Glass fiber impregnating agent and application thereof to production of glass fiber yarn for enhancing SMC-A grade surface

Abstract

The invention discloses a glass fiber impregnating agent and application thereof to production of glass fiber yarn for enhancing an SMC-A grade surface. The glass fiber impregnating agent is prepared from the following components, and mass dosages of all components accounting for the total mass of the impregnating agent are as follows, if the components are added in a dispersion system form, the mass dosages thereof accounting for the solid mass are as follows: (1) 0.20-0.60 percent of pH regulator, (2) 0.40-0.80 percent of coupling agent, (3) 0.10-0.40 percent of lubricant, (4) 6.00-14.00 percent of unsaturated polyester emulsion, (5) 2.00-6.00 percent of polyester-modified epoxy resin emulsion, (6) 10.00-12.00 percent of polyvinyl acetate emulsion and (7) the balance of deionized water. The invention provides the application of the glass fiber impregnating agent to production of glass fiber yarn for enhancing the SMC-A grade surface, and the yarn for the A grade surface, produced by the impregnating agent, has the advantages of high starting rate, high stiffness, low winding hair rate, less fluffs in the winding process, high yield of a molded product, smooth surface, good mechanical performances and the like.

Description

(1) Technical field [0001] The invention relates to a novel glass fiber sizing agent and its application in the production of glass fiber yarns for reinforcing SMC-A grade surfaces. (2) Background technology [0002] Sheet molding compound (SMC) is a molding compound for dry manufacturing unsaturated polyester resin FRP products. It was first introduced by Bayer in Germany in the early 1960s. Around 1965, the United States and Japan successively developed this technology. Since then, due to its excellent productivity, strength characteristics, heat resistance, and surface properties, it has quickly entered various application fields. [0003] Class A surface SMC is a relatively high-end SMC application developed in recent years. It is mainly used in automotive exterior parts or body panels, and its appearance should achieve the same effect and level as painted steel panels. Generally, the physical performance requirements of SMC for Class A surface (taking 30% glass fiber ...

AI Technical Summary

Problems solved by technology

However, there are still problems in the production of existing sizing agents such as low operating rate and full cylinder rate, high hairiness rate, and general mechanical strength of molded products. In order to improve production efficiency and product quality, the above problems need to be solved urgently

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