tank is generally normal temperature, the temperature can be properly increased in winter, the temperature is generally controlled at 25 ℃, the fracture strength of the coating is reduced by overhigh temperature, and the time from the solidification of the coating layer in water to the completion of the solidification of the coating layer in the coagulation tank is 8-15 min.

4. The method of preparing synthetic leather for TPR shoes as claimed in claim 1, wherein the temperature during drying is not more than 150 ℃.

5. The method for preparing the synthetic leather for the novel TPR shoes as recited in claim 1, wherein the temperature of the hot press roller is controlled between 100 ℃ and 120 ℃.

Technical Field

The invention relates to the technical field of leather, in particular to a preparation method of novel TPR (thermal Plastic rubber) shoe synthetic leather.

Background

In the current PU shoe leather injection molding method, PVC injection molding occupies a great advantage. The product has the advantages of low price, oil resistance, wear resistance, good insulativity and the like. The defects are that the whole texture is poor, the air permeability is poor, the folding resistance is poor, the temperature sensitivity is high, the heating softening is realized, the hardening is realized in the cold, and the hidden trouble of cracking is caused under the extreme condition. The environment-friendly effect is poor, and the plasticizer and the stabilizer with certain dosage are contained. The european and american countries have made clear restrictions on PVC materials in 2015.

The TPR injection molding is formed by hot melt injection molding of granules, and has the characteristics of low price, easy molding, high elasticity, easy staining, excellent low-temperature performance, strong gripping power and skid resistance. The disadvantages are that the material is heavy, the flexibility is slightly poor, and the shock absorption capability is poor, but the environment-friendly surface completely meets the requirements of Rohs, Reach and the like. Therefore, the TPR shoe material is accepted by more and more manufacturers, merchants and consumers, and the comprehensive index is the most excellent.

In order to solve the problems that pu leather is easy to have poor bonding, pinholes and waste gas emission, a novel preparation method of synthetic leather for TPR shoes is provided.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a preparation method of novel TPR (thermal Plastic rubber) shoe synthetic leather.

The invention provides the following technical scheme: a preparation method of novel synthetic leather for TPR shoes comprises the following steps:

(1) and (3) mixing TPR materials: linking aid: dfm: the color paste is prepared from the following components in percentage by weight: 1: 1: 1, and soaking the mixture by a vacuum defoaming machine to form slurry;

(2) mixing polyurethane: dfm: solvent: the color paste is 25: 12.5: 5: 2 to form a bonding coating;

(3) uniformly coating the treated base cloth on the base cloth by a coating table and a coating knife coating method, then feeding the base cloth into a coagulating tank to form a membrane, fully washing with water, drying and shaping, and cooling to form the fabric;

(4) and coating the bonding coating on the sub-fabrics, then jointing the two sub-fabrics, and fully jointing the sub-fabrics by a hot-pressing roller to form the synthetic leather.

Preferably, when the base cloth is used, the base cloth needs to pass through the cloth storage rack and enter the water immersion tank, then the squeezing roller is used for squeezing water in the base cloth, and the base cloth is scalded and semi-dried through the ironing wheel.

Preferably, the temperature of the coagulation tank is generally normal temperature, the temperature can be properly heated in winter, the breaking strength of the coating is reduced by controlling the temperature to be 25 ℃, and the time from the solidification of the coating layer in water to the complete solidification of the coating layer in the coagulation tank is 8-15 min.

Preferably, the temperature during drying is generally not more than 150 ℃.

Preferably, the temperature of the hot-pressing roller is controlled between 100 ℃ and 120 ℃.

Compared with the prior art, the invention has the following beneficial effects:

according to the preparation method of the novel TPR synthetic leather for the shoes, the special chain mixture is added into the dry method surface layer, and the adhesion of the material and the fastness are increased on the contact surface of the vamp and the sole, so that the shoes have the characteristics of high resilience, easiness in molding and the like; the double-layer coating increases the viscosity of the surface layer and the wet layer, so that an adhesive body is formed by the dry method and the wet method, the probability of pinholes on the surface layer is reduced, and the volatilization of a solvent is reduced.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer and to describe more fully technical solutions of the embodiments of the present disclosure, and to keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and known parts of the disclosure are omitted so as to avoid unnecessarily obscuring the concepts of the present disclosure.

A preparation method of novel synthetic leather for TPR shoes comprises the following steps:

(1) and (3) mixing TPR materials: linking aid: dfm: the color paste is prepared from the following components in percentage by weight: 1: 1: 1, and soaking the mixture by a vacuum defoaming machine to form slurry;

(2) mixing polyurethane: dfm: solvent: the color paste is 25: 12.5: 5: 2 to form a bonding coating;

(3) when the treated base cloth is used, the base cloth needs to be put into a water immersion tank through a cloth storage rack, then the water in the base cloth is squeezed by a squeezing roller, the base cloth is scalded and semi-dried by a ironing wheel, a coating platform is used for uniformly coating a slurry mixed solution on the base cloth by adopting a coating knife coating method, then the base cloth enters a coagulating tank to form a membrane, the temperature of the coagulating tank is generally normal temperature, the temperature can be properly heated in winter, the temperature is generally controlled to be 25 ℃, the fracture strength of a coating layer is reduced due to overhigh temperature, the coating layer is completely solidified from water entering to the coagulating tank, the time for 8-15min is needed, the base cloth is fully washed by water and is dried and shaped, the temperature is generally not more than 150 ℃ during drying, and the base cloth is cooled to form the component fabric;

(4) coating the bonding coating on the sub-fabrics, then jointing the two sub-fabrics, and fully jointing by a hot-pressing roller, wherein the temperature of the hot-pressing roller is controlled between 100 and 120 ℃ to form the synthetic leather.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.