CN113801365A - Method for manufacturing latex foaming bra pad - Google Patents
Method for manufacturing latex foaming bra pad Download PDFInfo
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- CN113801365A CN113801365A CN202111191177.0A CN202111191177A CN113801365A CN 113801365 A CN113801365 A CN 113801365A CN 202111191177 A CN202111191177 A CN 202111191177A CN 113801365 A CN113801365 A CN 113801365A
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- Prior art keywords
- foaming
- parts
- latex
- bra pad
- foaming material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/06—CO2, N2 or noble gases
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/05—Open cells, i.e. more than 50% of the pores are open
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2307/00—Characterised by the use of natural rubber
- C08J2307/02—Latex
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/06—Sulfur
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a method for manufacturing a latex foaming bra pad, which comprises the following steps: taking 100 parts of natural latex, 1-2 parts of foaming stabilizer, 2-3 parts of sulfur, 2-4 parts of zinc oxide and 2-2 parts of accelerator Mz1 in parts by weight, adding the materials into a foaming chamber of a foaming machine, pressing air with the volume 3-8 times of that of the natural latex, and stirring and mixing the materials to prepare a foaming material; injecting the foaming material into a mold, and vacuumizing to ensure that the foaming material is decompressed, expanded and filled in the mold; putting the mould into a refrigeration chamber for refrigeration, and then introducing carbon dioxide gas for 3-5 minutes, wherein the pressure of the introduced gas is greater than that of the foaming body; putting the mould into a plate press for heating and vulcanizing; and taking the bra pad out of the die, cleaning and drying to obtain the foamed bra pad. The invention does not contain harmful substances, is mite-proof and bacteriostatic, is light, soft, comfortable and healthy, is pressed with air with the volume of 3-8 times of that of natural latex, is stirred and mixed to prepare the foaming material, and has lighter weight, lower cost, better elasticity and better air permeability.
Description
Technical Field
The invention relates to the technical field of bra pad manufacturing, in particular to a manufacturing method of a latex foam bra pad.
Background
The inside of the bra is mostly provided with a liner which has the function of shaping breasts. Such a pad is required to have not only a certain strength to meet the shaping requirements but also good air permeability to meet the comfort requirements. However, the conventional sponge-made pad has difficulty in satisfying both of these requirements.
Therefore, the Chinese invention patent CN113004585A discloses a latex foaming process and a one-step formed latex bra cup pad, which comprises the steps of preparing latex raw materials according to a formula, uniformly stirring and pre-vulcanizing; injecting the latex mixture into a foaming machine, and foaming to obtain foamed latex; injecting the foam latex into a mould, vacuumizing and freezing; injecting carbon dioxide into the mold; heating the mould to form the foaming latex; opening the mould, taking out the latex, and cleaning by using ultrasonic hot water; and putting the washed latex into a drying box for drying. This scheme has reduced the chemistry in the middle of the latex through physical foaming and has remained to improve the homogeneity of latex foaming in-process, makeed latex goods have more elastic support effect and gas permeability, more be applicable to latex products such as latex brassiere use next to the shin. However, in this scheme, during the foaming process, carbon dioxide gas is injected into the latex, and large bubbles are formed in the latex by stirring; then constantly improve the rotational speed of foaming machine to through the more little granular carbon dioxide bubble of foaming injection, the stirring process of frothing, high rotational speed is broken up big bubble and is formed the foaming of tiny particle shape, thereby forms stable even tiny bubble structure, and the technology of frothing is comparatively complicated, and because the inside bubble of foaming is even, the gas permeability remains to be further improved.
In view of the above, there is a need to improve the existing method for making latex foam bra pad to simplify the making process and improve the air permeability and supporting strength of latex foam bra pad.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a method for manufacturing a latex-foamable bra pad, so as to solve the problems of the prior art that the foaming process of the latex foam is complicated and the air permeability needs to be further improved.
Therefore, the manufacturing method of the latex foaming bra pad provided by the invention comprises the following steps:
taking 100 parts of natural latex, 1-2 parts of foaming stabilizer, 2-3 parts of sulfur, 2-4 parts of zinc oxide and 2-2 parts of accelerator Mz1 according to parts by weight, adding the materials into a foaming chamber of a foaming machine, simultaneously pressing air with the volume of 3-8 times of that of the natural latex, stirring and mixing to prepare a foaming material;
injecting the foaming material into a mold, and vacuumizing to ensure that the foaming material is decompressed, expanded and filled in the mold;
putting the mould into a refrigeration chamber for refrigeration for 10-20 minutes, and then introducing carbon dioxide gas for keeping for 3-5 minutes, wherein the pressure of the introduced carbon dioxide gas is 0.1-0.5 Mpa;
putting the mould into a plate press for heating and vulcanizing;
and taking the bra pad out of the die, cleaning and drying to obtain the foamed bra pad.
In the above technical solution, preferably, the air flow meter controls the air to be pressed in 3 to 8 times the volume of the natural rubber latex.
In the above technical solution, preferably, the freezing temperature is-25 to-40 degrees.
In the above technical solution, preferably, the injected foaming material is 40% -60% of the volume of the mold.
In the above technical solution, preferably, the drying is performed in an oven at a temperature of 70 ℃ for 3 hours while the moisture is removed.
According to the technical scheme, the manufacturing method of the latex foaming bra pad solves the problems that the foaming process of the latex foam in the prior art is complex, and the air permeability needs to be further improved.
Compared with the prior art, the invention has the following beneficial effects:
air with the volume 3-8 times of that of the natural latex is pressed in, the foaming material is prepared by stirring and mixing, and the foaming material is vacuumized to be decompressed and expanded to be foamed for the second time to fill the die, so that the weight is lighter and the cost is lower; and carbon dioxide gas is introduced after freezing, so that the wall of the bubble hole in the foaming body is broken to form a full-open-hole structure, and the foaming body has better elasticity and better air permeability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart of a method for manufacturing a latex foam bra pad according to the present invention;
FIG. 2 is an electron microscope 1000-fold magnification of the latex foam bra pad obtained by the method of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The realization principle of the invention is as follows:
pressing air with the volume 3-8 times of that of the natural latex, stirring and mixing to obtain a foaming material, vacuumizing to ensure that the foaming material is decompressed and expanded to fill a mold, introducing carbon dioxide gas after freezing to ensure that the inner hole wall of the foaming body is broken to form a full-open-hole structure, heating and vulcanizing, and cleaning and drying.
According to the scheme provided by the invention, the foam is frozen into an ice cream shape by freezing, the foam holes are different in size and have certain strength, when carbon dioxide gas is introduced, the hole wall is broken to form a full-open-hole structure due to the fact that the gas pressure is greater than the pressure of the foaming body, the foam holes are communicated with the gas holes, and the ice cream has more excellent air permeability, high elasticity, durability and strong support property.
In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.
It should be noted that the terms of orientation such as "inside, outside", "front, back" and "left and right" are used herein as reference objects, and it is obvious that the use of the corresponding terms of orientation does not limit the scope of protection of the present invention.
Referring to fig. 1, fig. 1 is a flow chart of a method for manufacturing a latex foam bra pad according to the present invention.
As shown in figure 1, the manufacturing method of the latex foaming bra pad provided by the invention comprises the following steps:
and step 110, taking 100 parts of natural latex, 1-2 parts of foaming stabilizer, 2-3 parts of sulfur, 2-4 parts of zinc oxide and 2-2 parts of accelerator Mz1 in parts by weight, putting the raw materials into a storage tank, mixing, pumping into a foaming chamber of a foaming machine through a metering pump, simultaneously pressing air with the volume 3-8 times of that of the natural latex, and stirring and mixing to prepare the foaming material.
In the scheme of the application, air which is 3 to 8 times of the volume of the natural latex is pressed in through the control of the air flow meter, and the natural latex is stirred and mixed at a low speed. The stirring speed is 50-100 r/min, and bubbles with different sizes are formed in the foaming body.
And 120, injecting the foaming material into a mold, and vacuumizing the mold to ensure that the foaming material is decompressed and expanded to fill the mold.
In the step, the injected foaming material is injected into 40-60% of the volume of the mould instead of filling the whole inner cavity of the mould, and during vacuumizing, the foaming material is decompressed and expanded to form secondary foaming to fill the mould, so that the foaming material has more air holes, and the weight of a finished product is lighter.
And step 130, placing the mould into a refrigerating chamber for freezing for 10-20 minutes at the freezing temperature of minus 25 to minus 40 ℃ to cool the foaming body into an ice cream shape with certain strength, then introducing carbon dioxide gas for keeping for 3-5 minutes, wherein the pressure of the introduced carbon dioxide gas is 0.1-0.5Mpa which is greater than the internal pressure of the foaming body, so that the wall of the air bubble in the foaming body is broken to form a full-open-hole structure, and the holes are communicated with each other. In particular, the large air cell wall thickness is smaller than the small air cell, and therefore, a larger void can be formed. The air permeability is greatly improved, and the foaming material can be gelled by carbon dioxide, so that the full-open-hole die block with the proper aperture size can be manufactured.
And step 140, putting the die into a heatable upper and lower parallel plate press for heating and vulcanizing, and heating at the temperature of 115 ℃ for 0.5 hour to finish the change of crosslinking large molecular weight by connecting a plurality of small molecular weights in series, thereby preparing the open pore bra pad with softness, high elasticity and ageing resistance.
And 150, demolding, taking out the bra pad, immediately putting the bra pad into a washing machine for washing, centrifuging, cleaning water, putting the water into an oven, drying for 3 hours at the temperature of 70 ℃, and dehumidifying while drying to prepare the latex foamed bra pad.
The latex foaming bra pad prepared by the method has excellent air permeability, the foaming material is frozen into a frozen ice cream shape by freezing, the foam holes have strength, and the parts which are not connected with adjacent holes when being pressed are broken because of thinness (particularly the parts of the atmospheric holes) to form a three-dimensional net structure. An electron microscope is shown at 1000 times magnification in fig. 2.
The natural latex used in the invention is breathable, not stuffy, has skin-like texture, is high-elastic and durable, and has antibacterial and anti-mite properties and strong support property.
With the above description of the specific embodiment, the method for manufacturing the latex foam bra pad provided by the invention has the following advantages compared with the prior art:
firstly, the main material is natural latex, which does not contain harmful substances, is anti-mite and bacteriostatic, light, soft, comfortable and healthy.
Second, in the foaming stage, the conventional method generally uses high-speed stirring to form uniform bubbles in the foam. In the application, low-speed stirring is adopted, so that bubbles with different sizes are naturally formed instead of uniform bubbles. And then, through freezing and introducing carbon dioxide gas with certain pressure, the wall of the bubble hole in the foaming body is broken to form a full-open-hole structure, the bubble hole in the foaming body is communicated with the gas hole to form an internal structure as shown in figure 2, so that the air permeability is greatly improved, and the elasticity is better.
Thirdly, the injected foaming material is not filled in the whole inner cavity of the mould, but is injected into 40-60% of the volume of the mould, so that the foaming material is decompressed and expanded to form secondary foaming to fill the mould during vacuumizing, and the foaming material has more air holes and the weight of a finished product is lighter.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (5)
1. The manufacturing method of the latex foaming bra pad is characterized by comprising the following steps:
taking 100 parts of natural latex, 1-2 parts of foaming stabilizer, 2-3 parts of sulfur, 2-4 parts of zinc oxide and 2-2 parts of accelerator Mz1 according to parts by weight, adding the materials into a foaming chamber of a foaming machine, simultaneously pressing air with the volume of 3-8 times of that of the natural latex, stirring and mixing to prepare a foaming material;
injecting the foaming material into a mold, and vacuumizing to ensure that the foaming material is decompressed, expanded and filled in the mold;
putting the mould into a refrigeration chamber for refrigeration for 10-20 minutes, and then introducing carbon dioxide gas for keeping for 3-5 minutes, wherein the pressure of the introduced carbon dioxide gas is 0.1-0.5 Mpa;
putting the mould into a plate press for heating and vulcanizing;
and taking the bra pad out of the die, cleaning and drying to obtain the foamed bra pad.
2. The method according to claim 1, wherein the air pressure of 3 to 8 times the volume of the natural rubber latex is controlled by an air flow meter.
3. The method of claim 1, wherein the freezing temperature is from-25 to-40 degrees.
4. The method of claim 1, wherein the injected foam is 40% to 60% of the mold volume.
5. The method of claim 1, wherein the drying is carried out in an oven at a temperature of 70 ℃ for 3 hours while dehumidifying the dried product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111191177.0A CN113801365A (en) | 2021-10-13 | 2021-10-13 | Method for manufacturing latex foaming bra pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111191177.0A CN113801365A (en) | 2021-10-13 | 2021-10-13 | Method for manufacturing latex foaming bra pad |
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| Publication Number | Publication Date |
|---|---|
| CN113801365A true CN113801365A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111191177.0A Pending CN113801365A (en) | 2021-10-13 | 2021-10-13 | Method for manufacturing latex foaming bra pad |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490906A (en) * | 2022-09-22 | 2022-12-20 | 江苏爱德福乳胶制品有限公司 | Method for manufacturing latex foaming bra pad |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2640036A (en) * | 1951-02-15 | 1953-05-26 | Us Rubber Co | Process for making latex sponge rubber |
| CN109627486A (en) * | 2018-12-20 | 2019-04-16 | 王欣 | A kind of pure natural latex mold cup and its preparation process |
| CN110625879A (en) * | 2019-10-09 | 2019-12-31 | 山东朗丽新材料有限公司 | Production process of latex product |
| CN113004585A (en) * | 2021-03-09 | 2021-06-22 | 浙江普娜拉纺织科技有限公司 | Natural latex foaming process and one-step formed latex bra cup mat |
-
2021
- 2021-10-13 CN CN202111191177.0A patent/CN113801365A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2640036A (en) * | 1951-02-15 | 1953-05-26 | Us Rubber Co | Process for making latex sponge rubber |
| CN109627486A (en) * | 2018-12-20 | 2019-04-16 | 王欣 | A kind of pure natural latex mold cup and its preparation process |
| CN110625879A (en) * | 2019-10-09 | 2019-12-31 | 山东朗丽新材料有限公司 | Production process of latex product |
| CN113004585A (en) * | 2021-03-09 | 2021-06-22 | 浙江普娜拉纺织科技有限公司 | Natural latex foaming process and one-step formed latex bra cup mat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490906A (en) * | 2022-09-22 | 2022-12-20 | 江苏爱德福乳胶制品有限公司 | Method for manufacturing latex foaming bra pad |
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Application publication date: 20211217 |
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