CN103319730A - Preparation method of lignocellulose for synthetic leather - Google Patents
Preparation method of lignocellulose for synthetic leather Download PDFInfo
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- CN103319730A CN103319730A CN2013102322240A CN201310232224A CN103319730A CN 103319730 A CN103319730 A CN 103319730A CN 2013102322240 A CN2013102322240 A CN 2013102322240A CN 201310232224 A CN201310232224 A CN 201310232224A CN 103319730 A CN103319730 A CN 103319730A
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Abstract
The invention discloses a preparation method of lignocellulose for synthetic leather. The method comprises the following steps of: taking wastes or leftovers processed in a wood plate industry (such as sanding powder, sawdust, wood shavings and the like) as raw materials, and performing dry bleaching, surface processing, air-drying, grinding and screening to obtain a lignocellulose product with controllable color and controllable expansion degree. According to the method disclosed by the invention, the wastes in the wood plate processing industry are taken as the raw materials, the utilization efficiency of resources is improved, and the production cost of the synthetic leather can be simultaneously reduced. A bleaching method is simple to operate, and different products can be obtained by controlling process parameters and can be applied to different synthetic leather fields.
Description
Technical field
The invention belongs to the synthetic leather field, relate in particular to a kind of preparation method of use for synthetic leather lignocellulose.
Background technology
In recent years, urethane (PU) synthetic leather is because its superior performance and price advantage develop rapid.In the wet-method synthetic leather production process, must add a certain amount of auxiliary agent to guarantee the quality of product, wherein, the auxiliary agent of consumption maximum is exactly the use for synthetic leather Microcrystalline Cellulose.Owing to added the agent of Mierocrystalline cellulose micropore, make the good springiness of product in the production process of wet-method synthetic leather, keratin softness, indexs such as ventilation property and intensity all are higher than the synthetic leather product of dry production.At present, the cellulose wadding that domestic synthetic leather factory uses is numerous in variety, and spread in performance is uneven.Though external Microcrystalline Cellulose product excellent property is expensive, and differs in its source of domestic cellulose wadding, the performance shakiness has caused bigger influence to the PU quality.Therefore need a kind of stable performance, cheap substitute.
Summary of the invention
At above-mentioned technical problem, the invention provides a kind of preparation method of use for synthetic leather lignocellulose, the lignocellulose of this method preparation: (1) raw material sources are extensive, simple to operate, production cost significantly lowers than Microcrystalline Cellulose, has tangible price advantage; (2) light specific gravity, the powder that this means equal volume adds when using as the use for synthetic leather filler, only needs less consumption, helps to reduce the comprehensive production cost of synthetic leather; (3) easier being dispersed in the dimethyl formamide has good levelling property at synthetic leather production work slurry; (4) product is various, can satisfy the demand that different leathers are produced.
Technical scheme provided by the invention is:
A kind of preparation method of use for synthetic leather lignocellulose may further comprise the steps:
Step 1, waste or tankage that the plank industry is processed carry out the dry method bleaching, adopt hydrogen peroxide and caustic soda to bleach, and in weight part, 100 parts of raw materials add 10～50 parts in hydrogen peroxide, add 1～5 part in caustic soda, and time 10-15min feeds in raw material;
Step 2, the product of described step 1 is carried out surface treatment, 1) add stablizer, in weight part, 100 parts of raw materials add 0～5 part of stablizer; 2) add whitening agent, in weight part, 100 parts of raw materials add 0～3 part in whitening agent; 3) add pigment, in weight part, 100 parts of raw materials add 0～2 part of pigment; 4) add laking agent, in weight part, 100 parts of raw materials add 0～2 part in laking agent; 5) in weight part, 100 parts of raw materials add 10～30 parts in water altogether, reinforced time 3-5min;
Step 3, to described step 2 product, stir 20-30min;
Step 4, the product of described step 3 is carried out airing, shakeout airing under 25 ℃ of physical environments, its moisture content control is 20～30%;
Step 5, described airing product is ground with ball mill;
Step 6, described grinding product is carried out sub-sieve with Ultrafine Classifier, obtain the lignocellulose product of different meshes, different colours, different turgiditys, its product granularity is 80～320 orders, and turgidity is 16～30, and color has Bai Hehuang.
Preferably, among the preparation method of described a kind of use for synthetic leather lignocellulose, in the described step 1, waste or the tankage of the processing of plank industry are sanding powder, sawdust, wood shavings etc.
Preferably, among the preparation method of described a kind of use for synthetic leather lignocellulose, in the described step 1, raw material is carried out the dry method bleaching, adopt hydrogen peroxide and caustic soda to bleach, in weight part, 100 parts of raw materials add 20～40 parts in hydrogen peroxide, add 2～4 parts in caustic soda.
Preferably, among the preparation method of described a kind of use for synthetic leather lignocellulose, in the described step 2, surface treatment comprises: 1) add stablizer, as anhydrous sodium metasilicate, metasilicate pentahydrate sodium, non-hydrate sodium metasilicate etc.; 2) add whitening agent, as toluylene biphenyl sodium disulfonate (CBS), two (5 methyl-2-benzoxazolyl) toluylene (KSN) of 4,4-etc.; 3) add pigment, as ultramarine etc.; 4) add laking agent, as cationic quaternary ammonium salt, as cetylpyridinium chloride, brocide etc.
Preferably, among the preparation method of described a kind of use for synthetic leather lignocellulose, additive level is in the described step 2: in weight part, 100 parts of raw materials add 0～3 part of stablizer, add 0～2 part in whitening agent, add 0～1 part of pigment, add 0～1 part in laking agent.
Preferably, among the preparation method of described a kind of use for synthetic leather lignocellulose, in the described step 2, all additives are all with adding after the water dissolution, and in weight part, 100 parts of raw materials add 15～25 parts in water altogether.
Preferably, among the preparation method of described a kind of use for synthetic leather lignocellulose, in the described step 4, product is carried out airing, for shakeout airing under physical environment, its moisture content control is 10～25%.
Preparation method of the present invention can obtain to have the use for synthetic leather lignocellulose of different meshes, different colours, different turgiditys.It is extensive that this method prepares raw material sources, simple to operate, and production cost is low, and price advantage is obvious, and product is various simultaneously, light specific gravity, and good dispersity, stable performance can be satisfied the demand that different leathers are produced.
Embodiment
Below the present invention is described in further detail, can implement according to this with reference to the specification sheets literal to make those skilled in the art:
A kind of preparation method of use for synthetic leather lignocellulose may further comprise the steps:
Step 1, waste or tankage that the plank industry is processed carry out the dry method bleaching, adopt hydrogen peroxide and caustic soda to bleach, and in weight part, 100 parts of raw materials add 10～50 parts in hydrogen peroxide, add 1～5 part in caustic soda, and time 10-15min feeds in raw material;
Step 2, the product of described step 1 is carried out surface treatment, 1) add stablizer, as anhydrous sodium metasilicate, metasilicate pentahydrate sodium, non-hydrate sodium metasilicate etc., in weight part, 100 parts of raw materials add 0～5 part of stablizer; 2) add whitening agent, in weight part, 100 parts of raw materials add 0～3 part in whitening agent; 3) add pigment, in weight part, 100 parts of raw materials add 0～2 part of pigment; 4) add laking agent, in weight part, 100 parts of raw materials add 0～2 part in laking agent; 5) in weight part, 100 parts of raw materials add 10～30 parts in water altogether, reinforced time 3-5min;
Step 3, to the product of described step 2, stir 20-30min;
Step 4, the product of described step 3 is carried out airing, shakeout airing under 25 ℃ of physical environments, its moisture content control is 20～30%;
Step 5, described airing product is ground with ball mill;
Step 6, described grinding product is carried out sub-sieve with Ultrafine Classifier, obtain the lignocellulose product of different meshes, different colours, different turgiditys, its product granularity is 80～320 orders, and turgidity is 16～30, and color has Bai Hehuang.
The preparation method of described a kind of use for synthetic leather lignocellulose, the raw material in the described step 1 is for waste or the tankage of the processing of plank industry, as sanding powder, sawdust, wood shavings etc.
The preparation method of described a kind of use for synthetic leather lignocellulose, the product in the described step 5 is the lignocellulose powder of different meshes, different colours, different turgiditys, and its granularity is 80～320 orders, and turgidity is 16～30, and color has Bai Hehuang.
The preparation method of described a kind of use for synthetic leather lignocellulose, the dry method bleaching is to adopt hydrogen peroxide and caustic soda to bleach in the described step 1.In weight part, 100 parts of raw materials add 10～50 parts in hydrogen peroxide, add 1～5 part in caustic soda.
The preparation method of described a kind of use for synthetic leather lignocellulose, the surface treatment that described step 2 is carried out comprises: 1) add stablizer, as anhydrous sodium metasilicate, metasilicate pentahydrate sodium, non-hydrate sodium metasilicate etc.; 2) add whitening agent, as toluylene biphenyl sodium disulfonate (CBS), two (5 methyl-2-benzoxazolyl) toluylene (KSN) of 4,4-etc.; 3) add pigment, as ultramarine etc.; 4) add laking agent, as cationic quaternary ammonium salt, as cetylpyridinium chloride, brocide etc.
The preparation method of described a kind of use for synthetic leather lignocellulose, in weight part, 100 parts of raw materials add 0～5 part of stablizer, add 0～3 part in whitening agent, add 0～2 part of pigment, add 0～2 part in laking agent.
The preparation method of described use for synthetic leather lignocellulose, all additives are all with adding after the water dissolution, and in weight part, 100 parts of raw materials add 10～30 parts in water altogether.
The preparation method of described a kind of use for synthetic leather lignocellulose, the airing of described step 3 is handled, and for the product to described step 2 under 25 ℃ of physical environments shakeouts airing, its moisture content control is 5～30%.
The preparation method of described a kind of use for synthetic leather lignocellulose, the milled processed of described step 4 adopt ball mill that the product of described step 3 is carried out milled processed.
The preparation method of described a kind of use for synthetic leather lignocellulose, the sub-sieve of described step 5 adopts Ultrafine Classifier that the product of described step 4 is carried out sub-sieve.
The waste of plank industry processing or tankage carry out certain dry method bleaching to be handled, and controls product bleaching degree and amount of cure by the consumption of control hydrogen peroxide and caustic soda; Control the product turgidity by adding stablizer; By whitening agent, pigment.The final color of control such as laking agent product; By grinding and sub-sieve control product granularity size.
Embodiment one
A kind of preparation method of use for synthetic leather lignocellulose may further comprise the steps:
Step 1, the waste sanding powder that the plank industry is processed carry out the dry method bleaching, adopt hydrogen peroxide and caustic soda to bleach, and in weight part, 100 parts of raw materials add 30 parts in hydrogen peroxide, add 3 parts in caustic soda, and time 10-15min feeds in raw material;
Step 2, the product of described step 1 is carried out surface treatment, 1) add the stablizer anhydrous sodium metasilicate, in weight part, 100 parts of raw materials add 3 parts of stablizers; 2) add whitening agent toluylene biphenyl sodium disulfonate (CBS), in weight part, 100 parts of raw materials add 1 part in whitening agent; 3) in weight part, 100 parts of raw materials add 30 parts in water, charge temperature 3-5min altogether;
Step 3, to the product of described step 2, stir 20min;
Step 4, the product of described step 3 is carried out airing, shakeout airing under 25 ℃ of physical environments, its moisture content control is 25 ± 1%;
Step 5, described airing product is ground with ball mill;
Step 6, described grinding product is carried out sub-sieve with Ultrafine Classifier, product is general white lignocellulose powder, and granularity is 320 orders, and turgidity is 18.
Embodiment two
A kind of preparation method of use for synthetic leather lignocellulose may further comprise the steps:
Step 1, the waste sawdust that the plank industry is processed carry out the dry method bleaching, adopt hydrogen peroxide and caustic soda to bleach, and in weight part, 100 parts of raw materials add 15 parts in hydrogen peroxide, add 1.5 parts in caustic soda, and time 10-15min feeds in raw material;
Step 2, the product of described step 1 is carried out surface treatment, 1) add the stablizer metasilicate pentahydrate sodium, in weight part, 100 parts of raw materials add 1 part of stablizer; 2) add the pigment ultramarine, in weight part, 100 parts of raw materials add 1 part in ultramarine; 3) add the laking agent cetylpyridinium chloride, in weight part, 100 parts of raw materials add 1 part in laking agent; 3) in weight part, 100 parts of raw materials add 20 parts in water altogether, reinforced time 3-5min;
Step 3, to the product of described step 2, stir 30min;
Step 3, the product of described step 3 is carried out airing, shakeout airing under 25 ℃ of physical environments, its moisture content control is 21 ± 1%;
Step 4, described airing product is ground with ball mill;
Step 5, described grinding product is carried out sub-sieve with Ultrafine Classifier, product is yellow lignocellulose powder, and granularity is 320 orders, and turgidity is 22.
Embodiment three
A kind of preparation method of use for synthetic leather lignocellulose may further comprise the steps:
Step 1, the waste wood shavings that the plank industry is processed carry out the dry method bleaching, adopt hydrogen peroxide and caustic soda to bleach, and in weight part, 100 parts of raw materials add 20 parts in hydrogen peroxide, add 2 parts in caustic soda, and time 10-15min feeds in raw material; Step 2, the product of described step 1 is carried out surface treatment, 1) add the stablizer metasilicate pentahydrate sodium, in weight part, 100 parts of raw materials add 2 parts of stablizers; 2) add the pigment ultramarine, in weight part, 100 parts of raw materials add 0.5 part in ultramarine; 3) add the laking agent cetylpyridinium chloride, in weight part, 100 parts of raw materials add 0.5 part in laking agent; 3) in weight part, 100 parts of raw materials add 25 parts in water altogether, reinforced time 3-5min;
Step 3, to the product of described step 2, stir 20min;
Step 4, the product of described step 3 is carried out airing, shakeout airing under 25 ℃ of physical environments, its moisture content control is 18 ± 1%;
Step 5, described airing product is ground with ball mill;
Step 6, described grinding product is carried out sub-sieve with Ultrafine Classifier, product is the lignocellulose powder of grey, and granularity is 320 orders, and turgidity is 20.
Claims (6)
1. the preparation method of a use for synthetic leather lignocellulose is characterized in that, may further comprise the steps:
Step 1, raw material is carried out dry method bleaching;
Step 2, the product of described step 1 is carried out surface treatment, add reagent such as stablizer, whitening agent, pigment and laking agent;
Step 3, the product of described step 2 is carried out airing;
Step 4, described airing product is ground;
Step 5, described grinding product is carried out sub-sieve, obtain the lignocellulose product of different meshes, different colours, different turgiditys.
2. the preparation method of a kind of use for synthetic leather lignocellulose according to claim 1, it is characterized in that the dry method bleaching is to adopt hydrogen peroxide and caustic soda to bleach in the described step 1, in weight part, 100 parts of raw materials add 10～50 parts in hydrogen peroxide, add 1～5 part in caustic soda.
3. the preparation method of a kind of use for synthetic leather lignocellulose according to claim 1 is characterized in that, the surface treatment that described step 2 is carried out comprises: 1) add stablizer, as anhydrous sodium metasilicate, metasilicate pentahydrate sodium, non-hydrate sodium metasilicate etc.; 2) add whitening agent, as toluylene biphenyl sodium disulfonate (CBS), two (5 methyl-2-benzoxazolyl) toluylene (KSN) of 4,4-etc.; 3) add pigment, as ultramarine etc.; 4) add laking agent, as cationic quaternary ammonium salt, as cetylpyridinium chloride, brocide etc.
4. the preparation method of a kind of use for synthetic leather lignocellulose according to claim 3 is characterized in that, in weight part, 100 parts of raw materials add 0～5 part of stablizer, add 0～3 part in whitening agent, add 0～2 part of pigment, add 0～2 part in laking agent.
5. the preparation method of a kind of use for synthetic leather lignocellulose according to claim 4 is characterized in that, all additives are all with adding after the water dissolution, and in weight part, 100 parts of raw materials add 10～30 parts in water altogether.
6. the preparation method of a kind of use for synthetic leather lignocellulose according to claim 1 is characterized in that, the airing of described step 3 is handled, and the product to described step 2 under 25 ℃ of physical environments shakeouts airing, and its moisture content control is 20～30%.
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