ITPI20000050A1 - PROCEDURE FOR THE PRODUCTION OF ANALLERGIC AND COMPLETELY ECOLOGICAL LEATHER. - Google Patents

Description

PATENT DESCRIPTION OF INVENTIONS BY TITLE

Process for the production of hypoallergenic and completely ecological leather

The present invention consists in the production of hypoallergenic and completely ecological leather, using an innovative system which provides for an almost total elimination of harmful agents from the finished product. This leather processing system requires the use of products that have never been used for the purpose and mainly consist of natural substances, rather than synthetic ones, which do not determine the presence of harmful agents in the finished product, or percentages such as to determine allergy or dermatitis. While leather treated with the traditional system can be considered ecological if the harmful agents fall within certain parameters and the environmental impact is therefore lower, this procedure involves a reduction of these harmful agents making it totally ecological. This is to underline how much the traditional system is conditioned by the presence of products containing harmful substances, for the realization of the finished product considered for their specific functions of considerable importance for the processing.

Processing system for the production of hypoallergenic and completely ecological leather.

-First phase usually called "soaking or soaking of the leather"

100% water at 20 ° - barrel stopped 24 hours - bath washing and draining - rotation for 10 minutes and water change.

-Second phase usually called "Calcinaio"

100% water at 25 ° - 0.3% degreaser - 3% sodium sulphide - 2% lime - barrel rotation 60 minutes -1% sodium sulphide - 3% lime - barrel rotation 5 hours - barrel stopped 12 hours

-Third phase usually called "Purga e piklaggio".

Skinning and splitting the leather to the desired thickness - 100% water at 40 ° - 0.2% degreaser -0.6% boric acid - 30 minutes rotation - bath washing and draining - 60% water at 40 ° - 1.2% deliming agent -0.6% ammonium sulphate - barrel rotation 30 minutes and PH control at 8/9 - 0.4% macerant - barrel rotation 30 minutes - 8% sea salt - barrel rotation 10 minutes - 0.6% formic acid - barrel rotation 10 minutes - 0.6% formic acid - barrel rotation 30 minutes -0.8% sulfuric acid - barrel rotation 90 minutes - barrel stopped 12 hours - PH control at 3, 5-3, 6 - draining 60% bath.

-Fourth phase usually called "Pre-tanning"

1% hexametaphosphate - barrel rotation 60 minutes.

- Fifth phase usually called "Tanning"

19% quebracho ATO - 8% mimosa extract - barrel rotation 8 hours until reaching temperature 38 ° C - 100% water at 30 ° - 0.5% oxalic acid - barrel rotation 20 minutes - bath draining - remove leather from barrel - put leather on stand - let leather rest for 24 hours, press and shave to desired thickness

- Sixth phase usually called "Fatliquor" -100% water at 35 ° on shaved leather weight - 1% oxalic acid - Drum rotation 40 minutes - Leather washing up to PH 4 - Total bath draining - 100% water at 38 ° - 2% formate - 0.5% bicarbonate - Barrel rotation 40 minutes - Leather washing with water at 50 ° C - Draining bath - Dry fatliquor composed as follows: 1% olive oil - 1% soybean oil - 0.5% sodium chloride - 3% various seed oil - 0.5% soy lecithin - 4% lard oil - 0.2% higher sulphated alcohols - 0.2% higher ethoxylated alcohols -0.2% ethoxylated fatty acids - 1% fatty alcohols sulfonates and ethoxylates - 3% betaines - Rotation until exhaustion fatliquor, about 2 hours - 50% water at 45 ° C - 0.5% oxalic acid - Barrel rotation 20 minutes - Remove leather from barrel - Put leather on a stand - Let it rest leather 24 hours - Pressing leather - Putting leather in an aerial chain for drying - Staking leather - Seventh phase usually called "Finishing": - - -If necessary, finish exclusively with food dyes dissolved in water, or in products that do not contain harmful substances or called "Ecological"

Claims (5)

CLAIMS 1) Process for obtaining leather produced according to parameters that can be considered at least as completely ecological and hypoallergenic which involves the use of preparations according to an innovative concept, aimed at eliminating the presence of harmful substances, now considered essential for such treatments. 2) Process referred to in point 1) which includes at least the following processing phases usually called as reported, carried out as described: first phase called "Softening or re-greening of the leather"; Second phase called "Calcinaio"; Third phase called "Purge and pickling"; Fourth phase called "Pre-tanning"; Fifth phase called "Tanning"; Sixth phase called "Fattening"; Seventh phase called "Refinement". 3) Process referred to in point 2) in which in the phase called "fattening" a product containing natural substances is used, composed at least of products as follows: olive oil - soybean oil - sodium chloride - various seed oil - soy lecithin - lard oil - higher sulfated alcohols - higher ethoxylated alcohols - ethoxylated fatty acids - sulphonated and ethoxylated fatty alcohols - betaine - water - vitamin E - edible oils. 4) Finished product, or treated and / or colored leather, obtained at least according to this working procedure, with qualitative characteristics referable to leather treated according to traditional procedures, which however do not totally eliminate harmful agents and / or within parameters that can be considered hypoallergenic and / or that are not the cause of dermatitis. 5) Preparation composed at least of components as per point 3) or of components and / or derivatives and / or products that do not release harmful substances, conceived to obtain hypoallergenic and completely ecological leather as it does not contain harmful substances.