CN108705833B - Hard polyvinyl chloride foamed energy-saving board - Google Patents

Hard polyvinyl chloride foamed energy-saving board Download PDF

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Publication number
CN108705833B
CN108705833B CN201810349120.0A CN201810349120A CN108705833B CN 108705833 B CN108705833 B CN 108705833B CN 201810349120 A CN201810349120 A CN 201810349120A CN 108705833 B CN108705833 B CN 108705833B
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China
Prior art keywords
parts
foaming
board
polyvinyl chloride
sugarcane
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CN201810349120.0A
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CN108705833A (en
Inventor
黄磊
李海燕
徐莹莹
卢志豪
黄修奖
张聪聪
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Guangxi Jiuquan New Building Materials Co ltd
Guangxi Institute of Occupational
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Guangxi Jiuquan New Building Materials Co ltd
Guangxi Institute of Occupational
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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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • 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
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • 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
    • C08J9/0014—Use of organic additives
    • C08J9/0023—Use of organic additives containing oxygen
    • 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
    • C08J9/06—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 chemical blowing agent
    • C08J9/08—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 chemical blowing agent developing carbon dioxide
    • 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
    • C08J9/06—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 chemical blowing agent
    • C08J9/10—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 chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • 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
    • C08J9/06—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 chemical blowing agent
    • C08J9/10—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 chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/104—Hydrazines; Hydrazides; Semicarbazides; Semicarbazones; Hydrazones; Derivatives thereof
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/065—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
    • 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
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • 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
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
    • 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
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • 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
    • C08J2327/00—Characterised by the use 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; Derivatives of such polymers
    • C08J2327/02—Characterised by the use 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; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use 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; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride
    • 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
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters

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  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Medicine (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
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Abstract

The invention relates to a rigid polyvinyl chloride foaming energy-saving board which is characterized by comprising a foaming board and a plant fiber layer arranged in the middle of the foaming board, wherein the foaming board comprises the following raw materials in parts by weight: 80-100 parts of PVC resin, 5-10 parts of active pyrophyllite, 6-12 parts of acrylate modifier, 5-20 parts of dichloromethane, 4-8 parts of dibutyl phthalate, 1-4 parts of composite heat stabilizer, 2-5 parts of composite foaming agent, 0.1-1 part of lubricant and 1-3 parts of nucleating agent. The components of the hard polyvinyl chloride foamed energy-saving board are scientifically compatible, so that the board has excellent flame retardance, compression strength, impact strength, hardness, heat and sound insulation, thermal stability and comprehensive performance, and is added with the sugarcane fiber layer, so that the waste is changed into valuable, the cost is greatly reduced, and the board is widely applied to the fields of building materials, decorative materials, traffic noise reduction and the like.

Description

Hard polyvinyl chloride foamed energy-saving board
Technical Field
The invention belongs to the technical field of polyvinyl chloride processing, and particularly relates to a rigid polyvinyl chloride foaming energy-saving plate.
Background
The PVC foamed sheet is a novel plastic material developed in the foreign 20 th century 70 s, has excellent performance due to the unique production process technology, and is widely applied to industries such as buildings, furniture, decoration and finishing, advertisement manufacturing, exhibition signs, market appearance environmental protection, art designing materials and the like. The rigid polyvinyl chloride foamed board is one of the materials with excellent performance, and can replace wood, plywood, particle board and metal plate to be used in various occasions. In recent years, the production of hard polyvinyl chloride foamed plates in China is advanced, but the scale, product variety and quality aspects are not adapted to the development situation of the chemical building material market in China, and the related formula, process conditions, equipment structure parameters of the extrusion foaming process and the relationship between the parameters and the density and the performance of a foamed product are required to be further researched and optimized. The PVC foaming plate used at present mainly has the problems of uneven foaming plate surface, insufficient hardness, poor surface smoothness, poor heat insulation effect, poor aging resistance and flame retardant property, low outturn rate and the like, and the performance of the PVC foaming plate can be seriously reduced under the condition of higher use temperature, thus seriously affecting the use field. In addition, the sugarcane fiber/bagasse, which is a residue in the agricultural production process, is a highly concentrated fiber raw material resource, and has the advantages of large yield, short regeneration period, renewability, biodegradability, environmental friendliness and the like. The annual bagasse yield of China is about 1200 ten thousand tons, most of the sugarcane fibers are used for manufacturing low-benefit products such as straw paper, feed and the like, and the utilization rate of bagasse is not high and the additional value is low. How to reasonably utilize the huge green resources has important practical significance and theoretical research value.
Disclosure of Invention
The invention aims to provide a hard polyvinyl chloride foamed energy-saving plate which is convenient to construct, energy-saving and environment-friendly, has excellent flame retardance, compression strength, impact strength, hardness, heat insulation and sound insulation and thermal stability, and is widely applied to the fields of building materials, decorative materials, traffic noise reduction and the like.
The invention is realized by the following steps:
the hard polyvinyl chloride foaming energy-saving board is characterized by comprising a foaming board and a plant fiber layer arranged in the middle of the foaming board, wherein the foaming board comprises the following raw materials in parts by weight: 80-100 parts of PVC resin, 5-10 parts of active pyrophyllite, 6-12 parts of acrylate modifier, 5-20 parts of dichloromethane, 4-8 parts of dibutyl phthalate, 1-4 parts of composite heat stabilizer, 2-5 parts of composite foaming agent, 0.1-1 part of lubricant and 1-3 parts of nucleating agent.
Further preferably, the plant fiber layer is a sugar cane fiber layer, and the preparation method of the sugar cane fiber layer comprises the following steps:
a. crushing bagasse, which is a byproduct generated in the sugar production process of sugarcane, in water, softening and filtering, soaking the obtained filter residue in a treatment solution for 3-4 hours at the soaking temperature of 30-45 ℃, performing acid neutralization and ultrasonic cleaning on the treated bagasse, drying until the moisture content is less than 5%, then crushing in a crusher to obtain 300-mesh 500-mesh sugarcane fiber,
b. and (2) sizing the crushed sugarcane fibers, feeding the sugarcane fibers subjected to sizing into a spreading machine, spreading the sugarcane fibers into a sugarcane fiber blank layer, feeding the sugarcane fiber blank layer into a prepressing machine for prepressing, and feeding the sugarcane fiber blank layer subjected to prepressing into a hot press for hot press molding to obtain the sugarcane fiber layer.
More preferably, the treatment solution is NaOH and H2O2The mixed aqueous solution of (1), wherein the final concentration of NaOH in the mixed aqueous solution is 2% -4%, H2O2The final concentration in the mixed aqueous solution is 1-2%.
Further preferably, the pre-pressing temperature is 160-.
Further preferably, the preparation method of the active pyrophyllite comprises the following steps: and (3) putting the pyrophyllite powder and the titanate coupling agent into a vibrating machine for grinding according to the mass ratio of 100:0.5-1, wherein the grinding time is 40-50 minutes, and the granularity of the ground pyrophyllite is 5-15um, so that the active pyrophyllite is obtained.
More preferably, the composite heat stabilizer is prepared from zinc glycerolate, calcium stearate, pentaerythritol, epoxidized soybean oil and an antioxidant; the mass ratio of the zinc glycerolate to the calcium stearate to the pentaerythritol to the epoxidized soybean oil to the antioxidant is 1-1.5:2:1:0.5: 0.3.
Further preferably, the composite foaming agent is prepared from azodicarbonamide, uric acid, zinc carbonate and sodium bicarbonate; the mass ratio of the azodicarbonamide to the uric acid to the zinc carbonate to the sodium bicarbonate is 4:1:1: 4.
Further preferably, the lubricant is made from ethylene bis stearamide, a polymerizable borate surfactant, and glyceryl monostearate; the mass ratio of the ethylene bis stearamide to the polymerizable borate surfactant to the stearic acid monoglyceride is 1:2: 10.
Further preferably, the nucleating agent is active nano calcium carbonate.
The preparation method of the rigid polyvinyl chloride foamed energy-saving board comprises the following steps:
s1, grinding: putting the PVC resin, the active pyrophyllite and the composite heat stabilizer into a ball-milling mixer according to the formula ratio, and grinding for 1 hour to obtain a mixture;
s2, high-speed hot mixing: adding the acrylate modifier, dichloromethane, dibutyl phthalate, the composite foaming agent, the lubricant and the nucleating agent into the mixture according to the formula ratio, and then sending the mixture into a high-speed thermal mixing stirrer for stirring for 30-40 minutes at the stirring speed of 40-50r/min and the thermal mixing temperature of 125-130 ℃;
s3, low-speed cold mixing: putting the mixture after hot mixing into a high-speed cold mixing stirrer for stirring for 45-55 minutes at a stirring speed of 70-80r/min and at a cold mixing temperature of 35-40 ℃ to obtain a pre-pressing material;
s4, mould pressing and foaming: adding the prepressing material into a mould, heating and pressurizing to plasticize and foam the prepressing material, wherein the pressure of a press is 30-35MPa, the steam pressure is 0.9MPa, and the heating time is 10-15min, and then cooling and demoulding to obtain a mould pressing foaming product;
s5, secondary foaming: placing the molded foaming product into hot water at the temperature of 90-95 ℃ for secondary foaming, wherein the secondary foaming time is 10-15 minutes, and obtaining a foaming plate;
s6, three-roller calendering and shaping: and (3) applying glue to the plant fiber layer, clamping the plant fiber layer between the two foaming plates, shaping by a three-roller calender, cooling and cutting to obtain the hard polyvinyl chloride foaming plate.
The outstanding substantive features and remarkable progress of the invention are as follows:
1. the rigid polyvinyl chloride foamed energy-saving plate is convenient to construct, uniform in microstructure, good in surface smoothness, high in yield, and excellent in compression strength, impact strength, hardness and thermal stability; high weather resistance, and can be used in high corrosion environment for a long time; by adding the composite heat stabilizer, the composite foaming agent and the nucleating agent, the special internal microporous structure of the foaming plate has sound insulation function for external noise interference such as rainstorm, strong wind and the like, and the sound absorption and noise reduction reach 40 dB; the flame retardance is good, the SGS test (UL 94) is V0 grade, and the GB national standard fire resistance is B1 grade; the product has the advantages of no deformation due to expansion and contraction, high toughness, wind resistance and no cracking; the environment-friendly flame retardant plastic can replace wood and metal, has excellent performance, no pollution, low energy consumption, high added value and wide application range, is normally used at the environment temperature of-50-80 ℃, and is widely applied to the fields of building materials, decorative materials, traffic noise reduction and the like.
2. The invention adds the sugarcane fiber layer, enhances the heat insulation and sound insulation performance, can change waste into valuable, greatly reduces the cost, improves the economic benefit, provides a new idea for the comprehensive utilization of the byproduct bagasse in agricultural processing, and provides a new application for the bagasse.
3. The addition of the composite heat stabilizer can improve the density, hardness, strength, flame retardance and micro morphology of the rigid polyvinyl chloride foamed energy-saving plate and the coloring performance of the foamed energy-saving plate; the active nano calcium carbonate can enhance the strength of the foaming energy-saving plate; the dichloromethane and dibutyl phthalate can improve the demolding speed and the microscopic appearance of the foaming material.
4. The acrylic ester modifier is added, so that the gelation of PVC can be promoted, the thermal strength and extensibility of a melt are obviously improved, the surface quality of a product is improved, fine cells formed by the foaming agent are stable, the cells are not broken and penetrate mutually to form holes, the foaming effect is improved, and the processing speed is increased.
Detailed Description
The present invention will be described below with reference to examples.
Example 1
Foaming board raw materials (by weight portion):
80 parts of PVC resin, 5 parts of active pyrophyllite, 6 parts of acrylate modifier, 5 parts of dichloromethane, 4 parts of dibutyl phthalate, 1 part of composite heat stabilizer, 2 parts of composite foaming agent, 0.1 part of lubricant and 1 part of nucleating agent.
The preparation method comprises the following steps:
s1, grinding: putting the PVC resin, the active pyrophyllite and the composite heat stabilizer into a ball-milling mixer according to the formula ratio, and grinding for 1 hour to obtain a mixture;
s2, high-speed hot mixing: adding the acrylate modifier, dichloromethane, dibutyl phthalate, the composite foaming agent, the lubricant and the nucleating agent into the mixture according to the formula ratio, and then sending the mixture into a high-speed thermal mixing stirrer for stirring for 30-40 minutes at the stirring speed of 40-50r/min and the thermal mixing temperature of 125-130 ℃;
s3, low-speed cold mixing: putting the mixture after hot mixing into a high-speed cold mixing stirrer for stirring for 45-55 minutes at a stirring speed of 70-80r/min and at a cold mixing temperature of 35-40 ℃ to obtain a pre-pressing material;
s4, mould pressing and foaming: adding the prepressing material into a mould, heating and pressurizing to plasticize and foam the prepressing material, wherein the pressure of a press is 30-35MPa, the steam pressure is 0.9MPa, and the heating time is 10-15min, and then cooling and demoulding to obtain a mould pressing foaming product;
s5, secondary foaming: placing the molded foaming product into hot water at the temperature of 90-95 ℃ for secondary foaming, wherein the secondary foaming time is 10-15 minutes, and obtaining a foaming plate;
s6, three-roller calendering and shaping: and (3) applying glue to the plant fiber layer, clamping the plant fiber layer between the two foaming plates, shaping by a three-roller calender, cooling and cutting to obtain the hard polyvinyl chloride foaming plate.
Example 2
Foaming board raw materials (by weight portion):
90 parts of PVC resin, 6 parts of active pyrophyllite, 8 parts of acrylate modifier, 10 parts of dichloromethane, 5 parts of dibutyl phthalate, 2 parts of composite heat stabilizer, 3 parts of composite foaming agent, 0.5 part of lubricant and 2 parts of nucleating agent.
The preparation method of the rigid polyvinyl chloride foamed energy-saving board is the same as that of the embodiment 1.
Example 3
Foaming board raw materials (by weight portion):
95 parts of PVC resin, 8 parts of active pyrophyllite, 10 parts of acrylate modifier, 15 parts of dichloromethane, 6 parts of dibutyl phthalate, 3 parts of composite heat stabilizer, 4 parts of composite foaming agent, 0.8 part of lubricant and 2.5 parts of nucleating agent.
The preparation method of the rigid polyvinyl chloride foamed energy-saving board is the same as that of the embodiment 1.
Example 4
Foaming board raw materials (by weight portion):
100 parts of PVC resin, 10 parts of active pyrophyllite, 12 parts of acrylate modifier, 20 parts of dichloromethane, 8 parts of dibutyl phthalate, 4 parts of composite heat stabilizer, 5 parts of composite foaming agent, 1 part of lubricant and 3 parts of nucleating agent.
The preparation method of the rigid polyvinyl chloride foamed energy-saving board is the same as that of the embodiment 1.
Test effects
The performance parameters of the hard polyvinyl chloride foamed energy-saving plate in the embodiments 1 to 4 of the invention are as follows:
the main technical indexes of the invention are as follows:
Figure DEST_PATH_IMAGE001
as can be seen from the above table, the rigid PVC foam energy-saving board of the invention has excellent flame retardance, aging resistance, compressive strength, tensile strength, environmental protection, hardness, heat insulation and sound insulation.

Claims (3)

1. The hard polyvinyl chloride foaming energy-saving board is characterized by comprising a foaming board and a plant fiber layer arranged in the middle of the foaming board, wherein the foaming board comprises the following raw materials in parts by weight: 80-100 parts of PVC resin, 5-10 parts of active pyrophyllite, 6-12 parts of acrylate modifier, 5-20 parts of dichloromethane, 4-8 parts of dibutyl phthalate, 1-4 parts of composite heat stabilizer, 2-5 parts of composite foaming agent, 0.1-1 part of lubricant and 1-3 parts of nucleating agent;
the plant fiber layer is a sugarcane fiber layer, and the preparation method of the sugarcane fiber layer comprises the following steps:
a. crushing bagasse, which is a byproduct generated in the sugar production process of sugarcane, in water, softening and filtering, soaking the obtained filter residue in a treatment solution for 3-4 hours at the soaking temperature of 30-45 ℃, performing acid neutralization and ultrasonic cleaning on the treated bagasse, drying until the moisture content is less than 5%, then crushing in a crusher to obtain 300-mesh 500-mesh sugarcane fiber,
b. sizing the crushed sugarcane fibers, feeding the sugarcane fibers subjected to sizing into a spreading machine, spreading the sugarcane fibers into a sugarcane fiber blank layer, feeding the sugarcane fiber blank layer into a prepress for prepressing, and feeding the sugarcane fiber blank layer subjected to prepressing into a hot press for hot press molding to obtain a sugarcane fiber layer;
the prepressing temperature is 160-;
the preparation method of the active pyrophyllite comprises the following steps: putting the pyrophyllite powder and the titanate coupling agent into a vibrating machine according to the mass ratio of 100:0.5-1 for grinding for 40-50 minutes, wherein the granularity of the ground pyrophyllite is 5-15um, and obtaining the active pyrophyllite;
the composite heat stabilizer is prepared from zinc glycerolate, calcium stearate, pentaerythritol, epoxidized soybean oil and an antioxidant; the mass ratio of the zinc glycerolate to the calcium stearate to the pentaerythritol to the epoxidized soybean oil to the antioxidant is 1-1.5:2:1:0.5: 0.3;
the preparation method of the rigid polyvinyl chloride foamed energy-saving plate comprises the following steps:
s1, grinding: putting the PVC resin, the active pyrophyllite and the composite heat stabilizer into a ball-milling mixer according to the formula ratio, and grinding for 1 hour to obtain a mixture;
s2, high-speed hot mixing: adding the acrylate modifier, dichloromethane, dibutyl phthalate, the composite foaming agent, the lubricant and the nucleating agent into the mixture according to the formula ratio, and then sending the mixture into a high-speed thermal mixing stirrer for stirring for 30-40 minutes at the stirring speed of 40-50r/min and the thermal mixing temperature of 125-130 ℃;
s3, low-speed cold mixing: putting the mixture after hot mixing into a high-speed cold mixing stirrer for stirring for 45-55 minutes at a stirring speed of 70-80r/min and at a cold mixing temperature of 35-40 ℃ to obtain a pre-pressing material;
s4, mould pressing and foaming: adding the prepressing material into a mould, heating and pressurizing to plasticize and foam the prepressing material, wherein the pressure of a press is 30-35MPa, the steam pressure is 0.9MPa, and the heating time is 10-15min, and then cooling and demoulding to obtain a mould pressing foaming product;
s5, secondary foaming: placing the molded foaming product into hot water at the temperature of 90-95 ℃ for secondary foaming, wherein the secondary foaming time is 10-15 minutes, and obtaining a foaming plate;
s6, three-roller calendering and shaping: the plant fiber layer is glued and clamped between two foaming plates, is shaped by a three-roller calender, and is cooled and cut to obtain the rigid polyvinyl chloride foaming plate;
the composite foaming agent is prepared from azodicarbonamide, uric acid, zinc carbonate and sodium bicarbonate; the mass ratio of the azodicarbonamide to the uric acid to the zinc carbonate to the sodium bicarbonate is 4:1:1: 4;
the lubricant is prepared from ethylene bis stearamide, a polymerizable borate surfactant and glyceryl monostearate; the mass ratio of the ethylene bis stearamide to the polymerizable borate surfactant to the stearic acid monoglyceride is 1:2: 10.
2. The rigid polyvinyl chloride foamed energy-saving board of claim 1, wherein: the treatment solution is NaOH and H2O2The mixed aqueous solution of (1), wherein the final concentration of NaOH in the mixed aqueous solution is 2% -4%, H2O2The final concentration in the mixed water solution is 1 to 2%。
3. The rigid polyvinyl chloride foamed energy-saving board of claim 1, wherein: the nucleating agent is active nano calcium carbonate.
CN201810349120.0A 2018-04-18 2018-04-18 Hard polyvinyl chloride foamed energy-saving board Expired - Fee Related CN108705833B (en)

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