ES2367748B1 - PROCEDURE FOR OBTAINING THREADS WITH BIOCIDED PROPERTIES. - Google Patents

Abstract

Procedure for obtaining threads with biocidal properties. # In the process the threads are obtained from fibers by spinning and said threads comprise an active substance with biocidal properties, and is characterized by the fact that said active substance is applied during the spinning stage of said fibers. Said spinning stage comprises the following phases: opening the fiber bullets; mix the fibers; card fibers form a wick; uniform the wick; and spin said wick to obtain the threads; the application of said active substance being carried out during the fiber mixing phase. # It allows eliminating the previous finishing stage or the subsequent finishing.

Description

a reduction in costs and procedural times

Procedure for obtaining threads with biocidal properties.

The present invention relates to a process for obtaining threads with biocidal properties, particularly threads with antibacterial and antifungal properties. Background of the invention

The evolution of the markets has led companies to offer new products with improved features to add value to their customers. One of these benefits is the biocidal properties, particularly antibacterial and antifungal.

These properties are achieved by applying to the thread active substances normally by finishing stages after the spinning stage. For this reason, the costs of the active substance must be added to the costs of finishing and transport to the plants where these processes are carried out.

These stages are carried out with the application of the active substance in wet, by bath, which requires high cost facilities, in addition to considerable energy and water consumption.

In addition, the most common procedures apply these chemical threads on the fiber before the spinning stage or on the thread after the spinning stage.

In this way, the process known in the state of the art contemplates two possibilities: first, a pre-finishing stage, where the active substance is applied wet and a spinning stage where the fiber is transformed into thread; second, a spinning stage where the fiber is transformed into thread, and a subsequent finishing stage, where the active substance is applied wet.

Some examples of products with biocidal properties for more widespread textile applications on the market are Sanitized® and Purista®. Description of the invention

With the process of the invention, the aforementioned drawbacks are resolved, presenting other advantages that will be described.

The process for obtaining threads of the present invention allows to eliminate the previous finishing

or the subsequent finishing and is characterized by the fact that said active substance is applied during the spinning stage of said fibers.

Furthermore, said spinning step in the process of the present invention preferably comprises the following phases:

-

open the fiber bullets;

-

mix the fibers;

-

card the fibers for the formation of a wick;

-

uniform the wick; and

-

spin said wick to obtain the threads;

the application of said active substance being carried out during the phase of mixing the fibers.

Advantageously, said application of the active substance is carried out dry and by spraying.

The process of the present invention allows to achieve the following advantages:

I lie;

-

Dry application by spraying prevents the use of wet stages, which consume a greater amount of water and energy;

-

It allows the use of a multifunctional active substance, which makes it possible to confer different properties to the fiber, since in addition to the biocidal properties, it provides the fibers with antistatic characteristics, avoiding the formation of sparks that can cause a fire.

Description of a preferred embodiment

The process of the present invention is for obtaining threads with biocidal properties from fibers, particularly with antibacterial and antifungal properties.

According to the invention, during the spinning stage the application of an active substance with biocidal properties is carried out.

Specifically, the spinning stage comprises the following phases:

-

open the fiber bullets;

-

mix the fibers;

-

card the fibers for the formation of a wick;

-

uniform the wick; and

-

spin said wick to obtain the threads.

It is during the mixing phase of the fibers when the application of the dry active substance is carried out. It should be noted that "dry" means that the thread is not placed in a bath, as is done in the prior art procedures.

Said application is preferably carried out by spraying once the first mixture of the fibers has been made after the bullet is opened. The active substance is sprayed on the curtain-shaped fiber as a previous step to the entrance to the mixing rooms.

One of the important aspects of the process of the present invention is that the active substance, cocoalkyl dimethylbenzyl ammonium chloride, transforms the fiber into a multifunctional product, so that in addition to the biocidal properties it also provides the fiber with antistatic characteristics, in order to avoid formation of sparks that can cause a fire.

As indicated above, the process of the present invention allows a reduction in costs and processing times, allowing significant savings in water and energy consumption.

Although reference has been made to a specific embodiment of the invention, it is apparent to one skilled in the art that the described process is susceptible of numerous variations and modifications, and that all the mentioned details can be substituted by other technically equivalent ones, without departing from the scope of protection defined by the appended claims.

3 EN 2367748A1 4

Claims (5)

1. Procedure for obtaining threads with biocidal properties, said threads being obtained from fibers by spinning and said threads comprising an active substance with biocidal properties, characterized in that said active substance is applied during the spinning stage of said threads fi bers, said spinning stage comprising the following phases:

-

open the fiber bullets;

-

mix the fibers;

-

card the fibers for the formation of a wick;

-

uniform the wick; and

-

spin said wick to obtain the threads;

the application of said active substance being carried out during the phase of mixing the fibers.

2.

Process according to claim 1, wherein said application of the active substance is carried out dry.

3.

Process according to any of the preceding claims, wherein said application of the active substance is carried out by spraying.

Four.

Process according to any of the preceding claims, wherein said active substance is cocoalkyl dimethylbenzylammonium chloride.

SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 200900129 SPAIN Date of submission of the application: 19.01.2009 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: See Additional Sheet RELEVANT DOCUMENTS

Category

Documents cited Claims Affected

X

"The prevention of exposure to endocrine disruptors in the Textile-Clothing Industry". ISTAS TRADE UNION INSTITUTE OF WORK ENVIRONMENT AND HEALTH; pages 8,9,12,13,27-30,38,59,60,65,84,85. 1-4

TO

ES 2045409 T3 (BASF CORP) 16.01.1994, page 2, lines 3-62; page 6, lines 27-36. one

TO

ES 2282316 T3 (MILLIKEN & CO) 16.10.2007, page 2, lines 3-13; page 2, line 41 - page 3, line 22; page 4, lines 16-30; page 5, lines 18-25. one

TO

EN 2259556 B1 (ESPUELAS PEÑALVA, JOAQUÍN) 01.10.2006, page 4, lines 35-37; page 5, lines 45-50; page 9, lines 23-43; page 10, line 7 - page 11, line 29; page 12, lines 5-8. one

TO

ES 2290570 T3 (3M INNOVATIVE PROPERTIES CO) 16.02.2008, page 2, lines 51-61; page 4, lines 34-39. one

TO

ES 2339546 T3 (RHODIANYL) 21.05.2010, page 2, lines 3-10; page 2, lines 32-47; page 4, lines 55-58; page 5, lines 1-11; page 5, lines 21-51. one

TO

EN 2159561 T3 (PROCTER & GAMBLE) 16.10.2001, page 2, lines 3-32; page 2, lines 59-62; page 3, lines 27-47; page 6, line 28 - page 7, line 8. 1.2

TO

ES 2194579 B1 (MI SOO SEOK) 16.11.2003, column 1, lines 3-5; column 1, line 65 - column 2, line 55; column 5, line 62 - column 6, line 14. 1.3

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 17.10.2011

Examiner M. C. Fernández Rodríguez Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 200900129 CLASSIFICATION OBJECT OF THE APPLICATION D01F1 / 10 (2006.01) A01P1 / 00 (2006.01) C01C1 / 16 (2006.01) Minimum documentation sought (classification system followed by classification symbols) D01F, A01P, C01C Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENTIONS, EPODOC State of the Art Report Page 2/4  WRITTEN OPINION Application number: 200900129 Date of Written Opinion: 17.10.2011 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 1 -4 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1 -4 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 200900129 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

"The prevention of exposure to endocrine disruptors in the Textile-Clothing Industry". ISTAS TRADE UNION INSTITUTE OF WORK ENVIRONMENT AND HEALTH; pages 8,9,12,13,27-30,38,59,60,65,84,85. 2007

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement Document D01 discloses a process for obtaining threads with biocidal properties, in which said threads are obtained from fibers by spinning and said threads comprising an active substance with biocidal properties, so that an active substance is applied, during the spinning stage of said fibers, said spinning step comprising, the following phases: -preparation of fibers -mixing -carding the fibers, for the formation of the wick; -uniforming the wick: gathered, stretched, twisted and combed fibers -pun yarn and various substances can be added to the preparation and spinning of textile fibers (see table 41). Document D01 does not specify, unlike the request, that bullets be opened, or that the active substance biocide, be added during the fiber mixing phase. However, these characteristics represent obvious options for an expert in the field. Therefore, independent claim 1 is considered to have no inventive activity (Art. 8 L11 / 86). Document D01 cites among the substances that can be added in the preparation and spinning of textile fibers, cocoalkyl dimethylbenzylammonium chloride. Therefore, it is considered that claim 4 lacks inventive activity (Art.8 L11 / 86). Both claim 2 and 3 are considered to define obvious options for a person skilled in the art, in view of the state of the art. Therefore, it is concluded that claims 2 and 3 do not imply inventive activity (Art.8 L11 / 86). State of the Art Report Page 4/4