CN100482720C - Air-permeable film with surface delustering and paper texture and its preparation process - Google Patents
Air-permeable film with surface delustering and paper texture and its preparation process Download PDFInfo
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- CN100482720C CN100482720C CNB2005101005179A CN200510100517A CN100482720C CN 100482720 C CN100482720 C CN 100482720C CN B2005101005179 A CNB2005101005179 A CN B2005101005179A CN 200510100517 A CN200510100517 A CN 200510100517A CN 100482720 C CN100482720 C CN 100482720C
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Abstract
The invention discloses a water-proof porous poromeric film and preparing method, which is characterized by the following: setting the weight rate of polyolefin resin and inorganic filler at 1: 0.5-1.5 in the poromeric film; weighing the film at 10-70g/m2 with extinction surface and paper sense; adopting micro-pressing disposal to combine two-segment one-way extending or multi-segment one-way extending method.
Description
Technical field
The present invention relates to a kind of air permeable polyolefin film and preparation method thereof, more particularly, the present invention relates to a kind of surface dulling and have polyethylene air-permeating film of paper texture and preparation method thereof.
Background technology
Air-permeating film be a kind of can allow gas permeation but can liquid barrier the film that sees through of water for example.This film is widely used in sanitary product aspects such as sanitary pad, baby diaper, adult-incontinence articles, hemostasis subsides and operation disposable garment.
In order to reach gas-pervious purpose, air-permeating film is designed and manufactured into the unique plastics film with multi-cellular structure, and from the square section of film, many diameters that then distributing have only 1～2 micron fine aperture.Like this, the gas as air and/or water vapor be easy to see through these apertures from damp and hot environment to exosmosis, and outside fresh air constantly sees through these aperture endosmosises, thereby reaches the metathetical purpose, makes film have the function of breathing; And on the other hand, the liquid as the liquid water is intercepted owing to capillary effect but is difficult to infiltration, thereby makes this air-permeating film possess ventilated and characteristic waterproof.
The present technological method of producing air-permeating film has multiple, wherein mainly contains two kinds of blown film method and casting and stretching methods.Can be divided into unilateral stretching method, two-way stretch method and local stretching method again by the drawing process difference.Wherein, the product width handiness that the blown film method is produced is higher, and adaptability to raw material is better, the physical and mechanical properties of product is better, and cost is less, but because this method is to belong to stretch processes, cause the Air permenbility adjusting of air-permeating film to be difficult to control, the feel of air-permeating film is not ideal enough; Curtain coating+two-way stretch method cost is higher, and health need not too high physicals with air-permeating film, and homogeneity is also relatively poor relatively; Curtain coating+local elongation method is suitable with the blown film method, and the product thickness uniformity coefficient is not good, and film surface is prone to lines, and production process is easy to generate the phenomenon of " wafing ".
Chinese patent 87104852 discloses a kind of air-permeating film and manufacture method thereof, the resinous composition of its air-permeating film, this resin combination comprises: (1) 100 part of (weight) density is 0.870 to 0.915 gram/cubic centimetre and the type low density polyethylene resin that contains 15 to 50% (weight) certain component, said components is at room temperature extractible with dimethylbenzene, and the weight average molecular chain length is 1000 to 9000 dusts; (1) 50 to 400 parts of (weight) fillers; And selectable (3) 0.5 to 8 parts of (weight) nonionic surface active agent.The resin combination of this patent under 30 to 80 ℃ of temperature longitudinally uniaxial extension 1.2-8 doubly make and a kind ofly have than highly air-permeable, the better air-permeating film of sense of touch and higher-strength.
Chinese patent 99123458 discloses composition and this film-forming method that is used for high working property and infiltrative air-permeating film.The composition of this patent comprises: 30-100 weight part range of molecular weight distributions is the type low density polyethylene resin of 5-20; 1-100 weight part acrylic resin; 1-30 parts by weight of ethylene-propylene copolymer; 1-30 weight part melt flow index is 12 or higher polyolefin resin; With the 50-200 weight part mineral filler that by total amount of resin is 100 weight parts.It can make a kind of air-permeating film that high tensile is arranged through 1.5-3 times of uniaxial extensions.
Though above-mentioned these Technologies can improve the tensile strength and the molding performance of film, behind the stretched cooling and shaping of film, the plastics film surface reflection, outward appearance is given a kind of airtight sensation of people, and papering effect is poor.In addition, because film takes one-part form to stretch, distance is far away between two draw rolls, and the constriction amount of film is big, and the thickness evenness of film is bad; One-part form tensile multiplying power regulation range can not be too big, otherwise can film and draw roll between relative movement, make the stretching of film inhomogeneous, thereby cause the film ununiformity of breathing freely; One-part form stretches because none stretching buffered process makes in the film course of processing and easily tears.
Summary of the invention
It is lackluster and have air-permeating film of paper texture and preparation method thereof to the purpose of this invention is to provide a kind of surface.
In order to realize above-mentioned purpose of the present invention, on the one hand, the invention provides air-permeating film a kind of waterproof, that have multi-cellular structure, this air-permeating film comprises the mineral filler of polyolefin resin and high filler loading capacity, wherein, the weight ratio of polyolefin resin and mineral filler is 1:0.5-1.5 in the air-permeating film, is preferably 1:0.7-1.3, more preferably 1:0.8-1.2; The basic weight of this air-permeating film is 10-70g/m
2, be preferably 20-60g/m
2, 25-50g/m more preferably
2And, the surface dulling of this air-permeating film, promptly it is lackluster substantially, or the basic no-reflection phenomenon in its surface; Simultaneously, this air-permeating film has the texture of paper, or has the effect of paperyization.
Further, the vapor transfer rate of above-mentioned air-permeating film is 500-5000g/m
224h is preferably 800-3000g/m
224h, more preferably 1000-2500g/m
224h.
In the air-permeating film of the present invention, polyolefin resin can be preferably polyethylene for polyethylene, polypropylene, ethylene-propylene copolymer or its mixture; Mineral filler is chalk, lime carbonate and/or acidifying lime carbonate etc., is preferably acidifying lime carbonate; Certainly, can also comprise the auxiliary agent that various processing of polyolefins resin films are fit in the air-permeating film of the present invention, promptly various additives are as siccative, oxidation inhibitor, static inhibitor and/or processing aid.
And in order to reach the effect of surface dulling and paperyization, inventor of the present invention thinks that through careful analysis and research and investigation curtain coating+two step unilateral stretching methods can realize above-mentioned purpose.The effect with paperyization of Zhi Bei air-permeating film by this method, film has good homogeneous, ventilation property and tensile strength simultaneously.
Therefore, the present invention also provides a kind of method for preparing surface dulling and have the air-permeating film of paper texture, and this method comprises the step of following order:
(1) extrudes under the mixture high temperature with polyolefin resin, mineral filler and other additive, form the fused hybrid resin;
(2) above-mentioned hybrid resin film is cooled off film forming, and exert pressure immediately, carry out minute-pressure and handle, obtain thick film;
(3), obtain film with above-mentioned thick film preheating and carry out unilateral stretching; And
(4) above-mentioned film is carried out heat setting type, cooling and shaping more earlier.
In the above-mentioned method, under the temperature that resin compound can be certain in the step (1), under 140 ℃-260 ℃, preferred 180 ℃-240 ℃, behind the extruder screw fusion plastification, extrude through T-pattern head, form the fused hybrid resin, the temperature of this fused hybrid resin can be 210 ℃-240 ℃.
In the step (2), fused hybrid resin film forms thick film through the slab roller cooling of 20 ℃-30 ℃ of low temperature such as temperature.Carry out minute-pressure immediately and handle after forming this thick film, promptly by a silica gel roller thick film is exerted pressure, thickness is close on the casting sheet machine frosted roll, silica gel roller is in low-temperature condition, is 18 ℃-30 ℃ as its temperature, and it is 3.0-6.5kgf/cm that institute's applied pressure is handled in minute-pressure
2, purpose is to make film have the outward appearance and the more crystalline effect of paper texture.
In the step (3), the thick film of handling through overcooling and minute-pressure can be after preheating under 60 ℃ of-80 ℃ of temperature carries out two-section type unilateral stretching or multi-stage type unilateral stretching if adopt the two-section type unilateral stretching along the mechanical workout direction, then the temperature of first drawing zone can be 60 ℃-75 ℃, and draw ratio is 1.5-1.7; The second drawing zone temperature can be 68 ℃-78 ℃, and draw ratio is 1.0-1.3.
In the step (4), the film after the stretching can be to carry out heat setting type under 68 ℃ of-92 ℃ of conditions in temperature, again cooling and shaping.
Minute-pressure multi-stage type unilateral stretching method of the present invention and one section worker's formula stretch to, and the course of processing is more stable, and stretch ratio is regulated and had more handiness.The outward appearance that has high ventilation property, tensile strength and paperyization with the air-permeating film of this minute-pressure multi-stage type unilateral stretching method preparation.This film has soft hand feeling as the fabric, and has good intensity.
The present invention is described in further detail below in conjunction with embodiment, but these concrete embodiments are not to be limitation of the present invention; Any improvement or change on these embodiments still belongs to spirit of the present invention and its protection domain.
Embodiment
Embodiment 1
Be transported to the forcing machine fusion plastification after will containing the mixture dehumidifying of 1 part in polyvinyl resin 100 parts (weight), acidifying lime carbonate 100 parts (weight), siccative, each Heating Zone Temperature of forcing machine is set at 180 ℃-240 ℃, molten resin is set at 230 ℃ T-pattern head through temperature and extrudes the formation molten resin film, resin molding is 25 ℃ slab roller surface chilling in temperature, form thick film, thick film is that 25 ℃ silica gel roller carries out the minute-pressure processing to film by temperature, and pressure is 4.0kgf/cm
2, will carry out the two-section type unilateral stretching along the mechanical workout direction after the preheating under 60 ℃ of-80 ℃ of temperature through the thick film that minute-pressure is handled, the first tensile district temperature is 70 ℃, draw ratio is 1.6.The second drawing zone temperature is 75 ℃, and draw ratio is 1.2.Film after the stretching is heat setting type under 68 ℃ of-92 ℃ of conditions in temperature, and cooling forms air-permeating film again.This air-permeating film does not have surface reflection, and has the texture of paper.Other product performance data are:
Basic weight (g/m
2) 35.2
Tensile strength (cN/25mm) MD/TD 1668/382
Elongation at break (%) MD/TD 256/416
Percent thermal shrinkage (%) MD 3.5
Vapor transfer rate (WVTR) (g/m
2.24h) 1645
Embodiment 2
Be transported to the forcing machine fusion plastification after will containing the mixture dehumidifying of 6 parts in polyvinyl resin 100 parts (weight), acidifying lime carbonate 70 parts (weight), static inhibitor, each Heating Zone Temperature of forcing machine is set at 180 ℃-220 ℃, molten resin is set at 230 ℃ T-pattern head through temperature and extrudes the formation molten resin film, resin molding is 20 ℃ slab roller surface chilling in temperature, form thick film, thick film is that 20 ℃ silica gel roller carries out the minute-pressure processing to film by temperature, and pressure is 4.5kgf/cm
2, will carry out the two-section type unilateral stretching along the mechanical workout direction after the preheating under 60 ℃ of-80 ℃ of temperature through the thick film that minute-pressure is handled, the first tensile district temperature is 65 ℃, draw ratio is 1.5.The second drawing zone temperature is 78 ℃, and draw ratio is 1.3.Film after the stretching is heat setting type under 80 ℃ of-90 ℃ of conditions in temperature, and cooling forms air-permeating film again.This air-permeating film does not have surface reflection, and has the texture of paper.Other product performance data are:
Basic weight (g/m
2) 30.5
Tensile strength (cN/25mm) MD/TD 1680/390
Elongation at break (%) MD/TD 260/420
Percent thermal shrinkage (%) MD 3.8
Vapor transfer rate (WVTR) (g/m
2.24h) 1800
Embodiment 3
Be transported to the forcing machine fusion plastification after will containing the mixture dehumidifying of polyvinyl resin 100 parts of (weight), acidifying lime carbonate 120 parts of (weight), 2 parts in static inhibitor, 1 part in siccative, each Heating Zone Temperature of forcing machine is set at 200 ℃-240 ℃, molten resin is set at 235 ℃ T-pattern head through temperature and extrudes the formation molten resin film, resin molding is 30 ℃ slab roller surface chilling in temperature, form thick film, thick film is that 30 ℃ silica gel roller carries out the minute-pressure processing to film by temperature, and pressure is 5.0kgf/cm
2, will carry out the two-section type unilateral stretching along the mechanical workout direction after the preheating under 60 ℃ of-80 ℃ of temperature through the thick film that minute-pressure is handled, the first tensile district temperature is 75 ℃, draw ratio is 1.6.The second drawing zone temperature is 68 ℃, and draw ratio is 1.1.Film after the stretching is heat setting type under 75 ℃ of-85 ℃ of conditions in temperature, and cooling forms air-permeating film again.This air-permeating film does not have surface reflection, and has the texture of paper.Other product performance data are:
Basic weight (g/m
2) 42.1
Tensile strength (cN/25mm) MD/TD 1600/370
Elongation at break (%) MD/TD 251/410
Percent thermal shrinkage (%) MD 3.4
Vapor transfer rate (WVTR) (g/m
2.24h) 1480
Claims (7)
1, air-permeating film a kind of waterproof, that have multi-cellular structure, this air-permeating film comprises the mineral filler of polyvinyl resin and high filler loading capacity, the weight ratio of polyvinyl resin and mineral filler is 1:0.5-1.5 in the described air-permeating film, and the basic weight of this air-permeating film is 10-70g/m
2, it is characterized in that described air-permeating film is that a kind of employing comprises the preparation of following method steps, surface dulling successively and has the air-permeating film of paper texture:
(1) mixture of polyvinyl resin, mineral filler and static inhibitor and/or siccative is extruded under 140 ℃-260 ℃ temperature, formed the fused hybrid resin;
(2) above-mentioned hybrid resin film is cooled off film forming, and apply 3.0-6.5kgf/cm immediately
2Pressure is handled, and obtains thick film;
(3), obtain film with above-mentioned thick film preheating and carry out unilateral stretching; And
(4) above-mentioned film is carried out heat setting type, cooling and shaping more earlier.
2, air-permeating film as claimed in claim 1 is characterized in that, the vapor transfer rate of described air-permeating film is 500-5000g/m
224h.
3, a kind of method for preparing surface dulling and have the air-permeating film of paper texture, this method comprises the step of following order:
(1) mixture of polyvinyl resin, mineral filler and static inhibitor and/or siccative is extruded under 140 ℃-260 ℃ temperature, formed the fused hybrid resin;
(2) above-mentioned hybrid resin film is cooled off film forming, and apply 3.0-6.5kgf/cm immediately
2Pressure is handled, and obtains thick film;
(3), obtain film with above-mentioned thick film preheating and carry out unilateral stretching; And
(4) above-mentioned film is carried out heat setting type, cooling and shaping more earlier.
4, method as claimed in claim 3 is characterized in that, the temperature in the step (1) is 180 ℃-240 ℃.
5, method as claimed in claim 3 is characterized in that, step (3) preheating temperature is 60-80 ℃, and described unilateral stretching is the two-section type unilateral stretching.
6, method as claimed in claim 5 is characterized in that, in the described two-section type unilateral stretching, the temperature of first drawing zone is 60 ℃-75 ℃, and draw ratio is 1.5-1.7; The temperature of second drawing zone is 68 ℃-78 ℃, and draw ratio is 1.0-1.3.
7, method as claimed in claim 3 is characterized in that, the temperature of heat setting type is 68-92 ℃ in the step (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101005179A CN100482720C (en) | 2005-10-21 | 2005-10-21 | Air-permeable film with surface delustering and paper texture and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101005179A CN100482720C (en) | 2005-10-21 | 2005-10-21 | Air-permeable film with surface delustering and paper texture and its preparation process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1951984A CN1951984A (en) | 2007-04-25 |
| CN100482720C true CN100482720C (en) | 2009-04-29 |
Family
ID=38058551
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101005179A Expired - Fee Related CN100482720C (en) | 2005-10-21 | 2005-10-21 | Air-permeable film with surface delustering and paper texture and its preparation process |
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| CN (1) | CN100482720C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589676A (en) * | 2014-11-28 | 2015-05-06 | 桐城市福润包装材料有限公司 | Production process of BOPP thin film |
| CN107513197B (en) * | 2016-06-18 | 2021-04-09 | 合肥杰事杰新材料股份有限公司 | Waterproof breathable cast film composite material and preparation method thereof |
| CN106397918B (en) * | 2016-09-07 | 2019-04-02 | 上海紫华企业有限公司 | A kind of high moisture-inhibiting polyolefin micropore ventilated membrane |
| CN110079001A (en) * | 2019-05-27 | 2019-08-02 | 佛山华韩卫生材料有限公司 | A kind of very thin high ventilative zero leakage counterdie of pro-skin |
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| Publication number | Publication date |
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| CN1951984A (en) | 2007-04-25 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Foshan China Korea Spro hygienic material Co., Ltd Assignor: Foshan Plastic Group Co., Ltd. Contract record no.: 2010440001136 Denomination of invention: Air-permeable film with surface delustering and paper texture and its preparation process Granted publication date: 20090429 License type: Exclusive License Open date: 20070425 Record date: 20100812 |
|
| C56 | Change in the name or address of the patentee |
Owner name: FOSHAN FSPG HI-TECH. SHARES CO., LTD. Free format text: FORMER NAME: FOSHAN PLASTIC GROUP CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 528000 No. 82 middle Fenjiang Road, Guangdong, Foshan Patentee after: FSPG Hi-Tech Co., Ltd. Address before: 528000 No. 82 middle Fenjiang Road, Guangdong, Foshan Patentee before: Foshan Plastic Group Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20181021 |
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| CF01 | Termination of patent right due to non-payment of annual fee |