CN1238400A

CN1238400A - Method for preparing artificial polyurethane leather

Info

Publication number: CN1238400A
Application number: CN 98114514
Authority: CN
Inventors: 刘名德
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-04
Filing date: 1998-06-04
Publication date: 1999-12-15

Abstract

A dry calendering process for making artificial polyurethane leather features that the formula of said artificial leather contains such components as granular polyurethane (70-82%), modifier (3-7%), foaming agent (1-3%), regulating resin (4-14%), filler (3-7%) and pigment (1-3%). Its advantages are no use of toxic and harmful volatile solvent, no environmental pollution, and mass feeling controlled by the foaming agent.

Description

A kind of manufacture method of polyurethane artificial leather

The present invention relates to a kind of manufacture method of polyurethane artificial leather.

The manufacture method of existing polyurethane artificial leather is based on wet method, and used solvent (as dimethyl formamide) is volatilization in a large number in process of production, produces harmful substance, pollute, and speed of production is slow, needs to use release liners, also has polyurethane resin and the release liners same topic of adhesion mutually.

The present invention is intended to propose a kind of manufacture method that can reach the polyurethane artificial leather of pollution-free effect.

What the present invention proposed produces the polyurathamc artificial leather with pressure court of a feudal ruler method, its prescription is polyurethane particles 70%-82%, modification agent 3%-7%, blowing agent 1%-3%, mediation resin 4%-14%, filler 3%-7%, colorant 1%-3%, wherein modification agent is R1COOR2, R1 and R2 are the alkyl of C3-C10, blowing agent is azodiisobutyronitrile or Celogen Az, and the resin that is in harmonious proportion is the homopolymers or the copolymer of mylar, and filler is calcium carbonate or talcum powder.Its method for making in turn includes the following steps: 1, the material for preparing is dropped into mixer, mix; 2, insert banbury then, heat up and plasticate; 3, enter the further gel of two roller machines, homogenizing again, send filter to remove impurity, filtration is extruded; 4, deliver to calender, pull out film forming; 5, deliver to then make-up machine and base cloth, lining in heating, add and depress applying, 6, deliver to foaming machine then again, at high temperature blowing agent reduces foaming, 7, make product through embossing, post processing.

Because the rolling process that the present invention proposes is produced the polyurathamc artificial leather above-mentioned prescription and technology are arranged, belonging to dry method (rolling process) produces, whole process of production is not used poisonous and hazardous volatile solvent, thereby can not cause environmental pollution, and can control to adjust the texture effect by blowing agent.

Below in conjunction with drawings and Examples the present invention is further described.

Fig. 1 is the production process block diagram of the embodiment of the invention.

Embodiment 1: with the polyurethane particles of weight ratio 78% and 4% modification agent, 2% blowing agent, 10% mediation resin, 5% filler, 1% colorant, modification agent is R1COOR2, R1 is the alkyl of C3, R2 is the alkyl of C3, blowing agent is an azodiisobutyronitrile, the resin that is in harmonious proportion is the homopolymers of mylar, filler is a calcium carbonate, after material stirred, insert banbury and heat up and plasticate, enter the further gel of two roller machines, homogenizing again, sending filter to filter extrudes, remove impurity, deliver to calender, pull out film forming; To make-up machine and base cloth, lining in heating, add and depress applying, deliver to foaming machine then, at high temperature blowing agent reduces foaming, and makes product through embossing, post processing.

Embodiment 2: with the polyurethane particles of weight ratio 82% and 3% modification agent, 2% blowing agent, 8% mediation resin, 4% filler, 1% colorant, modification agent is R1COOR2, R1 is the alkyl of C4, R2 is the alkyl of C9, blowing agent is a Celogen Az, the resin that is in harmonious proportion is the copolymer of mylar, filler is a talcum powder, after material stirred, insert banbury and heat up and plasticate, enter the further gel of two roller machines, homogenizing again, sending filter to filter extrudes, remove impurity, deliver to calender, pull out film forming; To make-up machine and base cloth, lining in heating, add and depress applying, deliver to foaming machine then, at high temperature blowing agent reduces foaming, and makes product through embossing, post processing.

With reference to Fig. 1 and embodiment, the rolling process that the present invention proposes is produced the foamed polyurethane artificial leather above-mentioned prescription and step, belong in method (rolling process) and produce, whole process of production is not used poisonous and hazardous volatile solvent, thereby can not cause environmental pollution, and can control to adjust the texture effect by blowing agent.

Claims

1, a kind of manufacture method of polyurethane artificial leather, its prescription is polyurethane particles 70%-82%, modification agent 3%-7%, blowing agent 1%-3%, mediation resin 4%-14%, filler 3%-7%, colorant 1%-3%, wherein modification agent is R1COOR2, R1 and R2 are the alkyl of C3-C10, blowing agent is azodiisobutyronitrile or Celogen Az, and the resin that is in harmonious proportion is the homopolymers or the copolymer of mylar, and filler is calcium carbonate or talcum powder.Its method for making in turn includes the following steps: (1), the material for preparing is dropped into mixer mixes; (2), then insert banbury, heat up and plasticate; (3), again enter the further gel of two roller machines, homogenizing, send filter to filter and extrude, remove impurity; (4), deliver to calender, pull out film forming; (5), deliver to then make-up machine and base cloth, lining in heating, add and depress applying; (6), again deliver to foaming machine then, blowing agent at high temperature reduces foaming; (7), make product through embossing, post processing.