导航菜单
Search
Search:
Advertisement
文章正文
Fiberglass reinforced polyurethane for structural core material
Writer:admin    Released:2018-03-30 09:54:52    Type:【L】【M】【S

Polyurethane resin in addition to the structure used as the matrix of the composite, the rigid foam is still in a growing number of USES (in shipbuilding, construction, wind power, etc.) is used as the core material of glass fiber reinforced structure matrix.

Nida-core, an American manufacturer of Core materials, now offers two types of fiberglass reinforced hard obturator polyurethane foam Core products, and the product brands are STO and SXO.

The way these products are made is to use their patented devices to insert fiberglass into polyurethane foam boards.

Glass fiber (generally E glass fiber) without twist roving from the yarn tube after the continuous implant in the plate without cutting short.

In STO products, the glass fiber is arranged in parallel along the length of the plate, thus improving the longitudinal performance.

In SXO products, glass fibers are implanted along three different axes, forming three-dimensional "pyramids" or triangles in the board.

This results in the quasi-isotropic effect, which makes the longitudinal and transverse materials and mechanical properties relatively equal.

The purpose of STO and SXO core material is to transfer molding process of vacuum assisted resin.

According to the introduction, the cheapest foam material that can withstand one atmosphere pressure during the molding process is the rigid polyurethane foam.

When manufacturing sandwich composites, the STO and SXO cores are generally sandwiched between the glass cloth layers and are filled with unsaturated polyester or vinyl ester resin.

The resin flows through the core material, into the fiber insertion point, along the fiber flow, and saturates the fibers.

The idea of making glass fiber reinforced rigid polyurethane core material comes from the need to improve the structure of sandwich panels in refrigerated vehicles, according to people familiar with the matter.

The shear performance of low density polyurethane foam used as an insulating material in refrigerated vehicles is generally poor, and it is necessary to implant reinforcement to strengthen the combination of skin and skin.

These reinforcements add material and manufacturing costs and form a thermal bypass.

The glass fiber reinforced polyurethane core material simplifies the structure and improves the adiabatic performance.

The American Kay composite materials company also manufactures glass fiber reinforced high density polyurethane panels, with the name Kay.

The standard plate size is 1.2m x 2.4m, which can also provide a larger size according to the requirements.

The thickness of the plate is 12.7mm ~ 50.8mm.

Each board contains two layers of fiberglass without twist, with polyurethane foam.

The minimum density of polyurethane foam is 20 pounds per cubic foot, and the highest density is 30 pounds per cubic foot.

Kay core material is mainly used as the core material of Marine sandwich composite materials, and is increasingly entering the wind energy market.

It is reported that it has been used for more than 50000 ships, mainly used for stern frame and other parts which must bear high load, so far there have been no reports of failure.

Kay core has the strength of bending strength and compressive strength similar to wood, and has the advantages of water resistance and non-decay.

Kay core material can be used in resin transfer molding or vacuum assisted resin transfer molding.

The typical sandwich structure consists of a layer of adhesive, a layer of glass fiber impregnated with vinyl ester or epoxy resin, a layer of Kay core material and another layer of resin impregnated glass fiber.

Under normal circumstances, the resin cannot be filled with the closed-cell foam polyurethane, but manufacturers often drill holes in the core material to allow the resin to penetrate and lock the cortical material on both sides of the core material.

Polyurethane foam wood is more expensive than Barcelona but cheaper than PVC foam, used to make a more expensive ships in history, but now also appeared in the mass production of pleasure boats using polyurethane core material.

As the blades grow larger, engineers are looking for ways to reduce the weight of the blades, including a new hybrid structure.

In the past, polyvinyl chloride were used, but now more materials, such as polyurethane, are used.

The use of polyurethane core material can be used to make a longer vane and maintain the structural integrity and strength.

FEEDBACK
Name:
Phone:
Mail:
Company:
Content:
Address:
 
CONTACT US
Salse:Fred Wei
Skype: fred.wei08
Tel:+86-0832-8242208
Fax:+86-0832-8241969
Email:fred@chinaweibo.com.cn
Address:Group 3, Weijia, Yanling Town, Weiyuan County, Sichuan

TEL:+86-18602883091 +86-0832-8242208 FAX:+86-0832-8241969 Email:fred@chinaweibo.com.cn

Address:Webo Industrial Park, Yanling Town, Weiyuan Country, Sichuan, China

Sichuan Sincere&Long-term Complex Material Co., Ltd Copyright(C)2009-2016

fiberglass chopped strand mat

Online Service