Processing technology for producing electrical polyester non-woven fabric

Abstract

The invention relates to the technical field of non-woven fabric processing, in particular to a processing technology for producing an electrical polyester non-woven fabric. The processing technology specifically comprises the following steps of: primary opening and fine opening of polyester fibers, cotton blending, vibratory cotton feeding, pre-combing, high-speed net laying, multi-roll drawing, primary combing, hot rolling and winding formation. A combing machine is used for pre-combing to remove impurities in longitudinal fibers of polyester fibers; the fibers are straightened through a multi-roll drawing process to prevent the fibers from being curled; and the combing machine is further used for primary combing to remove short staples. By adopting the processing technology, the situations that the static electricity of the fibers is much, the fibers are uneasy to comb, the cloudiness of the product is much and the like in the prior art can be avoided, the produced polyester non-woven fabric is enabled to have the characteristics of small thickness, good evenness and compactness, high tensile strength, high insulation class and the like, and the polyester non-woven fabric can be widely used as an insulating material for making insulated electrical equipment such as motors, power generators and transformers.

Description

Technical field

[0001] The invention relates to the technical field of non-woven fabric processing, in particular to a processing technology for producing polyester non-woven fabric for electrical use. Background technique

[0002] Polyester fiber is a high-performance fiber with high temperature resistance, insulation and flame resistance. One of its main uses is to manufacture high-grade insulation materials for motors, generators, and transformers. At present, non-woven fabrics are generally made of polyester fibers using a single processing technology, but the fibers are electrostatically high and difficult to comb, and the appearance of the product is more clouded, resulting in large local gaps, large pores, and poor uniformity. The insulation of the product has a certain impact. Summary of the invention

[0003] The purpose of the present invention is to provide a processing technology for producing polyester non-woven fabrics for electrical use with thin thickness, uniform...

Examples

Embodiment 1

[0008] Example 1: Production of insulating material with a thickness of 0.05mm

[0009] The specific steps are: (1) Select polyester fiber with a thickness of 1.67D×38mm in length, and use an opener for initial opening; (2) Further use an opener for fine opening; (3) , Use a cotton blender to blend cotton; (4), vibrate the cotton, every 80g as a cotton feed; (5) use a carding machine for pre-carding to remove impurities from its longitudinal fibers; (6), high-speed auxiliary net , The number of auxiliary web layers is 6; (7), multi-roll drafting, to straighten the fiber to prevent crimping; (8), use a carding machine to further main comb to remove short lint; (9), hot rolling, The temperature of the hot rolling mill is 237 degrees Celsius, and the pressure is 70 kilograms; (10). Rewinding and forming are cooled by circulating water, and the temperature of the nonwoven fabric after being off the machine is 40 degrees Celsius.

Embodiment 2

[0010] Example 2: Production of insulating material with a thickness of 0.06mm

[0011] The specific steps are: (1) Select polyester fiber with a thickness of 2.22D×51mm in length, and use an opener for initial opening; (2) Further use an opener for fine opening; (3) , Use a cotton blender to blend cotton; (4), vibrate the cotton, every 80g as a cotton feed; (5) use a carding machine for pre-carding to remove impurities from its longitudinal fibers; (6), high-speed auxiliary net , The number of auxiliary web layers is 9; (7), multi-roll drafting, straighten the fiber to prevent crimping; (8), use a carding machine to further main comb to remove short lint; (9), hot rolling, The temperature of the hot rolling mill is 239 degrees Celsius, and the pressure is 90 kilograms; (10). Rewinding and forming are cooled by circulating water, and the temperature of the nonwoven fabric after being off the machine is 45 degrees Celsius.

Embodiment 3

[0012] Example 3: Production of insulating material with a thickness of 0.07mm

[0013] The specific steps are: (1) Select polyester fiber with a thickness of 2.78D×51mm in length, and use an opener for initial opening; (2) Further use an opener for fine opening; (3) , Use a cotton blender to blend cotton; (4), vibrate the cotton, every 80g as a cotton feed; (5) use a carding machine for pre-carding to remove impurities from its longitudinal fibers; (6), high-speed auxiliary net , The number of auxiliary web layers is 12; (7), multi-roll drafting, to straighten the fiber to prevent curling; (8), use a carding machine to further main comb to remove short lint; (9), hot rolling, The temperature of the hot rolling mill is 241 degrees Celsius, and the pressure is 120 kilograms; (10). Rewinding and forming are cooled by circulating water, and the temperature of the nonwoven fabric after being off the machine is 50 degrees Celsius.

Technical field

[0001] The invention relates to the technical field of non-woven fabric processing, in particular to a processing technology for producing polyester non-woven fabric for electrical use. Background technique

[0002] Polyester fiber is a high-performance fiber with high temperature resistance, insulation and flame resistance. One of its main uses is to manufacture high-grade insulation materials for motors, generators, and transformers. At present, non-woven fabrics are generally made of polyester fibers using a single processing technology, but the fibers are electrostatically high and difficult to comb, and the appearance of the product is more clouded, resulting in large local gaps, large pores, and poor uniformity. The insulation of the product has a certain impact. Summary of the invention

[0003] The purpose of the present invention is to provide a processing technology for producing polyester non-woven fabrics for electrical use with thin thickness, uniform...

Examples

Embodiment 1

[0008] Example 1: Production of insulating material with a thickness of 0.05mm

[0009] The specific steps are: (1) Select polyester fiber with a thickness of 1.67D×38mm in length, and use an opener for initial opening; (2) Further use an opener for fine opening; (3) , Use a cotton blender to blend cotton; (4), vibrate the cotton, every 80g as a cotton feed; (5) use a carding machine for pre-carding to remove impurities from its longitudinal fibers; (6), high-speed auxiliary net , The number of auxiliary web layers is 6; (7), multi-roll drafting, to straighten the fiber to prevent crimping; (8), use a carding machine to further main comb to remove short lint; (9), hot rolling, The temperature of the hot rolling mill is 237 degrees Celsius, and the pressure is 70 kilograms; (10). Rewinding and forming are cooled by circulating water, and the temperature of the nonwoven fabric after being off the machine is 40 degrees Celsius.

Embodiment 2

[0010] Example 2: Production of insulating material with a thickness of 0.06mm

[0011] The specific steps are: (1) Select polyester fiber with a thickness of 2.22D×51mm in length, and use an opener for initial opening; (2) Further use an opener for fine opening; (3) , Use a cotton blender to blend cotton; (4), vibrate the cotton, every 80g as a cotton feed; (5) use a carding machine for pre-carding to remove impurities from its longitudinal fibers; (6), high-speed auxiliary net , The number of auxiliary web layers is 9; (7), multi-roll drafting, straighten the fiber to prevent crimping; (8), use a carding machine to further main comb to remove short lint; (9), hot rolling, The temperature of the hot rolling mill is 239 degrees Celsius, and the pressure is 90 kilograms; (10). Rewinding and forming are cooled by circulating water, and the temperature of the nonwoven fabric after being off the machine is 45 degrees Celsius.

Embodiment 3

[0012] Example 3: Production of insulating material with a thickness of 0.07mm

[0013] The specific steps are: (1) Select polyester fiber with a thickness of 2.78D×51mm in length, and use an opener for initial opening; (2) Further use an opener for fine opening; (3) , Use a cotton blender to blend cotton; (4), vibrate the cotton, every 80g as a cotton feed; (5) use a carding machine for pre-carding to remove impurities from its longitudinal fibers; (6), high-speed auxiliary net , The number of auxiliary web layers is 12; (7), multi-roll drafting, to straighten the fiber to prevent curling; (8), use a carding machine to further main comb to remove short lint; (9), hot rolling, The temperature of the hot rolling mill is 241 degrees Celsius, and the pressure is 120 kilograms; (10). Rewinding and forming are cooled by circulating water, and the temperature of the nonwoven fabric after being off the machine is 50 degrees Celsius.

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