CN103215814B - Non-strength-reducing easy-care finishing method for pure cotton fabrics - Google Patents

Abstract

The invention discloses a non-strength-reducing easy-care finishing method for pure cotton fabrics, which is applied to an easy-care finishing process in the process of dyeing and finishing cotton fabrics. The method comprises the following steps of: A, preparing an easy-care finishing working solution, wherein the easy-care finishing working solution is prepared from the following components in parts by weight: 60 parts of etherified modified resins, 100 parts of modified polyether polyurethane, 30 parts of modified amino silicone, and 40 parts of PVC emulsion 20; B, padding: adjusting the pH value of the easy-care finishing working solution obtained in the step A to be 4-5, and dipping and rolling a fabric, so that the liquid carrying ratio of the fabric is 70%; and implementing a post-treatment process on the obtained product; C, drying: drying the fabric obtained in the step B for 2 min at a temperature of 95 DEG C; D, preshrinking treatment: carrying out conventional preshrinking treatment on the fabric obtained in the step C; and E, baking: baking the obtained product for 1 min at a temperature of 160 DEG C. The wear resistance and seam slippage of the obtained product are significantly improved, each index is superior to that of the existing process, and the product strength is almost not damaged.

Description

Pure cotton fabric strong noniron finish method do not fall

Technical field

The present invention relates to a kind of dyeing and printing process technical field, especially a kind of senior noniron finish that is applicable to textile woven.

Background technology

The features such as COTTON FABRIC has feel nature, and moisture absorption is ventilative antistatic, non-stimulated to human body, comfortable and easy to wear, and there is degradability.Be the environment-friendly plus material that praised highly by consumer, still, there is poor, the easy deformation of wrinkle resistance, shortcoming that washing shrinkage is large in COTTON FABRIC, therefore COTTON FABRIC is carried out to noniron finish very necessary always.Noniron finish is in improving pure cotton fabric crease recovery, improving the rear flatness of pure cotton fabric washing, the physical property of COTTON FABRIC is had to loss significantly, for slim pure cotton fabric, because itself powerful absolute value is lower, therefore will select not reduce powerful wash and wear finisher, also will choose suitable finishing technique simultaneously, after guarantee noniron finish, fabric has good dry wet crease recovery performance, reduce strength loss simultaneously as far as possible, do not affect the taking of fabric.

The object of anti-crease finishing and effect are to make textiles have the easy reinstatement of wrinkle that is difficult for producing wrinkle or generation, and in use can keep flat outward appearance very.Its method, except RESIN FINISH, can also adopt the methods such as crosslinked; RESIN FINISH is to arrange with macromolecular material.Cotton fiber belongs to cellulose fibre, and the high polymer that cellulose fibre is made up of dehydration glucose unit.A cellulosic molecule is the long-chain of 6000-7000 unit compositions.These cellulose long-chain molecules are arranged parallel to each other and mutually form hydrogen bond and Van der Waals force in some regions, and such region is called crystalline region.These region inner cellulose chain close and firm together with adjacent molecule chain combination, can believe and not have space can allow hydrone and molecular resin enter crystalline region inner cellulose is intermolecular.In addition, because the brute force of adjacent fiber element interchain is very strong, so the relative motion of cellulose chain is very difficult, even if produce the relative displacement of molecule, treat stress elimination, its adhesion just makes displacement molecule be returned to origin-location at once, so it is wrinkle resistant to think that crystal region is used for.Modern theory is thought, exists the poor amorphous region of sequence between the crystal region of cellulose molecular chain, is not arrange very orderly at this region inner cellulose molecule.Asking every larger between the fibrous strands of unformed area, gravitation between adjacent chain is also lower than crystalline region, so between the cellulose chain of amorphous region, hydrone, molecular resin and dye molecule all can infiltrate, due to fiber adjacent chain ask the gravitation stress that lower wrinkle cause can make cellulose chain produce relative displacement, once stress is removed, because do not have enough restraining forces can make cellulosic molecule get back to its original position yet, so just make fabric produce wrinkle, so wrinkle can think unformed area produce.In order to make fiber or fabric there is crease resistance, just must ask and increase some connections at amorphous region next-door neighbour's cellulosic molecule.When processing, fabric will keep needed shape, the molecule of introducing so at least should have two above groups that can react with cellulose, under suitable catalyst condition, molecule is commonly called weaving resin like this, is in fact called as " preshrunk body " comparatively suitable.The cross linkage of cellulose chain also must be considered other two factors: the cross linkage of the first, introducing must, in tension, if improve fiber and wrinkle resistance or the rivel stability of fabric under regular service conditions, also will keep this condition while processing, second, cellulose will be swelling after absorbing moisture, no matter be under standard state, absorb moisture or be immersed in the water or the aqueous solution in, swelling is to ask because hydrone enters the cellulose chain of unformed area, force the result that chain is pushed open, if cellulose fibre interlinkage carries out under height solvent swelling state, for example use inorganic acid and formalin treatment of cellulose fabrics, in the time drying, cellulose is with regard to flat contracting, cross linkage is just lax like this, under shrivelled condition, because wrinkle cause the relative motion of cellulosic molecule, make so lax cross linkage only stretching and own.Because cross linkage will be made displacement molecule reset into origin-location by the stretching caused stress of part, but cross linkage Atom will be offset above-mentioned restoring force around the transfer of valence link, make deformation keep minimum position.In sum in hygrometric state or other non-aqueous medias, under highly swelling shape, carry out covalent bonding, consequently there is hygrometric state wrinkle resistance and retention, but dry state wrinkle resistance and retention are very little, as dry state under at high humidity is cured formation covalent bonding, consequently there is dry state wrinkle resistance and retention, equally also there is hygrometric state wrinkle resistance and retention to a certain degree.In addition dry state is cured cross linkage and can be reduced cellulosic water suction and swelling ability, introduces cross linkage in cellulose, can not only obtain required result, i.e. wrinkle resistance, retention and being easy to property, also can bring critical defect, has reduced physical strength.The crease-resistant effect of cellulose base fiber fabric is mainly to rely on reactive groups a large amount of on cellulosic molecule and finishing agent to be cross-linked, and the relative displacement of asking that has limited construction unit obtains.Be commonly considered as owing to being subject to after larger External Force Acting, in fiber supramolecular structure, each region is subject to effect of stress and produces deformation in various degree, between fiber basic structural unit, there is relative displacement, cause original hydrogen bond rupture, and re-established the new Hydrogen Bond Systems that is difficult to reply in new position, make the deformation of fiber or fabric can not get recovering to cause.Therefore about the crease-resistant mechanism of cellulose fibre, it is generally acknowledged in crease-resistant (non-ironing) dressing liquid, the effect of finishing agent has two aspects: the constraint effect producing after the reactive group generation cross-linking reaction due to finishing agent and fiber molecule on the one hand, is restricted the relative displacement of fibre structure unit, on the other hand, because having occurred to react, finishing agent and fiber molecule introduce high-octane cross-bond, the elasticity of asking that has increased fibre structure unit increased each construction unit side and produced the ability that is returned to origin-location after relative displacement, thereby increase the elasticity recovery of fiber, therefore the wrinkle resistance of fabric is improved, and the cellulose macromolecule that cotton fiber is got up by 1-4 glucoside key connecting by β-D glucose forms, in cellulosic molecule, on each glucose ring, retain three free hydroxyl that can form hydrogen bond, so cotton fabric crease-shedding effect is mainly to rely on reactive groups a large amount of on cellulosic molecule and the crosslinked relative displacement having limited between construction unit of finishing agent to obtain.

For a long time, what the anti-crease finishing of COTTON FABRIC used is aldehyde (acyl) amine condensation resin, particularly thermosetting N-hydroxymethyl resin and N-methylol amide compounds, as hydroxymethyl-2 dihydroxy-ethylene urea (Dimethylol dihydroxy ethylene urea DMDHEU is called for short 2D resin), trimethylol melamine (THMM), dimethylol urea (Dimethylolurea), dihydroxymethyl ethylene urea, dihydroxymethyl propylene urea, dihydroxymethyl alkyl tetrahydro triazinone, and four acetal resins etc.Wherein maximum with the application of 2D resin, 2D resin and arrangement product thereof deposit with wearing process in there is release formaldehyde problem, easily health is damaged.What is more important, the finishing technique of urea aldehyde or phenolic aldehyde preshrunk body, due to the poor stability of preshrunk body and dressing liquid, the fabric after arrangement has the shortcoming of the poor and powerful decline of yellowing, feel.

Summary of the invention

The technical problem to be solved in the present invention is to provide the strong noniron finish method of not falling of a kind of pure cotton fabric, there is easy to operate and manageable feature, can solve purified cotton high grade high density fabric powerful problem declining in the time doing noniron finish, in making fabric dp rank in the time of noniron finish reach 3.5 grades, brute force is not damaged substantially, greatly improves the taking of COTTON FABRIC.

For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.

Pure cotton fabric strong noniron finish method do not fall, be applied to the iron-free finishing process that COTTON FABRIC dyeing and finishing adds man-hour, its step comprises:

The preparation of A, noniron finish working solution, the formula of evaluation work liquid is by ratio of weight and the number of copies:

Etherification modified resin, 50-70 part;

Modified polyether polyurethane, 90-110 part;

Modified amido silicon, 20-40 part;

PVC emulsion, 30-50 part;

Water, 730-810 parts;

B, pad, the pH value of set-up procedure A gained noniron finish working solution is 4-5,15 DEG C-36 DEG C of temperature, and fabric one soaks one and rolls, liquid carrying rate 65%-75%; Products obtained therefrom enters aftertreatment technology.

As a preferred technical solution of the present invention, in steps A, described etherification modified resin etherification modified is with diethylene glycol (DEG), phthalic anhydride and resin condensation reaction, forms stable ehter bond, makes powerful increase after textile finishing.

As a preferred technical solution of the present invention, in steps A, the modification of described modified polyether polyurethane is by the etherification reaction of oxirane and polyurethane, improves reactivity and the hydrophily of polyurethane.

As a preferred technical solution of the present invention, in steps A, the modification of described modified amido silicon is amino silicon to be added to polyether block increase hydrophily and the flexibility of amino silicon, reduces fabric xanthochromia.

As a preferred technical solution of the present invention, in steps A, the concrete formula that calculates by ratio of weight and the number of copies noniron finish working solution is:

Etherification modified resin EMT-16,60 parts;

Modified polyether polyurethane PU, 100 parts;

Modified amido silicon, 30 parts;

20,40 parts of PVC emulsions;

Water, 770 parts.

As a preferred technical solution of the present invention, the method also comprises following subsequent processing steps:

C, oven dry are dried 1min-3min by step B gained fabric at 90 DEG C of-100 DEG C of temperature;

D, preshrunk processing, carry out conventional preshrunk processing by step C gained fabric;

E, bake, product at 140 DEG C of-180 DEG C of temperature, bake 0.5min-1.5min.

The beneficial effect that adopts technique scheme to produce is: in finisher solution of the present invention, have nanoscale and disperse self-crosslinking polyether-polyurethane, make the surface of polyurethane and fiber molecule form fine and close film, nanoscale polyurethane can form interspersed hinge with the amorphous region of fiber molecule, thereby make amorphous region tightr, thereby improved the brute force of fabric.The present invention can solve purified cotton high grade high density fabric powerful problem declining in the time doing noniron finish, make fabric dp rank in the time of noniron finish reach 3.5 grades in brute force substantially do not damage, greatly improve the taking of COTTON FABRIC.

Applicant has drawn technical scheme of the present invention by a large amount of R&D works, and has verified beneficial effect of the present invention by a series of testing experiment.Specific as follows:

Method of testing and standard that each test adopts are:

(1) DP value: according to AATCC135 " detection of fabric washing change in size " and AATCC124-2001 " repeatedly fabric face outward appearance after family's laundering ";

(2) fabric ultimate strength test: according to GB GB/T3932-1997 " textile fabric tensile property part 1: mensuration-galley proof method of ultimate strength and extension at break ";

(3) fabric tearing brute force test: according to GB GB/T3917.1-1997 " textile fabric tear properties r part: the mensuration one impact pendulnm method of tearing brute force ";

(4) free formaldehyde content test: according to GB GB/T2912.1-1998, adopt aqueous extraction method to test the content of Testing Method of Free Formaldehyde in Textiles;

(5) washing shrinkage test: according to AATCC method of testing 1352003 " extremely dimensionless variation after scalding ";

(6) suture slippage test: according to ASTMD43495 " sewing up the standard method of test of the sealing disengagement of measuring woven by standard ";

(7) feel grading: carry out feel grading from flexibility, sense of fullness, smooth feeling three aspects:, be divided into 5 grades, 1 grade the poorest, and 5 grades of the bests, see the following form.

Feel grading

5	4	3	2	1
					Very good	Well	Slightly good	Slightly poor	Poor

Test 1. solution stability testings

1,25 DEG C of working solutions of the present invention are placed 24 hours. there is no layering and floating oil situation;

2, by working solution of the present invention in the situation that turning for 25 DEG C per minute 100, stir 2 hours, there is no layering and floating oil situation.

Test 2. impacts of etherification modified resin EMT16 on DP grade and pulling force and tearing force, result sees table:

Known by upper table, along with the raising of finishing agent consumption, after washing, the DP grade of fabric improves gradually, but brute force is also along with decline.This is due to the raising along with wash and wear finisher and catalyst amount, and the degree of the crosslinking degree of fabric and acidic catalyst degraded increases.In the time that finishing agent consumption is 60g/L, after arranging, the DP grade of fabric can reach 3.5 grades, but fabric strength damage is serious.

Test the impact of 3. modified polyether polyurethane PUs on DP grade and pulling force and tearing force, result sees table:

Known by upper table, along with the raising of finishing agent consumption, after washing, the DP grade of fabric improves gradually, and brute force is also along with rising.This is due to the raising along with PU consumption, and the crosslinking degree degree of fabric increases.In the time that finishing agent consumption is 100g/L, after arranging, the DP grade of fabric can reach 3.5 grades, and brute force also increases at most, can offset falling by force of resin.The increase of Pu consumption can prevent the relative sliding of fiber molecule, thereby also obtains wrinkle resistant effect.

The impact of test 4.PVC emulsion 20 on DP grade and pulling force and tearing force, result sees table:

As seen from the above table, along with the raising of finishing agent consumption, after washing, the DP change of rank of fabric is little, and brute force increases along with the increase of consumption, but changes little to 40 grams later.

Test the impact of 5. temperature on DP grade and pulling force and tearing force, result sees table:

As seen from the above table, along with the rising DP grade of temperature rises, but strength loss increase reduces the wearability of fabric, and two kinds of technique best joints are at 160 degree.

Test the impact of 6. aminosilicone emulsifiers on DP grade and pulling force and tearing force, result sees table:

From above experimental data, aminosilicone emulsifier improves best to the tearing force of fabric, after 30 grams, the amplitude of raising no longer clearly, considering cost and index two aspects, finally this process choice 30 grams per liters.

Test the contrast of 7. techniques and present technique, result sees table:

By with the contrast of two kinds of products of simple resin noniron finish, we can find, arrange by our technology the fabric of making, powerful and non-ironing index is all significantly better than traditional technique.Wherein, " A technique " is as follows with the weight ratio formula of " B technique ":

Test the water-fastness experiment of 8. product, result sees table:

?	5 times	10 times	15 times	20 times
					DP grade	3.5	3.5	3.2	3.2
Formaldehyde	16	5	?	?

Due to the nano level polyurethane that this fabric adopts, good film-forming property, hinge is abundant, is a kind of noniron finish method of washable

The strength loss situation that test 9. arranges through this technique, result sees table:

Relative and traditional noniron finish, powerful index will more than 20%, thoroughly improve the taking of clothes.

Detailed description of the invention

Following examples describe the present invention in detail.Various raw material used in the present invention and items of equipment are conventional commercially available prod, all can be bought directly and be obtained by market.Wherein, the manufacturer of etherification modified resin EMT-16 is Wuxi Yicheng Chemical Co., Ltd., the manufacturer of modified polyether polyurethane PU is Tuo Na chemical company, the manufacturer of modified amido silicon is that Hensel steps chemical company, and the manufacturer of PVC emulsion 20 is Shijiazhuang belt biochemical industry Co., Ltd.

Embodiment 1

Pure cotton fabric strong noniron finish method do not fall, be applied to the iron-free finishing process that COTTON FABRIC dyeing and finishing adds man-hour, its step comprises:

The preparation of A, noniron finish working solution, the formula of evaluation work liquid is by ratio of weight and the number of copies:

Etherification modified resin EMT-16,60 parts;

Modified polyether polyurethane PU, 100 parts;

Modified amido silicon, 30 parts;

Solid content in emulsion is 20% PVC emulsion, 40 parts;

Water, 770 parts;

B, pad, utilizing the pH value of acetic acid set-up procedure A gained noniron finish working solution is 4-5, and fabric one soaks one and rolls, liquid carrying rate 70%; Products obtained therefrom enters aftertreatment technology;

C, oven dry are dried 2min by step B gained fabric at 95 DEG C of temperature;

D, preshrunk processing, carry out conventional preshrunk processing by step C gained fabric;

E, bake, product at 160 DEG C of temperature, bake 1min; Products obtained therefrom ABRASION RESISTANCE and seam slippage are all significantly increased, and indices is all due to existing technique, and product strength does not almost damage.

Foregoing description only proposes as the enforceable technical scheme of the present invention, not as the Single restriction condition to its technical scheme itself.

Claims (2)

1. Pure cotton fabric strong noniron finish method do not fall, be applied to the iron-free finishing process that COTTON FABRIC dyeing and finishing adds man-hour, its characterization step comprises:

   The preparation of A, noniron finish working solution, the formula of evaluation work liquid is by ratio of weight and the number of copies:

   Etherification modified resin EMT-16,60 parts;

   Modified polyether polyurethane, 100 parts;

   Modified amido silicon, 30 parts;

   Solid content is 20% PVC emulsion, 40 parts;

   Water, 770 parts;

   B, pad, the pH value of set-up procedure A gained noniron finish working solution is 4-5,15 DEG C-36 DEG C of temperature, and fabric one soaks one and rolls, liquid carrying rate 65%-75%; Products obtained therefrom enters aftertreatment technology;

   Wherein, in steps A, described etherification modified resin EMT-16 etherification modified is with diethylene glycol (DEG), phthalic anhydride and resin condensation reaction, forms stable ehter bond, makes powerful increase after textile finishing;

   In steps A, the modification of described modified polyether polyurethane is by the etherification reaction of oxirane and polyurethane, improves reactivity and the hydrophily of polyurethane;

   In steps A, the modification of described modified amido silicon is amino silicon to be added to polyether block increase hydrophily and the flexibility of amino silicon, reduces fabric xanthochromia.
2. Pure cotton fabric according to claim 1 strong noniron finish method do not fall, it is characterized in that: the method also comprises following subsequent processing steps:

   C, oven dry are dried 1min-3min by step B gained fabric at 90 DEG C of-100 DEG C of temperature;

   D, preshrunk processing, carry out conventional preshrunk processing by step C gained fabric;

   E, bake, product at 140 DEG C of-180 DEG C of temperature, bake 0.5min-1.5min.