CN111619184A - Production method of sanitary material - Google Patents
Production method of sanitary material Download PDFInfo
- Publication number
- CN111619184A CN111619184A CN202010343677.0A CN202010343677A CN111619184A CN 111619184 A CN111619184 A CN 111619184A CN 202010343677 A CN202010343677 A CN 202010343677A CN 111619184 A CN111619184 A CN 111619184A
- Authority
- CN
- China
- Prior art keywords
- elastic film
- core
- sanitary material
- film
- core elastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B2037/0092—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding in which absence of adhesives is explicitly presented as an advantage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
Abstract
A method for producing a sanitary material comprises a core elastic film layer with adhesiveness and non-woven fabric layers respectively covering the upper and lower parts of the core elastic film layer, and comprises the following steps: a) mixing, namely mixing the raw materials according to a certain weight part ratio to form a core elastic film layer mixture; b) forming a film, namely performing tape casting on a core film layer mixture and extruding a film to form a core elastic film with self-adhesive property, and performing online lamination; c) pre-activating, namely respectively activating the two non-woven fabrics into two activated non-woven fabrics to be combined online; d) combining, wherein two pieces of activated non-woven fabrics are respectively directly combined with the outer layer of the elastic film of the core body to form an elastic composite layer object, and the elastic composite layer object has transverse stretching degree; e) and curing, namely curing the elastic composite layer into the sanitary material with longitudinal rigidity. The production method of the invention has no glue adding process, and the finished product is a glue-free sanitary material, thus being safer, more environment-friendly and more reliable.
Description
Technical Field
The invention relates to a method for producing sanitary materials, in particular to a method for producing sanitary materials compounded by non-woven fabrics and elastic films.
Background
Most of elastic non-woven fabrics as the sanitary material in the present stage are formed by laminating non-woven fabrics and elastic single films through glue, the common elastic single films are single films which cannot be directly used without adhesive property, the single films are used after being coated with cloth, the glue is sprayed or combined through glue layers in the post-processing compounding process, the process is complicated, and products cannot be produced in line production. The sanitary material is often in direct contact with the skin of a human body, is easy to glue to change under the influence of body temperature, permeates into the skin, even influences the health of the human body, is not beneficial to the environmental protection and sanitation of the product, and has poor handfeel and softness. If the glue quality is poor, phenomena such as degumming and layering, uneven coating distribution and the like are easy to form, and the product quality is influenced.
Disclosure of Invention
The invention aims to provide a method for producing sanitary wares, which can be produced in one-line production and can be directly produced aiming at the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for producing a sanitary material comprises a core elastic film layer with adhesiveness and non-woven fabric layers respectively covering the upper and lower parts of the core elastic film layer, and comprises the following steps:
a) mixing, namely mixing the raw materials according to a certain weight part ratio to form a core elastic film layer mixture;
b) forming a film, namely performing tape casting on a core film layer mixture and extruding a film to form a core elastic film with self-adhesive property, and performing online lamination;
c) pre-activating, namely respectively activating the two non-woven fabrics into two activated non-woven fabrics to be combined online;
d) combining, wherein two pieces of activated non-woven fabrics are respectively directly combined with the outer layer of the elastic film of the core body to form an elastic composite layer object, and the elastic composite layer object has transverse stretching degree;
e) and curing, namely curing the elastic composite layer into the sanitary material with longitudinal rigidity.
As an optimization: the curing is groove hot-pressing curing or point-pressing banding curing.
As an optimization: the raw material in the step a) comprises 50 to 95 weight percent of symmetrical styrene-diene-triblock copolymer or asymmetrical styrene-diene-triblock copolymer serving as a first polymer substance A and 5 to 45 weight percent of olefin-based elastomer serving as a second polymer substance B.
As an optimization: the core elastic film has longitudinal and transverse stretching degrees.
As an optimization: in the step a), after the core elastic film is formed, the core elastic film is perforated.
Compared with the prior art, the invention has the advantages that:
1. the invention relates to a method for producing sanitary materials by one-line flow process and direct product production, which has no intermediate semi-finished product transferring and reprocessing process, high production efficiency and low cost. Better than the similar products in the market in economy
2. The core elastic film has viscosity, is directly combined with the non-woven fabric in a compounding way, does not need a glue adding process, and is safer, more environment-friendly and more reliable because a finished product is a glue-free sanitary material.
3. The rigidity treatment in the MD direction adopts mechanical curing processing, namely, in the MD direction, the mechanical curing is adopted and the non-woven fabric with stronger longitudinal rigidity is combined, so that the rigidity in the MD direction on the whole composite finished product is enough, the processing and the utilization of the disposable sanitary ware are facilitated, the requirement of considering the rigidity in the MD direction on a film to be formed is not needed, and the cost is greatly saved. Without affecting the extensibility of the elastic film composite in the CD direction. And the glue is not needed to be applied to the non-woven fabric or the elastic to-be-formed film, so that the defects that the elastic single film is insufficient in rigidity in the MD direction and is not beneficial to the processing of disposable sanitary ware are effectively overcome in a more economical and environment-friendly mode.
Detailed Description
The invention discloses an embodiment of a method for producing a sanitary material, which comprises a core elastic film layer with adhesiveness and non-woven fabric layers respectively covering the upper part and the lower part of the core elastic film layer, and comprises the following specific steps:
a) mixing, namely mixing raw materials according to a certain weight part ratio to form a core elastic film layer mixture, wherein the raw materials comprise 50-95 wt% of a symmetrical styrene-diene-triblock copolymer or an asymmetrical styrene-diene-triblock copolymer serving as a first polymer substance A and 5-45 wt% of an olefin-based elastomer serving as a second polymer substance B; the second polymer B olefin-based elastomer adopts the Widamei 6102FL, has good permeability, can be well fused with the first polymer A, and leads the core elastic film to have good self-adhesiveness, namely excellent adhesive force. Meanwhile, the second polymer substance B enables the core elastic membrane to have good bearing capacity and high-quality pushing performance, the membrane forming efficiency is high, and the production efficiency can be greatly improved. The raw materials can also comprise an additional component C, namely polypropylene resin PP, and in the preferred scheme, the polypropylene resin with stronger plasticizing effect and strong toughness is added to form a layer of coating on the surface of the first polymer substance A, so that the rigidity of the foam-shaped first polymer substance A is enhanced, and the deformation rate of the elastic film of the core body is further reduced, and can be reduced to below 5% from the original deformation rate of below 10%. If necessary, an additional component C of Enen Baobenbable series metallocene polyethylene resin mPE can be added, and the addition of the metallocene polyethylene resin can improve the tear resistance of the film per se, improve the ageing resistance by one time and has excellent performance in a drop weight test.
b) Film forming, namely performing core film layer mixture tape casting-film extrusion to form a core elastic film with self-adhesive property, wherein the core elastic film has longitudinal and transverse stretching degrees and is to be laminated on line; the core elastic film may be apertured during this step if desired to enhance breathability.
c) Pre-activating, namely, respectively activating the two non-woven fabrics in the CD direction through gear rolls to form two activated non-woven fabrics, and waiting for combination on line, wherein the embodiment adopts transverse gear (IMG) activation, and can also adopt any conventional transverse activation method.
d) And (3) combining, namely directly combining the two activated non-woven fabrics with the outer layer of the elastic film of the core body respectively to form an elastic composite layer, wherein the elastic composite layer has transverse stretching degree.
e) And curing, namely curing the elastic composite layer to form a sanitary material with longitudinal rigidity, wherein in the embodiment, groove hot-pressing curing is adopted, and the MD rigidity treatment can be realized by point-pressing strip-shaped curing. The rigidity treatment in the MD direction adopts mechanical curing processing, namely, in the MD direction, the mechanical curing is adopted and the non-woven fabric with stronger longitudinal rigidity is combined, so that the rigidity in the MD direction on the whole composite finished product is enough, the processing and the utilization of the disposable sanitary ware are facilitated, the requirement of considering the rigidity in the MD direction on a film to be formed is not needed, and the cost is greatly saved. Without affecting the extensibility of the elastic film composite in the CD direction. And the glue is not needed to be applied to the non-woven fabric or the elastic to-be-formed film, so that the defects that the elastic single film is insufficient in rigidity in the MD direction and is not beneficial to the processing of disposable sanitary ware are effectively overcome in a more economical and environment-friendly mode.
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, and various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (9)
1. A production method of a sanitary material is characterized by comprising the following steps: the sanitary material comprises a core elastic film layer with adhesiveness and non-woven fabric layers respectively covering the upper part and the lower part of the core elastic film layer, and the sanitary material comprises the following specific steps:
a) mixing, namely mixing the raw materials according to a certain weight part ratio to form a core elastic film layer mixture;
b) forming a film, namely performing tape casting on a core film layer mixture and extruding a film to form a core elastic film with self-adhesive property, and performing online lamination;
c) pre-activating, namely respectively activating the two non-woven fabrics into two activated non-woven fabrics to be combined online;
d) combining, wherein two pieces of activated non-woven fabrics are respectively directly combined with the outer layer of the elastic film of the core body to form an elastic composite layer object, and the elastic composite layer object has transverse stretching degree;
e) and curing, namely curing the elastic composite layer into the sanitary material with longitudinal rigidity.
2. A method of producing a sanitary material according to claim 1, wherein: the curing is groove hot-pressing curing or point-pressing banding curing.
3. A method of producing a sanitary material according to claim 1 or 2, wherein: the raw material in the step a) comprises 50-95 wt% of symmetrical styrene-diene-triblock copolymer or asymmetrical styrene-diene-triblock copolymer serving as a first polymer substance A and 5-45 wt% of olefin-based elastomer serving as a second polymer substance B.
4. A method of producing a sanitary material according to claim 1 or 2, wherein: the core elastic film has longitudinal and transverse stretching degrees.
5. A method of producing a sanitary material according to claim 3, wherein: the core elastic film has longitudinal and transverse stretching degrees.
6. A method of producing a sanitary material according to claim 1 or 2, wherein: in the step a), after the core elastic film is formed, the core elastic film is perforated.
7. A method of producing a sanitary material according to claim 3, wherein: in the step a), after the core elastic film is formed, the core elastic film is perforated.
8. A method of producing a sanitary material according to claim 4, wherein: in the step a), after the core elastic film is formed, the core elastic film is perforated.
9. A method of producing a sanitary material according to claim 5, wherein: in the step a), after the core elastic film is formed, the core elastic film is perforated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343677.0A CN111619184A (en) | 2020-04-27 | 2020-04-27 | Production method of sanitary material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343677.0A CN111619184A (en) | 2020-04-27 | 2020-04-27 | Production method of sanitary material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111619184A true CN111619184A (en) | 2020-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010343677.0A Pending CN111619184A (en) | 2020-04-27 | 2020-04-27 | Production method of sanitary material |
Country Status (1)
| Country | Link |
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| CN (1) | CN111619184A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1950555A (en) * | 2004-04-30 | 2007-04-18 | 金伯利-克拉克环球有限公司 | Multi-capable elastic laminate process |
| CN102371741A (en) * | 2010-08-19 | 2012-03-14 | 郑元隆 | Air-permeable elastic laminated composition and manufacturing method thereof |
-
2020
- 2020-04-27 CN CN202010343677.0A patent/CN111619184A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1950555A (en) * | 2004-04-30 | 2007-04-18 | 金伯利-克拉克环球有限公司 | Multi-capable elastic laminate process |
| CN102371741A (en) * | 2010-08-19 | 2012-03-14 | 郑元隆 | Air-permeable elastic laminated composition and manufacturing method thereof |
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