CN101619520B - Degradable composite spunlaced nonwovens and manufacturing method thereof - Google Patents

Abstract

The invention discloses degradable composite spunlaced nonwovens with thick and soft feel, fine water absorptivity and good dedusting effect and a manufacturing method thereof. For the degradable composite spunlaced nonwovens, spunlaced processing is carried out on the an upper layer, an intermediate layer and a lower layer by an unwinding method in a on-line or off-line manner, the upper layer is a degradable fiber carded web, the intermediate layer is wood pulp fiber air laying and the lower layer is polylactic acid nonwovens. The manufacturing method comprises the following steps of wood pulp fiber airlaying, degradable fiber opening picking, carded web, spunlacing and baking, which respectively controls an airlaying conveying fan, a forming suction fan, recycling suction fan efficiency, an opening picking gauge, carded main cylinder speed, chest cylinder speed and up-down random roller speed, pressure of each water stabs head of spunlacing, baking suction machine, circulation fan, exhaust fan efficiency, baking temperature and the like.

Description

Degradable composite spunlaced non-weaving cloth and production method

Summary of the invention:

The present invention relates to a kind of water jet bonding composite non-woven cloth and production method, degradable composite spunlaced non-weaving cloth and production method that thick soft, the good water absorption of especially a kind of feel, good dedusting effect, cost be low, have degradation function

Background technology:

The applied range model of hydro-entangled non-woven fabric can be applicable to a plurality of fields such as life, medical treatment, industry.Can be used for cloth for wiping or dusting, Moistured towel, compressed towel etc. as the daily necessities aspect; The health care aspect can be used for medical sheet, pillowcase, the tablecloth etc.; The industrial goods aspect can be used for wiper, laboratory clothing or the like.Existing hydro-entangled non-woven fabric all is to be mixed into raw material with 70% viscose glue, 30% terylene basically, and the individual layer hydro-entangled non-woven fabric that method online or that off-line stings by water is tangled and formed exists following problem:

1. the cost of main component viscose goes up and the global provisioning anxiety year by year, causes the cost of product higher relatively;

2. because of polyster fibre belongs to oil product, in natural environment, can't degrade, cause reject product (especially disposable wipe) to cause bigger pressure to environmental protection.

Although but the fiber of natural degradations such as easy degradation of fibers such as at present existing as viscose glue, day silk, PLA fiber, PVA fiber and wood pulp fibre, acid fiber by polylactic also stings the relevant report that is combined into goods with easy degradation of fibers carding, wood pulp fibre air lay and polylactic acid non-weaving cloth water up to now.

Summary of the invention:

The present invention is in order to solve existing in prior technology the problems referred to above, and thick soft, the good water absorption of a kind of feel, good dedusting effect, cost are low, have the degradable function degradable composite spunlaced non-weaving cloth and production method are provided.

Technical solution of the present invention is: a kind of degradable composite spunlaced non-weaving cloth, upper strata, intermediate layer and lower floor adopt online or off-line processes through the water thorn by the debatching mode, and the upper strata is that easy degradation of fibers carding, intermediate layer are that wood pulp fibre air lay, lower floor are polylactic acid non-weaving cloths.

A kind of production method of degradable composite spunlaced non-weaving cloth comprises the wood pulp fibre air lay; Easy degradation of fibers opening picking, carding; Upper strata, intermediate layer and lower layer of water thorn combined shaping and baking step is characterized in that:

A. spacing between the card stripper of bale opener and the stripping hired roughneck in the described easy degradation of fibers opening picking step in 5～7 roads;

B. the main cylinder speed of combing is 900～950rpm, breast cylinder speed 500～550rpm, mixed and disorderly roller speed 1150～1300rpm up and down in the described easy degradation of fibers combing step;

C. two water thorns of first rotary drum of described water thorn combined shaping step (prewet and just sting) pressure is respectively 35bar, 80bar; The second rotary drum water jet (anti-thorn) pressure is 0; Two water jets of the 3rd rotary drum (just stinging) pressure is respectively 110bar, 130bar; Two water jet pressure of the 4th rotary drum (anti-thorn is repaired) are respectively 70bar, 0;

D. the sucktion fan efficient of described baking step is respectively 80%, 80%, 65%, three circulating fans and exhaust fan efficient are 60% in the dryer, oven temperature is 115 ℃.

The present invention is with easy degradation of fibers carding, wood pulp fibre air lay and polylactic acid non-weaving cloth is online or off-line tangles trilaminate material through the method for water thorn by the debatching mode, forms hydro-entangled non-woven fabric, has following advantage:

1. because the raw material of PLA come from crops, and the raw material of wood pulp fibre comes from pulp, these two kinds of materials all have the natural degradation function, easy in addition fiber web of degrading, thereby having 100% natural degradation function, product becomes required water of plant growth and carbon dioxide but imbed the next natural degradation in ground after use is discarded, environment without any pollution, is belonged to environment-friendly products.

2. because the upper strata uses is easy degradation of fibers carded web, its fiber itself has good water imbibition, by fluffy and soft between the fiber after the combing; Lower floor uses is the non-weaving cloth that the PLA superfine fibre of thin grammes per square metre is bonded, and it is soft, electrostatic precipitation is effective; The centre is the fabulous wood pulp fibre air lay of water imbibition; Thereby thick soft, the good water absorption of the product feel of trilaminate material after compound and have good dust removing effects.

The specific embodiment:

The upper strata of the embodiment of the invention is a carding, the easy degradation of fibers of embodiment 1 is that 100% viscose glue, embodiment 2 easy degradation of fibers are 100% day silks, the lower floor of embodiment 1,2 is a polylactic acid non-weaving cloth, the centre accompanies the wood pulp fibre air lay, and online or off-line tangles through the method processing of water thorn by the debatching mode and forms.

The concrete production method of embodiment 1,2 is:

A. by existing air lay equipment (model be A.CELLI WINGFORMER as Italian import equipment), wood pulp board is broken into wood pulp fibre and is paved into uniform net, promptly form the wood pulp fibre air lay.Spherical for guarantee that wood pulp fibre after the fragmentation does not form in conveyance conduit, ducted flow velocity must be controlled at 17～25m/s, and the efficient of conveying fan is 110%; For guaranteeing that wood pulp evenly becomes net, fiber does not produce floating, and the efficient of elementary sucktion fan is 110%, and the negative pressure-pumping fan efficiency is followed successively by 75%, 72%, 82% from left to right under the moulding lace curtaining, and sucktion fan efficient is 30% under the pressure roller; For guaranteeing do not have broken good wood pulp fibre in time to recycle, three sucktion fan efficient of recirculation system are respectively 113%, 90%, 95%;

B. easily the degradation of fibers opening picking can use Germany to produce model to be TEMAFA1600 opening picking processor because easy degradation of fibers denser, thereby spacing between the card stripper of its opening picking and the stripping hired roughneck be 5～7 roads, with fortifying fibre shredding degree;

C. easy degradation of fibers carding can be used existing equipment, but main cylinder speed is 900～950rpm, breast cylinder speed 500～550rpm, mixed and disorderly roller speed 1150～1300rpm up and down;

D. the easy degradation of fibers carding in upper strata, intermediate layer wood pulp fibre air lay and polylactic acid non-weaving cloth are carried out water thorn combined shaping.Polylactic acid non-weaving cloth can outsourcing, also can be 200510029250 patent of invention disclosed " preparation method of spinning and conglutinating method polylactic acid nonwovens " preparation according to China Patent No..

Owing to cross viscose web or tencel fiber net through carding machine breast cylinder, main cylinder and mixed and disorderly up and down combing, crisscross between its fiber, has stronger cohesive force, fluffy and the polylactic acid non-weaving cloth of wood pulp fibre air lay is thin and soft in addition, thereby use existing water thorn equipment to carry out water when thorn, about the common low 10bar of individual layer Hydroentangled product of water thorn pressure ratio, the water jet pressure on four rotary drums is as shown in table 1:

Table 1

The water jet sequence number

1.1

1.2

2.1

3.1

3.2

4.1

4.2

Pressure (bar)

25

65

0

68

80

60

0

E. oven dry.Because the water absorption rate of wood pulp fibre is all than higher, the poly-lactic acid material degradation temperature is lower in addition, thereby three sucktion fan efficient is 80%, 80%, 65% respectively in the spun-laced machine, three circulating fans and exhaust fan efficient are 60% in the dryer, oven temperature is 115 ℃.

The upper strata of product of the present invention is 30g/m ², the middle level is 20g/m ², lower floor is 10g/m ², the grammes per square metre scope of entire product is at 45～200g/m ²The performance comparison of embodiment 1,2 and traditional use 70% viscose glue, common Hydroentangled product (contrast piece 1) that 30% terylene is produced is as shown in table 2:

Table 2

Conclusion: same 60g/m ²Product, the thickness of the embodiment of the invention 1,2, water absorption rate and longitudinal tensile strain rate etc. all are better than general Hydroentangled product.

Claims (1)

1. the production method of a degradable composite spunlaced non-weaving cloth comprises the wood pulp fibre air lay; Easy degradation of fibers opening picking, carding; Upper strata, intermediate layer and lower layer of water thorn combined shaping and baking step is characterized in that:

A. spacing between the card stripper of bale opener and the stripping hired roughneck in the described easy degradation of fibers opening picking step in 5～7 roads;

B. the main cylinder speed of combing is 900～950rpm, breast cylinder speed 500～550rpm, mixed and disorderly roller speed 1150～1300rpm up and down in the described easy degradation of fibers combing step;

C. two water jet pressure of first rotary drum of described water thorn combined shaping step are respectively 35bar, 80bar; The second rotary drum water jet pressure is 0; Two water jet pressure of the 3rd rotary drum are respectively 110bar, 130bar; Two water jet pressure of the 4th rotary drum are respectively 70bar, 0;

D. the sucktion fan efficient of described baking step is respectively 80%, 80%, 65%, three circulating fans and exhaust fan efficient are 60% in the dryer, oven temperature is 115 ℃.