CA2231811A1 - Method at the manufacturing of a recyclable product material - Google Patents
Method at the manufacturing of a recyclable product material Download PDFInfo
- Publication number
- CA2231811A1 CA2231811A1 CA 2231811 CA2231811A CA2231811A1 CA 2231811 A1 CA2231811 A1 CA 2231811A1 CA 2231811 CA2231811 CA 2231811 CA 2231811 A CA2231811 A CA 2231811A CA 2231811 A1 CA2231811 A1 CA 2231811A1
- Authority
- CA
- Canada
- Prior art keywords
- fibre
- product material
- matrix
- materials
- moduli
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Reinforced Plastic Materials (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Processing Of Solid Wastes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a method for the manufacture of a recyclable product material in order to achieve a predetermined strength within a predetermined strain rate interval. The product material comprises at least one matrix material and at least one fibre material. The matrix and fibre materials are chosen so that the values of their moduli of elasticity (Eij), moduli in shear (Gij) and the Poisson's ratios (ij) assume a discontinuous distribution of the said matrix and fibre material quantities within different volume elements of the product material. It is further intended that a display curve defining a continuous distribution of a fibre size of the product material should exhibit symmetry in different volume elements of the product material.
Description
Method at the manufacturing of a recyclable product materia The present invention relates to a method for the manufacture of a recyclable product material, comprising at least one matrix material and at least one fibre material in order to achieve a predetermined strength within a predetermined strain rate interval 5 in the product material.
Only recently has the handling of retumable plastic for recycling the latter assumed the priority which is desirable with regard, among other things, to environmental aspects, economic use of energy etc. People have begun, with some success, for 10 example~ to collect packaging film from agriculture and industry in order to manufacture granulate from the re~umed film WO 93/25609 and WO 94/09959. for example, are already known in this field.
These publications describe methods and appliances for recycling retumable plastic 1 ~ and fibres.
One problem with this is the degree of contamination and the large number of different types of plastic with different melt indices exhibited by the retumable plastic. as a result of which the manufactured product material does not achieve the 20 predeterrnined strength. The problem is related to the fact that the granulate nozzle and filtering equipment become clogged, which gives a very inhomogeneous final product.
In the above-mentioned publications there was no indication of any solution to this 2 5 strength problem.
The object of the present invention is to achieve a predetermined strength for apredetermined strain rate interval in a recyclable product material of the said type, in order to thereby eliminate or a~ least reduce the effect of the said disadvantages 30 associated with earlier manufaclure of recyclable produc( material. To do this it is necessary to produce the ~reatest internal microstresses possible in the product 3~ PCT/SE96/01124 material. This is achieved according to the invention in that in different volume elements of the product material the matrix and flbre materials are selected so thal the values for their moduli of elas~icity, shear moduli and Poisson's ratios assurne a discontim~ous distribution, and that a continuous distribution of a display curve 5 defining the fibre size of the product material exhibits syrnmetry.
According to another special characteristic of the invention the form factor of the fibre material/the mixed fibre materials, that is the ratio of fibre length to fibre diameter, exhibits a dispersion by means of which a majority of fibres can be made to 10 bridge islands of inhomogeneities which would otherwise give rise to defective adhesion bet~veen the fibres.
As will be appreciated from a further special characteristic of the invention, the said distributions are preferably so great that the fact that one or more of the matrixlfibre 15 materials is contaminated does not have a detrimental effect on the strength of the product material.
According to further characteristics of the invention the respective forrn factors of the said fibre material are such that the particle size of the contaminations is exceeded, 20 that is to say the fact one or more of the matrix/fibre materials is contaminated does not have a detrimental effect on the strength of the product material.
Further advantages of the invention will be evident from the following description of this, referring to the drawing in which fig. I is an example of a display curve in the 25 method accordinP to the invention. Fig.2 shows various volume elements in a product material.
The manufacture of a recyclable product material by the method according to the invention is done using equipment of conventional type familiar to the person skilled 30 in the art supplemented by measuring devices for checking the moduli of elasticity and moduli in shear of the matrix and flbre materials, together with the Poisson's ratios calculated from these values. Should the discontinuous distribution of the above-mentioned quantitles characteristic of the invention not be obtained, a manual or automatic correction is pertorrned, whereupon that material in which the quantities did not attain the discontinuous distribution is fed back into the process, that is to say the material passes through the process one more time.
With regard to the display curve defining the fibre size of the product material, reference is made to the example in fig. l . In this display curve it is assumed that the agglomeratelgranulate has a maximum diarneter of 4mm. The majority of the fibreshave here been chosen with lengths of about 2mm with a dispersion according to the 1 0 curve.
Fig.2 is intended to show a specimen l of a recyclable product material manufactured by the method according to the invention. Agglomerate/granulate have been combined as N volume elements lal, la2 ... with different preferred alignments of 15 the fibres, which are included in the various volurne elements. This consequently means, according to the invention, that for each such volume element the values of the modulus of elasticity (Ejj), the modulus in shear (Gjj) and the Poisson's ratio (o jj) will differ from the values of similar quantities for adjacent volume elements. This confers great intemal couple stresses.
Only recently has the handling of retumable plastic for recycling the latter assumed the priority which is desirable with regard, among other things, to environmental aspects, economic use of energy etc. People have begun, with some success, for 10 example~ to collect packaging film from agriculture and industry in order to manufacture granulate from the re~umed film WO 93/25609 and WO 94/09959. for example, are already known in this field.
These publications describe methods and appliances for recycling retumable plastic 1 ~ and fibres.
One problem with this is the degree of contamination and the large number of different types of plastic with different melt indices exhibited by the retumable plastic. as a result of which the manufactured product material does not achieve the 20 predeterrnined strength. The problem is related to the fact that the granulate nozzle and filtering equipment become clogged, which gives a very inhomogeneous final product.
In the above-mentioned publications there was no indication of any solution to this 2 5 strength problem.
The object of the present invention is to achieve a predetermined strength for apredetermined strain rate interval in a recyclable product material of the said type, in order to thereby eliminate or a~ least reduce the effect of the said disadvantages 30 associated with earlier manufaclure of recyclable produc( material. To do this it is necessary to produce the ~reatest internal microstresses possible in the product 3~ PCT/SE96/01124 material. This is achieved according to the invention in that in different volume elements of the product material the matrix and flbre materials are selected so thal the values for their moduli of elas~icity, shear moduli and Poisson's ratios assurne a discontim~ous distribution, and that a continuous distribution of a display curve 5 defining the fibre size of the product material exhibits syrnmetry.
According to another special characteristic of the invention the form factor of the fibre material/the mixed fibre materials, that is the ratio of fibre length to fibre diameter, exhibits a dispersion by means of which a majority of fibres can be made to 10 bridge islands of inhomogeneities which would otherwise give rise to defective adhesion bet~veen the fibres.
As will be appreciated from a further special characteristic of the invention, the said distributions are preferably so great that the fact that one or more of the matrixlfibre 15 materials is contaminated does not have a detrimental effect on the strength of the product material.
According to further characteristics of the invention the respective forrn factors of the said fibre material are such that the particle size of the contaminations is exceeded, 20 that is to say the fact one or more of the matrix/fibre materials is contaminated does not have a detrimental effect on the strength of the product material.
Further advantages of the invention will be evident from the following description of this, referring to the drawing in which fig. I is an example of a display curve in the 25 method accordinP to the invention. Fig.2 shows various volume elements in a product material.
The manufacture of a recyclable product material by the method according to the invention is done using equipment of conventional type familiar to the person skilled 30 in the art supplemented by measuring devices for checking the moduli of elasticity and moduli in shear of the matrix and flbre materials, together with the Poisson's ratios calculated from these values. Should the discontinuous distribution of the above-mentioned quantitles characteristic of the invention not be obtained, a manual or automatic correction is pertorrned, whereupon that material in which the quantities did not attain the discontinuous distribution is fed back into the process, that is to say the material passes through the process one more time.
With regard to the display curve defining the fibre size of the product material, reference is made to the example in fig. l . In this display curve it is assumed that the agglomeratelgranulate has a maximum diarneter of 4mm. The majority of the fibreshave here been chosen with lengths of about 2mm with a dispersion according to the 1 0 curve.
Fig.2 is intended to show a specimen l of a recyclable product material manufactured by the method according to the invention. Agglomerate/granulate have been combined as N volume elements lal, la2 ... with different preferred alignments of 15 the fibres, which are included in the various volurne elements. This consequently means, according to the invention, that for each such volume element the values of the modulus of elasticity (Ejj), the modulus in shear (Gjj) and the Poisson's ratio (o jj) will differ from the values of similar quantities for adjacent volume elements. This confers great intemal couple stresses.
Claims (4)
1. Method for the manufacture of a recyclable product material, comprising at least one matrix material and at least one fibre material in order to achieve a predetermined strength within a predetermined strain rate interval in the product material, characterised in that in different volume elements of the product material the matrix and fibre materials are selected in such a way that the values of their moduli of elasticity (Eij), the moduli in shear (Gij) and the Poisson's ratios (Oij) assume a discontinuous distribution and that a display curve defining a continuous distribution of fibre size of the product material exhibits symmetry.
2. Method according to claim 1, characterised in that through the choice of a fibre material or mixture of at least two fibre materials it is ensured that the display curve of the fibre material/the mixed fibre materials is approximately symmetrical about a predetermined mean value.
3. Method according to claim 1, characterised in that the form factor of the fibre material/the mixed fibre materials, that is the ratio of fibre length to fibre diameter, exhibits dispersion.
4. Method according to claim 3, characterised in that the respective form factors of the said fibre materials are such that the particle size of the contaminations is exceeded, that is to say that the fact that one or more of the matrix/fibre materials is contaminated does not have a detrimental effect on the strength of the product material.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9503190-2 | 1995-09-14 | ||
| SE9503190A SE504882C2 (en) | 1995-09-14 | 1995-09-14 | Method of producing a recyclable product material |
| PCT/SE1996/001124 WO1997010935A1 (en) | 1995-09-14 | 1996-09-10 | Method at the manufacturing of a recyclable product material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2231811A1 true CA2231811A1 (en) | 1997-03-27 |
Family
ID=20399487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2231811 Abandoned CA2231811A1 (en) | 1995-09-14 | 1996-09-10 | Method at the manufacturing of a recyclable product material |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0969954A2 (en) |
| JP (1) | JP2000500167A (en) |
| AU (1) | AU700632B2 (en) |
| CA (1) | CA2231811A1 (en) |
| NO (1) | NO981060D0 (en) |
| PL (1) | PL325465A1 (en) |
| SE (1) | SE504882C2 (en) |
| WO (1) | WO1997010935A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11360130B2 (en) | 2019-06-20 | 2022-06-14 | Schneider Electric USA, Inc. | Distributed electrical energy meter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL105950A0 (en) * | 1992-06-09 | 1993-10-20 | Baker Richard D | Recycled fibre reinforced resin containing product and method and apparatus therefor |
| DE4236446A1 (en) * | 1992-10-28 | 1994-05-05 | Herfeld Gmbh & Co Kg Dr | Process for the production of a recyclable agglomerate from plastic waste |
-
1995
- 1995-09-14 SE SE9503190A patent/SE504882C2/en not_active IP Right Cessation
-
1996
- 1996-09-10 EP EP19960931324 patent/EP0969954A2/en not_active Withdrawn
- 1996-09-10 PL PL32546596A patent/PL325465A1/en unknown
- 1996-09-10 AU AU70038/96A patent/AU700632B2/en not_active Ceased
- 1996-09-10 JP JP51222297A patent/JP2000500167A/en active Pending
- 1996-09-10 CA CA 2231811 patent/CA2231811A1/en not_active Abandoned
- 1996-09-10 WO PCT/SE1996/001124 patent/WO1997010935A1/en not_active Application Discontinuation
-
1998
- 1998-03-11 NO NO981060A patent/NO981060D0/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000500167A (en) | 2000-01-11 |
| EP0969954A2 (en) | 2000-01-12 |
| AU7003896A (en) | 1997-04-09 |
| SE9503190D0 (en) | 1995-09-14 |
| SE9503190L (en) | 1997-03-15 |
| AU700632B2 (en) | 1999-01-07 |
| SE504882C2 (en) | 1997-05-20 |
| PL325465A1 (en) | 1998-07-20 |
| NO981060L (en) | 1998-03-11 |
| NO981060D0 (en) | 1998-03-11 |
| WO1997010935A1 (en) | 1997-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1169619A (en) | Lustrous satin appearing, opaque film compositions and method of preparing same | |
| Batch et al. | Compaction of fiber reinforcements | |
| US3664909A (en) | Needled resin fibrous article | |
| US4997693A (en) | Fiber-reinforced resin material and fiber-reinforced resin laminate using it as base material | |
| US4547421A (en) | Highly dispersed continuous glass fiber mats | |
| US3595738A (en) | Helically crimped filamentary materials | |
| Carmona et al. | Anisotropic electrical conductivity in heterogeneous solids with cylindrical conducting inclusions | |
| CA2231811A1 (en) | Method at the manufacturing of a recyclable product material | |
| EP0360430A3 (en) | Molding material | |
| CA2166336A1 (en) | Glass fiber containing polymer sheet and process for preparing same | |
| AU612354B2 (en) | Composite strand containing metal fibers and plastic articles made therefrom | |
| WO2000047657A3 (en) | Nanocomposite articles and process for making | |
| KR20050084583A (en) | Improved core material | |
| US3272645A (en) | Moldable laminated sheet materials and method of making same | |
| JPH0617363A (en) | Method for manufacturing molded item by compression-molding of textile material by simultaneous adhesion and its molded item | |
| JPH03151012A (en) | Adsorptive filter | |
| US20030215633A1 (en) | Fiber glass product incorporating string binders | |
| Mallick | Effect of fiber misorientation on the tensile strength of compression molded continuous fiber composites | |
| Yang et al. | Study of the effect of regrinding on the cumulative damage to the mechanical properties of fiber‐reinforced nylon 66 | |
| JP2006512501A5 (en) | ||
| JPS6177802A (en) | Molding for light diffusion and transmission | |
| JPS6321118A (en) | Reinforced reaction injection molding | |
| CA2115986A1 (en) | Granules of fiber-reinforced thermoplastic | |
| JP3299586B2 (en) | Molding method using resin molding material | |
| DE69606199T2 (en) | METHOD AND DEVICE FOR PRODUCING A FILM WITH GRANULAR MATERIAL THEREOF |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |