What is BS 2782-7:Method 721A – Rheological properties of plastics about?
BS 2782-7:Method 721A is an international standard that focuses on rheological properties and determination of resin flow from resin-impregnated glass fabric.
BS 2782-7:Method 721A describes a procedure for assessing the flow of resin under heat and pressure from glass fabric impregnated with polyester, epoxy or silicone resin.
BS 2782-7:Method 721A is applicable to all types of resin-impregnated substrates, e.g. paper, cotton fabric, cotton/synthetic fibre fabric, glass mat, glass rovings and also other resins, e.g. phenolic, melamine and polyamide.
Who is BS 2782-7:Method 721A - Rheological properties of plastics for?
BS 2782-7:Method 721A on rheological properties and determination of resin flow from resin-impregnated glass fabric useful for:
- Textile manufacturer
- Clothing industries
- Textile testing laboratories
- Product development teams
- Regulatory authorities
- Quality control personnel
Why should you use BS 2782-7:Method 721A - Rheological properties of plastics?
A test piece, consisting of superimposed layers of the material under test, is pressed between heated steel plates under appropriate conditions of temperature, pressure, and time.
BS 2782-7:Method 721A has been prepared under the direction of the Plastics Standards Committee. BS 2782-7:Method 721A describes a procedure for the determination of the flow of resin under heat and pressure from resin-impregnated glass fabric.
BS 2782-7:Method 721A covers scope, principles, expressions of results, test pieces, and procedure to determine resin flow from resin-impregnated glass fabric.
BS 2782-7:Method 721A is suitable for testing the product known as “pre-impregnated” glass fabric, i.e. resin impregnated glass fabric that can be purchased as such and used for the manufacture of laminated sheets and mouldings.
BS 2782-7:Method 721A also focused on the tow deformation phenomenon in the reinforcing fibres. The flow behaviour in double-scale porous media was experimentally investigated under different hydrodynamic force effects, flow rates, and viscosities. It helps you examine the permeability behaviours in the double-scale porous media, with the hydrodynamic force effect, to observe tow deformations.
