CN1679435A

CN1679435A - Starch swelling forming method

Info

Publication number: CN1679435A
Application number: CNA2004100129998A
Authority: CN
Inventors: 吕启晟
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-09
Filing date: 2004-04-09
Publication date: 2005-10-12
Anticipated expiration: 2024-04-09
Also published as: CN100553539C

Abstract

A method for shaping the starch by puffing includes such steps as providing a hydrophilic viscose substance as the flowable carrier, proportionally mixing it with raw starch, filler and assistant kneading, loading the mixture in a mould, and puffing at 150-280 deg.C.

Description

The expanded manufacturing process of a kind of starch

The invention belongs to the packing technique field, particularly a kind of is the making manufacturing process of the biodegradation packing material of base-material with starch.

Raising along with people's living standard and know-how, environmental consciousness and health perception strengthen gradually, the various packing material that past makes of foamed plastic, as disposable tableware container, supermarket with pallet, cake box, panoramic industrial products with amortizing packaging material etc., be subjected to environmentalist's criticism more and more, the one,, the production process of foamed plastic and discarded after the environmental disruption that causes be on record, the most developed countries and the Chinese government have all prohibited its application in some field.The 2nd, the stripping of its residual monomer enters food and both was detrimental to health when being used for packaging for foodstuff, influences flavours in food products again.For many years, existing many scientific and technical personnel attempt to replace foamed plastic with some degradable environment friendly materials and make above-mentioned packing material, and have produced many valuable application achievements, are the composite technology etc. of base-material as paper mould technology, starch and with it.Wherein the every performance figure and the foamed plastic of starch and composite material thereof are more approaching, add that the regeneration period weak point and the production use of its resource is little to the negative effect of environment, more meet the strategy of sustainable development, and prospect is expected.At present existing many relevant patent applications patent, beginning of having used.As ZL 97109188, but what existing technology adopted basically all is to insert the process of drying and moulding in the mold heat after the starch gelatinization, it is different just to participate in compound description of materials, auxiliary agent and proportioning, there are following two kinds of drawbacks at least in this method, the one, can absorb water in a large number during starch gelatinization, the solid water rate after the starch gelatinization can be multiplied, if will keep its good mobility so that full die cavity, water generally will reach 3 to 1 to 5 to 1 with the ratio of starch, even higher.So, when forming and hardening, just there is a large amount of water vapours to eject, both consumed energy, elongated the formed product time again, also very high to the exhaust performance requirement of mould, brought many difficulties to moulding; The 2nd, in the time will adding fibre composition (essential often) in the material, mix after fiber must being pulverized and can mix evenly.Pulverized fiber also can be brought very large loss to the length of fiber except power consumption is very high, the addition of fiber is increased greatly, thereby significantly improved raw-material cost, and some performance of goods also is difficult to be protected.

The present invention puts forward at this situation.It has utilized the low characteristics of living starch water absorption rate, evade living starch again and in water, left standstill the unfavorable factor of easy precipitation, dispersion stabilization difference, allow starch gelatinization in hot-die, expanded, drying and moulding once finish, significantly reduced evaporation of water amount in the forming process, reduce energy consumption, also reduced cost.When needing in the material to add vegetable fibre (generally being paper pulp), need not dry pulp is pulverized, mixing gets final product in the carrier but the wet pulp after directly will breaing up mixes, if carrier is a gelatinized starch, can with give birth to starch mix stir evenly in an amount of wet pulp of moisture after gelatinization again, thereby avoided highly energy-consuming that dry pulp pulverizes, low efficiency and to the cataphoretic failure of fibre length (important indicator of paper pulp fiber quality).

The expanded manufacturing process of starch-based product is characterized in that this method has adopted the flowing carrier of the hydrophilic thick substances of tool (as gelatinized starch, batter, sodium silicate, poly-vinyl alcohol solution etc. and their various ratiometric compounds) as starch etc.Sneak in the wetting ability flowing carrier of thickness giving birth to starch, auxiliary packing and auxiliary agent, after fully mediating, getting an amount of compound, to insert the mould temperature be through the product of the expanded formation definite shape of hot-die in 150-280 ℃ the forming mould.

The expanded manufacturing process of starch-based product is characterized in that the method for mixing paper pulp fiber in its goods is: earlier with in the pulpboard encroached water, break up and stir well and filter moisture content after even, sneak in the wetting ability flowing carrier again, add starch and other fillers, auxiliary agent etc. then; If the wetting ability flowing carrier is gelatinized starch or batter, carrier can be mixed with starch or flour in the wet pulp that filters moisture, heat gelatinization then while stirring, wait to finish gelatinization and stop the heating after add main body starch and other compositions again.

The expanded manufacturing process of starch-based product is characterized in that when being flowing carrier with gelatinized starch and batter, carrier was not less than 0.2: 1 with the amount of starch or flour and the ratio of fiber consumption, generally 0.5～3: more suitable in 1 the scope; Carrier was not less than 0.02: 1 with the amount of starch or flour and the ratio of main body starch consumption, generally 0.05～0.5: more suitable in 1 the scope.

Embodiment 1

Getting pulp board 100g, to place water to stir diffusing, filters most of water (keeping about 1000g water) back and add 100g starch and 20g stearic acid, fully heats gelatinization behind the mixing, adds the livings starch of 800g gelatinization is finished after, and kneading is even.

Mold heated to 200～240 ℃ of temperature, is got an amount of above-mentioned material and dropped in the die cavity, matched moulds and locking.Back depanning to be dried promptly gets goods.

Embodiment 2

Getting pulp board 100g, to place water to stir diffusing, filter polyvinyl alcohol water solution and the 20g stearic acid of most of water (keeping about 900g water) back adding 50g starch, 200g10%, fully heat gelatinization behind the mixing, add living starch and the 800g french talc of 800g after gelatinization is finished, mediate evenly.

Embodiment 3

Getting pulp board 100g, to place water to stir diffusing, filters the polyvinyl alcohol water solution that most of water (keeping about 300g water) back adds 900g10%, fully adds livings starch, 500g french talc and the 20g stearic acid of 800g behind the mixing, mediates even.

Embodiment 4

Getting pulp board 100g, to place water to stir diffusing, filters most of water (keeping about 300g water) back and add 1000g sodium silicate, fully adds livings starch, 500g french talc and the 20g stearic acid of 800g behind the mixing, mediates even.

Embodiment 5

Getting pulp board 100g, to place water to stir diffusing, filters most of water (keeping about 1100g water) back and add 100g flour and 20g stearic acid, fully heats gelatinization behind the mixing, adds livings starch and the 1000g french talc of 800g gelatinization is finished after, and kneading is even.

Embodiment 6

Getting pulp board 100g, to place water to stir diffusing, filters most of water (keeping about 1000g water) back and add 50g starch and 20g stearic acid, fully heats gelatinization behind the mixing, adds livings starch and the 1200g french talc of 600g gelatinization is finished after, and kneading is even.

Claims

1, the expanded manufacturing process of a kind of starch-based product, it is characterized in that this method will give birth to starch, auxiliary packing and auxiliary agent and sneak in the wetting ability flowing carrier of thickness (as gelatinized starch, batter, sodium silicate, poly-vinyl alcohol solution etc. and their various ratiometric compounds), after fully mediating, getting an amount of compound, to insert mould temperature be through the product of the expanded formation definite shape of hot-die in 150-280 ℃ the forming mould.

2, the expanded manufacturing process of starch-based product as claimed in claim 1, can obviously improve the toughness and the intensity of goods when it is characterized in that adding an amount of fibre composition in its raw material, the method of mixing fiber is: earlier with in fiber (generally the being paper pulp) encroached water, break up and stir well and filter most of water after even, sneak into again in the wetting ability flowing carrier, add starch and other fillers, auxiliary agent etc. then; If the wetting ability flowing carrier is gelatinized starch or batter, starch or the flour of using as carrier can be mixed in the wet fiber that contains suitable moisture, heat gelatinization then while stirring, wait to finish gelatinization and stop the heating after add main body starch and other compositions again.

3, the expanded manufacturing process of starch-based product as claimed in claim 1, it is characterized in that when being flowing carrier with gelatinized starch and batter, carrier with the ratio of the amount of starch or flour and fiber consumption be not less than 0.2: 1, be not less than 0.02: 1 with the ratio of main body starch consumption.