WO2002051607A1 - Formed goods using waste rubber and method for manufacturing the same - Google Patents

Formed goods using waste rubber and method for manufacturing the same Download PDF

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Publication number
WO2002051607A1
WO2002051607A1 PCT/KR2001/001290 KR0101290W WO02051607A1 WO 2002051607 A1 WO2002051607 A1 WO 2002051607A1 KR 0101290 W KR0101290 W KR 0101290W WO 02051607 A1 WO02051607 A1 WO 02051607A1
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Prior art keywords
parts
weight
goods
waste rubber
waste
Prior art date
Application number
PCT/KR2001/001290
Other languages
French (fr)
Inventor
Jin Kuk Kim
Original Assignee
Jin Kuk Kim
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jin Kuk Kim filed Critical Jin Kuk Kim
Publication of WO2002051607A1 publication Critical patent/WO2002051607A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/01—Hydrocarbons
    • 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
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the present invention relates to goods recycled from waste rubber and a method for manufacturing the same, and more particularly to technology for manufacturing rubber products formed by using powdered scrap rubber from the rubber industry.
  • Waste tires which are now generated in large quantities, have been used as a source from which a variety of goods can be molded.
  • adhesives have been used in manufacturing waste tires into goods.
  • they are insufficiently competitive in terms of production cost because the > adhesives added to vulcanized waste tire powder are expensive.
  • Much effort has been made to avoid the problems.
  • Korean Pat. Laid-Open Publication No.97-027524 which discloses the manufacture of rubber blocks from waste tires by use of latex
  • Korean Pat. Appl'n No. 98-63410 which introduces the use of DEG in molding waste tires with the aim of improving commercial values of the goods .
  • the present inventors have conducted extensive studies into the treatment and uses of scrap rubber produced by the rubber industry, reaching the conclusion that a combination of additives, including process oil, a vulcanizing accelerant, and a vulcanizing agent, can bring about an improvement in physical properties of the goods molded from waste tires.
  • a method for manufacturing rubber goods from waste rubber powder comprising the steps of: admixing 10 ⁇ 20 ml of a process oil, 2 ⁇ 3 parts by weight of a vulcanizing accelerant, 5 ⁇ 10 parts by weight of a vulcanizing agent, 0 ⁇ 15 parts by weight of a pine resin with 100 parts by weight of a waste rubber powder; uniformly homogenizing the admixture; melting the admixture at 150 to 170°C in a mold; and molding the melt into goods.
  • a composition of recycled goods comprising 100 parts by weight of waste rubber powder, 10 to 20 ml of a process oil, 2 to 3 parts by weight of a vulcanizing accelerant, 5 to 10 parts by weight of a vulcanizing agent, and 0 to 15 parts by weight of a pine resin.
  • Fig. 1 is a histogram illustrating physical properties of waste tire-recycled goods according to kinds of additives.
  • Figs. 2 and 3 are histograms illustrating physical properties of waste rubber-recycled goods according to kinds of waste rubbers and process oils.
  • Figs. 4 and 5 are curves illustrating the change of physical properties of waste rubber-recycled goods with amounts of pine resin added to the goods .
  • the present invention pertains to recycling of waste rubber, which is generated in a large quantity in the rubber industry.
  • Useful in the present invention are rubber powders which comprises 0.1% or less of iron content, 0.1% or less of fiber powder content, 10% or less of ash content, 1.0% or less of moisture content, meeting the criteria of KSM 6710 rubber powder of the waste tire, Korean Industry Standard.
  • compositions of the waste tire powder used in the invention are as described in the following Table 1:
  • the present invention is characterized in that a combination of additives, including process oil, a vulcanizing accelerant, a vulcanizing agent, and optionally pine resin depending on necessary physical properties, is used, instead of adhesives, in molding goods from waste rubber powder.
  • the vulcanizing agent is preferably used in the amount of 5 to 10 parts by weight based on 100 parts by weight of the waste rubber powder.
  • the amount of vulcanizing agent may affect physical properties of the formed goods. For example, adding less than 5 parts by weight may give rise to no or poor vulcanization, whereas adding more than 10 parts by weight may give rise to excessive vulcanization.
  • TMTD Tetramethyl Thiuram Disulfide
  • the vulcanizing accelerant is used in the amount of 2 to 3 parts by weight based on 100 parts by weight of the waste rubber powder.
  • the vulcanizing accelerant is used in the amount less than 2 parts by weight, the vulcanizing time may be lengthened.
  • more than 3 parts by weight of the vulcanizing accelerant may cause an increase in the risk of scotching.
  • the process oil its use also characterizes the present invention.
  • Fig. 1 there are compared physical properties of goods which are recycled from waste tires by use of urethane adhesive, SBR latex, DEG and process oil.
  • the recycled goods by use of process oil are poorer in elongation, but better in tensile strength, compared to those using the other additives.
  • process oil has an economic advantage over the other additives.
  • the process oil can be selected from naphthanic and aromatic oils, depending on kinds of recycled rubber, as shown in Figs. 2 and 3.
  • the amount of the process oil may be 5 to 20 parts by weight based on 100 parts by weight of the used waste rubber powder. When the amount is not within this range, the resulting rubber goods have poor physical properties since mixing and forming cannot be easily accomplished.
  • pine resin may be used to improve the physical properties of the recycled goods, such as tensile strength, elongation at break, hardness, and tear strength.
  • these physical properties are plotted versus contents of pine resin.
  • the amount of the pine resin is determined depending on necessary physical properties and preferably falls within the range of 0 to 10 parts by weight based on 100 parts by weight of the waste rubber powder. Greater than 10 parts by weight of the pine resin makes the recycled goods poor in physical properties .
  • EXAMPLE 2 10 ⁇ 20 ml of a process oil, 2 ⁇ 3 parts by weight of a vulcanizing accelerant, 5 ⁇ 10 parts by weight of a vulcanizing agent, and 5 ⁇ 15 parts by weight of a pine resin were admixed with 100 parts by weight of a waste rubber powder, followed by uniformly homogenizing the admixture. After being melted at 150 to 170 °C in a mold, the mixture was molded to goods with the aid of an ordinary process and apparatus .
  • the goods of the present invention were found to have a tensile strength of 44 kgf/cm 2 , an elongation at break of about 110%, and a hardness of 84 of hardness. Low as they are in elongation at break, the recycled goods of the present invention are better in terms of tensile strength than those using DEG.
  • recycled goods of the present invention were measured to be generally superior in physical properties compared to those using latex (tensile strength 32kgf/cm 2 , elongation at break 180%, hardness 80) .
  • the rubber goods of the present invention have economic advantages, even though being poor in physical properties in comparison with the conventional goods (tensile strength 70 kgf/cm 2 , elongation at break 200%, and hardness 76) .
  • materials for conventional rubber goods are limited to waste tires
  • the present invention is applicable to waste rubber as well as waste tires.
  • the improved physical properties make the recycled goods have applications in a broad spectrum of fields.
  • the present invention saves production expenses by 7/20-9/20 of expenses of conventional adhesive case.

Abstract

Disclosed are rubber goods recycled from waste rubber powder and a method for manufacturing the same. Instead of expensive adhesive, a homogenized admixture comprising 15&≈25 parts by weight of a process oil, 2≈3 parts by weight of a vulcanizing accelerant, 5≈10 parts by weight of the vulcanizing agent, and 0&≈15 parts by weight of a pine resin is used based on 100 parts by weight of the waste rubber powder. Being economically favorable, the molded goods can promote the recycling of waste rubber.

Description

FORMED GOODS USING WASTE RUBBER AND METHOD FOR MANUFACTURING
THE SAME
BACKGROUND OF THE INVENTION
1. Field of the invention
The present invention relates to goods recycled from waste rubber and a method for manufacturing the same, and more particularly to technology for manufacturing rubber products formed by using powdered scrap rubber from the rubber industry.
2. Description of the Prior Art
Waste tires, which are now generated in large quantities, have been used as a source from which a variety of goods can be molded. Conventionally, adhesives have been used in manufacturing waste tires into goods. However, they are insufficiently competitive in terms of production cost because the > adhesives added to vulcanized waste tire powder are expensive. Much effort has been made to avoid the problems. For example, reference may be made to the patents which have been made by the applicant of the present invention, Korean Pat. Laid-Open Publication No.97-027524, which discloses the manufacture of rubber blocks from waste tires by use of latex, and Korean Pat. Appl'n No. 98-63410, which introduces the use of DEG in molding waste tires with the aim of improving commercial values of the goods .
However, physical properties of the molded goods made by use of latex or DEG are poorer than those of the molded goods using the adhesive, as shown in Fig.l. Therefore, there remains a need for improving physical properties of the goods molded from waste tires with maintenance of a low production cost.
SUMMARY OF THE INVENTION
The present inventors have conducted extensive studies into the treatment and uses of scrap rubber produced by the rubber industry, reaching the conclusion that a combination of additives, including process oil, a vulcanizing accelerant, and a vulcanizing agent, can bring about an improvement in physical properties of the goods molded from waste tires.
Therefore, it is an object of the present invention to provide goods molded from waste tires, which can be produced at a low production cost with high physical properties.
It is another object of the present invention to provide a method for manufacturing such goods recycled from waste tires . In accordance with an aspect of the present invention, there is provided a method for manufacturing rubber goods from waste rubber powder, comprising the steps of: admixing 10~20 ml of a process oil, 2~3 parts by weight of a vulcanizing accelerant, 5~10 parts by weight of a vulcanizing agent, 0~15 parts by weight of a pine resin with 100 parts by weight of a waste rubber powder; uniformly homogenizing the admixture; melting the admixture at 150 to 170°C in a mold; and molding the melt into goods.
In accordance with another aspect of the present invention, there is provided a composition of recycled goods, comprising 100 parts by weight of waste rubber powder, 10 to 20 ml of a process oil, 2 to 3 parts by weight of a vulcanizing accelerant, 5 to 10 parts by weight of a vulcanizing agent, and 0 to 15 parts by weight of a pine resin.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a histogram illustrating physical properties of waste tire-recycled goods according to kinds of additives. Figs. 2 and 3 are histograms illustrating physical properties of waste rubber-recycled goods according to kinds of waste rubbers and process oils.
Figs. 4 and 5 are curves illustrating the change of physical properties of waste rubber-recycled goods with amounts of pine resin added to the goods .
DETAILED DESCRIPTION OF THE INVENTION
The present invention pertains to recycling of waste rubber, which is generated in a large quantity in the rubber industry. Useful in the present invention are rubber powders which comprises 0.1% or less of iron content, 0.1% or less of fiber powder content, 10% or less of ash content, 1.0% or less of moisture content, meeting the criteria of KSM 6710 rubber powder of the waste tire, Korean Industry Standard.
Compositions of the waste tire powder used in the invention are as described in the following Table 1:
TABLE 1
Figure imgf000005_0001
Figure imgf000006_0001
The advantages of the invention will be apparent with reference to the accompanying drawings
The present invention is characterized in that a combination of additives, including process oil, a vulcanizing accelerant, a vulcanizing agent, and optionally pine resin depending on necessary physical properties, is used, instead of adhesives, in molding goods from waste rubber powder. Exemplified by sulfur in the present invention, the vulcanizing agent is preferably used in the amount of 5 to 10 parts by weight based on 100 parts by weight of the waste rubber powder. The amount of vulcanizing agent may affect physical properties of the formed goods. For example, adding less than 5 parts by weight may give rise to no or poor vulcanization, whereas adding more than 10 parts by weight may give rise to excessive vulcanization.
In the invention, it is preferred that TMTD (Tetramethyl Thiuram Disulfide) as the vulcanizing accelerant is used in the amount of 2 to 3 parts by weight based on 100 parts by weight of the waste rubber powder. For example, when the vulcanizing accelerant is used in the amount less than 2 parts by weight, the vulcanizing time may be lengthened. On the other hand, more than 3 parts by weight of the vulcanizing accelerant may cause an increase in the risk of scotching.
As for the process oil, its use also characterizes the present invention. With reference to Fig. 1, there are compared physical properties of goods which are recycled from waste tires by use of urethane adhesive, SBR latex, DEG and process oil. As shown in the histogram, the recycled goods by use of process oil are poorer in elongation, but better in tensile strength, compared to those using the other additives. Furthermore, process oil has an economic advantage over the other additives. The process oil can be selected from naphthanic and aromatic oils, depending on kinds of recycled rubber, as shown in Figs. 2 and 3. Preferably, the amount of the process oil may be 5 to 20 parts by weight based on 100 parts by weight of the used waste rubber powder. When the amount is not within this range, the resulting rubber goods have poor physical properties since mixing and forming cannot be easily accomplished.
Optionally, pine resin may be used to improve the physical properties of the recycled goods, such as tensile strength, elongation at break, hardness, and tear strength. With reference to Figs. 4 and 5, these physical properties are plotted versus contents of pine resin. As apparent from the curves, the amount of the pine resin is determined depending on necessary physical properties and preferably falls within the range of 0 to 10 parts by weight based on 100 parts by weight of the waste rubber powder. Greater than 10 parts by weight of the pine resin makes the recycled goods poor in physical properties .
A better understanding of the present invention may be obtained in light of the following examples which are set forth to illustrate, but are not to be construed to limit the present invention.
EXAMPLE 1
10~20 ml of a process oil, 2~3 parts by weight of a vulcanizing accelerant, and 5-10 parts by weight of a vulcanizing agent were admixed with 100 parts by weight of a waste rubber powder, followed by uniformly homogenizing the admixture. After being melted at 150 to 170 °C in a mold, the mixture was molded to goods with the aid of an ordinary process and apparatus.
EXAMPLE 2 10~20 ml of a process oil, 2~3 parts by weight of a vulcanizing accelerant, 5~10 parts by weight of a vulcanizing agent, and 5~15 parts by weight of a pine resin were admixed with 100 parts by weight of a waste rubber powder, followed by uniformly homogenizing the admixture. After being melted at 150 to 170 °C in a mold, the mixture was molded to goods with the aid of an ordinary process and apparatus .
A measurement was made of physical properties of goods (dumbbell type 3) manufactured from waste tire powder (particle size 900 μ ) by the molding process. The goods of the present invention were found to have a tensile strength of 44 kgf/cm2, an elongation at break of about 110%, and a hardness of 84 of hardness. Low as they are in elongation at break, the recycled goods of the present invention are better in terms of tensile strength than those using DEG. In addition, recycled goods of the present invention were measured to be generally superior in physical properties compared to those using latex (tensile strength 32kgf/cm2, elongation at break 180%, hardness 80) . Over the recycled rubber goods using urethane adhesive, the rubber goods of the present invention have economic advantages, even though being poor in physical properties in comparison with the conventional goods (tensile strength 70 kgf/cm2, elongation at break 200%, and hardness 76) . Whereas materials for conventional rubber goods are limited to waste tires, the present invention is applicable to waste rubber as well as waste tires. Moreover, the improved physical properties make the recycled goods have applications in a broad spectrum of fields. Furthermore, the present invention saves production expenses by 7/20-9/20 of expenses of conventional adhesive case.
The present invention has been described in an illustrative manner, and it is to be understood that the terminology used is intended to be in the nature of description rather than of limitation. Many modifications and variations of the present invention are possible in light of the above teachings. Therefore, it is to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.

Claims

What is claimed is:
1. A method for manufacturing rubber goods from waste rubber powder, comprising the steps of: admixing 10-20 ml of a process oil, 2-3 parts by weight of a vulcanizing accelerant, 5-10 parts by weight of a vulcanizing agent, 0~15 parts by weight of a pine resin with 100 parts by weight of a waste rubber powder; uniformly homogenizing the admixture; melting the admixture at 150 to 170°C in a mold; and molding the melt into goods .
2. A composition of recycled goods, comprising 100 parts by weight of waste rubber powder, 10 to 20 ml of a process oil, 2 to 3 parts by weight of a vulcanizing accelerant, 5 to 10 parts by weight of a vulcanizing agent, and 0 to 15 parts by weight of a pine resin.
PCT/KR2001/001290 2000-12-27 2001-07-31 Formed goods using waste rubber and method for manufacturing the same WO2002051607A1 (en)

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KR1020000083058A KR20010016611A (en) 2000-12-27 2000-12-27 The method for manufacturing of rubber using forming goods
KR2000/83058 2000-12-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010016611A (en) * 2000-12-27 2001-03-05 김진국 The method for manufacturing of rubber using forming goods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100903652B1 (en) * 2007-10-18 2009-06-18 김종문 Modified asphalt composition used in treated fine waste tire powder with the propylene wax

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244841A (en) * 1980-03-24 1981-01-13 Frankland Enterprises, Inc. Method for recycling rubber and recycled rubber product
KR940006738A (en) * 1992-09-05 1994-04-25 유박인 Manufacturing method of sidewalk block using waste tires or waste rubber
EP0657263A1 (en) * 1993-12-06 1995-06-14 Natrub (Barbados) Limited Process for regeneration of rubber
KR970027524A (en) * 1995-11-30 1997-06-24 김진국 Waste Tire Recycling Rubber Press Block
KR19980083974A (en) * 1997-05-20 1998-12-05 이용학 Manufacturing method of barast mat using waste tire powder
KR20000046694A (en) * 1998-12-31 2000-07-25 김진국 Rubber molded-article using waste tire powder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5598235A (en) * 1979-01-22 1980-07-26 Ikeda Hisashi Preparing reclaimed rubber using waste tire and product thereof
JPS5599938A (en) * 1979-01-27 1980-07-30 Kurashiki Kako Kk Preparation of molding rubber composition comprising vulcanized scrap rubber
US4504604A (en) * 1983-11-25 1985-03-12 The Goodyear Tire & Rubber Company Energy absorbing rubber composition
JPH05329842A (en) * 1992-06-02 1993-12-14 Marenori Oonishi Rubber product using waste tire as raw material
JP3304189B2 (en) * 1994-03-18 2002-07-22 マツダ株式会社 Molding rubber composition containing vulcanized scrap rubber and method for producing the same
KR20010016611A (en) * 2000-12-27 2001-03-05 김진국 The method for manufacturing of rubber using forming goods

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244841A (en) * 1980-03-24 1981-01-13 Frankland Enterprises, Inc. Method for recycling rubber and recycled rubber product
KR940006738A (en) * 1992-09-05 1994-04-25 유박인 Manufacturing method of sidewalk block using waste tires or waste rubber
EP0657263A1 (en) * 1993-12-06 1995-06-14 Natrub (Barbados) Limited Process for regeneration of rubber
KR970027524A (en) * 1995-11-30 1997-06-24 김진국 Waste Tire Recycling Rubber Press Block
KR19980083974A (en) * 1997-05-20 1998-12-05 이용학 Manufacturing method of barast mat using waste tire powder
KR20000046694A (en) * 1998-12-31 2000-07-25 김진국 Rubber molded-article using waste tire powder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010016611A (en) * 2000-12-27 2001-03-05 김진국 The method for manufacturing of rubber using forming goods

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