US2116332A - Method for bleaching cotton and analogous textile fibers - Google Patents
Method for bleaching cotton and analogous textile fibers Download PDFInfo
- Publication number
- US2116332A US2116332A US733116A US73311634A US2116332A US 2116332 A US2116332 A US 2116332A US 733116 A US733116 A US 733116A US 73311634 A US73311634 A US 73311634A US 2116332 A US2116332 A US 2116332A
- Authority
- US
- United States
- Prior art keywords
- bleaching
- peroxide
- textile fibers
- cotton
- boil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
Definitions
- This invention relates to improvements in the bleaching of cotton and analogous fibers.
- the object of this invention is a process in which the boil is inserted between two bleaching processes in which for instance a first bleaching process consists in a treatment of the singed or unsinged goods with a bleaching agent capable of splitting oil oxygen, as for example, a per oxidg bath, to which gapstic alkalihas been added and whiclfis'carriedout sd'inte nsively, that the subsequent boiling process has an incomparably better cleansing effect than that of any other boiling process which has been used up to the present.
- a first bleaching process consists in a treatment of the singed or unsinged goods with a bleaching agent capable of splitting oil oxygen, as for example, a per oxidg bath, to which gapstic alkalihas been added and whiclfis'carriedout sd'inte nsively, that the subsequent boiling process has an incomparably better cleansing effect than that of any other boiling process which has been used up to the present.
- the boil in this case is so penetrating and efiective that it is easy to finish the bleach after the boil either by a short treatment with a peroxide bleach bath to which caustic alkali has been added or with a hypochlorite bleach.
- the first peroxide bleach is not merely a desizing, as used in well known cotton bleaching methods; but it has been proved that, apart from the much longer duration of such bleach processes, it was impossible, when omitting the boiling process, to produce the same degree of purity and cleanness. The reason being that it is not sufficient to remove the husks in order to get a clean white; on the contrary it is absolutely necessary, that the fatty and waxy materials should also be removed. The latter can only be removed in the boil, as is proved in many experiments.
- Peroxide bleaching baths which are used before and after the boil, may consist for instance of solutions of sodium peroxide and hydrogen peroxide in the presence of waterglass and if desirable with the addition of other stabilizers or wetting out agents In place of sodium peroxide, caustic alkali and hydrogen peroxide can be used.
- the bleaching cycle will consist of (l) (a) Caustic alkali peroxide bath.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detergent Compositions (AREA)
- Treatment Of Fiber Materials (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Description
UPHIUN Ul' H'JHlLtb 6t l'lbillib,
Patented May 3, 1938 UNITED STATES PATENT OFFICE METHOD FOR BLEACHING COTTON AND ANALOGOUS TEXTILE FIBERS Hugo Weiss, Augsburg, Germany No Drawing. Application June 29-, 1934, Serial No. 733,116. In Germany July 10, 1933 1 Claim.
This invention relates to improvements in the bleaching of cotton and analogous fibers.
The bleaching of cotton by means of bleaching baths containing caustic alkali and peroxide compounds with or without a combination of a chlorine bleaching bath is well known.
In all these processes the materials are cleansed before bleaching. This cleansing generally consists of desizing and boiling. This also applies to processes in which old peroxide bleaching baths which still contain active oxygen are employed for the desizing.
It is also known to bleach cotton by first desizing then using peroxide bleaching baths to which caustic alkalies have been added and in addition as a further aid to bleaching to use a chlorine bleaching bath. In such a combination of baths the "caustic boil is omitted.
The object of this invention is a process in which the boil is inserted between two bleaching processes in which for instance a first bleaching process consists in a treatment of the singed or unsinged goods with a bleaching agent capable of splitting oil oxygen, as for example, a per oxidg bath, to which gapstic alkalihas been added and whiclfis'carriedout sd'inte nsively, that the subsequent boiling process has an incomparably better cleansing effect than that of any other boiling process which has been used up to the present. The boil in this case is so penetrating and efiective that it is easy to finish the bleach after the boil either by a short treatment with a peroxide bleach bath to which caustic alkali has been added or with a hypochlorite bleach.
In the suggested process the first peroxide bleach is not merely a desizing, as used in well known cotton bleaching methods; but it has been proved that, apart from the much longer duration of such bleach processes, it was impossible, when omitting the boiling process, to produce the same degree of purity and cleanness. The reason being that it is not sufficient to remove the husks in order to get a clean white; on the contrary it is absolutely necessary, that the fatty and waxy materials should also be removed. The latter can only be removed in the boil, as is proved in many experiments.
Therefore all process eliminating the boil could only be used in practice in a limited Way.
By the new process it is possible very satisfactorily to bleach different kinds of cotton, both thin as well as thick qualities, and single or mixed.
Peroxide bleaching baths, which are used before and after the boil, may consist for instance of solutions of sodium peroxide and hydrogen peroxide in the presence of waterglass and if desirable with the addition of other stabilizers or wetting out agents In place of sodium peroxide, caustic alkali and hydrogen peroxide can be used. M
For both peroxide bleaching processes the best temperature lies between and Celsius.
Thus, the bleaching cycle will consist of (l) (a) Caustic alkali peroxide bath.
(b) Boil. (c) Caustic alkali peroxide bath.
( (a) Caustic alkali peroxide bath.
(1)) Boil.
(c) Chlorine bleaching bath.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE444059X | 1933-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2116332A true US2116332A (en) | 1938-05-03 |
Family
ID=6533251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US733116A Expired - Lifetime US2116332A (en) | 1933-07-10 | 1934-06-29 | Method for bleaching cotton and analogous textile fibers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2116332A (en) |
| GB (1) | GB444059A (en) |
-
1934
- 1934-06-29 US US733116A patent/US2116332A/en not_active Expired - Lifetime
- 1934-07-09 GB GB20143/34A patent/GB444059A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB444059A (en) | 1936-03-09 |
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