CN104774978A - Method for producing white wet leather through combined tanning - Google Patents

Method for producing white wet leather through combined tanning Download PDF

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Publication number
CN104774978A
CN104774978A CN201510134188.3A CN201510134188A CN104774978A CN 104774978 A CN104774978 A CN 104774978A CN 201510134188 A CN201510134188 A CN 201510134188A CN 104774978 A CN104774978 A CN 104774978A
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CN
China
Prior art keywords
tanning
liming
tanning agent
weight amount
tare weight
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Pending
Application number
CN201510134188.3A
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Chinese (zh)
Inventor
强西怀
陈苗苗
张辉
陈渭
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Shaanxi University of Science and Technology
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Shaanxi University of Science and Technology
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Priority to CN201510134188.3A priority Critical patent/CN104774978A/en
Publication of CN104774978A publication Critical patent/CN104774978A/en
Pending legal-status Critical Current

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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
    • C14C1/00—Chemical treatment prior to tanning
    • C14C1/08—Deliming; Bating; Pickling; Degreasing
    • 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
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • 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
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • C14C3/28—Multi-step processes

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

A method for producing white wet leather through combined tanning comprises the following steps: carrying deliming softening on limed skin, washing by using softened water, tanning through using a Cranofin<R> Easy F-90 tanning agent, carrying out salt-free pickling, and tanning through using a TANFORTMT series tanning agent. The method for producing white wet leather through Cranofin<R> Easy F-90 tanning agent and TANFORTMT series tanning agent combined tanning allows the white wet leather with high damp heat resistance stability to be obtained, realizes salt-free pickling tanning of the white wet leather, and is a clean technology for producing the white wet leather.

Description

A kind of method of producing white wet leather in conjunction with tanning
Technical field
The present invention relates to leather cleaning production technical field, be specifically related to a kind of method of producing white wet leather in conjunction with tanning.
Background technology
Chromic tanning not only saves time, economical, and chrome tanned leather has that hydrothermal stability is high, physical strength is large, dyeing behavior is good, the soft excellent over-all properties such as plentiful.But current chromic tanning is faced with baptism, be Cr materials resource shortage itself on the one hand; That in resultant Leather, trivalent chromium can be oxidized to sexavalent chrome because of the impact of external condition on the other hand, and Cr 6+carcinogenic substance is regarded as by the World Health Organization; In addition, in traditional pickling chrome tanning process, the neutral salt of about 8% need be added to suppress the swelling of sour skin, and the accumulation of a large amount of neutral salt can make salting of soil, causes disadvantageous effect to the eubiosis.Therefore, exploitation Chrome-free, few chrome tanning agent and tannage and salt-free pickling, tanning technique are the theme places realizing cleaner leather-making production.
In recent years, the exploitation of chrome-free tanning agent and tannage achieved certain achievement, produced white wet leather technology as dolantin company takes the lead in being proposed TWT chrome-free tanning agent at home; LANXESS company studies and is proposed novel organic tanning agent and the tannage thereof of a kind of X-Tan by name; The white that Clariant company releases system (Easy White Tan) of easily tanning carries out producing white wet leather without chrome tanning; Kemira company developed completely not containing the general leather tanning system of chromium, acetaldehyde and aldehyde precursor, and is proposed corresponding serial tanning agent and tanning system.Although above different materials can realize the production of white wet leather separately under independently tanning system, also there is certain defect or drawback, such as: its tanned white wet leather shrinkage temperature is not high, tanning time need routine to have salt pickling etc.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of this invention is to provide a kind of method of producing white wet leather in conjunction with tanning, will easy F-90 tanning agent and TANFOR tMt series tanning agent carries out producing white wet leather in conjunction with tanning, and it not only can obtain the higher white wet leather of hydrothermal stability, can also realize salt-free pickling, tanning wet leather in vain, be a kind of produce white wet leather clean technique.
In order to achieve the above object, the technical scheme that the present invention takes is:
Produce a method for white wet leather in conjunction with tanning, comprise the following steps:
1) deashing and softening is carried out to liming skin, softening washing;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water of liming tare weight amount 100% and 4-6% easy F-90 tanning agent, rotates 2h-4h by 30 DEG C-38 DEG C; Be warming up to 35-44 DEG C, rotate 3h-6h;
3) salt-free pickling: by step 2) owse is cooled to 20 DEG C-25 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, regulates body lotion pH to be 2.5-3.0, be rotated further 1h-2h in 1h;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 3-6%, 20 DEG C-25 DEG C, rotate 2h-3h; Then add the T-B tanning agent of liming tare weight amount 2-4%, rotate 2h-4h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 1h-2h, pH is 4.0-4.4, stops drum and spends the night, go out drum after rotating 30min next day.
Described liming skin is sheepskin, ox-hide or pigskin.
Described acidic substance are formic acid or sulfuric acid.
Tool of the present invention has the following advantages:
1, by the white wet leather of this method tanning, dyeing behavior is splendid, the careful consolidation of grain, and fullness ratio is better, and tearing toughness is excellent.
2, adopt this two classes tanning agent to have compared with the shrinkage temperature of the white wet leather of the two independent tanning in conjunction with the shrinkage temperature of the white wet leather of tanning significantly to improve.
3, achieve salt-free pickling, to alleviate in leather-making waste water chlorion to the pollution of environment.
Embodiment
Below by embodiment, the present invention is specifically described, is only used to further illustrate the present invention, can not limiting the scope of the invention be interpreted as.
Embodiment one
Produce a method for white wet leather in conjunction with tanning, comprise the following steps:
1) carry out deashing and softening to liming skin, washing, described liming skin is ox-hide;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water and 6% of liming tare weight amount 100% easy F-90 tanning agent, rotates 4h by 38 DEG C; Be warming up to 44 DEG C, rotate 6h;
3) salt-free pickling: by step 2) owse is cooled to 25 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, and in 1h, regulate body lotion pH to be 3.0, be rotated further 1h, described acidic substance are formic acid;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 3%, 25 DEG C, rotate 2h; Then add the T-B tanning agent of liming tare weight amount 4%, rotate 4h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 2h, pH is 4.4, stops drum and spends the night, go out drum after rotating 30min next day.
The tanning shrinkage temperature of the present embodiment is 94 DEG C.
Embodiment two
Produce a method for white wet leather in conjunction with tanning, comprise the following steps:
1) carry out deashing and softening to liming skin, softening washing, described liming skin is sheepskin;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water and 4% of liming tare weight amount 100% easy F-90 tanning agent, rotates 2h by 30 DEG C; Be warming up to 35 DEG C, rotate 3h;
3) salt-free pickling: by step 2) owse is cooled to 20 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, and in 1h, regulate body lotion pH to be 2.5, be rotated further 2h, described acidic substance are sulfuric acid;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 6%, 20 DEG C, rotate 3h; Then add the T-B tanning agent of liming tare weight amount 2%, rotate 2h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 1h, looking into pH is 4.0, stops drum and spends the night, go out drum after rotating 30min next day.
The tanning shrinkage temperature of the present embodiment is 91 DEG C.
Embodiment three
Produce a method for white wet leather in conjunction with tanning, comprise the following steps:
1) carry out deashing and softening to liming skin, softening washing, described liming skin is sheepskin;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water and 5% of liming tare weight amount 100% easy F-90 tanning agent, rotates 3h by 35 DEG C; Be warming up to 40 DEG C, rotate 5h;
3) salt-free pickling: by step 2) owse is cooled to 22 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, and in 1h, regulate body lotion pH to be 2.8, be rotated further 1.5h, described acidic substance are sulfuric acid;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 4.5%, 22 DEG C, rotate 2.5h; Then add the T-B tanning agent of liming tare weight amount 3%, rotate 3h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 1.5h, pH is 4.2, stops drum and spends the night, go out drum after rotating 30min next day.
The tanning shrinkage temperature of the present embodiment is 93 DEG C.
Embodiment four
Produce a method for white wet leather in conjunction with tanning, comprise the following steps:
1) carry out deashing and softening to liming skin, softening washing, described liming skin is pigskin;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water and 4.5% of liming tare weight amount 100% easy F-90 tanning agent, rotates 2.5h by 35 DEG C; Be warming up to 35 DEG C, rotate 4h;
3) salt-free pickling: by step 2) owse is cooled to 23 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, and in 1h, regulate body lotion pH to be 2.6, be rotated further 2h, described acidic substance are sulfuric acid;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 5%, 23 DEG C, rotate 2.5h; Then add the T-B tanning agent of liming tare weight amount 2.5%, rotate 2.5h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 1.5h, looking into pH is 4.1, stops drum and spends the night, go out drum after rotating 30min next day.
It is 92 DEG C that the present embodiment records tanning shrinkage temperature.

Claims (7)

1. produce a method for white wet leather in conjunction with tanning, it is characterized in that, comprise the following steps:
1) deashing and softening is carried out to liming skin, softening washing;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water of liming tare weight amount 100% and 4-6% easy F-90 tanning agent, rotates 2h-4h by 30 DEG C-38 DEG C; Be warming up to 35-44 DEG C, rotate 3h-6h;
3) salt-free pickling: by step 2) owse is cooled to 20 DEG C-25 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, regulates body lotion pH to be 2.5-3.0, be rotated further 1h-2h in 1h;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 3-6%, 20 DEG C-25 DEG C, rotate 2h-3h; Then add the T-B tanning agent of liming tare weight amount 2-4%, rotate 2h-4h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 1h-2h, looking into pH is 4.0-4.4, stops drum and spends the night, go out drum after rotating 30min next day.
2. a kind of method of producing white wet leather in conjunction with tanning according to claim 1, is characterized in that: described liming skin is sheepskin, ox-hide or pigskin.
3. a kind of method of producing white wet leather in conjunction with tanning according to claim 1, is characterized in that: described acidic substance are formic acid or sulfuric acid.
4. a kind of method of producing white wet leather in conjunction with tanning according to claim 1, is characterized in that, comprise the following steps:
1) carry out deashing and softening to liming skin, washing, described liming skin is ox-hide;
2) the tanning of Easy F-90 tanning agent: the ox-hide after washing is dropped into rotary drum, adds the water and 6% of liming tare weight amount 100% easy F-90 tanning agent, rotates 4h by 38 DEG C; Be warming up to 44 DEG C, rotate 6h;
3) salt-free pickling: by step 2) owse is cooled to 25 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, and in 1h, regulate body lotion pH to be 3.0, be rotated further 1h, described acidic substance are formic acid;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 3%, 25 DEG C, rotate 2h; Then add the T-B tanning agent of liming tare weight amount 4%, rotate 4h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 2h, looking into pH is 4.4, stops drum and spends the night, go out drum after rotating 30min next day.
5. a kind of method of producing white wet leather in conjunction with tanning according to claim 1, is characterized in that, comprise the following steps:
1) carry out deashing and softening to liming skin, softening washing, described liming skin is sheepskin;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water and 4% of liming tare weight amount 100% easy F-90 tanning agent, rotates 2h by 30 DEG C; Be warming up to 35 DEG C, rotate 3h;
3) salt-free pickling: by step 2) owse is cooled to 20 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, and in 1h, regulate body lotion pH to be 2.5, be rotated further 2h, described acidic substance are sulfuric acid;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 6%, 20 DEG C, rotate 3h; Then add the T-B tanning agent of liming tare weight amount 2%, rotate 2h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 1h, looking into pH is 4.0, stops drum and spends the night, go out drum after rotating 30min next day.
6. a kind of method of producing white wet leather in conjunction with tanning according to claim 1, is characterized in that, comprise the following steps:
1) carry out deashing and softening to liming skin, softening washing, described liming skin is sheepskin;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water and 5% of liming tare weight amount 100% easy F-90 tanning agent, rotates 3h by 35 DEG C; Be warming up to 40 DEG C, rotate 5h;
3) salt-free pickling: by step 2) owse is cooled to 22 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, and in 1h, regulate body lotion pH to be 2.8, be rotated further 1.5h, described acidic substance are sulfuric acid;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 4.5%, 22 DEG C, rotate 2.5h; Then add the T-B tanning agent of liming tare weight amount 3%, rotate 3h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 1.5h, looking into pH is 4.2, stops drum and spends the night, go out drum after rotating 30min next day.
7. a kind of method of producing white wet leather in conjunction with tanning according to claim 1, is characterized in that, comprise the following steps:
1) carry out deashing and softening to liming skin, softening washing, described liming skin is pigskin;
2) the tanning of Easy F-90 tanning agent: the liming skin after washing is dropped into rotary drum, adds the water and 4.5% of liming tare weight amount 100% easy F-90 tanning agent, rotates 2.5h by 35 DEG C; Be warming up to 35 DEG C, rotate 4h;
3) salt-free pickling: by step 2) owse is cooled to 23 DEG C, and gradation adds the acidic substance after with 10 times of water dilutions, and in 1h, regulate body lotion pH to be 2.6, be rotated further 2h, described acidic substance are sulfuric acid;
4) TANFOR tMthe tanning of T series tanning agent: in step 3) pickling liquid in add the T-A tanning agent of liming tare weight amount 5%, 23 DEG C, rotate 2.5h; Then add the T-B tanning agent of liming tare weight amount 2.5%, rotate 2.5h; Add the water of liming tare weight amount 150%, be warming up to 40 DEG C, then turn 1.5h, looking into pH is 4.1, stops drum and spends the night, go out drum after rotating 30min next day.
CN201510134188.3A 2015-03-25 2015-03-25 Method for producing white wet leather through combined tanning Pending CN104774978A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108866257A (en) * 2018-06-28 2018-11-23 四川大学 A kind of nano-micelle tanning agent and preparation method thereof and the application in tanning
CN112590324A (en) * 2020-10-21 2021-04-02 泉州美联合塑胶工艺有限公司 High-gloss leather and manufacturing method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108866257A (en) * 2018-06-28 2018-11-23 四川大学 A kind of nano-micelle tanning agent and preparation method thereof and the application in tanning
CN112590324A (en) * 2020-10-21 2021-04-02 泉州美联合塑胶工艺有限公司 High-gloss leather and manufacturing method thereof

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