CN101760969A - Method for producing nubuck - Google Patents

Abstract

The invention provides a method for producing nubuck. The flexibility and hydrolysis resistance of the prepared nubuck are improved. The method comprises the following steps: allowing non-woven fabrics of which the gram weight is 240 to 260g/m<2> to pass through a soaking trough at a linear speed of 6 to 8m/s; pre-drying the soaked non-woven fabrics with an oven of with the temperature is 120+/-10 DEG C; coating a layer of coating on the surfaces of the pre-dried non-woven fabrics with a scraper; allowing the non-woven fabrics after the treatment to pass through a coagulating tank and a rinsing bath in turn for coagulation treatment and rinsing treatment, and controlling the tension of the non-woven fabrics in the rinsing bath to 2.5+/-0.5kgf; drying the rinsed non-woven fabrics with the oven to prepare a semi-finished product of nubuck, and controlling the temperature of the oven to 100+/-10 DEG C; grinding the back of the semi-finished product with sand paper; and finally, coating a layer of dispersing agent on the front of the semi-finished product to prepare the finished product of nubuck.

Description

A kind of ox Ba Ge production method

Technical field

The present invention relates to a kind of synthetic leather production method, particularly a kind of ox Ba Ge production method.

Background technology

Synthetic leather (emulational leather) in the application in fields such as clothes, sport footwear, sofa and case and bag more and more widely, this has remedied the rare influence of bringing for relevant manufacturing industry of Animal Skin to a great extent, existing its production stage of ox Ba Ge that is mainly used in women's shoes, case and bag and furniture generally comprises: produce batching-wet production-oven dry rolling-middle inspection-Niu Ba grinding-printing treatment-finished product inspection, its main deficiency of ox Ba Ge obtained by this method is that hydrolysis and feel are not relatively poor.

Summary of the invention

The purpose of this invention is to provide a kind of ox Ba Ge production method, prepared ox Ba Ge obtains to improve aspect pliability and anti-hydrolytic performance.

The technical solution adopted in the present invention is such: a kind of ox Ba Ge production method comprises the steps:

1) be 240g/m, with grammes per square metre ²～260g/m ²Nonwoven fabric with the linear velocity of 6～8m/s by containing immersion trough, the described immersion liquid that contains that contains in the immersion trough is 100: 400～500: 1: 3 polyurethane resin by weight portion: dimethyl formamide: softener: hydrolysis auxiliary agent and an amount of colorant;

2), the nonwoven fabric after the impregnation carried out prebake by baking oven handle, oven temperature is 120 ± 10 ℃;

3), by the nonwoven surface coating one deck coating of scraper after prebake is handled, described coating is 100: 50～70: 1 polyurethane resin by weight portion: dimethyl formamide: hydrolysis auxiliary agent and an amount of colorant are formed;

4) nonwoven fabric after the above-mentioned steps processing is cured processing and washing processing by coagulating basin and rinsing bowl successively, the Tension Control of described nonwoven fabric in rinsing bowl is at 2.5 ± 0.5Kgf;

5), the nonwoven fabric after will washing dries to handle by baking oven and makes ox Ba Ge semi-finished product, described temperature of oven is 100 ± 10 ℃;

6), with 150 ± 10 purpose sand paper the ox crust being carried out at the semi-finished product back side grinds;

7), can make ox Ba Ge finished product at half-finished positive coating one deck dispersant by printing machine.

By adopting the aforementioned techniques scheme, the invention has the beneficial effects as follows: the tension force of washing process is dropped to about 2.5Kgf by known 4Kgf in the wet production process, simultaneously the temperature of drying and shaping is reduced to about 100 ℃ by known 150 ℃, and contain immersion liquid and adopt hydrolysis resistant polyurethane resin and softener, the ox Ba Ge anti-hydrolytic performance that is made by this special process is good, and pliability is between 3.2～3.5, and feel is improved obviously.

The specific embodiment

Embodiment discloses a kind of ox Ba Ge production method, and its production process comprises: produce batching-wet production-oven dry rolling-middle inspection-Niu Ba grinding-printing treatment-finished product inspection, its concrete production stage is as follows:

1) be 250g/m, with grammes per square metre ²Nonwoven fabric with the linear velocity of 7m/s by containing immersion trough, the described immersion liquid that contains that contains in the immersion trough is 100: 450: 1 by weight portion: 3 polyurethane resin: dimethyl formamide: softener: hydrolysis auxiliary agent and an amount of colorant; Wherein, described polyurethane resin adopts hydrolysis EU resin to be used to generate the synthetic leather resin of hydrolysis), described softener adopts model to produce softener for DK-150 Korea S, and the hydrolysis auxiliary agent adopts Japan to produce UF-100 hydrolysis auxiliary agent.

2), the nonwoven fabric after the impregnation carried out prebake by baking oven handle, oven temperature is 120 ± 10 ℃;

3), by accurate scraper coating medium is coated on nonwoven surface equably, described coating medium is 100: 50: 1 polyurethane resin by weight portion: dimethyl formamide: hydrolysis auxiliary agent and an amount of colorant are formed;

4) nonwoven fabric after the above-mentioned steps processing is cured processing and washing processing by coagulating basin and rinsing bowl successively, the Tension Control of described nonwoven fabric in rinsing bowl is at 2.5 ± 0.5Kgf, and this tension force is low relatively with respect to known 4Kgf tension force;

5), the nonwoven fabric after will washing dries to handle by baking oven and makes ox Ba Ge semi-finished product, described temperature of oven is 100 ℃, this temperature with respect to known 150 ℃ much lower, this helps to keep the pliability of ox Ba Ge;

6), with 150 ± 10 purpose sand paper the ox crust being carried out at the semi-finished product back side grinds;

7), can make ox Ba Ge finished product by printing machine at half-finished positive coating one deck dispersant, in the time of concrete operations, dispersing aid is dissolved in the DMF solvent and is positioned in the hopper, synthetic leather flood the back through roller in hopper dries rolling and gets final product.

Claims (1)

1. an ox Ba Ge production method is characterized in that comprising the steps:

1) be 240g/m, with grammes per square metre ²～260g/m ²Nonwoven fabric with the linear velocity of 6～8m/s by containing immersion trough, the described immersion liquid that contains that contains in the immersion trough is 100: 400～500: 1: 3 polyurethane resin by weight portion: dimethyl formamide: softener: hydrolysis auxiliary agent and an amount of colorant;

2), the nonwoven fabric after the impregnation carried out prebake by baking oven handle, oven temperature is 120 ± 10 ℃;

3), by the nonwoven surface coating one deck coating of scraper after prebake is handled, described coating is 100: 50～70: 1 polyurethane resin by weight portion: dimethyl formamide: hydrolysis auxiliary agent and an amount of colorant are formed;

4) nonwoven fabric after the above-mentioned steps processing is cured processing and washing processing by coagulating basin and rinsing bowl successively, the Tension Control of described nonwoven fabric in rinsing bowl is at 2.5 ± 0.5Kgf;

5), the nonwoven fabric after will washing dries to handle by baking oven and makes ox Ba Ge semi-finished product, described temperature of oven is 100 ± 10 ℃;

6), with 150 ± 10 purpose sand paper the ox crust being carried out at the semi-finished product back side grinds;

7), can make ox Ba Ge finished product at half-finished positive coating one deck dispersant by printing machine.