CN102747608A - Post-treatment method for PU synthetic leather - Google Patents
Post-treatment method for PU synthetic leather Download PDFInfo
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- CN102747608A CN102747608A CN2012102039685A CN201210203968A CN102747608A CN 102747608 A CN102747608 A CN 102747608A CN 2012102039685 A CN2012102039685 A CN 2012102039685A CN 201210203968 A CN201210203968 A CN 201210203968A CN 102747608 A CN102747608 A CN 102747608A
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Abstract
The invention discloses a post-treatment method for PU synthetic leather. According to the method, various post-treatment technology, concretely comprises a spraying process, a leather grinding process, a line rubbing process, a surface printing process, a surface polishing process and a printing process, are added based on dry and wet processes of current technology. The PU synthetic leather post-treated by the method has greatly improved flexibility, vertical sense, straight sense, lines and patterns; and the using effect of the PU synthetic leather is closer to, even better than leather.
Description
Technical field
The present invention relates to a kind of post-processing approach of PU synthetic leather, belong to synthetic leather manufacturing technology field.
Background technology
Its outward appearance of PU synthetic leather product and internal performance and natural leather are quite similar, and light weight and tough and tensile has good springiness, brute force is high, heat-resisting and cold-resistant and chemical resistance good, it is painted to be easy to, rich color, advantage such as easy to process.Generally, PU synthetic leather products include surface finishing layer, a colored layer, micro-porous layer base fabric and imitation leather Lu structural layer.
PU synthetic leather tool is purposes widely; Because it has base cloth various in style; Versicolor lines; Have batch the characteristics stable, that whole processing performance is good simultaneously, therefore, be widely used in every field such as shoe industry, case and bag manufacturing industry, garment manufacturing industry, furniture and decoration sector and sports goods, military project, medicine, aviation.Total demand annual requirement 1500000000 m of present domestic synthetic leather prediction
2More than, clothing leather 5.16 hundred million m wherein
2, footwear are removed from office 5.64 hundred million m
2, luggage leather 4.16 hundred million m
2Estimate that demand will keep 10% growth rate in following 5 to 10 years.
At present, the production technology of synthetic leather is main with wet method, dry technology for production mainly.The principle of wet processing is that water-base resin is coated onto on the special-purpose wet separation cloth, and strip off PU (polyurethane) layer also is attached on the nonwoven fabric, obtains semi-finished product (bass) through oven dry.The principle of dry process is that use is resin-coated on the release liners of various lines, after taking off the film on the paper, irons above the semi-finished product (bass) with high temperature again.The production technology of PU synthetic leather then is the combined type production technology of dry method after the first wet method of employing.The outward appearance of the synthetic leather of this explained hereafter and internal performance and natural leather are quite similar, than the better quality of the PU synthetic leather product of simple wet method or dry production, more stable.
Postprocessing working procedures is also referred to as surface treatment procedure, is a technology that more and more comes into one's own in synthetic leather production.Its section processes technology is to introduce from textile industry, more is to be introduced by the corium treatment technology; Purpose be for make synthetic leather from aspects such as outward appearance, decorative pattern, colors more as natural leather.
Make the field at synthetic leather, not all finished product leather all need pass through postprocessing working procedures.According to difference, can carry out the selectivity post processing to the part synthetic leather, thereby promote the added value of its finished product product quality and performance requirement.For example, can be according to specifically to the requirement of outward appearance, decorative pattern or color, select a kind of, two or three postprocessing working procedures to make up targetedly, the not strict sequence arrangement of treatment combination operation thereafter, the synthetic leather after the post processing can be put in storage through check.
The PU synthetic leather is owing to receive the restriction of release liners surface texture, and its color effects is unsatisfactory sometimes.For vividness that increases PU synthetic leather color and the expressive force that improves color, carry out post processing through its surface being carried out methods such as single stamp, embossing, spraying or sanding usually.Generally speaking, in the production technology of present existing these PU synthetic leather, some has aftertreatment technology, and some does not have aftertreatment technology.What aftertreatment technology was arranged is main with very simple post-processing technology just also, can not satisfy the diversified demand of product post processing, can not reach the requirement of existing market.
Therefore, those skilled in the art is devoted to develop a kind of diversified post processing production method of PU synthetic leather post processing that improved.
Summary of the invention
Because the above-mentioned defective of prior art, technical problem to be solved by this invention provides a kind of postprocessing working procedures to the PU synthetic leather and carries out the method that variation is handled.
For realizing above-mentioned purpose, the invention provides a kind of post-processing approach of diversified PU synthetic leather.This method is on the basis of dry method, wet processing, to have increased diversified aftertreatment technology, is intended to improve the flexibility of product, the sense of hanging down, very sense, lines, style etc., thereby makes the result of use of PU synthetic leather more near corium, even better effects if.
The post-processing approach of PU synthetic leather of the present invention is to solve above-mentioned technical problem through the method that multiple postprocessing working procedures is combined.
Particularly, the post-processing approach of PU synthetic leather of the present invention comprises following five kinds of operations: spraying process, mill skin operation, rub line operation, surface printing preface, surface finish operation and printing process.
1. spraying process: be also referred to as spray light operation, it is introduced from the corium Treatment Technology.In concrete technical scheme of the present invention, spraying process is in the whitewashing drying machine of computer control, to carry out.Particularly, after the spray liniment allotment with resin, pigment and solvent composition, be transported in the spray booth through liquor pump; Through the automatic control of computer PU synthetic leather surface is sprayed then, spraying rate is 12 m/min; PU synthetic leather after the spraying is put into oven for drying, and oven temperature is controlled at about 80 ℃.Preferably, the waste gas water spray absorption system that spraying process also is provided with and the drying machine of whitewashing is supporting is in order to collect, to handle the solvent waste gas in the oven for drying process.Can produce very special surface color effect and surface touch through the reprocessed PU synthetic leather of spraying process.
The formula optimization of spray liniment is water-base resin, water-based color and distilled water, and three preferable is combined as water-base resin, water-based color and the distilled water that volume ratio is 100:1:2.
In preferred embodiments of the present invention, between the drying machine of will whitewashing is set up and worked independently, and keep the little negative pressure of workplace, can guarantee the air ambient of PU synthetic leather workshop so effectively.
2. grind the skin operation: be also referred to as mill line operation.Post-processing approach of the present invention realizes grinding the skin operation through the back side sanding to the PU synthetic leather, and this operation does not relate to the use of any solvent.The PU synthetic leather can make it in appearance more near the corium leather after overground skin operation is handled, and also can produce many high value-added products such as ox Ba Ge, napping leather etc. simultaneously.In preferred embodiments of the present invention, also be provided with the sack cleaner supporting in this mill skin operation, in order to remove the mill skin dust that produces in the mill skin process with decorticating mill.
3. rub the line operation: the PU synthetic leather that will grind behind the skin directly falls line (dry rub) in dry rub machine, staking machine, do not use any solvent; Or in rotary drum, add water and carry out tanning, thereby water is tanned and is put into the dry rub machine again and rubs to do and make the soft of PU synthetic leather.The surface detail of the PU synthetic leather after the falling line nature that more becomes, and have the irregular pattern on natural leather surface, obviously improved value-added content of product.
Water is tanned and is directly used clear water generally speaking, when still second-rate as if pending PU synthetic leather, then need in water, suitably add the softener of 0 ~ 10% percentage by weight, as preferably, can in water, add the softener of 2 % percentage by weights.
4. surface printing preface: this operation is carried out on embossing machine, polishing machine.Wherein, embossing operation has cold type embossing, two kinds of operations of hot type embossing.Said hot type embossing is for feeding the hot type embossing of steam.
5. surface finish operation: thus polishing process is a cloth rewinder roll through high-speed rotation to be contacted with PU synthetic leather surface, rubbing makes the process of PU synthetic leather surface-brightening, does not relate to the use of any solvent.This polishing process is similar to the process of polishing shoes in the daily life.
Surface printing preface of the present invention, surface finish operation except that the PU synthetic leather is carried out embossed surface, the surface is changed colour, is changed the gloss, also can improve the feel and the impression of PU synthetic leather, makes its surface touch more resemble natural leather.
6. printing process: be to carry out a kind of the most frequently used technology of synthetic leather surface-treated, on two editions, three editions printing treatment machines, carry out through screen roller.Particularly, PU synthetic leather surface contacts with the slurry tank that work such as printing ink, coating slurry is housed through rolling bar, and working slurry slowly is coated in the surface of PU synthetic leather, then the PU synthetic leather is inserted baking oven to dry, and oven temperature is controlled at about 130 ℃.This operation also can improve feel and impression such as oily wax sense, the smooth feeling etc. of PU synthetic leather except that making PU synthetic leather surface change colour, change the gloss, makes PU synthetic leather surface touch more resemble corium.
Working slurry in the printing process is coated in before the PU synthetic leather surface; Adopt organic solvent working slurry to be diluted wherein a kind of or wherein several the combination in the preferred butanone of said organic solvent, dimethyl formamide, acetone, methyl acetate, butyl acetate and the cyclohexanone earlier.
Before the working slurry with different colours is coated in said PU synthetic leather surface, clean rolling bar, clean and adopt acetone, butanone or dimethyl formamide equal solvent, the organic solvent after the cleaning can store the back and reuse.
The whitewashing drying machine that the present invention selected for use, decorticating mill, dry rub machine, staking machine, embossing machine, polishing machine, printing treatment machine are present technique field equipment commonly used, to this not special restriction.
With respect to the no aftertreatment technology of PU synthetic leather of the prior art or aftertreatment technology very briefly, the post-processing approach of PU synthetic leather of the present invention combines multiple postprocessing working procedures, has realized the variation of synthetic leather post processing.Through the reprocessed PU synthetic leather of the inventive method, its product can satisfy the diversified demand of product treatment, also can reach the requirement of existing market.And the inventor also finds, behind the post-processing approach of taking multiple postprocessing working procedures is combined; The result of use of PU synthetic leather is better than the only PU synthetic leather after single treatment process is handled far away; And its result of use is more near corium, even better than leather effect.
The specific embodiment
The PU synthetic leather that present embodiment adopts is the PU synthetic leather that the combined type production technology of dry method is produced after the first wet method of employing.Used whitewashing drying machine, decorticating mill, dry rub machine, staking machine, embossing machine, polishing machine, printing treatment machine are present technique field equipment commonly used.
A kind of post-processing approach of PU synthetic leather comprises following operation:
1. spraying process: be also referred to as spray light operation, it is introduced from the corium Treatment Technology.In concrete technical scheme of the present invention, spraying process is in the whitewashing drying machine of computer control, to carry out.Particularly, after the spray liniment of resin, pigment and solvent composition allocated by a certain percentage, be transported to through liquor pump in the spray booth of whitewashing drying machine; Through the automatic control of computer PU synthetic leather surface is sprayed then, spraying rate is 12 m/min; PU synthetic leather after the spraying is put into oven for drying, and oven temperature is controlled at about 80 ℃.Preferably, the waste gas water spray absorption system that spraying process also is provided with and the drying machine of whitewashing is supporting is in order to collect, to handle the solvent waste gas in the oven for drying process.Can produce very special surface color effect and surface touch through the reprocessed PU synthetic leather of spraying process.
The formula optimization of spray liniment is water-base resin, water-based color and distilled water, and three preferable is combined as water-base resin, water-based color and the distilled water that volume ratio is 100:1:2.
In preferred embodiments of the present invention, between the drying machine of will whitewashing is set up and worked independently, and keep the little negative pressure of workplace, can guarantee the air ambient of PU synthetic leather workshop so effectively.
2. grind the skin operation: be also referred to as mill line operation.Post-processing approach of the present invention realizes grinding the skin operation through the back side sanding to the PU synthetic leather, and this operation does not relate to the use of any solvent.The PU synthetic leather can make it in appearance more near the corium leather after overground skin operation is handled, and also can produce many high value-added products such as ox Ba Ge, napping leather etc. simultaneously.In preferred embodiments of the present invention, also be provided with the sack cleaner supporting in this mill skin operation, in order to remove the mill skin dust that produces in the mill skin process with decorticating mill.
3. rub the line operation: the PU synthetic leather that will grind behind the skin directly falls line (dry rub) in dry rub machine, staking machine, do not use any solvent; Or in rotary drum, add water and carry out tanning, thereby water is tanned and is put into the dry rub machine again and rubs to do and make the soft of PU synthetic leather.The surface detail of the PU synthetic leather after the falling line nature that more becomes, and have the irregular pattern on natural leather surface, obviously improved value-added content of product.
Water is tanned and is directly used clear water generally speaking, when still second-rate as if pending PU synthetic leather, then need in water, suitably add the softener of 0 ~ 10% percentage by weight, as preferably, can in water, add the softener of 2 % percentage by weights.
4. surface printing preface: this operation is carried out on embossing machine, polishing machine.Wherein, embossing operation has cold type embossing, two kinds of operations of hot type embossing.Said hot type embossing is for feeding the hot type embossing of steam.
5. surface finish operation: thus polishing process is a cloth rewinder roll through high-speed rotation to be contacted with PU synthetic leather surface, rubbing makes the process of PU synthetic leather surface-brightening, does not relate to the use of any solvent.This polishing process is similar to the process of polishing shoes in the daily life.
Surface printing preface of the present invention, surface finish operation except that the PU synthetic leather is carried out embossed surface, the surface is changed colour, is changed the gloss, also can improve the feel and the impression of PU synthetic leather, makes its surface touch more resemble natural leather.
6. printing process: be to carry out a kind of the most frequently used technology of synthetic leather surface-treated, on two editions, three editions printing treatment machines, carry out through screen roller.Particularly, PU synthetic leather surface contacts with the slurry tank that work such as printing ink, coating slurry is housed through rolling bar, and working slurry slowly is coated in the surface of PU synthetic leather, then the PU synthetic leather is inserted baking oven to dry, and oven temperature is controlled at about 130 ℃.This operation also can improve feel and impression such as oily wax sense, the smooth feeling etc. of PU synthetic leather except that making PU synthetic leather surface change colour, change the gloss, makes PU synthetic leather surface touch more resemble corium.
In the specific embodiment of the present invention; Working slurry in the printing process is coated in before the PU synthetic leather surface; Adopt organic solvent working slurry to be diluted wherein a kind of or wherein several the combination in the preferred butanone of said organic solvent, dimethyl formamide, acetone, methyl acetate, butyl acetate and the cyclohexanone earlier.
In preferred embodiments of the present invention; Before the working slurry with different colours is coated in said PU synthetic leather surface; Clean rolling bar, clean and adopt acetone, butanone or dimethyl formamide equal solvent, the organic solvent after the cleaning can store the back and reuse.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variation.Therefore, all technical staff in the art all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology through the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. the post-processing approach of a PU synthetic leather is characterized in that, comprises following operation:
1. spraying process: can make PU synthetic leather surface produce the special color effects and the spray liniment of sense of touch in the spraying of the surface of pending PU synthetic leather, the PU synthetic leather after spraying sent in the baking oven dried;
2. grind the skin operation: the PU synthetic leather of above-mentioned oven dry is placed decorticating mill, sanding is carried out at its back side;
3. rub the line operation
:The above-mentioned PU synthetic leather of handling through sanding is fallen line through dry rub machine and staking machine in proper order; Or
To put into rotary drum through the PU synthetic leather that sanding is handled and carry out water and tan, rub dried through the dry rub machine again;
4. surface printing preface: carry out embossing through the PU use for synthetic leather embossing machine of rubbing line with above-mentioned;
5. surface finish operation: place polishing machine with above-mentioned through the PU of embossing synthetic leather, thereby through the cloth rewinder roll of high-speed rotation contact with the surface of said PU synthetic leather, rubbing makes its surface-brightening;
6. printing process
:Above-mentioned PU synthetic leather through polishing is placed on the printing treatment machine, working slurry slowly is coated in PU synthetic leather surface, dry through baking oven again through the printing treatment machine.
2. post-processing approach as claimed in claim 1 is characterized in that, said spray liniment is the mixture of water-base resin, water-based color and distilled water.
3. the post-processing approach of a kind of PU synthetic leather as claimed in claim 1; It is characterized in that; In the said spraying process; Automatically control the whitewashing drying machine through computer PU synthetic leather surface is sprayed, and be provided with the water spray absorption system of the spray liniment waste gas that is used for collecting, handle the oven for drying process; Said whitewashing drying machine places the working environment of negative pressure to carry out spraying operation.
4. the post-processing approach of a kind of PU synthetic leather as claimed in claim 3 is characterized in that, the spraying rate of said whitewashing drying machine is 12 m/min; Temperature of oven in the spraying process is controlled at 80 ℃.
5. the post-processing approach of a kind of PU synthetic leather as claimed in claim 1 is characterized in that, in the said mill skin operation, also is provided with and the supporting sack cleaner of said decorticating mill.
6. the post-processing approach of a kind of PU synthetic leather as claimed in claim 1 is characterized in that, said rubbing in the line operation carried out water when tanning in rotary drum, be added with the softener of 2 % percentage by weights in the water in the rotary drum.
7. the post-processing approach of a kind of PU synthetic leather as claimed in claim 1 is characterized in that, the working slurry in the said printing process is the coating through organic solvent diluting.
8. the post-processing approach of a kind of PU synthetic leather as claimed in claim 7 is characterized in that, said organic solvent is a kind of or wherein several the combination in butanone, dimethyl formamide, acetone, methyl acetate, butyl acetate and the cyclohexanone.
9. the post-processing approach of a kind of PU synthetic leather as claimed in claim 1 is characterized in that, in the said printing process, needs to adopt acetone, butanone or dimethyl formamide that the bar that rolls of printing treatment machine is cleaned earlier.
10. the post-processing approach of a kind of PU synthetic leather as claimed in claim 1 is characterized in that, the temperature of oven in the said printing process is controlled at 130 ℃.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252970A (en) * | 2013-04-15 | 2013-08-21 | 严祥成 | Manufacturing method of multicolored leather |
| CN104772999A (en) * | 2015-04-02 | 2015-07-15 | 西安航天华阳机电装备有限公司 | Satellite intaglio printing method |
| CN105730005A (en) * | 2016-02-24 | 2016-07-06 | 肖调升 | Method for rapidly manufacturing outer skin of personally-tailored sports ball |
| CN105821165A (en) * | 2015-01-04 | 2016-08-03 | 焦作隆丰皮草企业有限公司 | Sheared sheepskin product with dry-milled glaze |
| CN106702751A (en) * | 2017-02-10 | 2017-05-24 | 广州益合康贸易有限公司 | Carving and coloring process of artificial leather |
| CN106948193A (en) * | 2017-04-28 | 2017-07-14 | 广州市鸿峥实业有限公司 | The preparation method of brown cladding |
| CN106978739A (en) * | 2017-04-28 | 2017-07-25 | 广州市鸿峥实业有限公司 | The preparation method of dark-brown cladding with water scrub function |
| CN107022910A (en) * | 2017-04-28 | 2017-08-08 | 广州市鸿峥实业有限公司 | The preparation method of light brown cladding modelled after an antique |
| CN107090727A (en) * | 2017-04-28 | 2017-08-25 | 广州市鸿峥实业有限公司 | The preparation method of light brown cladding with water scrub function |
| CN107987700A (en) * | 2017-12-12 | 2018-05-04 | 广州宝礼伽新材料有限公司 | A kind of back cover coating paste and its application process |
| CN108086007A (en) * | 2016-11-19 | 2018-05-29 | 江苏天成超纤革业有限公司 | A kind of decorative pattern Process for producing leather |
| CN109371701A (en) * | 2018-10-22 | 2019-02-22 | 江西泽晞新材料有限公司 | A kind of environment-friendly type aqueous synthetic leather rubs line technique |
| CN111051539A (en) * | 2018-03-13 | 2020-04-21 | K H 出口印度私人有限公司 | Edge embossing of leather substrates and methods therefor |
| CN114318883A (en) * | 2021-12-31 | 2022-04-12 | 漳州香洲皮革有限公司 | Method for manufacturing multicolor line embossed leather |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252970A (en) * | 2013-04-15 | 2013-08-21 | 严祥成 | Manufacturing method of multicolored leather |
| CN105821165A (en) * | 2015-01-04 | 2016-08-03 | 焦作隆丰皮草企业有限公司 | Sheared sheepskin product with dry-milled glaze |
| CN104772999A (en) * | 2015-04-02 | 2015-07-15 | 西安航天华阳机电装备有限公司 | Satellite intaglio printing method |
| CN105730005A (en) * | 2016-02-24 | 2016-07-06 | 肖调升 | Method for rapidly manufacturing outer skin of personally-tailored sports ball |
| CN108086007A (en) * | 2016-11-19 | 2018-05-29 | 江苏天成超纤革业有限公司 | A kind of decorative pattern Process for producing leather |
| CN106702751A (en) * | 2017-02-10 | 2017-05-24 | 广州益合康贸易有限公司 | Carving and coloring process of artificial leather |
| CN106978739A (en) * | 2017-04-28 | 2017-07-25 | 广州市鸿峥实业有限公司 | The preparation method of dark-brown cladding with water scrub function |
| CN107022910A (en) * | 2017-04-28 | 2017-08-08 | 广州市鸿峥实业有限公司 | The preparation method of light brown cladding modelled after an antique |
| CN107090727A (en) * | 2017-04-28 | 2017-08-25 | 广州市鸿峥实业有限公司 | The preparation method of light brown cladding with water scrub function |
| CN106948193A (en) * | 2017-04-28 | 2017-07-14 | 广州市鸿峥实业有限公司 | The preparation method of brown cladding |
| CN107987700A (en) * | 2017-12-12 | 2018-05-04 | 广州宝礼伽新材料有限公司 | A kind of back cover coating paste and its application process |
| CN111051539A (en) * | 2018-03-13 | 2020-04-21 | K H 出口印度私人有限公司 | Edge embossing of leather substrates and methods therefor |
| CN109371701A (en) * | 2018-10-22 | 2019-02-22 | 江西泽晞新材料有限公司 | A kind of environment-friendly type aqueous synthetic leather rubs line technique |
| CN114318883A (en) * | 2021-12-31 | 2022-04-12 | 漳州香洲皮革有限公司 | Method for manufacturing multicolor line embossed leather |
| CN114318883B (en) * | 2021-12-31 | 2023-10-10 | 漳州香洲皮革有限公司 | Manufacturing method of patterned leather with colorful lines |
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Application publication date: 20121024 |