FORMVAR
(Class 105) (NEMA MW 15) JW-1177/4)

Formvar is a polyvinyl formal resin enamel successfully used as general purpose insulation for many years. Uses include the manufacture of oil filled transformers and electrical motors. It is an extremely tough and abrasion resistant insulation capable of withstanding severe windability and forming requirements. It is compatable with most varnished and encapsulants.

POLYURETHANE ENAMEL  Return To Top
(Class 155) (NEMA MW 79C) (JW-1177/41)

Polyurethane resin modified with other resins comprise the enamel coating on this type of magnet wire. This film is an all purpose enamel that can be wound easily and rapidly into many types of coils. It's unique property is its ability to be soldered without prior removal of the enamel. It is an excellent enamel for the manufacture of Litz wire because of ease of soldering, very high moisture resistence, and low dielectric losses at high frequescies.

POLY-NYLON  Return To Top
(Class 155) (MW-80C) (JW-1177/42)

This construction consists of a nylon enamel film over a polyurethane enamel base coat. The addition of the nylon improves cut through temperature, windability, resistence to abrasion, and resistence to chemicals and solvents without any significant change in soldering properties. Because of these improved propoerties, this insulation is the perferred type in wire sizes 30 AWG and larger where a solderable film is required.

TERASOD (ALSO ISOWELD)  Return To Top
(CLASS 180) (MW-77C) (JW-1177/39)

The base resin in this wire enamel is a modified polyester based on a terephtalic acid. It can be substituted freely as replacement for lower class insulations in many applications with a substantial increase in the temperature rating of the component. The solvent resistence of Isonel is very good and practically all types of impregnating varnishes may be used with it.

ISONEL  Return To Top
(Class 155) (MW-5C) (JW-1177/10)

This insulation is manufactured from a modified polyester based on terephtalic acid. It can be substituted freely as replacement for lower class insulations in many applications with a substantial increase in the temperature rating of the component. The solvent resistance of Isonel is very good and practically all types of impregnating varnishes may be used with it.

ISOMID  Return To Top
(CLASS 180) (MW-30C) (JW-1177/12)

This insulation is a superior high temperature enamel prepared from a polyester-polyimide polymer. It can be freely substituted for dual coated high temperature polyester type films, and has improved heat shock, cut-through, thermal flexibility, and Freon resistance at higher temperatures.

OMEGA  Return To Top
(Class 200) (MW-74C) (JW-1177/43)

This insulation is another superior high temperature enamel based on polyester-amide-imide resins. It can be freely substituted for dual coated class 200 magnet wire in the finer sizes.

ISOMID with AI TOPCOAT  Return To Top
(Class 200) (MW-35C) (JW-1177/14)

This insulation consists of Isomid enameled wire with a polyamide-imide topcoat. It has superior burnout, heat shock, and cut-thru resistance. It also has excellent windability properties permitting its use in practically all applications subjected to continous high temperatures and sudden overloads.

POLYMIDE (ML) ENAMEL  Return To Top
(class 220) (MW-16C) (JW-1177/15)

This insulation has the best high temperature properties of all wire enamels developed to date. Its burnout, heat shock, and cut-thru or thermoplastic flow resistance far exceeds that of all other enamels.

POLYBOND (Polyurethane with a Thermoplastic Cement Overcoat  Return To Top
(class 105) (MW-3C) (JW-1177/30)

This insulation consists of Polyurethane enameled wire and an additional layer of thermoplastic cement. The thickness classifications are identified as Polybond #1 which is Single Polyurethane with sufficient overcoat to increase the diameter of the wire to that of Heavy Polyurethane, Polybond #2, which is Heavy Polyurethane and a layer of overcoat cement with dimensions of Triple Polyurethane. The application of heat or a suitable solvent, or both, cements all of the turns together, forming a solid bonded mass. The bondable topcoat is based on polyvinyl butyral resin.

SY BONDEZE  Return To Top
(Class 105) (MW-29C) (JW-1177/30)

This insulation is similar to Polybond with the exception that a layer of polyamide (nylon) is superimposed over the underlying polyurethane before the application of the butryal topcoat. This provides for higher cut-thru values than obtainable with Polybond, upgrading it to Class 130.

GRIPEZE  Return To Top

This insulation consists of Polyurethane Enamel with an additional overlying film which imparts a high friction surface to the wire. It is used as a substitute for the textile insulated wire in the manufacture of universal wound coils or other types of self supporting coils forms. Gripeze is solderable without stripping to the same degree as Polyurethane. This insulation is made in two grades: Gripeze #1 which has the same dimensions as Heavy Polyurethane; Gripeze #2 which has the dimensions of Triple Polyurethane.

Bondable Topcoats available from Bridgeport that can be applied to all B.I.W. base coats.  Return To Top

Textile Served and Varnished magnet wire manufactured by B.I.W.  Return To Top

Cotton Insulated Wire
(Class 90 and 105) (MW-11C) (JW-1177/46)

Nylon Fiber Insulated Wire
(Class 90 and 105) (MW-22C) (JW-1177/47)

Cellulose Acetate Rayon Fiber Insulated Wire (Celanese)
(Class 90 and 105)

Nomex Fiber Insulated Wire
(Class 200)

Kevlar Fiber Insulated Wire
(Class 220)

Glass Fiber Varnish Bonded Wire
(Class 180) (MW-51C) (JW-1177/32)

Daglas Insulated, Varnish Bonded Wire
(Class 180) (MW-51C) (JW-1177/33)

Military Specifications  Return To Top

All of Bridgeport Wires products are manufactured to NEMA 1000 specifications. Many insulators are also UL approved or in the process of receiving such approval. Many insulations have also received Naval (JW-1177/A) approval. Our Engineering Department is always available for consultation regarding government approvals.

ESTRON: Eastman Chemical Products^TM
DAGLAS: Phelps Dodge Reg.^TM
GRIPEZE: Phelps Dodge Reg.^TM
SY BONDEZE: Phelps Dodge Reg.^TM
ISOMID: Schnectady Chemicals^TM
ISONEL: Schnectady Chemicals^TM
ISOWELD: Schnectady Chemicals^TM
TERASOD: P.D. George^TM
ML: DuPont Co.^TM
NOMEX: DuPont Co.^TM
KEVLAR: DuPont Co.^TM
DACRON: DuPont Co.^TM
OMEGA: Westinghouse^TM