CAMPUS (database)

CAMPUS
Material information system for plastics
languages	English, French, German, Spanish, Italian, Japanese, Chinese, Korean
operator	CWFG mbH
On-line	1988
http://www.campusplastics.com/

CAMPUS ( English acronym for Computer Aided Material Preselection by Uniform Standards - computer- aided material preselection ) is a multilingual database for the properties of plastics . It is recognized worldwide as a leader in terms of the degree of standardization and thus comparability of the characteristic values ​​and the support of characteristic value diagrams . For this purpose, CAMPUS is based on ISO 10350 for one-point parameters such as B. density and ISO 11403 for diagrams, such as B. the stress-strain diagram .

history

Standardization activities

At the beginning of the 1980s, the European market for plastic molding compounds was very confusing. On the one hand, the number of types offered rose to 5,000 to 10,000, on the other hand, there were around 2500 DIN standards alone that dealt with plastics in the broadest sense. In addition, the specification of a standard is not sufficient to precisely define the test method and the manufacturing conditions for the test specimens also significantly influence the result. At the same time, personal computers had been available at low cost since the early 1980s and were also used to create a wide variety of data collections. For many users, processors and raw material manufacturers, this happened at the same time and initially completely uncoordinated. Thus the problem of the comparability of the data arose.

Preferred specimen geometries in CAMPUS

For the reasons mentioned, in 1984 the DIN Standards Committee for Plastics (DIN-FNK) began to work out a list of preferred test methods (so-called basic values catalog) , which should meet the following boundary conditions:

• Definition of the most important manufacturing conditions for a small number of test specimen shapes
• Selection of meaningful test methods with potential for international harmonization

At the international level, the proposal was further developed in ISO TC61 / SC1 / WG4 with significant contributions from Great Britain and France (so-called Tripartite Forum ) and adopted in 1990 as ISO 10350 and ISO 11403. In the years that followed, the standards were revised several times, most recently in 2018.

The beginnings of the CAMPUS software

At the beginning of 1987, on the sidelines of a meeting of the working group for the standardization of test procedures, the idea was expressed for the first time to help the catalog of basic values ​​achieve general recognition, in which several plastics manufacturers develop a uniform database. The idea was discussed within the companies BASF , Bayer , Hoechst and Hüls and a number of other advantages were found:

• Fulfill customer demand for data comparability
• Replace the variety of brochures and data sheets with a database
• faster update possible
• simplified pre-selection of suitable plastics (search function)
• Setting a standard, also for other manufacturers

In March 1987, experts from the four companies met for the first time to define the requirements for the database to be developed in more detail:

• easy access: at the time this meant a PC application distributed on floppy disk
• Simple operation: self-explanatory menus and a help system, standardized for all manufacturers
• separate databases: each manufacturer is responsible for data maintenance
• low costs: an important argument against a central database at the time
• broad applicability: IBM-compatible PCs did this best; Multilingualism is sought
• Easy updatability: floppy disks could be updated once or twice a year, which was an improvement on the brochure solution with an interval of several years. However, it has already been seen that the central database would outperform the floppy disk solution on this point.

In further meetings, a specification was drawn up and the naming was discussed. Finally, an agreement was reached on the acronym CAMPUS (Computer Aided Material Preselection by Uniform Standards), whereby preselection should emphasize that component tests are required for the final material selection in addition to test object-related data in most cases . The programming was commissioned and the result, version CAMPUS 1.2, was presented to the public at a press conference on February 23, 1988 at a VDI -K conference. It was also announced that in addition to the four founders, all other plastics manufacturers will also acquire licenses and thus make their data corresponding to the basic values ​​catalog available to customers. The license includes the obligation to publish the characteristic values ​​determined strictly according to the basic values ​​catalog and the test standards cited therein and is issued by the Chemie Wirtschaftsförderungs Gesellschaft mbH (CWFG).

version	publication	Remarks
1.2	02/23/1988	First version; text based
2.0	1990	Graphic for curves
3.0	1994	DOS menus and mouse control, new data format
4.0	1996	Porting to MS Windows
4.1	1998	further physical multipoint data
4.5	2001	Addition to chemical resistance and TPEs
5.0	2004	Multiple base polymers; WebUpdate function
5.1	2007	Additive labeling, heat aging
5.2	2010	Data sheet according to VDA guideline 232-201

Overview of the version history of the CAMPUS software

Further software development

Version 2 and 3

The response to CAMPUS in the professional world was very positive from the start and enabled the system to be spread and further developed quickly. As early as autumn 1989, a prototype of version 2.0 was presented at the plastics trade fair K'89, which was delivered from around mid-1990 and, in addition to improved operation, the options for additional one-point parameters for rheological and thermal calculation programs, for the first time the representation of functional dependencies of properties as a diagram , for example in viscosity curves and temperature-dependent tensile test curves . Due to the limited storage space, a concept was introduced in which only a few support points have to be saved for these curves , from which the curve can be calculated with a spline function while the screen is displayed. By August 1990, 22 European plastics manufacturers had already licensed the new system, 14 of which were offering their own diskettes.

Version 3.0 was a new development with a changed data structure. On the one hand, it offered significantly more ease of use (menu bars with mouse control, search profile, abbreviations , curve overlay, Postscript printing, configuration storage) through the use of modern hardware, as well as a partially changed catalog of basic values ​​following further developments in standardization. The product texts were expanded and the units could now also be switched between the SI and the US system. With this version the globalization of CAMPUS began, because DuPont and Dow Chemical from the USA have now joined the exclusively European manufacturers .

Version 4

In the Asian region, significant development activities began in 1995. The response was particularly strong in Japan . However, the NEC-DOS , which was widespread in Japan at the time, did not allow direct porting and, conversely, the CAMPUS software did not allow the Kanji to be displayed . This was the decisive factor in the overdue development of a Windows version (4.0). Another important innovation in version 4 was the introduction of processing instructions. Since there is still no normative basis for this, the text information is given separately for each molding compound and also translated into all language versions. In version 4.1, DSC curves and pvT data have been added.

In 1998 the CAMPUS website started under the address campusplastics.com , later campus.us was added. From then on there was a central point of contact for obtaining the data that had to be requested individually from each participant beforehand. Within a short period of time, all data stocks were available for download and also allowed a much faster update. At around the same time, the licensed MCBase came onto the market. It allows the databases of different manufacturers to be summarized and thus enables comprehensive searches and direct material comparison in tables and graphics. An export interface is also part of this software , especially for CAE applications.

The next milestone in CAMPUS development was the inclusion of data on chemical resistance in 2001 . This stress is not standardized in a satisfactory manner in terms of its complexity. The licensees therefore agreed on a list of chemicals for which they indicate the resistance with simple symbols ( smiley ) and stop signs, mainly at 23 ° C. The search is thus easily possible, but does not replace a more precise analysis of specific application conditions for the respective plastic. In the same version, the class of TPEs with their own properties was also included in CAMPUS. For this purpose, the test conditions within the ISO standards had to be coordinated with the requirements of the TPE. (see below )

At the same time, the online offer from CAMPUS was expanded. In 2001, WebView was launched, an Internet application that enables the display of CAMPUS data. In contrast to the offline version, this enables an even faster search and eliminates the need for installation, which is particularly advantageous for occasional users. However, WebView has not made this superfluous, as the functionality is somewhat lower and many users do not have a permanent Internet connection. In both cases, the manufacturer-independent search is only possible using the MCBase or Material Data Center variants that require a license.

Version 5

Screenshot of CAMPUS 5.1

Version 5, which appeared in 2004, was given a more modern interface and relied even more heavily on the Internet. The WebUpdate function now allowed the database to be updated at the push of a button. However, the further development of the content took place more slowly because a high standard had already been reached. New in version 5.0, up to three base polymers and two fillers or reinforcing materials according to ISO 1043 could be specified for a molding compound . In version 5.1, this method was expanded to include impact-modified and flame-retardant products. In addition, for the first time in version 5.1, characteristic values ​​for heat aging can be specified.

Version 5.2 was released in January 2010. In this version, additional data sheets corresponding to the VDA guideline 232-201 "Characteristic values ​​for material selection of thermoplastics" can be displayed and printed out. In addition to many of the characteristic values ​​previously contained in CAMPUS, new properties were added, such as light resistance , extended media resistance and the emission of low-molecular substances (monomers, plasticizers, solvent residues). This version was the last published desktop version, but will continue to be supplied with updated databases via the WebUpdate function. In 2018 CAMPUS announced on its website that it would no longer offer the desktop version "in the near future".

Website

After the further development of the desktop version was discontinued, its functionalities were gradually integrated into the campusplastics.com website. This was previously only used to display and download the desktop version. Thanks to the central administration of the data, a comparative display of the data from different raw material manufacturers was now possible for the first time. The search function has been expanded significantly and allows z. B. the input of synonymously used search terms and graphically supported limitation of property profiles. A number of video instructions in English explain the various functions. Responsive web design has been supported for optimal display on mobile devices since 2017 .

Basic values ​​catalog

The basic values ​​catalog is divided into one part each for test specimen production, processing technology, mechanical, thermal, electrical, optical and "other" properties. Another group describes the behavior towards external influences such as flammability , water and moisture absorption . All properties and test specimens are standardized in ISO 10350 as follows:

property				symbol	standard		Specimen type	unit
							(Size in mm)
Rheological properties
Melt volume flow rate				MVR	ISO 1133		material	cm 3 /10 min
Melt mass flow rate				MFR
shrinkage	Parallel (p)			S Mp	ISO 294-4 (Th.-plast)		60 × 60 × 2	%
					ISO 2577 (Th.-sets)
	Normal (noun)			S Mn	ISO 294-4 (Th.-plast)
Mechanical properties
Train module				E t	ISO 527-1 and -2		ISO 3167	MPa
Yield stress				${\displaystyle \sigma _{\mathrm {Y} }}$
Elongation				${\displaystyle \epsilon _{\mathrm {Y} }}$				%
nominal elongation at break				${\displaystyle \epsilon _{\mathrm {t} B}}$
Stress at 50% elongation				${\displaystyle \sigma _{\mathrm {5} 0}}$				MPa
Breaking stress				${\displaystyle \sigma _{\mathrm {B} }}$
Elongation at break				${\displaystyle \epsilon _{\mathrm {B} }}$				%
Tensile creep module			1h	${\displaystyle E_{\mathrm {t} c}}$1	ISO 899-1			MPa
			1000h	${\displaystyle E_{\mathrm {t} c}}$10 3
Charpy impact strength			unnotched	${\displaystyle a_{\mathrm {c} U}}$	ISO 179 / 1eU		80 × 10 × 4	kJ / m 2
			notched	${\displaystyle a_{\mathrm {c} A}}$	ISO 179 / 1eA
Tensile impact strength				${\displaystyle a_{\mathrm {t} 1}}$	ISO 8256/1
Impact behavior with multi- axis loading			Max. Force	${\displaystyle F_{\mathrm {M} }}$	ISO 6603-2		60 × 60 × 2	N
			Puncture energy	${\displaystyle W_{\mathrm {P} }}$				J
Bending module				${\displaystyle E_{\mathrm {f} }}$	ISO 178		80 × 10 × 4	MPa
Flexural strength				${\displaystyle \sigma _{\mathrm {f} }}$
Thermal properties
Melting temperature				${\displaystyle T_{\mathrm {m} }}$	ISO 11357-1 and -3		Molding compound	° C
Glass transition temperature				${\displaystyle T_{\mathrm {g} }}$	ISO 11357-1 and -2
Heat distortion temperature				${\displaystyle T_{\mathrm {f} }}$ 1.8	ISO 75-1 and -2		80 × 10 × 4
				${\displaystyle T_{\mathrm {f} }}$ 0.45
				${\displaystyle T_{\mathrm {f} }}$ 8.0
Vicat softening temperature				${\displaystyle T_{\mathrm {V} }}$ 50/50	ISO 306		${\displaystyle \geq }$ 10 × 10 × 4
Linear coefficient of thermal expansion		Parallel (p)		${\displaystyle \alpha _{\mathrm {p} }}$	ISO 11359-1 and -2			10 −6 K −1
		Normal (noun)		${\displaystyle \alpha _{\mathrm {n} }}$
Burning behavior		1.6mm thick		B50 / 1.6	UL 94	ISO 1210	125 × 13 × 1.6	class
				B500 / 1.6		ISO 10351	${\displaystyle \geq }$150 × 150 × 1.6 ${\displaystyle \geq }$
		-, - mm thick		B50 /-.-		ISO 1210	125 × 13 × -.-
				B500 /-.-		ISO 10351	${\displaystyle \geq }$150 × 150 × -.- ${\displaystyle \geq }$
Oxygen index				OI23	ISO 4589-1 and -2		80 × 10 × 4	%
Electrical Properties
Relative dielectric constant		100 Hz		${\displaystyle \epsilon _{\mathrm {r} }}$ 100	IEC 60250		${\displaystyle \geq }$60 × 60 × 1 ${\displaystyle \geq }$
		1 MHz		${\displaystyle \epsilon _{\mathrm {r} }}$ 1M			60 × 60 × 2
Dielectric dissipation factor		100 Hz		tan 100 ${\displaystyle \delta }$
		1 MHz		tan 1M ${\displaystyle \delta }$
Specific volume resistance				${\displaystyle \rho _{\mathrm {e} }}$	IEC 60093			${\displaystyle \Omega }$ m
Specific surface resistance				${\displaystyle \sigma _{\mathrm {e} }}$				${\displaystyle \Omega }$
electrical strength				${\displaystyle E_{\mathrm {B} }}$1	IEC 60243-1		${\displaystyle \geq }$60 × 60 × 1 ${\displaystyle \geq }$	kV / mm
Comparative figure for tracking				CTI	IEC 60112		${\displaystyle \geq }$15 × 15 × 4 ${\displaystyle \geq }$
Other characteristics
Water absorption				wW	ISO 62 and ISO 15512		Thickness 1 ${\displaystyle \geq }$	%
				wH	ISO 15512
density				${\displaystyle \rho }$	ISO 1183			kg / m 3

TPE properties

property	standard	unit
Stress at 10% elongation	ISO 527 -1 and 2	MPa
Stress at 100% elongation
Stress at 300% elongation
Elongation at break (up to> 300%)		%
Breaking stress		MPa
Set under constant elongation (23 ° C)	ISO 815	%
Deformation rest under constant elongation (70 ° C)
Deformation rest under constant elongation (100 ° C)
Tear resistance	ISO 34 -1	kN / m
Abrasion resistance	ISO 4649	mm 3
Shore hardness A (3s)	ISO 868	%
Shore hardness D (15s)

In addition to these one-point parameters, there is also a temperature-dependent stress-strain diagram for TPE.

Diagrams

The multipoint functions contained in CAMPUS are based on the international standards for comparable parameters ISO 11403-1 and ISO 11403-2.

property	X axis	z parameters	symbol	standard
Shear modulus [MPa]	Temperature [° C]	-	G ( T )	ISO 6721-1 , 2 and 7
Dynamic shear modulus [MPa]	Temperature [° C]	-	G ( T )	ISO 6721-1, 2 and 7
damping	Temperature [° C]	-	${\displaystyle \tan \delta (T)}$	ISO 6721-1, 2 and 7
Tensile modulus [MPa]	Temperature [° C]	-	${\displaystyle E_{\mathrm {t} }(T)}$	ISO 527-1, 2 and 3
Stress [MPa]	Elongation [%]	Temperature [° C]	${\displaystyle \sigma (\varepsilon )}$	ISO 527-1, 2 and 3
Secant modulus [MPa]	Strain [%]	Temperature [° C]	${\displaystyle E_{\mathrm {t} S}(\varepsilon ,T)}$	-
Creep stress [MPa]	Strain [%]	Time [h], temperature [° C]	${\displaystyle \sigma _{\mathrm {c} }(\varepsilon ,t,T)}$	ISO 899-1
Creep edge modulus [MPa]	Strain [%]	Time [h], temperature [° C]	${\displaystyle E_{\mathrm {t} cS}(\varepsilon ,t,T)}$	-
Enthalpy [kJ / kg]	Temperature [° C]	-	${\displaystyle \Delta H(T)/m}$	ISO 11357 -1 and 4
Viscosity [Pa s]	Shear rate [s −1 ]	Temperature [° C]	${\displaystyle \eta (\gamma ,T)}$	ISO 11443
Shear stress [Pa s]	Shear rate [s −1 ]	Temperature [° C]	${\displaystyle \tau (\gamma ,T)}$	ISO 11443
Specific volume [m 3 / kg]	Temperature [° C]	Pressure [MPa]	${\displaystyle v(T,p)}$	ISO 17744

swell

1. ↑ ^{a b} DIN EN ISO 10350 "Plastics - Determination and presentation of comparable one-point parameters", Beuth-Verlag
2. ↑ ^{a b} DIN EN ISO 11403 "Plastics - Determination and presentation of comparable multi-point parameters", Beuth-Verlag
3. ↑ ^{a b} Swiss Materials 2 (1990) No. 3a, p. 74 ff.
4. ↑ Guideline for the creation of molding compound standards, Part 2, 1988
5. ^ H. Breuer et al., Special print from Kunststoffe 80 (1990) 11
6. ^ H. Breuer et al., Special print from Kunststoffe 84 (1994) 7 + 8
7. ↑ R. Tüllmann et al., 21st VDI Annual Meeting Injection Molding Technology (1998), p. 167 ff.
8. ↑ E. Baur, Kunststoffe 88 (1998), p. 654 ff.
9. ↑ A. Lindner, Kunststoffe 91 (2001) 7, p. 28 ff.
10. ↑ D. Ayglon et al., Plastververarbeitung 51 (2001), pp. 188 ff.
11. ↑ E. Baur, Kunststoffe 5/2007, p. 76 ff.
12. ↑ MBase News. Retrieved January 15, 2010 . 
13. ↑ CAMPUSplastics Desktop. Retrieved February 15, 2019 . 
14. ↑ CAMPUSplastics Howto. Retrieved February 15, 2019 . 
15. ^ Contents of CAMPUS

Web links

• campusplastics.com
• Material data center
• Axxicon tools for CAMPUS specimens (PDF; 292 kB)