CN109181000B - Diatomite modification method, PVC (polyvinyl chloride) wire coil pad and manufacturing method - Google Patents

Diatomite modification method, PVC (polyvinyl chloride) wire coil pad and manufacturing method Download PDF

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CN109181000B
CN109181000B CN201811000310.8A CN201811000310A CN109181000B CN 109181000 B CN109181000 B CN 109181000B CN 201811000310 A CN201811000310 A CN 201811000310A CN 109181000 B CN109181000 B CN 109181000B
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diatomite
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CN109181000A (en
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姚聪明
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Taicang All Mats Plastic Industry Co ltd
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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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G27/00—Floor fabrics; Fastenings therefor
    • A47G27/02—Carpets; Stair runners; Bedside rugs; Foot mats
    • A47G27/0243—Features of decorative rugs or carpets
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/26—Silicon- containing compounds
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/02—Ingredients treated with inorganic substances
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride

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Abstract

The invention discloses a diatomite modification method, a PVC (polyvinyl chloride) wire coil pad and a manufacturing method, wherein the diatomite modification method comprises the steps of preparing a mixed solution, filtering, washing, calcining and forming; the PVC wire coil pad comprises a bottom layer, a wire coil layer and a surface adhesive coating which are sequentially arranged from bottom to top, wherein the manufacturing material of the wire coil layer comprises PVC, DOTP, ACR, a calcium-zinc stabilizer, a lubricant and modified diatomite, and the weight share range of the material of the wire coil layer is as follows: 100 parts of PVC, 65-70 parts of DOTP, 20-25 parts of modified diatomite, 4-5 parts of ACR, 2-3 parts of calcium-zinc stabilizer and 0.3-0.9 part of lubricant. The porosity, the water absorption rate and the water absorption capacity of the modified diatomite disclosed by the invention are greatly improved compared with those before modification; the modified diatomite is added into the PVC wire coil pad, so that the water absorption rate and the water absorption capacity of the PVC wire coil pad can be greatly improved, and the PVC wire coil pad has the advantages of corrosion resistance, moisture absorption, mildew resistance and the like.

Description

Diatomite modification method, PVC (polyvinyl chloride) wire coil pad and manufacturing method
Technical Field
The invention relates to the field of modified diatomite, in particular to a diatomite modification method, a PVC (polyvinyl chloride) wire coil pad and a manufacturing method.
Background
The bathroom foot pad is an essential household article for each bathroom, the commonly used bathroom foot pad is mostly a hair planting ground pad, although the water absorption property is good, the foot pad is not easy to dry and mildews, sour and stink are given off at intervals when the foot pad is placed on a door for a long time, the foot pad can be washed and replaced in a week, people can directly step on the foot pad after bathing, a large number of bacteria and mites are attached to the sole of the foot, then the foot pad is taken to each corner of a home, and various health problems such as red rash, acne and cough are easily caused.
The PVC wire ring pad is a star product of the company, is not easy to breed bacteria and mites, is easy to dry, but has far lower water absorption than a flocked ground pad.
Diatomite raw material, famous home decoration environment-friendly material, is called as wall that can breathe, diatom has come from ancient times, for hundreds of millions of years, the embodiment is soil, form siliceous sedimentary rock of diatom-diatomaceous earth; the diatomite raw material has a special porous structure, the superfine micropores are 5000 to 6000 times more than the activated carbon, the drying is fast, and the water with the weight 2 to 4 times of the self weight can be absorbed; the other powerful function is that the air purifier has physical adsorption and ion exchange functions, and can absorb, decompose and convert formaldehyde, benzene and radioactive substances in the air into harmless substances, so that the air purifier has a smell purification effect.
Although the diatomite has a porous structure, the diatomite has small pores, insufficient water storage property and insufficient compatibility with PVC, and is not easy to disperse and agglomerate.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a diatomite modification method, a PVC (polyvinyl chloride) wire coil pad and a manufacturing method, wherein the technical scheme is as follows:
in one aspect, the invention provides a method for modifying diatomite, which comprises the following steps:
step 1, preparing a mixed solution: soaking a kieselguhr raw material in dilute hydrochloric acid at the soaking temperature of lower than 35 ℃, monitoring the pH value of the solution in real time, adding sodium hydroxide when the pH value reaches 4-6, controlling the temperature to be lower than 45 ℃, adding stearic acid after the sodium hydroxide is completely dissolved, heating and stirring the mixture, and reacting the mixture at the temperature of 70-90 ℃ for a preset time to obtain a mixed solution;
step 2, filtering and washing: filtering the mixed solution, putting the filtered solid powder into water containing plastic particles for water washing until the plastic particles can be floated or suspended by the filtrate after water washing, and then removing the filtrate and the plastic particles to obtain solid particles;
step 3, calcining: calcining the solid particles in a muffle furnace at 400-600 ℃ for 3-5h to obtain large-particle calcined diatomite, and grinding the large-particle calcined diatomite into corresponding meshes meeting preset requirements;
step 4, forming: and (3) placing the calcined diatomite obtained by grinding into a mixer, adding a mixture of long-chain fatty alcohol monophosphate and hydroxyl modified silicone oil, and mixing to obtain the modified diatomite.
Further, the adding amount ratio of the diatomite to the dilute hydrochloric acid in the step 1 is 1.0-1.3 tons: 100L.
Further, in the step 2, the plastic particles are made of PP and talcum powder, and the density of the plastic particles is 0.98-1.03 multiplied by 103kg/m3。
Further, the grinding in the step 3 is carried out to obtain the corresponding mesh number range meeting the preset requirement, which is 40-2500 meshes.
Further, in the step 4, the mass ratio of the long-chain fatty alcohol monophosphate to the hydroxyl modified silicone oil is 6-8: 1.
On the other hand, the invention also provides a PVC wire coil pad, which comprises a bottom layer, a wire coil layer and a surface adhesive coating which are sequentially arranged from bottom to top, wherein the manufacturing materials of the wire coil layer comprise PVC, DOTP, ACR (acrylate copolymer), calcium zinc stabilizer, lubricant and the modified diatomite, and the weight share range of the material of the wire coil layer is as follows:
Figure BDA0001782819400000021
further, the bottom layer is made of a material comprising PVC, a plasticizer, a stabilizer, calcium carbonate and modified diatomite, wherein the modified diatomite accounts for 1-5% by mass.
Further, the surface glue coating is made of a material comprising PVC powder, a plasticizer DOTP, a calcium-zinc composite stabilizer and modified diatomite, wherein the mass percentage of the modified diatomite is 1-5%.
In another aspect, the present invention provides a method for manufacturing the PVC wire loop mat, comprising the steps of:
s1, mixing PVC, DOTP, a calcium zinc stabilizer and a lubricant, and granulating to obtain particles 1;
s2, mixing ACR, modified diatomite and a lubricant, and granulating to obtain particles 2;
s3, mixing, extruding, spinning and forming the particles 1 and 2 to form a loop layer;
s4, coating a surface glue coating on the wire coil layer;
s5, removing part of the surface glue coating by friction;
and S6, attaching a bottom layer to one surface of the wire coil layer far away from the surface glue coating, and performing plasticizing operation.
In another aspect, the present invention provides another method for manufacturing the PVC wire loop gasket, comprising the steps of:
s1, mixing PVC, DOTP, a calcium zinc stabilizer and a lubricant, and granulating to obtain particles 1;
s2, mixing ACR, modified diatomite and a lubricant, and granulating to obtain particles 2;
s3, mixing, extruding, spinning and forming the particles 1 and 2 to form a loop layer;
s4, coating a surface glue coating on the wire coil layer;
s5, spraying modified diatomite on the surface glue coating, and then carrying out heating, plasticizing and sintering to enable the modified diatomite to be adhered to the coil layer;
and S6, attaching a bottom layer to one surface of the wire coil layer far away from the surface glue coating, and performing plasticizing operation.
The technical scheme provided by the invention has the following beneficial effects:
a. the porosity of the modified diatomite is improved by 18-20%, and the water absorption rate (water absorption within 30 seconds) is improved by 46-50%; the water absorption capacity (30 min) is improved by 30-35% compared with that before modification;
b. the modified diatomite is added into the wire coil layer, so that the water absorption rate (water absorption within 30 seconds) of the PVC wire coil pad produced by the original formula is increased by 22-27%, and the water absorption capacity (water absorption within 30 min) is increased by 16-20% compared with that before modification, so that the PVC wire coil pad has the advantages of corrosion resistance, moisture absorption, mold resistance and the like;
c. spraying modified diatomite on the surface of the wire loop layer to ensure that the modified diatomite is attached to the wire loop layer under the bonding action of the surface glue, the water absorption rate (water absorption within 30 seconds) of the PVC wire loop pad produced by the original production process is improved by 34-39%, and the water absorption capacity (water absorption capacity within 30 min) of the PVC wire loop pad is improved by 25-30% compared with that before modification;
d. the PVC wire coil pad added with the modified diatomite has a firm and stable layer net-shaped porous structure, has physical adsorption and purification performance, and can adsorb, decompose and convert dust, viruses, radioactive substances and the like in the air into harmless substances, thereby having the effect of deodorizing;
e. the preparation method of the PVC wire coil pad has the advantages of convenience, simplicity, easiness in operation and the like, and is suitable for batch production and wide application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for modifying diatomaceous earth provided in an embodiment of the present invention;
FIG. 2 is a flow chart of a method for making a PVC wire loop mat according to an embodiment of the present invention;
fig. 3 is a flow chart of another method for manufacturing the PVC wire loop pad according to the embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments 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 given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a modification method of diatomite, which comprises the following specific implementation modes: soaking a kieselguhr raw material in dilute hydrochloric acid at the soaking temperature of lower than 35 ℃, monitoring the pH value of the solution in real time, adding sodium hydroxide when the pH value reaches 4-6, controlling the temperature to be lower than 45 ℃, adding stearic acid after the sodium hydroxide is completely dissolved, heating and stirring the mixture, and reacting the mixture at the temperature of 70-90 ℃ for a preset time to obtain a mixed solution; filtering the mixed solution, putting the filtered solid powder into water containing plastic particles for water washing until the plastic particles can be floated or suspended by the filtrate after water washing, and then removing the filtrate and the plastic particles to obtain solid particles; calcining the solid particles in a muffle furnace at 400-600 ℃ for 3-5h to obtain large-particle calcined diatomite, and grinding the large-particle calcined diatomite into corresponding meshes meeting preset requirements (the corresponding mesh range of the preset requirements is 40-2500 meshes); and finally, placing the calcined diatomite obtained by grinding into a mixer, adding a mixture of the long-chain fatty alcohol monophosphate and the hydroxyl modified silicone oil (the mass ratio of the long-chain fatty alcohol monophosphate to the hydroxyl modified silicone oil is 6-8:1), and mixing to obtain the modified diatomite. Tests prove that the water absorption rate of the modified diatomite is greatly improved compared with that before modification, and the water absorption capacity is greatly improved compared with that before modification.
Example 1: preparation of modified diatomaceous Earth
The embodiment of the method for modifying diatomite is shown in fig. 1, and the specific embodiment is as follows: preparing a diatomite raw material, and soaking 1 ton of diatomite raw material in 100L of 10% dilute hydrochloric acid (the mass fraction of the dilute hydrochloric acid is less than 20%), wherein the adding amount ratio of the diatomite to the dilute hydrochloric acid is 1.0-1.3 tons: 100L (adding the diatomite and the dilute hydrochloric acid in sequence, firstly adding the dilute hydrochloric acid, and adding the diatomite in batches), continuously monitoring the pH value of the solution during soaking until the pH value reaches 4-6, then adding 10Kg of sodium hydroxide, and controlling the temperature to be lower than 45 ℃ during adding; after the sodium hydroxide is completely dissolved, adding stearic acid preferably 60Kg, heating and stirring, and reacting for 2h at the temperature of preferably 90 ℃ to obtain a mixed solution; filtering the mixed solution, and adding the solid powder into plastic particles (made of PP and pulvis Talci, and having density of 0.98-1.03 × 10)3kg/m3) Washing with water (to remove impurities) until the washed filtrate can float or suspend the plastic particles, and removing the filtrate and plastic particles to obtain solid particles; placing the solid particles obtained after washing in a preferable placeCalcining in a muffle furnace at 500 ℃ for 5 hours preferably to obtain large granular calcined diatomite, and grinding the calcined diatomite to 1500 meshes preferably; transferring the calcined diatomite obtained by grinding into a high-speed mixer, and after the mixture (preferably 6:1) of the long-chain fatty alcohol monophosphate and the hydroxyl modified silicone oil is kept warm for 10min at 80 ℃, quickly transferring the mixture into the mixer to be mixed with the calcined diatomite, thereby obtaining the superfine porous modified diatomite. Through test tests, the water absorption rate (water absorption within 30 seconds) of the modified diatomite is improved by 48 percent compared with that of the unmodified diatomite raw material, and the water absorption capacity (water absorption capacity within 30 min) of the modified diatomite is improved by 32 percent compared with that before modification.
Example 2: PVC wire ring pad
In an embodiment of the invention, a PVC wire coil pad is provided, which comprises a bottom layer, a wire coil layer and a surface adhesive coating, which are sequentially arranged from bottom to top, wherein the bottom layer is made of materials including PVC, a plasticizer, a stabilizer, calcium carbonate and the modified diatomite described in the above embodiment, wherein the modified diatomite is less than or equal to 5% by mass (in another case, the bottom layer may not contain the modified diatomite); the material for manufacturing the surface adhesive coating comprises PVC powder, a plasticizer DOTP, a calcium-zinc composite stabilizer and the modified diatomite described in the first embodiment (in another case, the surface adhesive coating does not contain the modified diatomite), wherein the mass percentage of the modified diatomite is less than or equal to 5%.
The material for manufacturing the loop layer comprises PVC, DOTP, ACR (acrylate copolymer), calcium zinc stabilizer, lubricant and the modified diatomite described in the above embodiment, and the weight share ranges of the loop layer material are as follows:
Figure BDA0001782819400000061
example 3: PVC wire ring pad I
In one embodiment of the present invention, the weight proportions of the material of the wire loop layer are:
Figure BDA0001782819400000062
one specific manufacturing method of the wire loop pad is as follows: firstly, 100 parts of PVC, 70 parts of DOTP, 3 parts of calcium-zinc stabilizer and 0.45 part of lubricant are mixed and granulated to obtain particles 1; then mixing 5 parts of ACR, 25 parts of modified diatomite and 0.45 part of lubricant, and granulating to obtain particles 2; finally, mixing, extruding and spinning the particles 1 and 2 for forming, after coating a surface adhesive coating, spraying the modified diatomite on the surface adhesive coating by using a powder spraying machine, and then carrying out heating, plasticizing and sintering to ensure that the bottom of the modified diatomite particles is attached to the coil layer under the adhesive action of the surface adhesive, wherein the addition amount of the diatomite per square meter is 120 g; and attaching the bottom layer to one surface of the wire coil layer, which is far away from the surface glue coating, and performing plasticizing operation. The water absorption rate (water absorption within 30 seconds) of the modified PVC wire coil pad produced by the method is increased by 47 percent compared with that of the PVC wire coil pad produced by a formula without adding modified diatomite; the water absorption capacity (30 min) is improved by 34 percent compared with the PVC wire coil pad produced by the formula without the modified diatomite.
Example 4: PVC wire ring pad II
In a preferred embodiment of the present invention, the weight proportions of the material of the wire loop layer are:
Figure BDA0001782819400000071
the manufacturing material of the original PVC wire coil layer comprises PVC, DOTP, calcium carbonate, a calcium zinc stabilizer and a lubricant, in the invention, the calcium carbonate is replaced by modified diatomite and ACR, the ACR is a processing aid and is added into the wire coil layer to improve the low temperature resistance of the wire coil layer, and another specific manufacturing method of the PVC wire coil pad comprises the following steps: firstly, 100 parts of PVC, 65 parts of DOTP, 3 parts of calcium-zinc stabilizer and 0.4 part of lubricant are mixed and granulated to obtain particles 1; then mixing and granulating ACR4 parts, modified diatomite 20 parts and lubricant 0.4 part to obtain particles 2; then mixing, extruding and spinning the particles 1 and 2 to form a ring layer; after applying the face gum coating on the wire loop layer, rubbing off a portion of the coating (preferably using a gravel rubbing coating); and finally, attaching the bottom layer to one surface of the wire coil layer, which is far away from the surface adhesive coating, and performing plasticizing operation to form the PVC wire coil pad. Tests show that the water absorption rate (water absorption within 30 seconds) of the PVC wire loop pad produced by adding the modified diatomite is improved by 23 percent and the water absorption capacity (water absorption capacity within 30 min) of the PVC wire loop pad produced by adding the modified diatomite is improved by 16 percent compared with the PVC wire loop pad produced by a formula without adding the modified diatomite.
Example 5: PVC wire ring pad III
In one embodiment of the present invention, the weight proportions of the material of the wire loop layer are:
Figure BDA0001782819400000072
PVC wire coil pad is prepared by the same method as example 4, except that the weight portion of the material of the wire coil layer is different, 100 parts of PVC, 65 parts of DOTP, 3 parts of calcium zinc stabilizer and 0.4 part of lubricant are mixed and granulated to obtain particles 1; then, ACR4 parts, modified diatomaceous earth 20 parts, and lubricant 0.4 part were mixed and granulated to obtain particles 2. Tests show that the water absorption rate (water absorption within 30 seconds) of the PVC wire loop pad added with the modified diatomite is improved by 23 percent compared with that of the PVC wire loop pad produced by a formula without the modified diatomite; the water absorption capacity (30 min) is improved by 16 percent compared with the PVC wire coil pad produced by the formula without the modified diatomite.
In other optional embodiments, the weight portions of the material for making the coil layer are:
Figure BDA0001782819400000081
example 6
In an embodiment of the present invention, a method for manufacturing a PVC wire loop pad is provided, and the method for manufacturing the PVC wire loop pad is shown in fig. 2, and includes the following steps:
s1, mixing PVC, DOTP, a calcium zinc stabilizer and a lubricant, and granulating to obtain particles 1;
s2, mixing ACR, modified diatomite and a lubricant, and granulating to obtain particles 2;
s3, mixing, extruding, spinning and forming the particles 1 and 2 to form a loop layer;
s4, coating a surface glue coating on the wire coil layer;
s5, removing part of the surface glue coating by friction;
and S6, attaching a bottom layer to one surface of the silk loop layer far away from the surface glue layer, and performing plasticizing operation.
Example 7
In an embodiment of the present invention, another method for manufacturing a PVC wire loop gasket is provided, and the manufacturing method is shown in fig. 3, and includes the following steps:
s1, mixing PVC, DOTP, a calcium zinc stabilizer and a lubricant, and granulating to obtain particles 1;
s2, mixing ACR, modified diatomite and a lubricant, and granulating to obtain particles 2;
s3, mixing, extruding, spinning and forming the particles 1 and 2 to form a loop layer;
s4, coating a surface glue coating on the wire coil layer;
s5, spraying modified diatomite on the surface glue coating, and then carrying out heating, plasticizing and sintering to enable the modified diatomite to be adhered to the coil layer;
and S6, attaching a bottom layer to one surface of the wire coil layer far away from the surface glue coating, and performing plasticizing operation.
The invention provides a diatomite modification method, a PVC (polyvinyl chloride) wire coil pad and a manufacturing method, wherein the porosity, the water absorption rate and the water absorption capacity of the modified diatomite disclosed by the invention are greatly improved compared with those before modification; the modified diatomite is added into the PVC wire coil pad, so that the water absorption rate and the water absorption capacity of the PVC wire coil pad can be greatly improved, and the PVC wire coil pad has the advantages of corrosion resistance, moisture absorption, mildew resistance and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. The method for modifying the diatomite is characterized by comprising the following steps:
step 1, preparing a mixed solution: soaking a kieselguhr raw material in dilute hydrochloric acid at the soaking temperature of lower than 35 ℃, monitoring the pH value of the solution in real time, adding sodium hydroxide when the pH value reaches 4-6, controlling the temperature to be lower than 45 ℃, adding stearic acid after the sodium hydroxide is completely dissolved, heating and stirring the mixture, and reacting the mixture at the temperature of 70-90 ℃ for a preset time to obtain a mixed solution;
step 2, filtering and washing: filtering the mixed solution, putting the filtered solid powder into water containing plastic particles for water washing until the plastic particles can be floated or suspended by the filtrate after water washing, and then removing the filtrate and the plastic particles to obtain solid particles; the plastic particles are made of PP and talcum powder, and the density of the plastic particles is 0.98-1.03 x 103 kg/m3；
Step 3, calcining: calcining the solid particles in a muffle furnace at 400-600 ℃ for 3-5h to obtain large-particle calcined diatomite, and grinding the large-particle calcined diatomite into corresponding meshes meeting preset requirements;
step 4, forming: and (3) placing the calcined diatomite obtained by grinding into a mixer, adding a mixture of long-chain fatty alcohol monophosphate and hydroxyl modified silicone oil, and mixing to obtain the modified diatomite.
2. The method for modifying diatomaceous earth according to claim 1, wherein the addition amount ratio of diatomaceous earth to dilute hydrochloric acid in step 1 is 1.0 to 1.3 tons: 100L.
3. The method for modifying diatomite as claimed in claim 1, wherein the grinding in step 3 is performed to obtain a corresponding mesh size in the range of 40-2500 meshes according to the preset requirement.
4. The method for modifying diatomaceous earth according to claim 1, wherein the mass ratio of the long-chain fatty alcohol monophosphate to the hydroxyl-modified silicone oil in step 4 is in a range from 6 to 8: 1.
5. A PVC wire ring pad is characterized by comprising a bottom layer, a wire ring layer and a surface adhesive coating which are sequentially arranged from bottom to top, wherein the manufacturing material of the wire ring layer comprises PVC, DOTP, ACR, calcium zinc stabilizer, lubricant and the modified diatomite of any one of claims 1-4, and the weight share range of the material of the wire ring layer is as follows:
100 portions of PVC
65-70 portions of DOTP
20-25 parts of modified diatomite
ACR4-5 parts
2-3 parts of calcium-zinc stabilizer
0.3-0.9 part of lubricant;
the bottom layer is made of materials comprising PVC, a plasticizer, a stabilizer, calcium carbonate and the modified diatomite of any one of claims 1-4, wherein the mass percent of the modified diatomite is less than or equal to 5%.
6. The PVC wire coil pad according to claim 5, wherein the surface rubber coating is made of PVC powder, a plasticizer DOTP, a calcium-zinc composite stabilizer and the modified diatomite of any one of claims 1-4, wherein the mass percent of the modified diatomite is less than or equal to 5%.
7. A method for making a PVC wire loop mat according to claim 5 or 6, characterized in that it comprises the following steps:
s1, mixing PVC, DOTP, a calcium zinc stabilizer and a lubricant, and granulating to obtain particles 1;
s2, mixing ACR, modified diatomite and a lubricant, and granulating to obtain particles 2;
s3, mixing, extruding, spinning and forming the particles 1 and 2 to form a loop layer;
s4, coating a surface glue coating on the wire coil layer;
s5, removing part of the surface glue coating by friction;
and S6, attaching a bottom layer to one surface of the wire coil layer far away from the surface glue coating, and performing plasticizing operation.
8. A method for making a PVC wire loop mat according to claim 5 or 6, characterized in that it comprises the following steps:
s1, mixing PVC, DOTP, a calcium zinc stabilizer and a lubricant, and granulating to obtain particles 1;
s2, mixing ACR, modified diatomite and a lubricant, and granulating to obtain particles 2;
s3, mixing, extruding, spinning and forming the particles 1 and 2 to form a loop layer;
s4, coating a surface glue coating on the wire coil layer;
s5, spraying modified diatomite on the surface glue coating, and then carrying out heating, plasticizing and sintering to enable the modified diatomite to be adhered to the coil layer;
and S6, attaching a bottom layer to one surface of the wire coil layer far away from the surface glue coating, and performing plasticizing operation.
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