GB/T 27797.3-2011Fibre-reinforced plastics -- Methods of producing test plates -- Part 3: Wet compression moulding (English PDF)

Foreword

GB/T 27797 "fiber reinforced plastics test plates Preparation" is divided into 11 parts.

--- Part 1. General;

--- Part 2. the contact and injection molding;

--- Part 3. wet molding;

--- Part 4. prepreg molding;

--- Part 5. Filament winding;

--- Part 6. Pultrusion molding;

--- Part 7. resin transfer molding;

Part --- Article 8. SMC and BMC molding;

Part --- Article 9. GMT/STC molding;

--- Part 10. BMC and other long-fiber molding plastic injection molding and general principles common specimen molding;

--- Part 11. BMC and other long-fiber molding plastic injection molding small square pieces.

This section GB/T Part of 327,797.

This section drafted in accordance with GB/T 1.1-2009 given rules.

This section uses the translation method identical with ISO 1268-3:2000 (E) "fiber reinforced plastics test plates preparation methods - Part 3.

Wet molding. "

Consistency correspondence between this part of international documents and normative references of our files are as follows.

--- GB/T 1033 (all parts), non-plastic foam density measurement [ISO 1183 (all parts)];

--- Plastic resin content test methods (ISO 1172:1996, MOD) GB/T 2577-2005 glass fiber reinforced;

--- GB/T 27797.1 fiber reinforced plastic plate test preparation methods - Part 1. General (ISO 1268-1:2001, IDT).

This part made the following editorial changes.

--- Some of the statements apply to international standards to apply to our standard formulation;

--- In addition 5.1,5.2,8.2 article number.

This part is proposed by the China Building Materials Federation.

The fiber-reinforced plastic part by the National Standardization Technical Committee (SAC/TC39) centralized.

This section is drafted. Beijing glass Composite Material Co., Ltd., China North Industries Group fifty-three Institute, Changzhou Tianma Group has Limited.

1 Scope

This section GB/T 27797 specifies the preparation of test plates wet molding method. Test panels prepared by the process reproducibility can be realized, So at different times, different places performance comparison test plate was prepared possible.

From the test plate prepared by molding wet cutting samples can be used to determine the reinforcing properties of materials. Reinforcing materials can be used felts or fabric, you need the following properties.

--- Water absorption (ISO 62);

--- Bending strength and flexural modulus (ISO 178);

--- Impact properties (simply supported beam) (ISO 179);

--- Tensile strength, tensile modulus and elongation at break (ISO 527-4).

GB/T 27797 and this part of GB/T 27797.1 used together.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

ISO 1172:1996 Textile glass fiber reinforced plastic prepreg, molding compounds and laminates glass fibers and mineral fillers containing inorganic Determination of the amount of burning method (Textile-glass-reinforcedplastics-Prepregs, mouldingcompoundsandlaminates-Determinationofthetextile-glassandmineralfilercontent-Calcinationmethods) Determination of ISO 1183 (all parts), non-plastic foam density (Plastics-Methodsfordetermining thedensityofnon-celularplastics) ISO 1268-1 fiber reinforced plastics test plates preparation methods - Part 1. General (Fibre-reinforcedplastics-Methodsofproducingtestplates-Part 1. Generalconditions) ISO 2555 Plastics liquid resin emulsions or dispersions - Determination of apparent viscosity (Plastics- with Brookfield test method Resinsintheliquidstateorasemulsionsordispersion-Determinationofapparentviscositybythe blookfieldtestmethod) Health and safety See ISO 1268-1.

Principle 4

Pressure exerted on the two flat mold, wet molding to prepare test plates. The lower die plate is fixed, the die plate can be pressed to the lower die plate. will Carpets and other textile reinforcing material or placement of the lower die plate at the top reinforcing material into the amount of resin, and then through the die plate of the lower mold plate Pressure, under pressure, the flow of the resin system in reinforcing material. The gap between the two templates can be adjusted, it is possible to adjust the reinforcing material Content material and resin. Test panels or high temperature cure can be cured at room temperature, curing temperature and curing time depend on the resin system used.