Knowde Enhanced TDS
Identification & Functionality
- CASE Ingredients Functions
- Technologies
- Product Families
Features & Benefits
- Advantages
- Widely used in the paper industry at the size press and calender stack, and in adhesives tackified with boric acid.
- Suitable for wide range of adhesive and paper applications such as grease prooof coating, UF glue and etc due to its excellent binder characteristic. The medium viscosity gives flexibility in formulating water based adhesives with boric acid with or without clay and/or starch.
- Excellent film forming characterictic with hot water solubility, resistance to oils, grease and solvents, as well as low oxygen and water vapor transmission rates.
Applications & Uses
- Applications
- Recommended Applications
Elvanol® 71-30 is widely used in the paper industry at the size press and calender stack, and in adhesives tackified with boric acid.
ADHESIVES:
In adhesive applications Elvanol®71-30 can be used alone or often in combination with extenders such as starch, dextrin or clay. As the proportion of Elvanol®increases, the adhesive strength and water resistance also improve. Examples of Elvanol® adhesives applications include:
- for paper and paperboard, alone or in combination with other additives; n as a component in industrial adhesives for bonding paper, textiles, leather, films and porous substrates.
- for laminating adhesives which are used in the manufacture of solid fiberboard, linear board, spiral wound tubes and cores, and laminated specialties; n in bag adhesives and pastes; and
- as an adhesive in corrugated container board.
- The medium viscosity gives flexibility in formulating water based adhesives with boric acid with or without clay and/or starch.
PAPER AND PAPERBOARD SIZING AND COATINGS:
In sizing and coatings for paper and paperboard, Elvanol® 71-30 can be used alone or combined with starch and/or pigment. The proportion of Elvanol® to be used depends on desired physical properties and economics. Some specific paper uses include:
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For fine writing and printing papers as surface size material with starch;
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as grease-proof coating or release coating on paper specialties; and
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as binder in pigmented size press coatings to provide pigment loading.
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When substituted for all or part of the starch, the lower binder add-on improves opacity and makes the paper less yellow.
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Elvanol® 71-30 is easily jet-cooked alone or with starch with no additional holding time required after cooking.
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Elvanol® 71-30 has found wide use as a calender stack treatment for controlling curl and linting for paperboard grades.
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Elvanol® 71-30 is a good choice as a carrier for grease and oil-resistant treatments applied at the size press or calender stack.
FILMS:
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Unsupported films cast from water solutions of Elvanol® 71-30 and plasticizers are transparent, tough, tear-resistant and punctureresistant. Elvanol® provides a unique combination of properties. Films have hot water solubility, in addition to resistance to oils, grease and solvents, and have low oxygen and water vapor transmission rates. These properties make films of Elvanol® 71-30 suitable for dissolvable unit packages and hospital laundry bags where hot water solubility and cold water resistance is needed.
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Viscosity (20°C (68°F), 4wt% aqueous) | 27.0 - 33.0 | cps | — |
| Degree of Hydrolysis | 99.5 | mol % | — |
| Ash Content (Sodium oxide) | max. 0.7 | % | — |
| Residual Methanol Content | max. 1.0 | wt % | — |
| pH | 5.0 - 7.0 | - | — |
| Volatiles Content | max. 5.0 | wt % | — |
Regulatory & Compliance
- FDA Status
Elvanol® 71-30 polyvinyl alcohol complies with U.S. Food and Drug Administration (FDA) Regulations under the following Sections of Title 21 CFR, and may be used in contact with food, subject to the limitations and requirements therein:
- 175.105 - Adhesives
- 175.300 - Resinous and polymeric coatings
- 175.320 - Resinous and polymeric coatings for polyolefin films
- 176.170(b) - Components of paper and paperboard in contact with aqueous and fatty foods
- 176.180 - Components of paper and paperboard in contact with dry food
- 177.1200 - Cellophane
- 177.1670 - Polyvinyl alcohol film
- 177.2260 - Filters, resin-bonded
- 177.2800 - Textiles and textile fibers
Technical Details & Test Data
- Effects of Concentration on Viscosity
- Temperature vs Viscosity
Storage & Handling
- Safety and Handling
Elvanol® 71-30 is technical quality polyvinyl alcohol. It is not recommended for inclusion in any food or preparation that might be taken internally.Under certain conditions of use, dust may be formed from Elvanol® polyvinyl alcohol. Kuraray recommends that dust from Elvanol® be treated as a nuisance dust, which is regulated by the Occupational Safety and Health Administration.
Elvanol® may be disposed of by incineration or landfill. However, any disposal method must be in compliance with all applicable local, state and federal regulations.