Menú Cerrar

Congelación de alimentos envasados al vacío

La congelación por debajo de -18ºC es el método más utilizado (por los que afortunadamente disponemos de congeladores) para mantener los alimentos almacenados durante semanas o incluso meses.

Sin embargo existen tres inconvenientes que vamos a evitar utilizando una envasadora al vacío; Con ello vamos a conseguir mantener nuestra comida en óptimas condiciones y por más tiempo:

  • Olores que se pasan a otros alimentos
  • Escarchado de vegetales y productos frescos
  • Quemaduras en carnes y pescados

LOS OLORES EN EL CONGELADOR

A pesar de que envolvamos los alimentos en film plástico o incluso papel de aluminio, a menudo al coger algún paquete notamos un fuerte olor a pescado en él o a una mezcla de varias otras cosas.

Es normal, ya que las partículas responsables del olor son moléculas muy sencillas. Por ejemplo la «putrescina» es una amina de tan solo 4 Carbonos. Con este minúsculo tamaño, dichas partículas pueden moverse libremente por toda la cámara pudiendo entrar o salir por el mínimo espacio que encuentren entre los pliegues de cualquier envoltorio.

Esto significa que además de mezclarse los olores, si un alimento se pone malo, su olor se traspasará al resto de productos.

olor-congelados

Solo un sellado al vacío puede contener el olor de cada alimento impidiendo que se escape de su envase y se propague y mezcle con el resto de productos.

ESCARCHADO

Los productos frescos y vegetales sobre todo sufren daños a consecuencia de la formación de escarcha.

El proceso de escarchado sobre los alimentos es el siguiente: El agua del aire contenido en la cámara frigorífica migra hacia los alimentos, posándose sobre ellos y formando redes cristalinas de hielo. Estos cristales rompen las capas más externas de los alimentos, y se observa claramente en verduras cuando no son envasadas al vacío.

QUEMADURAS

Un producto «quemado» por el frío tiene similitudes con la quemadura por calor: se deshidrata, adquiere un tono marrón y su estructura queda dañada.

Los productos que más sufren las quemaduras son las carnes y los pescados. Ello es debido a que contienen un alto porcentaje de agua en su interior. Al congelar el alimento, estas moléculas de agua salen al exterior pasando directamente a estado vapor sin pasar por el estado líquido, y producen las quemaduras.

Al deshidratarse y quemarse la carne adquiere un tono marrón. Esto es debido a que del mismo modo que pierde el agua, pierde también la «mioglobina» (responsable de su color rojo), quedándose en el exterior de la carne y volviéndose marrón al oxidarse con el aire.

La solución a estos dos problemas relacionados con la aparición de cristales de hielo y la deshidratación y quemaduras en alimentos se soluciona completamente con un envasado al vacío de estos productos antes de introducirlos al congelador.

salmon envasado al vacio

Un alimento empaquetado al vacío hace imposible que el agua que contiene salga al exterior, evitando así su deshidratación. De este modo sus propiedades nutricionales quedan intactas y al mantener el agua conservamos también el sabor y la textura de los alimentos.

Por otro lado, también impedimos que se formen cristales de hielo (escarcha) en la superficie de los productos, al estar aislados completamente de la atmósfera del congelador. Con ello evitamos dañar sobre todo vegetales y productos frescos.

 

14.435 Comentarios

  30. CHEE TING
    Responder

    923032 654859There a few fascinating points over time here but I dont know if I see them all center to heart. There exists some validity but Let me take hold opinion until I look into it further. Very great post , thanks and now we want far more! Included with FeedBurner at exactly the same time 457657

  215. Malcolm Brunner
    Responder

    Hi there would you mind stating which blog platform you’re working with?
    I’m planning to start my own blog soon but
    I’m having a difficult time choosing between BlogEngine/Wordpress/B2evolution and Drupal.

    The reason I ask is because your design seems
    different then most blogs and I’m looking for something completely unique.
    P.S Sorry for getting off-topic but I had to ask!

  220. Leslie Parra
    Responder

    Howdy just wanted to give you a quick heads up. The text
    in your content seem to be running off the screen in Internet
    explorer. I’m not sure if this is a format issue or something to do with web browser compatibility but
    I thought I’d post to let you know. The style and design look great though!
    Hope you get the problem resolved soon. Many thanks

  226. Michael Bevell
    Responder

    Hi, I do think this is a great blog. I stumbledupon it 😉
    I am going to come back once again since i have book marked it.
    Money and freedom is the greatest way to change, may you be rich and continue to guide other people.

  228. Greg Croom
    Responder

    I simply couldn’t depart your website prior to suggesting that I really loved
    the standard information a person provide for your visitors?
    Is going to be back frequently in order to investigate cross-check new
    posts

  230. Carol Wright
    Responder

    First off I want to say excellent blog! I had a quick question in which
    I’d like to ask if you don’t mind. I was interested to know how you center
    yourself and clear your mind prior to writing. I have had a hard time clearing my mind in getting my thoughts out there.
    I truly do enjoy writing however it just seems like the first 10
    to 15 minutes tend to be wasted just trying to figure out how to begin. Any
    recommendations or tips? Many thanks!

  326. Irma Collamer
    Responder

    I have been browsing online greater than three hours lately, yet I never discovered any interesting article like yours.

    It’s pretty value enough for me. Personally, if all web owners and bloggers made good content as you did, the web shall be a lot more useful
    than ever before.

  341. Aubrey Springer
    Responder

    Howdy just wanted to give you a quick heads up. The words in your article seem to be running
    off the screen in Opera. I’m not sure if this is a
    formatting issue or something to do with internet browser compatibility but I figured I’d post to let you know.
    The layout look great though! Hope you get the issue fixed soon.
    Cheers

  379. j.mp
    Responder

    Fantastic items from you, man. I’ve take into accout your stuff prior to and you are
    simply extremely great. I actually like what you have
    acquired here, certainly like what you are saying and the way in which
    wherein you say it. You make it enjoyable and you still
    take care of to stay it smart. I cant wait to read much more from you.
    That is really a great site.

  381. scoliosis surgery it
    Responder

    I am really impressed together with your writing abilities and also with the layout on your blog.

    Is this a paid subject matter or did you modify it yourself?
    Anyway stay up the excellent high quality writing, it is rare to peer a great blog like this one these days..

  457. j.mp
    Responder

    I do not know whether it’s just me or if perhaps everyone else encountering issues with your blog.
    It appears like some of the written text in your posts are running off the screen. Can somebody else please provide feedback
    and let me know if this is happening to them as well?

    This might be a problem with my internet browser
    because I’ve had this happen before. Cheers cheap flights http://1704milesapart.tumblr.com/ cheap flights

  501. 카지노사이트
    Responder

    Editor’s note: The links to James’s course are affiliate links. We’re proud to help James get the word out about her course, which is terrific.
    I totally agree. But what happens when you end your post with an invitation for feedback or discussion and nobody bites? That happens to me about half the time I end a post with a call for feedback. Then the post just sits there looking lonely for a few days before I move on.
    카지노사이트

  502. 카지노사이트추천
    Responder

    Ha ha… I told James he was setting himself up on this one just before your comment came in. Too funny. 🙂
    I tend to see a lack of comments when we blatantly ask for commentary or ask a question that is way too open (such as, “What’s your experience?”). The way you word your ending has to be compelling enough that the reader *wants* to tell you about his or her experience. Just asking for it flat out isn’t enough.
    https://main7.net/%ec%b9%b4%ec%a7%80%eb%85%b8%ec%82%ac%ec%9d%b4%ed%8a%b8%ec%b6%94%ec%b2%9c/