CN104120502B - Totally biodegradable poly butylene succinate long filament - Google Patents

Abstract

The present invention proposes a kind of totally biodegradable poly butylene succinate long filament, relates to fibre technology field, and its component is 100% poly butylene succinate.Long filament of the present invention overcomes terylene and polyamide fibre poor air permeability, shortcoming that polypropylene fibre is easily aging, has natural fabric soft comfortable, easily nursing, chromatophilous feature; With the fabric that this fiber is made into, there is the characteristic of premium properties, particularly its totally biodegradable of slim and graceful, pro-skin, ventilative, environmental protection, catered to the idea of development of soil protection that present society advocates and low-carbon environment-friendly.

Description

Fully biodegradable polybutylene succinate filament

technical field

The invention relates to the field of fiber technology, in particular to a fully biodegradable polybutylene succinate filament.

Background technique

Completely biodegradable plastics maintain the same level of function as existing plastics during use. After use, they can act on microorganisms such as bacteria, fungi, and seaweed in nature, and finally decompose into inorganic polymer materials such as water and carbon dioxide, thereby preventing environmental pollution. It plays a role in protecting the soil and the environment, so it is called "green plastic". Completely biodegradable plastics can be divided into microbially synthesized degradable plastics, natural product degradable plastics and chemically synthesized degradable plastics from the composition of raw materials and preparation methods.

Chemically synthesized degradable plastics can be divided into aliphatic polyesters and aromatic polyesters. At present, aliphatic polyester is the most promising class of polymer materials in biodegradable materials. Among aliphatic polyesters, PBS has the best comprehensive performance and reasonable cost performance, and is the leader among biodegradable materials. Moreover, the raw materials 1,4-succinic acid and 1,4-butanediol for synthesizing PBS can be obtained not only from petrochemical routes, but also from coal chemical routes or bio-fermentation routes, which are more environmentally friendly and economically valuable. In recent years, research on PBS-based degradable plastics has been active at home and abroad, but there are very few reports on the use of 100% PBS in the preparation of fibers.

For example, Japan's Unijika Company uses a copolymer containing PBS and succinate to prepare a biodegradable heat-resistant sheath-core polyester monofilament with high tensile strength. The melting point of the skin layer polymer is lower than that of the core layer. The prepared monofilament lost 3.6% of its mass after being buried in soil for three months. The company also invented a composite long thread with a concentric three-layer structure spun into PBS and ethylene succinate copolymer, polybutylene adipate or polysebacate in different proportions. Melt-spun fibers have excellent physical properties and can be completely degraded.

For example, Kimberly-Clark Global Co., Ltd. has developed a hydrophilic fiber for bonding. Such fibers can be produced by co-spinning a polyolefin core material with a highly wettable aliphatic polyester blend sheath material. The composition of highly wettable aliphatic polyester blends includes PBS, succinic acid-butylene adipate copolymer, polycaprolactone polymers, mixtures of these polymers or copolymers of these polymers, poly Carboxylic acid, and wetting agent etc. The hydrophilic binder fiber has significantly improved biodegradability and is easy to process. The disposable absorbent article made of the hydrophilic bonding fiber can be used to absorb fluids such as body fluids.

For example, the publication number CN101597815A, 2009.12.9, discloses "a preparation method of polybutylene succinate fiber", and the spinning raw material polybutylene succinate and the spinning raw material phase change material microcapsule are pressed The mass ratio is (88～100):(12～0), and the total mass of the spinning processing additive, polybutylene succinate and phase change material microcapsules is formulated according to the mass ratio of (0.1～0.5):100 Ratio mixing; melt spinning at a spinning speed of 500-800m/min; drafting and heat setting to obtain polybutylene succinate fibers.

The above studies or publications are all blending PBS with other materials to prepare fibers, and there is no relevant report on the pure use of PBS, a completely biodegradable material, for the preparation of filaments by melt spinning technology.

Contents of the invention

The present invention proposes a fully biodegradable polybutylene succinate filament, which is composed of 100% polybutylene succinate and can be completely degraded.

Technical scheme of the present invention is realized like this:

A fully biodegradable polybutylene succinate filament, wherein the polybutylene succinate filament is composed of 100% polybutylene succinate.

The above-mentioned fully biodegradable polybutylene succinate filament can be obtained by the following preparation method, specifically comprising:

(a) drying polybutylene succinate slices; wherein the drying temperature is 60-90°C, and the drying time is 6-12h;

(b) melt-spinning the dried polybutylene succinate chips to obtain polybutylene succinate pre-oriented yarns POY, fully oriented yarns FDY or highly oriented yarns HOY;

Spinning temperature: biphenyl 160℃～270℃, screw temperature 135℃～270℃; spinning speed: 1500～4200m/min;

(c) Subsequent processing of pre-oriented yarns to prepare polybutylene succinate filaments; draw ratio: 1.2-1.85 times, deformation temperature: 50-100°C, winding speed: 450-650m/min.

The drying temperature of the step (a) of the present invention is 60-90°C, and the drying effect is not good if the temperature is lower than 60°C, and the slices are easy to deteriorate and the properties are changed if the temperature is higher than 90°C.

As a preferred technical solution, the component formula of the step (b) is: half of the metal sand 10/20 mesh, and then filled with a 250-300 mesh filter mesh.

As a preferred technical solution, in the step (b), the cooling air temperature is 20°C-26°C, the wind speed is 0.25-0.45m/s, and the position of the oil nozzle is 80-130cm away from the spinneret.

As a preferred technical solution, the step (b) spinning angle is 6-8 degrees.

As a preferred technical solution, the step (a) is pre-crystallized before drying.

Beneficial effect

The filament yarn of the present invention overcomes the disadvantages of poor air permeability of polyester and nylon and easy aging of polypropylene fiber, and has the characteristics of soft and comfortable natural fiber, easy care and easy dyeing; the fabric woven with this fiber has excellent lightness, skin-friendly and breathable 1. The performance of green and environmental protection, especially its completely biodegradable characteristics, caters to the development concept of low carbon and environmental protection advocated by the current society.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The present invention provides the preparation method of the front and back passages of PBS fiber, which is a completely biodegradable material, by improving the process. Through the method of the present invention, 100% completely biodegradable filaments can be prepared from PBS, which is still in the research stage at home and abroad. . See the examples for details.

Example 1

A completely biodegradable polybutylene succinate filament, wherein the component of the polybutylene succinate filament is 100% polybutylene succinate.

The preparation method of the above-mentioned fully biodegradable polybutylene succinate filament, comprising:

(a) Purchase polybutylene succinate (PBS) slices from the market. After the slices are pre-crystallized, they enter the drying tower and use a vacuum drum dryer to dry the PBS slices. The drum of the drum is slightly inclined. And can rotate the cylinder, the wet slices enter from the upper part of one end, and the dry slices are collected from the lower part of the other end. The hot air enters from the feed end or the discharge end, and is discharged from the upper part of the other end. There is a forward lifting board in the cylinder, so that the slices are continuously picked up and sprinkled during the rotation process in the cylinder, so that they can fully contact with the hot air flow, so as to improve the drying efficiency. The drying temperature is 60-90° C. and the drying time is 6-12 hours, so that the moisture content of the slices is lower than 50 ppm.

(b) Melt spinning the above-mentioned dried chips to obtain polybutylene succinate pre-oriented yarns POY, fully oriented yarns FDY and highly oriented yarns HOY.

Spinning temperature: biphenyl 160°C, screw temperature 270°C; spinning speed: 1500-4200m/min.

(c) Subsequent processing of pre-oriented yarns to prepare polybutylene succinate filaments; draw ratio: 1.2 times, deformation temperature 100°C, winding speed 450-650m/min.

The aforementioned fully biodegradable polybutylene succinate filaments are not limited to this method of preparation.

Example 2

A completely biodegradable polybutylene succinate filament, wherein the component of the polybutylene succinate filament is 100% polybutylene succinate.

Above-mentioned a kind of preparation method of fully biodegradable polybutylene succinate long filament comprises:

(a) Buy polybutylene succinate (PBS) slices from the market, and the slices first enter the pre-crystallizer (whether to pass through the crystallizer is selected according to the material conditions), and then enter the drying tower, using a vacuum drum The dryer dries the PBS slices. The drum of the drum is a slightly inclined and rotatable cylinder. The wet slices enter from the upper part of one end, and the dry slices are collected from the lower part of the other end. The hot air enters from the feed end or the discharge end, and is discharged from the upper part of the other end. There is a forward lifting board in the cylinder, so that the slices are continuously picked up and sprinkled during the rotation process in the cylinder, so that they can fully contact with the hot air flow, so as to improve the drying efficiency. The drying temperature is 60-90° C. and the drying time is 6-12 hours, so that the moisture content of the slices is lower than 50 ppm.

(b) Melt spinning the above-mentioned dried chips to obtain polybutylene succinate pre-oriented yarns POY, fully oriented yarns FDY and highly oriented yarns HOY.

The component formula is: half of metal sand 10/20 mesh, and then fill it with 250-300 mesh filter.

Spinning temperature: biphenyl 270℃, screw temperature 135℃; spinning speed: pre-oriented yarn POY2500～3500m/min, fully oriented yarn FDY3500～4200m/min, highly oriented yarn HOY3000～4000m/min; spinning angle 6～ 8 degrees.

(c) Subsequent processing of pre-oriented yarn POY to prepare polybutylene succinate filament; draw ratio: 1.85 times, deformation temperature 50°C, winding speed 450-650m/min.

The aforementioned fully biodegradable polybutylene succinate filaments are not limited to this method of preparation.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (1)

1. a totally biodegradable poly butylene succinate long filament, is characterized in that, the component of described poly butylene succinate long filament is 100% poly butylene succinate;

Described totally biodegradable poly butylene succinate long filament is obtained by following preparation method, specifically comprises:

(a) dry poly butylene succinate section; Wherein baking temperature is 60-90 DEG C, and the time is 6-12h;

B dried described poly butylene succinate section is carried out melt spinning by (), obtain poly butylene succinate pre-oriented yarn POY, fully oriented filament FDY or high oriented yarn HOY;

Spinning temperature: 160 DEG C ~ 270 DEG C, biphenyl, extruder temperature 135 DEG C ~ 270 DEG C; Spinning speed: 1500 ~ 4200m/min;

C pre-oriented yarn is carried out the processing of rear road by (), prepare poly butylene succinate long filament; Draw ratio: 1.2 ~ 1.85 times, deformation temperature 50 ~ 100 DEG C, winding speed: 450 ~ 650m/min.