CN111926579B

CN111926579B - Fluorine-free anti-siphon high-density synthetic leather and production method thereof

Info

Publication number: CN111926579B
Application number: CN202010756811.XA
Authority: CN
Inventors: 贾军辉; 苏德业; 叶陆阳; 柯博元
Original assignee: An'an China Co ltd
Current assignee: An'an China Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2023-02-10
Anticipated expiration: 2040-07-31
Also published as: CN111926579A

Abstract

The invention provides a fluoride-free anti-siphon high-density synthetic leather and a production method thereof, wherein the method comprises the steps that non-woven fabrics are unreeled through a fabric storage rack, the unreeled non-woven fabrics enter an impregnation groove for impregnation, and the non-woven fabrics enter a pre-solidification groove for pre-solidification after the impregnation is finished; the pre-solidified non-woven fabric is subjected to ironing treatment by an ironing device and is subjected to surface material blade coating treatment by a coating table device provided with a coating knife; the non-woven fabric coated with the fabric enters a three-fold coagulation tank for coagulation to obtain synthetic leather; the synthetic leather coming out of the triple-fold coagulating tank enters a washing tank to be washed by water to obtain bass; and (3) the bass coming out of the rinsing bath is pre-scalded by a ironing roller, dried by an oven and wound. The invention has the advantages that: the produced bass has fluorine content meeting the environmental protection requirement, and does not cause harm to human health; the anti-siphon effect is good, and the stripping data is high; the base material has the advantages of full base hand feeling, good rebound resilience and the like.

Description

Fluorine-free anti-siphon high-density synthetic leather and production method thereof

Technical Field

The invention relates to the field of synthetic leather, in particular to fluorine-free anti-siphon high-density synthetic leather and a production method thereof.

Background

The synthetic leather product is applied to various aspects in our life, and the functions of the product are rich and colorful. In recent years, waterproof synthetic leather materials are increasingly favored, and are applied to more and more shoe types. People are also always experimenting on how to make casual shoes, sports shoes and the like which are worn normally into waterproof shoes with the same waterproof effect as water shoes. At present, more and more shoes with waterproof effect are on the market, but the stability and environmental protection performance of the shoes still can not meet the requirements; and a lot of waterproof materials are all added with fluorine waterproofing agents, and although the waterproof effect of the fluorine waterproofing agents is good, fluorine is a substance harmful to human bodies and is not environment-friendly, so fluorine-containing products are increasingly eliminated.

In view of the above problems, the present inventors have conducted extensive studies and have made the present invention.

Disclosure of Invention

The invention aims to solve the technical problem of providing fluorine-free anti-siphon high-density synthetic leather and a production method thereof, and solves the problem that the waterproof stability and environmental protection performance of the conventional synthetic leather cannot meet the requirements.

The invention is realized in the following way:

in a first aspect: a production method of fluorine-free anti-siphon high-density synthetic leather comprises the following steps:

s1, unreeling non-woven fabrics through a fabric storage rack, allowing the unreeled non-woven fabrics to enter an impregnation tank for impregnation, and allowing the non-woven fabrics to enter a pre-solidification tank for pre-solidification after impregnation; the pre-solidified non-woven fabric is subjected to ironing treatment by an ironing device and then is subjected to surface fabric blade coating treatment by a coating table device provided with a coating knife;

s2, the non-woven fabric coated with the fabric enters a three-fold coagulation tank for coagulation to obtain synthetic leather; the synthetic leather coming out of the three-fold coagulation tank enters a washing tank for washing to obtain the base;

s3, the bass coming out of the rinsing bath is pre-scalded through a ironing roller, dried through an oven, and wound.

Further, in the step S1, the thickness of the non-woven fabric is 0.65 to 0.75mm.

Further, the gram weight of the non-woven fabric is 195-205g/m ² 。

Further, the burst strength of the nonwoven fabric was 17kgf/cm ² 。

Furthermore, the tensile strength of the non-woven fabric is more than 120N in the warp direction and more than 70N in the weft direction.

Furthermore, the elongation at break is greater than 80% in the warp direction and greater than 170% in the weft direction.

Further, in the step S1, the thickness of the non-woven fabric is 0.85 to 0.95mm.

Furthermore, the gram weight of the non-woven fabric is 235-245g/m ² 。

Further, the burst strength of the nonwoven fabric was 18kgf/cm ² 。

Furthermore, the tensile strength of the non-woven fabric is larger than 140N in the warp direction and larger than 80N in the weft direction.

Furthermore, the elongation at break is greater than 90% in the warp direction and greater than 190% in the weft direction.

Further, before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried.

Further, in the step S1, the unwinding speed of the cloth storage rack is 9m/min.

Further, in the step S1, the impregnation liquid in the impregnation tank is prepared as resin: dimethylformamide: tear resistance aid: hydrolysis-resistant auxiliary agent: color paste is prepared by the following components in percentage by weight of 100:250:15:2:15 are added.

Further, the prepared impregnation liquid is stirred for 15-20 minutes at the normal temperature at the stirring speed of 1000-1500 r/min.

Furthermore, the viscosity of the prepared impregnation liquid is between 140 and 200cps.

Further, in the impregnation liquid, the resin is hydrolysis-resistant impregnation resin.

Furthermore, in the impregnation liquid, the solid content of the resin is 30%, the hundred percent modulus is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400%, and the viscosity range is 10-12 ten thousand.

Further, in the step S1, the pressure of the oil-impregnated press roller in the impregnation tank is between 5 and 5.5Kg.

Further, in the step S1, the sugar degree of the pre-solidified liquid in the pre-solidification tank is 35 to 38%.

Further, in the step S1, the pressure of the pre-solidification oil compression roller in the pre-solidification groove is between 5 and 5.5Kg.

Further, in the step S1, the ironing temperature of the ironing device is 50 ℃.

Further, in the step S1, the blade-coated fabric is prepared by: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: color paste is prepared by the following components in percentage by weight of 100:45:3:1.5:2 are added.

Further, the prepared fabric is stirred at high speed for 30-35 minutes at the stirring speed of 1000-1500r/min at normal temperature.

Further, after the fabric is uniformly stirred at a high speed, vacuum defoaming is carried out for 90min at a stirring speed of 300 +/-50 r/min.

Furthermore, the viscosity of the prepared fabric is 9000cps-10000 cps.

Further, in the fabric, the resin is polyester-polyether blend resin.

Furthermore, the solid content of the resin is 35%, the hundred percent modulus is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity range is 16-18 ten thousand.

Further, in the step S1, the coating gap of the coating knife is between 225 +/-5 filaments.

Further, in the step S1, the coating weight of the coating knife is between 1.48 +/-0.05 kg/y.

Further, in the step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 16 to 18%.

Further, in the step S2, the temperature of the coagulation liquid in the triple-turn coagulation tank is 30 ± 2 ℃.

Further, in the step S2, before the synthetic leather enters the rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.45-1.50 mm.

Further, in the step S2, before the synthetic leather enters the rinsing bath, the width of the synthetic leather is measured and controlled to be 1.47-1.49 m.

Further, in the step S2, the rinsing bath has 15 sets.

Furthermore, in the 15 groups of rinsing baths, the rinsing sugar degrees of the first six groups of rinsing baths are controlled to be between 20 and 10 percent, the rinsing sugar degrees of the middle six groups of rinsing baths are controlled to be between 10 and 0 percent, and the rinsing sugar degrees of the last three groups of rinsing baths are 0 percent.

Further, the washing temperature of the last three groups of washing tanks is controlled at 70 +/-5 ℃.

Further, in the step S3, the pre-ironing temperature of the ironing roller is 110 ± 10 ℃.

Further, in the step S3, the oven has 5 groups.

Furthermore, in 5 groups of drying ovens, the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃.

Further, after the drying is finished, the thickness of the rolled bass is controlled to be 1.3-1.4 mm.

Further, after drying is finished, the width of the rolled bass is controlled to be 145-147 cm.

In a second aspect: the fluorine-free anti-siphon high-density synthetic leather is prepared by the production method.

The invention has the following advantages: according to the bass produced by the technical scheme of the invention, the three-centimeter opposite-sticking peeling performance can reach 120N/3cm, and the softness test value is between 2.3 and 2.5; the left, middle and right sides sample respectively and test developments are prevented the siphon, and at 3000 times of pre-deflection processing, there is not the infiltration condition, and the siphon is prevented to the back test static, can reach twenty four hours and do not have the climbing phenomenon. Therefore, the produced bass has fluorine content meeting the requirement of environmental protection, and cannot cause harm to human health; the anti-siphon effect is good, and the stripping data is high; the base material has the advantages of full base hand feeling, good rebound resilience and the like.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

FIG. 1 is a schematic view of the structure of a production apparatus of the present invention.

FIG. 2 is a schematic view showing the structure of the water repellent tank and the second oven according to the present invention.

FIG. 3 is a schematic view of the internal structure of the pre-coagulation tank of the present invention.

Description of reference numerals:

1-unreeling cloth storage rack, 2-soaking tank, 21-oil soaking press roll, 3-pre-solidifying tank, 31-pre-solidifying oil press roll, 4-ironing device, 5-coating device, 51-coating knife, 6-three-fold-back solidifying tank, 61-solidifying oil press roll, 7-water washing tank, 71-third press roll, 72-water washing oil press roll, 8-ironing roll, 9-first oven, 91-second guide roll, 10-cooling roll, 11-reeling cloth storage rack, 12-water-proofing agent tank, 121-water-proofing oil press roll, 13-second oven, 131-third guide roll, 14-first press roll, 15-second press roll and 16-first guide roll.

Detailed Description

The invention relates to a production method of fluorine-free anti-siphon high-density synthetic leather, which comprises the following steps:

and S3, pre-ironing the bass discharged from the rinsing bath through an ironing roller, drying the bass through an oven, and rolling the dried bass.

According to the bass produced by the technical scheme, the three-centimeter opposite-sticking peeling energy can reach 120N/3cm in a test, and the softness test value is between 2.3 and 2.5; the dynamic anti-siphon of left, right side sample test respectively, at the pre-deflection processing 3000 times, there is not the infiltration condition, and the static anti-siphon of back test can reach twenty four hours and can not have the climbing phenomenon. Therefore, the Bayes produced by the invention have fluorine content meeting the environmental protection requirement and can not cause harm to human health; the anti-siphon effect is good, and the stripping data is high; the base material has the advantages of full base hand feeling, good rebound resilience and the like.

Because the technical scheme of the invention has higher requirements on physical properties (physical properties), certain physical property requirements including higher density, thicker overall structure and good rebound resilience are required to be met in the selection of the non-woven fabric. Because the semi-finished product needs different thickness specifications of 2 during specific production and manufacturing, one is 1.2mm, and the other is 1.4mm; therefore, 2 different specifications of nonwoven fabrics need to be selected.

Specification of the first nonwoven fabric:

in the present invention, in order to satisfy physical properties such as high density, a massive structure, and good resilience, the thickness of the non-woven fabric is 0.65 to 0 in the step S1.75mm. The gram weight of the non-woven fabric is 195-205g/m ² . The burst strength of the nonwoven fabric was 17kgf/cm ² . The tensile strength of the non-woven fabric is more than 120N in the warp direction and more than 70N in the weft direction. The elongation at break is more than 80% in warp direction and more than 170% in weft direction.

Specification of the second nonwoven fabric:

in the present invention, in order to satisfy physical properties such as high density, a thick overall structure, and good resilience, the thickness of the nonwoven fabric is 0.85 to 0.95mm in the step S1. The gram weight of the non-woven fabric is 235-245g/m ² . The burst strength of the nonwoven fabric was 18kgf/cm ² . The tensile strength of the non-woven fabric is greater than 140N in the warp direction and greater than 80N in the weft direction. The elongation at break is greater than 90% in warp direction and greater than 190% in weft direction.

In the invention, before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment by using a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The invention requires higher waterproof effect, so the non-woven fabric needs to be pretreated; the non-woven fabric is treated and dried by the water-based waterproof agent, and the non-woven fabric is enabled to obtain a waterproof effect through treatment and permeation of the water-based waterproof agent.

In the invention, in order to better meet the actual production requirement and realize better permeation effect, in the step S1, the unreeling speed of the cloth storage rack is 9m/min.

In the present invention, in step S1, the impregnation solution in the impregnation tank is prepared as follows: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: color paste is prepared by the following components in percentage by weight of 100:250:15:2:15 are added. The impregnation material is prepared from the following components: dimethylformamide: and (3) a tear-resistant auxiliary agent: the anionic surfactant, the hydrolysis-resistant assistant and the color paste are mixed according to the weight ratio of 100:300:15:2:1:12, adding; compared with the prior impregnation material, the invention reduces the part of the dimethylformamide, thereby improving the viscosity of the impregnation slurry, improving the solid content of the whole impregnation liquid and having better hand feeling.

In the invention, in order to completely dissolve the resin, the color paste and the hydrolysis-resistant auxiliary agent, the prepared impregnation liquid is stirred for 15-20 minutes at the normal temperature at the stirring speed of 1000-1500 r/min.

In the invention, in order to ensure that the whole solid content of the impregnation liquid is improved and the hand feeling is better, the viscosity of the prepared impregnation liquid is between 140 and 200cps.

In the present invention, the resin in the impregnation liquid is a hydrolysis-resistant impregnation resin. The hydrolysis-resistant impregnated resin has the advantages of excellent color development, excellent dynamic anti-siphon effect and no fluorine compound.

In the impregnation liquid, the solid content of the resin is 30 percent, the hundred percent modulus is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400 percent, and the viscosity range is between 10 and 12 ten thousand. The resin with physical properties has the advantages of low speed, large material consumption and fine crease when the DMF aqueous solution is solidified; the resin is characterized in that the resin has the water repellent effect under the condition of no adding water-splashing agent, so that the anti-siphon effect is achieved when the finished product is obtained.

In the invention, in the step S1, the pressure of the oil-impregnated press roller in the impregnation tank is between 5 and 5.5Kg. Because certain pressure is needed to be applied to the non-woven fabric during impregnation, and the pressure cannot be too much, the pressure is controlled between 5 and 5.5Kg.

In the invention, in order to realize the pre-coagulation purpose and improve the product performance, in the step S1, the sugar degree of pre-coagulated solid in the pre-coagulation tank is 35-38%; the sugar degree is the concentration of DMF in an aqueous solution of DMF and is measured by Abbe refractometer. The pre-coagulation liquid is obtained by mixing dimethyl formamide and water.

In the invention, in the step S1, the pressure of the pre-solidified oil pressing roller in the pre-solidifying groove is between 5 and 5.5Kg. Because certain pressure needs to be applied to the non-woven fabric during pre-solidification, and the pressure cannot be too much, the pressure is controlled between 5 and 5.5Kg.

In the present invention, in order to achieve a better ironing effect, in the step S1, the ironing temperature of the ironing device is 50 ℃. The ironing device adopts six wheels of ironing rollers.

In the present invention, in the step S1, the draw-coated fabric is prepared by: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:45:3:1.5:2 are added. The former fabric is prepared from resin: dimethylformamide: anionic active agent: hydrolysis resistance auxiliary agent: color paste is prepared by the following components in percentage by weight of 100:40:1:1.5:3, adding; compared with the prior fabric preparation, the fluorine-free filler is added in the fabric, so that the fullness of the slurry is improved; the part of the dimethylformamide is increased, the viscosity of the slurry is reduced, and the slurry can easily permeate into the non-woven fabric; the anionic active agent is deleted, and although the anionic active agent is beneficial to improving the peeling strength, the auxiliary agent has certain hydrophilicity and can affect a waterproof test more or less, so that the stability is not high; the black paste is reduced from 3 parts to 2 parts at present, and because the black paste contains carbon black which absorbs water comparatively, the reduction of the parts is also helpful for the waterproof test.

In the invention, in order to completely dissolve the resin, the fluorine-free filler, the hydrolysis-resistant additive and the color paste and ensure the uniformity of the slurry, the prepared fabric is stirred at a high speed of 1000-1500r/min for 30-35 minutes at normal temperature. The high-speed stirring time must be strictly controlled between 30 and 35 minutes, because the slurry may be insufficiently stirred when the time is too short, and the slurry temperature is too high when the time is too long, so that the dead slurry is generated.

In the invention, in order to eliminate bubbles in the fabric, the fabric is uniformly stirred at a high speed and then vacuum defoamed for 90min at a stirring speed of 300 +/-50 r/min.

In the invention, in order to ensure that the sizing agent can more easily permeate into the non-woven fabric, the viscosity of the prepared fabric is 9000cps-10000cps (the temperature is 30 ℃).

In the invention, in the fabric, the resin is polyester-polyether blend resin. The polyester-polyether blended resin has the advantages of high solid content, excellent finished leather resilience, high peel strength and no fluorine-containing compound in the resin.

In the invention, the solid content of the resin is 35 percent, the percent modulus is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500 percent, and the viscosity range is 16-18 ten thousand. Compared with the prior resin, the resin with physical properties has higher solid content under the condition of reducing the viscosity, so that the resin has better rebound effect; when the resin with physical properties is foamed and solidified by a DMF (dimethyl formamide) aqueous solution, the foam pore structure is thinner than that of the conventional resin, and the elasticity is better; the resin has the greatest characteristic of water repellency under the condition of no addition of a water splashing agent, so that the anti-siphon effect is achieved when a finished product is obtained.

In the present invention, in order to ensure that the thickness of the coating layer can meet the actual production requirement, in the step S1, the coating gap of the coating knife is between 225 ± 5 filaments.

In the invention, in order to ensure that the coating amount can meet the actual production requirement, in the step S1, the coating amount of the coating knife is between 1.48 +/-0.05 kg/y. In practice, after the coating is applied, attention is paid to observing the surface condition of the coating, and timely treatment is required once an abnormality occurs.

In the invention, in order to achieve a better solidification effect, in the step S2, the sugar degree of the solidification liquid in the three-fold solidification tank is 16-18%; the sugar degree is the concentration of DMF in DMF water solution, and is measured by Abbe refractometer. In order to meet the requirement of three-fold solidification and ensure the solidification effect, the length of the three-fold solidification tank is set to be 30m.

In the present invention, in order to sufficiently solidify the slurry, the temperature of the solidification liquid in the triple-turn solidification tank is 30 ± 2 ℃ in the step S2.

According to the production method, the non-woven fabric is pre-solidified through the pre-solidification tank, so that the permeation effect of the non-woven fabric can be met, and then the non-woven fabric is solidified through the three-fold-back solidification tank, so that the problem that the cell structure is large can be effectively solved.

In the invention, in order to meet the actual production requirement, in the step S2, the thickness of the synthetic leather is measured before the synthetic leather enters the rinsing bath, and the thickness is controlled to be 1.45-1.50 mm.

In the invention, in order to meet the actual production requirement, in the step S2, the width of the synthetic leather is measured before the synthetic leather enters the rinsing bath, and the width is controlled to be 1.47-1.49 m.

In order to achieve a better water washing effect, the invention adopts multiple stages of water washing tanks, and the water washing sugar degree is gradually reduced, in the step S2, the water washing tanks are provided with 15 groups, in the 15 groups of water washing tanks, the water washing sugar degree of the first six groups of water washing tanks is controlled to be 20-10%, the water washing sugar degree of the middle six groups of water washing tanks is controlled to be 10-0%, and the water washing sugar degree of the last three groups of water washing tanks is 0%, wherein the sugar degree is the concentration of DMF in DMF aqueous solution, and the data is obtained after measurement by an Abbe refractometer. The washing temperature of the last three groups of washing tanks is controlled at 70 +/-5 ℃.

In the present invention, in order to achieve a better ironing effect, in the step S3, the pre-ironing temperature of the ironing roller is 110 ± 10 ℃. The ironing rollers are eight-wheel ironing rollers.

In the invention, in order to achieve a better drying effect, a gradient drying mode is adopted, and in the step S3, 5 groups of drying ovens are arranged. In 5 groups of drying ovens, the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃.

In the invention, in order to meet the actual production requirement, the thickness of the rolled bass is controlled to be 1.3-1.4mm after the drying is finished.

In the invention, in order to meet the actual production requirement, the width of the wound bass is controlled between 145cm and 147cm after the drying is finished.

The invention is further illustrated by the following specific examples, which take the specification of the first nonwoven fabric as an example:

example 1

A production method of fluorine-free anti-siphon high-density synthetic leather comprises the following steps:

s1, unreeling non-woven fabrics through a fabric storage rack, allowing the unreeled non-woven fabrics to enter an impregnation tank for impregnation, and allowing the non-woven fabrics to enter a pre-solidification tank for pre-solidification after impregnation; and (3) ironing the pre-solidified non-woven fabric by an ironing device, and scraping and coating the fabric by a coating table device provided with a coating knife.

In the step S1, the thickness of the non-woven fabric is 0.65mm, gram weight is 195g/m ² The burst strength was 17kgf/cm ² (ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:250:15:2:15 are added. The prepared impregnation solution was stirred at a stirring speed of 1000r/min at room temperature for 15 minutes. The viscosity of the prepared impregnation liquid is 140cps. In the impregnation liquid, the resin is hydrolysis-resistant impregnation resin, the solid content of the resin is 30%, the percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400%, and the viscosity is 10 ten thousand. The pressure of the oil-impregnated press roller in the impregnation tank is 5Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 35%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from the following resin: dimethylformamide: fluorine-free filler: hydrolysis-resistant auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:45:3:1.5:2, adding the mixture, and stirring the prepared fabric at a high speed of 1000r/min for 30 minutes at normal temperature. After the fabric is stirred uniformly at a high speed, vacuum defoaming is carried out for 90min at a stirring speed of 250r/min, and the viscosity of the prepared fabric is 9000cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity is 16 ten thousand. The coating gap of the coating knife is 220 filaments. The coating weight of the coating knife was 1.43kg/y.

S2, the non-woven fabric coated with the fabric enters a three-fold coagulation tank for coagulation to obtain synthetic leather; and (4) the synthetic leather coming out of the three-fold coagulation tank enters a washing tank to be washed by water to obtain the bass.

In the step S2, the sugar degree of the coagulation liquid in the triple-reverse-turn coagulation tank is 16%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 28 ℃. Before the synthetic leather enters a rinsing bath, measuring the thickness of the synthetic leather, and controlling the thickness to be 1.45mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.47m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 10%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 0%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 65 ℃.

In the step S3, the pre-ironing temperature of the ironing roll is 100 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.3mm, and the width of the rolled bass is controlled to be 145cm.

Example 2

s1, unreeling non-woven fabrics through a fabric storage rack, allowing the unreeled non-woven fabrics to enter an impregnation tank for impregnation, and allowing the non-woven fabrics to enter a pre-solidification tank for pre-solidification after impregnation; and (3) ironing the pre-solidified non-woven fabric by using an ironing device, and carrying out blade coating on the fabric by using a coating table device provided with a coating knife.

In the step S1, the thickness of the nonwoven fabric is 0.70mm, and the grammage is 200g/m ² The burst strength was 17kgf/cm ² (ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unreeling speed of the cloth storage rack is 9m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide (b): and (3) a tear-resistant auxiliary agent: hydrolysis-resistant auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:250:15:2:15, and stirring the prepared impregnation liquid at a stirring speed of 1200r/min for 18 minutes at normal temperature, wherein the viscosity of the prepared impregnation liquid is 170cps. In the immersion liquid, the resin is water-resistantThe solution type impregnating resin has the solid content of 30 percent, the percent modulus of 60 percent, the tensile strength of more than 35MPa, the elongation of more than or equal to 400 percent and the viscosity of 11 ten thousand. The pressure of the oil-impregnated press roller in the impregnation tank is 5.2Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 36%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5.2Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from the following resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: color paste is prepared by the following components in percentage by weight of 100:45:3:1.5:2, adding the mixture, and stirring the prepared fabric at a high speed of 1300r/min for 32 minutes at normal temperature. After the fabric is uniformly stirred at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 300r/min, and the viscosity of the prepared fabric is 9500cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity is 17 ten thousand. The coating gap of the coating knife was 225 filaments. The coating weight of the coating knife was 1.48kg/y.

S2, the non-woven fabric coated with the fabric enters a three-fold coagulation tank for coagulation to obtain synthetic leather; and (4) the synthetic leather coming out of the three-fold coagulation tank enters a washing tank for washing to obtain the base.

In the step S2, the sugar degree of the coagulation liquid in the triple-reverse-turn coagulation tank is 17%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 30 ℃. Before the synthetic leather enters a rinsing bath, the thickness of the synthetic leather is measured, and the thickness is controlled to be 1.48mm. Before the synthetic leather enters a rinsing bath, measuring the breadth of the synthetic leather, and controlling the breadth at 1.48m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 15%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 5%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 70 ℃.

In the step S3, the pre-ironing temperature of the ironing roller is 110 ℃. The drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.35mm, and the width of the rolled bass is controlled to be 146cm.

Example 3

In the step S1, the thickness of the nonwoven fabric is 0.75mm, and the gram weight is 205g/m ² The burst strength was 17kgf/cm ² (ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is greater than 80% in warp direction and greater than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: and (3) a tear-resistant auxiliary agent: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:250:15:2:15, and the prepared impregnation solution was stirred at a stirring speed of 1500r/min at room temperature for 20 minutes. The viscosity of the prepared impregnation liquid is 200cps. In the immersion liquid, the resin is hydrolysis-resistant immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400 percent, and the viscosity is 12 ten thousand. The pressure of the oil-impregnated press roll in the impregnation tank is 5.5Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 38%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5.5Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide (b): fluorine-free filler: hydrolysis-resistant auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:45:3:1.5:2, adding the mixture, and stirring the prepared fabric at a high speed of 1500r/min for 35 minutes at normal temperature. After the fabric is stirred uniformly at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 350r/min, and the fabric is preparedThe good fabric viscosity is 10000cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity is 18 ten thousand. The coating gap of the coating knife was 230 filaments. The coating weight of the coating knife was 1.53kg/y.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 18%. The temperature of the solidification liquid in the three-fold-back solidification tank is 32 ℃. Before the synthetic leather enters a rinsing bath, the thickness of the synthetic leather is measured, and the thickness is controlled to be 1.50mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.49m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 20%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 10%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 75 ℃.

In the step S3, the pre-ironing temperature of the ironing roller is 120 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the wound bass is controlled to be 1.4mm, and the width of the wound bass is controlled to be 147cm.

Example 4

In the step S1, the thickness of the nonwoven fabric is 0.65mm, and the grammage is 198g/m ² The burst strength was 17kgf/cm ² (ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is greater than 80% in warp direction and greater than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis-resistant auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:250:15:2:15, and stirring the prepared impregnation liquid at the normal temperature at a stirring speed of 1100r/min for 20 minutes to obtain the prepared impregnation liquid with the viscosity of 166cps. In the immersion liquid, the resin is hydrolysis-resistant immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400 percent, and the viscosity is 10.5 ten thousand. The pressure of the oil-impregnated press roll in the impregnation tank is 5Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 36%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5.5Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:45:3:1.5:2, adding the mixture, and stirring the prepared fabric at a high speed of 1400r/min for 30 minutes at normal temperature. After the fabric is stirred uniformly at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 300 r/min. The viscosity of the prepared fabric is 9200cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity is 17.5 ten thousand. The coating gap of the coating knife was 226 filaments. The coating weight of the coating knife was 1.49kg/y.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 17%. The temperature of the solidification liquid in the three-fold-back solidification tank is 31 ℃. Before the synthetic leather enters a rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.48mm. Before the synthetic leather enters a rinsing bath, measuring the breadth of the synthetic leather, and controlling the breadth at 1.47m. The washing tanks comprise 15 groups, the washing sugar degrees of the front six groups of washing tanks are controlled to be 11%, the washing sugar degrees of the middle six groups of washing tanks are controlled to be 8%, and the washing sugar degrees of the rear three groups of washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 72 ℃.

In the step S3, the pre-ironing temperature of the ironing roller is 104 ℃. The drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After drying, the thickness of the wound bass is controlled to be 1.37mm, and the width of the wound bass is controlled to be 145cm.

Example 5

In the step S1, the thickness of the nonwoven fabric is 0.72mm, and the grammage is 204g/m ² The burst strength was 17kgf/cm ² (ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unreeling speed of the cloth storage rack is 9m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide (b): tear resistance aid: hydrolysis-resistant auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:250:15:2:15, adding the prepared impregnation liquid at normal temperatureStirring at 1400r/min for 16 min to obtain the final product with a viscosity of 180cps. In the impregnation liquid, the resin is hydrolysis-resistant impregnation resin, the solid content of the resin is 30%, the percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400%, and the viscosity is 10 ten thousand. The pressure of the oil-impregnated press roll in the impregnation tank is 5.1Kg. The sugar degree of the pre-coagulated solid in the pre-coagulation tank is 38 percent. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5.4Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:45:3:1.5:2, adding the mixture, and stirring the prepared fabric at a high speed of 1500r/min for 33 minutes at normal temperature. After the fabric is uniformly stirred at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 320r/min, and the viscosity of the prepared fabric is 9990cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity is 16 ten thousand. The coating gap of the coating knife is 230 filaments. The coating weight of the coating knife was 1.48kg/y.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 17%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 32 ℃. Before the synthetic leather enters a rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.46mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.49m. The washing tanks comprise 15 groups, the washing sugar degrees of the front six groups of washing tanks are controlled to be 20%, the washing sugar degrees of the middle six groups of washing tanks are controlled to be 6%, and the washing sugar degrees of the rear three groups of washing tanks are 0%. The washing temperature of the last three groups of washing tanks is controlled at 69 ℃.

In the step S3, the pre-ironing temperature of the ironing roll is 114 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.36mm, and the width of the rolled bass is controlled to be 145cm.

Example 6

in the step S1, the thickness of the nonwoven fabric is 0.67mm, and the grammage is 199g/m ² The burst strength was 17kgf/cm ² (ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is greater than 80% in warp direction and greater than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis-resistant auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:250:15:2:15, and stirring the prepared impregnation liquid at a stirring speed of 1500r/min for 19 minutes at normal temperature, wherein the viscosity of the prepared impregnation liquid is 182cps. In the immersion liquid, the resin is hydrolysis-resistant immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400 percent, and the viscosity is 10 ten thousand. The pressure of the oil-impregnated press roll in the impregnation tank is 5.5Kg. The sugar degree of the pre-coagulated solid in the pre-coagulation tank is 35%. The pressure of the pre-solidification oil press roller in the pre-solidification groove is 5.3Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from the following resin: dimethylformamide: fluorine-free filler: hydrolysis-resistant auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:45:3:1.5:2, adding the mixture, and stirring the prepared fabric at normal temperature at 1000r/minHigh speed stirring was carried out for 31 minutes. After the fabric is stirred uniformly at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 260r/min, and the viscosity of the prepared fabric is 9000cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity is 16.7 ten thousand. The coating gap of the coating knife was 225 filaments. The coating weight of the coating knife was 1.50kg/y.

In the step S2, the sugar degree of the coagulation liquid in the triple-reverse-turn coagulation tank is 16.4%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 32 ℃. Before the synthetic leather enters a rinsing bath, measuring the thickness of the synthetic leather, and controlling the thickness to be 1.45mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.49m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 10%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 2%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 75 ℃.

In the step S3, the pre-ironing temperature of the ironing roll is 115 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.3mm, and the width of the rolled bass is controlled to be 146cm.

The fluorine-free anti-siphon high-density synthetic leather is prepared by the production method. The fluorine-free anti-siphon high-density synthetic leather (Bass) prepared by the production method has the advantages that the three-centimeter opposite-sticking peeling performance can reach 120N/3cm, and the softness test value is between 2.3 and 2.5; the dynamic anti-siphon of left, right side sample test respectively, at the pre-deflection processing 3000 times, there is not the infiltration condition, and the static anti-siphon of back test can reach twenty four hours and can not have the climbing phenomenon.

In the invention, the physical property results of the fluorine-free anti-siphon high-density synthetic leather test are as follows:

numbering	Test item	Unit	Test value	Test method
					1	Thickness of	mm	1.30-1.40	AN-PZ-W-055
2	Breadth width	cm	140-142	Measuring tape
					3	Strength at break	kgf/cm2	≥20	AN-PZ-W-060
4	Tensile load	kg/2.54cm	Warp direction is more than or equal to 35 and weft direction is more than or equal to 35	AN-PZ-W-057
					5	Elongation percentage	%	Warp direction: 40-80 weft direction: 60-120	AN-PZ-W-057
6	Normal peel load	N/3cm	Longitude and latitude is more than or equal to 100	AN-PZ-W-052
					7	Trousers type tear	N/3cm	Longitude and latitude is more than or equal to 60	AN-PZ-W-064
8	Peel load with 12H hour hydrolysis resistance	N/3cm	Longitude and latitude is more than or equal to 70	AN-PZ-W-052
					9	Softness value	/	2.1-2.6	AN-PZ-W-061
10	pH value of	/	4.5-7.0	AN-PZ-W-105
					11	2 hours water bath at 60 DEG C	/	Without crazing	AN-PZ-W-052
12	Dynamic water resistance test	/	No water seepage condition after 3000 times of bending treatment	AN-PZ-W-103
					13	Static anti-siphon test	/	No run-up in 24 hours test	AN-PZ-W-133

The following introduces a production device for producing the fluorine-free anti-siphon high-density synthetic leather of the invention:

referring to fig. 1 to 3, the production apparatus includes an unwinding cloth storage rack 1, an impregnation tank 2, a pre-coagulation tank 3, an ironing device 4, a coating table device 5, a triple-folding coagulation tank 6, a rinsing tank 7, an ironing roller 8, a first oven 9, a cooling roller 10, and a winding cloth storage rack 11, which are sequentially disposed along a production line.

In the invention, the unreeling cloth storage rack 1 is used for unreeling non-woven fabrics, and the speed of unreeling is controlled to be 9m/min in order to ensure the permeation of coating slurry.

The impregnation tank 2 is provided with impregnation slurry therein, and the impregnation tank 2 is used for impregnating the non-woven fabric, so that the impregnated non-woven fabric has the effects of good hand feeling, dynamic anti-siphon and the like.

The pre-coagulation tank 3 is internally provided with pre-coagulation liquid, and the pre-coagulation tank 3 is used for pre-coagulation treatment of non-woven fabrics so as to improve the product performance.

The ironing device 4 is used for ironing the non-woven fabric so as to facilitate the subsequent coating operation; the ironing device can adopt six wheels of ironing rollers.

The coating device 5 is used for coating the blended fabric on the non-woven fabric in a blade mode so as to achieve the effects of water resistance, siphon prevention, high elasticity and the like. In a specific embodiment, the coating station device 5 has a coating knife 51, and the non-woven fabric is scraped and coated on the non-woven fabric by the coating knife 51 when the non-woven fabric passes through the coating station device 5. In order to give a certain thickness to the coating layer, the gap between the coating knife 51 and the nonwoven fabric was set to 225 ± 5 filaments.

The three-fold coagulating tank 6 is internally provided with coagulating liquid, and the three-fold coagulating tank 6 is used for coagulating the non-woven fabric coated with the fabric so as to enable the fabric to permeate into the non-woven fabric to form the synthetic leather.

The washing tank 7 is internally provided with a washing liquid, and the washing tank 7 is used for washing the synthetic leather to obtain the bass.

The ironing roller 8 is used for carrying out pre-ironing treatment on the bass; the ironing roller 8 is an eight-wheel ironing roller.

The first oven 9 is used for drying the bass.

The cooling roller 10 is used for cooling the dried bass so as to facilitate rolling. In order to achieve a better cooling effect, the cooling rolls 10 have at least 2.

And the winding cloth storage rack 11 is used for winding the cooled bass.

In the invention, a waterproof agent groove 12 and a second oven 13 are arranged in sequence before the cloth unreeling and storing rack 1. The waterproof agent groove 12 is provided with a water-based waterproof agent therein, and the waterproof agent groove 12 is used for performing waterproof treatment on the non-woven fabric so as to enable the non-woven fabric to obtain a waterproof function. The second oven 13 is used for drying the nonwoven fabric subjected to the waterproof treatment.

In the invention, a first compression roller 14 is arranged between the unreeling cloth storage rack 1 and the impregnation groove 2, and the first compression roller 14 is used for flattening the unreeled non-woven fabric. The impregnation tank 2 and the pre-coagulation tank 3 are provided with a second press roller 15, and the second press roller 15 is used for pressing and rolling the impregnated non-woven fabric.

In the invention, a first guide roller 16 is arranged between the three-fold coagulation tank 6 and the washing tank 7, and the first guide roller 16 is used for guiding the coagulated synthetic leather into the washing tank 7 for washing.

In the present invention, the impregnation tank 2 has an oil-impregnated press roller 21 therein, and the oil-impregnated press roller 21 is used to press the unwound nonwoven fabric into the impregnation tank 2 for impregnation. Since too large or too small a pressure may affect the impregnation effect, the pressure of the oil-impregnated press roller 21 needs to be controlled to be 5-5.5Kg to ensure the impregnation effect, and if too large a pressure may affect the vehicle speed or press the nonwoven fabric to be deformed.

In the present invention, the pre-coagulation tank 3 has a pre-coagulation oil pressure roller 31 therein, and the pre-coagulation oil pressure roller 31 is used for pressing the nonwoven fabric into the pre-coagulation tank 3 for pre-coagulation. Since too large or too small pressure can affect the pre-solidification effect, in order to ensure the pre-solidification effect, the pressure of the pre-solidification oil pressure roller 31 needs to be controlled between 5Kg and 5.5Kg, and if too large pressure can affect the vehicle speed or deform the non-woven fabric, etc.

In the concrete implementation of the invention, in order to achieve a better pre-solidification effect, 5 pre-solidification oil compression rollers 31 are arranged in the pre-solidification tank 3, wherein 3 pre-solidification oil compression rollers 31 are positioned at the position close to the bottom, 2 pre-solidification oil compression rollers 31 are positioned at the position close to the upper part of the liquid level, and the pre-solidification oil compression roller 31 at the bottom and the pre-solidification oil compression roller 31 at the upper part are arranged in a staggered manner. Therefore, the non-woven fabric can be folded back up and down for multiple times in the pre-solidification groove 3, and a better pre-solidification effect is realized.

In the present invention, the three-fold coagulation tank 6 has a coagulation hydraulic roller 61 for performing three-fold from bottom to top, and the coagulation hydraulic roller 61 is used to press the nonwoven fabric into the three-fold coagulation tank 6 and coagulate the nonwoven fabric. In the invention, two ends of the three-fold coagulating tank 6 are respectively provided with 2 coagulating oil pressure rollers 61, and the coagulating oil pressure rollers 61 at two ends are staggered, so that the non-woven fabric can realize three-fold from bottom to top in the three-fold coagulating tank 6. Meanwhile, in order to make the solidification more sufficient and ensure the full penetration of the slurry, the length of the triple-turn solidification tank 6 is set to be 30 meters.

In the invention, the washing tanks 7 are provided with 15 groups, the inlet end and the outlet end of each group of washing tanks 7 are provided with third press rolls 71, and each group of washing tanks 7 are internally provided with washing oil press rolls 72. Wherein, the third press roller 71 is used for carrying out press-binding treatment on the synthetic leather in the water inlet and outlet washing tank 7; the water washing oil pressure roller 72 is used for pressing the synthetic leather into the water washing tank 7 for water washing. The purpose of the invention is to provide 15 groups of rinsing baths 7 in order to fully rinse the synthetic leather, and in the 15 groups of rinsing baths 7, the rinsing sugar degree of the rinsing solution gradually decreases from front to back.

In the present invention, the first oven 9 has 5 sets, and each set of the first oven 9 has the second guide roller 91 therein. In specific implementation, the second guide rollers 91 can be respectively arranged on different sides of the upper end and the lower end of each first oven 9, so that the bass can be bent in a zigzag manner in the first ovens 9, and the drying effect can be improved. Meanwhile, 5 sets of the first ovens 9 are provided to achieve sufficient drying of the bass.

In the present invention, the waterproof agent tank 12 has a waterproof/oilproof roller 121 therein, and the waterproof/oilproof roller 121 presses the nonwoven fabric into the waterproof agent tank 12 to perform the waterproof treatment. The second oven 13 has a third guide roller 131 therein. In specific implementation, the third guiding rollers 131 can be respectively arranged on different sides of the upper end and the lower end of the second oven 13, so that the non-woven fabric can be bent in a zigzag manner in the second oven 13, and the drying effect can be improved.

While specific embodiments of the invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, as equivalent modifications and variations as will be made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the appended claims.

Claims

1. A production method of fluorine-free anti-siphon high-density synthetic leather is characterized by comprising the following steps: the production method comprises the following steps:

s1, unreeling non-woven fabrics through a fabric storage rack, allowing the unreeled non-woven fabrics to enter an impregnation tank for impregnation, and allowing the non-woven fabrics to enter a pre-solidification tank for pre-solidification after impregnation; the pre-solidified non-woven fabric is subjected to ironing treatment by an ironing device and then is subjected to surface fabric blade coating treatment by a coating table device provided with a coating knife; before the non-woven fabric is unreeled, performing waterproof treatment on the non-woven fabric through a water-based waterproof agent, and drying the non-woven fabric subjected to waterproof treatment;

in step S1, the impregnation solution in the impregnation tank is prepared as resin: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:250:15:2:15, adding; in the impregnation liquid, the resin is hydrolysis-resistant impregnation resin, the solid content of the resin is 30 percent, the percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400 percent, and the viscosity range is 10-12 ten thousand;

in the step S1, the blade-coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100:45:3:1.5:2, adding; in the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity range is 16-18 ten thousand;

s2, the non-woven fabric coated with the fabric enters a three-fold solidification tank to be solidified to obtain synthetic leather; the synthetic leather coming out of the triple-fold coagulating tank enters a washing tank to be washed by water to obtain bass;

2. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the thickness of the non-woven fabric is 0.65-0.75mm.

3. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 2, characterized in that: the gram weight of the non-woven fabric is 195-205g/m ² 。

4. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 3, characterized in that: the burst strength of the nonwoven fabric was 17kgf/cm ² 。

5. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 4, characterized in that: the tensile strength of the non-woven fabric is greater than 120N in the warp direction and greater than 70N in the weft direction.

6. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 5, characterized in that: the elongation at break is more than 80% in warp direction and more than 170% in weft direction.

7. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the thickness of the non-woven fabric is 0.85-0.95mm.

8. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 7, characterized in that: the gram weight of the non-woven fabric is 235-245g/m ² 。

9. The method for producing fluorine-free anti-siphon high-density synthetic leather according to claim 8, wherein the method is characterized in thatCharacterized in that: the burst strength of the nonwoven fabric was 18kgf/cm ² 。

10. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 9, characterized in that: the tensile strength of the non-woven fabric is greater than 140N in the warp direction and greater than 80N in the weft direction.

11. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 10, characterized in that: the elongation at break is greater than 90% in warp direction and greater than 190% in weft direction.

12. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the unreeling speed of the cloth storage rack is 9m/min.

13. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: the prepared impregnation liquid is stirred for 15-20 minutes at the normal temperature at the stirring speed of 1000-1500 r/min.

14. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 13, characterized in that: the viscosity of the prepared impregnation liquid is between 140 and 200cps.

15. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 14, characterized in that: in the step S1, the pressure of the oil-impregnated press roller in the impregnation tank is between 5 and 5.5Kg.

16. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the sugar degree of the pre-solidified liquid in the pre-solidification tank is 35 to 38%.

17. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the pressure of the pre-solidification oil press roller in the pre-solidification groove is between 5 and 5.5Kg.

18. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the ironing temperature of the ironing device is 50 ℃.

19. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: the prepared fabric is stirred at high speed for 30-35 minutes at the stirring speed of 1000-1500r/min at normal temperature.

20. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 19, characterized in that: after the fabric is stirred uniformly at a high speed, vacuum defoaming is carried out for 90min at a stirring speed of 300 +/-50 r/min.

21. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 20, characterized in that: the viscosity of the prepared fabric is 9000cps-10000 cps.

22. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the coating gap of the coating knife is between 225 +/-5 filaments.

23. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the coating weight of the coating knife is between 1.48 +/-0.05 kg/y.

24. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S2, the sugar degree of the coagulation liquid in the triple-reverse-turn coagulation tank is 16-18%.

25. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S2, the temperature of the coagulation liquid in the triple-turn coagulation tank is 30 ± 2 ℃.

26. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S2, before the synthetic leather enters the rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.45-1.50 mm.

27. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 26, characterized in that: in the step S2, before the synthetic leather enters the rinsing bath, the width of the synthetic leather is measured and controlled to be 1.47-1.49 m.

28. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S2, the water washing tanks have 15 sets.

29. The method for producing fluorine-free anti-siphon high-density synthetic leather according to claim 28, wherein: in the 15 groups of rinsing baths, the rinsing sugar degrees of the first six groups of rinsing baths are controlled to be between 20 and 10 percent, the rinsing sugar degrees of the middle six groups of rinsing baths are controlled to be between 10 and 0 percent, and the rinsing sugar degrees of the last three groups of rinsing baths are 0 percent.

30. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 29, characterized in that: the washing temperature of the last three groups of washing tanks is controlled at 70 +/-5 ℃.

31. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S3, the pre-ironing temperature of the ironing roller is 110 +/-10 ℃.

32. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S3, the oven has 5 sets.

33. The method for producing fluorine-free anti-siphon high-density synthetic leather according to claim 32, wherein: in 5 groups of drying ovens, the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃.

34. The method for producing fluorine-free anti-siphon high-density synthetic leather according to claim 33, wherein: after the drying is finished, the thickness of the rolled bass is controlled to be 1.3-1.4 mm.

35. The method for producing fluorine-free anti-siphon high-density synthetic leather according to claim 34, wherein the method comprises the following steps: and after drying is finished, the width of the wound bass is controlled to be 145-147 cm.

36. A fluoride-free anti-siphon high-density synthetic leather is characterized in that: the fluorine-free anti-siphon high-density synthetic leather is prepared by the production method according to any one of claims 1 to 35.