CN100515763C - Method for producing composite punched membrane - Google Patents

Abstract

A process of the compound punching film is disclosed in the invention. It uses the thermo resin particle as the material, the non-woven fabrics as the hydrophilic material. The resin particle is extruded by the tape casting machine, at the same time the non-woven fabrics is feed by the leading roller, so the casting film binds with the non-woven cloth and passes a roller web cage with the web hole to form the hole shape in the compound film by the suction pressure generated by the vacuum suction mouth, last the solidified film is transferred to the post treatment equipment. The invention has the simple process, high efficient and good quality and solved the problem of the irritability and itch created by the thermosol.

Description

The production method of composite punched membrane

Technical field

The present invention relates to sanltary towel, panty liner, adult and lose use in the amenities such as flap trousers, baby diaper a kind of and have and absorb human body and discharge the composite punched membrane of liquid (also claiming " composite sanitary upper material "), this composite punched membrane generally is composited by perforating film layer and nonwoven moisture absorption layer.Be particularly related to the production method of this composite punched membrane.

Background technology

Composite punched membrane (also claim " sanitary upper material ") loses amenities such as flap trousers, baby diaper as sanltary towel, panty liner, adult basic lining uses in absorbent commodities such as in the past sanitary napkin, disposable diaper, urine pad, short underpants liner in a large number.This lining generally is composited by perforating film layer and nonwoven moisture absorption layer, and liquid is had permeability and absorbability fast.Chinese patent discloses a name on May 8th, 2002 and has been called " production technology of composite sanitary upper material and products thereof ", and the applying date is September 29 calendar year 2001, and application number is 01141629.7 application for a patent for invention.The production method of the composite sanitary upper material of its record is as follows: elder generation is with the feeding of PE film and adopt the gas heating, the PE film that heated is carried out vacuum inhale the hole on the cylinder mould of special use, surface with nonwoven sprays PUR again, the nonwoven that glue was sprayed is inhaled PE film behind the hole with vacuum and is carried out compoundly then, finishes the compound production of sanitary upper material through rolling after cooling.According to said method the composite sanitary upper material of Sheng Chaning has hydrophobic layer and hydrophilic layer, and is provided with uniform micropore on hydrophobic layer.This scheme has been broken the traditional manufacturing technique that PE film in the past adopts mechanical punching, adopts and carry out the technology that vacuum is inhaled the hole on cylinder mould, and with PUR nonwoven and PE film are carried out compoundly, has obtained positive effect.But this production method still has the following disadvantages: 1, because the existence of PUR is being subjected under wet and the body temperature effect, and chemical change takes place for it, make human body skin produce uncomfortable sensation such as allergy, itch; 2, one of this method raw material uses is the promoting the circulation of qi body heating of going forward side by side of PE film, and from whole process of production, the first step need be produced the PE film, second step was produced composite sanitary upper material with this PE film again, wherein, the production of PE film and composite sanitary upper material production need twice heating, so both be unfavorable for energy savings, increased production link again, thereby made whole process of production become complicated, and efficient is low, the cost height is unfavorable for large-scale industrialization production.

Summary of the invention

The angle that the present invention produces from large-scale industrialization proposes a kind of production method of composite punched membrane, its objective is will simplify technology, raise the efficiency, and solves simultaneously in the past because of sense of discomfort problems such as the allergy of using PUR to bring, itch.

For achieving the above object, the technical solution used in the present invention is: a kind of production method of composite punched membrane,, as the hydrophilic layer lining, produce by the following method as raw material hydrophilic or the hydrophobic layer making hole film with the hot-melt resin particle with nonwoven:

The hot-melt resin particle is extruded by casting machine high temperature, flowed out the casting films of high temperature fused state from the T shape die head of casting machine; Simultaneously, with nonwoven from emptying roller through the deflector roll feeding; Allow casting films that is in high temperature fused state and the nonwoven of sending here fit then, and roll the cylinder type cylinder mould that pile warp is crossed a uniform mesh in surface, wherein, casting films is positioned at the inboard, and be close to cylinder surface, nonwoven is positioned at the outside and is close to casting films, at this moment, fusion high temperature by casting films is adhered to nonwoven on the casting films, meanwhile, the vacuum slot that is located at cylinder inside produces the high strength negative pressure from medial surface to mesh, and the vacuum of negative pressure forces composite membrane to break and forms and the corresponding hole shape of mesh at-0.5 ± 0.2 atmospheric pressure, simultaneously, swabbing action makes composite membrane be cooled to solid state rapidly in moment, and after deflector roll is sent to equipment for after-treatment, final rolling is a finished product; The linear velocity that the linear velocity of described rolling＞cylinder type cylinder mould is rolled, greater than amount be controlled at cylinder type cylinder mould rolling wire speed 10% in, the blowing of nonwoven and feeding deflector roll are driven roll.

Related content in the technique scheme is explained as follows: described hot-melt resin particle adopts PE material, PP material or both mixing; Described nonwoven adopts hot melt nonwoven or cotton nonwoven, and wherein, the hot melt nonwoven adopts PE material, PP material or both mixing.

Because the technique scheme utilization, the present invention compared with prior art has following advantage and effect:

1, the present invention has broken that traditional handicraft is used PUR and sense of discomfort problems such as the allergy brought, itch, the chemical contamination of having avoided adhesive material that health product is brought.When composite punched membrane used, the upper strata nonwoven contacted with human body skin, more feels dry and comfortable, soft, and tactility is better, and lower floor's making hole film promptly has speed and oozes the human body fluid function and also have good reverse-osmosis-prevention effect simultaneously.Compared with prior art, have more outstanding substantive distinguishing features and obvious improvement.

2, the present invention directly makes up original PE film production process with the composite punched membrane production technology, had not only saved originally the PE film is heated link twice, has saved the energy, and whole process of production is become simply, and the efficient height, cost is low, quality is good, helps large-scale industrialization production.

3, the present invention utilizes two kinds of dissimilar material properties, by the fusion high temperature of casting films nonwoven is adhered on the casting films, and not only the two layers of material bonding is reliable, and fits evenly, does not crease easily.

4, the present invention once heats composite molding owing to the PE film, and is better with the intensity that thermoplastic is compared in twice heating composite molding in the past.

Description of drawings

Accompanying drawing 1 is a composite punched membrane embodiment production technology sketch.

In the above accompanying drawing: 1, casting machine; 2, casting films; 3, nonwoven; 4, cylinder type cylinder mould; 5, vacuum slot; 6, emptying roller; 7, wind-up roll; 8, carving knife; 9, deflector roll; 10, deflector roll; 11, deflector roll; 12, deflector roll; 13, composite punched membrane; 14, deflector roll; 15, deflector roll; 16, deflector roll.

The specific embodiment

Below in conjunction with drawings and Examples the present invention is further described:

Embodiment: shown in accompanying drawing 1, a kind of production method of composite punched membrane, its content is:

One, raw material

As raw material hydrophilic or the hydrophobic layer making hole film, as the hydrophilic layer lining, described hot-melt resin particle adopts PE material, PP material or both mixing with nonwoven with the hot-melt resin particle; Described nonwoven adopts hot melt nonwoven or cotton nonwoven, and wherein, nonwoven adopts PE material, PP material or both mixing.

Two, production technology

Below with the PE particle as raw material hydrophilic or the hydrophobic layer making hole film, as the hydrophilic layer lining, it is as follows to describe production technology with the hot melt nonwoven:

The hot-melt resin particle is extruded by casting machine 1 high temperature, flowed out the casting films 2 of high temperature fused state from the T shape die head of casting machine 1; Simultaneously, with nonwoven 3 from emptying roller 6 successively through deflector roll 12, deflector roll 11, deflector roll 10 and deflector roll 9 feedings, emptying roller 6 and deflector roll 12～deflector roll 9 adopts driven rolls.Allow casting films 2 that is in high temperature fused state and the nonwoven of sending here 3 near fitting then, and roll the cylinder type cylinder mould 4 that pile warp is crossed a uniform mesh in surface, wherein, casting films 2 is positioned at the inboard, and be close to cylinder surface, nonwoven 3 is positioned at the outside and is close to casting films 2, at this moment, fusion high temperature by casting films 2 is adhered to nonwoven 3 on the casting films 2, meanwhile, the vacuum slot 5 that is located at cylinder inside produces the high strength negative pressure from medial surface to mesh, and the vacuum of negative pressure is at-0.5 ± 0.2 atmospheric pressure, forcing composite membrane to break forms and the corresponding hole shape of mesh, simultaneously, swabbing action makes composite membrane be cooled to solid state rapidly in moment, after deflector roll 14 is sent to cutting device (by carving knife 8, deflector roll 15, form with deflector roll 16, see Fig. 1), be finished product finally through wind-up roll 7 rollings.The linear velocity of described rolling＞cylinder type cylinder mould rolling wire speed 10% in.The composite punched membrane of Sheng Chaning can be used to make sanltary towel, panty liner, adult and loses amenities such as flap trousers, baby diaper in this way.

The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit essence is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (2)

1, a kind of production method of composite punched membrane is characterized in that:, as the hydrophilic layer lining, produce by the following method with nonwoven as raw material hydrophilic or the hydrophobic layer making hole film with the hot-melt resin particle:

The hot-melt resin particle is extruded by casting machine high temperature, flowed out the casting films of high temperature fused state from the T shape die head of casting machine; Simultaneously, with nonwoven from emptying roller through the deflector roll feeding; Allow casting films that is in high temperature fused state and the nonwoven of sending here fit then, and roll the cylinder type cylinder mould that pile warp is crossed a uniform mesh in surface, wherein, casting films is positioned at the inboard, and be close to cylinder surface, nonwoven is positioned at the outside and is close to casting films, at this moment, fusion high temperature by casting films is adhered to nonwoven on the casting films, meanwhile, the vacuum slot that is located at cylinder inside produces the high strength negative pressure from medial surface to mesh, and the vacuum of negative pressure forces composite membrane to break and forms and the corresponding hole shape of mesh at-0.5 ± 0.2 atmospheric pressure, simultaneously, swabbing action makes composite membrane be cooled to solid state rapidly in moment, and after deflector roll is sent to equipment for after-treatment, final rolling is a finished product; The linear velocity that the linear velocity of described rolling＞cylinder type cylinder mould is rolled, greater than amount be controlled at cylinder type cylinder mould rolling wire speed 10% in, the blowing of nonwoven and feeding deflector roll are driven roll.

2, the production method of composite punched membrane according to claim 1 is characterized in that: described hot-melt resin particle adopts PE material, PP material or both mixing; Described nonwoven adopts hot melt nonwoven or cotton nonwoven, and wherein, the hot melt nonwoven adopts PE material, PP material or both mixing.