CN102827964A - Ecological tanning method of Tan sheep skin - Google Patents

Abstract

The invention discloses an ecological tanning method of Tan sheep skin, comprising the following steps: edible salt, formic acid and water are mixed to obtain first mixed solution, the mixed solution stands for 60 minutes and the temperature of the mixed solution is kept at 38 DEG C; fur fatting agent and softening enzyme are added into the first mixed solution and mixed evenly to obtain softened pickling solution, and the softened pickling solution stands for 4 hours and heated to 48 DEG C; a Tan sheep skin is put in the softened pickling solution in a drum, softening enzyme is added into the softened pickling solution again, the drum is rotated continuously for 6 hours and the softened pickling solution is filtered; the filtered softened pickling solution is put again in the drum in which the Tan sheep skin is put, formic acid solution and sulfuric acid solution are added into the filtered softened pickling solution and the drum is rotated until the potential of hydrogen (PH) of the solution is 2-2.5; edible salt, formic acid, white tanning agent and water are mixed to obtain second mixed solution and the drum is rotated continuously for 4 hours; sodium formate, bicarb and soda ash are added into the drum which is filled with the second mixed solution for alkali adjustment; then the ecological tanning of the Tan sheep skin is finished.

Description

Sheep known for its fine thick wool skin ecological bating method

Technical field:

The present invention relates to the animal fur processing technique field, particularly a kind of sheep known for its fine thick wool skin ecological bating method.

Background technology:

Existing sheep known for its fine thick wool skin process for tanning mainly contains following several kinds: chromic tanning, aluminum tannage.The shortcoming that chromic tanning exists is that the skin rate is little, dermatotome is thicker, produce mao phenomenon, chroming waste liquor contaminate environment; The shortcoming that aluminum tannage exists is that neutral salt contaminate environment, the aluminium salt in the waste liquid combines the insecure fur that damages simultaneously with collegen filament.

Yet; Some regional distinctive fur needs special process for tanning could guarantee the distinctive characteristic of fur; For example; The process for tanning of Ningxia sheep known for its fine thick wool skin all is to adopt aldehyde tannage technology to carry out the true qualities that the sheep known for its fine thick wool skin could not be lost in tanning at present, " the nine roads are bent " style of using functional maintenances of the fur sheep known for its fine thick wool skin of formaldehyde tanning distinctive, but residual formaldehyde harmful, environment is polluted; Bring inconvenience for simultaneously sheep known for its fine thick wool skin manufacturer's sheep known for its fine thick wool skin outlet; For example European Union's standard code formaldehyde content control 150PPM is following, azo is lower than 30ppm, and sheep known for its fine thick wool leather armour aldehyde, the azo content of aldehyde tannage will exceed 10 times more than of European Union's standard, cause the sheep known for its fine thick wool skin to be difficult to export to Europe.

Summary of the invention:

The object of the present invention is to provide the sheep known for its fine thick wool skin ecological bating method that a kind ofly reduces formaldehyde content, improves the sheep known for its fine thick wool cortex amount that tanning goes out.

A kind of sheep known for its fine thick wool skin ecological bating method may further comprise the steps:

Softening pickling:

Edible salt, formic acid and water are mixed acquisition first mixing solutions, and left standstill 60 minutes and guaranteed that the temperature of first mixing solutions is 38 ℃;

In first mixing solutions, add fur fatting agent, macerating enzyme and stir and obtain softening pickling solution; And leave standstill after 4 hours and be warming up to 48 ℃, wherein edible salt concentration is that 60g/L, formic acid concn are that 2g/L, fur fatting agent concentration are that 2g/L, macerating enzyme concentration are 1g/L;

The sheep known for its fine thick wool skin is put into the softening pickling solution of rotary drum, and add macerating enzyme once more to softening pickling solution, and make rotary drum continue to change to cross liquid after 6 hours, wherein macerating enzyme concentration is 1～1.5g/L;

Pack into once more and be equipped with in the rotary drum of sheep known for its fine thick wool skin crossing softening pickling solution behind the liquid; And add formic acid and sulfuric acid in the softening pickling solution behind mistake liquid; And rotary drum is rotated be PH 2～2.5 rotary drum that stops operating until solution; And with reclaiming behind the liquid filtering, wherein formic acid concn is that 2g/L, sulfuric acid concentration are 2g/L;

Tanning:

Edible salt, formic acid, white tanning agent and water are mixed acquisition second mixing solutions; The PH of second mixing solutions is 3.5; Second mixing solutions is added in the rotary drum that is equipped with through the sheep known for its fine thick wool skin after the softening pickling, and rotary drum continues to rotate 4 hours and guaranteed that the temperature of second mixing solutions is 38 ℃;

In the rotary drum that second mixing solutions is housed, add sodium formiate, sodium bicarbonate, soda ash and transfer alkali, sodium formiate, sodium bicarbonate, soda ash divide that to add for three times until the second mixing solutions PH that is added with sodium formiate, sodium bicarbonate, soda ash be the tannings that the sheep known for its fine thick wool skins are accomplished in 6～6.5 backs.

Utilize sheep known for its fine thick wool skin ecological bating method provided by the invention to need not to adopt formaldehyde just can accomplish to pickling of soft and soggyization of sheep known for its fine thick wool and tanning operation; Adopt aforesaid method can dissolve and remove spandex fiber and unnecessary colloid in the dermatotome effectively; And guarantee that the sheep known for its fine thick wool skin is difficult for falling hair and dermatotome fullness ratio; Not only keep sheep known for its fine thick wool skin distinctive " nine roads are curved " style and natural pure white hair color, and reach the European Union environmental protection standard, the solution circulated utilization in the rotary drum simultaneously; So can reduce environmental pollution, reduce waste water treatment routine maintenance expense, reduce production cost.

Description of drawings:

Fig. 1 is the sheep known for its fine thick wool skin ecological bating method schema of a preferred embodiments.

Among the figure: the method steps S300～S305 that adopts nanometer macerating enzyme tanning sheep known for its fine thick wool skin

Embodiment:

Please be simultaneously referring to Fig. 1, sheep known for its fine thick wool skin ecological bating method may further comprise the steps:

Step S300 mixes acquisition first mixing solutions with edible salt, formic acid and water, and left standstill 60 minutes and guaranteed that the temperature of first mixing solutions is 38 ℃.

Step S301; In first mixing solutions, add fur fatting agent, macerating enzyme and stir and obtain softening pickling solution; And leave standstill after 4 hours and be warming up to 48 ℃, wherein edible salt concentration is that 60g/L, formic acid concn are that 2g/L, fur fatting agent concentration are that 2g/L, macerating enzyme concentration are 1g/L.

Step S302 puts into the softening pickling solution of rotary drum with the sheep known for its fine thick wool skin, and adds macerating enzyme once more to softening pickling solution, and makes rotary drum continue to change to cross liquid after 6 hours, and wherein macerating enzyme concentration is 1～1.5g/L.Crossing liquid is meant to return in the rotary drum after the softening pickling solution in the rotary drum filtered again and reuses.

Step S303; Pack into once more and be equipped with in the rotary drum of sheep known for its fine thick wool skin crossing softening pickling solution behind the liquid; And add formic acid and sulfuric acid in the softening pickling solution behind mistake liquid; And make rotary drum rotate until solution be PH2～2.5 rotary drum that stops operating, and with reclaiming behind the liquid filtering, wherein formic acid concn is that 2g/L, sulfuric acid concentration are 2g/L.

Step S304; Edible salt, formic acid, white tanning agent and water are mixed acquisition second mixing solutions; The PH of second mixing solutions is 3.5; Second mixing solutions is added in the rotary drum that is equipped with through the sheep known for its fine thick wool skin after the softening pickling, and rotary drum continues to rotate 4 hours and guaranteed that the temperature of second mixing solutions is 38 ℃.

Step S305; In the rotary drum that second mixing solutions is housed, add sodium formiate, sodium bicarbonate, soda ash and transfer alkali, sodium formiate, sodium bicarbonate, soda ash divide that to add for three times until the second mixing solutions PH that is added with sodium formiate, sodium bicarbonate, soda ash be the tannings that the sheep known for its fine thick wool skins are accomplished in 6～6.5 backs.

Utilize sheep known for its fine thick wool skin ecological bating method provided by the invention to need not to use formaldehyde; Accomplish soft and soggyization of sheep known for its fine thick wool pickling operation through step S300 to step S303, to step S305 completion sheep known for its fine thick wool skin tanning operation, the employing aforesaid method can dissolve and remove spandex fiber and unnecessary colloid in the dermatotome effectively through step S304; And guarantee that the sheep known for its fine thick wool skin is difficult for falling hair and dermatotome fullness ratio; Not only keep sheep known for its fine thick wool skin distinctive " nine roads are curved " style and natural pure white hair color, and reach the European Union environmental protection standard, the solution circulated utilization in the rotary drum simultaneously; So can reduce environmental pollution, reduce waste water treatment routine maintenance expense, reduce production cost.

Claims (1)

1. sheep known for its fine thick wool skin ecological bating method may further comprise the steps:

Softening pickling:

Edible salt, formic acid and water are mixed acquisition first mixing solutions, and left standstill 60 minutes and guaranteed that the temperature of first mixing solutions is 38 ℃;

In first mixing solutions, add fur fatting agent, macerating enzyme and stir and obtain softening pickling solution; And leave standstill after 4 hours and be warming up to 48 ℃, wherein edible salt concentration is that 60g/L, formic acid concn are that 2g/L, fur fatting agent concentration are that 2g/L, macerating enzyme concentration are 1g/L;

The sheep known for its fine thick wool skin is put into the softening pickling solution of rotary drum, and add macerating enzyme once more to softening pickling solution, and make rotary drum continue to change to cross liquid after 6 hours, wherein macerating enzyme concentration is 1～1.5g/L;

Pack into once more and be equipped with in the rotary drum of sheep known for its fine thick wool skin crossing softening pickling solution behind the liquid; And add formic acid and sulfuric acid in the softening pickling solution behind mistake liquid; And rotary drum is rotated be the PH 2-2.5 rotary drum that stops operating until solution; And with reclaiming behind the liquid filtering, wherein formic acid concn is that 2g/L, sulfuric acid concentration are 2g/L;

Tanning:

Edible salt, formic acid, white tanning agent and water are mixed acquisition second mixing solutions; The PH of second mixing solutions is 3.5; Second mixing solutions is added in the rotary drum that is equipped with through the sheep known for its fine thick wool skin after the softening pickling, and rotary drum continues to rotate 4 hours and guaranteed that the temperature of second mixing solutions is 38 ℃;

In the rotary drum that second mixing solutions is housed, add sodium formiate, sodium bicarbonate, soda ash and transfer alkali, sodium formiate, sodium bicarbonate, soda ash divide that to add for three times until the second mixing solutions PH that is added with sodium formiate, sodium bicarbonate, soda ash be the tannings that the sheep known for its fine thick wool skins are accomplished in 6～6.5 backs.