CN109576420A - A kind of leather repairing method - Google Patents
A kind of leather repairing method Download PDFInfo
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- CN109576420A CN109576420A CN201811199965.2A CN201811199965A CN109576420A CN 109576420 A CN109576420 A CN 109576420A CN 201811199965 A CN201811199965 A CN 201811199965A CN 109576420 A CN109576420 A CN 109576420A
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- leather
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- soft
- mending
- concussion
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C11/00—Surface finishing of leather
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The present invention relates to tanning chemistries and field of engineering technology, a kind of leather repairing method is provided, polyurethane foam resin material is introduced mending to hurt in mending agente used, construct a kind of mending agente of hollow system, mending agente density declines and excellent strength is stablized, to form elastic stability body, mending agente is made to be filled in crust leather defect or disability position securely in combination with mechanically actuateds such as roller coating, press polish, it not only overcomes tradition and mends and hurt coating intolerant to the technological deficiency fallen, be easily recessed, and can reduce the production cycle, improve production efficiency.
Description
Technical field
The present invention relates to tanning chemistry and field of engineering technology, in particular to a kind of leather repairing method.
Background technique
Wound is mended, i.e., modifies the natural defect or disability of raw material skin using mending agente masking property, such as thorn scratches, tinea spot,
And because tanning production technique, mechanically actuated control the defect or disability of improper generation, such as asperities, dyeing defect, color difference, to mention
The rate of grade of high leather and out sanction rate.Mending agente is multicomponent mixture, film performance be not determined by a certain component, and
It is the synthesis result of each component, therefore in actual production should be according to crust leather defect or Invalidism and the requirement of resultant Leather style
Carefully selection benefit hurts material and benefit hurts method, to reach required performance.The basis that wound is entire coatings is mended, it is traditional
Although mending agente can fill and lead up the defect or disability of crust leather grain, coating exists intolerant to the technological deficiency fallen, be easily recessed.
Summary of the invention
Therefore, for above-mentioned problem, the present invention proposes a kind of leather repairing method, introduces mending to hurt in mending agente used
Polyurethane foam resin material constructs a kind of mending agente of hollow system, and mending agente density declines and excellent strength is stablized, thus
Elastic stability body is formed, makes mending agente be filled in crust leather defect or wound securely in combination with mechanically actuateds such as roller coating, press polish
Remnants of defeated troops position not only overcomes tradition and mends and hurt coating intolerant to the technological deficiency fallen, be easily recessed, but also can reduce the production cycle, mentions
High efficiency.
To realize above-mentioned technical problem, the solution that the present invention takes are as follows: a kind of leather repairing method successively includes such as
Lower process: crust leather concussion draws soft → dry vacuum → buffing → dedusting is washed one's face → to mend wound → standing → polishing → press polish → ironing → shake
Swing draw it is soft → fall soft → toggling, wherein mend that hurt the parts by weight of component of mending agente used be water 180-250 parts, casein 25-40
Part, 20-35 parts of pigment paste, 55-80 parts of repairing paste, oily wax assistant 20-45 parts, 35-50 parts of polyurethane resin, Foamex 15-
30 parts, 2-5 parts of crosslinking agent.
Further, the repairing paste is the composite material of polyurethane resin, mineral oil and synthetic wax.
Further, the polyurethane resin is aromatic polyurethane resins lotion, dispersion liquid or aqueous solution.
Further, the Foamex is polyurethane foam resin.
Further, the preparation method of the mending agente are as follows: water and casein are mixed first, at this time the dosage of water
For the 20-35% of the parts by weight total amount of water, stirring condition is revolving speed 900-1200r/min, time 15-20min；Secondly in order
Pigment paste, repairing paste, oily wax assistant is added, is stirred, stirring condition is revolving speed 900-1200r/min, time 15-20min；
Then remaining water is added, and sequentially adds polyurethane resin, Foamex, is stirred, stirring condition is revolving speed 900-
1200r/min, time 15-20min；It is eventually adding crosslinking agent, is stirred, stirring condition is revolving speed 900-1200r/min, when
Between 15-20min, finally stand 2-5h.
Further, the leather repairing method specifically:
(1) crust leather concussion is drawn soft: it is 5-6 grades that soft intensity is drawn in concussion；
(2) dry vacuum: dry vacuum condition is 40-45 DEG C/90-120 seconds/vacuum degree-(0.05-0.1) Mpa；
(3) buffing: being handled crust leather flesh noodles using 320 mesh sand paper, using 600 mesh sand paper to crust leather grain defect or
Disability position is handled；The control of crust leather moisture content is in 15-20% when buffing；
(4) dedusting is washed one's face；
(5) wound: mending agente roller coating is mended, mending agente coated weight is 10-15g/sf；
(6) it stands: time of repose 6-9h；
(7) it polishes；
(8) press polish: rolling condition is 125-140 DEG C/35-50kgf/4-7 second, and the moisture content of crust leather, which controls, when press polish exists
15-20%；
(9) ironing: ironing conditions are 125-140 DEG C/20-35kgf, and the moisture content of crust leather is controlled in 15- when ironing
20%；
(10) concussion is drawn soft: it is 5-6 grades that soft intensity is drawn in concussion；
(11) fall soft: falling the soft time is 10-15h；
(12) toggling: toggling condition is 40-55 DEG C/4-7cm/25-30min.
By using preceding solution, the invention has the advantages that the leather repairing method is relative to existing skill
There are following advantages for art:
(1) recess that mending agente when hurting enters crust leather defect or disability position is mended in the prior art, by defect or disability
Position is filled and led up, so that crust leather grain is flat and smooth, but with the volatilization of moisture in mending agente, defect or disability position after mending wound
Recess it can go down again, and method of the technology of the present invention by introducing Foamex in mending agente, by the heat of Foamex
Foaming effect makes up secondary recess caused by due to mending agente moisture evaporation, so that coating masks are good, grain is flat and smooth,
To improve the yield of leather and utilization rate of leather.
(2) Foamex can release low molecule gaseous material through high temperature press polish, ironing processing, can be with its in mending agente
Its component forms a kind of elastic stability body, is filled in crust leather defect or disability position securely, is not easy to be recessed, fall off.
(3) casein is due to containing a large amount of-NH2,-COOH group, chemical nature and leather collagen fiber are close, can be with crust leather
Firm connection improves priming coat bonding force, and casein has the function of protecting colloid, and point of each component in mending agente can be improved
Dissipate stability；Repairing paste is the composite material of gatch, can reduce the dosage of oily wax assistant in mending agente；Repairing paste, oily wax help
Agent is handled through high temperature press polish, ironing, inside partial penetration to crust leather, in conjunction with collagenous fibres, is partially formed a film in crust leather grain；Virtue
Fragrant race's polyurethane resin has excellent adhesiveness, can further improve the bonding force of coating, and resin film forming is thin, soft, thin
It causes, has extensibility, grain excessive loads will not be made.
(4) uniformity of crust leather thickness can be improved in fluffing, and dry vacuum can be improved leather surface flatness, fineness, each contribute to
The uniformity that mending agente is distributed in leather surface when roller coating operation；Roller coating can accurately control coated weight, coating and crust leather adhesion jail
Gu and the loss of mending agente can be reduced, reduce pollution to air and water source；The fuel factor that polishing generates facilitates mending agente
Film forming, and be firmly combined with crust leather, and high-speed friction can remove the remaining mending agente of crust leather grain, crust leather grain after polishing
It is soft glossy, smooth careful.
Therefore, using leather repairing method of the present invention, leather coating is thin soft, retains the natural graining of leather, and product is true
Skin sense is strong；Coating it is resistance to it is dry fall, be not easy to be recessed, fall off；Coating has very strong filling a vacancy property and covering power, and product yield of leather is high, benefit
It is high with rate height, class；Coating has good adhesiveness and interior adhesiveness, does not fall slurry, will not produce to subsequent middle layer, top finishing
Raw negative effect；And oily wax assistant dosage reduces 8~10% in method implementation process, reduces the production cycle and improves production effect
Rate.
Specific embodiment
The present invention is specifically described below by specific embodiment, whereby to the present invention how applied technology method
Technical problem is solved, and the realization process for reaching technical effect can fully understand and implement, it is necessary to indicated herein
It is that the present embodiment is served only for that invention is further explained, should not be understood as limiting the scope of the invention, the neck
The person skilled in the art in domain can make some nonessential modifications and adaptations according to the content of aforementioned present invention.
Unless otherwise specified, the conventional hand that technological means employed in embodiment is well known to those skilled in the art
Section, used reagent and product are also available commercial.The various processes and method being not described in detail are in this field
Well known conventional method, the source of agents useful for same, trade name and it is necessary to list its constituent person, on the first appearance
It indicates.
Embodiment 1
A kind of leather repairing method, successively comprises the following steps:
(1), crust leather concussion is drawn soft: it is 5 grades that soft intensity is drawn in concussion；
(2), dry vacuum: 40 DEG C of dry vacuum temperature, the dry vacuum time 90 seconds, vacuum degree -0.1Mpa；
(3), buffing: fluffing is handled crust leather flesh noodles using 320 mesh sand paper；Flour milling, using 600 mesh sand paper to base
Grain defect or disability position are handled；The control of crust leather moisture content is in 15-20% when buffing；
(4), dedusting is washed one's face；
(5), wound: mending agente roller coating is mended, mending agente coated weight is 12g/sf；Wherein, mending agente production method are as follows: first 40
The water of part is mixed with 30 parts of casein RODA bind TU 688/B (De Ruipiization Co., Ltd), is sufficiently stirred, and stirring condition turns
Fast 950r/min, time 20min；Next is sequentially added into 30 parts of pigment paste PPE DEEP BLACK A-ID, and (this tal fibre finely applies
Expect (Suzhou) Co., Ltd), 60 parts of repairing paste STUCCO 8185 (Mai Ji Chemical Co., Ltd.), 20 parts of oily wax assistant KO 2311
(Xiamen Hao Deya trade Co., Ltd), 20 parts of oil wax assistant NI 1303 (Xiamen Hao Deya trade Co., Ltd), sufficiently stir
It mixes, stirring condition revolving speed 950r/min, time 20min；Then 160 parts of water are added, and sequentially add 40 parts of aromatic urethanes
Resin dispersion liquid 1360 (Ning Baidi Specialty Chemical (Shanghai) Co., Ltd.), 20 parts of polyurethane foam resin FP-34G (big Japan
Ink chemistry), it is sufficiently stirred, stirring condition revolving speed 950r/min, time 20min；It is eventually adding 3 parts of crosslinking agent Aqualen
AKU liq (the fine coating of this tal fibre (Suzhou) Co., Ltd), is sufficiently stirred, stirring condition revolving speed 950r/min, the time
20min finally stands 4h；
(6), it stands, time of repose 8h；
(7), it polishes；
(8), press polish: rolling condition is 130 DEG C/50kgf/5 second, and the moisture content control of crust leather is in 15-20% when press polish；
(9), ironing: ironing conditions are 135 DEG C/30kgf, and the moisture content of crust leather is controlled in 15-20% when ironing
(10), concussion is drawn soft: it is 5 grades that soft intensity is drawn in concussion；
(11), fall soft: falling the soft time is 10h；
(12), toggling: toggling condition is 45 DEG C/6cm/25min.
By the leather repairing method, gained leather coating is thin soft, retains the natural graining of leather, and product kishke feel is strong；
Coating it is resistance to it is dry fall, be not easy to be recessed, fall off；Coating has very strong filling a vacancy property and covering power, and product yield of leather is high, utilization rate height,
Class is high；Coating has good adhesiveness and interior adhesiveness, does not fall slurry, will not generate to subsequent middle layer, top finishing negative
It influences；And oily wax assistant dosage reduces 8~10% in method implementation process, reduces the production cycle and improves production efficiency.
Comparative example 1
The benefit used of comparative example 1 hurts method and embodiment 1 is almost the same, and difference is: it is to use that comparative example 1, which hurts process in benefit,
The brushing of existing mending agente, mending agente coated weight are 12g/sf；The specific component of existing mending agente are as follows: 40 parts first of water with
100 parts of repairing paste STUCCO 8185 (Mai Ji Chemical Co., Ltd.) mixing, are sufficiently stirred, stirring condition revolving speed 950r/min, when
Between 20min；Secondly 20 parts of oil wax assistant KO 2311 (Xiamen Hao Deya trade Co., Ltd), 20 parts of oily wax assistant NI are added
1303 (Xiamen Hao Deya trade Co., Ltds), are sufficiently stirred, stirring condition revolving speed 950r/min, time 20min；Then it adds
160 parts of water, and 40 parts of aromatic polyurethane resins dispersion liquids 1360 (Ning Baidi Specialty Chemical (Shanghai) Co., Ltd.) are added, it fills
Divide stirring, stirring condition revolving speed 950r/min, time 20min；It is eventually adding 30 parts of pigment paste PPE DEEP BLACK A-ID
(the fine coating of this tal fibre (Suzhou) Co., Ltd), is sufficiently stirred, stirring condition revolving speed 950r/min, time 20min, last quiet
Set 4h.
Comparative example 2
The benefit used of comparative example 2 hurts method and embodiment 1 is almost the same, and difference is: comparative example 2 is hurt in benefit mends wound in process
Agent does not contain Foamex；
Comparative example 3
The benefit used of comparative example 3 hurts method and embodiment 1 is almost the same, and difference is: comparative example 3 is hurt used in process in benefit
Mending agente preparation method is different, and mending agente is disposably mixed to prepare by its each component in comparative example 3, mending agente in comparative example 3
Preparation method specifically: directly by 200 parts of water and 30 parts of casein RODA bind TU 688/B (De Ruipiization Co., Ltd), 30
Part pigment paste PPE DEEP BLACK A-ID (the fine coating of this tal fibre (Suzhou) Co., Ltd), 60 parts of repairing paste STUCCO
8185 (Mai Ji Chemical Co., Ltd.s), 20 parts of oil wax assistant KO 2311 (Xiamen Hao Deya trade Co., Ltd), 20 parts of oily waxes help
Agent NI 1303 (Xiamen Hao Deya trade Co., Ltd), 40 parts of (Ning Baidi special types of aromatic polyurethane resins dispersion liquid 1360
Learn (Shanghai) Co., Ltd.), 20 parts of polyurethane foam resin FP-34G (big Japanese ink chemistry), 3 parts of crosslinking agent Aqualen
AKU liq (the fine coating of this tal fibre (Suzhou) Co., Ltd) mixing, is sufficiently stirred, stirring condition revolving speed 950r/min, the time
20min finally stands 4h.
The leather for hurting method processing by the benefit of the embodiment of the present invention 1 and comparative example 1-3 is subjected to mending agente dispersibility, is applied
The benefits such as layer adhesion strength, covering, fillibility, resistance to falling property of drum, glossiness hurt Contrast on effect, and comparing result is as shown in table 1 below:
The benefit of table 1 hurts Contrast on effect table
The foregoing descriptions are merely the embodiment using this origination techniques content, any those skilled in the art use this wound
Make done modifications and changes, all belong to the scope of the patents of this creation opinion, and is not limited to those disclosed embodiments.
Claims (6)
1. a kind of leather repairing method, which is characterized in that successively comprise the following steps: soft → dry vacuum → buffing is drawn in crust leather concussion
→ dedusting is washed one's face → mends wound → standing → polishing → press polish → ironing → concussion is drawn soft → and falls soft → toggling, wherein mends wound
The parts by weight of component of mending agente used be water 180-250 parts, 25-40 parts of casein, 20-35 parts of pigment paste, 55-80 parts of repairing paste,
Oily wax assistant 20-45 parts, 35-50 parts of polyurethane resin, 15-30 parts of Foamex, 2-5 parts of crosslinking agent.
2. leather repairing method according to claim 1, it is characterised in that: the repairing paste is polyurethane resin, mineral
The composite material of oil and synthetic wax.
3. leather repairing method according to claim 1, it is characterised in that: the polyurethane resin is aromatic urethane
Resin emulsion, dispersion liquid or aqueous solution.
4. leather repairing method according to claim 1, it is characterised in that: the Foamex is polyurethane foam tree
Rouge.
5. leather repairing method according to claim 1, which is characterized in that the preparation method of the mending agente are as follows: first
Water and casein are mixed, the dosage of water is the 20-35% of the parts by weight total amount of water at this time, and stirring condition is revolving speed 900-
1200r/min, time 15-20min；Next is sequentially added into pigment paste, repairing paste, oily wax assistant, is stirred, stirring condition
For revolving speed 900-1200r/min, time 15-20min；Then remaining water is added, and sequentially adds polyurethane resin, foaming tree
Rouge is stirred, and stirring condition is revolving speed 900-1200r/min, time 15-20min；It is eventually adding crosslinking agent, is stirred,
Stirring condition is revolving speed 900-1200r/min, and time 15-20min finally stands 2-5h.
6. leather repairing method according to claim 1, which is characterized in that successively comprise the following steps:
(1) crust leather concussion is drawn soft: it is 5-6 grades that soft intensity is drawn in concussion；
(2) dry vacuum: dry vacuum condition is 40-45 DEG C/90-120 seconds/vacuum degree-(0.05-0.1) Mpa；
(3) buffing: being handled crust leather flesh noodles using 320 mesh sand paper, using 600 mesh sand paper to crust leather grain defect or disability
Position is handled；The control of crust leather moisture content is in 15-20% when buffing；
(4) dedusting is washed one's face；
(5) wound: mending agente roller coating is mended, mending agente coated weight is 10-15g/sf；
(6) it stands: time of repose 6-9h；
(7) it polishes；
(8) press polish: rolling condition is 125-140 DEG C/35-50kgf/4-7 second, and the moisture content control of crust leather is in 15- when press polish
20%；
(9) ironing: ironing conditions are 125-140 DEG C/20-35kgf, and the moisture content of crust leather is controlled in 15-20% when ironing；
(10) concussion is drawn soft: it is 5-6 grades that soft intensity is drawn in concussion；
(11) fall soft: falling the soft time is 10-15h；
(12) toggling: toggling condition is 40-55 DEG C/4-7cm/25-30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199965.2A CN109576420A (en) | 2018-10-16 | 2018-10-16 | A kind of leather repairing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199965.2A CN109576420A (en) | 2018-10-16 | 2018-10-16 | A kind of leather repairing method |
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| CN109576420A true CN109576420A (en) | 2019-04-05 |
Family
ID=65920105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811199965.2A Pending CN109576420A (en) | 2018-10-16 | 2018-10-16 | A kind of leather repairing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111072996A (en) * | 2019-12-09 | 2020-04-28 | 兴业皮革科技股份有限公司 | Polyurethane micro-powder emulsification method, polyurethane micro-powder emulsion, leather mending agent and application thereof |
| CN112776527A (en) * | 2021-01-22 | 2021-05-11 | 石家庄星博皮革制品有限公司 | Production process of cowhide decorative picture |
| CN113350578A (en) * | 2021-04-14 | 2021-09-07 | 山东德信皮业有限公司 | Method for repairing damage of dermis based on electrostatic spinning technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113350578A (en) * | 2021-04-14 | 2021-09-07 | 山东德信皮业有限公司 | Method for repairing damage of dermis based on electrostatic spinning technology |
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Application publication date: 20190405 |