CN112848020A - Method for reinforcing substrate - Google Patents
Method for reinforcing substrate Download PDFInfo
- Publication number
- CN112848020A CN112848020A CN202011619826.8A CN202011619826A CN112848020A CN 112848020 A CN112848020 A CN 112848020A CN 202011619826 A CN202011619826 A CN 202011619826A CN 112848020 A CN112848020 A CN 112848020A
- Authority
- CN
- China
- Prior art keywords
- plate
- polystyrene
- polystyrene particles
- change material
- phase change
- 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.)
- Pending
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 6
- 239000004793 Polystyrene Substances 0.000 claims abstract description 63
- 229920002223 polystyrene Polymers 0.000 claims abstract description 63
- 239000002245 particle Substances 0.000 claims abstract description 41
- 239000012782 phase change material Substances 0.000 claims abstract description 27
- 238000010009 beating Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 238000007873 sieving Methods 0.000 claims abstract description 4
- 238000005728 strengthening Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 3
- 239000006260 foam Substances 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 12
- 239000011148 porous material Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KMOUUZVZFBCRAM-OLQVQODUSA-N (3as,7ar)-3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1C=CC[C@@H]2C(=O)OC(=O)[C@@H]21 KMOUUZVZFBCRAM-OLQVQODUSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/06—PS, i.e. polystyrene
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to the technical field of foam, in particular to a method for reinforcing a substrate, which comprises the following steps: selecting materials, namely selecting polystyrene particles, and sieving the polystyrene particles by a sieve with 10-20 meshes; placing the polystyrene particles into a mold, and flatly paving the screened polystyrene particles into a plate forming mold; and step three, extrusion forming, namely putting the plate forming die in a plate beating machine, pressurizing by steam, simultaneously uniformly spraying the phase change material into the plate forming die, and extruding the phase change material and the polystyrene particles in the plate forming die together to form the polystyrene plate in a plate shape. The invention can increase the strength of the polystyrene board on the basis of ensuring enough porosity.
Description
Technical Field
The invention relates to the technical field of foam, in particular to a method for reinforcing a substrate.
Background
The EPS board (expandable polystyrene board) has the advantages of light weight, low price, low thermal conductivity, small water absorption, good electrical insulation performance, sound insulation, shock resistance, moisture resistance, simple forming process and the like, thereby being widely used as heat insulation, sound insulation and earthquake-proof materials for buildings, ships, automobiles, trains, refrigeration, freezing and the like.
The EPS heat insulation board is used as a basic material for manufacturing other boards, and therefore, the EPS heat insulation board is also commonly called as a substrate.
When the existing EPS insulation board is prepared, EPS particles are directly used, foamed and then subjected to steam pressurization extrusion through a board beating machine to form the EPS insulation board.
In the conventional EPS insulation board, the EPS particles are tightly extruded, and the interfaces of the particles are in a complete molten state, so that the permeability of the EPS insulation board which is not processed is low, and the permeability is an essential factor required by the EPS insulation board serving as a substrate for subsequent processing. The permeability of the substrate is now often increased by making holes in the substrate. However, if the number of openings is too large, the strength of the substrate is impaired. Strength is also an important parameter of the substrate. Therefore, the permeability of the substrate must be improved while maintaining a certain strength. The current processing method cannot achieve the purpose.
Disclosure of Invention
The invention aims to provide a method for strengthening a substrate, so that the prepared EPS substrate has higher strength on the premise of meeting the porosity.
The method for strengthening the substrate in the scheme comprises the following steps:
selecting materials, namely selecting polystyrene particles, and sieving the polystyrene particles by a sieve with 10-20 meshes;
placing the polystyrene particles into a mold, and flatly paving the screened polystyrene particles into a plate forming mold;
and step three, extrusion forming, namely putting the plate forming die in a plate beating machine, pressurizing by steam, simultaneously uniformly spraying the phase change material into the plate forming die, and extruding the phase change material and the polystyrene particles in the plate forming die together to form the polystyrene plate in a plate shape.
The method has the advantages that:
the phase change material was infiltrated by spraying into the polystyrene particles directly while being steam pressurized with a beater, so that the polystyrene board formed had the pore sites occupied by the phase change material.
Further, in the second step, the polystyrene particles put into the plate forming mold are spread flat for more than two layers.
The volume weight of the formed polystyrene plate is larger than that of a conventional polystyrene plate, and the volume weight of the common polystyrene plate is 10-11kg/m3The volume weight of the polystyrene board produced by the method is 12-15kg/m3. The volume weight is improved, the compressive strength of the substrate can be effectively improved, and the heat insulation performance is improved.
The volume weight, usually the weight of an object per unit volume, is often used in engineering to refer to the weight of a cube, and in this case the volume weight refers to the density.
Further, in the third step, the plate beating temperature of the plate beating machine is 110-.
In the temperature range, the melting and extrusion of the polystyrene particles can be better completed.
Further, in the third step, the steam pressure is 0.7-0.9 MPa.
Under this vapor pressure, the phase change material can penetrate into the polystyrene board as quickly as possible. The steam pressure is preferably 0.8 MPa.
Furthermore, in the third step, the pressure of the plate beating machine is 0.6-0.8 MPa.
The trigger can extrude the polystyrene particles better to form the polystyrene board under the pressure. The trigger pressure is preferably 0.75 MPa.
Further, in step three, the phase change material is injected into the polystyrene board by the injection assisting device while the phase change material is sprayed in step three.
By means of the injection aid, the phase change material is injected into the polystyrene plate in addition to being sprayed on the surface.
Further, the plate beating temperature of the plate beating machine is 115 ℃.
Further, the steam pressure was 0.8 MPa.
Further, the pressure of the plate beating machine is 0.75 MPa.
Further, the penetration time of the phase change material was 25 seconds.
Drawings
Fig. 1 is a schematic structural diagram of an injection assisting apparatus according to a fourth embodiment of the present invention.
Fig. 2 is another schematic structural diagram of an injection assisting apparatus according to a fourth embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: a cover 1, a cover plate 2 and a needle tube 3.
Example one
In this embodiment, the method for strengthening a substrate includes the following steps:
selecting materials, namely selecting polystyrene particles, and sieving the polystyrene particles by a sieve with 10-20 meshes; the polystyrene particles are foamed from 80 meshes to 10-20 meshes by a foaming machine for later use.
Placing the polystyrene particles into a mold, and flatly paving the screened polystyrene particles into a plate forming mold; the plate forming die is a rectangular frame structure for placing polystyrene particles; the top end of the plate forming die is provided with an opening for the plate beating machine to make a large plate downwards;
in this step, the polystyrene particles placed in the sheeting mold are spread flat for more than two layers. The volume weight of the formed polystyrene plate is larger than that of a conventional polystyrene plate, and the volume weight of the conventional polystyrene plate is 10kg/m3The volume weight of the polystyrene board produced by the method is 14kg/m3. The volume weight is improved, the compressive strength of the substrate can be effectively improved, and the heat insulation performance is improved.
And step three, extrusion forming, namely putting the plate forming die in a plate beating machine, pressurizing by steam, simultaneously uniformly spraying the phase change material into the plate forming die, and extruding the phase change material and the polystyrene particles in the plate forming die together to form the polystyrene plate in a plate shape.
And step three, putting the plate into a plate beating machine, and performing extrusion forming by controlling the temperature to be 90-120 ℃ by water vapor, the steam pressure to be 0.7-0.9MPa, the pressure of the plate beating machine to be 0.6-0.8MPa and the time to be 20-30 seconds, wherein the plate beating temperature of the plate beating machine is preferably 110-120 ℃. In the temperature range, the melting and extrusion of the polystyrene particles can be better completed. The preferred strike temperature of the strike plate is 115 ℃. The plate beating machine can be realized by adopting the structure of the existing plate beating machine.
In the present embodiment, the steam pressure is preferably 0.8MPa, the trigger pressure is preferably 0.75MPa, and the penetration time is preferably 25 seconds.
According to the above method, when different condition parameters are selected, the quality of the reinforced substrate correspondingly formed is shown in the following table:
TABLE 1
Table 1 reflects the effect of different process parameters on substrate performance, and all data in table 2 were prepared from the same raw material at 25 ℃ using the same equipment. Because the porosity of the substrate is affected more, different equipment manufacturers, different weather temperatures and different raw material manufacturers have some differences.
The phase-change material in the embodiment is a material with the volume continuously reduced along with the time change, and through the phase-change material, the extruded plate can gradually generate more pores along with the time change on the basis of not influencing the strength of the plate.
This example directly penetrated the phase change material into the polystyrene particles by spraying while being steam pressurized with a beater, resulting in a polystyrene board having pore sites occupied by the phase change material.
To more intuitively illustrate the benefits of the polystyrene board produced by the method and the existing polystyrene board, the polystyrene board and the existing polystyrene board are compared, and the data are as follows:
TABLE 2
| This scheme (under the optimal parameter value) | Existing polystyrene board | |
| Volume weight | 14kg/m3 | 10kg/m3 |
| Porosity of the material | 600 ten thousand per cubic meter | 400 ten thousand per cubic meter |
| Strength of | Grade B1 | Grade B1 |
| Strength after inorganic slurry infiltration | Grade A2 | Grade A2 |
Example two
In this embodiment, the phase change material is replaced with capsule-shaped particles. The capsule particles meet the screening requirements as do polystyrene particles. The capsule-shaped particles comprise a high-temperature-resistant film material and a liquid hermetically packaged in the capsule-shaped particles. After the saccular particles and the polystyrene particles are extruded together to form the substrate, the high-temperature film material is aged and cracked by the large temperature difference through rapid cooling, so that the liquid in the high-temperature film material flows out, the volume of the whole saccular particles is reduced, and new pores are formed on the premise of not influencing the strength of the substrate.
EXAMPLE III
In the embodiment, after the third step, the polystyrene board is soaked in the reinforcing liquid with the mass of 1/3-1/5, and after the polystyrene board is completely absorbed, the polystyrene board is placed in an oven and is kept at the temperature of 50 +/-10 ℃ for 1 +/-0.5 h. The strengthening liquid comprises the following components in parts by weight: 60-80 parts of phenolic epoxy resin, 5-10 parts of acrylic diluent, 5-10 parts of tetrahydrophthalic anhydride and 0.02-0.08 part of epoxy resin defoaming agent.
Example four
In this embodiment, in the third step, the phase change material is injected into the polystyrene board by the injection assisting device while being sprayed.
As shown in fig. 1 and 2, the injection aid comprises a cover 1 and a cover plate 2 which are hermetically connected with each other, the cover 1 can be opened from the cover plate 2, and before the opening, a vacuum state is formed between the cover plate 2 and the cover 1. A plurality of needle tubes 3 arranged in a matrix are connected to the cover plate 2 in a penetrating manner. The two ends of the needle tube 3 penetrate through, and the phase-change material is placed in the needle tube 3.
The phase-change material in the scheme is a substance which can react with oxygen to generate deformation when meeting oxygen, such as iron, magnesium, paraffin and the like. The whole injection auxiliary device is arranged in the plate forming mold and is used together with the plate forming mold. When the plate is to be formed, the cover 1 is opened, oxygen enters the polystyrene plate through the needle tube 3, the phase-change material in the needle tube 3 reacts with the oxygen to generate deformation, the needle tube 3 is conducted, and paraffin and air enter the polystyrene plate to be formed to form uniform pores.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A method of strengthening a substrate, comprising:
selecting materials, namely selecting polystyrene particles, and sieving the polystyrene particles by a sieve with 10-20 meshes;
placing the polystyrene particles into a mold, and flatly paving the screened polystyrene particles into a plate forming mold;
and step three, extrusion forming, namely putting the plate forming die in a plate beating machine, pressurizing by steam, simultaneously uniformly spraying the phase change material into the plate forming die, and extruding the phase change material and the polystyrene particles in the plate forming die together to form the polystyrene plate in a plate shape.
2. The method of claim 1, wherein in step two, the polystyrene particles placed in the plate-forming mold are spread in two or more layers.
3. The method for reinforcing a substrate according to claim 1, wherein in the third step, the plate striking temperature of the plate striking machine is 110-120 ℃ during the extrusion molding.
4. The method of strengthening a substrate according to claim 1, wherein the vapor pressure is 0.7 to 0.9MPa in step three.
5. The method of claim 1, wherein in step three, the trigger pressure is 0.6-0.8 MPa.
6. The method of strengthening a substrate according to claim 1, wherein in step three, the phase change material is injected into the polystyrene board by an injection assisting device while the phase change material is sprayed.
7. The method of strengthening a substrate according to claim 3, wherein the plate striking temperature of the plate striking machine is 115 ℃.
8. The method of strengthening a substrate of claim 4, wherein the vapor pressure is 0.8 MPa.
9. The method of strengthening a substrate of claim 5, wherein the trigger pressure is 0.75 MPa.
10. The method of claim 6, wherein the phase change material has a penetration time of 25 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011619826.8A CN112848020A (en) | 2020-12-31 | 2020-12-31 | Method for reinforcing substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011619826.8A CN112848020A (en) | 2020-12-31 | 2020-12-31 | Method for reinforcing substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112848020A true CN112848020A (en) | 2021-05-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011619826.8A Pending CN112848020A (en) | 2020-12-31 | 2020-12-31 | Method for reinforcing substrate |
Country Status (1)
| Country | Link |
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| CN (1) | CN112848020A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139186A (en) * | 2007-08-20 | 2008-03-12 | 宁波荣山建筑节能科技有限公司 | Expanded perlite-polyurethane composite insulating board and manufacturing technique thereof |
| US8070876B1 (en) * | 2011-05-05 | 2011-12-06 | Haihong Jiang | Fireproof insulating cementitious foam comprising phase change materials |
| CN103043992A (en) * | 2013-01-15 | 2013-04-17 | 刘贵堂 | Flame-retardant and anti-aging insulation building material and preparation method and application thereof |
| CN105431479A (en) * | 2013-08-09 | 2016-03-23 | 金伯利-克拉克环球有限公司 | Technique for selectively controlling the porosity of a polymeric material |
| CN105670150A (en) * | 2016-03-07 | 2016-06-15 | 王惠波 | Polystyrene foamed plastic and preparation method thereof, and composite board prepared from polystyrene foamed plastic |
| CN106363937A (en) * | 2016-09-23 | 2017-02-01 | 济南大学 | Silica aerogel penetrating A-class fireproof heat retaining panel and manufacturing method thereof |
| CN108164743A (en) * | 2017-12-22 | 2018-06-15 | 山东盛都节能科技有限公司 | A grades of fire-proof plates of graphite and preparation method and production equipment |
| CN108715544A (en) * | 2018-05-02 | 2018-10-30 | 江苏宏发海绵城市科技有限公司 | A kind of permeable brick producing process |
| CN111518344A (en) * | 2020-04-29 | 2020-08-11 | 刘涛 | Preparation method of low-temperature-resistant polyvinyl chloride composite material |
-
2020
- 2020-12-31 CN CN202011619826.8A patent/CN112848020A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139186A (en) * | 2007-08-20 | 2008-03-12 | 宁波荣山建筑节能科技有限公司 | Expanded perlite-polyurethane composite insulating board and manufacturing technique thereof |
| US8070876B1 (en) * | 2011-05-05 | 2011-12-06 | Haihong Jiang | Fireproof insulating cementitious foam comprising phase change materials |
| CN103043992A (en) * | 2013-01-15 | 2013-04-17 | 刘贵堂 | Flame-retardant and anti-aging insulation building material and preparation method and application thereof |
| CN105431479A (en) * | 2013-08-09 | 2016-03-23 | 金伯利-克拉克环球有限公司 | Technique for selectively controlling the porosity of a polymeric material |
| CN105670150A (en) * | 2016-03-07 | 2016-06-15 | 王惠波 | Polystyrene foamed plastic and preparation method thereof, and composite board prepared from polystyrene foamed plastic |
| CN106363937A (en) * | 2016-09-23 | 2017-02-01 | 济南大学 | Silica aerogel penetrating A-class fireproof heat retaining panel and manufacturing method thereof |
| CN108164743A (en) * | 2017-12-22 | 2018-06-15 | 山东盛都节能科技有限公司 | A grades of fire-proof plates of graphite and preparation method and production equipment |
| CN108715544A (en) * | 2018-05-02 | 2018-10-30 | 江苏宏发海绵城市科技有限公司 | A kind of permeable brick producing process |
| CN111518344A (en) * | 2020-04-29 | 2020-08-11 | 刘涛 | Preparation method of low-temperature-resistant polyvinyl chloride composite material |
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Application publication date: 20210528 |
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