CN108456754A - A method of enhancing double-layer leather intensity using filling means - Google Patents
A method of enhancing double-layer leather intensity using filling means Download PDFInfo
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- CN108456754A CN108456754A CN201810332274.9A CN201810332274A CN108456754A CN 108456754 A CN108456754 A CN 108456754A CN 201810332274 A CN201810332274 A CN 201810332274A CN 108456754 A CN108456754 A CN 108456754A
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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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/58—Drying
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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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/10—Vegetable 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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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a kind of method enhancing double-layer leather intensity using filling means, double-layer leather by filling pre-treatment, filling, filling postprocessing working procedures, obtains two layers of enhancing skin base successively；Wherein, the specific method of filling is：The polyvinyl alcohol of the water of double-layer leather, tare weight 40%~600% by filling pre-treatment and tare weight 5%~50% is added in rotary drum, it is 50~80 DEG C to adjust temperature, rotates 1~8h；The degree of polymerization of polyvinyl alcohol used is 100~2000, and alcoholysis degree is 50%~99%.Double-layer leather Enhancement Method using the present invention can be obviously improved the tearing strength, tensile strength and bursting strength of double-layer leather, can effectively solve the problem that leather filling complexity and the unconspicuous technical problem of strength enhancing.
Description
Technical field
The invention belongs to leather processing technology fields, and in particular to a kind of to enhance double-layer leather intensity using filling means
Method.
Background technology
Leather industry is the pillar industry in light industry of China, it is to process suitable people's life using Animal Skin as raw material
Living, production leather products.Animal Skin can remove or destroy the component useless to process hides (such as in the process of process hides
Epidermis, adipose gland, fat, subcutaneous tissue, elastomer, reticular fibre etc.), substantially leave behind the component (glue useful to process hides
Fibrinogen), i.e., the corium that we are commonly called as.Different according to collagenous fibres thickness, braiding situation, corium can be divided into papillaris pars (again
Claim grain layer) and lamina reticularis.During practical process hides processes, Animal Skin generally passes through split work after liming or tanning
Sequence can divide 1~3 layer.Animal Skin with grain layer is known as first layer lether by the usage of trade, is worth highest, and product uses extensively, can
For various uses；And the Animal Skin of only lamina reticularis is called double-layer fur or three layers of skin, value is relatively low, and general is only head layer
The 50% of skin value is hereinafter, product use scope is extensive not as good as first layer lether.According to the usage of trade, double-layer fur and three layers of skin are all referred to as
For double-layer leather.
In actual production and consumption, double-layer leather has an all characteristics and price advantage of corium, production and
Consumption demand is even greater than first layer lether.However, due to the weakening effect of self structure characteristic and process, double-layer leather exists
Intensity deficiency problem, seriously affected the extension of double-layer leather application range and the promotion of added value.So leather industry is ground
Hair personnel and the producer are always it is desirable to keep that even improve the intensity of double-layer leather.Specifically there is following three classes method：
The first kind is set about from production technology, accomplishes to keep its intensity in technological design and processing.Such mode is general only
The original intensity that can keep second layer leather, does not reduce in process as far as possible, it can not improve the intensity of second layer leather.
Second class, sets about from chemical materials, uses the special material that intensity can be improved.These materials to a certain extent may be used
It to improve the intensity of second layer leather, but is influenced by process and other materials, practical enhancing effect is relatively low.The prior art discloses
It is a kind of and to be inserted in collagen by synthesizing special high-molecular copolymer, successfully by leather tensile strength from original
15MPa is improved to 22MPa.But high polymer synthesis is difficult, and expensive, product stability is poor, is carried to tear strength of leather
Height has not been reported.
Third class, starts with from structure change, increases an artificial grain layer to second layer leather.Although such method improves two layers
The intensity of leather, but the sanitation performance of double-layer leather is greatly reduced, reduce product quality and comfort.In addition, should
Method is carried out in the dry finishing workshop section of double-layer leather, can not be solved in beam house and wet finishing workshop section because of strength reduction
And the phenomenon that losing utility value, there is certain limitation.
Therefore, fail to find a kind of simple, suitable mode in actual production at present and realize double-layer leather mechanical property
It improves, and does not influence the quality of double-layer leather simultaneously or reduce its unique sanitation performance.
Invention content
In order to overcome shortcoming and defect of the existing technology, present invention offer is a kind of to enhance double-layer fur using filling means
The method for removing from office intensity, by being simply filled with, you can reaching the intensity of double-layer leather, (such as tearing strength and is burst apart at tensile strength
Intensity) purpose that significantly improves.
In order to achieve the above object, the technical solution adopted in the present invention is：There is provided it is a kind of using filling means enhance two
The method of layer strength of leather, double-layer leather by filling pre-treatment, filling, filling postprocessing working procedures, obtain two layers of enhancing successively
Skin base；Double-layer leather is two layers of tanning or two layers of crust leather；
Wherein, the specific method of filling is：It will be put into rotary drum by the double-layer leather of filling pre-treatment, and tare weight be added
40%~600% water, it is 50~80 DEG C to adjust temperature, adds the polyvinyl alcohol of tare weight 5%~50%, rotates 1~8h；Or
The polyvinyl alcohol of tare weight 5%~50% is dissolved in the water of tare weight 40%~600%, it is 50~80 DEG C to adjust temperature, is added
It is placed in the rotary drum for the double-layer leather for being filled through pre-treatment, rotates 1~8h；The degree of polymerization of the polyvinyl alcohol be 100~
2000, alcoholysis degree is 50%~99%.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the specific method of filling is：It will be put into rotary drum by the double-layer leather of filling pre-treatment, and skin be added
Weigh 100%~400% water, it is 60~75 DEG C to adjust temperature, adds the polyvinyl alcohol of tare weight 5%~20%, rotation 2~
4h；Or be dissolved in the polyvinyl alcohol of tare weight 5%~20% in the water of tare weight 100%~400%, it is 60~75 to adjust temperature
DEG C, addition is placed in the rotary drum for the double-layer leather for being filled through pre-treatment, rotates 2~4h.
Further, the degree of polymerization of polyvinyl alcohol is 300~1000, and alcoholysis degree is 75%~90%.
Further, two layers of tanning are through in chrome tanning agent, zirconium tanning agent, aldehyde tanning agent, vegetable tanning agent, aluminium tanningagent, iron tannage agent, titanium tannage agent
One or more of tannings processing after obtained leather；Two layers of crust leather be two layers of tanning through rewetting, neutralization, retanning, dyeing plus
The leather obtained after fat, drying, arranging process processing.
Further, double-layer leather be two layers of tanning when, filling pre-treatment include water squeezing, shaving, weigh, rewetting, washing with
And neutralize, after neutralization, the pH of double-layer leather is 4.0~9.0, and filling post-processing includes dyeing, stuffing, washing, drying；Described two
When layer leather is two layers of crust leather, filling pre-treatment include weigh, rewetting, washing and neutralization, after neutralization, the pH of double-layer leather is
4.0~9.0, filling post-processing includes washing, drying.
Further, the drying means in filling post-processing be take horse dry, natural loft dried, air blast extension dry it is dry, collapse
At least one of plate drying, paste drying and vacuum drying.
The beneficial effects of the invention are as follows：
1. the present invention uses polyvinyl alcohol as filler, after filler enters leather inside, the hydroxyl in polyvinyl alcohol
Hydrogen bond action is formed with hide glue original molecule, polyvinyl alcohol molecule forms physical entanglement with collagenous fibres, can not only improve final
The filling uniformity of leather products, and the performances such as the tensile strength of double-layer leather, tearing strength, bursting strength significantly carry
Height, double-layer leather are enhanced.
2. the degree of polymerization of polyvinyl alcohol is 100~2000, alcoholysis degree is 50%~99%, is filled in 50~80 DEG C, pH=
It is carried out under conditions of 4.0~9.0, filler can be substantially dissolved in solution, and be easily accessible inside leather, filling effect
It is good.
3. fill process using the present invention and filler, leather quality will not become negatively affected after filling；Moreover,
The synthesis of used filler is simple in the present invention, and product stability is good, and fill process is easy, enhances compared to existing second layer leather
Used filler, can be greatly lowered cost, economic benefit is effectively ensured in technology.
Specific implementation mode
The present invention is specifically described below by embodiment, is served only for that invention is further explained, no
It can be interpreted as limiting the scope of the present invention, the technician in the field can be according to the content of foregoing invention to the present invention
Make some nonessential modifications and adaptations.
Embodiment one
Two layers of tanning filling enhancing technique are as follows：
Two layers of chrome leather → water squeezing → shaving → weigh → rewetting → washing → neutralization → filling → dyeing, stuffing → washing
→ drying → arrangement → bis- layer enhance skin base.The specific steps are：
(1) double-layer leather is chosen：Select two layers of tanning Jing Guo chrome tanning agent tanning；
(2) pre-treatment is filled：Two layers of tanning of selection are passed through successively water squeezing, shaving, weigh, rewetting, washing, at neutralization
Reason, the pH of double-layer leather is 4.5 after neutralization；
(3) it fills：It will be put into rotary drum by the double-layer leather of filling pre-treatment, and the water of tare weight 400% be added, adjusted
Temperature is 80 DEG C, adds 30% polyvinyl alcohol of tare weight (degree of polymerization 1700, alcoholysis degree 70%), rotates 8h；
(4) filling post-processing：Pass through dyeing successively to the double-layer leather after filling, stuffing, washes, take horse drying, arrange
Afterwards, two layers of enhancing skin base are obtained.
Embodiment two
Two layers of tanning filling enhancing technique are as follows：
Two layers of aldehyde tanned leather → water squeezing → shaving → weigh → rewetting → washing → neutralization → filling → dyeing, stuffing → washing
→ drying → arrangement → bis- layer enhance skin base.The specific steps are：
(1) double-layer leather is chosen：Select two layers of tanning Jing Guo aldehyde tanning agent tanning；
(2) pre-treatment is filled：Two layers of tanning of selection are passed through successively water squeezing, shaving, weigh, rewetting, washing, at neutralization
Reason, the pH of double-layer leather is 9.0 after neutralization；
(3) it fills：The polyvinyl alcohol (degree of polymerization 300, alcoholysis degree 90%) of tare weight 5% is dissolved in tare weight 100%
Water in, adjust temperature be 75 DEG C, addition be placed in the rotary drum for the double-layer leather for being filled through pre-treatment, rotate 4h；
(4) filling post-processing：To the double-layer leather after filling successively by dyeing, stuffing, washing, nature loft dried,
After arrangement, two layers of enhancing skin base are obtained.
Embodiment three
Two layers of tanning filling enhancing technique are as follows：
Two layers of zirconium tanned leather → water squeezing → shaving → weigh → rewetting → washing → neutralization → filling → dyeing, stuffing → washing
→ drying → arrangement → bis- layer enhance skin base.The specific steps are：
(1) double-layer leather is chosen：Select two layers of tanning Jing Guo zirconium tanning agent tanning；
(2) pre-treatment is filled：Two layers of tanning of selection are passed through successively water squeezing, shaving, weigh, rewetting, washing, at neutralization
Reason, the pH of double-layer leather is 6.0 after neutralization；
(3) it fills：It will be put into rotary drum by the double-layer leather of filling pre-treatment, and the water of tare weight 400% be added, adjusted
Temperature is 60 DEG C, adds 20% polyvinyl alcohol of tare weight (degree of polymerization 1000, alcoholysis degree 75%), rotates 2h；
(4) filling post-processing：Pass through dyeing successively to the double-layer leather after filling, stuffing, washes, collapse plate drying, arrange
Afterwards, two layers of enhancing skin base are obtained.
Example IV
Two layers of crust leather filling enhancing technique are as follows：
Two layers of crust leather → weigh → rewetting → washing → neutralization → filling → washing → drying → arrangement → bis- layer enhance skin
Base.The specific steps are：
(1) two layers of crust leather are chosen：Two layers of chrome leather of selection by traditional rewettings, neutralization, filling, dyeing, stuffing, drying,
Arranging process treated two layers of chrome tanning crust leather；
(2) pre-treatment is filled：To two layers of chrome tanning crust leather of selection successively by weighing, rewetting, washing and neutralisation treatment,
The pH of double-layer leather is 4.0 after neutralization；
(3) it fills：It will be put into rotary drum by the double-layer leather of filling pre-treatment, and the water of tare weight 600% be added, adjusted
Temperature is 75 DEG C, adds 40% polyvinyl alcohol of tare weight (degree of polymerization 2000, alcoholysis degree 50%), rotates 6h；
(4) filling post-processing：To the double-layer leather after filling successively after washing, vacuum drying, arrangement, two layers of increasing are obtained
Strong skin base.
Embodiment five
Two layers of crust leather filling enhancing technique are as follows：
Two layers of crust leather → weigh → rewetting → washing → neutralization → filling → washing → drying → arrangement → bis- layer enhance skin
Base.The specific steps are：
(1) two layers of crust leather are chosen：Two layers of aldehyde tanned leather of selection by traditional rewettings, neutralization, filling, dyeing, stuffing, drying,
Processes treated two layers of aldehyde tannage crust leather such as arrange；
(2) pre-treatment is filled：To two layers of aldehyde tannage crust leather of selection successively by weighing, rewetting, washing and neutralisation treatment,
The pH of double-layer leather is 8.0 after neutralization；
(3) it fills：The polyvinyl alcohol (degree of polymerization 1500, alcoholysis degree 80%) of tare weight 5% is dissolved in tare weight 50%
Water in, adjust temperature be 50 DEG C, addition be placed in the rotary drum for the double-layer leather for being filled through pre-treatment, rotate 5h；
(4) filling post-processing：To the double-layer leather after filling successively by washing, air blast extension dry it is dry, arrange after, obtain two
Layer enhancing skin base.
Embodiment six
Two layers of crust leather filling enhancing technique are as follows：
Two layers of crust leather → weigh → rewetting → washing → neutralization → filling → washing → drying → arrangement → bis- layer enhance skin
Base.The specific steps are：
(1) two layers of crust leather are chosen：Two layers of zirconium tanned leather of selection by traditional rewettings, neutralization, filling, dyeing, stuffing, drying,
Processes treated two layers of zirconium tanning crust leather such as arrange；
(2) pre-treatment is filled：To two layers of zirconium tanning crust leather of selection successively by weighing, rewetting, washing and neutralisation treatment,
The pH of double-layer leather is 5.5 after neutralization；
(3) it fills：It will be put into rotary drum by the double-layer leather of filling pre-treatment, and the water of tare weight 100% be added, adjusted
Temperature is 65 DEG C, adds 10% polyvinyl alcohol of tare weight (degree of polymerization 1200, alcoholysis degree 70%), rotates 3h；
(4) filling post-processing：To the double-layer leather after filling successively by washing, vacuum drying, natural loft dried, whole
After reason, two layers of enhancing skin base are obtained.
Comparative example
It is as follows that two layers of tanning prepare double-layer fur base treatment process：
Two layers of zirconium tanned leather → water squeezing → shaving → weigh, and → rewetting → washing → neutralization → dyeing → stuffing → washing → is dry
Dry → arrangement → double-layer fur base.The specific steps are：
(1) double-layer leather is chosen：Select two layers of tanning Jing Guo zirconium tanning agent tanning；
(2) treatment process：Two layers of tanning of selection are passed through successively water squeezing, shaving, weigh, rewetting, washing, at neutralization
Reason, the pH of double-layer leather is 6.0 after neutralization；The double-layer leather after neutralization is dyed again, stuffing, washing, suspension is dry naturally
The processing such as dry, arrangement, obtain double-layer fur base.
Interpretation of result
After the completion of prepared by two layers of enhancing skin base (resultant Leather), first observing leather, whether soft and surface cracks, then
According to QB/T 2709-2005《The measurement of leather physics and mechanical test thickness》Leather thicknesses are measured, and are calculated according to formula I
Leather thickens rate；According to national standard GB/T 2710-2005《The measurement of leather physics and mechanical test tensile strength and elongation》It surveys
Determine leather tensile strength, tension stress, 10N load-elongation rates；According to national standard GB/T 2711-2005《Leather physics and mechanical test
The measurement of tear edge：Bilateral tearing》Measure tear strength of leather, tear edge；According to national standard GB/T2712-2005《Leather physics
With the measurement of mechanical test grain intensity and stretching, extension height：Spherical shape is burst apart experiment》Measure leather bursting strength and height of bursting apart.
Leather thickens rate=(leather thicknesses-are not filled by leather thicknesses after filling)/and is not filled by leather thicknesses * 100% (I)
The performance parameter of each experimental group is listed in table 1.
The performance of 1 resultant Leather of table
As can be seen from the table, due to embodiment one to embodiment three in strict accordance with the present invention using two layers of tanning as object
Two layers of enhancing skin base of enhancing operation preparation are carried out, example IV to embodiment six is with two layers of crust leather in strict accordance with the present invention's
Object carries out two layers of operation preparation enhancing skin base of enhancing, and not only preparation process is simple, filler used is more in filling process
It is common, and final products obtained therefrom appearance is good, relative to traditional its good mechanical performance of double-layer fur base (comparative example), enhancing effect
Fruit is apparent, can expand the use scope and economic value of two layers of resultant Leather.Comparative example is traditional double-layer fur base, does not carry out this
The enhancing of invention operates, although products obtained therefrom is more soft, mechanical property is poor, hence it is evident that not as good as enhanced by the present invention
Two layers of enhancing skin base.
Claims (6)
1. a kind of method enhancing double-layer leather intensity using filling means, it is characterised in that：Double-layer leather is successively by filling
Pre-treatment, filling, filling postprocessing working procedures obtain two layers of enhancing skin base；The double-layer leather is two layers of tanning or two layers of crust leather；
Wherein, the specific method of filling is：It will be put into rotary drum by the double-layer leather of filling pre-treatment, and tare weight 40% be added
~600% water, it is 50~80 DEG C to adjust temperature, adds the polyvinyl alcohol of tare weight 5%~50%, rotates 1~8h；Or by skin
It weighs 5%~50% polyvinyl alcohol to be dissolved in the water of tare weight 40%~600%, it is 50~80 DEG C to adjust temperature, is added and places
In the rotary drum for having the double-layer leather for being filled through pre-treatment, 1~8h is rotated；The degree of polymerization of the polyvinyl alcohol is 100~2000, alcohol
Xie Du is 50%~99%.
2. the method according to claim 1 for enhancing double-layer leather intensity using filling means, which is characterized in that filling
Specific method is：It will be put into rotary drum by the double-layer leather of filling pre-treatment, and the water of tare weight 100%~400% be added, adjusted
It is 60~75 DEG C to save temperature, adds the polyvinyl alcohol of tare weight 5%~20%, rotates 2~4h；Or by tare weight 5%~20%
Polyvinyl alcohol is dissolved in the water of tare weight 100%~400%, and it is 60~75 DEG C to adjust temperature, and addition, which is placed with, is filled through preceding place
In the rotary drum of the double-layer leather of reason, 2~4h is rotated.
3. the method according to claim 1 or 2 for enhancing double-layer leather intensity using filling means, it is characterised in that：Institute
The degree of polymerization for stating polyvinyl alcohol is 300~1000, and alcoholysis degree is 75%~90%.
4. the method according to claim 1 for enhancing double-layer leather intensity using filling means, it is characterised in that：Described two
Layer tanning is through the tanning of one or more of chrome tanning agent, zirconium tanning agent, aldehyde tanning agent, vegetable tanning agent, aluminium tanningagent, iron tannage agent, titanium tannage agent
The leather obtained after processing；Two layers of crust leather is two layers of tanning through rewetting, neutralization, retanning, dyeing, stuffing, drying, finisher
The leather obtained after sequence processing.
5. the method according to claim 1 for enhancing double-layer leather intensity using filling means, it is characterised in that：Described two
When layer leather is two layers of tanning, the filling pre-treatment includes water squeezing, shaving, weigh, rewetting, washing and neutralization, after neutralization,
The pH of double-layer leather is 4.0~9.0, and the filling post-processing includes dyeing, stuffing, washing, drying；The double-layer leather is two
When layer crust leather, the filling pre-treatment include weigh, rewetting, washing and neutralization, after neutralization, the pH of double-layer leather for 4.0~
9.0, the filling post-processing includes washing, drying.
6. the method according to claim 5 for enhancing double-layer leather intensity using filling means, it is characterised in that：After filling
Drying means in processing be take dry horse, natural loft dried, air blast extension dry it is dry, collapse dry plate, paste drying and vacuum
It is at least one of dry.
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| CN201810332274.9A CN108456754B (en) | 2018-04-13 | 2018-04-13 | Method for enhancing strength of double-layer leather by filling means |
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| CN201810332274.9A CN108456754B (en) | 2018-04-13 | 2018-04-13 | Method for enhancing strength of double-layer leather by filling means |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316437A (en) * | 2014-06-25 | 2016-02-10 | 宜宾市浩宇皮业有限责任公司 | Production process of environment-friendly cattle hide mattress |
| CN107502685A (en) * | 2017-10-25 | 2017-12-22 | 漳州香洲皮革有限公司 | The preparation method of water-fastness cow split leather |
| CN107641667A (en) * | 2017-10-25 | 2018-01-30 | 漳州香洲皮革有限公司 | Environment-friendly waterproof is without dissolution chromium cow split leather and preparation method thereof |
-
2018
- 2018-04-13 CN CN201810332274.9A patent/CN108456754B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316437A (en) * | 2014-06-25 | 2016-02-10 | 宜宾市浩宇皮业有限责任公司 | Production process of environment-friendly cattle hide mattress |
| CN107502685A (en) * | 2017-10-25 | 2017-12-22 | 漳州香洲皮革有限公司 | The preparation method of water-fastness cow split leather |
| CN107641667A (en) * | 2017-10-25 | 2018-01-30 | 漳州香洲皮革有限公司 | Environment-friendly waterproof is without dissolution chromium cow split leather and preparation method thereof |
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