News

your current location:首页 / News

Main use of fiberglass

文章出处:张家港帝达机械有限公司 发布时间:2018-09-19

Main uses of fiberglass:

       
Rough roving

       
The  flawless roving that people come into contact with in daily life is  simple in structure, and is formed by a bundle of mutually parallel  monofilaments. The  roving can be divided into two types: alkali-free and medium-base,  which are mainly distinguished according to the difference in glass  composition. In order to produce a qualified glass roving, the glass fiber used should be between 12 and 23 μm in diameter. Due  to its characteristics, it can be used directly in the molding of some  composite materials, such as in the winding and pultrusion processes. It can also be woven into a roving fabric, mainly because of its very uniform tension. In addition, the field of application of the roving after chopping is also very extensive.

      
Untwisted roving for spraying

      
In the FRP injection molding process, flawless roving must have the following performance:

      
1.  In the production, since continuous cutting is required, it is  necessary to ensure that the static electricity generated at the time of  cutting is small, which requires good cutting property.

      
2. After cutting, ensure that the original yarn is produced as much as possible, so the yarn-forming efficiency is high. The efficiency of disintegrating into a strand after the roving is cut is high.

      
3.  After the short cut, the original silk must have a good film covering  property because it is necessary to ensure that the original silk can be  completely covered on the mold.

      
4. Because it is easy to be flattened by the roller to crush the air bubbles, the resin is required to penetrate quickly.

      
5. Due to different spray gun models, in order to suit different spray guns, the thickness of the original yarn is moderate.

      
SMC roving

       
SMC  is also known as sheet molding compound, which can be found in everyday  applications. SMC rovings are used in all kinds of seats, such as car  accessories, bathtubs and various seats. In  the production, there are many requirements for the roving of SMC. It  is necessary to ensure good short cut, good antistatic property and less  wool to ensure the quality of the SMC sheet obtained. For  colored SMC, the requirements for roving are different, and it is  necessary to ensure easy penetration in the pigment content of the  resin. Usually, the common SMC roving is 2400 tex, and there are also a few cases of 4800 tex.

      
Winding roving

      
In order to produce different thickness of glass steel pipe, storage tank winding method came into being. For the roving for winding, the following characteristics must be possessed.

      
1. It must be easy to tape, usually in a flat ribbon.

      
2.  Since the general roving is easy to take off when it is retracted from  the bobbin, it must be guaranteed that its decomposability is excellent,  and the resulting silk cannot be as messy as the nest. 3 The tension cannot be suddenly and small, and the drape cannot occur.

      
4. The linear density requirement for the roving is that the requirements are uniform and less than the specified value.

      
5. In order to ensure easy wetting when passing through the resin tank, the permeability of the roving is required to be good.

      
Pullless roving

       
The pultrusion process is widely used in the manufacture of various profiles with uniform cross-sections. The roving of pultrusion must ensure that its glass fiber content and unidirectional strength are at a high level. The  squeezing roving used in the production is a combination of multiple  strands of raw yarn, and some may be direct rovings, both of which are  possible. Its other performance requirements are similar to winding rovings.

       
Our  company's main equipment is XPE cross-linked foaming equipment, glass  fiber composite sheet material equipment, PVC single and double color  spinning floor mat equipment, PC/ABS sheet metal equipment, PET sheet  metal equipment, polymer spinning equipment, PC In-film  co-extrusion composite membrane equipment, co-extrusion composite sheet  equipment in PC film, co-extrusion composite sheet equipment in PC  film, and the like.


下一页:Zhangjiagang City Dida Machinery Co., Ltd. is online!
上一页:PET transparent sheet production line